SINOPSE DA FEEC - Unicamp · SINOPSE DA FEEC Volume 3 - Number 3 September-December 2010 Academic...

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SINOPSE DA FEEC Volume 3 - Number 3

September-December 2010 Academic Bulletin of FEEC-UNICAMP

Editorial This is the thrird issue of the second volume of ―SINOPSE DA

FEEC‖ – the Academic Bulletin of the School of Electrical and

Computer Engineering (FEEC) of the University of Campinas

(Unicamp). In this issue we summarize the main academic

results of FEEC’s faculty work in the third quadrimester of

2010.

The ―SINOPSE DA FEEC‖ is divided into sections that group

abstracts of same type of work: Article in journals, Article in

proceedings, Book editions, Book Chapter, Scientific Event

Organization, Patents, Short courses in events, Master’s

dissertations, and Doctoral theses. In each section the abstracts

are sorted by research area: Automation; Biomedical

Engineering; Computer Engineering; Electronic,

Microelectronic, Opto-electronic; Electrical energy; and

Telecommunication-Telematic.

Compiling the results we present the abstracts of thirty articles

in journals, one hundred eighty one articles in event

proceedings, one book edition, and two book chapter. We also

emphasize the organization of one scientific event and one short

course in scientific events. Two final sections present the

abstracts of twenty one master dissertations and eleven doctoral

theses defended in this period.

This and other issues and the previous volume of the Sinopse are

available at FEEC’s web site (www.feec.unicamp.br/sinopse).

There, it is possible to access the complete text of articles that

have a DOI register.

The master dissertation and doctoral thesis complete texts are

available at Unicamp’s Engineering Library web page (BAE), at

http://libdigi.unicamp.br/document/list.php?tid=42.

All dissertation and theses are written in Portuguese.

In this last issue of the year, we would like to thank everyone

that contributed to make this volume so plentiful. Our special

thanks to all secretaries that helped us to produce it. We thank

the authors and the new Masters and Doctors, and acknowledge

all by listing their names at the end of this issue.

José Raimundo de Oliveira

FEEC Associate Director

Article in journal

Automation

A new method for robust Schur stability analysis Maurício C. Oliveira, Ricardo Coração de Leão Fontoura de

Oliveira, Pedro Luis Dias Peres

International Journal of Control ISSN: 0020-7179 v:83 n:10 Oct-2010 pp:2181-2192 doi: 10.1080/00207179.2010.511274

Abstract: This article is concerned with robust stability of

uncertain discrete-time linear systems. The matrix defining the

linear system (system matrix) is assumed to depend affinely on

a set of time-invariant unknown parameters lying on a known

polytope. Robust stability is investigated by checking whether a

certain integer power κ of the uncertain system matrix has

spectral norm less than one. This peculiar stability test is shown

to be equivalent to the positivity analysis of a homogeneous

symmetric matrix polynomial with precisely known coefficients

and degree indexed by κ. A unique feature is that no extra

variables need to be added to the problems being solved.

Numerical experiments reveal that the value of κ needed to test

robust stability is mostly independent of the system dimension

but grows sharply as the eigenvalues of the uncertain system

approach the unit circle. By identifying the proposed stability

test with a particular choice of a parameter-dependent

Lyapunov function, extra variables can be introduced, yielding

linear matrix inequalities optimisation problems of improved

convergence.

Keywords: robust stability, discrete-time systems,

parameter-dependent Lyapunov functions, linear matrix

inequalities

Consciência Artificial Ricardo Ribeiro Gudwin

Revista Médica de Minas Gerais ISSN: 0103-880X

Set-2010 pp:33-33

Abstract: A idéia de se construir um agente computacional

consciente é bastante ousada, tanto do ponto de vista científico

como filosófico, principalmente porque a própria natureza do

que é esse fenômeno -"consciência" ainda se encontra cercada

de muitas dúvidas e problemas.Apesar disso, nos últimos

quinze anos tem havido um crescimento significativo no estudo

científico da consciência. Uma vertente tecnológica destes

estudos é a área de pesquisas em consciência artificial. Diversos

pesquisadores apresentaram propostas bastante diferentes entre

si para a criação de sistemas artificiais conscientes. Dentre as

diversas propostas, e ignorando aquelas que poderiam ser

classificadas como "ingênuas", a que nos parece mais

solidamente lastreada em uma sólida teoria científica da

consciência é o framework computacional sendo desenvolvido

por Stan Franklin, da Universidade de Memphis, nos USA, que

é baseada no modelo de consciência de Bernard Baars, também

conhecido como a Teoria do Espaço de Trabalho Global

(Global Workspace Theory). Lastreado sob o ponto de vista

científico pela teoria de Baars, Franklin desenvolveu, sob uma

perspectiva tecnológica, um framework computacional que

pode ser classificado, ao mesmo tempo, como uma prova de

conceito de uma teoria científica e uma nova abordagem para a

construção de agentes inteligentes. Nesta apresentação,

pretendemos analisar e avaliar a arquitetura que chamamos aqui

de arquitetura Baars-Franklin (ABF), uma arquitetura que vem

sendo desenvolvida conjuntamente por Baars e Franklin nos

últimos 10 anos.Baars desenvolveu sua Teoria do Espaço de

Trabalho Global (TETG)inspirado na psicologia, e baseado em

testes empíricos advindos da ciência cognitiva e da

neurociência. A TETG é uma teoria unificada queagrega

diversas hipóteses anteriores sobre a mente e a consciência

humanas.Em sua teoria, Baars, postula que processos como

atenção, seleção deação, automatização do comportamento,

aprendizagem, meta-cognição, emoção e outras operações

cognitivas são implementadas por um grande número de

processadores especializados e inconscientes distribuídos

globalmente no cérebro (algo que Edelman classificaria como

"grupos neurais"). Cada processador é autônomo, eficiente, e

trabalha em paralelo e em alta velocidade. Para realizar suas

tarefas, cada processador necessita de um conjunto de recursos

(basicamente algum tipo de informação), e da mesma forma

gerará como resultado de sua atividade um outro conjunto de

recursos, depois de seu processamento.Processadores

especializados podem cooperar entre si, formando coalizões.

Esta cooperação se dá por meio do fornecimento dos recursos

necessários, por parte de um processador para que outro

processador possa executar suas tarefas. Desta forma, trocam

http://dx.doi.org/10.1080/00207179.2010.511274

54 Sinopse da FEEC

recursos escrevendo e lendo de lugares específicos em uma

memória de trabalho. Essas coalizões podem formar grandes

redes complexas, onde processadores fornecem informações a

outros processadores. Entretanto, dentro de uma coalizão, os

processadores só têm acesso a uma informação local. Podem

haver situações em que a informação necessária a um

processador não esteja disponível na própria coalizão. De forma

a tratar de situações como esta, implementando um sistema de

comunicação global entre todos os processadores, existe um

espaço de trabalho global, onde processadores podem realizar o

broadcast de seus requisitos a todos os outros processadores.

Podem haver situações também onde um processador pode

anunciar o tipo de recurso que gera, de forma que outros

processadores interessados possam tomar ciência e usufruir

destes recursos. Estes processadores podem então utilizar-se do

espaço de trabalho global para fazer o broadcast com essa

informação a todos os outros processadores. Nessa dinâmica de

broadcast, somente uma única coalizão pode escrever no espaço

de trabalho global em um determinado instante de tempo. De

forma a decidir qual coalizão terá esse privilégio, todo um

processo de competição entre processadores é disparado. Cada

processador possui um nível de ativação, que expressa a

urgência em obter uma determinada informação ou a

importância da informação que é capaz de gerar. O nível de

ativação de toda uma coalizão é a média dos níveis de ativação

de seus participantes. A cada instante de tempo, a coalizão com

o maior nível de ativação ganha o acesso ao espaço de trabalho

global. Uma vez que ganhe este acesso, todos seus

processadores passam a fazer o broadcast de suas requisições e

anúncios. Esse processo de broadcast permite a formação de

novas coalizões, e também a mudança em coalizões que já

estão funcionando.Para Baars, a consciência está relacionada

com o funcionamento do espaço de trabalho global. Os

processadores são normalmente inconscientes, tendo acesso

somente a informação local. Mas, em alguns casos, eles podem

precisar ou anunciar informação global, caso em que requisitam

acesso à consciência. Uma vez dentro da consciência, eles

podem efetuar o broadcast a todos os outros processadores. Este

é ocaso em que uma informação não-usual, urgente ou

particularmente relevante deve ser propagada ou requisitada.

Desta forma, o mecanismo de consciência provê um papel

integrativo e mobilizador. Além disso, o mecanismo de

consciência também pode ser útil quando tarefas automáticas

(inconscientes) não são capazes de lidar com uma situação em

particular, e portanto demandam uma estratégia especializada

para sua resolução. Coalizões executivas, especializadas em

resolver problemas podem ser recrutadas de tal forma a lidar

com estas situações especiais delegando problemas triviais a

outras coalizões inconscientes. Desta forma, a consciência age

como um filtro, recebendo somente informação emergencial ou

especialmente relevante.Inspirado na descrição de Baars de sua

teoria de consciência, e também em trabalhos anteriores na

literatura de computação, Franklin propôs um framework

computacional para um agente de software que implementa a

teoria de Baars em uma arquitetura computacional, a

ABF.Nosso intuito com essa palestra, é analisar a arquitetura

ABF, e entender o significado de "consciência" que pode ser

atribuído a essa arquitetura. Da mesma forma, apresentaremos

uma análise das potenciais vantagens que o uso dessa

arquitetura em um sistema computacional pode trazer.

Keywords: Consciência Artificial, Arquiteturas

Cognitivas, Cognição Artificial.

Developing a Consciousness-Based Mind for an Artificial Criature Ricardo Capitanio Martins da Silva, Ricardo Ribeiro Gudwin

Lecture Notes in Computer Science ISSN: 0302-9743 v:6404 Oct-2010 pp:122-132 doi: 10.1007/978-3-642-16138-4_13

Abstract: This work describes the application of the Baars-

Franklin Architecture (BFA), an artificial consciousness

approach, to synthesize a mind (a control system) for an

artificial creature. Firstly we introduce the theoretical

foundations of this approach for the development of a

conscious agent. Then we explain the architecture of our agent

and at the end we discuss the results and first impressions of

this approach.

Markov Jump Linear Systems and Filtering Through Network Transmitted Measurements Alim Pedro de Castro Gonçalves, André R. Fioravanti, José

Claudio Geromel

Signal Processing (Print) ISSN: 0165-1684 v:90 n:10 Oct-2010 pp:2842-2850 doi: 10.1016/j.sigpro.2010.04.007

Abstract: This paper addresses how several models available

for a measurement transmission network channel, like the

generalized Gilbert-Elliot, Fritchman or McCullough ones,

from a linear and time invariant plant to its filter can be

incorporated into the more general framework of Markov jump

linear systems filtering. Combined with transmission protocols

that allow package failure recognition, the particular concept of

cluster availability of the Markov modes becomes appealing.

Numerical examples are explored to show applicability of the

results. The design of the filter is done using linear matrix

inequalities (LMIs).

Keywords: Discrete-time Markov jump linear systems,

Network filtering, Linear matrix inequalities

Neural network ensembles: immune-inspired approaches to the diversity of components Rodrigo Pasti, Leandro Nunes de Castro Silva, Guilherme

Palermo Coelho, Fernando Jose Von Zuben

Natural Computing ISSN: 1567-7818 v:9 n:3 Sep-2010 pp:625-653 doi: 10.1007/s11047-009-9124-1

Abstract: This work applies two immune-inspired algorithms,

namely opt-aiNet and omni-aiNet, to train multi-layer

perceptrons (MLPs) to be used in the construction of ensembles

of classifiers. The main goal is to investigate the influence of

the diversity of the set of solutions generated by each of these

algorithms, and if these solutions lead to improvements in

performance when combined in ensembles. omni-aiNet is a

multi-objective optimization algorithm and, thus, explicitly

maximizes the components’ diversity at the same time it

minimizes their output errors. The opt-aiNet algorithm, by

contrast, was originally designed to solve single-objective

optimization problems, focusing on the minimization of the

output error of the classifiers. However, an implicit diversity

maintenance mechanism stimulates the generation of MLPs

with different weights, which may result in diverse classifiers.

The performances of opt-aiNet and omni-aiNet are compared

with each other and with that of a second-order gradient-based

algorithm, named MSCG. The results obtained show how the

different diversity maintenance mechanisms presented by each

algorithm influence the gain in performance obtained with the

use of ensembles.

Keywords: Ensembles of classifiers, Diversity of

components, Artificial immune systems, Multi-layer

perceptrons, Multi-objective optimization

On the cutting stock problem under stochastic demand Douglas José Alem, Pedro Augusto Munari, Marcos Nereu

Arenales, Paulo Augusto Valente Ferreira

Annals of Operation Research ISSN: 0254-5330 v:179 n:1 Sep-2010 pp:169-186 doi: 10.1007/s10479-008-0454-7

Abstract: This paper addresses the one-dimensional cutting

stock problem when demand is a random variable. The problem

is formulated as a two-stage stochastic nonlinear program with

recourse. The first stage decision variables are the number of

http://dx.doi.org/10.1007/978-3-642-16138-4_13

http://dx.doi.org/10.1016/j.sigpro.2010.04.007

http://dx.doi.org/10.1007/s11047-009-9124-1

http://dx.doi.org/10.1007/s10479-008-0454-7

Academic Bulletin of FEEC-Unicamp 55

objects to be cut according to a cutting pattern. The second

stage decision variables are the number of holding or

backordering items due to the decisions made in the first stage.

The problem’s objective is to minimize the total expected cost

incurred in both stages, due to waste and holding or

backordering penalties. A Simplex-based method with column

generation is proposed for solving a linear relaxation of the

resulting optimization problem. The proposed method is

evaluated by using two well-known measures of uncertainty

effects in stochastic programming: the value of stochastic

solution—VSS—and the expected value of perfect

information—EVPI. The optimal two-stage solution is shown

to be more effective than the alternative wait-and see and

expected value approaches, even under small variations in the

parameters of the problem.

Keywords: Cutting stock problems, Stochastic

programming, Linear optimization, Column generation

Performance comparasion of artificial neural networks and expert systems applied to flow pattern identificdation in vertical ascendant gas-liquid flows Eugênio Spanio Rosa, Ricardo Menezes Salgado, Takaaki

Ohishi, Niederauer Mastelari

International Journal of Multiphase Flow ISSN: 0301-9322 v:36 n:9 Sep-2010 pp:738-754 doi: 10.1016/j.ijmultiphaseflow.2010.05.001

Abstract: Instantaneous readouts of an electrical resistivity

probe are taken in an upward vertical air–water mixture. The

signals are further processed to render the statistical moments

and the probability density functions here used as objective

flow pattern indicators. A series of 73 experimental runs have

its flow pattern identified by visual inspection assisted by the

analyses of the void fraction’s trace and associated probability

density function. The flow patterns are classified into six

groups and labeled as: bubbly, spherical cap, slug, unstable

slug, semi-annular and annular. This work compares and

analyzes the performance of artificial neural networks, ANN,

and expert systems to flow pattern identification. The employed

ANNs are Multiple Layer Perceptrons, Radial Basis Functions

and Probabilistic Neural Network, with single and multiple

outputs. The performance is gauged by the percentage of right

identifications based on experimental observation. The analysis

is extended to clustering algorithms to assist the formation of

knowledge base employed during the learning stages of the

ANNs and expert systems. The performance of the following

clustering algorithms: self organized maps, K-means and Fuzzy

C-means are also tested against experimental data.

Keywords: Flow pattern recognition, Clustering

algorithms, Neural networks, Impedance sensor

Electronic, Micro-electronic, Opto-electronic

Characterization and breakdown of the electricity bill using custom smart meters: a tool for energy-efficiency programs Luís Fernando Caparroz Duarte, José Douglas Bertazzoni

Zambianco, Douglas Airoldi, Elnatan Chagas Ferreira, Jose

Antonio Siqueira Dias

International Journal of Circuits, Systems and Signal

Processing ISSN: 1998-4464 v:5 n:2 Dec-2010 pp:116-123

Abstract: Understanding and monitoring the electrical energy

use is fundamental to encourage consumers and small business

owners to implement energy-efficiency measures and,

therefore, to cut their energy bills significantly. This works

presents the design, development and implementation of an

electrical energy monitoring sensor network which can be

easily installed to measure and monitor the energy use of every

appliance in a house, presenting to the consumer a detailed

report of the energy spent by each electrical device (TV, lights,

showers, etc.). The measuring units and a coordinator form a

wireless network, which is capable of measuring the electrical

energy and recording the data of each home appliance in the

flash memory of the coordinator. The data stored in the

coordinator is sent (via a wireless connection) to a computer

where the analysis of the data is performed and a detailed report

of the energy breakdown is presented.

Keywords: PLC, Power meter, Sensor network, ZigBee

Fabrication and electrical performance of high-density arrays of nanometric silicon tips Edson José de Carvalho, Marco Antonio Robert Alves,

Edmundo da Silva Braga, Lucila Helena Deliesposte Cescato

Microelectronic Engineering ISSN: 0167-9317 v:67 n:12 Dec-2010 pp:2544-2548 doi: 10.1016/j.mee.2010.06.046

Abstract: We propose and demonstrate a simple and low cost

process for the fabrication of large area arrays of nanometric

silicon tips, for use as Field Emission Devices (FEDs). The

process combines Interference Lithography (IL) with isotropic

Reactive Ion Etching (RIE). Si tips with typical curvature

radius of 20 nm and height of 900 nm were recorded with a

periodicity of 1 μm (density of 106 tips/mm2) covering a

Silicon wafer of 2 in. The measurement of the electrical

performance of the arrays demonstrates the feasibility of the

association of these two techniques for recording Field

Emission Tips.

Keywords: Interference Lithography, Reactive Ion

Etching (RIE), Silicon tips, Field Emission Devices

In vivo preliminary evaluation of Bone-Microcrystalline and Bone-Nanocrystalline Diamond Interfaces Ana Amélia Rodrigues, Vitor Baranauskas, Helder José

Ceragioli, Alfredo Carlos Peterlevitz, William Dias Belangero

Diamond and Related Materials ISSN: 0925-9635 v:19 n:10 Oct-2010 pp:1300-1306 doi: 10.1016/j.diamond.2010.06.016

Abstract: Chemical vapor deposited diamond is a new

potential biomedical material which has the advantage of

chemical inertness, extreme hardness and low coefficient of

friction, among others. In orthopedics and maxillofacial

surgery, these properties could improve implant performance,

reducing metallic corrosion, particle wear, inflammatory

reactions and bone loss. In the present study, two types of

chemical vapor deposition (CVD) diamonds have been

analyzed: microcrystalline diamonds (MD) and nanocrystalline

diamonds (ND), both produced by hot-filament chemical vapor

deposition. The diamond tubes were previously characterized

by scanning electron microscopy (SEM), atomic force

microscopy (AFM) and Raman scattering spectroscopy (RSS).

The aim of this study was to verify the interface between bone

and MD and ND, surgically implanted in the femoral diaphysis

of Wistar rats, after 4 and 8weeks. The outcome was evaluated

by scanning electron and optical microscopy using a semi

quantitative method. The results suggest that nanocrystalline

diamonds (ND) elicits a richer biological response than

microcrystalline diamonds (MD) when in interaction with bone.

Keywords: Chemical vapor deposited diamond,

Biomaterials, Implants, Bone prostheses

Nano-Ni addition to MgB2: effects on the superconducting properties Oscar de Lima, Kleber Betini Vieira, V.P.S. AWANA, H.

Kishan, Edson Moschim

Journal of Materials Science ISSN: 4895-5134 v:45 n:18 Sep-2010 pp:4929-4933 doi: 10.1007/s10853-010-4388-5

Abstract: Samples of MgB2 pure phase, with Ni nanoparticles

addition, were prepared using a solid diffusion reaction method.

Clearly, the Ni nanoparticles act as effective pinning centers

http://dx.doi.org/10.1016/j.ijmultiphaseflow.2010.05.001

http://dx.doi.org/10.1016/j.mee.2010.06.046

http://dx.doi.org/10.1016/j.diamond.2010.06.016

http://dx.doi.org/10.1007/s10853-010-4388-5

56 Sinopse da FEEC

and enhance the critical current density values, especially for a

sample with 0.5%Ni. A negligible amount of Ni diffuses inside

the MgB2 grains, thus having a small effect on the transition

temperature, which remains around 37.5 K.

Optical Amplitude Modulation Extinction by a Deep Saturated Ultra-Long Semiconductor Optical Amplifier Napoleão S. Ribeiro, André L. R. Cavacalcante, Cristiano M.

Gallep, Evandro Conforti

Optics Express ISSN: 1094-4087 v:18 n:26 Dec-2010 pp:27298-27305 doi: 10.1364/OE.18.027298

Abstract: The recovery of an optical carrier with the deletion

of its amplitude modulation is introduced using a deeply

saturated ultra-long semiconductor optical amplifier (UL-SOA).

The experimental results were achieved for input signal bit

rates up to 12.5 Gbps with high extinction ratio (up to 13.9 dB).

The influence of parameters such as UL-SOA bias current,

optical bandwidth, signal input power, modulation depth and

bit rate are analyzed including the carrier spectral broadening

effects due to the self-phase modulation effect.

Tridimensional Yagi antenna: shaping radiation pattern with a non-planar array Juliano Rodrigues Brianeze, Arismar Cerqueira Sodre Jr.,

Hugo Enrique Hernández Figueroa

IET Microwaves, Antennas & Propagation ISSN: 1751-8725 v:4 n:9 Sep-2010 pp:1434-1441 doi: 10.1049/iet-map.2009.0480

Abstract: This work presents the concept and development of

the tridimensional Yagi antenna, which is a novel type of Yagi

antenna operating in P band. It is idealised from two other types

of Yagi antennas: Quasi-Yagi and Yagi-Uda. The resultant

antenna is based on a microstrip balun, as in the first, and its

driver and directors are made from metal tubes, as in the

second, both integrated to a reflecting plane. The key point of

this new antenna model is its asymmetric and reconfigurable

radiation pattern and therefore the possibility of a high rejection

between sectors in a plane. This feature was accomplished with

the new concept of progressive rotation of directors around the

driver. The authors present a design methodology to adjust

return loss and radiation pattern characteristics. The final

prototype presents 9.4 dB gain at 450 MHz and 47% bandwidth

centred at 425 MHz.

Keywords: tridimensional Yagi antenna, radiation

pattern, nonplanar antenna array, quasi Yagi antenna,

Yagi-Uda antenna, microstrip balun, gain 9.4 dB,

frequency 450 MHz, bandwidth 425 MHz

Biomedical Engineering

Functional antagonism of β-adrenoceptor subtypes in the catecholamine-induced automatism in rat myocardium D.C. Boer, José Wilson Magalhães Bassani, Rosana Almada

Bassani

British Journal of Pharmacology ISSN: 1476-5381

Nov-2010 doi: 10.1111/j.1476-5381.2010.01121.x.

Abstract: Background and purpose. Myocardial automatism

and arrhythmias may ensue during strong sympathetic

stimulation. We sought to investigate the relevant types of

adrenoceptor, as well as the role of phosphodiesterase (PDE)

activity, in the production of catecholaminergic automatism in

atrial and ventricular rat myocardium. Experimental approach.

The effects of adrenoceptor agonists on the rate of spontaneous

contractions (automatic response) and the amplitude of

electrically-evoked contractions (inotropic response) were

determined in left atria and ventricular myocytes isolated from

Wistar rats. Key results. Catecholaminergic automatism was

Ca(2+) -dependent, as it required a functional sarcoplasmic

reticulum to be exhibited. Although both á- and â adrenoceptor

activation caused inotropic stimulation, only β(1) adrenoceptors

seemed to mediate the induction of spontaneous activity.

Catecholaminergic automatism was enhanced and suppressed

by β(2) adrenoceptor blockade and stimulation, respectively.

Inhibition of either PDE3 or PDE4 (by milrinone and rolipram,

respectively) potentiated the automatic response of myocytes to

catecholamines. However, only rolipram abolished the

attenuation of automatism produced by β(2) adrenoceptor

stimulation. Conclusions and Implications. α- and β(2) -

adrenoceptors do not seem to be involved in the mediation of

catecholaminergic stimulation of spontaneous activity in atrial

and ventricular myocardium. However, a functional antagonism

of β(1) - and β(2) adrenoceptor activation was identified, the

former mediating catecholaminergic myocardial automatism,

and the latter attenuating this effect. Results suggest that

hydrolysis of cAMP by PDE4 is involved in the protective

effect mediated by β(2) adrenoceptor stimulation.

Keywords: arrhythmias, PDE, β(2) adrenoceptors

Wrist Movement Characterization by Mechanomyography Technique Eduardo Mendonça Scheeren, Eddy Krueger, Guilherme

Nogueira, Percy Nohama, Vera Lucia da Silveira Nantes

Button

Journal of Medical and Biological Engineering ISSN: 1609-0985 v:30 n:6 Sep-2010 pp:373-380 doi: 10.5405/jmbe.757

Abstract: Mechanomyography (MMG) monitors the

oscillations caused by muscle contraction. Muscle contractions

generate motion artifacts which can significantly affect signal

processing of MMG. In order to avoid such interference during

signal analysis, one can respect a time delay (TD) after the

onset of contraction (OC). This study aimed to identify wrist

antagonist movements from signals recorded with MMG

sensors. The distinction was performed after evaluating the

correlation between windows of interest in signals between 0.2

s after OC (0.2 AOC) and 1.0 s after OC (1.0 AOC). Twelve

volunteers performed concentric wrist contractions: flexion and

ulnar deviation (inner side) and extension and radial deviation

(outer side). Two triaxial MMG sensors were placed on the

inner and outer sides of the forearm. The features used in the

analysis of MMG signals were root mean square (RMS),

number of zero-crossings, peak counting and the multiplication

RMS times number of zero-crossings (RZ). Two analysis

window lengths (0.25 s and 0.5 s) were evaluated. ANOVA

tests indicated that flexion was different from extension, ulnar

and radial deviation, and radial deviation was different from

ulnar deviation and flexion. The results suggest that it is

possible to identify whether the movements are antagonistic

and to distinguish movements from the same side. There were

strong correlations between the acquired signals and TD,

mainly the devised RZ feature (0.81~0.95). This study

proposed an approach to determine whether triaxial MMG

features can be used for motor prosthesis control. The triaxial

modulus presented strong correlations for all movements and

can be useful in future applications.

Keywords: TAccelerometer, Prosthesis control, Upper

limb

Computer Engineering

Watershed from propagated markers: An interactive method to morphological object segmentation in image sequences Franklin César Flores, Roberto de Alencar Lotufo

Image and Vision Computing ISSN: 0262-8856 v:28 n:11 Nov-2010 pp:1491-1514 doi: 10.1016/j.imavis.2009.06.015

Abstract: In this paper, it is introduced an interactive method

to object segmentation in image sequences, by combining

http://dx.doi.org/10.1364/OE.18.027298

http://dx.doi.org/10.1049/iet-map.2009.0480

http://dx.doi.org/10.1111/j.1476-5381.2010.01121.x.

http://dx.doi.org/10.5405/jmbe.757

http://dx.doi.org/10.1016/j.imavis.2009.06.015


classical morphological segmentation with motion estimation –

the watershed from propagated markers. In this method, the

objects are segmented interactively in the first frame and the

mask generated by its segmentation provides the markers that

will be used to track and segment the object in the next frame.

Besides the interactivity, the proposed method has the

following important characteristics: generality, rapid response

and progressive manual edition. This paper also introduces a

new benchmark to do quantitative evaluation of assisted object

segmentation methods applied to image sequences. The

evaluation is done according to several criteria such as the

robustness of segmentation and the easiness to segment the

objects through the sequence.

Keywords: Morphological segmentation, Image

sequences, Marker propagation, Motion estimation,

Watershed from markers, Interactive segmentation

Electrical Energy

Artificial neural networks for load flow and external equivalents studies Heloisa H. Müller, Marcos Julio Rider Flores, Carlos Alberto

de Castro Jr.

Electric Power Systems Research (Print) ISSN: 0378-7796 v:80 n:9 Sep-2010 pp:1033-1041 doi: 10.1016/j.epsr.2010.01.008

Abstract: In this paper an artificial neural network (ANN)

based methodology is proposed for (a) solving the basic load

flow, (b) solving the load flow considering the reactive power

limits of generation (PV) buses, (c) determining a good quality

load flow starting point for ill-conditioned systems, and (d)

computing static external equivalent circuits. An analysis of the

input data required as well as the ANN architecture is

presented. A multilayer perceptron trained with the Levenberg–

Marquardt second order method is used. The proposed

methodology was tested with the IEEE 30- and 57-bus, and an

ill-conditioned 11-bus system. Normal operating conditions

(base case) and several contingency situations including

different load and generation scenarios have been considered.

Simulation results show the excellent performance of the ANN

for solving problems (a)–d).

Keywords: Artificial neural networks, Load flow,

Reactive power limits of generation buses, Load flow

with step size optimization, Static external equivalents

Implementation and Performance Evaluation of a Reclosing Method for Shunt Reactor Comensated Transmission Lines Patricia Mestas, Maria Cristina Tavares, Aniruddha M. Gole

IEEE Transactions on Power Delivery ISSN: 0885-8977

Dec-2010 pp:1-6 doi: 10.1109/TPWRD.2010.2084111

Abstract: This paper proposes a new control method to reduce

overvoltages due to three-phase reclosing for shunt

compensated transmission lines (TL). The method detects the

first minimum voltage region of the beating across the circuit

breakers after protection dead time and works independently of

voltage zero crossing, reducing significantly the reclosure time.

The controller was tested on a Real Time Digital Simulator

(RTDS) and its performance was compared to the traditional

preinsertion resistor approach and another existing control

method.

Keywords: Controlled switching, electromagnetic

transients, switching overvoltages, three-phase reclosing,

transmission lines.

Influence of Accurate Soil Representation for Transmission-Line Parameters: Analyses Based on Carson’s Modified Formulations João Bosco Gertrudes, Maria Cristina Dias Tavares, Carlos

Manuel Portela

Revista IEEE América Latina ISSN: 1548-0992 v:7 n:2 Nov-2010 pp:1-8

Abstract: In this paper the influence of earth’s conductivity

and permittivity frequency dependence are evaluated when

calculating transversal and longitudinal transmission lines’

parameters directly from numerical integration of Carson’s

modified expressions. As an example of the importance of

properly considering the frequency-dependent soil model, an

actual 440 kV single three-phase transmission-line was

represented, comparing the longitudinal and transversal

parameters considering the earth’s conductivity and permittivity

frequency dependence soil model in relation to the common

soil representation with a constant conductivity and permittivity

that can be neglected assuming a low frequency approximation.

Keywords: Soil model, Line parameters, Frequency

dependence, Electromagnetic transients.

Um Controlador de corrente de carga para o conversor em matriz trifásico-trifásico e para inversor de frequência sem capacitor do elo de corrente contínua Milton Evangelista de Oliveira Filho, Alfeu Joãozinho Sguarezi

Filho, Jonas Rafael Gazoli, Ernesto Ruppert Filho

SBA - Controle & Automação ISSN: 0103-1759 v:21 n:5 Set-2010 pp:534-545 doi: 10.1590/S0103-17592010000500007

Abstract: A Controller for the Three-Phase to Three-Phase

Matrix Converter and for the Voltage Source Three-Phase

Inverter Without DC-Link Capacitor

Voltage source three-phase inverter plays an important role in

modern industry. The conventional voltage source inverter has

a large electrolytic capacitor as energy store element in order to

keep the DC-link voltage constant. However, a large

electrolytic capacitor increases the input current distortion.

Replacing the large electrolytic capacitor by a small film

capacitor, the input current quality is improved but the DC-link

voltage and the output currents are distorted by low order

harmonic components.

The three phase to three phase matrix converter performs

electric energy direct transfer from the input to the output with

sinusoidal input current although the distortion and the

unbalance of the input voltages affects directly the output of the

matrix converter.

This paper proposes a load current control method to the matrix

converter and also to the voltage source inverter in absence of

the dc-link capacitor in order to compensate the distortion

caused by low order harmonics components in the output

currents. The proposed load current control scheme employs

just one PI controller and since that the space vector modulation

is used in this control, the switching frequency of the converter

is kept constant. Theorical foundation, simulations results and

experimental results are presented.

Keywords: matrix converter, voltage source inverter,

modulation index, current control, bidirectional switch,

space vector, input filter.

Telecommunication and Telematic

Blind turbo receivers with fast least-squares channel estimation and soft-feedback equalisation Murilo Bellezoni Loiola, Renato da Rocha Lopes, João Marcos

Travassos Romano

Electronics Letters ISSN: 0013-5194 v:46 n:21 Oct-2010 pp:1464 - 1465 doi: 10.1049/el.2010.1819

http://dx.doi.org/10.1016/j.epsr.2010.01.008

http://dx.doi.org/10.1109/TPWRD.2010.2084111

http://dx.doi.org/10.1590/S0103-17592010000500007

http://dx.doi.org/10.1049/el.2010.1819

58 Sinopse da FEEC

Abstract: Low-complexity blind turbo receivers composed of

a soft-feedback equaliser (SFE) and fast least-squares (FLS)

channel estimators are proposed. To reduce the complexity of

the SFE computation, a function approximation is proposed

instead of numerical algorithms in a specific step of the

equaliser's computation. Concerning FLS channel estimators, a

specific filter parameters initialisation procedure is proposed in

each turbo iteration to avoid possible numerical instabilities.

Estimation of noise variance is also considered. The proposed

scheme can perform as the turbo equaliser with perfect channel

knowledge from a certain signal-to-noise ratio.

Keywords: fast least-squares channel estimation,

function approximation, low-complexity blind turbo

receivers, noise variance estimation, numerical

algorithms, signal-to-noise ratio, soft-feedback

equalisation, turbo iteration

Construction of new families of nonbinary CSS codes Giuliano Gadioli La Guardia, Reginaldo Palazzo Junior

Discrete Mathematics ISSN: 0012-365X v:310 n:21 Nov-2010 pp:2935-2945 doi: 10.1016/j.disc.2010.06.043

Abstract: New families of good q-ary (q is an odd prime

power) Calderbank–Shor–Steane (CSS) quantum codes derived

from two distinct classical Bose–Chaudhuri–Hocquenghem

(BCH) codes, not necessarily self-orthogonal, are constructed.

These families consist of CSS codes whose parameters are

better than the ones available in the literature and comparable to

the parameters of quantum BCH codes generated by applying

the q-ary Steane’s enlargement of CSS codes.

Keywords: Cyclotomic cosets, Bose–Chaudhuri–

Hocquenghem (BCH) codes, Calderbank–Shor–Steane

(CSS) codes

Diffraction-Attenuation Resistant Beams: their Higher Order VErsions and Finite-Aperture Generations Michel Zamboni Rached, Leonardo André Ambrósio, Hugo

Enrique Hernandez Figueroa

Applied Optics ISSN: 1540-8973 v:49 n:30 Oct-2010 pp:5861-5869 doi: 10.1364/AO.49.005861

Abstract: Recently, a method for obtaining diffraction–

attenuation resistant beams in absorbing media has been

developed in terms of suitable superposition of ideal zero-order

Bessel beams. In this work, we show that such beams keep their

resistance to diffraction and absorption even when generated by

finite apertures. Moreover, we shall extend the original method

to allow a higher control over the transverse intensity profile of

the beams. Although the method is developed for scalar fields,

it can be applied to paraxial vector wave fields, as well. These

new beams have many potential applications, such as in free-

space optics, medical apparatus, remote sensing, and optical

tweezers.

Keywords: Laser beam shaping, Diffraction theory,

Waves

Efficient Calculation of Higher-Order Optical Waveguide Dispersion José Amilton Mores Junior, Gilliard Nardel Malheiros Silveira,

Hugo Luis Fragnito, Hugo Enrique Hernandez Figueroa

Optics Express ISSN: 1094-4087 v:18 n:19 Sep-2010 pp:19522-19531 doi: 10.1364/OE.18.019522

Abstract: An efficient numerical strategy to compute the

higher-order dispersion parameters of optical waveguides is

presented. For the first time to our knowledge, a systematic

study of the errors involved in the higher-order dispersions’

numerical calculation process is made, showing that the present

strategy can accurately model those parameters. Such strategy

combines a full-vectorial finite element modal solver and a

proper finite difference differentiation algorithm. Its

performance has been carefully assessed through the analysis of

several key geometries. In addition, the optimization of those

higher-order dispersion parameters can also be carried out by

coupling to the present scheme a genetic algorithm, as shown

here through the design of a photonic crystal fiber suitable for

parametric amplification applications.

