研究報告 - Akita U...平成 21 年 10 月 23 日印刷平成 21 年 10 月 30 日発...

AB面を通過する流体の移流量を表す概略図．（関連研究報告：足立，pp.25-34）

秋田県産天然ゼオライトから得られたジオポリマーの走査電子顕微鏡写真．(a)ケイ酸ナトリウム溶液を用いなかった場合．(b)ケイ酸ナトリウム溶液を使用し4日間養生した場合．（関連研究報告：Jha,V.K.他，pp.35-40）

鉱専時代の列品室．（鉱業博物館所蔵）（関連解説：丸山，pp.45-55）

秋　田　大　学工学資源学部

研究報告第 30 号

秋田大学工学資源学部

秋田大学工学資源学部研究報告

　　第三十号

平成

二十一

年

平成21年10月発行

秋田大学工学資源学部〒010-8502 秋田市手形学園町1-1http://www.eng.akita-u.ac.jp/

平成 21 年 10 月 23 日　印刷

平成 21 年 10 月 30 日　発行

　秋田大学工学資源学部〒010-8502 秋田市手形学園町１番１号

電話（018）889-2305（総務係）

印　刷　有限会社　三　浦　印　刷〒010-0925 秋田市旭南三丁目７番５号

電話（018）862-2792

（非　売　品）

編集兼発行者

ISSN　1345-7241


第 30 号

平成 21 年 10 月

目　　　次

研究報告

心拍変動によるVDT作業者のストレス・疲労の定量的検討 ………………………………………………… 高橋圭太，井上浩　１

スペインのマイクロクレジットは“手段”か“目的”か……………………………………………………………… 坪井ひろみ　９

等時圧密曲線（アイソクローン）の簡易な計算式について……………………………………… 五十嵐勝，及川洋，荻野俊寛　15

CLSVOF法を用いた気液二相流の数値解析手法 ………………………………………………………………………… 足立高弘　25

Utilization of Akita’s Clinoptilolite Zeolite for the Production of Cation Exchangers and Geopolymers

　　　　　　…………………………………………………………………………… Vinay Kumar JHA and Shigeo HAYASHI　35

解　　説

創造能力の育成について………………………………………………………………………………………………………… 大好直　41

鉱山地質学教室の歴史………………………………………………………………………………………………………… 丸山孝彦　45

研究論文目録（2008） ……………………………………………………………………………………………………………………… 　57

平成20年度博士論文題目リスト…………………………………………………………………………………………………………… 　90

平成20年度修士論文題目リスト…………………………………………………………………………………………………………… 　91


#30号-本文.indd 1 10/04/21 9:12

編集委員会

機　械　工　学　科　　　田　子　　　真

（委員長）

地球資源学科大　川　浩　一環境応用化学科井　上　幸　彦

生命化学科藤　原　一　彦材料工学科佐　藤　芳　幸

情報工学科高　橋　秋　典電気電子工学科水戸部　一　孝

土木環境工学科徳　重　英　信環境資源学研究センター吉　村　　　哲

#30号-本文.indd 2 10/04/21 9:12

1

** **

A Quantitative Analysis on Stress and Fatigue for VDT Workers Measured by Heart Rate Variability (HRV)

Keita Takahashi** and Hiroshi Inoue**

Abstract Recent advances of office automation and information technology cause the increase of the complaint of ocular fatigue,

musculoskeletal fatigue and mental fatigue for VDT (visual display terminal) workers. It becomes obvious as problem on industrial safety and health. A quantitative analysis on the stress and fatigue by scientific data is very useful. In this paper, the results of quantitative analysis focused on total working hours with quantitative indexes of HRV (heart rate variability) used on evaluation in autonomic function are discussed. VDT workers group with longer total working hours has different HRV and CVrri (Coefficient of variation of R-R interval) than one of control group. The extent of stress and fatigue may differ with total working hours.

1

OA

(1) 96%88%

Visual Display TerminalVDT VDT

VDT25

VDT

VDT 35%78%

(1) VDT

(2)

2009 7 28 ** Department of Electrical and Electric Engineering Faculty of Engineering and Resource Science Akita University

(3) VAS Visual Analogue Scale

(4) “ ”

VDT

2 2 1

A 10 32±3.24.1±3.4 B 2 1832±11 1.6±1.2 VDT

9 21A

BVDT

9:00-18:001

秋田大学工学資源学部研究報告，第30号，2009年10月

#30号-本文.indd 3 10/04/21 9:12

2 高橋圭太・井上浩

15:00-18:0020 (5) 8

6 6Yes No

6A 8 B

4

2

2 2 + - N 3FUKUDA DENSHI TE-43

NIHON KODEN WEC-7101

AD 2kHzPC 1 2

R-R R-R interval RRI 3RRI

2Hz2

Heart Rate HR 60s/RRI 256s RRI Coefficient of variation of RRI CVrri

RRI 256s /RRI 256s

FFT RRIPower Spectrum Density PSD

4 3

Low Frequency LF 0.05-0.15Hz

High Frequency HF 0.15-0.45Hz

LF/HF

LF Mayer10 0.1Hz Mayer

(6)

HF9 /

0.15Hz

(6) LF/HF

(6)

1

2

3 RRI

Number of data

Am

plitu

de o

f EC

G

[V]

RRI1 RRI2

R

Q S

PT

time [s]

RR

I [

ms]

#30号-本文.indd 4 10/04/21 9:12

3心拍変動によるVDT作業者のストレス・疲労の定量的検討

4 RRI

2 3 (7)- (13)

1

RRI

(7) 2

RRI300

Rosenstein

RRIdt

6 (8) 5t i y(t i)

y(t j) 2 dt = 2.5s 0.5s

5 i (t i ,dt) 1

)()(

)dt()dt()dt,(

ij

ijii tyty

tytyt 1

| y(t j)- y(t i)| y(t i)- y(t j)

i = 1 2 …N N RRI2 3

= 5s0.5s 10

N

1)dt,(log

N1)dt,(log

iii tt 2

)dt,(log1),dt ( t 3

)dt,(log t

3 3 1 VDT RRI

VDT 1 5 ×52

260 1 8

A 1000 14000 8000 5 18000 2

4000 8000 A-14000 8000 5 n = 20 4A-2 4000 8000 A-1

4 B AB-1 0 2000

7 n = 28 B-2 2000 4000 7n = 28 B-3 4000 8000 6 n = 24

C 9 n = 181

3

1

A-1 A-2 B-1 B-2 B-3 C

[h]

5200

±1470

5200

±1470

823

±501

2377

±478

6327

±1569-

34±2.1 34±2.1 36±13 27±12 32±7.6 21

Frequency [Hz]

PSD

[m

s2 /Hz]

LF HF

#30号-本文.indd 5 10/04/21 9:12


40

60

80

100

120

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

HR

5 a HR

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

CV

rri

5 b CVrri

0

2000

4000

6000

8000

10000

12000

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

LF [m

s2 ]

5 c LF

0

1000

2000

3000

4000

5000

6000

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

HF

[ms2 ]

5 d HF

0

1

2

3

4

5

6

7

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

LF /

HF

5 e LF/HF

0

0.02

0.04

0.06

0.08

0.1

0.12

(A -1) (A-2) (B-1) (B-2) (B-3) (C)

[ ]

5 f

NS

5 VDT RRI

p < 0.01

p < 0.01

p < 0.01

p < 0.01

p < 0.05

p < 0.01

#30号-本文.indd 6 10/04/21 9:12


5 VDT RRI

median25% 75%

(15) HR VDT B-3

p < 0.01 Scheffe’s F-testA-1 B-1 B-2 B-3

p < 0.01 5 a CVrri VDT p

< 0.01 A-1 B-3B-2 p < 0.01 5 b LF VDT p

< 0.01 5 c HF VDT A-1 B-3

p < 0.05 p < 0.01 5 d LF/HF VDT B-1p < 0.01 A-2 B-1

p < 0.05 5 e VDT

5 f 3.2 RRI

2 VDT RRI

A-1 6 VDT 8

6 6

8 B-1 B-2p < 0.05 6

6A-1 B-2 B-1

p < 0.05

2 RRIA-1

HR CVrri LF HF LF/HF

0.26 -0.03 0.00 -0.11 0.19 -0.25

-0.80 0.01 0.00 0.32 -0.47 0.50

0.07 0.19 -0.20 0.08 -0.08 -0.11

0

1

2

3

4

5

6

7

8

(A -1) (A-2) (B-1) (B-2) (B-3)

[ ]

6 a

0

1

2

3

4

5

6

(A -1) (A-2) (B-1) (B-2) (B-3)

[ ]

6 b

0

1

2

3

4

5

6

(A -1) (A-2) (B-1) (B-2) (B-3)

[ ]

6 c

6 VDT

NS

p < 0.05

p < 0.05

p < 0.05

#30号-本文.indd 7 10/04/21 9:12


4 VDT B-3 HR B-1

B-2HR HR

HRCVrri (16)

HF VDTVDT

A-1B-3 B-1

B-2B-1 2000

B-22000-4000

B-3

VDTVDT

RRI

5 VDT

VDTRRI

6VDT RRI

20004000 VDT

VDT

1 15

URL http://www.mhlw.go.jp/toukei/ itiran/roudou/saigai/anzen/03/index.html

2 ( ) ( ) VDT

28 4 p-p 295-302 2004 3

VDTC 128 1 pp 45-54 2008

490 3 pp 537-547 2008

5 VDTURL http://

www.mhlw.go.jp/houdou/2002/04/h0405-4.html 6 4 R-R

pp 164-165 2007 7

40 5 pp 254-263 2004 8 4 R-R

p 178 2007 9

MBE2008-12 pp 57-622008 10

CAS2003-3 pp 13-182003

11 M. T. Rosenstein, J. J. Collius C. J. De Luca A practical method for calculating largest Lyapunov exponents from small data sets, Physica D 65 pp 117-134 1993

12pp 156-185 2000

13NLP2008-30 pp 57-60

2008

#30号-本文.indd 8 10/04/21 9:12


14 Gari D. Clifford, Francisco Azuaje, Patrick E. Mcsharry Advanced Methods and Tools for ECG Data Analysis ARTECH HOUSE

15

C 123 5 p 9032003

16212 4 pp 243-246 2005

#30号-本文.indd 9 10/04/21 9:12

#30号-本文.indd 10 10/04/21 9:12

9秋田大学工学資源学部研究報告，第30号，2009年10月

1.

1

2009 7 17 ** Faculty of Engineering and Resource Science, Akita University.

15 20

Vaci2

**

Is Microcredit in Spain a Means or an End? Hiromi Tsuboi**

Abstract

Microcredit is well known as one of the most effective instruments to reduce poverty, and its long-lived development

movement has spread globally, not only in the developing countries but in the developed ones. In Spain, almost all of the

financial institutions have already introduced microcredit, and they have implemented small loans without collateral to

customers who were previously excluded from the formal credit system. The financial institutions in Spain are supposed to

contribute a part of their profit for social activities, and microcredit is likely to be considered as one of them.

This report, based on my fieldwork carried out in March 2009, first provides a general overview of microcredit in

Spain. Then, it describes the success stories brought by two women, and indicates these stories are rather rare cases and

microcredit conducted in Spain is in a particular situation. Moreover, it suggests microcredit does not function very well.

Finally, it discusses whether microcredit in Spain is a means or an end.

#30号-本文.indd 11 10/04/21 9:12

10 坪井ひろみ

2009 33 NGO

1

2

2.

NGO MITA Incluye Cajasol

3 1

2

3 5 5 6

25,000

4

5 NGONGO

NGO

NGONGO

NGO

6

7NGO

NGO

NGO

8

3

3.

3.1

OECD 1 (1) 2000

20053.0 8.1

270 OECD

NGO

#30号-本文.indd 12 10/04/21 9:12

11スペインのマイクロクレジットは“手段”か“目的”か

18.9 10.3 45

(2)

1 OECD (1)

2000 2005 2000 2005 - 27.7 - 12.7

6.7 9.3 7.3 7.5 10.2 12.7 17.0 15.1

4.8 6.3 9.1 8.5 11.1 12.7 11.4 11.6

9.7 12.8 8.6 10.1 2.0 3.7 13.7 12.6

7.7 8.1 17.4 11.0 33.5 38.9 7.5 6.9

10.3 10.3 10.4 10.8 6.0 7.4 7.6 7.6 3.6 5.4 14.9 14.2

3.0 8.1 18.9 10.3 11.4 14.4 12.0 11.3

10.7 11.6 15.2 14.4 - 14.1 - 9.6

3.2

9 73 2008

11.3 (3)

4

Cajasol

4 5 1 2

5 5 14,000

1 1

4

5

#30号-本文.indd 13 10/04/21 9:12

12 坪井ひろみ

3.3

5 6

500

1 2

6 7 9 4 610

5 5 15,0004,000 19,000280

6

7

2

2

4.

1 NGO 4 5

NGO

50 NGO

2 NGO

10

#30号-本文.indd 14 10/04/21 9:12

13スペインのマイクロクレジットは“手段”か“目的”か

3

credit

30 40 2(4)

4

60

3(5)

84 7.5805 115 7 1

5 6

5.

(6)

90

10

60

90

(7) NGO

2 4 2002-2003 2004 2005-2006

15,119,672.38 4,712,646.95 4,159,294.87 18,782 20,140 19,436

24,824,322.11 6,536,031.24 6,611,859.09 30,838 27,927 30,897

39 28 37

3 (5) 2002-2003 2004 2005-2006 2007 8

18,000,000 12,500,000 12,500,000 20,000,000 84 38 33 7.5 805 234 214 115

#30号-本文.indd 15 10/04/21 9:12

14 坪井ひろみ

NGO

2009 7 73

9NGO

1 Catarina Reis Oliveira and Jan Rath (2008): Introduction to the Special Issue, Journal of the Portuguese Immigration Observatory, No.3, October 2008, p.16.

2 Catarina Reis Oliveira and Jan Rath (2008): Introduction to the Special Issue, Journal of the Portuguese Immigration Observatory, No.3, October 2008, p.17.

3 JETRO 2009.3.27http://www.jetro.go.jp/world/europe/es/basic_01

4 5 6 Yunus, Muhammad (2008): Creating a World Without

Poverty: Social Business and the Future of Capitalism, Subarna, pp.21-25.

7 Mckernan, Signe-Mary (2002): The Impact of Microcredit Programs on Self-Employment Profits: Do Noncredit Program Aspects Matter?, The Review of Economics and Statistics, Vol. 84, No.1, pp.93-115.

#30号-本文.indd 16 10/04/21 9:12


A Simple Equation for Calculating the Isochrone Masaru Igarashi**, Hiroshi Oikawa*** and Toshihiro Ogino***

Abstract A simple yet approximately accurate formula is developed for calculating the degree of

consolidation U z at depth z . The formula was obtained by fitting of various functions to the actual U z - z curves. Based upon this investigations, the Weibill distribution curve which provided a best-fit to the actual U z - z curves was selected as a proposed equation. Using proposed equation, the degree of consolidation U z can be easily calculated with less than 3% error.

Uz

Uz (1)

Uz

U

Uz

1 Uz

U

Uz

Uz

Uz

Dia Consultants Co., Ltd

Dept. of Civil and Environmental Engineering, Faculty of Engineering and Resource Science, Akita University

1 U zU

z H

Hz

z

0

1

2

0 50 100

0

U zU

U

zU

%50197.0

UvT

#30号-本文.indd 17 10/04/21 9:12

16

Uz

Uz

zU vT zU z Tv

z

Uz Uz

U

UTerzaghi t 0

t 0

U

UM

M Tm

v1 22

0

2exp (1)

M m2 1 2 m(1)

M(1)

Tv

Tv

Tv =0.0001 U 1.1%(1)

2(a)(c) 2 (a) Tv 50

m=50 (1)m=50

2 (b)m=100

2 (c)

Tv (1)

2 (b) Tv

62 5

0.011282 (c)

115 9

U

90% 0.848 (1), (2)

(1)1U

0.000.010.020.030.040.050.060.070.080.090.10

0 20 40 60 80 100 120 140

0.011250.011260.011270.011280.011290.011300.011310.011320.011330.011340.01135

40 60 80 100 120 140

0.0112821110

0.0112821115

0.01128211200.0112821125

0.0112821130

0.0112821135

0.01128211400.0112821145

0.0112821150

100 110 120 130 140

U

U

U U

2 U Tv =0.0001

1 90%

TvU

0.847 89.973

0.848 89.998

0.849 90.022

五十嵐勝・及川洋・荻野俊寛

#30号-本文.indd 18 10/04/21 9:12

17

1 290% 3

90% 0.848U

1% 5

(1) z

Uz

56

U Uz

UU (1)

Terzaghi(2) (3) U

T

U U

U U

v4 100

0 52 6

1781 0 933 100 52 6

2

10

.

. . log .

(2)

Hansen (4)

U TT

v

v

3

3605.

(3)

3 (2) (3) U

(4)

(4)

(2) 0.1%(3) ±0.6%

U

Uz

U

z Uz

Uz

Uz

Uz

(2) (3)

-1.0

-0.8

-0.6

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

0.0001 0.001 0.01 0.1 1 5

vT

(3)

(2)

4 z 05. Uz

zU

-0.00003

-0.00002

-0.00001

0.00000

0.00001

0.00002

0.00003

70 80 90 100 110 120

5.00001.0

zTv

5 U Uz

10.90.80.70.60.50.40.30.20.1

0

0.0001 0.001 0.01 0.1 1 5

vT

Uz

U 05.0z

1.0z

2.0z

3.0z

5.0z

0.1z

vTU

等時圧密曲線（アイソクローン）の簡易な計算式について

#30号-本文.indd 19 10/04/21 9:12

18

Uz

UM

M z M Tzm

v1 2

0

2sin exp (5)

z z H zH 0 1z

(5) (1)4 z 05. Tv 0 0001.Uz (5)

sin

4 795

7979 81

Uz

Uz Uz Tv

5 UU Tv

Uz

UUz

U

Uz Tv Uz zUz

5 Uz Tv

Uz z

5 Uz Tv

6(a) (b) 6 (a)Hansen U Tv

(6) 6 (b)(7)

U TT mz

vm

vm

m2

21

3(6)

U n nTz

v

n

12

3

exp (7)

m1 m2 m3 n1 n2 n3 z

6 Uz Tv

(6) (7)

Uz Tv

1

0.8

0.6

0.4

0.2

0

0.0001 0.001 0.01 0.1 1 5

1

0.8

0.6

0.4

0.2

0

vT

zU

zU

05.0z

05.0z

1.0

1.0

3.0

3.0

5.0

0.1

0.1

6 Uz Tv (6) (7)

Uz

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

-5 -4 -3 -2 -1 0 1 2 3 4 5

(6)

(7)

z

五十嵐勝・及川洋・荻野俊寛

#30号-本文.indd 20 10/04/21 9:12

19

Uz (6) (7)

1 7(6) z

±5%

(7)±4%

(6)

Uz z

(8)8

U zz exp( ) (8)

Tv

8 6Uz z (8)

Uz z (8)(8) Uz

2 9(8) Uz

±3% (6) (7)±5% ±4%

Uz

(6) (7)(8) (6) (7) 3

(8) 2

Uz

(8)1 (6) (7)

z m1 m2 m3 n1 n2 n3

2 (8)Tv

2

3.3 (8)(8) (9)

2

ln ln ln lnU zz (9)

10 (9)Tv =0.5 ln z

z 1

2

2Tv

Uz

3 9

112

8 U z z (8)

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0

zU

z

01.0vT

3.0

1.0

5.0

0.1-5

-4

-3

-2

-1

0

1

2

3

4

5

0.0001 0.001 0.01 0.1 1 5

vT

(%

)

9 (8) Uz

等時圧密曲線（アイソクローン）の簡易な計算式について

#30号-本文.indd 21 10/04/21 9:12

20 五十嵐勝・及川洋・荻野俊寛

Tv 0 0009.15. Tv

0 001 10. .Tv

2

(9) 2ln lnU z ln lnU z

Uz

10Uz z (8)

2 (8)(maximum likelihood method) (5)

Deming (6)

(9) 2(8)

Tv

Uz z 8

12 A10

ln lnU z ln z9.0z %2

Uz

+5% A

A A

z 01.