Keywords: Numerical approximation and analysis,

Parametric oscillators and amplifiers, Waveguides,

Dispersion, Photonic crystal fibers

Gradient Forces on Double-Negative Particles in Optical Tweezers using Bessel Beams in the Ray Optics Regime Hugo Enrique Hernandez Figueroa, Leonardo André Ambrósio

Optics Express ISSN: 1094-4087 v:18 n:23 Nov-2010 pp:24287-24292 doi: 10.1364/OE.18.024287

Abstract: Gradient forces on double negative (DNG) spherical

dielectric particles are theoretically evaluated for v-th Bessel

beams supposing geometrical optics approximations based on

momentum transfer. For the first time in the literature,

comparisons between these forces for double positive (DPS)

and DNG particles are reported. We conclude that, contrary to

the conventional case of positive refractive index, the gradient

forces acting on a DNG particle may not reverse sign when the

relative refractive index n goes from |n| > 1 to |n| < 1, thus

revealing new and interesting trapping properties.

Keywords: Geometric optics, Left-handed materials,

Metamaterials, Optical tweezers or optical manipulation

Luminescence of PbS quantum dots spread on the core surface of a silica microstructured optical fiber E. F. Chilcce, Roddy Elky Ramos Gonzales, C. M. B. Cordeiro,

Luis Enrique Gutierrez Rivera, Hugo Luis Fragnito, Carlos

Henrique de Brito Cruz, Aldario Chrestani Bordonalli, Hugo

Enrique Hernandez Figueroa, R.L. Braga, Luiz Carlos Barbosa

Journal of Non-Crystalline Solids ISSN: 0022-3093 v:356 n:44 Oct-2010 pages:2397–2401 doi: 10.1016/j.jnoncrysol.2010.03.025

Abstract: The broadband luminescence spectra, in the region

from around 1000 to 1650 nm, of lead sulphide (PbS) quantum

dots (QDs) spread onto the dual core surfaces of silica

microstructured optical fibers (MOFs) (core diameters of not,

vert, similar 2.5 and not, vert, similar 5.0 µm) are reported. For

this purpose, colloidal solutions of PbS QDs of different sizes

with luminescence bands around 877 (PbS877), 1160

(PbS1160), and 1474 nm (PbS1474) were injected and then

spread onto the dual core surfaces of silica MOFs using a

nitrogen gas pressure system. The PbS QDs were excited (via

evanescent field effect) by the light of a continuum wave

semiconductor laser or a Ti:sapphire laser (at 785 nm) guided

through the MOF cores. As an important result, blue-shift and

the band broadening behaviors in the luminescence spectra of

these PbS QDs were observed.

Keywords: Microstructured optical fiber, Luminescence,

Lead sulphide, Quantum dots, Evanescent field effect

Modeling Interference in Wireless Ad Hoc Networks Paulo Cardieri

IEEE Communications Surveys and Tutorials ISSN: 1553-877X v:12 n:4 Nov-2010 pp:551 - 572 doi: 10.1109/SURV.2010.032700096

Abstract: The recent increasing interest in ad hoc networks

has motivated the study and development of interference

models capable of capturing the intrinsic characteristics of this

kind of network, such as the lack of a central coordination and

the consequent distributed nature of some of the network

http://dx.doi.org/10.1016/j.disc.2010.06.043

http://dx.doi.org/10.1364/AO.49.005861

http://dx.doi.org/10.1364/OE.18.019522

http://dx.doi.org/10.1364/OE.18.024287

http://dx.doi.org/10.1016/j.jnoncrysol.2010.03.025

http://dx.doi.org/10.1109/SURV.2010.032710.00096


functions (e.g., medium access control and routing protocols).

As a consequence, a myriad of interference models for ad hoc

networks can be found in the literature, that describes the

effects of interference at different layers and with different

levels of detail. Some of these models describe interference as a

random process whose statistics depend mainly on physical

layer parameters, and are better suited for the analysis of issues

related to the physical layer. Other models focus on the effects

of interference at higher layers, and are more appropriate when

the analysis of network-related issues is of interest. This paper

presents a comprehensive survey of interference models for

wireless ad hoc networks, emphasizing their domains of

application, illustrated with examples. The interference models

are presented in this survey from the perspective of the radio

capture phenomenon, resulting in a unified view of interference

models, which may be helpful when selecting the appropriate

model for a given purpose.

Keywords: α-stable distribution-stable distribution,

interference graphs, interference models, spatial point

process, wireless ad hoc networks, wireless network

models

New Classes Of Topological Quantum Codes Associated With Self-Dual, Quasi Self-Dual And Denser Tessellations C. D. Albuquerque, Reginaldo Palazzo Jr., E. B. Silva

Quantum Information & Computation ISSN: 1533-7146 v:10 n:11 Nov-2010 pp:956-970

Abstract: In this paper we present six classes of topological

quantum codes (TQC) on compact surfaces with genus g ≥ 2.

These codes are derived from self-dual, quasi self-dual and

denser tessellations associated with embeddings of self-dual

complete graphs and complete bipartite graphs on the

corresponding compact surfaces. The majority of the new

classes has the self-dual tessellations as their algebraic and

geometric supporting mathematical structures. Every code

achieves minimum distance 3 and its encoding rate is such that

k/n → 1 as n → ∞, except for the one case where k/n → 1/3 as

n → ∞.

Keywords: Topological quantum codes, Quantum error-

correcting codes, Surface codes, Tessellations.

Power Correlation Coefficient of a Very General Fading Model in Maximal Ratio Combining José Ricardo Mendes, Michel Daoud Yacoub, Ugo Silva Dias

IEEE Transactions on Communications ISSN: 0090-6778 v:58 n:9 Sep-2010 pp:2472-2479 doi: 10.1109/TCOMM.2010.09.090257

Abstract: A very general fading scenario is considered for

which exact, closed-form formulas for the correlation

coefficient of the instantaneous power at the output of a

Maximal Ratio Combining receiver is derived. The model

includes the main fading environments as very particular cases.

It is valid for both identically and non-identically distributed

multipath clusters, and for both stationary and nonstationary

environments. Most interestingly, the model allows for an

uncountable number of combinations of novel fading scenarios.

A further generalization is achieved with the angle as well as

the time of arrival of the waves permitted to vary throughout

the multipath clusters, as opposed to known models for which

these parameters are fixed. Several particular examples

illustrate the applicability of the general formulations.

Keywords: η-μ distribution, κ-μ distribution, Correlation

coefficient, Hoyt distribution, Nakagami-m distribution,

Rayleigh distribution, Rice distribution, fading model,

maximal ratio combining

Richards growth model and viability indicators for populations subject to interventions Selene Loibel, Marinho G. Andrade, João Bosco Ribeiro do

Val, Alfredo R. de Freitas

Anais da Academia Brasileira de Ciências (Annals of the

Brazilian Academy of Sciences) ISSN: 0001-3765 v:82 n:4 Dec-2010 pp:1107-1126 doi: 10.1590/S0001-37652010000400028

Abstract: In this work we study the problem of modeling

identification of a population employing a discrete dynamic

model based on the Richards growth model. The population is

subjected to interventions due to consumption, such as hunting

or farming animals. The model identification allows us to

estimate the probability or the average time for a population

number to reach a certain level. The parameter inference for

these models are obtained with the use of the likelihood profile

technique as developed in this paper. The identification method

here developed can be applied to evaluate the productivity of

animal husbandry or to evaluate the risk of extinction of

autochthon populations. It is applied to data of the Brazilian

beef cattle herd population, and the the population number to

reach a certain goal level is investigated.

Keywords: Richards growth model, population risk,

harvested populations, parametric estimate, likelihood

profile function.

Article in proceedings

Automation

A Consciousness-Based Control System for a Simulated Autonomous Vehicle Ricardo Capitanio Martins Da Silva, Ricardo Ribeiro Gudwin

In: XVIII Congresso Brasileiro de Automática (CBA 2010)-

Antonio Padilha Feltrin(Ed.) - ISBN: 978-85-61507-02-2

SBA - Sociedade Brasileira de Automática – Bonito(MS) -

Brasil Sep-2010 pp:1648-1655

Abstract: This work describes the application of the Baars-

Franklin Architecture (BFA), an artificial consciousness

approach, to synthesize a control system for an autonomous

vehicle. The BFA was reported in the literature as a successful

control system to different kinds of agents: CMattie, IDA and

CTS. In this paper, BFA is for the first time applied for

controlling an autonomous vehicle. Firstly we introduce the

theoretical foundations of this approach for the development of

a conscious agent. Then we explain the architecture of our

agent and at the end we discuss the results and first impressions

of this approach.

Keywords: artificial consciousness, intelligent systems,

autonomous vehicle, multi-agent systems

Análise de Estabilidade e Controle H∞ de Sistemas Lineares com Atraso Rubens H. Korogui, André R. Fioravanti, José C. Geromel




Brasil Set-2010 pp:4038-4043

Abstract: This paper aims at introducing a linear time

invariant comparison system for stability analysis and ∞ control

design of time-delay systems. A 2n-th order rational system,

called comparison system, is defined and is associated to a

time-delay system with n state variables in such a way that

stability analysis and H∞ control design of the comparison

system are strongly related to those of the time-delay system. In

this paper, the state feedback control design is used to show the

potentialities of the proposed methodology.

Keywords: Time-delay systems, H∞ control design,

linear systems, numerical methods

Avaliação de modelos de ativos financeiros com vistas a otimização de carteiras multi-período João Bosco Ribeiro do Val, André Schonardie Pasqual



http://dx.doi.org/10.1109/TCOMM.2010.09.090257

http://dx.doi.org/10.1590/S0001-37652010000400028

60 Sinopse da FEEC


Brasil Set-2010 pp:818-823

Abstract: This article presents a study of identification of

stochastic models from historical time series of assets traded in

the Brazilian stock exchange (Ibovespa). A procedure to

investigate the fitting of some models and the validation of

them is presented. It seeks the extraction of well adjusted

models from the time series, with a view to provide a

methodology for application in control and multi-period

optimization. The main contribution is the creation of a more

realistic scenario for the problem of multi-period optimization

and control of economics and financial systems. The

methodology here will be applied into a numeric problem

containing real dada of the stock exchange, and the results will

be presented and discussed.

Keywords: Stochastic models, System identification,

time series.

Cálculo do Espectro de Lyapunov via Dinâmicas Clonadas e sua Aplicação no Circuito de Chua Filipe Ieda Fazanaro, Diogo Coutinho Soriano, Marconi Kolm

Madrid, Ricardo Suyama, Romis Ribeiro De Faissol Attux, Jose

Raimundo De Oliveira




Brasil Sep-2010 pp:2511-2518

Abstract: This work presents a methodology to evaluate the

Lyapunov spectrum based on local divergence of nearby orbits

in the phase space. The local divergence rate is evaluated by the

difference of final states achieved by the original solution of the

system and copies (clones) disturbed from an infinitesimal of

the original system. This algorithm presents the advantage of

calculating the local Lyapunov exponents by using only the

state equations, that is, it does not require the linearization of

the dynamics, being suitable for applications in non-smooth

systems. Thus, this work presents several numerical

experiments for validating the proposed method both for

continuous- and discrete-time dynamical systems, and

illustrates its application to the Chua oscillator, which is a

classical paradigm in the study of chaotic systems.

Keywords: Chaos, Lyapunov exponents, Non-smooth

systems, Chua’s Circuit

Cognição, Sistemas Complexos e Linguagem: A Interpretação Objetiva do Ambiente como Requisito para Aquisição de Linguagem Gramatical em Sistemas Artificiais Ricardo Ribeiro Gudwin

In: XL Reunião Anual da Sociedade Brasileira de Psicologia - ISBN: 21765243

Curitiba, Paraná Out-2010 pp:1-6

Abstract: Existem vários experimentos referentes ao

desenvolvimento das relações simbólicas e sobre auto-

organização e emergência de vocabulários comuns e da

linguagem simples (real ou virtual). No entanto, várias questões

ainda estão em aberto, especialmente no tocante a processos

complexos, a condições necessárias e/ou suficientes para o

surgimento de relações semióticas e a pressupostos

experimentais e suas conexões com evidências teóricas e

empíricas. A emergência de linguagem pode ser vista como o

ápice de uma sequência de processos que começam com signos

mais elementares, como os ícones e os índices, e por meio de

uma sequência sucessiva de signos mais complexos chega à

emergência do símbolo. Diversos estudos na literatura tentam

recriar sinteticamente esses processos para emergência de

linguagem, muitas vezes fazendo oque se chama do

"grounding" dos símbolos em sinais oriundos de sensores e

atuadores, em criaturas artificiais. As criaturas artificiais,

aprendendo e usando esses sinais, comportam-se coletivamente

como um sistema complexo adaptativo, onde a auto-

organização das interações comunicativas desempenham um

papel importante no surgimento de uma comunicação baseada

em símbolos. Neste trabalho, pretendemos analisar a hipótese

teórica de que, para promover a associação entre sinais de

sensores e atuadores a um repertório de símbolos, é necessário

entretanto, a criação de uma etapa intermediária, onde esses

sinais sensório-motores precisam ser traduzidos no que

poderíamos chamar de uma interpretação objetiva do ambiente

ou, em outras palavras, uma segmentação e modelagem do

ambiente em termos de objetos e ações envolvendo objetos.

Essa etapa de tradução seria responsável por traduzir sinais de

uma ontologia sensório-motora para uma ontologia objetiva.

Posteriormente, uma outra tradução seria necessária para

traduzir os sinais dessa ontologia objetiva para uma ontologia

simbólica. Mais do que isso, para que a comunicação simbólica

possa emergir em sua plenitude, como na linguagem natural

humana, nossa hipótese é a de que as criaturas envolvidas

deveriam ter um processo de segmentação da realidade senão

idêntico, pelo menos similar, dentro de uma variância

controlada. Uma das limitações que as abordagens sintéticas de

emergência de linguagem atuais possuem é sua incapacidade de

ir além da emergência de significado para palavras isoladas.

Estudos sobre a emergência de "linguagem gramatical", com

frases completas são raros e inconclusivos. Nossa hipótese é a

de que a emergência da linguagem gramatical só será possível

após uma interpretação objetiva da realidade pelas criaturas

artificiais. Essa interpretação objetiva serviria como um ícone

intermediário da realidade, a ser posteriormente desenvolvido

para a emergência de símbolos dicentes (frases completas) e

argumentos (raciocínios). Nosso intuito é desenvolver essa

hipótese teórica, de forma a criar protocolos e experimentos

com criaturas artificiais onde o objetivo seria a emergência de

linguagem gramatical.

Computação Biogeográfica: Formalização e Proposição de uma Meta-Heurística Espaço-Temporal Rodrigo Pasti, Leandro Nunes De Castro Silva, Fernando Jose

Von Zuben




Brasil Sep-2010 pp:5065-5072

Abstract: This work presents the conceptual framework of a

spatial-temporal metaheuristic based on the principles and

theories of biogeography. This is an initiative of formalizing

what has been termed biogeographic computing, aiming at the

proposition of a new paradigm of optimization and search

algorithms, in which time and space have a core role in the

conduction of the involved processes. With the computational

implementation of concepts such as speciation, gene flow and

habitat, a proposal of population-based metaheuristic is

achieved, characterized by the promotion of processes which

are generally absent, when considered together, or which play a

subordinate role in alternative population meta-heuristics: (i)

automatic control of the population size; (ii) automatic control

of the number of species in the population; (iii) diversity

maintenance in the population; and (iv) multimodal search

capability. To illustrate the potential of biogeographic

computing, a meta-heuristic is implemented taking a subset of

the properly formalized biogeographic processes. Graphic

results in the context of multimodal optimization in continuous

spaces are presented and discussed.

Keywords: biogeography, population metaheuristics,

multimodal optimization in continuous spaces.

Contribuição Sobre a Gênese, o Presente e o Futuro da Engenharia Elétrica Gilmar Barreto, Paulo David Battaglin

In: COBENGE 2010

Fortaleza-CE-Brasil Set-2010 pp:1-3


Abstract: Este trabalho mostra a evolução do conhecimento

sobre a Engenharia Elétrica. As contribuições deste trabalho

procuram evidenciar os principais fatos que revelam os

benefícios desta evolução para a sociedade humana, através da

utilização da Eletricidade e do seu ensino. A Eletricidade está

em estado latente na natureza e seu potencial tem sido

descoberto e desenvolvido pelos seres humanos através dos

milênios. A sua utilização nos primórdios pelas civilizações

antigas, o desenvolvimento do conhecimento sobre ela e suas

aplicações elementares, bem como a descoberta da inter-relação

das várias formas de Eletricidade na natureza são exemplos

disto, e são abordados neste trabalho. Os fundamentos da

Engenharia Elétrica são a base do estado da arte e o seu ensino

estruturado tem cooperado para a formação rigorosa de

profissionais.

Keywords: Engenharia Elétrica, Primórdios,

Fundamentos, Ensino

Contributions Concerning to Beginnings, Present And Future Of the Eletrical Engineering Gilmar Barreto, Paulo David Battaglin

In: Proceedings of International Engineering Education

Conference - ISBN: 978-975-6707-28-9

Antalya, Turkey Nov-2010 pp:235-240

Abstract: This project presents the knowledge evolution

concerning the Electrical Engineering. The collaborations of

this project have the task to disclosure key realities that point

out benefits to human society, through the applications of

Electricity and its teaching. Electricity has been latent in nature

and human beings have discovered and developed its potential

through millenniums. Electricity utilization by ancient

civilizations in the beginnings, its basic knowledge

development and applications, as well as the interconnection

among Electricity’s shapes in nature are true examples of that,

and is covered in this project. Electrical Engineering

fundamentals have been some keystones to state of art. The

Electrical Engineering well endowed teaching has cooperated

for a build-up of high level graduated students. This project

presents also some statements about UNICAMP/FEEC’s

graduation course of Electrical Engineering, concerning the last

40 years of its life. The statements bring us relevant

information that allows some suggestions be presented in order

to improve this Electrical Engineering course outreach.

Keywords: Electrical Engineering, Beginnings,

Fundamentals, Education.

Controle genético não linear por realimentação de estado César Daltoé Berci, Celso Pascoli Bottura




Brasil Set-2010

Abstract: Control theory has been benefited from the

enormous development of digital computing and computational

intelligence to solve relatively complex problems through

means of computational methods. In the control theory of

nonlinear systems this relationship is even clearer. Because of

the complexity of these systems, it becomes virtually

impossible to treat most of them with traditional methods.

Within this context, this paper proposes the design of a

controller, based on genetic algorithms, which through a

particular approach to the control problem, applies an

evolutionary process to select the correct input to be applied to

the system in each sample time. Thus, a controller quite simple

and generally applicable to a wide range of nonlinear dynamic

systems is obtained.

Keywords: Intelligent Control, Nonlinear Systems,

Genetic Algorithms

Controle H∞ de Sistemas Lineares com Comutação Grace S. Deaecto, José C. Geromel, Jamal Daafouz




Brasil Set-2010

Abstract: This paper is devoted to dynamic output feedback

H∞ control design of continuous-time switched linear systems.

The main purpose is to jointly design a switching rule and a full

order dynamic switched controller depending only on the

measured output that render the associated closed-loop

switched linear system globally asymptotically stable and

impose a pre-specified upper bound to the L2 gain from the

exogenous input to the controlled output. The solution for the

stated control design problem is based on sufficient conditions

expressed in terms of Riccati-Metzler inequalities, that are

highly non-convex and, consequently, very difficult to solve.

However, they allow to derive simpler alternative conditions

that can be handled by means of any LMI solver coupled to a

line search. The key issue is the proposition of a necessary and

sufficient condition for the existence of a solution of the

Riccati-Metzler inequalities with a pre-specified structure. An

example of practical importance illustrates the theoretical

results.

Keywords: Switched systems, output feedback, linear

matrix inequalities.

Controle ótimo aplicado a inversores PWM: validação experimental de acordo com a norma IEC62040-3 e certificação de desempenho usando LMIs Vinícius Foletto Montagner, Samuel Polato Ribas, Humberto

Pinheiro, Ricardo Coracao de Leao F. de Oliveira




Brasil Sep-2010 pp:3121-3127

Abstract: This work presents the design and experimental

validation of a discrete linear quadratic regulator suitable to

control single phase PWM inverters with linear and nonlinear

loads, with results complying with IEC62040-3 Standard for

uninterruptible power supplies. The load is modelled here as a

disturbance of current, allowing to describe any type of load

and also to verify the closed-loop performance using standard

system norms. The control action is a linear combination of the

plant states and the states of an internal model principle based

controller, allowing to track sinusoidal reference signals in the

presence of load disturbances with harmonics. The controller is

implemented using a fixed point digital signal processor which

introduces constraints to the design as a delay in the application

of the control signal and also limitations on precision and

dynamic range of data representation. Differently from most

works dealing with the same plant, the performance of the

closed-loop system is certified here by means of convex

optimization problems measuring the system capacity of

rejection of diturbances. The experimental results obtained for a

prototype of 0.5kVA with 120V RMS, 60Hz with linear and

nonlinear loads prove that the output of the system complies

with IEC62040-3 Standard.

Keywords: PWM inverters, optimal control, digital

control, linear matrix inequalities, convex optimization.

Controle robusto descentralizado de sistemas não lineares com incertezas variantes no tempo limitadas em norma Marcus Pantoja da Silva, Celso Pascoli Bottura




Brasil Set-2010 pp:486-491

62 Sinopse da FEEC

Abstract: Nonlinear systems with norm bounded time-varying

uncertainties are investigated in this work. Conditions for

robust stability in the form of linear matrix inequalities for

designing robust control gain state feedback that the same time

stabilizes the system and maximizes the limit of uncertainty of

the non-linear term are established based on quadratic

Lyapunov functions and an procedure here propoded. The

conditions obtained are extended to a model of decentralized

control. Numerical examples are presented and compared with

results from the literature, highlighting the advantages of the

proposed methodology.

Keywords: Robust Control, Linear Matrix Inequalities,

Decentralized Robust Control, Robust Stabilization

Controle seletivo com critério H-2 de sistemas nebulosos Takagi-Sugeno Eduardo Stockler Tognetti, Pedro Luis Dias Peres, Ricardo

Coracao De Leao F De Oliveira




Brasil Sep-2010 pp:4118-4125

Abstract: This paper presents new results concerning the

design of state feedback controllers for continuoustime Takagi-

Sugeno (T-S) fuzzy systems via fuzzy Lyapunov functions. A

new modeling is proposed to represent the membership

functions of T-S fuzzy systems, with the Cartesian product of

simplexes, called multi-simplex. Linear matrix inequality

relaxations based on homogeneous polynomials matrices are

provided for controller design with an H2 guaranteed cost. The

time-derivatives of the membership functions are modeled as

belonging to a polytope, and the bounds of the variation rate are

taken into account in the model. As one of the main

contributions, the method allows to synthesize control gains

depending only on some premise variables, selected by the

designer. Numerical experiments illustrates the flexibility and

advantages of the proposed method.

Keywords: Takagi-Sugeno fuzzy systems, H2 control,

Continuous-time systems, Linear matrix inequalities.

Controle, sujeito a restrições, de sistemas lineares discretos com saltos markovianos e com ruídos multiplicativo e aditivo Walter Furloni, Jo˜ao Bosco Ribeiro do Val, Alessandro N.

Vargas




Brasil Set-2010 pp:2910-2917

Abstract: The purpose of this article is to present a simple

method to solve the problem of stochastic optimal constrained

control of discrete-time Markov jumps linear systems (MJLS)

with multiplicative and additive noises. Constraints appear on

system state and input control variables in terms of their first

two moments. A simple linear state feedback controller is

considered independently of the Markov state information

availability and it is determined by optimizing a quadratic

performance index. The solution is based on a numeric method

performing a variational search using LMI formulation.

Additionally, it is showed that the proposed methodology may

be applied to solve porfolio dynamic selection problems in

financial area, adding another tool to solve the classic problem

of mean × variance.

Keywords: Markov jump systems, multiplicative noise,

stochastic optimal constrained control, mean × variance

control, linear matrix inequalities

Decomposição de Dantzig-/wolfe para Problemas com Parâmetros Fuzzy Jussara Rodrigues Ciappina, Akebo Yamakami

In: XXXIII Congresso Nacional de Matemática Aplicada e

Computacional (CNMAC)

Aguas de Lindoia, SP Set-2010 pp:1-6

Abstract: Este trabalho apresenta uma proposta para resolver

problemas com parâmetros fuzzy baseada no método clássico

de decomposição de Dantzig-Wolfe. Métodos utilizando

técnicas de decomposição tratam problemas que apresentam

uma estrutura especial no conjunto das restrições. Um exemplo

com tal estrutura é o problema de fluxo multiproduto fuzzy. O

algoritmo proposto visa encontrar a solução ótima trabalhando

com o problema na forma fuzzy, durante todo procedimento de

resolução.

Keywords: Fuzzy, Otimização, Decomposição, Fluxo

Multiproduto Fuzzy

Design and experimental validation of a robust H-2 controller applied to a boost converter Vinícius Foletto Montagner, Luiz Antonio Maccari Junior,

Ricardo Coracao De Leao F De Oliveira




Brasil Sep-2010 pp:1549-1554

Abstract: This paper proposes the design and experimental

validation of a robust H2 control technique for a boost

converter. The design procedure adopts a linearized model of

the converter affected by time-varying uncertain parameters

with a polytopic structure. Using this model, an optimal H2

state feedback controller (under quadratic stability) is

synthesized through convex optimization based on linear matrix

inequalities. The control gains ensure closed-loop stability and

an H2 guaranteed cost for the entire set of uncertainties and

also for arbitrary parametric variation inside this set. A boost

converter of nominal power equal to 100W is used for the

design of the controller. The input voltage, the operating point

duty cycle and the load are considered as uncertain and

arbitrarily time-varying parameters. The control gains obtained

for this converter produce good simulation and experimental

results. The quality of the results is measured by means of fast

transient responses and small overshoots and undershoots on

the output voltage. The experimental validation prove the

viability of practical application of an H2 robust control

technique for this plant.

Keywords: Boost converter, robust control, optimal

control, convex optimization, linear matrix inequalities.

Evolving Arbitrarily Connected Feedforward Neural Networks via Genetic Algorithms Wilfredo Jaime Puma Villanueva, Fernando Jose Von Zuben

In: 11st Brazilian Symposium on Neural Networks - SBRN - ISBN: 978-0-7695-4210

São Bernardo do Campo-SP Oct-2010 pp:127-132

Abstract: Though several approaches have already been

proposed in the literature to evolve neural network topologies

for solving a wide range of machine learning tasks, this paper

presents an alternative one, capable of evolving arbitrarily

connected feedforward neural networks (ACFNNs), including

linear and nonlinear neurons. A genetic algorithm is conceived

to adjust the topology and also to perform variable selection.

The weights of the obtained neural networks, with arbitrary

topologies, are adjusted using a simple descent gradient

algorithm. The purpose is to obtain high-quality and

parsimonious predictors for two real-world and one synthetic

time series. The obtained results are compared with the ones

produced by traditional MLP models and Mixtures of

Heterogeneous Experts (MHEs).

Keywords: Neural networks, arbitrary architectures,

genetic algorithms


Filtragem de Medidas Transmitidas por Rede Usando Sistemas com Saltos Markovianos a Tempo Discreto Alim Gonçalves, André R. Fioravanti, José Geromel




Brasil Set-2010 pp:782 - 787

Abstract: This paper addresses how several models available

for a measurement transmission network channel, like the

generalized Gilbert-Elliot, Fritchman or McCullough ones,

from a linear and time invariant plant to its filter can be

incorporated into the more general framework of Markov Jump

Linear Systems filtering with partially known transition

probabilities. Combined with transmission protocols that allow

package failure recognition, the particular concept of cluster

availability of the Markov modes becomes appealing. An

example shows the applicability of the results. The design of

the filter is done using Linear Matrix Inequalities.

Keywords: Discrete-time Markov jump linear systems,

Network filtering, Linear matrix inequalities.

Filtragem robusta H2 e H∞ usando LMIs para sistemas incertos contínuos politópicos invariantes no tempo Márcio Júnior Lacerda, Pedro Luis Dias Peres, Ricardo





Brasil Sep-2010 pp:4110-4117

Abstract: This paper presents new linear matrix inequality

conditions for H2 and H∞ robust filter design for

continuoustime polytopic systems with time-invariant

uncertainty. Thanks to the use of a larger number of slack

variables, the proposed conditions are less conservative than the

existing conditions in the literature, containing recently

published results as particular cases. Examples illustrate the

better performance of the designed filters using the proposed

approach when compared to other methods for robust filter

design available in the literature.

Keywords: Continuous-time uncertain systems, Robust

H2 and H∞ filtering, Linear matrix inequalities

Filtro de partículas aplicado ao rastreamento de alvos manobrantes utilizando a velocidade radial Victor Baptista Frencl, João Bosco Ribeiro do Val




Brasil Set-2010 pp:1763-1770

Abstract: The objective of this paper is to study the particle

filter, together with the BLUE filter, applied to the problem of

maneuvering tracking targets in space. Based on this study, we

propose a method to obtain the angular velocity of the target in

constant turn trajectories by using the radial velocity

information from the observation vector. In the end, we will

show some tests results to evaluate the performance of the

proposed filter, comparing them with some tests results with

IMM filter banks.

Keywords: Target Tracking, Dynamic Models,

Observation Models, Particle Filter, BLUE filter, Radial

Velocity, Angular Velocity

Full Rate and Full Diversity Codes for the 2x2 Coherent Multiple-Input Multiple-Output (MIMO) Systems Edson Donizete de Carvalho, Antonio Aparecido de Andrade,

Reginaldo Palazzo Jr., Jozué Vieira Filho




Brasil Sep-2010 pp:2649- 2654

Abstract: In this work we present a new class of space-time

block codes based on arithmetic Fuchsian groups.This new

class of codes satis_es the property full-diversity, linear

dispersion and full-rate.

Keywords: MIMO-systems, space-time code, diversity,

division ring, arithmetic fuchsian groups

Global Maximization of a Generalized Concave Multiplicative Problem in the Outcome Space Alireza Mohebi Ashtiani, Paulo Augusto Valente Ferreira

In: XXXIII Congresso Nacional de Matemática Aplicada e

Computacional (CNMAC)

Aguas de Lindoia, SP Sep-2010 pp:1-6

Abstract: In this work we proposed an outcome space

approach for globally solving generalized concave

multiplicative problems, a special class of nonconvex problems

which involves the maximization of a finite sun of products of

concave functions over a nonempty compact convex set. It is

shown that this nonconvex maximization problem can be

reformulated as an indefinite quadratic problem with infinitely

many linear inequality constraints. A relaxation-constraint

enumeration algorithm is used to solve such indefinite quadratic

programming problem. A computational experience is reported.

Keywords: Global optimization, multiplicative

programming, convex analysis, indefinite quadratic

programming,

Max-plus Linear Observer: Application to Manufacturing Systems. Laurent Hardouin, Cristina A. Maia, Bertrand Cottenceau,

Rafael Santos Mendes

In: 10th International Workshop on Discrete Event Systems-

WODES2010

Berlin – Germany Sep-2010 pp:1-7

Abstract: This paper deals with the observer design for max-

plus linear systems. The approach is based on the residuation

theory which is suitable to deal with linear mapping inversion

in idempotent semiring. An illustrative example allows to

discuss about a practical implementation.

Keywords: Discrete Event Dynamics Systems,

Idempotent Semirings, Max-Plus Algebra, Residuation

Theory, Timed Event Graphs, Dioid, Observer, State

Estimation.

Modelo Adaptativo Nebuloso para Detecção e Diagnóstico de Falhas André Paim Lemos, Walmir Matos Caminhas, Fernando

Antonio Campos Gomide




Brasil Sep-2010 pp:3284-3291

Abstract: This paper introduces a new online approach for

fault detection and diagnosis. The approach is an evolving

fuzzy classifier that incorporates new operational information

using incremental unsupervised clustering algorithm. The

efficiency of the approach is verified in fault detection and

diagnosis of an induction machine. Experimental results show

that the approach is competitive for fault diagnosis of dynamic

systems especially when there is no complete information about

failure modes.

Keywords: Fault Detection and Diagnosis, Evolving

Fuzzy Systems

Modelos Baseados em Conjuntos Aproximados Carlos Alberto Murari Pinheiro, Fernando Antonio Campos

Gomide, Otávio Augusto Salgado Carpinteiro, Isaías Lima

64 Sinopse da FEEC




Brasil Sep-2010 pp:3182-3188

Abstract: This work suggests a new method to develop rule-

based models using concepts about rough sets. The rules

encapsu-late relations among variables and give a mechanism

to link granular descriptions of the models with their

computational proce-dures. An estimation procedure is

suggested to compute values from granular representations

encoded by rule sets. The method is useful to develop granular

models of static and dynamic nonlinear systems and processes.

Numerical examples illustrate the main features and the

usefulness of the method.

Keywords: Rule-based models, system modeling,

function approximation, dynamic systems, non-linear

model, rough sets.

Modelos baseados em conjuntos aproximados Carlos Pinheiro, Fernando Gomide, Otávio Carpinteiro, Isaías

Lima




Brasil Set-2010 pp:3182-3188

Abstract: This work suggests a new method to develop rule-

based models using concepts about rough sets. The rules

encapsu-late relations among variables and give a mechanism

to link granular descriptions of the models with their

computational proce-dures. An estimation procedure is

suggested to compute values from granular representations

encoded by rule sets. The method is useful to develop granular

models of static and dynamic nonlinear systems and processes.

Numerical examples illustrate the main features and the

usefulness of the method.

Keywords: Rule-based models, system modeling,

function approximation, dynamic systems, non-linear

model, rough sets

Modelos Lineares GOBF com Funções Internas Jeremias Barbosa Machado, Ricardo José Gabrielli Barreto

Campello, Wagner Caradori do Amaral




Brasil Sep-2010 pp:505-512

Abstract: This paper presents a approach to the representation

of linear dynamic systems using generalized orthonormal basis

functions. This technique includes a method to select the poles

of the model by nonlinear optimization algorithms, which

require to calculate the gradients of the orthonormal functions

outputs with respect to their parameters. These gradients are

calculated analytically and provide the exact direction of search

in the optimization of those parameters. A simulated example

illustrates the techniques of modeling and identification

proposed.

Keywords: Dynamic linear Systems, Orthonormal Basis

Functions, Identification, Modeling

Nova proposta de controle adaptativo para sistemas discretos no tempo utilizando estimação da saída da folga desconhecida Talía Simões dos Santos, Yuzo Iano




Brasil Set-2010

Abstract: In this paper, we focus on the development of a new

adaptive control scheme for systems with unknown backlash.

More specifically, we propose a discrete-time adaptive backlash

inverse based controller for plants that have a known linear part

and an unknown backlash at its input. We also demonstrate that

the harmful effects of backlash can be cancelled by adding two

adaptive backlash inverse structures one being feedbacked by a

linear gain and a filter that estimates the unknown backlash

output, that is, it estimates the linear plant input. The backlash

inversion blocks provide new adaptive laws for the updating of

the backlash inverse parameters, using the estimated backlash

output. We show by simulations that the filter accurately

recovers the linear plant input and that our adaptive control

approach improves the system performance, once the difference

between the backlash output and the adaptive backlash inverse

input, converges to a very small value. The simulations involve

a third order system in order to highlight the efficiency of

proposed adaptive control approach.

Keywords: Backlash, Adaptive Control, Estimation,

Filtering.

Nova proposta de controle adaptativo para sistemas discretos no tempo utilizando estimação da saída da folga desconhecida Talía Simões dos Santos, Yuzo Iano




Brasil Set-2010 pp:5261-5267

Abstract: In this paper, we focus on the development of a new

adaptive control scheme for systems with unknown backlash.

More specifically, we propose a discrete-time adaptive backlash

inverse based controller for plants that have a known linear part

and an unknown backlash at its input. We also demonstrate that

the harmful effects of backlash can be cancelled by adding two

adaptive backlash inverse structures one being feedbacked by a

linear gain and a filter that estimates the unknown backlash

output, that is, it estimates the linear plant input. The backlash

inversion blocks provide new adaptive laws for the updating of

the backlash inverse parameters, using the estimated backlash

output. We show by simulations that the filter accurately

recovers the linear plant input and that our adaptive control

approach improves the system performance, once the difference

between the backlash output and the adaptive backlash inverse

input, converges to a very small value. The simulations involve

a third order system in order to highlight the efficiency of

proposed adaptive control approach.