B +5%+2%

1 2 (6) (7)(8) 7

9

zU

lnln

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

-3.5 -3 -2.5 -2 -1.5 -1 -0.5 0zln

10 ln lnUz ln z

5.0vT

11 2

(%

)

vT

-6-5-4-3-2-10123456

0.0001 0.001 0.01 0.1 1 5

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

-5 -4 -3 -2 -1 0 1 2 3 4 5

z

0

A

B

12

#30号-本文.indd 22 10/04/21 9:12

21等時圧密曲線（アイソクローン）の簡易な計算式について

Uz

(8)Tv

13(a),(b)Tv

Tv

Tv 24Tv Tv

(8) Tv Uz z

14 Uz

±3%14 Tv 4

Tv

Tv 0 001. 0.006 0.1

Tv 0.006 24 Tv Tv

2 Tv

Tv Tv Uz

Uz

Uz

Tv 0 006 01. .Tv

Tv Tv 2 Tv

Tv

2 4 Tv

0.1 0.1 2Uz (10)

15±3%

U

T

Tz

T

T z

z

v

v

T

v

vT

v

v

0 01

0 697

01 3 0

20 53 5 032

0 6571 282 0 577

0 425 0 630 0 253

.

exp .

. .

exp . exp .

.. .

. . . ln

(10) Uz

(10)Tv 01. Uz

Uz 0.24%

0.0001

0.001

0.01

0.1

1

10

100

1000

10000

0.0001 0.001 0.01 0.1 1 5

00.20.40.60.8

11.21.41.61.8

2

0.0001 0.001 0.01 0.1 1 5

vT

vT

vT

Tv Tv

2 (8)Tv 0 0.001 0.001 0.006 0.006 0.1 0.1

0 026 1 205. .Tv

0 427 0150. . ln Tv

0164 0 936. .Tv

0 756 0102. . ln Tv

0 697 0 657. .Tv

1282 0 577. . Tv

20 53 5 032 0 425. exp . .Tv

0 630 0 253. . ln Tv

01. Tv Tv 0 006 01. .Tv Tv

#30号-本文.indd 23 10/04/21 9:12

22 五十嵐勝・及川洋・荻野俊寛

Uz

Uz Tv zU z

Tv 0.1 0.1

Uz ±3%

Uz

Uz

(1) (1977)pp. 57-67.(2) (2000)

pp. 348-355.(3) Terzaghi, K.(1966): Theoretical Soil Mechanics, John Wiley and Sons, Inc., pp.248-255. (4) Hansen, J. B.(1961): A model law for simultaneous primary and secondary consolidation, Proc. 5th ICSMFE, Vol. 1, pp. 133-136,. (5) (1965) pp. 67-69.(6) (1979)

pp. 255-267.

1 (6) (7) z

z

m1 m2 m3 n1 n2 n30.05 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

0.65 0.78 0.95 1.15 1.31 1.50 1.60 1.71 1.80 1.87 1.87

3.03 1.67 1.12 0.90 0.97 1.00 1.12 1.27 1.57 1.63 1.70

0.006 0.018 0.051 0.088 0.100 0.107 0.109 0.100 0.081 0.079 0.077

4.45 4.48 4.37 3.90 3.98 3.75 3.45 3.20 3.04 2.87 2.70

-4.47 -4.53 -4.51 -4.02 -3.93 -3.84 -3.36 -3.11 -2.96 -2.75 -2.68

0.995 1.015 1.060 1.106 1.118 1.129 1.120 1.110 1.100 1.090 1.080

0.002 0.007 0.028 0.070 0.115 0.167 0.200 0.245 0.270 0.288 0.290

0.620 0.609 0.600 0.649 0.715 0.803 0.908 1.010 1.105 1.190 1.240

1.67 1.70 2.37 2.62 3.30 3.34 3.46 3.20 3.80 2.59 2.51

-1.79 -1.83 -2.37 -2.59 -3.30 -3.43 -3.49 -3.24 -2.90 -2.57 -2.65

-5

-4

-3

-2

-1

0

1

2

3

4

5

0.0001 0.001 0.01 0.1 1 5

vT

(%

)

14 2

vT

-5-4

-3-2-1012345

0.0001 0.001 0.01 0.1 1 10

15 (10)

#30号-本文.indd 24 10/04/21 9:12

23等時圧密曲線（アイソクローン）の簡易な計算式について

2 3

Tv Tv0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.001

0.0015 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01

0.015 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1

0.15 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.5 2 3

1719.863 725.601 436.592 314.599 241.580 193.737 161.225 137.910 120.325 106.485 72.168 54.272 36.966 28.646 23.453 19.906 17.939 16.511 15.348 14.339 11.112 9.171 7.015 5.818 5.023 4.437 3.995 3.647 3.353 3.114 2.132 1.597 1.005 0.690 0.494 0.361 0.268 0.204 0.151 0.115 0.030 0.008 0.001

1.810 1.705 1.642 1.606 1.573 1.543 1.518 1.497 1.479 1.462 1.424 1.392 1.350 1.323 1.299 1.279 1.278 1.277 1.277 1.276 1.273 1.270 1.264 1.259 1.253 1.247 1.241 1.236 1.230 1.224 1.105 1.050 0.930 0.855 0.790 0.750 0.720 0.690 0.660 0.640 0.530 0.450 0.360

0.000 0.002 0.006 0.000 0.002 0.000 0.002 0.000 0.001 0.015 0.192 0.313 0.489 0.731 0.946 1.077 0.966 1.129 1.168 1.160 1.083 1.239 1.462 1.509 1.465 1.442 1.473 1.442 1.316 1.252 1.834 2.515 2.716 2.396 1.911 1.679 1.431 1.311 1.089 0.906 0.383 0.143 0.013

-0.009 0.000 -0.001 0.000 0.000 -0.003 0.000 -0.002 -0.001 -0.003 -0.176 -0.313 -0.504 -0.780 -0.958 -1.074 -1.003 -1.106 -1.158 -1.181 -1.048 -1.270 -1.470 -1.499 -1.460 -1.470 -1.496 -1.458 -1.417 -1.255 -1.867 -2.535 -2.718 -2.421 -1.919 -1.697 -1.467 -1.021 -1.060 -0.893 -0.380 -0.144 -0.024

0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.001

0.0015 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01

0.015 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1

0.15 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1.5 2 3

- - -

314.599 241.580 193.737 161.225 137.910 120.325 137.648 93.102 66.726 50.608 41.326 33.730 29.474 26.427 22.970 20.610 19.951 14.447 12.017 8.635 6.731 5.561 4.764 4.182 3.736 3.381 3.090 2.164 1.649 1.072 0.749 0.543 0.402 0.303 0.230 0.176 0.135 0.038 0.011 0.001

- - -

1.606 1.573 1.543 1.518 1.497 1.479 1.555 1.520 1.466 1.466 1.463 1.440 1.435 1.432 1.409 1.395 1.411 1.384 1.386 1.350 1.313 1.285 1.262 1.242 1.224 1.209 1.194 1.133 1.086 1.018 0.976 0.947 0.928 0.914 0.903 0.896 0.890 0.876 0.872 0.877

- - -

0.000 0.002 0.000 0.002 0.000 0.001 0.375 0.798 1.165 1.976 2.281 2.329 2.274 2.205 2.127 2.344 2.963 3.753 4.250 4.040 3.845 3.662 3.402 3.112 2.818 2.525 2.246 2.093 3.552 5.079 5.253 4.811 4.158 3.476 2.846 2.303 1.846 0.570 0.168 0.014

- - -

0.000 0.000 -0.003 0.000 -0.002 -0.001 -0.758 -1.331 -0.881 -1.556 -2.035 -1.984 -2.183 -2.322 -2.085 -1.975 -2.388 -2.278 -2.507 -2.113 -1.697 -1.398 -1.175 -0.997 -1.006 -1.163 -1.280 -1.699 -1.823 -2.038 -1.897 -1.685 -1.420 -1.165 -0.943 -0.756 -0.600 -0.181 -0.053 -0.005

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26 足立高弘

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27CLSVOF法を用いた気液二相流の数値解析手法

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28 足立高弘

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30 足立高弘

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32 足立高弘

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34 足立高弘

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35

Utilization of Akita’s Clinoptilolite Zeolite

for the Production of Cation Exchangers and Geopolymers

Vinay Kumar Jha** and Shigeo Hayashi***

Abstract Natural zeolite, clinoptilolite, produced in Akitra prefecture has a large potential for various practical usage. In this

paper, we have tried to synthesize cation exchangers and geopolymers from the zeolite using sodium-silicate and sodium hydroxide as activator. We have varied some parameters like alkali concentration, particle size and curing time in order to improve the quality of cation exchanger and geopolymeric product. The NH4

+ retention capacity of the clinoptilolite is enhanced either by increasing alkaline metal cations content with chemical modification or by reducing particle size or increasing specific surface with mechanical modification. The geopolymer materials synthesized through mechanochemically treated clinoptilolite using NaOH and sodium silicate solutions showed increasing crushing strength up to around 25 MPa with increasing curing time.