Keywords: Backlash, Adaptive Control, Estimation,

Filtering.

Novas condições LMI para projeto de controladores estáticos mistos H2/H∞ por realimentação de saída para sistemas politópicos contínuos invariantes no tempo Cristiano Marcos Agulhari, Pedro Luis Dias Peres, Ricardo






Abstract: This paper deals with the design of H2-H∞ robust

static output-feedback controllers for uncertain continuous-time

linear systems, with time-invariant parameters lying in

polytopic domains. The proposed technique is based on the

resolution of LMI (Linear Matrix Inequality) conditions and

consists of two stages: a parameter-dependent state-feedback

gain is obtained at the first stage and used as an input to the

second stage, which returns a robust output-feedback static gain

associated to a mixed H2-H∞ criterium. The conditions are

based on parameter-dependent Lyapunov functions and,

differently from most of existing methods, can deal with

uncertainties in the output matrix. The validity and the

efficiency of the method are illustrated by means of

comparisons with other conditions from the literature.


Keywords: Static output feedback, H2 norm, H∞ norm,

Uncertain continuous-time linear systems, Linear matrix

inequalities

Planejamento Operacional e Controle de Alocação de Vagões em Tempo Real Joelma Cristina Costa, Rodrigo De Almeida Gonçalves,

Fernando Antonio Campos Gomide




Brasil Sep-2010 pp:1947-1953

Abstract: Empty freight car assignment process involves a

considerable amount of information and requires fast response

to quickly inform assignment decisions to railroad yard control

centers. Attachments and detachments activities along trains

route must be planned and executed to avoid delays and

operation disturbances. This paper suggests an algorithm to

solve empty car assignment operational planning problems in

real time. The purpose of the algorithm is to provide

operational control centers with a coordination and control

mechanism to manage empty car operations at rail yards. The

car assignment algorithm considers the train schedule, train

routes, train capacity, and railroad operational knowledge.

Experimental results show that the algorithm provides realistic

and e

ective solutions for car allocation and management than

alternative methods when considering the quality of the

solution and computational performance.

Keywords: Car Assignment Problem, Real Time

Operations Planning

Previsibilidade Local e Estruturas Lagrangianas Coerentes no Modelo de Fitzhugh-Nagumo. Diogo Coutinho Soriano, Ricardo Suyama, Romis Ribeiro De

Faissol Attux

In: XXII Congresso Brasileiro de Engenharia Biomédica

(CBEB 2010) - ISBN: 2179-3220

Sociedade Brasileira de Engenharia Biomédica - SBEB

Tiradentes(MG) Brasil Nov-2010 pp:461-464

Abstract: This work aims to study the local predictability in

the classical FitzHugh-Nagumo neuronal model, which is

quantifyed by means of the the finite-time Lyapunov exponents

using a method specially developed here to deal with the non-

smooth excitation commonly applied to neuronal models. The

technique allows to identify regions of critical predictability in

the form of Lagrangian Coherent Structures as it is defined in

fluid mechanics, and associte them to the phisiological states

represented by the model. In particular, it is possible to locate

the action potential threshold in the phase space and

discriminate the physiological states where the model is able to

provide reasonable predictions given an uncertainty in the

initial state.

Keywords: expoentes de Lyapunov de tempo finito,

previsibilidade, modelo neuronal de FitzHugh-Nagumo,

caos.

Projeto convexo de controladores por realimentação de estados para sistemas discretos chaveados com saturação Taís Calliero Tognetti, Vinícius Foletto Montagner, Renato

Alves Borges, Pedro Luis Dias Peres




Brasil Set-2010 pp:4076 - 4082

Abstract: O projeto de um controlador chaveado para

sistemas chaveados discretos no tempo com saturação no

atuador é investigado neste artigo. Um procedimento convexo

em termos de desigualdades matriciais lineares baseado em

uma função afim de Lyapunov é fornecido para projetar um

controlador chaveado que garanta a estabilidade do sistema

sujeito a uma função arbitrária de chaveamento. Restrições de

alocação de pólos também são consideradas para satisfazer

eventuais especificações no domínio do tempo, tais como

tempo de subida, sobresinal máximo e tempo de acomodação.

As condições propostas possuem variáveis extras e fornecem os

ganhos do controle independentemente das matrizes de

Lyapunov, o que possibilita a obtenção de resultados menos

conservadores. A relação entre o tamanho da região de alocação

de pólos e o tamanho da região de estabilidade local é

investigada. Um exemplo numérico ilustra a eficiência das

condições propostas.

Keywords: Sistemas discretos chaveados, Saturação,

Controle chaveado, Realimentação de estados,

Desigualdades matriciais lineares.

Redes Neurais Granulares para Aprendizagem Incremental Semi-Supervisionada Daniel Furtado Leite, Pyramo Pires Da Costa Júnior,





Brasil Sep-2010 pp:2592-2599

Abstract: This paper suggests an adaptive fuzzy neural

network framework to classify data streams using a partially

supervised learning algorithm. The framework consists of an

evolving granular neural network which processes

nonstationary data streams using a one-pass incremental

algorithm. The granular neural network evolves fuzzy

hyperboxes and uses a new nullnorm-based neuron model.

Contrary to the usual parametric approaches, learning performs

simultaneous structural and parametric adaptation whenever

environment changes are re ected in input data. The approach

does not require prior statistical knowledge about data and

classes. Computational experiments show that the granular

neural network is robust, processes unlabeled examples, and

handles different types of concept drift efficiently.

Keywords: Granular Computing, Evolving Systems,

Incremental Learning, Concept Drift

Regulador linear quadrático de sistemas lineares com saltos markovianos e controle nos chaveamentos Alessandro N. Vargas, João Y. Ishihara, João Bosco Ribeiro do

Val




Brasil Set-2010 pp:4701-4705

Abstract: In this paper, we present a suboptimal linear

quadratic regulator for Markov Jump Linear Systems with a

class of control in jumps. The system presents a doubly

switching structure in a manner that part of the system

parameters jump according to a Markov chain and the other

jump according to a given switching rule. This approach is

useful, for instante, to model certain Networked Control

Systems as illustrated in the paper.

Keywords: linear quadratic problems, switching

systems, Markov processes

Robust H-2 filter design for polytopic linear systems via LMIs and polynomial matrices Márcio Júnior Lacerda, Ricardo Coração de Leão Fontoura de

Oliveira, Pedro Luis Dias Peres

In: 49th IEEE Conference on Decision and Control - CDC2010

Atlanta, Georgia, USA Dec-2010 pp:1466-1471

Abstract: This paper presents new linear matrix inequality

conditions for full order robust H-2 filter design for continuous

and discrete-time polytopic linear systems with time-invariant

uncertainty. Thanks to the use of a larger number of slack

66 Sinopse da FEEC

variables, the proposed conditions are less conservative than the

existing conditions in the literature, containing recently

published results as particular cases. Examples illustrate the

better performance of the proposed filters when compared to

other approaches for robust filter design.

Keywords: Uncertain systems, Robust H-2 filtering,

Homogeneous polynomial Lyapunov functions, LMI

relaxations

Síntese de filtro H-2 robusto como um problema de realimentação estática de saída Renato A. Borges, Taís Calliero Tognetti, Ricardo Coração de

Leão Fontoura de Oliveira, Pedro Luis Dias Peres





Abstract: Neste artigo, o problema de projeto de filtros H2

para sistemas discretos e invariantes no tempo é investigado. O

problema de filtragem é reescrito como um problema de

realimentação estática de saída e o lema da eliminação utilizado

para a obtenção das condições de síntese. Ambos os casos

precisamente conhecido e incerto são considerados. As

condições de síntese obtidas por meio de funções de Lyapunov

são expressas como desigualdades matriciais lineares. Um filtro

robusto de ordem arbitrária é obtido solucionando um problema

de otimização que minimiza um limitante superior para o

desempenho H2 do erro de estimação. Um exemplo numérico é

apresentado.

Keywords: Filtragem de ordem reduzida, Desempenho

H2, Funções de Lyapunov, Desigualdades matriciais

lineares.

Stability Analysis and Control Design for LPV Systems using Homogeneous Polynomial Path Dependent Lyapunov Functions Luis Antonio Rodrigues, Juan Francisco Camino dos Santos,

Pedro Luis Dias Peres




Brasil Sep-2010 pp:4714-4720

Abstract: This paper presents LMI conditions for stability

analysis and synthesis of robust and gainscheduled state

feedback controllers for discrete-time linear parameter-varying

(LPV) systems. It is assumed that the system matrices have a

homogeneous polynomial dependence of arbitrary degree on

the time-varying parameters. The parameters are assumed to

vary inside a polytope and have known bounds on their rate of

variation. The geometric properties of the polytopic domain are

exploited to derive a finite set of linear matrix inequalities

(LMIs) that take into account the bounds on the rates of

variation of the scheduling parameters. The LMI conditions are

obtained using a quadratic in the state Lyapunov function with

a homogeneous polynomial dependence on the scheduling

parameters at successive instants of time. Numerical results

show the benefits of the proposed approach.

Keywords: Time-varying systems, discrete-time systems,

stability analysis, control design, Lyapunov function,

LMI conditions.

Static output feedback control of polytopic systems using polynomial Lyapunov functions Cristiano Marcos Agulhari, Ricardo Coração de Leão

Fontoura de Oliveira, Pedro Luis Dias Peres


Atlanta, Georgia, USA Dec-2010 pp:6894-6901

Abstract: This paper is concerned with the problem of robust

static output feedback control design for continuous-time

uncertain linear systems. The uncertain time-invariant

parameters belong to a polytopic domain and affect all system

matrices. A two-stage linear matrix inequality procedure is

proposed. At the first step, a stabilizing state feedback

scheduled gain with polynomial or rational dependence on the

parameters is determined. This state feedback gain is used as an

input parameter for the second stage, which synthesizes the

robust static output feedback gain. In both stages, a

homogeneous polynomially parameter-dependent Lyapunov

function of arbitrary degree is used to assess closed-loop

stability. Numerical examples demonstrate that with the

increase of the degree of the polynomial matrices more accurate

results are obtained, outperforming the existing methods in the

literature.

Keywords: Static output feedback, uncertain linear

systems, Homogeneous polynomial Lyapunov functions,

LMI relaxations

Uma análise empírica da acumulação de reservas internacionais em períodos de crise Ana Cláudia V. S. Bulcão, José Leite Silva Jr., Takaaki Ohishi




Brasil Set-2010 pp:4881-4888

Abstract: For the International Monetary Fund, international

reserves are the assets managed by the monetary authority of a

country that are readily available to fund any deficits in balance

of payments. Reserves are also important to show strength in

the conduct of monetary and exchange policies of a country.

However, the importance of international reserves does not

seem to be unanimous theme among economists. Some critics

argue there is a high cost in the maintenance of such reserves,

and investment alternatives would be more attractive. Other

economists say the cost of maintaining reserves is negligible

compared to costs of financial crises related to capital flight, or

the loss of value of national currency. However, usually both

sides are unable to provide empirical evidence of their

arguments. The aim of this work is to study if the accumulation

of international reserves was related to the resumption of

economic development after the occurence of a crisis. Thus, it

offers empirical evidence as a contribution to the debate about

the usefulness of reserves.

Keywords: International Reserves, Crisis, Self-

organizing Map

Uma proposta imuno-inspirada para a solucção algébrica da equação de Riccati no problema de identificação de séries temporais no espaço de estado Mateus Giesbrecht, Celso Pascoli Bottura




Brasil Set-2010

Abstract: In this paper an immuno-inpired approach to _nd

the solution of algebraic Riccati equation is proposed. The

motivation to develop this new method is that a Riccati

equation arises from the state space time series modeling

problem and the solution of this equation must be a covariance

matrix. Since constant parameters of the Riccati equation are

calculated from experimental data, the solution found with the

known methods is not a covariance matrix. By transforming the

Riccati equation on a constrained optimization problem, and

solving it with the immuno-inspired algorithm, a matrix

structured as a covariance matrix is found. With this solution,

the time series given from the model reects the original one.

Keywords: State space time series identification,

Immuno-inspired algorithms, Artificial intelligence,

Riccati Equation



Blue light and supercontinuum generation using small-core silica photonic crystal fibers Enver Fernandez Chillcce, C. M. B. Cordeiro, Roddy Elky

Ramos Gonzales, Hugo Luis Fragnito, Carlos Henrique de

Brito Cruz, Hugo Enrique Hernandez Figueroa, L.C. Barbosa

In: Latin America Optics and Photonics Conference (LAOP)

Recife - PE Sep-2010 pp:1 - 6

Abstract: The fabrication of small-core photonic crystal fibers

and preliminary supercontinuum generation characterization are

reported. In such non-linear experiments fs pulses from a Ti:

Sapphire laser were coupled in the fiber core and the generated

spectra recorded.

AC – Clocked Power Supply DCVSL – Differential Cascode Voltage Switching Logic: CMOS Layout Design Guidelines to Optimize Energy Dissipation Humberto Xavier de Araujo, Luiz Carlos Kretly

In: 26 2010 IEEE 26-th Convention of Electrical and

Electronics Engineers

Eilat- Israel Nov-2010 pp:1 - 6

Abstract: The AC power supply clocked circuits is a class of

digital gates which uses clock signals replacing the VDD and

ground terminals in the static gates. In this paper the guideline

for an AC-clocked logic gate is described. One crucial problem

related to digital circuits design is the zero-order calculation or

first guess on the device dimensions. The DCVSL-Differential

Cascode Voltage Switching Logic in CMOS technology is a

critical circuit if the designer has restricted specification such as

maximum operational frequency, load or fan-out. This paper

shows a detailed design methodology for DCVSL which is also

useful for other circuit and configurations. The XNOR gates

with three inputs were designed under frequency and load

restrictions. A few design rules were established allowing the

designer a great knowledge in the circuit operation and

performance optimization. As a result, the design rules were

validated by simulation tools such as ADS-Advanced Design

System, and the complete layout generated on 0.35 μm CMOS

technology for further integration. A Full Adder circuit layout

was also implemented on CMOS technology. The comparison

between the AC-clocked circuit and the DCpower supply

circuit shows that there is effective energy consumption

favorable to the AC –clocked gate.

Keywords: DCVSL, full adder, AC-clocked logic gate

and energy consumption

An EM Simulation and Design of a GTEM Chamber for EMC Pre-Compliance Tests on Electronic Board and ICs in 500 MHz 18 GHz Range Humberto Xavier de Araujo, Luiz Carlos Kretly

In: MOMAG 2010 - 14º SBMO – Simpósio Brasileiro de

Microondas e Optoeletrônica e 9º CBMAG – Congresso

Brasileiro de Eletromagnetismo

Vila Velha -ES- Brasil Sep-2010 pp:753-757

Abstract: the design and simulation of a GTEM - Gigahertz

Transverse Electromagnetic chamber employed in

precompliance tests and electromagnetic compatibility for

automotive, electronic boards and integrated circuits are

presented on this work. The physical conception of the chamber

projected for a range from 500 MHz – 18 GHz. The APEX

(match between RF excitation and the body of the chamber )

design is minutely shown. This chamber has significant

advantages over equivalent systems: TEM cell, Near Field Test

Setup, Open Area Test Site (OATS) and others, due to the

extended frequency range and mainly in economic terms

compared to the commercial available chambers.

Keywords: GTEM, Integrated Circuits, EMC, EMI

Análise Teórica de EDFAs com Controle Totalmente Óptico de Ganho Rafael Martins Buck De Godoy, Aldario Chrestani Bordonalli




Vila Velha-ES-Brasil Set-2010 pp:211-216

Abstract: Realizou-se um estudo do amplificador a fibra

dopada com Érbio, considerando-se bombeio na direção co-

propagante, que resultou num modelo matemático de seu

comportamento operacional. Além disso, levando-se em conta

o aumento do número de canais como uma forma de ampliar a

capacidade de transmissão e adotando-se as funcionalidades

propostas para as redes ópticas atuais, acresceu-se ao modelo

desenvolvido uma rotina que simulasse o controle de ganho

totalmente óptico. Como resultado, obteve-se um programa de

simulação que permite prever o comportamento do

amplificador de ganho controlado sob diversas condições de

operação de rede, tornando-se uma ferramenta útil na análise e

projeto de EDFAs para redes reconfiguráveis.

Keywords: EDFA, AOGC, métodos numéricos, ganho

óptico, simulação.

Circuito eletrônico para emulação de sensores em fibras ópticas com grades de Bragg excitados por lasers semicondutores com módulos termoelétricos Pedro Carvalhaes Dias, Elnatan Chagas Ferreira, Maurício

Silveira

In: COBENGE' 2010

Fortaleza, CE Set-2010 pp:1-3

Abstract: Este trabalho apresenta um circuito desenvolvido

para permitir a realização de experimentos em laboratório

envolvendo interrogadores eletrônicos para sensores com

grades de Bragg em fibras ópticas. Os lasers semicondutores

DFB são elementos que facilmente são queimados ao serem

empregados em laboratórios, e junto com as grades de Bragg e

os outros componentes ópticos de um sistema de interrogação

convencional, têm custo muito alto (da ordem de grandeza de

um osciloscópio digital), e as escolas de engenharia não podem,

em geral, disponibilizar estes componentes para experimentos

em laboratórios de graduação. O circuito desenvolvido emula o

comportamento de um sistema laser+sensor com grade de

Bragg+módulo termoelétrico, permitindo que os alunos

realizem experimentos com interrogadores destes sensores sem

utilizar os componentes ópticos de alto custo necessários em

um sistema de medidas convencional.

Keywords: Laboratório de graduação, Sensores com

grades de Bragg, Circuitos emuladores, Sensores a

fibras opticas.

Collaborative Distance Teaching of Electronics in Synchronous and Asynchronous Environments Using Free Software Luís Rogério Gomes de Almeida, José Antonio Siqueira Dias

In: IEEE.AM - Advances in Communications, Computers,

Systems, Circuits and Devices

Puerto de La Cruz, Tenerife – Spain Dec-2010 pp:239-244

Abstract: The aim of this work was to diversify the supply of

vocational training in electronics by developing a methodology

based on synchronous and asynchronous distance teaching with

access to a specific software for the realization of Online

experiments. Despite the fact that Online courses exist in a

great quantity, only a few of them deal with complex

technologies and collaborative practical activities.

Keywords: Distance Learning, Learning Environments,

Teaching Electronics in Distance.

68 Sinopse da FEEC

Electromagnetic Analysis of Very Large Field Problems Using a Hybryd Numerical Technique Juliano Fujioka Mologni, Mateus Bonadiman, Leandro

Percebon, Cesareo de La Rosa Siqueira, Marco Antonio Robert

Alves, Filipe Braumgratz and Edson Fonseca




Vila Velha-ES-Brasil Sep-2010

Abstract: Electromagnetic analysis of large and open

radiating problems at high frequencies is very complex when

using the finite element method (FEM) numerical technique.

Since the element size is proportional to the wavelength, a great

amount of computational resources is required to solve the

problem. On the other hand, alternative methodologies like the

method of moments (MoM) shows some constraints regarding

the excitation of the sources and a considerable higher demand

of computer power when analyzing dielectric materials. We

present a hybrid technique available on Ansys’ High Frequency

Structure Simulation (HFSS) software consisted by the FEM

and the full wave MoM integral equation methodologies. To

demonstrate the feasibility and the benefits of this technique, a

parabolic dish excited by a conical horn antenna was placed on

a 4m height tower and a complete electromagnetic analysis was

carried out at 4GHz. Numerical results are shown and the

hybrid procedure is detailed. This methodology enables the

simulation of very large scale structures at high frequencies

with a significantly moderate usage of computational resources.

Estudo e compensação da deriva térmica, estabilidade do fator de escala e linearização de um circuito de condicionamento e processamento de sinais de girômetro interferométrico a fibra óptica Elnatan Chagas Ferreira, Rodrigo Horikawa Watanabe, Jose


In: VI Simpósio Brasileiro de Engenharia Inercial (SBEIN)

Rio de Janeiro, RJ Set-2010 pp:1-6

Abstract: A proposta deste trabalho é realizar o estudo e o

desenvolvimento de uma técnica de compensação da deriva de

temperatura no circuito eletrônico do girômetro, afim de

melhorar a performance do mesmo. Para emulação do circuito

óptico, foi desenvolvido um software em LabVIEW. O

software controla um gerador de onda arbitrarias e calcula a

saída do fotodiodo através da formulação teórica. Os resultados

da emulação quando comparados com os valores teóricos do

sinal de Sagnac apresentaram um erro de apenas ±0, 02%. Foi

desenvolvido também um sistema de calibração que utiliza a

técnica look-up-table para compensação da deriva térmica,

estabilidade do fator de escala e para linearização do circuito de

condicionamento de sinais. Os resultados obtidos com as

compensações se mostraram bastante importantes, melhorando

a deriva do bias de 0, 15◦/h para 0, 065◦/h em uma faixa de

temperatura de 35◦C a 75◦C; estabilidade do ganho de

±1000ppm para ±175ppm em uma faixa de temperatura 35◦C `a

75◦C e a linearidade da resposta do circuito eletrônico de 3%

para 0, 03%.

Keywords: giroscópio, girômetro, deriva térmica,

calibração

NCMA Otimizado para Mitigação de Interferentes Rectilineares Aplicado a Arranjos de Antenas Adilson Chinatto, Cynthia Cristina Martins Junqueira, Joãoo

Marcos Travassos Romano

In: XII Simpósio de Aplicações Operacionais em Áreas de

Defesa (XII SIGE)

São Jose dos Campos-SP Out-2010 pp:1 - 6

Abstract: O uso de arranjos de antenas para a mitigação de

interferentes têm sido mostrado na literatura como um

instrumento inovador em aplicações civis e militares. Os

algoritmos não supervisionados podem ser considerados nestas

aplicações objetivando evitar procedimentos de treinamento e

tornar as transmissões e recepções mais eficientes e seguras.

Aliando estes fatos à possibilidade de explorar as vantagens do

processamento largamente linear, neste trabalho mostra-se o

desempenho de uma versão otimizada do algoritmo do Módulo

Constante Normalizado para sinais rectlineares. Resultados de

simulações confirmam seu desempenho superior quando

comparado à versão original estritamente linear.

Keywords: Arranjo de Antenas, Algoritmo do Módulo

Contante, Sinais Rectilineares

Optical Torque Analysis of Double-Negative Optical Trapping with Focused Gaussian Beams Leonardo André Ambrósio, Hugo Enrique Hernandez Figueroa


Recife, PE Sep-2010 pp:1 - 6

Abstract: Preliminary results of the optical torques exerted on

negative refractive index spherical particles trapped by focused

Gaussian beams are shown, based on the generalized Lorenz-

Mie theory and the integral localized approximation, revealing

new trapping behaviors.

Polarization Dependent Loss in Hybrid Photonic Crystal Fibers Daniel Grandin Lona, Arismar Cerqueira Sodre Junior, G.

Stefanini, Hugo Luis Fragnito, Hugo Enrique Hernandez

Figueroa




Vila Velha -ES- Brasil Sep-2010 pp:1 - 6

Abstract: We have experimentally investigated the

polarization dependent loss in Hybrid Photonic Crystal Fibers.

It was obtained a power variation of 23 dB between the two

polarization states. This power loss dependence was analyzed

for different fibers as a function of photonics bandgaps

positions.

Keywords: Photonic Crystal Fibers (PCF), Hybrid

Photonic Crystal Fibers, Polarization-Maintaining

Fibers (PMF)

Problema Inverso de PBG Absoluta em Dielétrico Anisotrópico via Computação Bio-Inspirada Gilliard Nardel Malheiros Silveira, Hugo Enrique Hernandez

Figueroa, Vitaly F. Rodrigues




Vila Velha - ES - Brasil Set-2010 pp:1 - 6

Abstract: O Método dos Elementos Finitos (FEM) e

Algoritmos genéticos (AG) foram utilizados para solução de

problemas inversos envolvendo busca e maximização de

Bandas Fotônicas Proibidas absolutas. Foram avaliados cristais

com arranjos quadrados, constituídos por ar e telúrio (dielétrico

anisotrópico). Problemas inversos desse porte são custosos

computacionalmente, assim os band gaps foram calculados nos

nós da primeira

Keywords: Cristais Fotônicos, Photonic Band Gap,

Anisotropia uniaxial, Algoritmos Genéticos, Elementos

Finitos

Rede de sensores sem fio de baixo custo para monitoramento ambiental Marcel S. Silva e Fabiano Fruett




Brasil Set-2010 pp:2351-2356

Abstract: This paper presents a Wireless Sensors Network

designed for monitoring Temperature, Relative Humidity and


Atmospheric Pressure in the Amazon Rainforest. A 32-bit

microcontroller and a transceiver module working in the ISM

frequency range are used to compose the sensor nodes,

providing energy optimization, while several sensors are used

to perform measurements, like a Temperature and Humidity

sensor with digital interface from Sensirion. The measurements

are accessed by a web page embedded in a microcontroller and

available through an IP address, that allows access to the data

acquired in real time. Tests performed with a first prototype

allowed the sensors network, at low cost, to be implemented to

monitor temperature and humidity remotely.

Keywords: Wireless Sensor Network, Amazon, Remote

Sensors, Embedded Systems

Redes de sensores sem fio: uma abordagem prática Yull Heilordt Henao Roa, Fabiano Fruett




Brasil Set-2010 pp:2329-2336

Abstract: This paper presents an overview of some of the

Wireless Sensors Network (WSN) characteristics and setting up

a pear-to-pear network with two and three nodes, using a

Microcontroller Sport Activities Monitoring System (SAMS)

and the ZigBee™ XBee/XBeePro modules from Digir.

Acceleration and rotation microelectromechanical sensors

(MEMS) and a temperature sensor are included in the SAMS

hardware node. A graphical interface based on a LabVIEW™

Virtual Instrument (VI) was developed for each of the networks

proposed. This article also presents the difficulties, cares and

limitations encountered during the WSN implementation.

Keywords: WSN, Sensors, Virtual Instrumentation

Sensor network for energy-efficiency programs: characterization and breakdown of the electricity bill using custom wireless smart meters Luís Fernando Caparroz Duarte, José Douglas Bertazzoni

Zambianco, Douglas Airoldi, Elnatan Chagas Ferreira, Jose


In: International Conference on Circuits, Systems, Signals

(CSS'10) - ISBN: 9789604742264

Malta Sep-2010 pp:262-265

Abstract: Understanding and monitoring the electrical energy

use is fundamental to encourage consumers and small business

owners to implement energy-efficiency measures and,

therefore, to cut their energy bills significantly. This works

presents the design, development and implementation of an

electrical energy monitoring sensor network which can be

easily installed to measure and monitor the energy use of every

appliance in a house, presenting to the consumer a detailed

report of the energy spent by each electrical device (TV, lights,

showers, etc.). The measuring units and a coordinator form a

wireless network, which is capable of measuring the electrical

energy and recording the data of each home appliance in the

flash memory of the coordinator. The data stored in the

coordinator is sent (via a wireless connection) to a computer

where the analysis of the data is performed and a detailed report

of the energy breakdown is presented.

Keywords: PLC, Power meter, Sensor network, ZigBee.

Sistema autônomo descentralizado de irrigação localizada para pomares auxiliado por sensor de umidade do solo Luís Fernando Caparroz Duarte, Wellington Roque, Elnatan

Chagas Ferreira, Jose Antonio Siqueira Dias

In: XXI Congresso Brasileiro de Fruticultura

Natal, RN Out-2010 pp:1-4

Abstract: Melhorar a eficiência da agricultura e reduzir seu

impacto ambiental são necessidades cada vez mais expressivas

no meio agrícola. Para alcançar resultados satisfatórios na

proteção do meio ambiente sem deixar de buscar por patamares

mais elevados de produtividade, é necessária a utilização de

técnicas avançadas para o manejo das culturas. A agricultura de

precisão vem sendo cada vez mais estudada e desenvolvida, e o

uso da tecnologia da informação para processar dados

específicos de áreas geograficamente referenciadas e interferir

nas culturas de acordo com suas necessidades individuais é

forte tendência. Neste trabalho é apresentado o

desenvolvimento de um sistema de irrigação localizada

georeferenciado para pomares, com sensores-atuadores

inteligentes, independente de um controlador central ou de uma

rede de dados atuante em tempo integral.

Keywords: Redes de sensores, sensores para

agricultura, agricultura de precisão, irrigação

localizada

Supressão da Informação da Portadora óptica através da Saturação do Ganho de um SOA Ultra-Longo Napoleão dos Santos Ribeiro, André Luiz Rayol Cavalcante,

Cristiano de Mello Gallep, Evandro Conforti





Abstract: Apresenta-se uma técnica de supressão da

informação da portadora óptica baseada na saturação de um

amplificador óptico a semicondutor ultra-longo (8 mm). Uma

caracterização desta técnica com relação a diferentes

parâmetros é realizada, obtendo-se bons resultados de

apagamento de uma modulação senoidal para altas taxas (até 35

GHZ) e para elevados valores de razão de extinção do sinal de

entrada, operando em uma larga faixa de comprimentos de

onda. Obtevese para a frequência de 15 GHz uma supressão de

16, 8 dB de razão de extinção de entrada para 3, 9 dB na saída

do dispositivo.

Keywords: amplificador óptico a semicondutor, redes

ópticas de acesso, supressão de modulação, reutilização

da portadora óptica


Adequação da nomenclatura de acessórios utilizados em vídeo cirurgias e endoscopias no complexo da Unicamp Giselle Ferrari, Saide Jorge Calil


(CBEB 2010) - ISBN: 2179-3220



Abstract: Presently there are several nomenclature systems to

define medical equipment worldwide. This is producing a

multiplicity of different names and codes to define the same

equipment. It also induce to a identification problem among all

sectors involved in the health system. This work aims to adapt

the Universal Medical Device Nomenclature System

(UMDNS), developed by the ECRI INSTITUTE, to better

define the medical devices belonging to UNICAMP’s health

complex. The expected outcome is to facilitate the

communication among the Clinical Engineering department,

medical personal, technical assistance team and vendors.

Keywords: Adequação de nomenclatura, Instrumentos e

aparelhos médicos, Engenharia Biomédica.

Análise comparativa de dez metodologias de análise de causa raiz Gustavo A. Elias, Saide Jorge Calil

In: XXII Congresso Brasileiro de Engenharia Biomédica-2010

Tiradentes(MG) - Brasil Nov-2010 pp:371-374

Abstract: When an incident or near miss happens in health

care, it should be investigated so we can learn from what

70 Sinopse da FEEC

happened and take appropriate action to prevent recurrence of

such incident. The Root Cause Analysis (RCA) is a

methodology commonly used to investigate critical incidents.

This paper analyzes ten methodologies of RCA, five of which

are specific from healthcare and five are from general

applications. The methodologies were analyzed and grouped in

five stages. The ten methodologies were compared for each of

the five stages, aiming to identify the commonalities and

differences. The findings are discussed, trying to highlight

important points that can impact the effectiveness of RCA.

Keywords: Análise de causa raiz, investigação de

incidentes, segurança.

Aplicabilidade do Geant4 para simulação de elétrons em radioterapia Ana Luiza Metidieri Cruz Malthez, Márcio Aparecido Muller e

Vera Lúcia Silveira Nantes Button


(CBEB 2010) - ISBN: 2179-3220


Tiradentes(MG) Brasil Nov-2010

Abstract: The study of interaction of radiation with matter is a

field of great interest in the medical physics. The computational

simulations tools as Monte Carlo have been used in this field.

The Geant4 code is a toolkit that have incorporate several

physical processes and particles that allow its application in

medical physics, in particular, in the area of radiotherapy. In

this work we performed simulations of monoenergetic electrons

beam in the energy range used in radiotherapy, and compared

the results of range of electrons in the water with the results

published by the National Institute of Standards and

Technology (NIST). The simulated results of range were very

close of published results showing that Geant4 is appropriated

to electrons simulations with energy in the range of

radiotherapy.

Keywords: Física Médica, Método de Monte Carlo,

Geant4, elétrons

Applying the HFMEA Technique to the General-Purpose Infusion Pump R. P. Ferreira, Gerson Florence Carvalheira de Azevedo, Saide

Jorge Calil

In: 11th World Congress on Medical Physics and Biomedical

Engineering - ISBN: 9783642038976

Munich, Germany Sep-2010 pp:638-341

Abstract: Attempting to guarantee the quality of infusion

pumps, a study was performed at a Brazilian public hospital

applying the Healthcare Failure Mode and Effect Analysis

(HFMEA). This technique can be applied for usage by the

clinical engineering, to identify the failure modes of

electromedical devices (EMD) and to assess the involved risks.

Through this study, problems that interfere with the

performance of infusion pumps were identified and

subsequently some actions were proposed to help reduce the

risks of these potential problems. These actions certify the safe

functioning of this device within the standards of safety and

quality.

Keywords: infusion pump - HFMEA - risk management -

clinical engineering

CAPM para análise de risco financeiro setorial em estabelecimentos de saúde Maurício Gomes Duarte e Vera Lúcia da Silveira Nantes

Button


(CBEB 2010) - ISBN: 2179-3220



Abstract: With rising costs and revenues, somehow stagnant

due to heavy dependence on Health Plans, the combination of

technical quality with the most rigorous financial controls

became necessary standard of Health Establishments seeking to

remain on the market. The lack of a scientific method to

quantify the financial risk of investing in a particular health

sector in Brazil, or in a aprticular region of the country, makes

the discount rates (interest) askek by financing agents to be

defined in terms of improperly generalized indices, which do

not reflect the actual risk of investment. The purpose of this

study was to use the CAPM (Capital Asset Pricing Model) to

determine the financial risk of investing in a particular health

sector, and this tool showed promising to set the actual viability

of the investment and time to return it.

Keywords: risco financeiro, CAPM, taxa de juros, setor

hospitalar, hospital.

Classificação de equipamentos médico-hospitalares: lógica paraconsistente anotada Natália Ferreira Oshiyama, José Wilson Magalhães Bassani


(CBEB 2010) - ISBN: 2179-3220



Abstract: In this work a classification of medical equipment

based on corrective maintenance data (number of calls, time

spent and cost) was developed. Classes were established by the

Always Better Control analysis. Paraconsistent annotated logic

was used to identify inconsistencies and indeterminacies in the

classification. As an example, only 42.5% of the syringe

infusion pumps were classified as A (the best classification),

but with a high number of indeterminacies, which was taken as

an alert for further examination. A drill down procedure

showed that only one factor (maintenance time) affected

classification of the pumps. This approach may be helpful for

planning equipment acquisition and replacement, as well as

maintenance management.

Keywords: Medical equipment classification, ABC

analysis, Paraconsistent Annotated Logic, Clinical

Engineering.

Conector uretral para apoio ao exame urodinâmico: aplicação clínica João Carlos Martins de Almeida, Rodrigo Horikawa

Watanabe, David Jacques Cohen, Carlos Arturo Levi

D’Ancona, José Wilson Magalhães Bassani


(CBEB 2010) - ISBN: 2179-3220



Abstract: Urodynamics is the gold standard procedure for

diagnosing bladder outlet obstruction although it is invasive,

expensive, time consuming and is not free of complications. In

a previous work, we reported an alternative method developed

for minimally invasive measurement of the vesical pressure.

The method consists of a device named urethral connector and

a portable system for recording the pressure. In the current

work we aimed at reporting some clinical tests of the method.

Its results were compared with the results obtained by using

conventional urodynamics

Keywords: Urodinânica, instrumentação, obstrução

infravesical, testes clínicos

Determinação do efeito da aplicação de ondas sonoras na árvore pulmonar de roedores durante uma curva pressão volume Márcia Zotti Justo Ferreira, Andrea F. da Cruz, Henrique

Takachi Moriya, Hugo E. Hernández-Figueroa, Adriano

Mesquita Alencar


Tirandentes(MG) - Brasil Nov-2010 pp:682-682

Abstract: Os pulmões dos mamíferos são uma árvore binária

do tipo Cayley entre 30 e 40 gerações. As trocas gasosas

acontecem nos alvéolos, localizados nas terminações dessa


árvore pulmonar. Obstruções totais ou parciais de vias aéreas

provocam uma obstrução em todos os ramos hierarquicamente

inferiores a esse ramo, dificultando as trocas gasosas, causando

desconforto, cansaço e, em casos extremos, podendo até levar a

óbito. Durante a inspiração, as vias aéreas colapsadas tendem a

abrir devido ao gradiente de pressão formado entre o topo da

árvore, traquéia, e as terminações alveolares. Essa abertura

usualmente é explosiva, emitindo um som característico [1]

provocando instabilidade na curva pressão volume [2]. Nesse

trabalho pretendemos testar a possibilidade de que uma onda

sonora precipite a reabertura dessas vias aéreas e permita sua

desobstrução promovendo uma redistribuição do volume sem a

necessidade de altas pressões, o que em casos clínicos pode

causar um dano ainda maior nos pulmões.

Keywords: sons pulmonares, curva P-V, elastância.

Dispositivo auxiliar para ajuste de bombas de roletes utilizadas em circulação extracorpórea Johannes D. de Medeiros Júnior, Francisco U. Vieira Júnior,

Nilson Antunes, Reinaldo W. Vieira e Eduardo Tavares Costa


(CBEB 2010) - ISBN: 2179-3220



Abstract: Roller pumps play an important role in

cardiopulmonary bypass. However, the occlusion of the pump

must be set properly; this can be achieved by the static and the

dynamic methods. In this work we present a device used to

assist the perfusionist setting roller occlusion. The device was

designed to be used along with disposable blood pressure

transducers that are commonly used in cardio-pulmonary

bypass surgeries. The system is based on a PIC™ 18F4523

microcontroller to determine the applied mean pressure in the

bypass circuit. We have performed static and dynamic pressure

tests. Our results have shown that the device can be used to

assist the perfusionist to perform the dynamic calibration

method for setting roller occlusion.

Keywords: Circulação extracorpórea, calibração

dinâmica, bomba de roletes, microcontrolador PIC

Dispositivo Auxiliar para Ajuste de Bombas de Roletes Utilizados em Circulacion Extracorpórea Francisco Ubaldo Vieira Júnior, Eduardo Tavares Costa,

Reinaldo Wilson Vieira, N. Antunes, J. D. Medeiros Júnior

In: VII Congresso LatinoAmericano de Tecnologia

Extracorpórea

Lima, Peru Oct-2010 pp:1-4

Abstract: Introdução: Bombas de roletes desempenham um

papel importante na circulação extracorpórea. No entanto, a

oclusão das bombas deve ser realizada de forma adequada e

podem ser ajustadas, principalmente pelos métodos estático e

dinâmico. Objetivo: O objetivo deste trabalho é apresentar um

dispositivo para auxiliar o perfusionista no ajuste de bombas de

roletes, em centro cirúrgico, pelo método de calibração

dinâmica. Métodos: O dispositivo foi projetado para ser usado

junto com transdutores de pressão descartável que são

comumente usados em cirurgias envolvendo circulação

extracorpórea. O sistema foi baseado em um microcontrolador

PIC 18F4523IM para calcular a pressão média de calibração

dinâmica. Foram realizados testes de pressão estática em

transdutores descartáveis de pressão de dois fornecedores. A

resposta dinâmica do dispositivo foi testada e os resultados de

resposta no tempo foram comparados com o auxilio de um

sistema de aquisição de dados comercial. Resultados: Os

transdutores de pressão de dois fabricantes mostram igualdade

nas respostas (p>0, 6). Os testes com o dispositivo associado

aos transdutores mostraram erro, histerese e repetitividade

menores que 3%. Todos os testes dinâmicos de medidas de

pressão para comparação do dispositivo com sistema comercial

mostraram igualdade estatística (p > 0, 05). Conclusão: Os

resultados preliminares em laboratório demonstram que o

dispositivo mostrou facilidade e praticidade de uso bem como

rapidez para o ajuste. Em nossa opinião pode ser facilmente

usado em centro cirúrgico. Testes de fadiga do conjunto estão

sendo conduzidos antes de iniciar testes de campo.

Keywords: Circulação extracorpórea, Bomba de roletes,

calibração.

Efeito de múltiplas repetições para caracterização de movimentos por mecanomiografia Guilherme Nogueira Nogueira-Neto, Gean Francesco Chu,

Eddy Krueger-Beck, Eduardo M. Scheeren, Percy Nohama e

Vera Lúcia da Silveira Nantes Button


(CBEB 2010) - ISBN: 2179-3220



Abstract: People with amputation have restrictions in their

daily lives. Mechanomyography (MMG) sensors can be used in

electromechanical prosthesis control. The goal of this work was

to investigate the ability of triaxial MMG to distinguish wrist

movements (flexion, extension, radial deviation and ulnar

deviation) analyzing repeated muscular contractions. Two

sensors (medial and lateral) were positioned in the volunteer’s

forearm. The RMS and the zero-crossing features were

analyzed. The MMG modulus identified more differences than

the Z axis. The medial sensor presented a better performance

than the lateral sensor in the differentiation of wrist movements.

Keywords: mecanomiografia, contrações repetidas,

movimentos de punho

Engenharia clínica e infraestrutura, podem trabalhar juntas? P. A. Figueiredo e Saide Jorge Calil


(CBEB 2010) - ISBN: 2179-3220



Abstract: This work demonstrates the feasibility of the of

Clinical Engineering and Hospital Infrastructure areas working

under a single coordination in a large public hospital.

Management tools were applied to the administration area

(SWOT Analysis) and the concepts of Clinical Engineering for

the group of employees to build a new organization chart and

not harm the characteristics of each particular area. The end

result was fully positive, with the integration of the areas and

the consequent improvement in patient care.

Keywords: clinical engineering, swot analysis, hospital

management.

Estudo da interação entre o ultrassom com frequência de 1MHz e o tecido cardíaco Elaine Belassiano, Rosana Almada Bassani e Eduardo Tavares

Costa


(CBEB 2010) - ISBN: 2179-3220



Abstract: In cardiology, diagnostic ultrasound is well

established, whereas there is an unexplored potential for

therapeutic applications. Aiming to develop new therapeutic

applications, the interaction between ultrasound (1 MHz

frequency, 325.5mW average power) at different excitation

modes and the cardiac tissue is investigated. Experiments were

conducted on Wistar rat isolated hearts (n=4) placed inside a

perfusion chamber. While being irradiated by ultrasound

through an acoustic window, the beating hearts were connected

to a force transducer. The systolic tension and the heart rate

were monitored. There was a statistically significant difference

(p<0, 05) between the continuous application during 1 and 10

minutes over the developed force.

72 Sinopse da FEEC

Keywords: interação, ultrassom, tecido cardíaco.

Influência da caixa torácica na elastância pulmonar: análise de curvas pressão-volume na inspiração Márcia Zotti Justo Ferreira, Thiago Henrique Gomes Silva,

Marjorie F.R. Silva, Adriano Mesquita Alencar, Hugo E.

Hernández-Figueroa, Henrique Takachi Moriya


Tiradentes(MG) - Brasil Nov-2010 pp:477-480

Abstract: The interaction between lungs and chest wall

determines lung volume, which plays a central part in

respiratory activity. In this study, the influence of chest wall

mechanics on the respiratory system is quantified through

measurements of (i) sigmoidal equation parameters of the

pressure- volume curve and (ii) elastance under closed- a open-

chest situations. A supporting property of the chest wall was

observed at the beginning of inspiration. At larger volumes, a

restricting property of the chest wall was observed. Those

behaviors are reflected in differences in the pressure-volume

curve and elastance estimatives for each situation. It is

suggested that those effects be taken into account in

experiments performed in open-chest situations.

Keywords: caixa torácica, curva P-V, elastância

Metodologia para identificação de riscos relacionados a equipamentos médicos Maurício Gomes Duarte e Vera Lúcia da Silveira Nantes

Button


(CBEB 2010) - ISBN: 2179-3220



Abstract: The objective of this work was to obtain a simple

methodology for identifying risks caused by medical

equipments in hospitals and also the inherent risks of different

hospital sectors, which are known in advance and have their

own control mechanisms. Our proposal was to identify, within

the Clinical Engineering view, risks of procedures and work

routines implemented inefficiently or even the lack of them,

which direct or indirectly lead to the uprise or increase the

levels of risk. We choose to obtain data through the perception

and knowledge of health environment employees. These

informations allow identifing risks and their causes in an easy

way to inform the health establishment which are the points that

must be worked.

Keywords: risco, segurança, treinamento, equipamentos

médicos.

Métodos de compressed sensing para compressão de sinais ECG André K. Takahata, Crstiano M. Agulhari, Leonardo T. Duarte,

Renato R. Lopes, Pedro L. D. Peres, João Marcos T. Romano


(CBEB 2010) - ISBN: 2179-3220



Abstract: Recent works have been applying a new theory

called Compressed Sensing (CS) as a framework for the

compression of biomedical signals. One of the main advantages

of this strategy is the simplicity of the coding step. Such a

feature is important, for instance, in the development of lowcost

remote acquisition systems. Motivated by such a possibility, we

investigate the application of CS methods to the compression of

electrocardiogram (ECG) signals. A set of numerical

experiments is conducted with the aim of assessing the

performance obtained by this new approach and comparing it

with more classical schemes, such as a direct compression

based on wavelets.

Keywords: Sensoriamento comprimido, compressão de

sinais, ECG

Modelo matemático do retículo sarcoplasmático funcionalmente isolado em miócitos cardíacos: influência de buffers de Ca

2+

Marina Carneiro Monteiro, Rosana Almada Bassani, Jose

Wilson Magalhaes Bassani


(CBEB 2010) - ISBN: 2179-3220



Abstract: The mathematical model of the functionally isolated

sarcoplasmic reticulum, previously developed in our laboratory,

was modified to introduce intracellular and intrareticular Ca2+-

binding sites (buffers). Ca2+ transients obtained experimentally

in cardiac myocytes, by application of brief caffeine pulses in

Na+ and Ca2+-free medium, were compared to transients

generated in silico in the same condition. Results indicate that

introduction of intracellular Ca2+ buffering resulted in a more

realistic simulation of the behavior of cardiac myocytes.

Keywords: RyR, retículo sarcoplasmático, buffers de

Ca2+, cafeína, modelo matemático

Myocardial Catecholaminergic Automatism: Role Of β-Adrenoceptor Subtypes and Phosphodiesterases Rosana Almada Bassani, Jose Wilson Magalhaes Bassani

In: XVIII Meeting of the International Society of Heart

Research (ISHR) Latin American Section

La Plata- Argentina Oct-2010 pp:1 - 1

Abstract: Catecholamines are physiological stimulators of

cardiovascular function, but they may also cause arrhythmias.

In isolated rat ventricular myocytes, spontaneous contractions

in response to catecholamine stimulation are Ca2+-dependent, as

they are suppressed by inhibition of the sarcoplasmic reticulum

function. Experiments with selective adrenoceptor (AR)

antagonists revealed that β1-, but not α1- or β2-ARs, mediate

catecholaminergic automatism in these preparations.

Simultaneous β1- and β2-AR stimulation by isoprenaline (ISO)

was less effective at inducing automatism than activation of β1-

ARs alone. Beta2-AR blockade enhanced automatism in

response to ISO, whereas background β2-AR stimulation by

salbutamol (SAL) inhibited the automatic response to

noradrenaline. The latter effect was reversed by β2-AR

blockade. Inhibition of either phosphodiesterase isoform PDE3

or PDE4 potentiated catecholaminergic stimulation of

automatism. However, only PDE4 inhibition was able to

reverse the anti-automatic effect of SAL. We thus conclude that

β2-AR activation antagonizes the β1-AR-mediated stimulation

of myocardial automatism, possibly via increased cAMP

degradation by PDE4 stimulation. Support: CNPq and FAPESP

Brasil).

Keywords: β-Adrenoceptor, automatism, heart

Proposta de ferramenta de engenharia clínica para a identificação de riscos e viabilidade técnica de projetos de produtos Eduardo Jorge Valadares Oliveira, Vera Lúcia da Silveira

Nantes Button e Vivian Cardoso de Morais Oliveira


(CBEB 2010) - ISBN: 2179-3220



Abstract: This paper presents a Clinical Engineering tool used

to identify and quantify the risks and feasibility of products

developing projects, in particular cooperative projects between

the Scientific and Technological Institutions (ICT) and firms.

The tool addresses the risk factors related to market,

technological, regulatory, financial, economic and conjectural

issues. It is believed that the use of the tool in the evaluation of

technological projects will boost the success rate of this type of

enterprise.


Keywords: Engenharia Clínica, Projetos Tecnológicos,

Complexo Industrial da Saúde, Ferramentas de Análise

de Viabilidade.

Radiação Ionizante da Mamografia: Diagnóstico ou Indução ao Câncer Clarissa Fernanda Correia Lima Loureiro, Sergio Santos

Muhlen, Carmen Silvia Bertuzzo


(CBEB 2010) - ISBN: 2179-3220



Abstract: Establishing the biological effects and the safe level

of exposure to ionizing radiation remains so far an elusive

issue. Mammography is an important exam in the early

detection of breast tumors, but since the genes BRCA1 and

BRCA2 were identified as a main cause of hereditary breast

cancer, there is growing concern that exposure to ionizing

radiation could increase mutations in these genes and promote

the development of cancer in young women. In this paper we

propose an in vitro experiment where breast cells from one

patient are irradiated with different doses of X-rays from

mammography, in order to determine the trigger level of

mutation, and thus a safer level of radiation for patients

carrying a mutated allele of either genes BRCA1 or BRCA2.

Keywords: Mamografia, câncer de mama, radiação

ionizante, BRCA, risco radiológico.

Redução da Dose Ocupacional em Fluoroscópia Mariana Sacrini Ayres Ferraz, Sergio Santos Muhlen


(CBEB 2010) - ISBN: 2179-3220



Abstract: Catheterism in medical procedures is responsible

for high X-ray doses, both to patients and medical staff. Aiming

to reduce this dose, modern fluoroscopy equipment have been

developed using pulsed X-ray. This study presents the results of

measurements of occupational doses received during simulated

medical procedures, both for pulsed and continuous

fluoroscopy, and the calculations allowing quantifying the

reduction caused by the use of pulsed technology. Moreover, a

mapping of radiation intensities was performed in the

Laboratory in order to suggest better places (lower occupational

doses) for personnel during medical procedures.

Keywords: Dose ocupacional, Controle de dose, Raios

X, Fluoroscopia.

Sistema Digital Gerador de Forma de Onda Arbitrária para Aplicações de Ultrassom Amauri Amorin Assef, Joaquim Miguel Maia, Renan Broska

Amstrong, Henrique Mineo Ashihara, Eduardo Tavares Costa,

Vera Lucia Da Silveira Nantes Button


(CBEB 2010) - ISBN: 2179-3220



Abstract: This paper presents the development of a 8-channel

digital high-speed ultrasound beamfoming transmitter. The

hardware architecture is controlled by Altera Cyclone III FPGA

Development Kit (EP3C120F780) and allows the flexibility for

multiple ultrasound transmit beamforming waveform with

Gaussian profile, adjustable frequency, amplitude apodization

and phase angle control. The system uses 8 ultrasound

beamforming transmitter Supertex MD2130 and reception

circuits with protection against high voltage. The results

demonstrated that the developed system can be used as

ultrasonic phased arrays focusing transmitter.

Keywords: Ultrassom, Tx beamforming, FPGA.

Sistema Hipermídia de Apoio ao Ensino Técnico de Equipamentos Médicos-Hospitalares Debora Dias Leister Batista, Glades Serra, Sergio Santos

Muhlen


(CBEB 2010) - ISBN: 2179-3220



Abstract: This article presents the construction and evaluation

of a hypermedia system to facilitate technical teaching of

medical-hospital equipment, in a technician preparation course

supported by an industrial institution, aiming to contribute for

the teach-learning process. In this first version, the hypermedia

system is focused in one equipment (cardiac defibrillator). It

was evaluated by a selected group of students, having passed a

pre-test to determine their previous knowledge on the matter,

then using the system proposed, and a post-test to evaluate the

gain. The results showed the learning level was significantly

greater among students that used the hipermedia system,

confirming its value for the teaching-learning process.

Keywords: Hipermídia, Ensino-aprendizagem, Ensino

técnico, Desfibrilador.

Superioridade do Alumínio em Blindagens Eletromagnéticas no Ambiente Hospitalar Rafael Navet de Souza, Sergio Santos Muhlen


(CBEB 2010) - ISBN: 2179-3220


Tiradentes(MG) Brasil Nov-2010 pages:322

Abstract: A prevenção de interferência eletromagnética (EMI)

é um tema em crescente demanda devido à abundância de

fontes potenciais de interferências próximas a dispositivos

eletrônicos suscetíveis, presentes no ambiente hospitalar.

Equipamentos terapêuticos e de diagnóstico médico por

imagem tendem a interferir uns nos outros em função dos altos

níveis de potência envolvidos, e da possibilidade de

acoplamento entre si e com dispositivos de telecomunicações

[1]. Sistemas de imagem por ressonância magnética (MRI) são

ferramentas diagnósticas poderosas e por isso são cada vez

mais populares em unidades de saúde, porém estão entre as

tecnologias suscetíveis de EMI e geradoras de interferência de

rádio frequência (RFI). Para um funcionamento seguro e

confiável de sistemas de MRI é necessário uma blindagem de

RFI para garantir que a imagem do equipamento não seja

afetada por interferências externas causadas por sinais de

emissoras de rádios e outros equipamentos que trabalham na

faixa de frequências entre 10 e 150 MHz. Em alguns casos a

utilização de blindagem magnética se faz igualmente

necessária, principalmente quando o sistema de MRI é

instalado próximo a fontes de campos magnéticos potentes na

faixa de 50/60 Hz (e.g. transformadores, motores elétricos,

cabos de potência, entre outros) [2]. Blindar campos

magnéticos de baixa frequência é um problema não totalmente

resolvido em função das dificuldades práticas na construção de

blindagens eficientes. Blindagens por absorção normalmente

necessitam a instalação de paredes espessas, construídas com

materiais caros, porém, blindagens com base no princípio da

indução de corrente podem ser razoavelmente eficazes em

frequências de 50/60 Hz, se construídas com materiais

condutivos próximas às fontes de origem do campo [3]. Cobre

ou alumínio são utilizados neste tipo de solução, e podem ser

vantajosos na comparação com os materiais ferromagnéticos

tradicionais para conter os campos magnéticos gerado por

sistemas de MRI [4] [5].

Keywords: Blindagem magnética, Interferência

eletromagnética, Ambiente hospitalar.

74 Sinopse da FEEC

Time and angular variations in different neuromuscular electrical stimulation profiles Eddy Krueger-Beck, Eduardo M. Scheeren, Guilherme N.

Nogueira-Neto, Eduardo B. Neves, Vera Lúcia Silveira Nantes

Button, and Percy Nohama


(CBEB 2010) - ISBN: 2179-3220



Abstract: Muscle fatigue and/or motoneurons adaptation

during neuromuscular electrical stimulation (NMES) are

characterized by an ineffectiveness and short-term use ability.

In this study, we evaluated the efficiency of five NMES profiles

randomly applied to the quadriceps muscle of healthy

volunteers (N=10). Each profile had 1 kHz pulses (100 µs or

200 µs on and 900 µs or 800 µs off, respectively) with burst

frequencies of 50 Hz (3 ms on and 17 ms off) or 70 Hz (3 ms

on and 11 ms off). Better results to maintain knee angle were

obtained with 50 Hz burst frequency. Time and angular

variation during NMES are reliable to assess muscular fatigue

and/or motoneurons adaptation.

Keywords: NMES, electrogoniometer, fatigue

Utilização do coeficiente aparente de difusão obtido através de imagens de ressonância magnética na diferenciação e caracterização de tumores cerebrais in vivo Edna Marina Souza, Gabriela Castellano, Eduardo Tavares

Costa


(CBEB 2010) - ISBN: 2179-3220



Abstract: In diffusion-weighted magnetic resonance imaging

(DWI), the contrast is determined by the random microscopic

motion of water protons. In general, pathologic processes, such

as neoplasic cell changes, tend to alter the magnitude of

structural organization by destruction or reorganization of

membranous elements or by a change in cellularity. These

changes will also have an impact on proton mobility, which can

be followed up by DWI. From DWI is obtained the ADC

(Apparent Diffusion Coefficient) map, which is a representation

of the magnitude of water diffusion at the points of a given

region of interest (ROI). The purpose of this study was to

develop a tool for computation of ADC maps and their

application to the characterization of the following brain

tumors: multiform glioblastoma and meningioma. The mean

ADC values found on meningioma (5.03±0, 67)x10-4 mm2/s,

glioblastoma (2.83±0, 45)x10-4 mm2/s and controls

(8.65±0.98)x10-4 mm2/s allowed the differentiation between

these types of tumors and between tumors and healthy brain

tissues.

Keywords: ressonância magnética, difusão, tumores

cerebrais


A Locality Sensitive Hashing Approach for Conceptual Classificat Luciano Bernardes De Paula, Rodolfo Da Silva Villaça,

Mauricio Ferreira Magalhaes

In: Fourth IEEE International Conference on Semantic

Computing - ICSC 2010

Pittsburgh--USA Sep-2010 pp:408-413

Abstract: The increasing volume of semantic content

available in the Web, generally classified by concept

hierarchies or simple ontologies, turns the searching and

reasoning upon these data a great challenge. Generally, a search

in Semantic Web may not be addressed to a specific document,

but to a group of data classified in the same concept. Several

structures used to distribute data, e.g. P2P networks, use hash

values to identify these data, without maintaining the semantic

values of the stored data. This paper contributes by proposing

the creation of hash values that keep similar data stored near to

each other in a P2P network, reducing the effort to retrieve

similar data. The proposed hash values are derived from the

data classification based on ontologies, using locality sensitive

hashing (LSH) functions.

Keywords: Locality Sensitive Hashing (LSH), ontology,

Peer to Peer Networks

A Platform for Networked Robotics. Eleri Cardozo, Eliane Gomes Guimarães, Ricardo Alves De

Souza, Lucio Agostinho Rocha, Fernando Paolieri Neto,

Fernando Pinho

In: International Conference on Intelligent Robots and Systems

- IROS - ISBN: 978-1-4244-6674-0

Taiwan, China Oct-2010 pp:1000 - 1005 doi: 10.1109/IROS.2010.5650323

Abstract: Most of the environments where mobile robots are

deployed offer a comprehensive networking infrastructure. In

order to take part of these environments, mobile robots must

enhance not only their communication capabilities, but also

their interaction capabilities. Current robotic frameworks are

oriented to gather data from the robotic sensors and to act on

the robot's actuators. In other words, such frameworks are

oriented to perform embedded control functions. In order to

provide mobile robots with enhanced interaction capabilities

robotic applications must rely on networking solutions focusing

on integration, communication, and security. This paper

presents a platform for networked robotics that favors the

integration of mobile robots with other networked devices,

providing a secure and federated access to the mobile robots.

Keywords: embedded control functions, enhanced

interaction capabilities robotic applications, mobile

robots, networked devices, networked robotics, robot

actuators, robotic sensors

A Proposal for an XOR-based Flat Routing Mechanism in Internet-like Topologies Rafael Pasquini, Fabio Luciano Verdi, Rodolfo Oliveira,

Mauricio Ferreira Magalhaes, Annikki Welin

In: 2010 Global Communications Conference Exhibition &

Industry Forum - IEEE GLOBECOM 2010

Miami-Flórida-USA Dec-2010 pp:1-6

Abstract: A frequent subject in forums, academia and

industry is the evolution of the Internet in terms of routing.

Basically, the scalability in the Default Free Zone related to (1)

the growing rate of the routing tables and (2) the convergence

of the routing system, are pointed by routing experts as the

main concerns of the current mechanism. Several approaches

have emerged, but they normally require a mapping system to

translate from identifiers to locators (IP). We contribute with

this discussion by introducing our XOR-based Flat Routing

mechanism for Internet-like topologies. Essentially, the

proposed mechanism routes directly on top of flat ASes

identifiers, eliminating the need for mapping systems. In this

work we propose a mechanism for building the routing tables

over the XOR-based scenario in conjunction with a reachability

service developed using the concepts of Landmark and Bloom

filters. The proposal is evaluated using our developed

emulation tool under five different Internet-like topologies

ranging from 512 to 8192 nodes

Keywords: Flat Routing, Landmark, Bloom Filters, New

Internet Architectures

Adaptive Digital Processing in On-Channel Repeaters for Digital Television Broadcast Eduardo Rocha De Souza, José Matias Lemes Filho, Luis

Geraldo Pedroso Meloni

In: 13 International Symposium on Wireless Personal

Multimedia Communications ISWPMC

http://dx.doi.org/10.1109/IROS.2010.5650323


Recife, PE Oct-2010 pp:1-5

Abstract: This paper shows a review on the evolution of On-

Channel repeaters (OCR) in single-frequency-network

broadcast. Theoretical analysis of the random positive-feedback

channel created by OCR is presented, and a parallel to the

Rayleigh- Channel theory is also drawn. Some analysis are

performed on the Digital-OCR case, and equations that estimate

the minimum SIR and minimum MER achievable for a given

number of bits in the ADC of a Digital-OCR implementation

are derived. These results are important when testing or in the

project of a Digital-OCR implementation.

Agrupamento sensível à densidade para a quantização de sinais de fala Ricardo Paranhos Velloso Violato, Fernando José Von Zuben,

Flávio Olmos Simões, Mário Uliani Neto, Edson José Nagle,

Fernando Oscar Runstein, Leandro de Campos Teixeira Gomes

In: XXIX Congresso Ibero-Latino-Americano de Métodos

Computacionais em Engenharia (CILAMCE)

Búzios - RJ Nov-2010 pp:1-6

Abstract: Este artigo descreve uma técnica de compressão de

bases de dados de fala baseada em quantização vetorial, na qual

um algoritmo de agrupamento sensível à densidade amostral é

utilizado para construir um codebook a partir dos quadros de

fala da base. O agrupamento é realizado por um algoritmo

imuno-inspirado (ARIA - Adaptive Radius Immune

Algorithm), especificamente voltado para casos em que os

grupos apresentam densidades amostrais distintas. São também

propostas adaptações no algoritmo visando ganho de

desempenho. O objetivo principal do processo de quantização é

conseguir uma alta taxa de compressão da base, com um

mínimo de perda de qualidade perceptível.

Keywords: Quantização vetorial, Compressão de fala,

Síntese de fala, Algoritmo de agrupamento sensível à

densidade, Sistemas imunológicos artificiais

An Embedded Audio Decoder for the ISDB-T Vinicius José Andrade Braga, José Matias Lemes Filho, Luis

Geraldo Pedroso Meloni




Abstract: This paper presents an implementation of the audio

codec High-Efficiency Advanced Audio Coding version 2

(HEAAC v2) in an embedded system using the Blackfin Digital

Signal Processor. Some optimization techniques are applied to

conceive an efficient embedded implementation aiming to

achieve requirements of real-time applications. Some

performance analysis are also presented for comparison

purposes to other implementations.

Análise Comportamental de Código Malicioso através da Monitoração de Chamadas de Sistema e Tráfego de Rede Dario Simões Fernandes Filho, André Ricardo Abed Grégio,

Vitor Afonso, Rafael D. C. Santos, Mario Jino, Paulo Licio De

Geus

In: Simpósio Brasileiro de Segurança da Informação e de

Sistemas Computacionais (SBSeg)

Fortaleza, CE Out-2010 pp:311-324

Abstract: Código malicioso (malware) disseminado através da

Internet—vírus, worms, trojans—é a maior ameaça atual à

segurança da informação e um negócio lucrativo para

criminosos. Há abordagens para analisar malware que

monitoram suas ações durante a execução em ambiente

controlado, permitindo identificar comportamentos maliciosos.

Neste artigo, propõe-se uma ferramenta de análise

comportamental de malware não intrusiva, a qual amplia a

análise a exemplares que contornam as abordagens atuais e

corrige alguns problemas presentes nestas, preenchendo assim

uma lacuna na área.

Attack Trees Modeling for Security Tests in Web Applications Plinio Cesar Simões Fernandes, Tânia Basso, Regina Maria De

Moraes, Mario Jino

In: 4th Brazilian Workshop on Systematic and Automated

Software Testing - SAST

Natal-RN-Brasil Nov-2010 pp:1-10

Abstract: Security vulnerabilities in Web applications,

when exploited by attackers, can cause large damages.

Thus, testing this kind of applications against security

vulnerabilities is an important activity. To help

performing security tests, this paper brings the attack

trees modeling to exploit three types of security

vulnerabilities that are, nowadays, considered critical. A

case study was performed, in which real applications are

tested against the security vulnerabilities based on test

cases derived from the attack trees. Results show that

modeling using attack trees is very useful to security tests

and can provide, many times, more effective results than

some automatic Web vulnerabilities scanner tools can

Keywords: Security Vulnerability, Attack Tree

Modeling, Security Test

Compact 2D Facial Animation Based on Context-Dependent Visemes Paula Dornhofer Paro Costa, José Mario De Martino

In: 2nd International Symposium on Facial Analysis and

Animation - ACM/SSPNET - ISBN: 978-1-4503-0388-0

Edinburgh UK Oct-2010 pp:18-18 doi: 10.1145/1924035.1924047

Abstract: The expansion of mobile communications and the

technological evolution of portable devices, raised new

applications possibilities that demands the development of

more efficient and intuitive interfaces.

Context dependent visemes: a new approach to obtain realistic 2D facial animation from a reduced image database. Paula Dornhofer Paro Costa, José Mario De Martino

In: 23th SIBGRAPI 2010 - Conference on Graphics, Patterns

and Images

Gramado, RS Sep-2010 pp:1-6

Abstract: The arise of a new reality where information is

accessed ubiquitously from a variety of different devices

demands the development of more eficient and intuitive

humanmachine interfaces. In this context, speech synchronized

facial animation research aims the development of interactive

talkingheads capable of reproducing the natural and intuitive

faceto- face communication mechanisms. This paper describes

a novel approach to the image-based morphing between

visemes synthesis strategy through the use of context-

dependent visemes capable of modeling speech coarticulation

effects. The proposed approach was validated through the

implementation of a videorealistic 2D speech synchronized

facial animation system for Brazilian Portuguese based on an

image database of just 34 photographs and integrated to a text-

to-speech (TTS) synthesizer. Speech intelligibility tests results

show that the level of videorealism obtained by the system is

capable of improving message comprehension when audio is

degenerated by noise, with results similar to the obtained with a

video of a real face. The proposed methodology can be adapted

to deliver videorealistic animations on devices with limited

memory and processing capacities such as mobile phones,

PDAs (Personal Digital Assistants) or digital TV set-top boxes.

Keywords: facial animation, image-based, 2D-

morphing, context-dependent visemes.

http://dx.doi.org/10.1145/1924035.1924047

76 Sinopse da FEEC

Design of Trace-Based Split Array Caches for Embedded Appications Marina Tachibana, Alice Maria Bastos Hubinger Tokarnia

In: 13th Conference on Digital System Design - EUROMICRO - ISBN: 978-1-4244-7839-2

Lille, France Sep-2010 pp:1-7 doi: 10.1109/DSD.2010.33

Abstract: Since many embedded systems execute a predefined

set of programs, tuning system components to application

programs and data is the approach chosen by many design

techniques to optimize performance and power consumption. In

this paper, we propose a method based on the analysis of

accesses to vector, arrays, and other complex data structures to

design a size-constrained two-partition array cache. This

method reorganizes the ways of set-associative arrays caches

into partitions with different line sizes and defines array-

partition mappings so as to minimize the average memory

access energy-delay product. Experimental results have shown

that these split array caches have lower average energy-delay

product for memory accesses as compared with unified set-

associative array caches of the same size. For an MPEG-2

decoder, even with no parallel accesses to cache partitions, the

average memory access energy-delay product of an 8K-byte

trace-based split array cache is reduced by 50% as compared to

that of the unified set-associative array cache with the lowest

energy-delay product. If 25% of the accesses occur in pairs,

there is an additional reduction of 9%.

Keywords: design space exploration, embedded cache

design, embedded system design, trace-based design

algorithm

Expressive Audiovisual SMS Reading Aléx Garcia Gonçalves, José Mario De Martino

In: 2nd International Symposium on Facial Analysis and

Animation - ACM/SSPNET

Edinburg UK Oct-2010 pp:16-16 doi: 10.1145/1924035.1924045

Abstract: Cell Phone Text Message (SMS) is a widely used

communication service nowadays. The service is extensively

used as a fast and efficient way for people to send daily

communications to family members and friends, setup

appointments, report something that has happened, comment on

some social network topic, express feelings, etc.

In-Packet Bloom Filter based Data Center Networking with Distributed OpenFlow Controllers Carlos Alberto Bráz Macapuna, Christian Rodolfo Esteve

Rothenberg, Mauricio Ferreira Magalhaes




Abstract: This paper discusses a novel data center architecture

based on in-packet Bloom filters to perform Valiant load

balanced packet forwarding enabled by two support services to

distribute the directory and topology state of OpenFlow

controller applications. By deploying an army of Rack

Managers acting as OpenFlow controllers, the proposed

architecture promises scalability, performance and fault-

tolerance. We conjecture that packet forwarding itself may

become a cloud internal service implemented by leveraging

cloud application best practices such as low-latency, highly-

available, key-value storage systems. Moreover, we contribute

to demystifying the argument that the centralized controller

model of OpenFlow networks is prone to a single point of

failure and show that direct network controllers can be

physically distributed, yielding a ‖sweet spot between fully

distributed and centralized networking paradigms.

Keywords: OpenFlow, Network Centralized Control,

Bloom Filters, Data centers

Organização de Dados Multimídia para Busca Conceitual Baseada em Ontologia Luciano Bernardes De Paula, Rodolfo Da Silva Villaça,


In: Simpósio Brasileiro de Sistemas Multimídia e Web –

WebMedia

Belo Horizonte-MG-Brasil Out-2010 pp:1-6

Abstract: The current available large volume of multimedia

data, semantically annotated, from several different sources,

generates new issues about storing and retrieval of those data.

In this scenario, it is common to use simple ontologies to

classify data, creating a relationship between them, that

relationship may be measured by a similarity index. The

contribution of this paper is to propose a way to organize

multimedia data by its conceptual classification, using LSH

(Locality Sensitive Hashing) functions, facilitating the

conceptual search in P2P networks.

Keywords: Locality Sensitive Hashing (LSH), ontology,

Peer to Peer Networks

Piece Fingerprinting: Binding Content and Data Blocks Together in Peer-to-peer Networks Walter Wong, Mauricio Ferreira Magalhaes, Jussi

Kangasharju




Abstract: Peer-to-peer systems provide a scalable content

distribution environment where each peer contributes with a

share of resources in the distributed system. The efficiency of

peerto- peer networks comes from the file segmentation

procedure, allowing peers to redistribute small pieces of the

original file as soon as they finish downloading them instead of

waiting for the complete file download. Moreover, the

decentralized fashion of the paradigm with multiple sources

makes it scalable and robust under high churn. Due to the

popularity of such systems, many attacks such as content

pollution arose, targeting the content integrity by inserting

bogus data in the network to increase the download time and

bandwidth consumption. In this paper we present the piece

fingerprinting mechanism, a new integrity verification

procedure that algorithmically binds all pieces together and

relates them to the complete file. Each data block resulted from

the segmentation of a large file has a fingerprint indicating

whether a block belongs to the content file and also allows the

integrity verification of specific parts of the content. The

mechanism allows the early detection and correction of the

corrupted blocks only, reducing the download time and

bandwidth consumption which would be spent redownloading

larger pieces. The analytical evaluation shows that the

fingerprinting mechanism has low overhead, usually less than

1% of the file size, and can reduce the bandwidth consumption

by 90% in the best case by saving the amount of bandwidth

consumed from the re-downloaded pieces.

Keywords: Merkle Trees, Content Networks, Peer to

Peer Networks

Seleção de Teste de Regressão com Dados Históricos Camila Socolowski de Almeida, Mario Jino

In: 4th Brazilian Workshop on Systematic and Automated

Software Testing - SAST

Natal-RN-Brasil Nov-2010 pp:1-6

Abstract: Regression testing is applied to ensure

software quality across multiple versions. To minimize

its cost, test cases with higher capability of detecting

faults should be selected, keeping the efficiency of the

test suite resulting from the selection. In this paper, we

propose an approach in which historical data are used as

a selection technique in regression testing. The approach

http://dx.doi.org/10.1109/DSD.2010.33

http://dx.doi.org/10.1145/1924035.1924045


feasibility and usefulness are validated through its

application to test a real world software.