1 Introduction

Natural zeolites, which are aluminosilicate minerals and found in volcanogenic sedimentary rocks, possess several important properties including adsorption, cation-exchange, dehydration-rehydration, and catalysis. These natural zeolites have broad range of applications in construction materials, soil improvements for water and nutrient retention, treatment of water and wastewater for removal of heavy metals and nutrients, dietary supplements for farm-raised animals, health care, and other beneficial uses (1).

Clinoptilolite zeolites, (Na3K3)(Al6Si30O72)·24H2O, are one of the naturally existing zeolites. The theoretical cation-exchange capacity (CEC) of Clinoptilolite is about 2.16 meq/g and is able to exchange ammonium-N with sodium and potassium (1). This CEC has been utilized effectively for terrestrial agriculture, where clinoptilolites are first saturated with ammonium-N and then incorporated into crop soils. They act as a slow-release fertilizer, with plants able to extract the sequestered ammonia from the clinoptilolite (2)~(4). Most of the manure-ammonia sequestered in the zeolite is unavailable to nitrifying bacteria because of the small (4-5 angstrom) pore size of the crystal lattice structure (1). Furthermore, clinoptilolites

are also used for animal waste management, replacing clays in the cat litter market and are being used to create odorless, nitrogen-rich compost from farm livestock manures.

Geopolymers are a new fire-, blast- and acid-resistant group of building materials. They are ceramic-like, inorganic polymers produced at low temperatures and have the potential to transform the building products industry. The cost of using geopolymer-based building materials is similar to existing materials but these have greater technical and environmental benefits over the conventional cement type materials. These materials can help to cut back on damage done through industrial spills, improve long term performance, reduce capital or maintenance costs and further help to lower insurance costs. Besides these, geopolymer technology has the potential to reduce emission of carbon dioxide by 80% because high-temperature calcining is not needed while for every one tone of cement manufacturing, one tone of carbon dioxide is produced. Several types of waste product like fly ash, sludge, slag and zeolitic tuffs can be utilized for the production of cation exchangers and geopolymers.

The inorganic geopolymeric materials are normally synthesized using activating solutions of alkali metals as sodium and potassium. These metals are capable of forming highly concentrated aqueous solutions and solvate large amounts of silicon and aluminum. The aluminosilicate geopolymers consist of tetrahedral AlO4

Received July 21, 2009 **, *** Center for Geo-Environmental Science, Faculty of

Engineering and Resource Science, Akita University. ** Present address: Central Department of Chemistry,

Tribhuvan University, Kirtipur, Kathmandu, Nepal.


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36

and SiO4 units polycondensed at ambient temperatures under highly alkaline conditions into three-dimensional structures with charge stabilization provided by alkaline earth ions (5).

Most of the studies on synthesis of geopolymers are carried out using kaolinite, metakaolinite, fly ash, high-calcium slags, blast furnace slag, etc. Several tones of zeolitic fine powder and small granules are thrown away as waste from industrial and agricultural sectors. These byproduct or waste portions of zeolites, which are rich source of alkali-alumino-silicates, can be mechanochemically modified to make them more effective raw materials for the production of cation exchangers and geopolymers.

In this paper, we have tried to synthesize cation exchangers and geopolymers from the granular byproduct of natural clinoptilolite zeolite, which are rich in K2O, Al2O3 and SiO2 contents, with using sodium-silicate and sodium hydroxide as activator. We have varied some parameters like alkali concentration, particle size and curing time in order to improve the quality of cation exchanger and geopolymeric product.

2. Materials and Methods 2.1 Samples preparation and characterization

The natural granules of clinoptilolite zeolite used in this study were obtained from the Futatsui area, Akita, Japan. This granular form of zeolites was ground manually to obtain in powder form by using mortar and pestle. The powder was then modified in two ways: in first case the powder was modified chemically by treating with NaOH solution at room temperature. The solid sample was separated from solution by filtration and washed with distilled water for several times till the effluent became neutral to pH paper. Samples naming for thus obtained products were NZeo (natural zeolite) and Zeo-72 (zeolites treated with NaOH solution for 72 h).

In second case, the powder sample was subjected for mechanical modification by wet-milling in zirconia pot (80 cm3) with zirconia balls (2 mm ) in planetary ball mill ((LA-PO.1, Ito Seisakusho Ltd., Japan) operating at 400 rpm for 24 h with using distilled water. After wet-milling, the slurry was filtered, washed and dried at 80°C for over night. The solid sample was designated as WM-50 (WM

for wet-milled followed by ball to powder mass ratio). The WM-50 sample was further treated with NaOH aqueous solution and then the slurry was filtered, washed and dried at 80°C for over night. This mechanochemically modified sample was designated as WM50-Na.

Powder X-ray diffraction (XRD) patterns were obtained using an X-ray diffractometer with monochromated Cu K radiation (JDX-3530, JEOL, Japan). The chemical compositions of the samples were analyzed by X-ray fluorescence (RIX2000, Rigaku, Japan). The specific surface area and texture of wet-milled samples were obtained by the BET method using a BELSORB-Mini instrument (BEL, Japan) and Scanning Electron Microscope (JSM-5900LV, JEOL, Japan), respectively. 2.2 NH4

+ uptake experiment The uptake of NH4

+ was performed with aqueous NH4Cl solution (Wako, Japan) on NZeo, Zeo-72 and WM-50 under the following conditions: reaction temperature: 25°C, sample/solution ratio: 0.1 g/50 cm3, initial NH4

+ concentration: 28.22 mmol/dm3, reaction time: 24 h. The solution pH was measured just at the time of putting the sample into the solution (initial pH) and after the reaction (equilibrium pH).

After the uptake experiments, the samples were filtered and washed frequently with distilled water. The original NH4

+ solution (prior to uptake) and separated solutions (after uptake) were chemically analyzed for NH4

+, Na+, K+ and Ca2+ ions by ion chromatograph (DX-120, DIONEX, USA).

2.3 Preparation of clinoptilolite based geopolymer

To synthesize clinoptilolite based geopolymer, several parameters such as NaOH concentration, ball to powder mass ratio of wet-milled samples, amount of sodium silicate solution and curing time were taken into account. In first case, WM-20 sample was blended manually for 2 min. using mortar and pestle with NaOH solution with varying concentrations separately. In second case, similar procedure was followed with WM-30, WM-50 and WM50-Na with using single NaOH concentration. In third case, WM-50 sample was blended with NaOH solution with varying the amount of sodium silicate solution (Wako, Japan; Assay: 52-57% and SiO2/Na2O molar ratio: 2.06-2.30). In forth

Vinay Kumar Jha ・Shigeo Hayashi

#30号-本文.indd 38 10/04/21 9:12

37

case, similar procedure was followed with using WM50-Na sample, NaOH solution and sodium silicate solution with varying curing time.

The blended mixtures were separately placed in plastic moulds, sealed with thin plastic films and allowed to cure for 24 h (except the samples designated for curing time variation) at 40°C. After curing thin films were removed and samples were dried at 40°C. After demoulding, the samples were cut into finite sizes and crushed using an Autograph instrument (AGS-J, Shimadzu, Japan) with crosshead speed of 0.5 mm/min. The fragments from the crushing tests of few characteristic samples were powdered and examined by X-ray diffraction, X-ray fluorescence and scanning electron microscope.

3. Results and Discussion 3.1 Sample characterization

The chemical compositions of natural and NaOH treated clinoptilolites are shown in Table 1. The XRD patterns of as-received-ground (NZeo), chemically, mechanically and mechanochemically modified clinoptilolite samples (Zeo-24, Zeo-72, WM-50 and WM50-Na) are shown in Fig. 1. The SEM micrographs of natural, mechanically and mechanochemically modified clinoptilolites are shown in Fig. 2.

There was no any appreciable change of the XRD patterns of natural clinoptilolite after NaOH treatment which indicates no any structural change with the incorporation of exchangeable sodium ions to the natural zeolite.

Almost complete amorphous form of clinoptilolite was obtained with mechanically/mechanochemically modified samples. This effect is attributed to the collision frequency which in tern leads to faster diffusion process (6). When WM-50 sample was treated with NaOH solution, a broad peak at around 2 = 26.5º began to appear which is expected to be the formation of sodium-aluminum-

silicate-hydrate (SASH) phase. The chemical composition data where large amount of Na2O was incorporated during the NaOH treatment also suggests the formation of such SASH phase. The beginning of the formation of crystallization can also be observed in the SEM micrograph shown in Fig. 2. 3.2 NH4

+ sorption NH4

+ uptake experiments with the variation of initial NH4

+ concentration were performed on three samples namely NZeo, Zeo-72 and WM-50. The natural clinoptilolite (NZeo) was selected to obtain its NH4

+ sorption capacity without any modification while Zeo-72 and WM-50 samples were selected to study the impact of its NH4

+ sorption capacity by modifying its chemical composition and specific surface area (by changing from crystalline to amorphous form), respectively. The resulting sorption isotherms are shown in Fig. 3. The maximum

Sample SiO2 Al2O3 Fe2O3 Na2O CaO MgO K2ONZeo 77.96 14.02 1.30 1.15 1.23 0.46 3.88Zeo-72 73.74 14.78 1.62 4.03 1.74 1.15 2.94WM50-Na 60.10 21.90 2.37 10.70 2.69 1.15 1.09

Cu K 2 ( )

Inte

nsity

(a.u

.)

NZeo

Zeo-72

WM-50

WM50-Na

5 10 15 20 25 30 35 40

Fig. 1 XRD patterns of natural, chemically, mechanically and mechanochemically modified clinoptilolite zeolite samples.

Table 1 The chemical compositions (mass %) of natural, chemically and mechanochemically modified clinoptilolites.