Keywords: regression testing, test case selection

techniques, historical data, software reliability.

Teste Colaborativo no Software Público Brasileiro Paulo Marcos Siqueira Bueno, Miguel De Teive E Argollo

Junior, Mario Jino, Adalberto Nobiato Crespo, Celso Aleixo

De Barros

In: 2010 Jornadas Iberoamericanas de Ingeniería de Software

e Ingeniería Del Conocimento - JIISIC - ISBN: 9786077070962

Mérida-Yucatán-Mexico Nov-2010 pp:97-106

Abstract: Propõe-se um modelo para o Teste Colaborativo de

Software que busca contribuir para a eficiência e a eficácia do

teste de software em situações em que o trabalho conjunto para

realizar o teste ocorre em ambientes distintos. Isto torna a

colaboração – inerente às atividades de teste – um desafio ainda

maior. A proposta baseia-se no modelo de colaboração 3C e

pode contribuir em iniciativas de teste de software

desenvolvido globalmente e de teste de software de código

aberto. Este modelo está sendo desenvolvido no contexto do

Software Público Brasileiro.

Keywords: Teste de Software, Engenharia de Software

Colaborativa, Teste Colaborativo de Software, Software

Público Brasileiro

Towards Verifiable Parallel Content Retrieval Walter Wong, Mauricio Ferreira Magalhães, Jussi

Kangasharju

In: 6th Workshop on Secure Network Protocols - NPSec - ISBN: 978-1-4244-8916-9

Kyoto - Osaka - Japan Oct-2010 doi: 10.1109/NPSEC.2010.5634450

Abstract: Many software vendors are providing mechanisms

for parallel content retrieval using multiple connections, e.g.,

parallel HTTP channels, to increase the availability and

reliability of the download procedure. At the same time, there is

no native verification mechanism to support simultaneous

content verification from multiple sources. While it is possible

to set-up multiple TLS tunnels with different sources, there is

no guarantee that the data itself is authentic since the trust is

placed on the connection and not in the data itself. In this paper

we present a parallel verification mechanism based on hash

trees, allowing clients to authenticate data segments regardless

of the container from where they were retrieved from, but just

with the original provider. Some benefits of the proposed

mechanism include low CPU processing costs, low verification

overhead and possibility to support legacy data.

Keywords: Computer Communications, Security,

Authentication

Electrical Energy

A Fuzzy Approach to Reactive Compensation in Electrical Energy Distribution Systems with Nonlinear Loads Marina B. Duque, Carlos Alberto Favarin. Murari, Fernando

D. Penha




Brasil Sep-2010 pp:2144- 2151

Abstract: A fuzzy decision model to solve the problem of

location and size of shunt capacitors for unbalanced distribution

system with harmonic sources is presented. The problem is

formulated as a fuzzy dynamic programming problem of the

minimization of three-phase power loss and capacitor cost

under the constraints of voltage limits and total voltage

harmonic distortion per phase. So much the function objective

as the constraints sets of the overall problem are modeled by

fuzzy sets based on knowledge of planer about system and

whose membership functions values are obtained from the

results of three-phase harmonic load flow analysis. The

harmonic load flow modeling can takes into account the skin

effect of conductors at higher frequencies, coupling mutual

between phases and the presence of multiple and different

harmonic sources.

Keywords: Capacitor placement, harmonic, unbalanced

network, fuzzy logic decision, reactive compensation

A Guide for Synchronous Generator Parameters Determination Using Dunamic Simulations Based on IEEE Standards José Luis Azcue Puma, Ernesto Ruppert Filho, Ferando

Cardoso Fajoni

In: XIX International Conference on Electrical Machines - ISBN: 978-1-4244-4174-7

Roma, Italy Sep-2010 pp:1 - 6 doi: 10.1109/ICELMACH.2010.5607986

Abstract: This paper shows, through simulations using the

software Matlab/Simulink, its library Simpowersystems and the

standars IEEE 115-1995, IEEE 1110-2002, how to perform

load rejection tests for salient pole synchronous generator and

sudden short-circuit test for cylindrical rotor synchronous

generator and how to obtain the values of the synchronous

generator electrical operational parameters which are important

data to perform generator and electrical power system dynamic

studies. The paper discuss the d-axis load rejection test, the q-

axis load rejection test, the arbitrary axis load rejection test and

sudden short-circuit test, saturation is not considered.

Keywords: Electrical machines, Synchronous generator

simulation, load rejection test, parameters

determination, short-circuit test

Alocação Ótima de bancos de capacitores em redes de distribuição primária e secundária incluindo restrições de ressonância Cresencio Silvio Segura Salas, Luiz Carlos Pereira da Silva,

Rubén Augusto Romero Lázaro




Brasil Set-2010 pp:4007-4013

Abstract: This article presents a methodology for

optimization of capacitors placement in primary and secondary

distribution systems altogether, including resonance constraints

due to the installation of new capacitors. Resonance indices

were used based on IEEE standards that recommend harmonic

content limits on the point of common coupling and capacitors

operating limits as well. In addition, the proposal considers the

capacitors lifetime when evaluating the objective function. A

specialized genetic algorithm was used to solve the

optimization problem. The tests performed show how important

it is to include a resonance analysis of the most common

harmonic frequencies existing in a system within the problem

constraints.

Análise da influência da prática de eliminação de faltas nos principais índices de confiabilidade e qualidade de energia em modernos sistemas de distribuição Eline A. C. Barbosa, Fernanda C. L. Trindade, Paulo C. M.

Meira, Walmir Freitas, André Morelato




Brasil Sep-2010 pp:4170-4175

Abstract: Distribution systems commonly use feeder auto-

reclosing scheme to minimize the impact of temporary faults

and to improve the reliability in power supplying. In recent

http://dx.doi.org/10.1109/NPSEC.2010.5634450

http://dx.doi.org/10.1109/ICELMACH.2010.5607986

78 Sinopse da FEEC

years, however, more and more utilities started to question this

practice as the loads in current systems have become very

sensitive to momentary interruptions. Auto-reclosing can create

momentary interruptions to a large number of customers,

yielding bad power quality consequences. As a result, some

utilities are trying to eliminate the auto-reclosing practice.

However, eliminating the practice implies a fundamental

change in planning and operating a power distribution system.

It seems that one cannot achieve simultaneous improvement on

both power reliability and power quality using auto-reclosing.

In view of the far-reaching impact of this issue, this work

conducts a survey as a starting point to prepare industry to deal

with the issue in a proactive and strategic manner.

Keywords: Power quality, reliability, distribution

systems, reclosers, overcurrent protection.

Análise da necessidade de alteração dos ajustes dos relés de sobrecorrente de instalações industriais com geradores síncronos após a ocorrência de ilhamento F. Trindade, Madson Cortes De Almeida, Walmir De Freitas

Filho




Brasil Sep-2010 pp:2441-2446

Abstract: With the advance of digital relays, adaptive

protection schemes have become reality. This type of protection

schemes can be useful in industrial systems with synchronous

generators that operate in both modes: parallel and isolated

(islanded). In this context, it is important to select the relays

that must have their settings automatically changed based on

the system operation condition. This work presents a simple

classification approach to select the relays to be used in the

adaptive scheme. Indeed, the approach selects the branches

protected by overcurrent protection whose relays must be

adaptively set. This classification is based on short-circuit

studies. This scheme improves the selectivity and coordination

of overcurrent protection schemes since it is not necessary to

find a solution to meet both parallel and islanded operation. The

proposed approach is successful applied to a real Brazilian

industrial plant with three cogeneration units.

Keywords: Distributed Generation, Industrial Plants,

Adaptive Protection Scheme, Synchronous Generator.

Análise de redes de distribuição trifásicas com incertezas representadas por conjuntos nebulosos Patrícia L. Cavalcante, Carlos Alberto Favarin Murari, Silvio

S. Segura




Brasil Set-2010 pp:2016-2023

Abstract: The research and development of electric and

mathematical models for the components of the electric

networks and for the loads contribute for the computer

simulation of the electric power systems that it happens in the

smallest time and results in compatible values with the reality.

This is the subject of this research that we describe in this

article, where the main objective was the development of a

three-phase load flow for the analysis of electric power

distribution networks with some variables that are not

deterministic, particularly the loads. In this sense, the imprecise

variables were represented as fuzzy numbers (in the bell form)

and it is presented a Specialized Three-Phase Load Flow that

incorporates fuzzy sets and respective mathematical operations.

The obtained results confirm the good performance of this new

method.

Keywords: Three-phase power flow, uncertainties, fuzzy

numbers

Aplicação do controlador ipfc para o amortecimento de oscilações eletromecânicas em sistemas de potência Danilo B. do Valle, Igor Kopcak, Vivaldo F. da Costa




Brasil Set-2010 pp:3383-3390

Abstract: This paper evaluates the effectiveness of the

Interline Power Flow Controller (IPFC) for improving small-

signal stability of electric power systems. The IPFC power

injection model and its differential equations are included in the

power flow. The dynamic analysis is performed using the

power sensitivity model. Simulations in a two area test system

show that the IPFC equipped with a POD can provide the

damping of the critical oscillation modes, improving the system

dynamic performance, in addition to the flexibility to control

the transmission lines power flows.

Keywords: FACTS, IPFC, POD, Power Systems, Small-

signal Stability

Conteúdo Harmônico da Corrente e Tensão de Arcos Elétricos Gerados Artificialmente em Ambiente Não Confinado Maria Cristina Dias Tavares, Jonas Lemos Talaisys, Carlos

Medeiro Portela, Alessandra Benevides Camara




Brasil Sep-2010 pp:1185-1192

Abstract: In this paper the harmonic content of current and

voltage between terminals of 543 electrical arcs artificially

generated were obtained by applying the Windowed Fourier

Transform. This application is based on shifting a window on

the signs in study and calculating the coefficients of the

Discrete Fourier Transform, allowing a time-frequency analysis

of signals. A statistical analysis of the results has permitted the

identification of a harmonic signature of electrical arc.

Keywords: Secondary arc, harmonic analysis, single-

phase autoreclosing, non-permanent faults

Enhancement of Data Rate for User Cooperation Mitchell Omar Calderon Inga, Gustavo Fraidenraich

In: IEEE/SBrT International Telecommunications Symposium

ITS 2010-Rafael Dueire Lins(Ed.) - ISBN: 978-85-89748-05-6

Manaus(AM) Brasil Sep-2010 pp:1 - 6

Abstract: In this paper, we propose a different scheme based

on user cooperation diversity, in which we obtain an increase in

the data rate. In particular, we present performance analysis

using conventional CDMA (code division multiple access)

implementation for two users. Cooperation among users has

been shown to achieve significant gains as compared to a non-

cooperative system. The results presented here show that the

new scheme of cooperation achieves substantial increase of

data rate, keeping the average bit error probability close to

values obtained in [3]. Regarding the number of spreading

codes, there are costs associated with our cooperative scheme,

but even so our proposed strategy leads not only to an increase

in throughput but also to a simpler system.

Keywords: user cooperation, virtual MIMO, bit error

probability.

Estratégia de Controle e Análise do Filtro Híbrido Utilizando um Inversor de Potência Reduzida Newton Soares Da Silva, Jose Antenor Pomilio, Edson Adriano

Vendrusculo






Abstract: This work analyzes the compensation of harmonic

currents through a Hybrid Filter. The Hybrid Filter consists of

an active power filter connected in parallel with the inductor of

a shunt passive tuned filter, resulting a lower voltage and

current stress over the active filter. The paper investigates the

behavior of an open loop control strategy, and discusses the

dimensioning of the power converter. Simulation results verify

the system operation.

Keywords: Hybrid Power Filter, Harmonics

Compensation, Control Modelling

Estratégias de Controle de Conversores para Geração de Ozônio Jakson Paulo Bonaldo, Jose Antenor Pomilio




Brasil Sep-2010 pp:3617-3624

Abstract: This work analyzes the compensation of harmonic

currents through a Hybrid Filter. The Hybrid Filter consists of

an active power filter connected in parallel with the inductor of

a shunt passive tuned filter, resulting a lower voltage and

current stress over the active filter. The paper investigates the

behavior of an open loop control strategy, and discusses the

dimensioning of the power converter. Simulation results verify

the system operation.

Keywords: Power Electronics, Ozone Generation, Poly-

phase Systems

Estudo do comportamento transitório da linha de um pouco mais de meio comprimento de onda submetida a manobras usuais Maria Cristina Dias Tavares, Ricardo Torquato Borges




Brasil Sep-2010 pp:3917-3924

Abstract: In this paper some electromagnetic transients results

in a Transmission Line Greater than the Half-Wavelength are

presented. Actual structures were used on the simulation, a 500

kV - 2600 km line based on Brazilian North-South

Interconnection. The studies concerns on the line energization

maneuver, energization of the transformers at the end of the

line and load rejection. The transients from these maneuvers

were less severe than for lines of few hundreds of kilometers.

Keywords: Long Distance Transmission, Half-

Wavelength, Electromagnetic Transients.

Estudo sobre a redução do consumo de energia no horário de pico via gerenciamento de refrigeradores Glauco Niro, Luiz Carlos Pereira da Silva, Rodrigo Garcia-

Valle




Brasil Set-2010 pp:1237-1243

Abstract: Among the possibilities for the electrical grids of

the future, studies about Smart Grids have been increasing.

Smart grids will incorporate new technologies and can make

electrical systems more efficient and reliable integrating

consumers as active players in the electrical system operation.

This integration, will be one of the pillars for the operation of

this kind of grid and with implementation of digital

measurement and communication systems, the devices will be

able to be managed according utility and consumer’s

convenience. In this paper will be presented a model that

represent a refrigerator and the potential help that these devices

can give in this new kind of grid, through the implementation

of controls that can manage their operation.

Keywords: Smart Grid, Load management, Refrigerator

Genetic Algorithm Search of Absolute Photonic Band Gap in 2D Anisotropic Tellurium Photonic Crystals Gilliard Nardel Malheiros Silveira, Vitaly F. Rodrigues

Esquerre, Hugo Enrique Hernandez Figueroa



Abstract: The finite-element-method and the Genetic-

Algorithm have been used to solve the inverse problem

involving absolute-photonic-band-gap searching and

maximization. Triangular lattices composed by tellurium and

air have been analyzed. We obtained absolute midratio

bandgaps of 23.49%.

Geração Descentralizada de Reservas Operativas a Partir de Resíduos Sólidos Urbanos, Fontes de Energia Renovável Gerardo Miguel Agurto Lescano, Mariella Renata Cumpa

Aurich, Takaaki Ohishi

In: 2010 IEEE/PES T&D 2010 Latin America

São Paulo, SP Nov-2010 pp:1-3

Abstract: Os resíduos sólidos urbanos são uma fonte de

energia renovável, disponível e alternativa com enorme

potencial. Estes resíduos podem ser convertidos em energia por

diversas maneiras, entre elas pela sua queima em caldeiras para

geração de vapor e conseqüente acionamento de uma turbina.

Os Resíduos sólidos Urbanos (RSU) podem ser utilizados como

fonte para a geração de Reservas Operativas como

complemento à eletricidade gerada pelas hidroelétricas em

períodos de seca. As reservas operativas são necessárias para

melhorar o nível de segurança operativo, principalmente em

relação às perdas de unidades geradoras e desvios significativos

na demanda de carga prevista. Usualmente as reservas

operativas são alocadas levando-se em conta somente o aspecto

econômico. Porém, outros fatores devem ser considerados tais

como a sua localização e a sua capacidade de resposta ante uma

variação de carga. Este trabalho analisou tecnicamente algumas

características envolvidas no aproveitamento energético dos

resíduos sólidos e a viabilidade de implementar pequenas

centrais termelétricas próximas aos nós de demanda para a

geração de Reservas Operativas.

Gerenciamento Ótimo de Potência de um Ônibus Elétrico Híbrido Série para Transporte Urbano Juliana Lopes, Jose Antenor Pomilio, Paulo Augusto Valente

Ferreira





Abstract: Series Hybrid Electric Vehicles are a potential

alternative to the fuel consumption and pollutant emissions

reduction when used in public transport vehicles. In this vehicle

the power sources to the electric traction system are composed

of a battery and a unit power represented by the connection of

an internal combustion engine and a generator. In this article,

the power management between the sources of a Series hybrid

electric bus for public transport is analyzed as a non linear

optimization problem. The goal of this problem is the fuel

consumption minimization by the engine while the bus follows

an urban driving cycle. To this end, limits on the power

delivered by the engine and on the battery state of charge are

established. The problem is analyzed from the point of view of

dynamic optimization (optimal control) with finite horizon. The

results showed that is possible reduce the fuel consumption by

the engine when they are compared with results obtained by

power management strategy based on rules.

Keywords: Series Hybrid Electric Vehicle, Power

Management Strategy, Optimal Control.

80 Sinopse da FEEC

INFLUENCE OF ACCURATE SOIL REPRESENTATION FOR TRANSMISSION-LINE PARAMETERS: ANALYSIS BASED ON CARSON’S MODIFIED FORMULATIONS João Bosco Gertrudes, Maria Cristina Dias Tavares, Carlos

Medeiros Portela

In: IEEE Transmission and Distribution Latin America 2010

Sáo Paulo, SP Nov-2010 pp:1-6

Abstract: In this paper the influence of earth’s conductivity

and permittivity frequency dependence are evaluated when

calculating transversal and longitudinal transmission

lines’parameters directly from numerical integration of

Carson’s modified expressions. As an example of the

importance of properly considering the frequency-dependent

soil model, an actual 440 kV single three-phase transmission-

line was represented, comparing the longitudinal and

transversal parameters considering the earth’s conductivity and

permittivity frequency dependence soil model in relation to the

common soil representation with a constant conductivity and

permittivity that can be neglected assuming a low frequency

approximation.

Keywords: Soil model, Line parameters, Frequency

dependence, Electromagnetic transients

Influência dos Parâmetros Transversais de uma Linha de Transmissão na Redução da Corrente de Arco Secundário durante a manobra de abertura monopolar Milton Elvis Zevallos Alcahuaman, Maria Cristina Dias

Tavares

In: IEEE Transmission and Distribution Latin America 2010

São Paulo, SP Set-2010 pp:1-6

Abstract: A successful single-pole opening/reclosure

procedure after single-phase faults in the EHV transmission

lines requires parameters optimization for each transmission

system. This paper shows the influence of transmission line

transverse parameters together with reactive shunt

compensation parameters in the reduction of secondary arc

current after single-pole opening procedure for non-permanents

faults. It is proposed a method to reduce the mutual coupling

between phases in a three-phase system representation at

fundamental frequency. Some simulations of transient

overvoltage for different cases with optimized neutral reactors

were performed with the ATP program.

Keywords: Neutral Reactor, Secondary Arc Current,

Single-Phase Opening Maneuver, Sustained Response,

Three-Phase ABCD Elements, Unbalanced System.

Matriz de transformação real e constante para análise de linhas de transmissão com extensão para duas linhas trifásicas com circuito duplo José C. C Campos, Afonso J. Prado, Sérgio Kurokawa, Luiz F.

Bovolato, José Pissolato Filho




Brasil Set-2010

Abstract: The frequency independent real phase-mode

transformation matrix application is analyzed for typical double

three phase transmission lines. This transformation matrix is

obtained from eigenvector of analyzed line considering this line

in the ideal transposition. Determining the transformation

matrix, it is based on Clarke’s matrix. For transposed double

three phase transmission lines, the real phase-mode

transformation matrix leads to diagonal impedance and

admittance matrices in mode do-main. For untransposed cases,

error analyses are carried out using this constant phase-mode

transformation matrix and comparing to the results obtained

from the eigenvectors.

Keywords: Eigenvector, eigenvalue, frequency,

transmission lines, Clarke’s matrix, phase-mode

transformation

Método baseado em lógica nebulosa para inserção de geração distribuída sob a óptica do perfil de tensão Leonardo A. Gomes, Carlos Alberto Favarin Murari, Ahda P.

G. Pavani




Brasil Set-2010 pp:2775-2782

Abstract: This work consists of proposing a method based on

Fuzzy Logic to obtain an index that classifies the most suitable

buses to connect a distributed generator with an electric power

distribution system. The method has been developed taking

account the difficulty in keeping a suitable voltage profile in

distribution systems, which favors large index values for the

buses where the connection of generators results in a more

suitable voltage profile. Another aspect included in the method

is the minimization of the power losses. Applying a set of fuzzy

rules, the index has been calculated through setting membership

values to the bus voltage and load real power. One of the

advantages of this method is the possibility to classify the

variables into fuzzy sets that allow the linguistic translation of

the system operator’s knowledge and consequently their

experience of operating the system can be employed in the

process of allocating distributed generators in the system. When

compared to traditional techniques, our method does not require

consecutive runs of power flows. It is necessary to obtain the

operating state of the network through only one power flow in

the base case.

Keywords: Distribution networks, distributed

generation, fuzzy logic, uncertainties, fuzzy numbers

Método prático para a avaliação do impacto da partida direta de motores de indução no afundamento de tensão Cecília F. Morais, Diogo Salles, Paulo C. M. Meira, Ahda P.

G. Pavani, Walmir Freitas, Wilsun Xu




Brasil Set-2010 pp:2768-2774

Abstract: The impact of motor starting on power quality can

be assessed using numerous and complex computer dynamic

simulation studies. However, utility engineers have become

more interested in practical techniques that enable fast and

reliable assessment of new motor installation proposals, so that

studies of several cases can be conducted. In this context, the

objective of this paper is to present a graphical method that

consists of simple analytical formulas to determine the

maximum motor size that can be connected to a particular

distribution system without exceeding the acceptable values of

voltage sags established by the utility grid. Basically, the

proposed method provides a curve relating, for a particular

voltage sag permissible limit, the distribution system short-

circuit level to the maximum induction motor size that can be

installed. Additionally, it is possible to determine, through a

sensitivity analysis, the influence of power grid and motor

parameters on the behavior of these curves. The results have

proven to be accurate when compared to those obtained by

repeated electromagnetic transient simulations.

Keywords: Induction motor, motor starting, power

quality, voltage sags


Métodos de Pontos Interiores Aplicados ao problema de Pré-Despacho com Manobras Programadas Silvia Maria Simões de Carvalho, Aurelio Ribeiro Leite de

Oliveira, Christiano Lyra Filho





Abstract: In this work, the primal-dual interior point methods

are used to minimize the DC predispatch generation and

transmission costs and loss on hydroeletric power systems. The

model considers the network topology modification

schedulling. A matrix structure study is also performed

considering the changes that occurs in the system. We stress

that the computational effort to solve a problem with network

topology modification is close to the effort for solving the

problem without it. Computer results with IEEE test and real

Brazilians sytems reinforce this statement. A new network

topology modification simulation of maneuvers through

transmission lines bound reduction is presented. The new

approach is compared with the explicit toppology modification

version.

Keywords: Interior Point Methods, Predispatch,

Hydroeletric Systems.

Modelagem do Interline Power Flow Controller (IPFC) no Fluxo de Carga e Análise de Carregamento do Sistema Do Valle, D. B., Igor Kopcak, Vivaldo Fernando Da Costa

In: III Simpósio Brasileiro de Sistemas Elétricos

Belém, PA Set-2010 pp:1-6

Abstract: O interline power flow controller (IPFC) é a última

geração dos flexible AC transmission systems (FACTS) que se

destina ao controle e gerenciamento dos fluxos de potência em

múltiplas linhas de transmissão numa dada subestação. O

presente artigo apresenta a inclusão deste dispositivo no fluxo

de carga baseado no método convencional de Newton-Raphson.

O modelo de injeção de potência do IPFC é utilizado por

facilitar sua incorporação em programas de fluxo de carga e

fluxo de carga ótimo. Análises de simulações demonstram que

o IPFC pode ser utilizado para resolver problemas complexos

de congestionamentos de fluxos de potência, eliminando

sobrecargas em linhas de transmissão. Entretanto, em situações

particulares o modo de controle de fluxo de potência constante

do IPFC pode diminuir a margem de estabilidade de tensão do

sistema.

Keywords: Flexible AC Transmission Systems (FACTS),

Fluxo de Carga, Gerenciamento de Congestionamento,

Interline Power Flow Controller (IPFC), Sistemas de

Potência.

Modulação por Acionamento Rotativo Aplicado a Inversor Cascata Simétrica Ernesto Kenji Luna, Jose Antenor Pomilio





Abstract: This paper proposes a modulation strategy with the

aim of reducing the commutation frequency in a symmetrical

cascaded multilevel inverter in comparison with traditional

modulation techniques, additionally resulting an uniform

distribution of the commutations, better than in the Phase Shift

modulation. Such improvements allow to increase the converter

power, due to the lower switching devices stress.

Keywords: Multilevel, Modulation Techniques,

Symmetrical Cascaded Multicell Inverter and Pulse

Width Modulation

Newave versus Odin Comparação entre Modelo Estocástico e Determinístico no Planejamento da Operação Energética do Sistema interligado Nacional Monica de Souza Zambelli, André Emilio Toscano, Secundino

Soares Filho, Erinaldo Farias Dos Santos, Luis Noguera





Abstract: This paper presents a comparison between the

NEWAVE model, which employs a stochastic approach by

using Stochastic Dual Dynamic Programming (SDDP), and the

ODIN model (Optimization of Brazilian Interconnected

Hydrothermal Power System), which uses a deterministic

approach with a network flow optimization algorithm. The

ODIN model uses deterministic and nonlinear optimization

with forecasted inflows, with detailed representation of the

hydroelectric system by individual plants. The NEWAVE

model uses an equivalent composite representation of

interconnected subsystems. In order to perform a comparison

on the same terms, the SUISHI-O model was used to

decompose the strategy of the NEWAVE model into

individualized plants. The ODIN model was compared to the

NEWAVE SUISHI-O methodology for a case study based on

data from the deck of CCEE for the PMO of September 2008,

regarding the generation capacity expansion plan for December

2012. The results was obtained by simulation of 70 historical

scenarios, indicating a significantly superior performance by

the ODIN model, which leads to a more security and economic

operation of SIN by more efficient use of water resources.

Keywords: Energy Systems Planning, nonlinear

optimization, stochastic optimization, reservoir

operation, NEWAVE model, ODIN model.

O uso de quadripolos trifásicos na obtenção da resposta sustentada de um sistema elétrico desequilibrado Milton E. Zevallos, Maria C. Tavares




Brasil Set-2010 pp:1901-1908

Abstract: This paper proposes the use of three-phase two-

ports elements to obtain the sustained response of unbalanced

electric power system. Representations of three-phase two-ports

networks for various types of elements of the electrical power

system are described. The methodology is applied to identify

the optimum neutral reactor that minimizes the secondary arc

current in a transmission system, thus enabling the single-phase

open/reclose maneuver implementation.

Keywords: Cascade Association, Sustained Response,

Three-Phase ABCD Elements, Unbalanced System

Otimização do Despacho Integrado da Geração Termoelétrica da produção e Transporte de Gás Natural Elma Pereira Santos, Takaaki Ohishi, Oderson Dias de Mello





Abstract: Natural gas is a fossil fuel that can be used for

electricity generation in thermoelectric power plants. Thus, the

operation of natural gas supply system is affected by the

dispatch of thermoelectric power plants, and operational

constraints in the gas supply system may also affect

thermoelectric plants dispatch. This operational dependence

between these two systems requires a coordinated operation

with the aim of obtaining a more effcient operation. This paper

82 Sinopse da FEEC

presents a model of economic dispatch applied to

thermoelectric power plant and gas supply system considering

the costs of production and transmission of the natural gas and

the costs of electricity generation. The problem is modeled as a

nonlinear mixed problem. For resolution was used a hybrid

approach that combines a model based on Linear Programming

and a Nonlinear Optimization techniques.

Keywords: Natural Gas, Method, Newton - Raphson,

Steam power-plants, Thermoelectricity.

Parâmetros discretos e distribuidos para o estudo de transitórios eletromagnéticos Eduardo C. M. Costa, José Pissolato, Sérgio Kurokawa, José

A. Prado, Luiz F. Bovolato




Brasil Set-2010 pp:3911-3916

Abstract: The present paper proposes a study in state of art for

two principal representations applied to simulate

electromagnetic transients in transmission lines: by lumped

parameters and distributed parameters. In first representation,

the distributed nature of longitudinal electric parameters are

represented by cascade of _ nominal elements and the current

and voltage transients are obtained at any point of the line,

directly in time domain, from a system composed by first order

differential equations easily solved by numerical or analytic

integration methods. The second representation is described

based on distributed electric parameters of the line, in

frequency-domain, and the current and voltage transients are

calculated in time domain from inverse transform of line

hyperbolic functions. Both procedures present advantages and

restrictions which are discussed qualitatively and quantitatively

by present paper, based on reference bibliography and on

transients evaluated in frequency and time domain.

Keywords: Transmission lines, electromagnetic

transients, lumped parameters, distributed parameters

Um procedimento para estimção de parâmetros de linhas de transmissão baseado na teoria de decomposição modal Gislaine A. Asti, Sérgio Kurokawa, Afonso J. Prado, Luiz F.

Bovolato, José Pissolato




Brasil Set-2010

Abstract: The objective of this paper is to show a

methodology to estimate transmission line parameters. The

method is based on the modal decomposition theory and it is

developed starting from currents and voltages measured at the

sending end and receiving end of the line. The procedure has

been used in a 440 kV three-phase line with 100 km. The

results show that the precision of the method depends of the

characteristics of the load that is connected at the receiving end

of the line.

Keywords: Electromagnetic transients, frequency

dependence, modal transformation, phase domain,

transmission line, transmission-line parameters

Uma Nova Abordagem utilizando Métodos de Pontos Interiores com Relaxação Baseada em Barreira Logarítmica Modificada Mayk Vieira Coelho, Anésio dos Santos Jr., Aurélio Ribeiro

Leite de Oliveira





Abstract: O método de barreira logarítmica modificada é

combinado com os métodos de pontos interiores para solução

do fluxo de potência ótimo CC de um sistema de potência

hidrotérmico. O uso de barreira logarítmica modificada

aumenta a região factível do problema, podendo fazer com que

as variáveis assumam valores de fronteira sem que haja

problemas numéricos, como ocorre nos métodos tradicionais de

pontos interiores. Esta combinação de métodos traz uma

mudança no parâmetro de pertubação do método de pontos

interiores, deixando de ser um escalar e se tornando um vetor,

mudando também sua forma de atualização. Além disto, as

direções obtidas atravéz do método de Newton se tornam mais

eficientes, contruindo um novo percurso, muitas vezes mais

curto que o tradicional. A estrutura matricial resultante é

estudada e estudos de caso são feitos utilizando sistemas

elétricos IEEE.

Keywords: Fluxo de Potência Ótimo, Métodos de

Pontos Interiores, Barreira Logarítmica Modificada

Uma representação no espaço de estado e no domínio do tempo para linhas de transmissão trifásicas: estudo dos transitórios eletromagnéticos Sérgio Kurokawa, Luiz F. Bovolato, Afonso J. Prado, Eduardo

C. M. Costa, José Pissolato




Brasil Set-2010

Abstract: The current paper describes a representation of

three-phase transmission lines by state equations in time

domain. The proposed modeling takes into account the

frequency-dependency of line longitudinal parameters. The

function that describes the behavior of line electric parameters

is synthesized from a rational function F(_) and then inserted in

lumped parameters representation by Vector Fitting. The

currents and voltages through the transmission line are

represented by a nonhomogeneous system of first-order

differential equations, presented as state equations. In three-

phase representation, all procedures are performed in modal

domain and afterwards modal values are converted to phase

domain using a modal transformation matrix. The state

equations are solved by numerical integration methods and the

results are compared to results obtained by Microtran (EMTP).

The proposed line representation is applied to simulate

electromagnetic transients from switching operation in a 440

kV three-phase line.

Keywords: Transmission lines, electromagnetic

transients, state space, time domain.

Utilização da Morfologia Matemática na Localização de Faltas em Sistemas de Transmissão de Energia Elétrica Madson Cortes de Almeida, F. Trindade, F, F. Costa, Paulo

Anderson Holanda Cavalcante





Abstract: Este trabalho apresenta uma série de estudos sobre a

aplicação da morfologia matemática no problema de

localização de falhas em sistemas de energia elétrica. Essa

ferramenta foi incluída como parte da técnica de localização de

faltas. Para verificar a robustez da ferramenta, quatro

parâmetros foram variados: a taxa de amostragem dos sinais, a

resistência de falta, o ângulo de incidência da falta e o tamanho

do elemento estruturante dos tipos de filtros morfológicos

avaliados. As simulações foram conduzidas considerando faltas

fase-terra. Os resultados mostram que os filtros morfológicos

são suficientemente robustos para aplicação no problema de

localização de falhas. Adicionalmente, esses filtros são capazes

de mostrar a polaridade das frentes de onda, o que pode

contribuir no processo de localização de faltas.


Keywords: Localização de faltas, morfologia

matemática, sistemas de energia elétrica.


112 Gb/s Co-DP-QPSK Optical Transmission Offline Digital Filtering Analysis Júlio César Medeiros Diniz, Vitor Bedotti Ribeiro, Júlio César

Rodrigues F. De Oliveira, Adolfo Fernandes Herbster, D.M.

Pataca, Aldario Chrestani Bordonalli





Abstract: In this article, a set of digital filtering algorithms for

application in coherent optical transmission based on

dualpolarization quadrature phase-shift keying modulation

scheme is presented. By considering degradation effects in

optical fibers, digital filtering algorithms were developed and

evaluated to provide adequate recovery of transmitted data via

off-line processing. Consequently, phase estimation was

possible in electrical domain since chromatic dispersion and

polarization mode dispersion had previously been compensated

by the algorithms, allowing for long-haul optical transmissions

consisted of high-order modulation formats (2b/s/Hz of spectral

efficiency) with coherent detection.

Keywords: Coherent detection, high speed optical

systems, polarization multiplexing, digital filtering

A Turbo Multiuser Detector Based on Samples Reliability Luís Otávio Mataveli, Celso de Almeida




Abstract: A turbo multiuser detector based on the reliability

of the samples is proposed. Reliability thresholds are used to

classify a sample as reliable or not. The complexity decreases

each time a sample is classified as reliable. The proposed

detector can reach similar performance, when compared to the

turbo multiuser detector, but with smaller complexity.

Performance is evaluated in terms of bit error rate and

complexity obtained by simulation, as a function of signal to

noise ratio and the reliability threshold. We present the

performance results by different processing gain. Consequently

the results can be applied to CDMA and OFDMA systems.

Keywords: Turbo Multiuser Detection, Samples

Reliability, CDMA, OFDMA.

An Adequate Objective Performance Evaluation of Dirac Video Codec Compared to H.264/AVC André Filgueiras de Araujo, Yuzo Iano, Rangel Arthur



Manaus(AM) Brasil Sep-2010

Abstract: Dirac, a relevant new open wavelet-based video

codec, has been released recently. The main contribution of this

paper is an adequate performance evaluation of this codec

compared to the well-known H.264/AVC. This work differs

significantly from previous ones which present unfair and

inconclusive comparisons. Eight videos comprising three

different resolutions with various degrees and kinds of motion

are used to perform the simulations, as well as appropriate

tuning of coding parameters for both codecs. In every case,

H.264’s objective visual quality results outperform Dirac ones,

but some evidences indicate Dirac might provide better

subjective quality.

Keywords: Dirac video codec, H.264, Video Coding,

Vide Compression, Wavelet-based video coding.

An Artificial Immune System for Optical Fiber Based Directional Couplers Multiplexer/Demultiplexers Design Carlos Henrique da Silva Santos, Vitaly F. Rodrigues, Hugo




Abstract: The design of optical-fiber directional couplers

based multiplexers/demultiplexers by using the artificial

immune system for wavelength division multiplexing

applications is presented and validated by the beam propagation

method.

Análise da Aberração Cromática em Lentes Metálicas Dielétricas V. F. Rodríguez-Esquerre, Davi Franco Rêgo, Cosme E. Rubio-

Mercedes, Hugo Enrique Hernández-Figueroa




Vitoria - ES - Brasil Set-2010

Abstract: Lentes metálicas dielétricas permitem a focalização

em subcomprimento de onda na faixa da luz visível ao

infravermelho próximo. A aberração cromática dessas lentes de

nanofendas é analisada detalhadamente utilizando o método dos

elementos finitos (MEF) e camadas perfeitamente casadas

(PML, Perfecly Matched Layers).

Keywords: lentes, nanoplasmônica, óptica integrada.