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38

NH4+ sorption capacity (Qmax) of natural zeolite (NZeo) is

about 0.89 mmol/g while that of WM-50 is 1.39 mmol/g and the resulting Qmax values increase in the order WM-50 > Zeo-72 > NZeo. The NH4

+ sorption capacity of present natural clinoptilolite is relatively higher than previously reported for natural clinoptilolites. The variation in the NH4

+ sorption capacity of clinoptilolite from various resources is due to the difference in the relative content of alkaline metal cations and chemical-physical pretreatment techniques. The commercial clinoptilolites have much higher NH4

+ sorption capacity in comparison to present modified clinoptilolites. The possible reason for such a higher sorption capacity may be the clinoptilolite for the commercial market would probably be pre-screened and pre-treated to yield an optimal performance by removing inert components (7). 3.3 Geopolymer and crushing strength

A production of good quality geopolymer with higher crushing strength depends on several parameters like concentration of alkali solution, appropriate starting material, use of sodium silicate solution, curing time and temperature.

The crushing strength is sharply increased with increasing NaOH concentration. The basic mechanism of such is the transformation of extremely reactive materials of alumino-silicates under alkaline condition and the dissolution process is initiated by the presence of hydroxyl ions. Higher amounts of hydroxyl ions facilitate the dissociation of silicate and aluminate species, which promote the polymerization (8).

The amorphous nature of starting material is more preferable for geopolymer with better crushing strength.

This can be attributed to the enhanced dissolution of alumino-silicate particulates from amorphous material and thereby accelerated condensation of the monomer in presence of higher NaOH concentration. Furthermore, the process of geopolymerization involves dissolution, polymerization, condensation and hardening steps which are more favorable if the starting material is amorphous in nature.

The crushing strength was found initially increased and then decreased with increasing WM-50 to Na2SiO3 mass ratio. This is expected to be due to excess silicate hinders water evaporation and structure formation (9).

The crushing strength of geopolymers, obtained from WM50-Na with using sample to sodium silicate mass ratio of 2 and 5.0 M NaOH solution as a function of curing time

Equi

libriu

m so

rptio

n, Q

e (m

mol

/g)

Equilibrium concentration, Ce (mmol/cm3)

NZeo

WM-50Zeo-72

0 10 20 30

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Fig. 2 SEM micrographs of natural, mechanically and mechanochemically modified clinoptilolite zeolite samples.

Fig. 3 NH4+ sorption isotherms of natural, chemically

and mechanically modified clinoptilolites.


#30号-本文.indd 40 10/04/21 9:12

39

is shown in Fig. 4. The crushing strength has found sharply increasing with curing time suggesting curing for longer period of time at low temperature is preferable which is in accordance with previous report (10).

The chemical compositions and SEM micrographs of two types of geopolymer products obtained from WM50-Na starting material with and without using sodium silicate solution are shown in Table 1 and Fig. 5 respectively. The polymer phase together with crushing strength were found increased in the sample where sodium silicate was used and at the mean time SiO2/Al2O3 ratio of this sample is higher than the sample where sodium silicate was not used. Thus, it can be said that higher SiO2/Al2O3 ratio is responsible for the formation of polymer and increasing crushing strength of the product. Furthermore, higher Al2O3 content may be suitable for the development of ceramic materials rather than geopolymer products (11).

4. Conclusion The overall ammonium ion retention behavior of the

clinoptilolite produced in Akita Prefecture, Japan is similar to that of clinoptilolite obtained from other resources. The present clinoptilolite has a high affinity for ammonium ion, which is observed across a range of ammonium ion concentrations of interest in the context of water treatment. The NH4

+ retention capacity of natural clinoptilolite is enhanced either by increasing alkaline metal cations content with chemical modification or by reducing particle size or increasing specific surface with mechanical modification.

The geopolymer materials synthesized through mechanochemically treated clinoptilolite using NaOH and sodium silicate solutions with the variations of types of starting material, NaOH concentration, amount of sodium silicate and curing time are mainly amorphous and contain absorbed atmospheric water. Present work will contribute to develop the possible pathway for the optimum utilization of natural resources as an alternative to cement in construction field.

Acknowledgements

We are thankful to Professor Dr. Osamu Yamamoto of Akita University, Center for Geo-Environmental Science for his help to measure the specific surface area and crushing strength of all the samples, to Dr. Yukio Enda of Industrial Technology Center of Akita Prefecture,

Curing time (Day)

Cru

shin

g st

reng

th (M

Pa)

Curing temperature: 40 C

0 1 2 3 4 5

5

10

15

20

25

30

Fig. 4 The crushing strength of samples with the variation of curing time.

Fig. 5 SEM micrographs of geopolymers obtained from WM50-Na (a) without the use of sodium silicate solution and (b) with using sodium silicate solution and cured for 4 days.


#30号-本文.indd 41 10/04/21 9:12

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Environmental System Department for providing us ion chromatograph instrument to use and Dr. Yoshikazu Kameshima of Tokyo Institute of Technology, Department of Metallurgy and Ceramics Science for providing the chemical composition data of present samples.

References (1) Mumpton, F.A. and Majica, L.R. (1999): Proc. Natl. Acad. Sci., Vol.96, pp.3463-70. (2) Barbarick, K.A. and Pirela, H.J. (1984): Agronomic and horticultural uses of zeolites: a review. In: Zeo-agriculture: Use of Natural Zeolites in Agriculture and Aquaculture, Westview Press, Boulder, Colorado, 93103. (3) Lewis, M.D., Moore, F.D. and Goldsberry, K.L. (1984): Ammonium-exchanged clinoptilolite and granulated clinoptilolite

with urea as nitrogen fertilizers. In: Zeo-agriculture: Use of Natural Zeolites in Agriculture and Aquaculture, Westview Press, Boulder, Colorado, 105111. (4) Dwairi, I.M. (1998): Environ. Geol.,Vol.34, pp.1-4. (5) Davidovits, J. (1991): J. Thermal Anal., Vol.37, pp.1633–56. (6) Lü, L. and Lai, M.O. (1998): Mechanical Alloying, Springer publication, 25. (7) Weatherley, L.R. and Miladinovic, N.D. (2004): Water Res., Vol.38, pp.4305–12. (8) Komnitsas, K. and Zaharaki, D. (2007): Miner. Eng. Vol.20, pp.1261-77. (9) Chang, T.W. and Chiu, J.P. (2003): Miner. Eng., Vol.16, pp.205–10. (10) Perera, D.S., Uchida, O., Vance, E.R. and Finnie, K.S. (2007): J. Mater. Sci., Vol.42, pp.3099-106. (11) Silva, P.D., Sagoe-Crenstil, K. and Sirivivatnanon, V. (2007): Cem. Concr. Res., Vol.37, pp. 512-8.


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**

On Fostering the Creative Ability Tadashi Ohyoshi**

Abstract Metaphysical discussions are presented for fostering creative ability of contemporary engineering students.

The most important point is activation of their latent experiences. Possibility of developing their intelligences is dependent on their deduction process from the experiences under repetitive inspiration of group discussion, on the way of thinking, interpretation, modeling, formulation, making a rule in engineering solutions, and communication among students. The fostering the ability is enhanced by the use of the latent experiences addition to the conventional formal active experiences. Besides, the activation is commonly carried out in group helping by facilitators. To yield the intelligences is equivalent to foster the creative ability.

Department of Mechanical Engineering, Faculty of Engineering and Resource Science, Akita University


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42 大好直

#30号-本文.indd 44 10/04/21 9:12

43創造能力の育成について

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44 大好直

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45

*

**

History of the Institute of Mining Geology*

Takahiko Maruyama**

Abstract The Institute of Mining Geology became part of the Department of Geosciences, Mining Engineering and Materials Processing, as a result of faculty reorganization in 1990, and was renamed as the Institute of Applied Earth Sciences. After further reorganization in 1998, the department name was altered to the present-day Department of Earth Science and Technology, Faculty of Engineering and Resource Science, but the Institute of Applied Earth Sciences title was carried over. In the present paper, the author explains the origins of the Institute of Mining Geology and explores its development in the context of the long histories of the Akita Mining College and the Mining College of Akita University.

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Mineral Industry Museum and Professor Emeritus, Akita University.


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Aso, S., Sato, N., Hareyama, T., Yamada, T., Ohguchi, K., and Watanabe, T. (2008) : Wear resistance of high nickel-manganese martensitic cast steel, Proceedings of the Int. Conference Abrasion (Trento, Italy), p.170-84.


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(2008) (D) J91-D 11 2659-72

Ishii, M., Sato, K., Madokoro, H., and Nishida, M. (2008) : Extraction of Subject-Specific Facial Expression

Categories and Generation of Facial Expression Feature Space using Self-Mapping, Journal of Multimedia (JMM) , Vol.3, p.60-7.

(2008)

(C) 128 11 1708-9

Ishii, M., Sato, K., Madokoro, H., and Nishida, M. (2008) : Generation of Emotional Feature Space based on Topological Characteristics of Facial Expression Images, 2008 IEEE Int'l. Conf. on Automatic Face and Gesture Recognition (Amsterdam, the Netherlands) (CD-ROM).

Kageyama, Y., Shoji, Y., and Nishida, M. (2008) : Position Estimation Using Texture Information in NOAA-AVHRR

Data for Geometric Correction, IEEE Inter. Geoscience & Remote Sensing Sympo. 2008 (Boston, U.S.A) (DVD-ROM).

Kageyama, Y., Shibata, C., and Nishida, M. (2008) : Detection of Groundwater Discharge Points in Coastal Regions

around Mt. Chokaisan, Inter. Sympo. on Remote Sensing 2008 (Daejeon, Korea) (CD-ROM).

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p.303-8

Kawakami, H. (2008) : A metric deformation to obtain a positive/negative Gaussian curvature on a disk, Georgian Math. J., Vol.15, p.87-92.