Analysing network-wide anomalies using dependency graphs and baseline Alexandre De Aguiar Amaral, Bruno Bogaz Zarpelão,

Leonardo De Souza Mendes, Mario Lemes Proença Junior,

Joel José Puga Coelho Rodrigues

In: 18th International Conference on Software,

Telecommunications and Computer Networks (SoftCOM), 2010 - ISBN: 978-1-4244-8663-2

Split-Bol - Island of Brac--Croatia Sep-2010 pp:310-314

Abstract: In this paper, it is presented a solution that performs

the alarm correlation based in the dependencies between the

network devices using baseline or digital signature of network

segment (DSNS). The main objective of this work is to provide

a network-wide view, showing its global status instead of just

presenting the various alarms generated individually for

different network elements. A dependency graph is used in

order to correlate these alarms, increasing the semantic content

of resulting notifications. Besides, we also present a visual

approach for the network administrator, which reflects the

network global status, enabling network administrators to

visualize the anomaly propagation in the network. Tests were

performed in the State University of Londrina network and the

results of the experiments have been widely satisfactory.

Keywords: State University of Londrina network, alarm

correlation, baseline signature, dependency graphs,

digital signature, network segment, network-wide

anomalies

Aperfeiçoamento dos recursos do Programa aplicativo MatVox como ferramenta de suporte ao Sistema Dosvox Henrique Da Mota Silveira, Luiz Cesar Martini

In: XIII Encontro Nacional de Usuários de DOSVOX

Cascavel, PR Out-2010 pp:1-4

Abstract: Este trabalho sugere o software MATVOX como

uma alternativa à falta de recursos voltados para deficientes

visuais, direcionada para as áreas de ciências exatas.

Basicamente, o MATVOX é uma calculadora programável que

faz uso do editor de texto EDIVOX do sistema gratuito

DOSVOX, que é uma plataforma de apoio ao deficiente visual

composta principalmente por um Sistema Operacional que

contém os elementos de interface e síntese de fala para a língua

84 Sinopse da FEEC

Portuguesa; Editor, leitor e impressor/formatador de textos;

Impressor/formatador para Braille; Aplicações de uso geral

como: caderno de contatos, agenda, calculadora, jogos,

utilitários de Internet (FTP, navegador, email); Programas

multimídia; Ampliador de tela para pessoas com visão reduzida

e leitor de janelas para o sistema operacional Windows. A

calculadora foi desenvolvida de tal forma que permite ao

usuário criar algoritmos e cálculos matemáticos. O MATVOX

foi criado no ano de 2010 e este trabalho é uma síntese do

referencial teórico acerca do MATVOX, envolvendo

considerações de aperfeiçoamento e validação da ferramenta.

Application of Security Metrics in a Metropolitan Network: A Case Study Bruno Bogaz Zarpelão, Leonardo De Souza Mendes, Rodrigo

Sanches Miani



Manaus(AM) Brasil Sep-2010 pp:1-6

Abstract: The information security issues in the current

communication networks demand the development of efficient

methods to find security vulnerabilities and facilitate the

decision making process. Security metric is a widely used

concept in this area. The metrics can indicate the actual level of

a specific security target and may determine the actions that

should be taken. This work presents a case study about the

security metrics implementation in the Open Access MAN

(Metropolitan Area Network) of Pedreira, a city located on

southeast of Brazil. The paper also presents a methodology for

data gathering and analysis to support the security metrics

implementation, the security metrics that were used in the case

study, the metrics program results and some discussions about

the benefits and disadvantages of the security metrics usage.

Keywords: Communication systems, Computer network

management, Computer network security, Security

metrics, Open access metropolitan area network

Blind Extraction of the Sparsest Component. Everton Zaccaria Nadalin, André Kazuo Takahata, Leonardo

Tomazeli Duarte, Ricardo Suyama, Romis Ribeiro De Faissol

Attux

In: 2010 Ninth International Conference on latent Variable

Analysis and Signal Separation - LVA/ICA

Aussois - France Sep-2010 pp:394-401

Abstract: In this work, we present a discussion concerning

some fundamental aspects of sparse component analysis (SCA),

a methodology that has been increasingly employed to solve

some challenging signal processing problems. In particular, we

present some insights into the use of L1 norm as a quantifier of

sparseness and its application as a cost function to solve the

blind source separation (BSS) problem. We also provide results

on experiments in which source extraction was successfully

made when we performed a search for sparse components in the

mixtures of sparse signals. Finally, we make an analysis of the

behavior of this approach on scenarios in which the source

signals are not sparse.

Keywords: Blind Source Extraction, Source Separation,

Sparse Component Analysis

Blind Source Separation in Polarization Division Multiplexed Optical Systems Eduardo Rosa, Everton Nadalin, Ricardo Suyama, João

Romano




Abstract: Polarization division multiplexing systems is a

promising technique, able to double the capacity of next

generation optical communication systems. However, the most

common employed algorithms to recover the sources from the

received data have the drawback of losing sources when

polarization dependent loss is present. To tackle this problem,

we propose different approaches based on independent

component analysis algorithms.

Keywords: Polarization division multiplexed optical

systems, blind source separation, independent component

analysis

Capacity Issues for Cognitive Radio Systems Heloisa Pimentel, Paulo Cardieri




Abstract: The development of software radio toward the

cognitive radio brought the hope that the spectrum scarcity

would be finally an issue of the past. Due to the characteristics

of the cognitive operation and environment (including spectrum

sharing), the operation of such a system has to take into account

the interference to and from other wireless systems.

Interference exploited via cognition could also improve spectral

utilization and end-to-end performance, and the interference

channel model could provide a good choice when evaluating

these systems. However, the determination of the capacity

region for the interference channel has been an open problem

for more than 30 years, showing that the fundamental questions

about networks and interference is not well understood until

now. In spite of that, some researchers have already presented

capacity analysis for cognitive radio systems under certain

conditions.

This paper presents a survey of some works done in order to

evaluate the capacity of cognitive radio systems, even if these

have to be restricted by certain particularities.

Keywords: cognitive radio, capacity, interference,

wireless communication, multiple user, spectrum sharing

Capacity of CSMA under Nakagami Fading Elvio João Leonardo, Michel Daoud Yacoub



Manaus(AM) Brasil Sep-2010 pp:1 - 5

Abstract: This paper investigates the throughput performance

of carrier sense multiple access (CSMA) in a packet radio

network and Nakagami fading environment. The approach

considered includes the signal capture model with incoherent

addition of interfering signals. The cases of uniform attenuation

for all terminals (or perfect power control) as well as unequal

average power levels are studied. Analytical and numerical

results are presented.

Keywords: Wireless communication, CSMA, Nakagami

fading.

Caracterização de um Conversor de Comprimento de Onda Baseado em Efeitos Não-Lineares de SOAs Eduardo Cavalcanti Magalhães, Napoleão Dos Santos Ribeiro,

Evandro Conforti, Aldario Chrestani Bordonalli





Abstract: Apresentam-se os resultados relativos à

caracterização experimental de um conversor de comprimento

de onda com um amplificador óptico a semicondutor operando

através das propriedades de mistura de quatro ondas agregadas

à modulação cruzada de ganho. Diagramas de olho e fatores de

qualidade Q foram obtidos para taxas de transmissão de 2 e 7

Gbps, considerando condições iniciais distintas para a diferença

entre os comprimentos de onda dos canais envolvidos no

processo. Em destaque, a conversão foi observada para

situações de até 22 nm de diferença entre os comprimentos de

onda em down-conversion e um fator Q em torno de um valor

médio de cerca de 15 em uma faixa de 16 nm de up-conversion.


Keywords: amplificador óptico a semicondutor (SOA),

conversão em comprimentos de onda, mistura de quatro

ondas, modulação cruzada de ganho.

Development of a Business Intelligence Environment for e-Gov using Open Source Technologies Eduardo Zanoni Marques, Leonardo De Souza Mendes,

Everton Luiz De Almeida Gago Junior, Rodrigo Sanches Miani

In: International Conference on Data Warehousing and

Knowledge Discovery 2010 (DaWaK) - ISBN: 3-642-15104-3

978-3-642-15104-0

Bilbao, Spain Sep-2010 pp:1-6

Abstract: It has become common for modern organizations to

use advanced information systems for helping their daily

operational task. However, there is still a large demand for

software solutions that enable straightforward data analysis

from these systems. Aiming to solve this problem, Business

Intelligence (BI) environments were created. Electronic

Government (e-Gov) systems, which typically work with

governmental operational data, can take great benefits from a

BI environment. Therefore, in e-Gov systems BI tools can be

used, among others, to pursue the following goals: enhance the

relationship between city and state government and the citizen;

help administrating public resources; monitor the impacts of

public policies upon the society. This paper presents a proposal

for creating a BI environment for Electronic Government

systems, using open source technologies with a special

application to Social Welfare, developed for the city of

Campinas, SP, Brazil.

Digital Filtering Algorithms for 112 Gb/s Dual Polarization QPSK optical systems with coherent detection Vitor Bedotti Ribeiro, Júlio César Medeiros Diniz, Júlio César

Rodrigues F. De Oliveira, Adolfo Fernandes Herbster, Aldario

Chrestani Bordonalli


Recife, PE Sep-2010 pp:1-6

Abstract: In this work we implemented and evaluated a set of

algorithms for digital filtering purposes applied to the next

generation of optical systems based on high order modulation

formats, coherent detection and digital signal processing. These

algorithms were capable of enabling optical transmission at 112

Gb/s bit rate using dual polarization and quadrature phase shift

keying at the transmitter and the coherent receiver.

Keywords: receptor coerente, sistema WDM, algoritmos

rastreadores, processamento digital de sinais

Digital Polarization Tracking Algorithms for 100Gb/s Coherent DP-QPSK Transmission Vitor Bedotti Ribeiro, Júlio César Rodrigues F. De Oliveira,

Júlio César Medeiros Diniz, Adolfo Fernandes Herbster, D.M.

Pataca, Aldario Chrestani Bordonalli




Vila Velha-ES-Brasil Sep-2010 pp:725-730

Abstract: In view of optical systems with transmitters

operating in quadrature phase-shift keying and using two

orthogonal polarizations (DP-QPSK), as well as coherent (Co)

detection receivers with offline digital signal processing (DSP),

this work analyzes important digital filtering schemes based on

non-data aided constant modulus algorithms (CMA) for

polarization tracking and linear effects mitigation with and

without differential phase compensation and forward linear

prediction. Simulation results for a Co-DP-QPSK 112-Gb/s link

revealed that the algorithm with taps and differential phase

compensation presented better performance than those of other

standard algorithms.

Keywords: Optical fiber communication, Constant

modulus algorithm, Polarization tracking, Digital signal

processing

Dynamic gain spectrum equalizer for EDFAs in reconfigurable optical networks Vitor Vale Do Nascimento, Júlio César Rodrigues F. De

Oliveira, Vitor Bedotti Ribeiro, Aldario Chrestani Bordonalli

In: Congresso Internacional Frontiers in Optics/Laser Science

Conference of Optical Society of America

San Jose-CA -USA Oct-2010 pp:1-6

Abstract: In this work, an analysis and an experimental

demonstration of a dynamic gain equalizer (DGE) for EDFAs

in reconfigurable optical networks were presented. For a 32-

channel WDM system with one EDFA and different amplifier

gain scenarios, experimental results showed that the DGE

allowed for a power imbalance reduction of 86%, minimizing

EDFA wavelength-gain dependency. The impact of DGEs in an

EDFA cascade was analyzed in terms of simulations. For that, a

32-channels optical link formed by ten 80-km standard optical

fiber spans with one automatic gain controlled EDFA for each

span was assumed. The best OSNR results indicate that power

imbalance can be reduced from 22.1 dB without DGE to around

1.5 dB when DGEs are placed after each EDFA of the cascade.

Keywords: sistema WDM, amplificadores`fibra dopada

com érbio, filtragem óptica.

Electromagnetic Interference Simulation of a Cell Phone in an Aircraft System Using Domain Decomposition Method Juliano Mologni, Marco Antonio Robert Alves, Mateus

Bonadiman, Leandro Percebon, Filipe Baumgratz, Edson

Fonseca, Cesareo de La Rosa Siqueira




Abstract: Laboratorial experiments to investigate the behavior

of numerous embedded avionics installations to onboard

electromagnetic interference (EMI) are extremely complex and

costly. Even if all electronic subsystems in an aircraft are

validated under the electromagnetic compatibility (EMC)

standards, the integration between them can create numerous

points of potential hazards that affects the total electromagnetic

behavior of the entire system, hazards that can be detected only

when the first complete aircraft prototype is available, and

whose resolution at this phase of the development process is

very time consuming and expensive. Numerical techniques

such as the finite element method (FEM) present a reliable

solution to analyze EMI responses enabling additional analysis

of any portable electronic device without impact the in-service

aircraft schedules. FEM technique requires a considerable

computational resource to solve large field problems, and in

order to create a reliable model of an aircraft interior, a new

procedure called domain decomposition method (DDM) was

used taking advantage of parallel processing. In order to

address the concern for cellular phone EMI to an aircraft

monopole antenna and a wiring harness, a full numerical

methodology was developed including actual diagnostic

signals. The study presents complete results regarding EMI and

communication channel analysis addressing the potential

hazards of a cell phone in an aircraft’s electronic system.

Keywords: Domain Decomposition Method (DDM),

Electromagnetic coupling, Electromagnetic Interference

(EMI), Electromagnetic Compatibility (EMC), Finite

Element Method (FEM), Electromagnetic radiation

effects.

86 Sinopse da FEEC

Empirical characterization of wavelength conversion for phase modulated channels based on SOA-FWM properties Eduardo Cavalcanti Magalhães, Evandro Conforti, Aldario



Recife, PE Sep-2010 pp:1-6

Abstract: In this work, experimental results of an empirical

characterization of wavelength conversion of 10-GHz phase

modulated signals based on SOA nonlinear effects, specifically

the FWM, were presented. The wavelength converter based on

FWM presented a range of 8 nm conversion (4 nm in up-

conversion and 4 nm in down-conversion) but was sensitive to

light polarization, with a variation of 6 dB between the worst

and best case analyzed. Future work will evaluate the ability of

FWM conversion when subjected to systems that use digital

modulation in different formats and transmission rates.

Keywords: conversão em comprimento de onda,

amplificadores ópticos semicondutores, mistura de

quatro ondas.

Evaluation of the Effects of Co-Channel Interference on the Bit Error Rate for QPSK and M-QAM Modulations Edgar Eduardo Benitez Olivo, Gina Andrea Quelal Quelal,

Diana Pamela Moya Osorio, Carlos Daniel Altamirano

Carrillo, Celso De Almeida




Abstract: In this paper, a performance analysis for QPSK, 16-

QAM and 64-QAM, modulations in the presence of co-channel

interference is made. At first, an expression of the bit error rate

(BER) for M-PAM as a function of the Eb=N0 ratio in the

presence of K interferers is obtained. The formula from the

BER gotten earlier is used to derive a simplified expression for

the BER of M-QAM modulations. For each modulation

scheme, it is shown that there is a minimum signal to

interference ratio (SIR) for the system does not present a BER

floor. The results obtained show that modulations with higher

order alphabets need high SIR in order to maintain the BER at

satisfactory levels. This analysis can be applied in the

performance evaluation of cellular radio networks, as WiMAX

and LTE.

Keywords: M-PAM, Q-PSK, M-QAM, Co-Channel

Interference, SIR, BER.

Evaluation of the Effects of the Co-Channel Interference on the Bit Error Rate of Cellular Systems for BPSK Modulation Carlos Daniel Altamirano Carrillo, Celso De Almeida



Manaus(AM) Brasil Set-2010 pp:1-6

Abstract: A performance analysis in terms of the bit error rate

for digital systems with co-channel interference is done. In

order to evaluate the effects of the interference on systems

performance, expressions for the bit error rate are obtained for

different scenarios. In these scenarios we consider one, two or

K interferers that have the same power. If K is large, the

interference is gaussian and the interference can be treated as

equivalent noise. Scenarios with two interferers, where one of

them is dominant and where the interference is asynchronous to

the signal are also considered. Although the gaussian

approximation is easy to be obtained, it is considered not a

good model for cellular networks, because the number of main

interferers is in essence one or two. This paper presents an

effective tool to evaluate how much effective are the diverse

schemes proposed to mitigate the co-channel interference in

cellular networks.

Keywords: 2-PAM, BPSK, Co-Channel Interference,

SIR, BER

Linear Quadratic Regulator for a Class of Markovian Jump Systems with Control in Jumps Alessandro N. Vargas, João Y. Ishihara, João Bosco Ribeiro do

Val


Atlanta, GA- USA Dec-2010 pp:2910-2917

Abstract: This paper presents a suboptimal control strategy

for the linear quadratic regulator problem of Markov jump

linear systems subject to control in jumps. The system under

study has a dual switching structure, in a manner that the

system parameters jump according to both a Markov chain and

a given switching control rule. The suboptimal control policy,

derived via dynamic programming argument, relies on a special

set of positive semidefinite matrices, in the sense that the

number of elements of this set increases via a combinatorial

step-by-step argument, applied at each time stage. An example

is presented to illustrate the result.

Keywords: Stochastic optimal control, Switched systems,

Markov processes

Low Complexity Multiuser Detection based on Reliable Samples Celso Iwata Frison, Celso de Almeida

In: 11th IEEE International Symposium on Spread Spectrum

Techniques and Applications - ISSSTA2010 - ISBN: 978-1-

4244-6013-7

Taichung, Taywan Oct-2010 pp:1-6 doi: 10.1109/ISSSTA.2010.5651348

Abstract: A sub-optimum multiuser detector which compares

the received samples to reliability thresholds, in order to

classify them as reliable or non-reliable, is proposed for CDMA

systems. Each one of these classified samples receives a

different management in the detection process. This technique

presents a good trade-off between performance and complexity

in relation to the optimum multiuser detector. In fact, for some

values of the reliability thresholds, the proposed detector

reaches the optimum multiuser detector performance with a

much smaller complexity. Theoretical equations and results of

simulation for the complexity and bit error rate are presented.

The proposed theoretical expressions are very tight when

compared to the respective simulation results.

Low Complexity Multiuser Detection Based on Reliable Samples: a Baseband Analysis Celso Iwata Frison, Celso De Almeida




Abstract: A sub-optimum multiuser detector which compares

the received samples to reliability thresholds, in order to

classify them as reliable or non-reliable, is proposed for

baseband CDMA system. Each one of these classified samples

receives a different management in the detection process. This

technique presents a good trade-off between performance and

complexity in relation to the optimum multiuser detector. In

fact, for some values of the reliability thresholds, the proposed

detector reaches the optimum multiuser detector performance

with a much smaller complexity. Theoretical equations and

results of simulation for the complexity and bit error rate are

presented. The proposed theoretical expressions are very tight

when compared to the respective simulation results.

Keywords: CDMA, Complexity, Multiuser Detection,

Reliability.

http://dx.doi.org/10.1109/ISSSTA.2010.5651348


Macrobends effects in single-mode guidance for hollow-core fibers Daniel Grandin Lona, Arismar Cerqueira Sodre Junior, G.

Stefanini, Hugo Luis Fragnito, Hugo Enrique Hernandez

Figueroa




Vila Velha -ES- Brasil Sep-2010 pp:1 - 6

Abstract: We observed the effects of macrobending loss in a

hollow-core photonic crystal fiber with a core of 6.5μm. It was

obtained a loss of only 0.58 dB for a bending diameter of 4

mm.

Keywords: Photonic Crystal Fibers, hollow-core fiber

(HCPBGF), photonics, optical fibers, bending loss.

MATVOX: um aplicativo para deficientes visuais que proporciona a implementação de algoritmos e cálculos matemáticos em um editor de texto Henrique Da Mota Silveira, Luiz Cesar Martini

In: XXI Simposio Brasileiro de Informática na Educação - ISBN: 21764301

João Pessoa, PB Nov-2010 pp:1-4

Abstract: Este trabalho apresenta o aplicativo MATVOX

como uma alternativa à falta de recursos voltados para

deficientes visuais, tanto para o ensino como para o dia a dia

nas áreas de ciências exatas. Basicamente, o MATVOX é uma

calculadora programável que é funcional a partir do editor de

texto do sistema gratuito DOSVOX, que é um sistema de apoio

ao deficiente visual. A calculadora foi desenvolvida de tal

forma que permite ao usuário criar algoritmos e cálculos

matemáticos. O MATVOX foi criado no ano de 2010 e este

trabalho é um ponto de partida de um projeto de Mestrado para

o aperfeiçoamento e validação da ferramenta como um

poderoso recurso na educação de deficientes visuais.

Modelagem Analítica da Penalidade de Ganho Imposta pela ASE na Faixa Dinâmica de AFDE com Controle Automático de Ganho Adolfo Fernandes Herbster, Júlio César Rodrigues F. De

Oliveira, Aldario Chrestani Bordonalli





Abstract: A técnica de controle automático de ganho (CAG)

em amplificadores utiliza a diferença do sinal de entrada e saída

como referência. Em amplificadores ópticos, os valores dos

sinais de entrada/saída são obtidos pela conversão

optoeletrônica nos fotodetectores, com a finalidade de estimar o

ganho. Com base neste ganho total, o controle é realizado

erroneamente, por desconsiderar a parcela de ASE (amplified

spontaneous emission) que compõem o sinal de entrada/saída.

O nível do sinal de entrada e o ganho alvo desejado são

variáveis que influenciam o nível da ASE no sinal óptico de

saída. Neste trabalho é apresentado um modelo analítico que

quantifica a relação entre a penalidade de ganho, potência de

entrada e o ganho alvo, para um amplificador a fibra dopada

com Érbio (AFDE) com CAG. Por meio deste modelo, o

processo de caracterização prévia necessário para a

compensação da ASE em AFDEs é significativamente

simplificado, proporcionando ganho de tempo e custo na

construção

Keywords: Amplificador a fibra dopada com Érbio,

controle automático de ganho, controle de ganho

eletrônico, redes ópticas.

New Multifractal Traffic Model and Its Impacts on Buffer Queueing Performances Jeferson Stênico, Lee Ling




Abstract: In this paper, we propose a new analytical

expression for estimating byte loss probability at a single server

queue with multi-scale traffic arrivals using Pareto distribution.

In order to make the estimation procedure numerically tractable

without losing the accuracy, we assume and demonstrate that an

exponential model is adequate for representing the relation

between mean square and variance of Pareto distributed traffic

processes under different time scale aggregation. Extensive

experimental tests validate the efficiency and accuracy of the

proposed loss probability estimation approach and its superior

performance for applications in network connection with

respect to some wellknown approaches suggested in the

literature.

Keywords: Multiscale Traffic Modeling, Loss

Probability, network Traffic

New Results for the alpha-mu Multivariate Fading Model Guilherme Silveira Rabelo, Rausley Adriano Amaral De Souza,

Michel Daoud Yacoub

In: 21st Annual IEEE International Symposium on Personal,

Indoor and Mobile Radio Communications, PIMRC 2010

Istambul -Turkey Sep-2010 pp:341 - 346 doi: 10.1109/PIMRC.2010.5671855

Abstract: This paper derives an exact, easily computable

series-type formulation for the multivariate α-µ joint

cumulative distribution function. Then, based on useful and

practical assumptions, alternative, new, simpler formulations

for the α-µ multivariate joint density function and its

corresponding distribution function are provided. The

formulations are still general and yet very simple, assuming

arbitrary parameters and arbitrary correlation among the

marginal α-µ variates. As an application example, the outage

probability of the selection combining scheme is obtained,

again in an exact manner. The results show that only a few

number of terms of the series is sufficient to provide an

excellent agreement between approximate and exact results.

Keywords: α-µ distribution, α-µ distribution, correlated

fading, correlated fading, diversity methods, diversity

methods, joint distributions, joint distributions

O uso do LATEX como parte de um Software dedicado aos usuários Deficientes Visuais objetivando a elaboração de trabalhos científicos envolvendo fórmulas matemáticas Luiz César Martini

In: XIII Encontro Nacional de Usuários de DOSVOX

Cascavel, PR Out-2010 pp:1-6

Abstract: As pessoas portadoras de deficiência visual dispõe

de recursos muito limitados para permitir sua inclusão nas áreas

da matemática e física. Ao longo dos anos, muitos deficientes

visuais têm conseguido entrar em cursos de matemática e afins

nas mais renomadas escolas públicas do país. Contudo a falta

de ferramentas de apoio no campo da matemática tem feito com

que os deficientes visuais, depois de serem aprovados em uma

escola de nível superior, acabem desistindo de frequentar seus

cursos por absoluta falta de recursos que permitam ao

deficiente acompanhar seu curso universitário. Nosso primeiro

trabalho no sentido de melhorar as condições de trabalho dos

deficientes visuais nas áreas envolvendo matemática, foi o

programa aplicativo MatVox que atualmente está sendo

ampliado para oferecer mais possibilidades além das que já

possue. Um outro recurso desejável é a possibilidade de o

deficiente visual redigir, elaborar e ler ele próprio, textos

envolvendo fórmulas matemáticas. Para pessoas videntes, há

vários aplicativos disponíveis para produção de textos

envolvendo fórmulas matemáticas. A ferramenta mais

conhecida é o Word, um aplicativo muito conhecido do

http://dx.doi.org/10.1109/PIMRC.2010.5671855

88 Sinopse da FEEC

Windows. Infelizmente o uso deste aplicativo depende

totalmente da visão, impossibilitando totalmente que o

deficiente visual trabalhe com ele. Contudo existe uma

ferramenta muito mais precisa que o Word que fornece

trabalhos de elevado nível de qualidade, esta ferramenta é o

LATEX. O LATEX, muito conhecido nos meios científicos,

permite a elaboração de trabalhos envolvendo fórmulas

matemáticas com uma qualidade superior ao Word e tem a

vantagem de que as fórmulas são elaboradas na forma de

textos, seguindo uma regra de formação e criando um programa

objeto a partir do qual as fórmulas são convertidas em imagens

e as figuras e textos são coladas no trabalho. O programa

LATEX também permite confeccionar em forma de textos

figuras geométricas que podem ser desenhadas seguindo uma

equação e também permite a inserção de figuras e imagens no

trabalho final. Dessa forma é perfeitamente viável que um

deficiente visual, usando o LATEX, possa redigir seus textos

científicos. Contudo, o LATEX contém um vasto compêndio de

regras de formação que dificulta seu aprendizado. Mesmo para

pessoas videntes exige um certo esforço de aprendizagem para

se utilizar o LATEX o que faz com que inúmeros videntes de

preferência por programas mais fáceis de se trabalhar. Um

outro problema do LATEX para o deficiente visual é a leitura

dos textos elaborados no LATEX que não traduz de forma

adequada a fórmula elaborada em LATEX de maneira a que o

deficiente visual possa ouvir e acompanhar corretamente as

fórmulas e textos elaborados em LATEX. Este trabalho

apresenta uma proposta de inclusão digital do deficiente visual

através da adaptação do LATEX às necessidades de uso pelos

deficientes visuais

Optical Amplitude Multiplexing through Parametric Amplification: An Analysis for the Idler Signal André Costa, Marcelo Abbadel, J. D. Marconi, Felipe Rudge

Barbosa, Edson Moschim




Abstract: Recently a new technique that used parametric

amplification in optical fibers to combine two binary signals

into a single quaternary amplitude-shift keying (4-ASK) signal,

at frequency of signal to be amplified, was proposed. In this

paper, other new technique with use of parametric

amplification, also to combine two binary signals into a single

quaternary amplitude-shift keying (4-ASK) it is proposed,

however, the 4-ASK signal will be generated at idler frequency.

We also develop a theoretical model to predict the power level

distribution of the 4-ASK signals as a function of the extinction

ratios of the input binary signals. Computer simulation results

agree with the predictions of this theoretical model within a 1.3

dB margin. Finally, was also performed some simulation to

compare the propagation between 4-ASK idler signal with 4-

ASK probe signal. This technique could be applied to optically

generate optical packets.

Keywords: Optical signal processing, parametric

amplifiers (PA), quaternary-amplitude shift keying (4 -

ASK).

Optical tweezing double negative spherical particles using arbitrary laser beams in an arbitrary optical regime Leonardo André Ambrósio, Hugo Enrique Hernandez Figueroa

In: 4 International Congress on Advanced Electromagnetic

Materials in Microwaves and Optics (Metamaterials)

Karlsruhe- Germany Sep-2010 pp:1 - 6

Abstract: The fundamental differences between gradient

forces over double-positive (DPS) and double-negative (DNG)

particles in optical trapping are outlined, using the generalized

Lorenz-Mie theory (GLMT) and the integral localized

approximation. For the first time in the literature, we analyze

how a DNG particle behaves under the influence of a Bessel

beam

Optimized Blind Algorithms for Widely Linear Beamforming Adilson Chinatto Jr, Cynthia Junqueira, João Romano




Abstract: The use of array beamforming in modern wireless

communication systems has been increasingly investigated, due

to their potential in rejecting interference and improving the

system capacity. The so-called blind algorithms have been

considered in such application in order to avoid training

procedures and improve the overall transmission throughput.

Most works in the field consider circular signals and classical

linear signal processing framework. However, the alternative

scenario of Widely Linear Processing was shown to be more

suitable under other circularity conditions, particularly in

rectilinear modulations schemes. This paper deals with blind

algorithms for array beamforming in a Widely Linear

Processing framework. We consider the well-known CMA and

NCMA algorithms and derive corresponding Widely Linear

formulations with optimized performance. In addition, we show

that their implementation requires less computational cost than

the original CMA and NCMA. Simulation results confirm that

both proposed algorithms perform better than their strictly

linear counterparts.

Keywords: widely linear processing, blind algorithms,

CMA, NCMA, beamforming

Optimizing Impedance Matching between the Exciter -APEX and the GTEM Chamber Humberto Xavier de Araujo, Luiz Carlos Kretly

In: 26 2010 IEEE 26-th Convention of Electrical and Electronics

Engineers - ISBN: 978-1-4244-8681-6

Eilat- Israel Nov-2010 pp:986 - 990 doi: 10.1109/EEEI.2010.5661925

Abstract: The EMC - Electromagnetic Compatibility for

Electronic Equipment is a critical task in several sectors in the

industrial environment. Different approaches support the

compliance tests and have consolidated standard and

regulations. In many cases, integrated circuits are the mainly

causes of interference in electronics equipments. In this work it

is shown the concept and models for matching the APEX

(exciter) and the GTEM chamber, which is the most important

and critical step on the construction of the system and its

optimization. Also, it is shown the basic concepts to design this

versatile chamber, projected to operate from 500 MHz - 18

GHz, employed in pre-compliance tests and electromagnetic

compatibility for automotive/ electronic boards and integrated

circuits. The GTEM chamber has some advantages over the

others test setups, mainly in economic terms and the operational

frequency range.

Keywords: TEM cells, automotive electronics,

electromagnetic compatibility, electronic equipment

testing, exciters, impedance matching, optimisation

Outage Probability of Multibranch Diversity Receivers with Cochannel Interference in Generalized Fading Scenarios Alexandre Campos Moraes, Daniel Benevides Da Costa,

Michel Daoud Yacoub




Abstract: Wireless systems in a frequency reuse environment

are subject to cochannel interference, and, in order to improve

their performance, diversity techniques are deployed.

Unfortunately, the exact analysis of the outage probability of

equal-gain combining receivers in such a condition is rather

http://dx.doi.org/10.1109/EEEI.2010.5661925


intricate and impracticable, because it involves the evaluation

of multifold nested integrals. In this paper, we propose accurate

approximate formulations for this problem, whose results are

practically indistinguishable from the exact solution. In our

model, the system is composed of M diversity branches and N

arbitrary independent cochannel interferers. Two sets of fading

scenarios, namely eta-μ and kappa-μ, are investigated. The

proposed approach is indeed flexible and accommodates a

variety of mixed fading scenarios for desired and interfering

signals.

Keywords: Approximate formulations, cochannel

interference, diversity systems, generalized fading,

outage probability

Performance of WHT-STC-OFDM in Mobile Frequency Selective Channel Luciano Leonel Mendes, Renato Baldini Filho




Abstract: High data rate systems usually employ Orthogonal

Frequency Division Multiplexing and Space-Time Coding to

improve the performance on a mobile time-variant frequency-

selective channel. Nonlinearities introduced by the power

amplifier can be minimized by performing a Wash- Hadamard

Transform on the data symbol prior the Inverse Fast Fourier

Transform (IFFT) at the transmitter. This procedure reduces the

peak-to-average power ratio of the OFDM symbol. An extra

advantage of the WHT combined with OFDM is the

performance improvement on a frequency-selective channel.

The aim of this paper is to present an analytical expression to

estimate the performance of the WHT-STCOFDM taking into

account the receiver/transmitter mobility, the channel frequency

response and the noise added by the channel. The theoretical

results are corroborated by computer simulations.

Keywords: Time-variant frequency-selective channel,

OFDM, Space-Time Coding, Walsh-Hadamard

Transform.

Quaternary LDPC Codes on OFDM Systems Maria Leopoldina Martins N. S. Gonçalves, Renato Baldini

Filho




Abstract: This paper evaluates the performance of quaternary

LDPC codes associated to OFDM systems. The LDPC codes

are based on a ring Z4 of integers modulo-4. Each OFDM

subcarrier is modulated using a 4-PSK modulation, and each

output symbol of the encoder is mapped onto that modulation.

The performance is evaluated, in terms of BER versus Eb/N0,

for AWGN and frequency-selective fading channels. The

results show good performance when compared to the channel

encoding process of the Brazilian Digital Television System

(SBTVD).

Keywords: Quaternary LDPC code, OFDM, frequency

selective fading

Quaternary Turbo Code on OFDM Systems Renata Mataveli Viti, Renato Baldini Filho




Abstract: This paper analyses the performance of a quaternary

turbo code associated to OFDM systems. The turbo code is

based on two-component recursive systematic convolutional

(RSC) codes defined over a ring Z4 of integers modulo-4. Each

OFDM subcarrier is modulated using a 4-PSK modulation. The

performance is evaluated, in terms of BER versus Eb/N0, for

AWGN, flat and frequency selective fading channels. The

results show good performance when compared to the channel

encoding process of the Brazilian Digital Television System

(SBTVD).

Sistema Imunológico Artificial Aplicado ao Projeto de Acopladores e Demultiplexadores Fotônicos Vitaly F. Rodrigues, Carlos Henrique da Silva Santos, Hugo






Abstract: Este trabalho apresenta a implementação e

aplicação de um algoritmo baseado no sistema imunológico

artificial, que é uma técnica de inteligência computacional, para

a otimização de acopladores direcionais baseados em

multiplexadores.

Keywords: Acopladores, Sistema Imunológico Artificial,

Multiplexadores

Tellurite based PCF with flattened dispersion Gilliard Nardel Malheiros Silveira, José Amilton Mores Junior,

Enver Fernandez Chillcce, Hugo Enrique Hernandez Figueroa,

Hugo Luis Fragnito


Recife - PE- Brasil Sep-2010 pp:1 - 6

Abstract: Tellurite PCF with flattened and near zero

dispersion was obtained by genetic algorithms simulations

associated with a finite element modal solver. The fiber

obtained may be promising for applications in nonlinear optic

Throughput of CSMA in Hoyt Fading Channels Elvio João Leonardo, Michel Daoud Yacoub



Recife-PE Oct-2010 pp:1-6

Abstract: This paper investigates the throughput performance

of carrier sense multiple access (CSMA) in Hoyt fading

channels. The approach considered includes the signal capture

model with coherent and incoherent addition of interfering

signals. The case of uniform attenuation for all terminals (or

perfect power control) is studied. Analytical and numerical

results are presented.

Keywords: Wireless communication, CSMA, Hoyt

fading.

Traffic Analysis and Network Protection in Photonic Switched Optical Access Networks Indayara Bertoldi Martins, Felipe Rudge Barbosa, Edson

Moschim

In: 14º SBMO – Simpósio Brasileiro de Microondas e

Optoeletrônica e 9º CBMag – Congresso Brasileiro de

Eletromagnetismo

Vitoria - ES - Brasil Sep-2010 pp:183-188

Abstract: Metropolitan Access Optical Networks using

technologies of optical packet/burst switching (OPS/OBS) are

analyzed in performance and sensitivity to link failure. Through

analytical modeling and computer simulations we adopt ring

and mesh (Manhattan Street type) topologies to evaluate the

impact of link failure in each topology. We usethe parameters

average number of hops and packet loss fraction to evaluate

network performance. It is observed that mesh topologies with

triple-connection node configuration (3x3) are the most robust;

consequently in case of link failure the impact of lost data is

minimum as compared

Keywords: Network Protection, Photonic Switching,

Optical Packet and Burst Networks, Optical Fiber

Communications

User Cooperation Using Multiple Antennas Carmen Lúcia Avelar Lessa, Gustavo Fraidenraich

90 Sinopse da FEEC




Abstract: This paper proposes user cooperation strategy using

multiple antennas technology (MIMO). In a first model we used

a Code Division Multiple Access (CDMA) system and in a

second model we apply the techniques of the decorrelator and

Singular Value Decomposition (SVD) to allow cooperation. We

show how cooperation using different numbers of antennas can

be accomplished. It was considered a cooperation scheme for

MIMO MAC channel with two users having single antenna and

the receiver with two antennas. The results show that user

cooperation with multiple antennas reduces the bit error

probability.

Keywords: User cooperation, multiple-input multiple.

Vertical Handoff Algorithms for Heterogeneous 3G Networks Leandro Marques, Shusaburo Motoyama




Abstract: One of main challenges of fourth generation

wireless networks (4G) will be the integration of various

mobile technologies such as CDMA 1xEV-DO RA,

UMTS/HSDPA and WiMAX. In this paper, the interoperability

between the CDMA 1xEV-DO RA and the UMTS/HSDPA in

the 4G context is investigated. New algorithms for vertical

handoff traffic acceptance are proposed considering the link

occupation, the buffer occupation, the radio signal strength

(RSS) or the quantum size (DRR) of each 3G system, taken

individually or in combination of them, as inputs for decision of

vertical handoff process. Different algorithms are evaluated

through QoS metrics such as the average packet delay and the

loss percentage in function of vertical handoff traffic load. The

results showed that depending on the chosen algorithm it is

possible to assure the QoS of 1xEV-DO RA and

UMTS/HSDPA systems and still to accept a good amount of

vertical handoff traffic.

Wavelength conversion characterization of 2-14 Gb/s BPSK channels based on SOA-FWM properties Eduardo Cavalcanti Magalhães, Evandro Conforti, Aldario


In: Congresso Internacional Frontiers in Optics/Laser Science

Conference of Optical Society of America

San Jose-CA - USA-USA Oct-2010 pp:1-6

Abstract: In this work, experimental results of an empirical

characterization of wavelength conversion of 2-14 Gbps phase

modulated signals based on SOA nonlinear effects, specifically

the FWM, were presented. The wavelength converter based on

FWM presented a 6-nm conversion range (3 nm in up and

down-conversions) but was sensitive to light polarization, with

a variation of 8 dB between the worst and best case analyzed.

Keywords: amplificadores ópticos semicondutores,

conversão em comprimento de onda, sistemas multicanal

(WDM)

Zero-Dispersion- Wavelength Displacement of a Photonic Crystal Fiber Roddy Elky Ramos Gonzales, Enver Fernandez Chillcce, L.C.

Barbosa, Hugo Enrique Hernandez Figueroa


Recife PE - Brasil Sep-2010

Abstract: The Zero‐Dispersion‐Wavelength (ZDW) of a

Photonic Crystal Fiber (PCF) may be controlled by changing

the linear refractive index and the thickness of the thin film that

covers the inner surfaces of the holes.

Book


Unsupervised Signal Processing: Channel Equalization and Source Separation Ed.:1 João Marcos Travassos Romano, Romis Ribeiro de Faissol

Attux, Charles Casimiro Cavalcante, Ricardo Suyama

- ISBN: 9780849337512

CRC Press Boca Raton, FL USA v:1 Sep-2010 pages:340

Abstract: This book provides a unified, systematic, and

synthetic presentation of the theory of unsupervised signal

processing. Always maintaining the focus on a signal

processing-oriented approach, this book describes how the

subject has evolved and assumed a wider scope that covers

several topics, from well-established blind equalization and

source separation methods to novel approaches based on

machine learning and bio-inspired algorithms. From the

foundations of statistical and adaptive signal processing, the

authors explore and elaborate on emerging tools, such as

machine learning-based solutions and bio-inspired methods.

With a fresh take on this exciting area of study, this book:

Provides a solid background on the statistical characterization

of signals and systems and on linear filtering theory

Emphasizes the link between supervised and unsupervised

processing from the perspective of linear prediction and

constrained filtering theory Addresses key issues concerning

equilibrium solutions and equivalence relationships in the

context of unsupervised equalization criteria Provides a

systematic presentation of source separation and independent

component analysis Discusses some instigating connections

between the filtering problem and computational intelligence

approaches. Building on more than a decade of the authors’

work at DSPCom laboratory, this book applies a fresh

conceptual treatment and mathematical formalism to important

existing topics. The result is perhaps the first unified

presentation of unsupervised signal processing techniques—one

that addresses areas including digital filters, adaptive methods,

and statistical signal processing. With its remarkable synthesis

of the field, this book provides a new vision to stimulate

progress and contribute to the advent of more useful, efficient,

and friendly intelligent systems.

Book Chapter


22 - An Episodic Memory Implementation for a Virtual Creature Elisa Calhau de Castro, Ricardo Ribeiro Gudwin

In: Studies in Computational Intelligence Ed.:1 -- Janusz

Kacprzyk(Ed.)

Springer-Verlag Berlin Heidelberg Berlin v:314 Sep-

2010 pp:393-406 doi: 10.1007/978-3-642-15223-8_22

Abstract: This work deals with the research on intelligent

virtual creatures and cognitive architectures to control them.

Particularly, we are interested in studying how the use of

episodic memory could be useful to improve a cognitive

architecture in such a task. Episodic memory is a

neurocognitive mechanism for accessing past experiences that

naturally makes part of human process of decision making,

which usually enhances the chances of a successful behavior.

Even though there are already some initiatives in such a path,

we are still very far from this being a well known technology to

be widely embedded in our intelligent agents. In this work we

report on our ongoing efforts to bring up such technology by

building up a cognitive architecture where episodic memory is

a central capability.

http://dx.doi.org/10.1007/978-3-642-15223-8_22


5 - On Building Meaning: A Biologically-Inspired Experiment on Symbol-Based Communication Ângelo Conrado Loula, Ricardo Ribeiro Gudwin, Sidarta

Ribeiro, Álvaro João Magalhães de Queiroz

In: Brain Inspired Cognitive Systems 2008 -- Amir Hussain;

Igor Aleksander; Leslie S. Smith; Allan Kardec Barros; Ron

Chrisley; Vassilis Cutsuridis(Ed.) - ISBN: 978-0-387-79099

Serie: Advances in Experimental Medicine and Biology

Springer New York - USA v:657 Nov-2010 pp:77-93 doi: 10.1007/978-0-387-79100-5_5

Abstract: The use of an appropriate set of empirical and

theorical constraints to guide the construction of synthetic

experiments leads to a better understanding of the natural

phenomena under study, and allows for a greater understanding

of the experimental results. We begin this chapter with a

description of a general approach for conducting experiments

with artificial creatures within a synthetic ethological context.

Next, we describe how this approach was used to build a

computational experiment regarding the emergence of self-

organized symbols. Our experiment simulated a community of

artificial creatures undergoing complex intra and inter-specific

interactions in which meaning evolved over time, from a tabula

rasa repertoire of random alarm-calls to a specific set of optimal

referential alarm-calls. To design different kinds of creatures as

well as innanimate elements of the environment, we applied

theorical constraints from the Peircean philosophy of sign and

empirical constraints from neuroethology. Our results suggest

that the constraints chosen were both necessary and sufficient

to produce symbolic communication.

Keywords: Communication, meaning, semiosis, symbol

process, self organization, emergence, computer

simulation

Mini-courses

Automation

Mini curso do (CBA 2010)- Análise e Controle de Sistemas Lineares Por Meio de Desigualdades Matriciais Pedro L. D. Peres & Ricardo Oliveira

XVIII Congresso Brasileiro de Automática

Bonito(MS) - Brasil Set-2010

Abstract: O objetivo deste mini-curso é apresentar uma

introdução às técnicas de análise e controle de sistemas lineares

sujeitos a incertezas paramétricas usando métodos de

otimização baseados em desigualdades matriciais lineares (em

inglês, Linear Matrix Inequalities - LMIs), ou seja, problemas

convexos de otimização. Na primeira parte do curso são

apresentadas condições de Lyapunov para a estabilidade de

sistemas lineares, extensões para cômputo de normas H2, H∞, e

para a determinação de ganho estabilizante de realimentação de

estados. A segunda parte considera a presença de incertezas

paramétricas nos modelos lineares, provendo condições na

forma de LMIs para análise e controle robustos. É dado um

enfoque prático à apresentação das condições, que são

programadas e testadas em pacotes computacionais, abordando

exemplos de modelos de sistemas dinâmicos.

Keywords: Linear Matrix Inequalities, H2 norm, H∞

norm

Master's dissertations

Automation

ROBUST FILTERING OF LINEAR TIME INVARIANT SYSTEMS BY MEANS OF POLYNOMIAL LYAPUNOV FUNCTIONS Filtragem robusta de sistemas lineares invariantes no tempo por meio de funções de Lyapunov polinomiais Márcio Júnior Lacerda

Supervisor: Pedro Luis Dias Peres (DT/FEEC/UNICAMP)

Defense date: Oct, 27 2010

Abstract: This work presents new convex optimization

procedures for full order robust H2 and H∞ filter design for

continuous and discrete-time uncertain linear systems. The

time-invariant uncertain parameters are supposed to belong to a

polytope with known vertices. Thanks to the use of a larger

number of slack variables, and homogeneous polynomial

relaxations, linear matrix inequalities for the design of robust

filters can be derived from the proposed conditions,

outperforming the existing methods. The superiority and

efficiency of the proposed method for robust filter design are

illustrated by means of numerical comparisons in benchmark

examples from the literature.

Keywords: Uncertain systems, Robust H_2 and Hoo

filtering, Homogeneous polynomial Lyapunov functions,

Linear matrix inequalities.


DETAILED RESIDENCIAL POWER CONSUMPTION SYSTEM WITH ZIGBEE NETWORK SENSOR Sistema de monitoramento detalhado do consumo elétrico residencial utilizando rede de sensores zigbee Jose Douglas Bertazzoni Zambianco

Supervisor: José Antonio Siqueira Dias

(DEMIC/FEEC/UNICAMP)

Defense date: Sep, 30 2010

Abstract: The electrical segment is always looking for better

quality of services offered to customers. There is a demand of

understand the consumption of electrical energy by each

customer, it can bring an individualized profile that can show

important informations related to the energy usage and how

make it better. This works presents a project design, the

development and implementation of a sensors network

monitoring the power consumption of each point of a house,

considering wall sockets, jack, electrical shower and lamps to

take the percentage of each point usage.

Keywords: Electric meters, ZigBee, Sensor Networks

COLLABORATIVE DISTANCE TEACHING OF ELECTRONICS IN SYNCHRONOUS AND ASYNCHRONOUS ENVIRONMENTS USING FREE SOFTWARE Ensino colaborativo de eletrônica em ambiente síncrono e assíncrono usando software livre Luis Rogério Gomes de Almeida

Supervisor: José Antonio Siqueira Dias

(DEMIC/FEEC/UNICAMP)

Defense date: Dec, 15 2010

Abstract: This research was developed an approach of an

electronic remote learning. The approach, predicted that online

collaborative experiments in real time, was tested on a pilot

course: Practical Operational Amplifiers.

The aim of this new approach is to diversify the supply of

vocational training in electronics, through the use of E-learning,

with synchronous and asynchronous activities.

http://dx.doi.org/10.1007/978-0-387-79100-5_5

92 Sinopse da FEEC

Were selected models of learning, instructional project,

production process and evaluation process. The infra-structure

environment focus on open source and freeware tools, to meet

market demand at competitive cost and enable greater

geographical spread as possible.

This work, was introduced, in a pioneer manner, perform

experiments using computer simulations in a collaborative

environment, changing the learning dynamics and creating a

new interactive perspective between teacher and students in an

effective environment for electronic e-learning. It was observed

with this research a feasible way to teach remotely electronic

with practical activities interactive and collaborative.

Keywords: E-Learning, learning environment,

electronics teaching, free software.


IDENTIFICATION OF INCONSISTENCIES AND INDETERMINACIES OF A MEDICAL EQUIPMENT CLASSIFICATION: PARACONSISTENT ANNOTATED LOGIC Identificação de inconsistências e indeterminações na classificação de equipamentos médico-hospitalares: lógica paraconsistente anotada Natália Ferreira Oshiyama

Supervisor: José Wilson Magalhães Bassani

(DEB/FEEC/UNICAMP)


Abstract: Physicians have become dependent on medical

equipment for safer and more efficient treatment of patients.

Therefore, medical technology management has become more

important. This work aimed at developing a methodology for

classification of medical equipment based on the requirement of

corrective maintenance, namely, frequency of failures, as well

as time and cost of this kind of service. Equipment classes were

established using the Always Better Control analysis (ABC).

The paraconsistent annotated logic (PAL) was used to identify

inconsistencies and indeterminacies that might arise from the

equipment classification, pointing out to the clinical

engineering team specific equipments that required a more

detailed, post-hoc, case analysis. As almost 90% of the

classifications did not present inconsistencies and/or

indeterminacies, it is possible to conclude that the classification

was coherent and may be used as a tool for helping clinical

engineers on their daily management work, new equipment

acquisition and replacement planning, data mining for

equipment manufacturers and by regulatory agencies

Keywords: medical equipment classification, ABC

analysis, paraconsistent annotated logic, clinical

engineering.

Terapia elétrica funcional intensiva no membro superior parético de pacientes pós acidente vascular encefálico Fernanda Passos Dos Reis Ervilha

Supervisor: José Wilson Magalhães Bassani

(DEB/FEEC/UNICAMP)

Defense date: Nov, 30 2010

Abstract: Stroke often results with decreased ability to control

shoulder and elbow movements, as well as compromised

grasping. In the last decade, researchers have investigated the

effect of simultaneously applied intensive neuromuscular

electrical stimulation and functional exercises, aiming

rehabilitation of hand movements. Once proved to be effective,

Intensive Functional Electrical Therapy (IFET) tends to be

widely used in rehabilitation centers due to decreased treatment

time needed for each patient. The present study aimed to

compare the effect of functional therapy with functional therapy

plus IFET, in short, medium, and in a long term. Ten

volunteers, with mean (±SD) age and EVA time 63.1 (±11) and

7.9 (±6.8) weeks and months, respectively, were randomly

selected and divided in two groups. . Eight volunteers

concluded the study. Volunteers underwent to 5 weeks of

treatment, composed of 30 minutes of conventional therapy in

addition to 30 minutes of IFET. For the experimental group, a

four channel electrical stimulator Actigrip® CS system was

used. In the first two weeks of treatment using electrical

stimulation, only upper limb proximal muscles were stimulated

(m. deltoid – anterior and lateral fibers), with surface

electrodes, using a 200 ìs, 50 Hz, compensated monophasic

pulse, 20-45 mA of intensity. Motor function was evaluated

using the Upper Extremity Functioning Test -UEFT), Drawing

Test- DT, and neurological evaluation. Analysis of variance

(ANOVA) showed significant difference (F(4, 20)=8, 4; p&lt0,

01) for the parameter number of functional task repetitions. The

Tukey Honest Significant Difference test showed that both,

TEFI and control groups significantly increased the number of

motor task repetitions they could perform in two

minutes(p&lt0, 03). This was significant when pre-treatment

was compared with post-treatment (2 and 5 weeks of treatment,

and 12 and 24 weeks of follow-up). The number of times the

volunteers performed the motor task increased from 8 to

approximately 11. In conclusion, functional training of upper

limb, impaired due to stroke, whether added or not to intensive

electrical stimulation improved motor function. This result was

obtained after two weeks of treatment and last for a period of

24 weeks.

Keywords: stroke, intensive functional electrical

therapy, upper extremity paresis, neuromuscular

electrical stimulation, rehabilitation, functional training,

grasping, physiotherapy.

HYPERMEDIA SYSTEM FOR SUPPORT IN TECHNICAL TEACHING OF MEDICAL EQUIPMENT Sistema hipermídia para apoio ao ensino técnico de equipamentos médico-hospitalares Debora Dias Leister Batista

Supervisor: Sérgio Santos Muhlen (DEB/FEEC/UNICAMP)


Abstract: This study presents the construction and evaluation

of a hypermedia system to facilitate technical teaching of

medical-hospital equipment, in a technician preparation course

supported by an industrial institution, aiming to contribute for

the teach-learning process. In this first version, the hypermedia

system is focused in one equipment (cardiac defibrillator). It

was evaluated by a selected group of students, having passed a

pre-test to determine their previous knowledge on the matter,

then using the system proposed, and a post-test to evaluate the

gain. The results showed the learning level was significantly

greater among students that used the hipermedia system,

confirming its value for the teaching-learning process.

Keywords: technical teaching, teach-learning,

Hypermedia, defibrillator.


A STUDY ABOUT IMPLEMENTATION OF ELLIPTIC CURVE PAIRING BASED CRYPTOSYSTEMS IN 8-BIT SMART CARDS Um estudo sobre a implementação de criptossistemas baseados em emparelhamentos bilineares sobre curvas elípticas em cartões inteligentes de oito bits Matheus Fernandes De Oliveira

Supervisor: Marco Aurélio Amaral Henriques

(DCA/FEEC/UNICAMP)


Abstract: Bilinear pairings over elliptic curves are

mathematical functions that enable the development of a set of


new cryptographic protocols, including the so called identity

based cryptosystems. These cryptosystems represent a new way

to implement public-key cryptography in such a way that the

restrictions related to public keys type, size and format are

reduced or completely removed. This work presents a study

about implementation of pairing based cryptosystems in 8-bit

smart cards. We also present new equations to be used in

Montgomery's Ladder algorithm for scalar multiplication of

supersingular ellipitic curves over binary fields. These

equations make the algorithm faster without compromising its

security characteristics. Finally, we discuss the secure

delegation of pairing computation, that enables a

computationally limited device, like smart cards, to delegate the

paring computation to a powerful device. We propose a

modification in this technique that decreases the number of

operations performed by the smart card.

Keywords: Bilinear pairings, elliptic curves, public-key

cryptography, identity based cryptosystems, pairing

delegation, smart cards.

REAL TIME RAIL FREIGHT CARS ASSIGNMENT ALGORITHM Algoritmo de distribuição e alocação Joelma Cristina Costa

Supervisor: Fernando Antônio Campos Gomide

(DCA/FEEC/UNICAMP)


Abstract: The empty car distribution and allocation process of

railroads is dynamic and involves complex planning

mechanisms. The empty car distribution and assignment

problem requires from the decision maker a fast response. Since

the results should be quickly propagated to the

terminals(yards), in order to perform maneuvers, activities

(attach and detach) before trains arrivals. This paper proposes

an algorithm to solve a decision problem in the real time car

distribution and assignment planning. The algorithm is based in

a networks flow model that considers the train scheduling,

routes and capacity of trains and railroad operations. This work

also includes a fuzzy distribution algorithm to consider

information strategic as customer reliability, time horizon

predictability and uncertainty in the number of cars required by

the demand. The classical models in the literature has not

considered strategic information in the distribution and

assignment planning, but it is always considered when the

distribution planning is made by the distributors. Experimental

results has shown that the proposed algorithms provides

realistic and efficient solutions under quality of solution and

computational performance point of view.

Keywords: empty car distribution, car assignment, real

time planning.

CONTENT MANAGEMENT IN A LANGUAGE TEACHING ENVIRONMENT BASED ON INTELLIGENT TUTORING SYSTEM WITH LEXEME-AGENTS AND IMAGE SEMANTIZATION Gestão de conteúdos em um ambiente de ensino de línguas baseado em sistema tutor inteligente com agentes-lexemas e semantização de imagens Ismael Mattos Andrade Ávila

Supervisor: Ricardo Ribeiro Gudwin

(DCA/FEEC/UNICAMP)


Abstract: This work proposes an architecture based on an

Intelligent Tutoring System (ITS) for language teaching

environments. The main contribution of the proposal is in its

content selection and sequencing mechanism, and is based on

the strategy of treating each lexeme of the target language (L2)

as an autonomous pedagogical unit, instantiated as a software

agent whose goal is to be learned. This strategy creates a

bottom-up apporach that is flexible enough to adapt to changes

in the pedagogical objectives and to reproduce the gradual,

contextualized and somewhat unconscious nature of the first

language (L1) acquisition. The proposed architecture is based

on three main pillars: (i) the lexeme-agents of the target

language (L2) compete for a limited resource, the course

interface; (ii) the images used in the course scenes are

associated to metadata that describe them semantically,

influencing the behavior of the agents and (iii) an ontology of

L2 defines the semantic and syntactic relations of its lexemes

and then underpins the inferences made by the multiagent

system.

Keywords: Computational Semiotics, Artificial

Intelligence, Intelligent Tutoring Systems, Multiagent

Systems, Ontologies, Metadata, Semantic Web.

Arquitetura de anotações digitais para grupos colaborativos Christian Medeiros Adriano

Supervisor: Ivan L.M. Ricarte (DCA/FEEC/UNICAMP)


Abstract: Digital annotation systems are developed from

partial scenarios and arbitrary requirements. Accidental and

essential features end up mixed in non-explicit models. Such

software engineering situation addresses the development of

disposable prototypes. However, it does not support the design

of architectures for digital annotation for non-functional

requirements such as extensibility, robustness and interactivity.

We conducted a careful analysis of the concept of annotation

and described use scenarios already adopted and supported by

some kind of tool. The requirements extraction followed

objective methods capable of critical analysis. From this firm

and logically structured foundation, we designed a conceptual

model to serve as the basis for classifying existing systems. The

model was transformed into a systemic design by a component

architecture that separates the essential and accidental features.

We implemented the architecture as plugins in the Eclipse

environment and demonstrated the effectiveness of the

proposed model .

Keywords:

DATA MINING METHODOLOGY FOR ONLINE LEARNING ENVIROMENTS Metodologia de mineração de dados para ambientes educacionais online Geraldo Ramos Falci Júnior

Supervisor: Ivan Luiz Marques Ricarte

(DCA/FEEC/UNICAMP)


Abstract: Computer-based distance education is becoming

popular as computational resources and Internet expand.

Nevertheless, educators may have difficulties to understand the

necessities of his classes and therefore improve their courses.

Usage analysis of these distance Learning Management

Systems through data mining techniques is a way of obtaining

relevant information that allow the educator to observe some of

the classes’ needs and modify his courses accordingly. The goal

of this work is to elaborate a methodology to allow tackling

problems of this nature in an objective and flexible way, easing

the identification of potential problems in the analysis and

adequate points of feedback to correct and retake the process. A

sequence of steps is elaborated to constitute this methodology

and after that is tested with a group of real data obtained from

the instance of TIDIA-Ae used by UNICAMP as an auxiliary to

classes in campus. The results show the efficiency of the

proposed method, although some problems surfaced on these

results originated from the way the system is employed by

students and teachers.

94 Sinopse da FEEC

Keywords: Data Mining, Learning Management

Systems, Online Educational Environments, TIDIA-Ae,

SAKAI.

STRATEGIC EVALUATION METHODOLOGY OF THE EMBEDDED SOFTWARE ON DIGITAL TELEVISION SET-TOP BOXES Metodologia de avaliação estratégica do software embarcado em receptores de tv digital Nilsa Toyoko Azana

Supervisor: Ivan Luiz Marques Ricarte

(DCA/FEEC/UNICAMP)


Abstract: Strategic evaluation methodologies have been used

in a large field of human knowledge, specially in areas such as

engineering and technology, as a tool for identifying and

understanding issues related to science, technology and

innovation. The success of an innovative product or service is

closely related to different factors like technological

competition and evolution, strategies of the actors, economical

constraints, legal framework, social necessities, etc.

This work develops a methodology that was applied on a

strategic evaluation to identify the main features of the

embedded software on digital television set-top box, by means

of the exploration of feasible paths to the interactive television

in Brazil. This evaluation shows that the user expectation

related to digital television is to play a much more active role,

not only accessing and consuming different information

through Internet access, but also being able to choose the time

to enjoy the content through TV program recording.

Keywords: strategic evaluation, foresight, scenarios,

embedded software, digital television, middleware.

Electrical Energy

MONITORING IN REAL TIME FOR OPTIMIZATION OF THE TRANSMISSION LINE Otimização do uso da linha de transmissão através do monitoramento em tempo real Renato Maioli Castilho

Supervisor: Gilmar Barreto (DMSCI/FEEC/UNICAMP)


Abstract: This paper presents an analysis method for loading

of overhead transmission line in real time which relates to

loading of the transmission line with external factors that

directly or indirectly exert influence on the operating limits of

the line.

Through the implementation of a monitoring system in a line of

230 kV Eletronorte, weather information and the very line were

collected and transmitted via cable OPGW to a control center

where, from a software, we obtained the line ampacity real-time

using the database generated with information collected by the

monitoring system and using techniques of artificial neural

networks, a module was developed to predict the surface

temperature of the cable, allowing the estimation of ampacity of

the line in the short term.

The approach given to data obtained by the monitoring system

proposed has generated interesting results when it comes to

finding the best use of the line and proved a very useful system

for the operation in order to load.

Keywords: loading of transmission line, ampacity,

predict loading, thermal loading.

DEVELOPMENT OF METHODOLOGIES FOR ANALYSIS OF POSITIVE FEEDBACK ANTI-ISLANDING PROTECTION OF INVERTER-BASED GENERATORS Análise do impacto da proteção antiilhamento na estabilidade de geradores conectados via inversores Tiago Rodarte Ricciardi

Supervisor: Walmir de Freitas Filho

(DSCE/FEEC/UNICAMP)


Abstract: The usage of inverter-based generators connected

directly to electric power distribution grids has considerably

increased in recent years due to technological advances in fuel

and photovoltaic cells. The anti-islanding protection at the

interconnection point is among the main technical requirements

to utilitity integration of this kind of distributed generation. A

solution commonly employed in the compliance of such

requirements is the anti-islanding control based on positive

feedback of deviations of generator’s terminal electrical signals

from its nominal values, which are continually seeking to

destabilize the inverter operation to quickly disconect it under

islanding condition. Since the positive feedback scheme is a

destabilizing force, the impact of this scheme on the stability of

a grid-connected DG system and on other DGs becomes a

natural concern when a large number of inverter-based DG is

connected to a weak supply system. This thesis investigates the

impact of such anti-islanding control over stability of

distribution networks by using modal analysis of a series of

small-signal models of distribution systems with inverter-based

generators.

Keywords: electric power distribution systems,

distributed generation, antiislanding protection, electric

power systems dynamic modeling, electric power systems

stability.

BLIND SOURCE SEPARATION IN POLARIZATION MULTIPLEXED OPTICAL SYSTEMS Separação cega de sinais em sistemas ópticos com multiplexação de polarização Eduardo De Souza Rosa

Supervisor: João Marcos Travassos Romano

(DMO/FEEC/UNICAMP)


Abstract: Polarization multiplexing is a promising technique,

able to double the capacity of next generation optical

communication systems working at 40 Gb/s. Such systems are

dependent of digital signal processing, both to separate the

signals in multiplexed polarization, and to combat impairments

imposed by optical channel. In general, unsupervised

techniques such as multiuser CMA are used to perform the

separation and equalization simultaneously. However, this

method has some drawbacks, in particular the possibility of

losing one of the signals when the system has polarization

dependent loss. This work proposes a new structure for

demultiplexing employing a separation technique known as

independent component analysis in conjunction with an

equalizer adapted by the constant modulus algorithm. The

proposed technique is evaluated through simulations,

confirming the good performance in front of the main linear

distortions present in optical communication systems and being

more robust in terms of polarization dependent loss.

Keywords: signal processing, optical communication

systems, polarization multiplexing, blind source

separation, independent component analysis


OPTIMAL CONTRACTS ALLOCATION FOR ELECTRIC ENERGY TRADING Contratação ótima para comercialização de energia elétrica Marcelo Richter Fernandez

Supervisor: Prof. Dr. Christiano Lyra Filho

(FEEC/UNICAMP)


Abstract: This work proposes the development of a new

approach for the operation of electric energy contracts in the

Brazilian free market. It uses concepts of linear optimization,

financial mathematics, statistics and considers the Brazilian free

market regulation.

The methodology allows traders to maximize their profits by

using the optimal allocation for each energy contract. It also

allows traders to simulate trading with different scenarios of

energy consumption by the customers, spot market prices,

future market prices and long term contracts. Results allow

investors to compare energy trading options with other

alternatives for investments.

Case studies illustrate the application of the proposed

methodology to real world scenarios; benefits are also

evaluated.

Keywords: portfolio, free market, energy trading,

trader, electric energy, free customer, spot prices,

contabilization, optimization, simple


ELETROMAGNETIC SIMULATOR IN A GRID COMPUTING ENVIRONMENT Simulador eletromagnético em um ambiente de grades computacionais Igor José Ferreira De Freitas

Supervisor: Hugo Enrique Hernandez Figueroa

(DMO/FEEC/UNICAMP)


Abstract: The aim of this work is to develop the Pre and Post-

Processing stages from an electromagnetic simulation suite,

called SSAR-BR, and also a parallel computational

environment which permits the execution of large

electromagnetic problems.

The processing stage, based in the Finite Difference Time

Domain (FDTD) method, has been already developed as part of

a doctorate thesis made by a researcher from this department.

The Pre-processing stage involves a fundamental modeling tool

capable to model telecommunications devices (radiant sources,

mobile terminals and anthems) and biological models (human

body parts and guinea-pig). On the other hand, the Post-

Processing stage permits visualizing the electromagnetic

simulations results in a two and three dimensions way. Both

stages were developed in Java and OpenGL languages.

The parallel computational environment is based on Grid

Computing paradigm which consists in software and hardware

infra-structure that integrates dispersed computational resources

interconnected across a network. Its purpose is to share such

resources under an access control policy and establishing a

scalable, low-cost and high performance computational

environment. The middleware is the layer between the user and

operation systems responsible to manage the Grid resources

and, for this work, the UNICORE 6 was adopted. The mainly

reasons were its safe and transparent access to the distributed

environment and, most important, it follows the open patterns

from OGF (Open Grid Forum) community.

Keywords: Grid Computing, electromagnetism,

computers simulation, geometry modeling , graphics

visualization

DEVELOPMENT OF A LOW-LOSS RF FEED SYSTEM BASED ON SUSPENDED STRIPLINE. Projeto de uma rede de alimentação de baixas perdas para um arranjo de antenas utilizando linhas de fita Daniel Nascimento Duplat

Supervisor: Hugo Enrique Hernandez Figueroa

(DMO/FEEC/UNICAMP)


Abstract: It presents the development of a feed system using

stripline in the range of RF. The power supply is used in an

antenna composed of a linear array of n identical elements

equally spaced. The work is divided into two parts: the first

shows the definition of the arrangement’s characteristics, the

definition of the desired radiation pattern and the methodology

used to generate this pattern, as well as defining the values of

amplitude and phase required for each element, the second part

deals with the development of the stripline network needed to

obtain the distribution of the total power required for each

element of the arrangement. This part also presents the

characteristics of the electromagnetic technology used, their

difficulties and solutions found to achieve the desired operation

of the feed system.

Keywords: antenna array feed system, suspended

stripline, amplitude distribution, Hamming, radiation

pattern synthesis

MEL GENERALIZED CEPSTRAL MODEL FOR SPEECH SPECTRAL ENVELOPE Modelo Mel-Cepstral generalizado para envoltória espectral de fala Ramiro Roque Antunes Barreira

Supervisor: Fábio Violaro (DECOM/FEEC/UNICAMP)


Abstract: Mel-Generalized Cepstral analysis (MGC) is an

approach for speech spectral envelope estimation that unifies

LPC, Mel-LPC, Cepstral and Mel-Cepstral Analysis. The

functional form of the MGC model varies continuously with the

real parameters γ e α, enabling the model to acquire different

characteristics. The flexibility of MGC model associated with

its stability and good performance under parameter

manipulation have made MGC parameters to be successfully

employed in speech codification and HMM (Hidden Markov

Models) speech synthesis. The present study focuses on

mathematical aspects of MGC analysis, treating and proving, in

a fairly extended way, analytical and computational formulation

for model solution. MGC analysis properties and basic

formulation are treated in mel-generalized logarithmic spectrum

perspective. A method for the computation of MGC and Mel-

Cepstral coefficients that do not require frequency

transformation recursion formulas is proposed. Experiments

and analysis concerning the method are in their initial stage and

needs to be completed in the sense to identify computational ×

representation performances.

Keywords: Mel-Generalized Cepstral Analysis, Speech

Spectral Envelope, Speech Analysis and Synthesis,

Statistical Parametric Speech Synthesis, HMM.

QUATERNARY LDPC CODES APPLIED TO OFDM TRANSMISSION TECHNIQUE Códigos LDPC quaternários aplicados à técnica de transmissão OFDM Maria Leopoldina Martins Neves Seixas Gonçalves

Supervisor: Renato Baldini Filho

(DECOM/FEEC/UNICAMP)


Abstract: The LDPC (Low Density Parity Check) codes

constitute a efficient family of codes generated by sparse parity

check matrices and it is considered as one of the classes of

codes that presents the best performance in digital

96 Sinopse da FEEC

communications systems. LDPC codes over the ring of integers

modulo-4 (Z4) are the main focus of this work. The standard

proposed by SBTVD (Brazilian Digital Television System) is

used as reference for performance comparisons. It is proposed

the substitution of the inner code in the channel encoding at the

transmitter, for a LDPC code. The transmission channel is

influenced by the AWGN (Additive White Gaussian Noise) and

affected by flat and frequency-selective fading. To minimize

those interferences it is proposed the associated use of the

OFDM (Orthogonal Frequency Division Multiplexing)

technique. The decoding process is based on a generalization of

the SISO (Soft Input Soft Output) algorithm proposed by P.

Farrell and J. Moreira. A comparative analysis of the LDPC

codes is made based on BER performance and on

computational complexity. Finally, the simulation results for

different codes lengths are presented, highlighted the

significantive improvement in performance for LDPC codes.

Keywords: LDPC Codes, Digital TV, AWGN, Flat and

Frequency-Selective Fading, OFDM, SISO Algorithm.

QUALITY EVALUATION OF ENCRYPTED VOIP CALLS USING MEAN OPINION SCORE AND TRAFFIC CONTROL Avaliação da qualidade de chamadas VoIP cifradas usando Mean Opinion Score e Traffic Control Dherik Barison

Supervisor: Leonardo de Souza Mendes



Abstract: The purpose of this work is to evaluate the quality

of encrypted VoIP calls with different cipher algorithms

through OpenVPN software. This evaluation will do by the

MOS (Mean Opinion Score), a method to indicate user

satisfaction of the quality of communication. The encrypted

VoIP calls will occur in different network scenarios that present

different problems, like packet loss, out-of-order packets, delay,

network bandwidths, etc. These scenarios were based on some

real situations of use and will be emulated with the Traffic

Control tool from Linux, able of handling the packages sent by

any available network interface. The scenarios will also have

different network bandwidths to assess its importance in some

situations.

Keywords: VoIP, VPN, MOS, Traffic Control.

Doctoral thesis

Automation

SPAM: FROM THE RISE TO THE EXTINCTION Spam: do surgimento à extinção Tiago Agostinho De Almeida

Supervisor: Akebo Yamakami (DT/FEEC/UNICAMP)


Abstract: Spam has become an increasingly important

problem with a big economic impact in society. Spam filtering

poses a special problem in text categorization, in which the

defining characteristic is that filters face an active adversary,

which constantly attempts to evade filtering. In this thesis, we

present a comprehensive study of the spamming problem.

Among many offered contributions we present: the statistical

and historical survey of spamming and its consequences, a

study regarding the legality of spams and the main juridic

methods adopted by some countries, the study and proposal of

new performance measures used for the evaluation of the spam

classifiers, the proposals for improving the accuracy of Naive

Bayes filters by using dimensionality reduction techniques and

a novel approach to spam filtering based on the minimum

description length principle and confidence factors.

Furthermore, we have conducted an empirical experiments

which indicate that the proposed classifier outperforms the

state-of-the-art spam filters.

Keywords: spam filtering, classification, text

categorization, junk mails, information retrieval,

machine learning, minimum description length.