(2008)

MPLS-TE 91 6 645-54

Hashimoto, M., Fukuda, A., and Yukimatsu, K. (2008) : Novel Traffic Engineering Scheme Based upon Application

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Flows for QoS Enhancement, IT-NEWS (QoS-IP)2008 . (Venis), p.167-72. Hashimoto, M., Yukimatsu, K., Miyamura, T., and Shiomoto, K. (2008) : Partial Traffic Engineering for

Guaranteeing Network Quality, APSITT2008 (Maldives), p.48-52. Utsumi, T., Kanno, Y., Konno, S., Sato, A., Yukimatsu, K., Kobayashi, M., and Hashimoto, M. (2008) : Bufferless

Packet Routing Methods for Next Generation Optical Networks, International Conference on Photonics in Switching 2008 (Sapporo, Japan) (CD-ROM).


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Seki, N., Itoi, E., Shibuya, Y., Watanabe, I., Sano, H., Sashi, R., Minagawa, H., Yamamoto, N., Abe, H., Kikuchi, K., Okada, K., and Shimada, Y. (2008) : Mechanical Environment of the Supraspinatus Tendon : Three-Dimensional Finite Element Model Analysis, J. Orthop. Sci., Vol.13, p.348-53.

Muraoka, M., Settsu, N., and Saka, M. (2008) : Residual-Strain-Induced Nanocoils of Metallic Nanowires, J.

Nanosci. Nanotech., Vol.8, p.439-42.

Uegaki,E., and Abe, Y. (2008) : Molecular Resonances in the 28Si + 28Si System, Int. J. Mod. Phys. E, Vol.17, p.2034-9.

Arakawa, R., and Shibuya, Y. (2008) : Flexural Vibration Analysis of Damaged Beams to Estimate Mode Shape and

Detect Damage from Strain Response under Impulse Loads, Proceedings of the Asian Conference on Mechanics of Functional Materials and Structures, (Matsue, Japan), p.249-52.

Shibuya, Y. (2008) : Evaluation of Internal Damping of Polymer Composites with Fiber Debonding by

Homogenization Approach, Proceedings of the Asian Conference on Mechanics of Functional Materials and Structures, (Matsue, Japan), p.285-8.

Tohmyoh, H., Muraoka, M., Sakomizu, K., Takeda, H., and Saka, M. (2008) : Non-Contact Evaluation of Electrical

Conductivity of Thin Metallic Films by Eddy Current Microscopy, Proceedings of the 2008 M&M International Symposium for Young Researchers, p.269-72.

Sugawara, M., Onodera, T., Komatsu, Y., Tago, M., and Beer, H. (2008) : Freezing of water saturated in aluminum wool mats, Heat Mass Transfer, Vol.44, p.835-43.

Sugawara, M., Komatsu, Y., and Beer, H. (2008) : Melting and freezing around a horizontal cylinder placed in a

square cavity, Heat Mass Transfer, Vol.45, p.83-92.

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Hasegawa, H., and Kumagai, S. (2008) : Adaptive Separation Control System Using Vortex Generator Jets for Time-Varying Flow, Journal of Applied Fluid Mechanics, Vol.1, p.9-16.

(2008)

(B) 74 739 601-8

(2008) T , (B) 74 740 795-802

Hasegawa, H., Hayashi, N., and Zhao, Z. (2008) : Suppression Effect of Vortex Generator Jets with Asymmetric

Orifice on Flow Separation, Journal of Fluid Science and Technology, Vol.3, p.775-86. Hasegawa, H., Nagasaka, Y., and Kataoka, H. (2008) : Electrical Potential of Microbubble Generated by Shear Flow

in Pipe with Slits, Fluid Dyn. Res., Vol.40, p.554-64.

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(2008) 36

12 756-65

(2008) (B) 74 745 2063-5

(2008)

(B) 74 748 2598-606 Komatsu, Y., Sugawara, M., Matsukawa, S., and Fujita, T. (2008) : Melting of a Vertical Ice Cylinder Inside a

Rotating Cylindrical Cavity Filled with Binary Aqueous Solution, Heat Transfer Asian Research, Vol.37, p.359-73.

Hasegawa, H., Nakamura, A., and Tanaka, K. (2008) : Unsteady Fluid Forces and Vortical Structure Acting on a Three-Dimensional Airfoil, Proc. of the 12th Asian Congress of Fluid Mechanics, (Daejeon, Korea), 12ACFM (CD-ROM).

Hasegawa, H., Tanaka, K., and Nakamura, A. (2008) : Dynamic Lift Acting on a 3-D Pitching Airfoil and Vortex

Behavior in the Wake, Proc. of the 7th JSME-KSME Thermal and Fluids Engineering Conference, (Hokkaido, Japan) (CD-ROM).

Hasegawa, H., Kataoka, H.,and Asano, K. (2008) : Effect of electrical potential of microbubbles on ozone dissolution,

Proc. of the 6th International Symposium on Measurement Techniques for Multiphase Flows, (Okinawa,


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Japan) (CD-ROM). Adachi, T., Asaji, N., Arima, H., and Ikegami, Y. (2008) : Transitions and Pressure Drop Characteristics of Flow in

Channel with Periodically Trapezoidal Grooved Parts, Proc. of the 13th international Symposium on Flow Visualization, (July 1-4, 2008, Nice, France) (CD-ROM).

Komatsu, Y., Sugawara, M., Abe, T., and Fujita, T. (2008) : Melting of a Rotating Vertical Ice Cylinder into a Binary

Aqueous Solution, The Seventh JSME-KSME Thermal and Fluids Engineering Conference, (Sapporo, Japan), D311 (CD-ROM).

Tanaka, M., Kato, R., Kobayashi, J., and Yoda, R. (2008) : Microstructures and Properties of High-Strength Alloys Severely Deformed by Machining, ISIJ International, Vol.48, p.815-23.

(2008)

9 1 43-50

(2008) 222 97-103

7 8 53-9 Oka, K., Naganawa, A., Yamashita, H., Nakamura, T., and Chiba, T. (2008) : Composite-type Optimal Fiberscope for

Laser Surgery for Twin-to-twin Transfusion Syndrome, Medical Imaging and Augmented Reality, Vol.5128, p.251-9.

(2008)

(C) 74 7442084-6

(2008) MRI

10 4 529-38

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(2008)

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Miyano, Y., Kamiya, O., Fujii, H., and Katada, Y. (2008) : Joint Properties of High Nitrogen-containing Austenitic Stainless Steel Friction Stir Wilds, Proceedings of the 8th International Welding Symposium organized by Japan Welding Society (2008.11.17. Kyoto).

Miyawaki, K., Mori, S., Sakurada, A., Naganawa, A., Kimura, Y., Shibuya, Y., and Obinata, G. (2008) High Precise

Positioning Control for Block Spring Motor, 2008 IEEE International Symposium on Micro-Nano Mechatronics and Human Science, p.441-6.

Miura, K. (2008) : Reflection Response of SH Transient Wave from a Finite Length Crack in Elastic Half-Space, The

8th World Congress on Computation Mechanics (CD-ROM) (Venice, Italy). Miura, K. and Ohyoshi, T. (2008) : Transient Response for an Elastic Wedge Subjected to SH Lateral Impact Load,

The Asian Conference on Mechanics of Functional Materials and Structures ACMFMS2008 (Matsue, Japan).

(2008) LPV (C) 74 741 1303-10

(2008)

( )39 4 61-66

Iwami, T., Miyawaki, K., Sasaki, M., and Shimada, Y. (2008) : Analysis of driving for force in wheelchair propulsion

using the driving force contribution figure, Akita J. Med., Vol.35, p.215-22. Iwami, T., Miyawaki, K., Sasaki, M., and Shimada, Y. (2008) : Bio mechanics measurement of wheelchair

propulsion by a mathematical link model, Akita J. Med., Vol.35, p.223-30.

(2008)27-34

(2008)

41-47 Sasaki, M., Kimura, T., Matsuo, K., Obinata, G., Iwami, T., Miyawaki,K., and Kiguchi, K. (2008) : A wheelchair

simulator for optimal wheelchair design, Journal of Robotics and Mechatronics, Vol.20, p.854-62. Miyawaki, K., Iwami, T., Obinata, G., and Shimada, Y. (2008) : Estimate of Floor Reaction Force vector using


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Foot-Pressure Sensor , Journal of System Design and Dynamics, Vol.2, p.991-95.

(2008)34-40

(2008)

(C) 74 739 746-748

(2008) (C) 74 739 749-51

Matsuoka, T., Sunakoda, K., Hiramoto, K., and Roschke, P. (2008) : Vibration Tests of a Three Story Benchmark Structure with Vibration Control Devices that Generate Power, American Society of Civil Engineers, Structures Congress 2008, No.351 (Vancouver, Canada), 10p (CD-ROM).

Sunakoda, K., Sakurada, A., Naganawa, A., Mori, S., and Shibuya, Y. (2008) : Application of Fractional Calculus

Method to Nano-Motion Actuator, World Congress of Nonlinear Analysts 2008, International Federation of Nonlinear Analysts (Florida, USA).

Matsuoka T., and Sunakoda K. (2008) : Application of Electromagnet Using Magnetization or Demagnetization for

Magnetic Damper, ASME Pressure Vessels & Piping Conference 2008 Seismic Engineering (Chicago, USA), No.61141, p.6 (CD-ROM).

Iwami, T., Sasaki, M., Miyawaki,K., Matsunaga, T., Shimada, Y., and Obinata, G. (2008) : Biomechanical analysis

for FES assisted swing-through gait, 2008 IEEE International Symposium on Micro-Nano Mechatronics and Human Sience (CD-ROM).

Iwami, T., Miyawaki, K., Ishikawa,Y., Matsunaga, T., Shimada, and Y. Obinata, G. (2008) : Model simulation of

novel spine for the motion stress analysis with muscle stimulation, 2008 IEEE International Symposium on Micro-Nano Mechatronics and Human Science (CD-ROM).