INTERIOR POINT METHODS APPLIED TO PREDISPATCH WITH SIMULTANEOUS BAR AND LINES MANEUVERS Métodos do pontos interiores aplicados ao pré-despacho com manobras simultâneas de barras e linhas Silvia Maria Simões de Carvalho

Supervisor: Christiano Lyra Filho

(DENSIS/FEEC/UNICAMP)


Abstract: In this work the primal-dual interior point method is

used to minimize the DC predispatch generation costs and

transmission losses on hydroelectric power system with

previously scheduled maneuvering. A matrix structure study is

performed, to consider the changes that occur in the system

along the planning period. Some linea systems solved at each

iteration depend only of network physical data and topology

Such matrices can be decomposed before starting the iterative

process speeding up the implementation. Numerical

experiments with IEEE and real Brazilian power systems show

that the proposed approach is fast and robust obtaining

convergence in

all test performed.

Keywords: Interior Point Methods, Schedulled

Maneuver, Predispatch Problem, Power Systems.


FREQUENCY-DEPENDENT CHANGES IN FRACTIONAL SARCOPLASMIC RETICULUM CA2+ RELEASE IN RAT CARDIAC MYOCYTES Liberação fracional de ca2+ do retículo sarcoplasmático em miócitos cardíacos de ratos estimulados em diferentes freqüências Rafael de Almeida Ricardo

Supervisor: Jose Wilson Magalhães Bassani

(DEB/FEEC/UNICAMP)


Abstract: The force-frequency relationship is an intrinsic

characteristic of cardiac muscle and its mechanisms still remain

to be completely understood. The main goal of this work was to

determine the relationship between the fractional Ca2+ release

(FR) and stimulatory frequency in isolated rat ventricular

myocytes. Action potentials, L-type Ca2+ current (ICaL) and

intracellular Ca2+ transient (D[Ca2+]i) were recorded using the

whole-cell patch-clamp technique at different rates. FR at a

twitch was assumed to be the ratio of the systolic variation in

total [Ca2+] minus ICaL integral, and the SR content

([Ca2+]SR). APD90 increased from 76 ± 9 ms at 0.2 Hz to 130

± 11 ms at 2 Hz. At 0.2 Hz, ICaL peak was -4.5 ± 0.7 pA/pF,

and it decreased to -2.7 ± 0.4 pA/pF with increasing frequency

to 2 Hz. D[Ca2+]i decreased from 603 ± 56 nM to 408 ± 32

nM, at 0.2 and 2 Hz, respectively. FR also decreased with

frequency, from 0.81 ± 0.02 at 0.2 Hz to 0.54 ± 0.02 at 2 Hz,

whereas [Ca2+]SR did not change significantly. The negative

relationship between Ca2+ transient and stimulation rate is

likely to be due to the decreased Ca2+ release. Lower FR at

higher rates might be due to decrease in ICaL peak, which is

the main trigger of sarcoplasmatic reticulum Ca2+ release.

Keywords: ventricular myocyte, force-frequency

relationship, Ca2+ transport, patch-clamp.


COMPACT FORWARDING: A PROBABILISTIC APPROACH TO Compact forwarding: uma abordagem probabilística para o encaminhamento de pacotes em redes orientadas a conteúdo Christian Rodolfo Esteve Rothenberg

Supervisor: Maurício Ferreira Magalhães

(DCA/FEEC/UNICAMP)


Abstract: This thesis introduces the concept of compact

forwarding in the field of content-oriented networks. The main

idea behind this concept is taking a probabilistic approach to

the problem of packet forwarding in networks centered on

content identifiers rather than traditional host addresses. The

fundamental question explored is where to place the packet

forwarding state, in network nodes or in packet headers?

Solutions for both extremes are proposed. In the SPSwitch,

approximate forwarding state is kept in network nodes. In

LIPSIN, the state is carried in the packets themselves. Both

approaches are based on probabilistic packet forwarding

functions inspired by the Bloom filter data structure. The

approximate forwarding state comes at the cost of additional

considerations due to the effects of one-sided error-prone data

structures. The thesis contributes with a series of techniques to

mitigate the false positive errors. The proposed compact

forwarding methods are experimentally validated in several

practical networking scenarios.

Keywords: Packet forwarding, algorithms, data

structures, Bloom filter


BICLUSTERING IN THE ANALYSIS OF UNCERTAIN DATA Biclusterização na análise de dados incertos Fabrício Olivetti De França

Supervisor: Fernando José Von Zuben

(DCA/FEEC/UNICAMP)


Abstract: The data acquisition process is subject to many

inconsistencies and uncertainties. These uncertainties may

produce noisy data or even provoke the absence of some of

them, thus leading to the missing data problem. Most

procedures used to deal with such problem act in a global

manner, relatively to the dataset, and ignore the noise effect on

such analysis. The objective of this thesis is to explore the

properties of the so called biclustering method, which performs

a local data analysis, creating several imputation models for the

dataset in order to minimize the prediction error when

estimating missing values of the dataset. First, it is proposed a

new biclustering algorithm with a better performance than the

one produced by other traditional approaches, with emphasis on

the noise reduction capability of the models generated by the

biclusters. Next, it is proposed the formulation of a quadratic

optimization problem to impute the missing data by means of

the local models engendered by a set of biclusters. The obtained

results show that the use of biclustering helps to reduce the

prediction error of data imputation, besides providing some

interesting conditions for an a posteriori analysis of the dataset.

Keywords: biclustering, data imputation, machine

learning, missing data, noisy data

Electrical Energy

THREE-PHASE ELECTRONIC POWER CONVERTER FOR Conversor eletrônico de potência trifásico para sistema fotovoltaico conectado à rede elétrica Marcelo Gradella Villalva

Supervisor: Ernesto Ruppert Filho

(DCSE/FEEC/UNICAMP)


Abstract: This work is a contribution to the study of power

converters for photovoltaic distributed generation systems. The

main objective is to present the development and the

construction of a three-phase power converter for a grid-

connected photovoltaic plant. The work presents experimental

results and theoretical studies on the modeling and simulation

of photovoltaic devices, regulation of the photovoltaic voltage,

maximum power point tracking, and modeling and control of a

two-stage grid-connected power converter.

Keywords: Converter, solar, photovoltaic, distributed,

generation, inverter.

STUDY AND IMPLEMENTATION OF A CURRENT CONTROL FOR MATRIX CONVERTERS AND VOLTAGE SOURCE INVERTERS WITHOUT DC LINK CAPACITOR Estudo e implementação de um controle de corrente para conversores em matriz e inversores fonte de tensão sem capacitor no elo de corrente contínua Milton Evangelista de Oliveira Filho


(DSCE/FEEC/UNICAMP)


Abstract: This thesis concern a current control method for

three-phase matrix converter and three-phase voltage source

inverter without a dc link capacitor in order to mitigate and

compensate the distortions present in the output voltages so that

the output currents are sinosoidal. In these converters, because

of lack of large storage elements, imbalances and/or distortions

present in the input voltage will be immediately reflected to the

converter output voltages. The proposed current control model

forces the magnitude of the output space vector current to be

constant through a PI controller that dynamically alters the duty

cycle of the power converter switching for compensating the

imbalances and distortions from input voltages. The

performance of this current control is validated by simulations

implemented in Matlab and experimental results on the

prototype of a voltage source inverter without a DC link

capacitor feeding a three-phase RL load.

Keywords:

WOUND ROTOR THREE-PHASE INDUCTION GENERATOR ACTIVE AND REACTIVE POWER CONTROL APPLIED TO WIND GENERATION BASED ON THE GENERATOR DYNAMIC MATHEMATICAL MODEL Controle de potências ativa e reativa de geradores de indução trifásicos de rotor bobinado para aplicação em geração eólica com a utilização de controladores baseados no modelo matemático dinâmico do gerador Alfeu Joãozinho Sguarezi Filho


(DSCE/FEEC/UNICAMP)


Abstract: Wind energy is an alternative to the growing

demand for electricity and concerns about emission reductions

of pollutants worldwide. In this context, the objective of this

thesis is to propose the use of three types of real and reactive

power controllers of the wound rotor three phase induction

generator to be used in wind farms. The proposed controllers

are the deadbeat controller, the controller by decoupling stator

winding magnetic flux associated with the deadbeat controller

and finally, the predictive control, all based on the generator

dynamic mathematical model. The generator has its stator

windings directly connected to the grid as its rotor windings

connected to the network through a bi-directional converter that

allows the power flow in the two directions. It also evaluates

98 Sinopse da FEEC

the performance of the mentioned power controllers when there

are errors in the estimated generator´s parameters. Results of

computer simulations of the system dynamic mathematical

model and experimental results obtained on a laboratory

assembly are presented to check the proposals.

Keywords: doubly-fed induction generator, wound rotor

induction generator, dfig, vector control, control by

stator flux orientation, deadbeat controller, controller of

disturbance decoupling and deadbeat, model-based

predictive control.


ANOMALY DETECTION IN COMPUTER NETWORKS Detecção de anomalias em redes de computadores Bruno Bogaz Zarpelão

Supervisor: Leonardo de Souza Mendes



Abstract: Anomalies are unexpected and significative

deviations that occur in network traffic due to different

situations such as software bugs, unfair resource usage, failures,

misconfiguration and attacks. At the present time, networks are

very important to academic, governmental and enterprise

environments. Thus, detecting and handling anomalies

efficiently became an essential task. In this work, it is proposed

an anomaly detection system based on three levels of analysis.

This anomaly detection system identifies anomaly occurrences

and offers to the network administrator a wide-network view of

the problem, supporting its solution. Moreover, this system was

developed in GBA tool context. Tests were performed in the

State University of Londrina network, exploring real situations.

Results showed that the proposal has a great detection potential,

is able to adapt to different management policies and decreases

the possibility of network administrators' overload.

Keywords: Network management, Anomalies, Alarms,

SNMP, Baseline.

ITERATIVE RECEIVERS FOR A T-USER N-FREQUENCY MULTIPLE ACCESS CHANNEL WITH NOISE Receptores iterativos para canais de acesso múltiplo ruidosos com n frequencias e t usuários Manish Sharma

Supervisor: Jaime Portugheis (DECOM/FEEC/UNICAMP)


Abstract: The purpose of this work is to analyse the

performance of iterative joint reception and detection for

multiuser channels. The analysis was centered around an N-

frequency noisy channel shared by T users. Channel capacity

values were obtained for joint and single user detection.

Altough the system’s spectral efficiency is low, the

combination of low spectral efficiency and high bandwith

allows for transmission of information with high rates and low

signal to noise ratio. The receiver was modeled as a factor

graph and analysed by its EXIT charts, which were also used to

analyse the users’ error correcting codes. Some systems are

proposed and simulated to obtain the bit error probability.

Results indicate that it is possible to transmit information with

rates close to channel capacity. Both the receiver and the

analysis performed can be applied to other types of multiple

access channels, in particular for systems with N ortoghonal

transmission symbols.

Keywords: joint detection, channel capacity, Multiuser

systems, iterative algorithms, factor graphs

SCHEDULING AND HANDOFF ALGORITHMS FOR 3G AND 4G NETWORKS Algoritmos de escalonamento e de handoff para redes 3g e 4g Leandro Bento Sena Marques

Supervisor: Shusaburo Motoyama (DT/FEEC/UNICAMP)


Abstract: This work presents a performance study of the

forward links of CDMA 1xEV-DO RA, UMTS/HSDPA and

WiMAX systems with emphasis on data schedulers and new

criteria for horizontal and vertical handoff traffic acceptance in

the 3G and 4G networks. These new criteria for horizontal and

vertical handoff traffic acceptance take into account the link

occupation, the buffer occupation, the received signal strength

(RSS) and the size of quantum (DRR) as inputs for decision of

handoff process. Moreover, the study considers the data

schedulers Max C/I (Maximum Carrier Interference), DRR

(Deficit Round Robin), PF (Proportional Fair), priority and the

new proposal Pr/PF (Priority Proportional Fair). The criteria

combined with the data schedulers are evaluated using QoS

metrics in function of internal HTTP traffic or handoff traffic.

The results showed that depending on the chosen criterion and

scheduler, it is possible to assure the QoS of mobile systems

and still accept a good amount of handoff traffic. The study is

based on computer simulations through Matlab software tool.

Keywords: horizontal handoff, WiMAX, UMTS/HSDPA,

CDMA 1xEV-DO RA, vertical handoff, HTTP traffic,

Pr/PF scheduler.

99

Acknowledgement

Authors With great enthusiasm we express our gratitude to all authors and research partners that made this summary of

FEEC’s productivity such a remarkable record. The names of the authors of our works in 2010 are listed below. They

are faculty members, researchers and students of FEEC and colleagues from partner institutions. We had made a

special effort to include all the contributor names, in their original format. We apologize for possible oversights and

errors in the list.

A Abílio Rafael Martins Soares

Adalberto Nobiato Crespo

Adilson Chinatto Jr

Adolfo Fernandes Herbster

Adriane Bellé

Adriano Luís Toazza

Adriano Mesquita Alencar

Afonso J. Prado

Ahda P. G. Pavani

Akebo Yamakami

Aldario Chrestani Bordonalli

Alessandra Benevides Camara

Alessandro de Lima Bicho

Alessandro do Nascimento Vargas

Alex da Rosa

Alexandre Campos Moraes

Alexandre Xavier Falcão

Alexandre de Aguiar Amaral

Alfeu Joãozinho Sguarezi Filho

Alfredo Carlos Peterlevitz

Alfredo R. de Freitas

Alice Maria Bastos Hubinger

Tokarnia

Alim Pedro de Castro Gonçalves

Alireza Mohebi Ashtiani

Alisson Gusatti Azzolini

Aléx Garcia Gonçalves

Álvaro João Magalhães de Queiroz

Amauri Amorin Assef

Amauri Lopes

Ana Amélia Rodrigues

Ana Beatriz Alvarez Mamani

Ana Claudia Vasconcelos Soares

Bulcão

Ana Luiza Metidieri Cruz Malthez

Ana María Ramírez Buitrago

Andrea F. da Cruz

András Zahemszky

André Costa

André Emilio Toscano

André Filgueiras de Araujo

André Kazuo Takahata

André Körbes

André Luiz Morelato Franca

André Luiz Rayol Cavalcante

André Luís Shiguemoto

André Paim Lemos

André R. Fioravanti

André Ricardo Abed Grégio

André Ricardo Gonçalves

André Schonardie Pasqual

André Tavares da Silva

Andréa Santos Leite da Rocha

Angelo Conrado Loula

Angelo Moretti

Angélica Denardi de Barros

Anibal Tavares de Azevedo

Aniruddha M. Gole

Annalisa Zappavigna

Annikki Welin

Antonio Aparecido de Andrade

Antonio Augusto de Godoy Von

Zuben

Anésio dos Santos Jr.

Argollo Junior

Ariovaldo Verandio Garcia

Arismar Cerqueira Sodre Junior

Arnaldo Fim Neto

Aurelio Ribeiro Leite de Oliveira

B Beatriz de Lima Tavares

Bertrand Cottenceau

Bruce Pike

Bruno Bogaz Zarpelão

Bruno Teixeira de Abreu

C Camila Socolowski de Almeida

Carla Verissimo

Carlile Campos Lavor

Carlos Alberto Baldan

Carlos Alberto Bráz Macapuna

Carlos Alberto Favarin Murari

Carlos Alberto Murari Pinheiro

Carlos Alberto de Castro Jr.

Carlos Alberto dos Reis Filho

Carlos Arturo Levi D’Ancona

Carlos Daniel Altamirano Carrillo

Carlos Eduardo Capovilla

Carlos Eduardo Pinto Pereira

Carlos Henrique da Silva Santos

Carlos Henrique de Brito Cruz

Carlos Manuel Portela

Carlos Medeiros Portela

Carlos Pinheiro

Carlos Y. Shigue

Carmen Lúcia Avelar Lessa

Carmen Silvia Bertuzzo

Carolina M. Affonso

Cecília F. Morais

Celso Aleixo de Barros

Celso Iwata Frison

Celso Pascoli Bottura

Celso de Almeida

Celso de Sousa Júnior

Cesareo de La Rosa Siqueira

Chaouki T. Abdallah

Charbel Niño El-Hani

Charles Casimiro Cavalcante

Christian Jutten

Christian Rodolfo Esteve

Rothenberg

Christiano Lyra Filho

Christophe Prieur

Clarice Dias de Albuquerque

Clarissa Fernanda Correia Lima

Loureiro

Claudio Jung

Cleuson de Menezes Atayde

Clésio Luis Tozzi

Cosme Eustaquio Rubio Mercedes

Cresencio Silvio Segura Salas

Cristiano Marcos Agulhari

Cristiano Monteiro de Barros

Cordeiro

Cristiano de Mello Gallep

Cristina A. Maia

Cynthia Cristina Martins Junqueira

Cátia Regina de Oliveira Quilles

Cédric Cassagnettes

César Daltoé Berci

D D.C. Boer

Dalton Soares Arantes

Daniel Benevides da Costa

Daniel Felix de Brito

Daniel Figueiredo

Daniel Furtado Leite

Daniel Grandin Lona

Daniel Guerreiro e Silva

Daniel Moutinho Pataca

Daniel Pedro Bezerra Chaves

Danielle Ferreira Feliciano

Danilo B. do Valle

Danilo I. Brandão

Dario Simões Fernandes Filho

Darko Kirovski

Davi Franco Rêgo

David Jacques Cohen

Debora Dias Leister Batista

Denis Barbier

Diana Pamela Moya Osorio

Diego Souza Bezerra

Diogo Coutinho Soriano

Diogo Gará Caetano

Diogo Salles

Douglas Airoldi

Douglas José Alem

E Eddy Krueger-Beck

Edgar Eduardo Benitez Olivo

Edmundo da Silva Braga

Edna Marina Souza

Edson Adriano Vendrusculo

Edson Bim

Edson Donizete de Carvalho

Edson Felipe Ribeiro da Fonseca

Edson Fonseca

Edson José Nagle

Edson José de Carvalho

Edson Moschim

Eduardo B. Neves

Eduardo Brandani da Silva

Eduardo C. M. Costa

Eduardo Cavalcanti Magalhães

100 Sinopse da FEEC

Eduardo Jorge Valadares Oliveira

Eduardo Luís Carrara

Eduardo Mendonça Scheeren

Eduardo Rocha de Souza

Eduardo Rosa

Eduardo Stockler Tognetti

Eduardo Tavares Costa

Eduardo V. Liberado

Eduardo Zanoni Marques

Edwar Velarde Allazo

Elaine Belassiano

Eleri Cardozo

Eliane Gomes Guimarães

Eline A. C. Barbosa

Elisa Calhau de Castro

Elisangela Ferretti Manffra

Elma Pereira Santos

Elnatan Chagas Ferreira

Elton Mário de Lima

Elvio João Leonardo

Enver Fernández Chillcce

Erasmo Recami

Éricles Rodrigues Sousa

Erinaldo Farias Dos Santos

Ernesto Kenji Luna

Ernesto Ruppert Filho

Estevan Lopes

Ettore Baldini Neto

Eugênio Spanio Rosa

Evandro Conforti

Everton Luiz de Almeida Gago

Junior

Everton Zaccaria Nadalin

F Fabbryccio Akkazzha Chaves M.

Cardoso

Fabiano Fragoso Costa

Fabiano Fruett

Fabio Luciano Verdi

Fabio Morelato França

Fabrizio Cesare Filippo Di Pasquale

Fabrício Olivetti de França

Felipe Rudge Barbosa

Fellipe Saldanha Garcia

Ferando Cardoso Fajoni

Fernanda Caseño Lima Trindade


Fernando D. Penha

Fernando José Von Zuben

Fernando Oscar Runstein

Fernando P. Marafão

Fernando Paolieri Neto

Fernando Pinho

Filipe Dias Baumgratz

Filipe Ieda Fazanaro

Flavio Henrique Teles Vieira

Flávio Olmos Simões

Francisco José Arnold

Francisco Ubaldo Vieira Júnior

Franklin César Flores

Frederico Milano

Fábio Luiz Usberti

G G. Stefanini

Gabriel Rocon Bianchi

Gabriela Castellano

Gean Francesco Chu

Gerardo Miguel Agurto Lescano

Germain Garcia

Gerson Florence Carvalheira de

Azevedo

Gilliard Nardel Malheiros Silveira

Gilmar Barreto

Gilmário Barbosa dos Santos

Gina Andrea Quelal Quelal

Giselle Ferrari

Gislaine A. Asti

Giuliano Gadioli La Guardia

Glades Serra

Glauco Niro

Grace Silva Deaecto

Graziano Chesi

Guilherme Nunes Nogueira Neto

Guilherme Palermo Coelho

Guilherme Silveira Rabelo

Guilherme de Oliveira Coraucci

Gustavo A. Elias

Gustavo Fraidenraich

Gustavo H.C. Oliveira

H H. Kishan

H.D. Mathur

Helder José Ceragioli

Helmo K. M. Paredes

Heloisa H. Müller

Heloisa Pimentel

Henrique Mineo Ashihara

Henrique Sarmento Malvar

Henrique Takachi Moriya

Henrique da Mota Silveira

Hugo Enrique Hernández-Figueroa

Hugo Luis Fragnito

Hugo Murici Ayres

Hugo Ricardo Jimenez Grados

Humberto César Brandão de

Oliveira

Humberto Pinheiro

Humberto Xavier de Araujo

I Iara da Cunha Ribeiro da Silva

Igor Kopcak

Iguatemi E. Fonseca

Indayara Bertoldi Martins

Ioannis M. Besieris

Ioshiaki Doi

Isaías Lima

Ivanil Sebastião Bonatti

J Jacobus Willibrordus Swart

Jaime Portugheis

Jakson Paulo Bonaldo

Jamal Daafouz

Jan de Caigny

Janio Coutinho Canuto

Jeferson Wiliam de Godoy Stenico

Jennifer Campbell

Jeremias Barbosa Machado

Joaquim Miguel Maia

Joel José Puga Coelho Rodrigues

Joelma Cristina Costa

Johannes Dantas de Medeiros Júnior

Jonas Lemos Talaisys

Jonas Rafael Gazoli

Jorge Diego Marconi

José A. Prado

José Alexandre Diniz

José Amilton Mores Junior

José Antenor Pomilio

José Antonio Siqueira Dias

José C. C. Campos

José Claudio Geromel

José Douglas Bertazzoni Zambianco

José E. Bertuzzo

José Erick de Souza Lima

José Federico Vizcaino González

José Leite da Silva Junior

José Luis Azcue Puma

José Luis Verdegay

José Mario de Martino

José Matias Lemes Filho

José Patrocínio da Silva

José Pissolato Filho

José Raimundo de Oliveira

José Ricardo Mendes

José Wilson Magalhaes Bassani

Jozué Vieira Filho

João Bosco Gertrudes

João Bosco Ribeiro do Val

João Carlos Martins de Almeida

João Henrique Kleinschmidt

João Marcos Travassos Romano

João Y. Ishihara

Juan Francisco Camino dos Santos

Juliana Lopes

Juliana Miyoshi

Juliano Fujioka Mologni

Juliano Rodrigues Brianeze

Jurandy Almeida

Jussara Rodrigues Ciappina

Jussi Kangasharju

Jérika Suely Lamas

Júlio César Medeiros Diniz

Júlio César Rodrigues F. de Oliveira

K Katia Franklin Albertin

Kleber Betini Vieira

L Leonardo Andre Ambrosio

Luiz Alberto Castro de Almeida

Luiz Carlos Barbosa

Leonardo Novaes do Nascimento

Laurent Hardouin

Leandro Marques

Leandro Nunes de Castro Silva

Leandro Percebon

Leandro Tiago Manêra

Leandro de Campos Teixeira Gomes

Lee Luan Ling

Leo Pini Magalhaes

Leonardo A. Gomes

Leonardo André Ambrósio

Leonardo Lorenzo Bravo Roger

Leonardo Ribeiro de Carvalho

Fonseca

Leonardo Tomazeli Duarte

Leonardo de Souza Mendes

Leticia Rittner

Lourival Aparecido de Gois

Luciana Casacio

Luciano Bernardes de Paula

Luciano Leonel Mendes

Lucila Helena Deliesposte Cescato

Lucio Agostinho Rocha

Luis Antonio Rodrigues

Luis Enrique Gutierrez Rivera

Luis Geraldo Pedroso Meloni

Luis Noguera

Luiz Antonio Maccari Junior


Luiz Carlos Barbosa

Luiz Carlos Kretly

Luiz Carlos Pereira da Silva

Luiz Cesar Martini

Luiz Eduardo da Silva

Luiz F. Bovolato

Luiz Felipe Mendes de Moura

Luiz Humberto Rabelo Sucupira

Junior

Luiza Amalia Pinto Cantão

Luzinete Cristina Bonani de Faria

Luís Fernando Caparroz Duarte

Luís Otávio Mataveli

Luís Rogério Gomes de Almeida

M M. F. Rautemberg

Márcio Castro Silva-Filho

M. Tazil

Madson Cortes de Almeida

Manfred Fritz Bedriñana Aronés

Manish Sharma

Marcel S. Silva

Marcelo Abbadel

Marcelo Paravisi

Marcelo Ribeiro Nascimento

Marcelo S. Castro

Marco Antonio Robert Alves

Marco Aurelio Cazarotto Gomes

Marconi Kolm Madrid

Marcos Julio Rider Flores

Marcos Lordello Chaim

Marcos Nereu Arenales

Marcos Rogério Salvador

Marcos Sergio Gonçalves

Marcus Pantoja da Silva

Maria Cristina Dias Tavares

Maria Leopoldina Martins N. S.

Gonçalves

Mariana Sacrini Ayres Ferraz

Mariella Renata Cumpa Aurich

Marina B. Duque

Marina Carneiro Monteiro

Marina Lavorato de Oliveira

Marina Tachibana

Marinho G. Andrade

Mario Jino

Mario Lemes Proença Junior

Marjorie F.R. Silva

Marli de Freitas Gomes Hernandez

Mateus Bonadiman

Mateus Giesbrecht


Maurício C. Oliveira

Maurício Gomes Duarte

Maurício Silveira

Max Henrique Machado Costa

Mayk Vieira Coelho

Mercedes Rocío Gonzales Márquez

Mercio Botelho Faria

Michel Bortolini Hell

Michel Daoud Yacoub

Michel Zamboni Rached

Miguel de Teive

Milton Elvis Zevallos Alcahuaman

Milton Evangelista de Oliveira Filho

Mitchell Omar Calderon Inga

Monica de Souza Zambelli

Murilo Bellezoni Loiola

Márcia Zotti Justo Ferreira

Márcio Aparecido Muller

Márcio Júnior Lacerda

Mário Uliani Neto

N Napoleão dos Santos Ribeiro

Natália Ferreira Oshiyama

Newton Soares da Silva

Niederauer Masterali

Nilson Antunes

O Odair Jacinto da Silva

Oderson Dias de Mello

Orlando Petrucci Junior

Oscar de Lima

Otávio Augusto Salgado Carpinteiro

P P. A. Figueiredo

Pablo Alberto Dalbem de Castro

Pascal Larzabal

Patricia Mestas Valero

Patrizio Colaneri

Patrícia L. Cavalcante

Paula Dornhofer Paro Costa

Paulo Anderson Holanda Cavalcante

Paulo Augusto Valente Ferreira

Paulo C. M. Meira

Paulo Cardieri

Paulo David Battaglin

Paulo Licio de Geus

Paulo Marcos Siqueira Bueno

Paulo Morelato Franca

Paulo Victor de Oliveira Miguel

Pedro Augusto Munari

Pedro Carvalhaes Dias

Pedro Luis Dias Peres

Pedro Paulo Martins de Oliveira

Pedro Xavier de Oliveira

Percy Nohama

Peter Jurgen Tatsch

Philippe Forster

Pierre Alexandre Bliman

Plinio Cesar Simões Fernandes

Pyramo Pires da Costa Júnior

R R. P. Ferreira

R. Yoshioka

R.C. Bansal

R.L. Braga

Rafael Araújo Rodrigues

Rafael Carvalho Figueiredo

Rafael D. C. Santos

Rafael Krummenauer

Rafael Martins Buck de Godoy

Rafael Navet de Souza

Rafael Pasquini

Rafael Santos Mendes

Rangel Arthur

Rausley Adriano Amaral de Souza

Regina Maria de Moraes

Regina de Oliveira Moraes

Reginaldo Palazzo Junior

Reinaldo Wilson Vieira

Renan Broska Amstrong

Renan R.S. Lobo

Renata Mataveli Viti

Renato Alves Borges

Renato Baldini Filho

Renato da Rocha Lopes

Ricardo Alves de Souza

Ricardo Capitanio Martins da Silva

Ricardo Coração de Leão Fontoura

de Oliveira

Ricardo Coêlho Silva

Ricardo José Gabrielli Barreto

Campello

Ricardo Menezes Salgado

Ricardo Oliveira

Ricardo Paranhos Velloso Violato

Ricardo Pureza Coimbra

Ricardo Ribeiro Gudwin

Ricardo Suyama

Ricardo Torquato Borges

Ricardo Wada

Ricardo da Silva Souza

Richard Middleton

Robert H. Middleton

Robert Shorten

Roberto de Alencar Lotufo

Roddy Elky Ramos Gonzales

Rodolfo Manuel Moreno Martinez

Rodolfo Oliveira

Rodolfo da Silva Villaça

Rodrigo Fernandes Vidigal

Rodrigo Garcia-Valle

Rodrigo Horikawa Watanabe

Rodrigo Pasti

Rodrigo Sanches Miani

Rodrigo de Almeida Gonçalves

Rogerio Valentim Gelamo

Rogério Seiji Higa

Romis Ribeiro de Faissol Attux

Rosana Almada Bassani

Rosangela Ballini

Ruben Augusto Romero Lazaro

Rubens H. Korogui

Rubén Romero

Rúbia Mara de Oliveira

S S. Kong

Stanislav Moshkalev

Saide Jorge Calil

Samuel Polato Ribas

Secundino Soares Filho

Selene Loibel

Sergio Santos Muhlen

Shusaburo Motoyama

Sidarta Ribeiro

Sidney Pinto da Cunha

Silvia Maria Simões de Carvalho

Silvio Renato Messias de Carvalho

Silvio S. Segura

Simon L. Cotton

Sophie Tarbouriech

Soraia Raupp Musse

Stefano Faralli

Sérgio Kurokawa

Sérgio Pires Pimentel

T Takaaki Ohishi

Talía Simões dos Santos

Tatiane Silvia Leite

Taís Calliero Tognetti

Thiago Henrique Gomes Silva

Thienne de Melo e Silva Mesquita

Johnson

Tiago Agostinho de Almeida

Tânia Basso

U Ugo Silva Dias

102 Sinopse da FEEC

V V. Kumar

Valentina Donzella

Vanessa Testoni

Veer P. S. Awana

Vera Lucia da Silveira Nantes

Button

Veronica Toccafondo

Vicente Idalberto Becerra Sablón

Victor Baptista Frencl

Vinicius Amaral Armentano

Vinicius José Andrade Braga

Vinícius Foletto Montagner

Vitaly F. Rodríguez-Esquerre

Vitor Afonso

Vitor Baranauskas

Vitor Bedotti Ribeiro

Vitor Hugo Almeida Marques

Vitor Vale Do Nascimento

Vivaldo Fernando da Costa

Vivian Cardoso de Morais Oliveira

W Wagner Caradori do Amaral

Walmir Matos Caminhas

Walmir de Freitas Filho

Walter Furloni

Walter Wong

Walter da Cunha Borelli

Wellington Roque

Wilfredo Jaime Puma Villanueva

William Dias Belangero

William G. Scanlon

Wilsun Xu

Wu Shin Ting

Y Yannick Deville

Yull Heilordt Henao Roa

Yuzo Iano

Z Z. Y. Dong

Master in Science Listed below the names of our new Masters, that have received their grades from the FEEC master program in 2010.

Adolfo Fernandes Herbster

Alan Godoy Souza Mello

Alessandro Camolesi

Alex Pereira França

Ana Carolina Silveira

Anderson Wedderhoff Spengler

André Filgueiras De Araujo

André Körbes

Beatriz de Lima Tavares

Carlos Alberto Souto Junior

Cecília Morais Quinzani

Christian Medeiros Adriano

Clausius Duque Gonçalves Reis

Cristiano Roberto De Souza

Cristina Wada

Daniel Nascimento Duplat

Danilo Basseto Do Valle

Debora Dias Leister Batista

Dherik Barison

Eduardo De Souza Rosa

Fábio Soares Rocha

Felipe Marques Pires

Fellipe Saldanha Garcia

Fernanda Passos Dos Reis Ervilha

Fernando Cardoso Fajoni

Filipe de Oliveira Pereira

Floriano Torres Neto

Geraldo Ramos Falci Júnior

Gilliard Nardel Malheiros Silveira

Giovanni Curiel Dos Santos

Greice Martins de Freitas

Guilherme Silveira Rabelo

Henri Shinichi de Souza Okajima

Igor José Ferreira De Freitas

Ismael Mattos Andrade Ávila

Jakson Paulo Bonaldo

Jânio Coutinho Canuto

João Luiz Florio

Joelma Cristina Costa

Jose Douglas Bertazzoni Zambianco

José Erick de Souza Lima

Jose Luis Azcue Puma

Karinne Saraiva Da Silva.

Levy Boccato

Luciana Casacio

Luis Fernando Caparroz Duarte

Luis Rogério Gomes de Almeida

Marcelo Richter Fernandez

Márcio Júnior Lacerda

Marcus Pantoja Da Silva

Maria Leopoldina Martins Neves

Seixas Gonçalves

Marina Tachibana

Matheus Fernandes De Oliveira

Natália Ferreira Oshiyama

Nilsa Toyoko Azana

Nínive Katarina Soares Carniato

Patrícia Lopes Cavalcante

Paulo César Magalhães Meira

Paulo David Battaglin

Rafael Carvalho Figueiredo

Rafael Fontes Souto

Rafael Martins Buck De Godoy

Ramiro Roque Antunes Barreira

Raquel Guerreiro Machado

Renata Mataveli Viti

Renato Maioli Castilho

Ricardo Paranhos Velloso Violato

Rodrigo Fernandes Vidigal

Tania Basso

Tiago Fernandes Tavares

Tiago Rodarte Ricciardi

Victor Baptista Frencl

Doctors Listed below the names of our new Doctors, that have received their grades from the FEEC doctoral program in 2010.

Adriano Luís Toazza

Alexandre de Andrade

Alfeu Joãozinho Sguarezi Filho

Andréa Santos Leite Da Rocha

Bruno Bogaz Zarpelão

Carlos Henrique Da Silva Santos

Carlos Nazareth Motta Marins

Christian Rodolfo Esteve

Rothenberg

Cresencio Silvio Segura Salas

Eduardo Jorge Valadares Oliveira

Fabrício Olivetti De França

Grace Silva Deaecto

Jacson Weber De Menezes

Joni De Almeida Amorim

Kleucio Claudio

Leandro Bento Sena Marques

Leandro Tiago Manera

Leonardo Mendonça Oliveira de

Queiroz

Luís Henrique Sacchi

Manish Sharma

Marcelo Augusto Costa Fernandes

Marcelo Gradella Villalva

Marina Lavorato De Oliveira

Milton Evangelista de Oliveira Filho

Paulo Victor De Oliveira Miguel

Rafael de Almeida Ricardo

Rodolfo Manuel Moreno Martinez

Silvia Maria Simões de Carvalho

Tiago Agostinho De Almeida

Tomás Antônio Costa Badan

Ugo Silva Dias

Secretariat We thank FEEC staff members that helped us produce this volume of ―Sinopse da FEEC‖. Special thanks to Miss Gislaine

Fernandes, for her patient article search on the web, to Mrs. Noemia da Silva Barros Benatti, for the insertion of thesis and

dissertation data, and to all department secretaries, listed below, for their assistance.

- Alaide da Silva Ramos (DECOM);

- Ana Flavia da Silva (DT);

- Carlos Eduardo Santos (DEB);

- Carmen Aparecida Fonseca (DCA);

- Cynthia Jazra Nakamura (DMO);

- Ester Marçola Ferreira Mendes (DEMIC);

- Giane Cristina Sales Geraldo (DMCSI);

- Jaqueline Bisson E. Lopes (DSIF);

- Juraci Soares de Souza (Diretoria);

- Marcia Helena Gibim Fracaro (DENSIS);

- Solange Espirito Santo de Souza(DSCE);

- Suzete Terezinha de Freitas Zainum Nogueira

(DSEE).

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