Iwami, T., Obinata, G., Miyawaki, K., Miura, H., Matsunaga, T., and Shimada, Y. (2008) : Bilateral Teleoperator

System of Robot with Force Reflection using Functional Electrical Stimulation, Proc of the 13th Annual Conference of the International Functional Electrical Stimulation Society, p.273-75.

Matsunaga, T., Shimada, Y., Misawa, A., Takeshima, M., Tomite, T., Sasaki, K., Sato, M., Chida, S., Hatakeyama, K.,

and Iwami, T. (2008) : Application of accelerometer and gyroscope in FES assisted walking for the correction of drop foot, Proc of the 13th Annual Conference of the International Functional Electrical Stimulation Society, 255.

Chida, S, Matsunaga, T., Misawa, A., Shirahata, T., Takeshima, M., Tomite, T., Sasaki, K., Sato, M., Hatakeyama, K.,

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Iwami, T., and Shimada, Y. (2008) : An Evoluation of Hemiplegic Upper Extremity Coordination by A Robotic Support System to Reconstruct The Reaching Movement Using Functional Electrical Stimulation, Proc of the 13th Annual Conference of the International Functional Electrical Stimulation Society, p.80-82.

Hatakeyama, K., Shimada, Y., Matsunaga, T., Misawa, A., Ohtaka, K., Takeshima, M., Tomite, T., Sasaki, K., Chida,

S., Sato, M., and Iwami, T. (2008) : Evaluation of electrical stimulation of gait and posture in elderly people, Proc of the 13th Annual Conference of the International Functional Electrical Stimulation Society, p.94-96.

Tomite, T., Shimada, Y., Matsunaga, T., Misawa, A., Takeshima, M., Sasaki, K., Sato, M., Chida, S., Hatakeyama, K.,

and Iwami T (2008) : Clinical long-term follow up of FES for correction of foot drop: a case report, Proc of the 13th Annual Conference of the International Functional Electrical Stimulation Society, p.89-90.


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Shigeta, I., Tanuma, Y., Asano, Y., Hiroi, M., and Tanaka, Y., (2008) : Tunneling Study through Analysis of Spatial Variations of the Pair Potential in Diffusive Normal Metal/Insulator/High-Tc Superconductor Junctions, J. Phys. Chem. Solids, Vol.69, p.3042-5.

Tanaka, Y., Golubov, A. A., and Tanuma, Y., (2008) : Odd-frequency Pairing State in Superconducting Junctions, J.

Phys. Chem. Solids, Vol.69, p.3244-6. Saito, H., Mitobe, K., Ito A., Sugawara, Y., Maruyama, K., Minamiya Y., Motoyama, S., Yoshimura, N., and Ogawa,

J. (2008) : Self-regulating Hyperthermia Induced using Thermosensitive Ferromagnetic Material having a Low Curie Temperature, Cancer Sci., Vol.99, p.805-9.

(2008) :

8 1 8-17

(2008)8 1 18-25

Zhang, H., Mitobe, K., and Yoshimura, N. (2008) : Application of Terahertz Imaging to Water Content Measurement,

Jpn. J. Appl. Phys., Vol.47, p.8065-70.

(2008) ” 23 08 59-61 Mitobe, K., et al. (2008) : The Silver Market Phenomenon, Springer, p.371-80.

Suzuki, M., Itoh, A., and Yoshimura, N. (2008) : Three-dimensional Equivalent Circuit Analysis of Water Tree, Proceedings of 2008 international symposium on electrical insulating materials, (Mie, Japan), p.396-9.

Mitobe, K., and Yoshimura, N. (2008) : Noninvasive Temperature Measurement Method for Hyperthermia Treatment

using Ferromagnetic Implant with Low Curie Temperature, The 30th Annual Inter. Conf. of the IEEE EMBS (Vancouver, Canada), p.4384-6.

Rahman Md. M., Mitobe, K., Sato, J., Nikaidou, T., Suzuki, M., and Yoshimura, N. (2008) : Development of

Pianist’s H , and Motion Capture System Using LibertyTM 16 System, Polhemus, The International Conference on Electrical Engineering, ICEE-2008, (Okinawa, Japan), P-027.

Rahman Md. M., Goni, Md. O., Mitobe, K., and Suzuki, M. (2008) : Lightning Surge Impedance Measurement on

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Control Building Using Electromagnetic Transient Program, 5th International Conference Electrical and Computer Engineering, ICECE-2008, (Dhaka, Bangladesh), p.694-8.

Zhang, H., Mitobe, K., and Yoshimura, N. (2008) : THz Imaging for Water Content Measurement, Proceedings of 2008

international symposium on electrical insulating materials, MVP 1-2-1, (Mie, Japan), p.87-90.

Ono, Y., Khalafalla, M., Nishiguchi, K., Takashina, K, Fujiwara, A., Horiguchi, S, Inokawa, H., and Takahashi, Y. (2008) : Charge transport in boron-doped nano MOSFETs: Towards single-dopant electronics, Appl. Surf. Sci., Vol.254, p.6252-6.

Yamaguchi, R., Moriyama, K., and Sato, S. (2008) : Improvement of White Fluorescent Liquid Crystal Display, Mol.

Cryst. Liq. Cryst., Vol.488, p.210-8. Yamaguchi, R., and Sato, S. (2008) : Double-Faced Optical Writing in Guest-Host Mode Liquid Crystal Cell Using

Crosslinkable Polymer Alignment Film, J. Photopolym. Sci. Tec., Vol.21, p.203-6. Kawamura, M., Ye, M., and Sato, S. (2008) : Optical Particle Manipulation Using an LC Device with Eight-divided

Circularly Hole-patterned Electrodes, Opt. Express, Vol.16, p.10059-65. Kawamura, M., Ye, M., and Sato, S. (2008) : Transient Properties of a Liquid Crystal Optical Device with an

Elliptical Intensity Distribution, Jpn. J. Appl. Phys., Vol.47, p.6404-6. Kawamura, M., Ye, M., and Sato, S. (2008) : Laser Manipulator for Rotating Microscopic Trapped Particles by

Using Liquid Crystal Optical Devices, Mol. Cryst. Liq. Cryst., Vol.488, p.238-45. Ye, M., Sakamoto, T., Kawamura, M., Yamaguchi, R., and Sato, S. (2008) : Liquid Crystal Microlens Driven by Two

Voltages, Mol. Cryst. Liq. Cryst., Vol.478, p.31-5. Ye, M., Wang, B., Sato, Y., Kawamura, M., Yamaguchi, R., and Sato, S. (2008) : Transient Properties during

Positive-negative Switching of Liquid Crystal Lens, Mol. Cryst. Liq. Cryst., Vol.478, p.44-8. Wang, B., Ye, M., Kawamura, M., Yamaguchi, R., and Sato, S. (2008) : Numerical and Experimental Studies of

Liquid Crystal Lens with Stacked Structure of Two Liquid Crystal Layers, Mol. Cryst. Liq. Cryst., Vol.478, p.36-43.

Ono, Y., Khalafalla, M., Nishiguchi, K., Takashina, K, Fujiwara, A., Horiguchi, S, Takahashi, Y., and Inokawa, H. (2008) : Single-Dopant Effect in Si MOSFETs (Invited), IEEE Nanotechnology Materials and Devices Conference 2008 (Kyoto, Japan), WeA I-1.


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Yamaguchi, R., Ogura M., and Sato, S. (2008) : Photo-Degradation Properties of Liquid Crystal Cell Using Focused

Blue-Violet Laser Beam, 2008 International Liquid Crystal Conference (Jeju Island, Korea), 2-SUR64, p.393.

Yamaguchi ,R., Sugawara, M., and Sato, S. (2008) : Rewritable Memory Type Polymer Dispersed Liquid Crystal of

Low Driving Voltage, 2008 International Liquid Crystal Conference (Jeju Island, Korea), 1-APP5, p.48. Yamaguchi, R., and Sato, S. (2008) : Numerical Simulation of Micropatterned Twisted Nematic cell - Effect of

Azimuth Anchoring Strength, 2008 International Liquid Crystal Conference (Jeju Island, Korea), 1-APP7, p.50.

Yamaguchi, R., and Sato, S. (2008) : Liquid Crystal Material Dependence on Rubbed PVCi Alignment Properties

(invited paper), The 4th Japanese-Italian Workshop on Liquid Crystals JILC’08 (Nara), p.15. Yamaguchi, R., Ogura M., and Sato, S. (2008) : Photo Degradation Properties in Oriented Liquid Crystal Modes, The

15th International Display Workshops (Niigata, Japan), FMC6-4, p.1661-4. Kawamura, M., Ye, M., and Sato, S. (2008) : Transient Properties of a Liquid Crystal Device with an Anamorphic

Lens Property, 2008 International Liquid Crystal Conference (Jeju Island, Korea), OTH3, p.861. Kawamura, M. (2008) : Optical Trap for Manipulating Plural Particles by Using a Liquid Crystal Device, 2008

International Liquid Crystal Conference (Jeju Island, Korea), OTH5, p.863. Kawamura, M., Baba, M., Kato, D., Yanase, S., and Sato, S. (2008) : Finite-difference time-domain calculation for a

liquid crystal cell with micro-patterned alignment layers, 2008 International Display Research Conference (IDRC '08) (Orlando, Florida, U.S.A.), P17, p.189-92.

Kawamura, M., and Sato, S. (2008) : Liquid Crystal Lens with Divided-circularly Hole-patterned Electrodes, 2008

International Display Research Conference (IDRC '08) (Orlando, Florida, U.S.A.), P18, p.193-6. Kawamura, M., Sano, T., and Sato, S. (2008) : Cell Parameter Measurements of a Liquid Crystal Cell by Using a

Telecentric Lens, 2008 International Display Research Conference (IDRC '08) (Orlando, Florida, U.S.A.), 13.4, p.271-4.

Imano, K., and Kondou, M. (2008) : Possibilities of nondestructive evaluation of a pipe using air-coupled ultrasonic wave in the MHz range, IEICE Electronics Express, Vol.5, p.668-71.

Obara, H. (2008) : Reduced crossbar switch with minimum number of switching cells, Electron. Lett., Vol.44,

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p.888-9. Kayano, Y., Miura, H., Miyanaga, K., and Inoue, H. (2008) : The Relationship between Voltage and Duration of

Short-Time Arc Generated by Slowly Breaking Silver Contact, Transaction of IEICE on Electronics, Vol.E91-C, p.1230-2.

Fukuda, M., and Imano, K. (2008) : A Novel System Using Double-Layered Piezoelectric Transducer for Detecting

Sub-Harmonic Components of Ultrasonic Pulse Waves, Int. J. Soc. Mater. Eng. Resour., Vol.15, p.42-5. Fukuda, M., Nishihira, M., and Imano, K. (2008) : Novel Detection System Using Double-Layered Piezoelectric

Transducer in Same Polarization Direction for Sub-Harmonic Components Generated from Plastic-Deformed Metal Rod, Jpn. J. Appl. Phys., Vol.47, p.3899-903.

Fukuda, M., and Imano, K. (2008) : Detection of sub-harmonic components generated from microbubbles in water

using double-layered piezoelectric transducer with aligning polarization directions, Acoustical Science and Technology, Vol.29, p.399-402.

Fukuda, M., and Imano, K. (2008) : Detection of Harmonic Components Generated from Crept Metal Rod Using a

Double-Layered Piezoelectric Transducer System, Acoustical Imaging Vol.29, Springer Science + Business Media B. V., p.233-8.

(2008)

35 671-80 Yamaya, C., and Inoue, H. (2008) : Availability Applying Temperature Distribution for Estimation of Medium

Constants Using Temperature Rise by Absorption of Ultrasound, Jpn. J. Appl. Phys., Vol.47, p.4145-8. Yamaya, C., and Inoue, H. (2008) : Heated Temperature Imaging by Absorption of Ultrasound, Acoustical Imaging

Vol.29 (Edited by Iwaki Akiyama), Springer Science, p.473-8.

(2008) ( ) TECHNO 204 121-3

(2008) FDTD

SENAC 41 131-44

Inoue, H., Miura, H., Kayano Y., and Miyanaga K. (2008) Current Noise up to GHz B and Generated by Slowly Breaking Silver-Compound Contacts with External DC Magnetic Field, Proceedings of the 24th International Conference on Electrical Contacts (ICEC2008) (Saint-Malo, France), p.329-34.


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Obara, H., Sakata, M., and Nemoto Y. (2008) : Bridging crossbar and triangular switches, Proceedings of the

International Workshop on High Performance and Highly Survivable Routers and Networks, p.31-6. Obara, H., Sakata, M., and Nemoto Y. (2008) : Torus-embedded crossbar switch with a minimum number of

switching cells, Proceedings of the International Workshop on High Performance and Highly Survivable Routers and Networks, p.119-24.

Kayano, Y., and Inoue, H. (2008) : A Study on Effect of Noise Suppression Sheet on EM Radiation from a PCB

Proceedings of the 3rd Pan-Pacific EMC Joint Meeting PPEMC’08 (Musashino, Japan), 15S2-1, p.11-2.

Kayano, Y., and Inoue, H. (2008) : A Study on Electromagnetic Coupling between Transmission Line on Model Chip,

Proceedings of 2008 IEEE EMC Symposium (CD-ROM) (Detroit, USA), THU-AM-2-4. Kayano, Y., Ono, Y., and Inoue, H. (2008) : EM Radiation from a Printed Circuit Board with an Interconnection

Cable Driven by Low-Voltage Differential-Signaling, Proceedings of International Conference on Electronic Packaging (ICEP2008) (Tokyo, Japan), p.144-8.

Miyata, S., Kayano, Y., and Inoue, H. (2008) : EM Radiation through Aperture of Metallic Enclosure with a PCB

inside, 2008 Asia-Pacific Symposium on Electromagnetic Compatibility & 19th International Zurich Symposium on Electromagnetic Compatibility (Singapore), p.670-3.

Miyanaga, K., Kayano, Y., Takagi T. and Inoue, H. (2008) : Connected relation between bridge abd arc and

temperature rise at slowly breaking contacts, Proceedings of the 24th International Conference on Electrical Contacts (ICEC2008) (Saint-Malo, France), p.347-52.

Miyanaga, K., Kayano, Y., and Inoue, H. (2008) : A Measurement on Contact Voltage and Shape of Bridge at Low

Speed Breaking Contacts, Proceedings of 8th International Session on Electro-Mechanical Devices (Sendai, Japan), EMD2008-95, p.121-4.

Hayashi, H., Mizuki, T., Sone, H., Kayano, K., and Inoue, H. (2008) : On Contact Conditions in Connectors to Cause

Common Mode Radiation, Proceedings of 2008 IEEE EMC Symposium (CD-ROM) (Detroit, USA), TUE-AM-5-OF-7.

Marttila, J., Hayashi, Y., Kayano, Y., Sone, H., and Inoue, H. (2008) : Computation of Electromagnetic Field

Distribution in a Cross-Section of Connector with Contact Failure, Proceedings of 8th International Session on Electro-Mechanical Devices (Sendai, Japan), EMD2008-84, p.77-80.

Hanawa, S., Miyanaga, K., Kayano, Y., and Inoue, H. (2008) : A Study on Relationship between Opening Velocity

and Short-Time Arc for Silver Contact, Proceedings of 8th International Session on Electro-Mechanical Devices (Sendai, Japan), EMD2008-95, p.121-4.

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82 研究論文目録（2008）

Tajima K., Sato T., and Sakamoto Y. (2008) : Improvement of the Analytical Model of a Laminated Core Parametric Motor, A, Vol.128-A, p.527-32.

(2008)

49 9 3302-15 Matsuo, K., Miura, T., and Taniguchi, T. (2008) : An Estimator to Characterize Varying Time Delays Based on

Cross-Correlation Function for the Tuning of IP Network-based Small DC Motor Speed Control, IEEJ Transactions on Electrical and Electronic Engineering, Vol.3, p.734-6, John Wiley & Sons.

(2008)

32 3 419-23

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(2008)25 1 101-8

(2008) 2007

119-28 Hamaoka, H., and Shimizu, K. (2008) A STUDY ON THE INTEREST OF CHILDREN IN THE SIDEWALK

AREA, Journal of the Eastern Asia Society for Transportation Studies, Vol.7, p.1692-706.

(2008)25 4 909-17

(2008)

25 4 919-28

Hamaoka, H., Takeuchi, M., Watanabe, N., and Nishida, T. (2008) IMPROVEMENT OF INFORMATION SERVICE SYSTEM OF SLIPPERY ROAD CONDITIONS AND EVALUATION OF IT, Technical Papers of the Conference of Intelligent Transport Systems, Vol.15, No.10271, 9pages (CD-ROM).

Hamaoka, H. (2008) Establishment of Information Service System of Slippery Road Conditions Based on the

Vehicle Behavior, International Workshop on Recent Advances in Transport (Marrakech, Morocco). Hamaoka, H. (2008) A Safety Analysis Based on Driver Decisions when Acquiring Signal Change Information,

Workshop on Transportation Researches for Urban Safety (Bangkok, Thailand).

(2008) CFRP61 478-85

(2008) MMA AFRP

RC 61 517-22

(2008)8

93-8

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Suzuki, T., Kagaya, M., and Takahashi, T. (2008) : Examination on Properties of Road Surface Repair Material of

Cold Hardening Type and Simplified Evaluation Method of Its Hardening Time, International Journal of the Society of Materials Engineering for Resources, Vol.15, No.2, p.30-6.

(2008) 7

71-8

(2008)61 338-43

(2008)

61 638-44

(2008)54A 650-8 (CD-ROM)

(2008) 1/4

7 ( )83-94

(2008)

30 2 217-21 (CD-ROM)

(2008)62 219-23

Gotou H., Daikokuya, M., Chida T., and Usuki S. (2008) Estimation of Shear Modulus by FEM Bending Simulation of Steel-plate-inserted Glulam Wood Beams, WCTE 2008 Conference Proceedings, 10th World Conference on Timber Engineering (Miyazaki, Japan) (CD-ROM).

(2008) ()

(2008) 2008 ( )

(2008)

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3 3 175-86

(2008) (A) 74 747 44-52

(2008)

52 673-8

(2008) (B) 64 3 214-25

(2008) 55 356-60

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55 266-70

(2008) 2007 55361-65

(2008)

55 446-50 Ogino T., Mitachi T., Chan K. H., Oikawa H., and Tshushima M. (2008) : A Method for Received Waveform

Reconstruction Based on Bender Element Test Using Frequency-swept Signal, Soils Found., Vol.48, p.287-95.

Oikawa, H., Ogino, T., Itakiyo H., Ookubo K., Igarashi M., and Tsushima M. (2008) A Simple Method for Estimating the Shear Strength Ratio of Soft Peaty Soils, The Proceedings of The Eighteenth (2008) International Offshore and Polar Engineering Conference (Vancouver, Canada), Vol.2, p.603-6.

Igarashi M., Tsushima M, Oikawa H., and Ogino T. (2008) Shear Characteristics of Peat Consolidated Under Cyclic

Loading, The Proceedings of The Eighteenth (2008) International Offshore and Polar Engineering Conference (Vancouver, Canada), Vol.2, p.762-7.

Takahashi, T., and S. Hasegawa. (2008) Hydraulic Experiment on Tsunami Deposits due to Run-up and Run-down,

6th International Conference on Asian Marine Geology (Kohchi, Japan), O-016 (CD-ROM).

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Takahashi, T., and Koshimura, S. (2008) Tsunami Disaster Assessment in Southeast Asia due to Giant Earthquakes near Japan, AOGS 5th Annual General Meeting (Pusan, Korea), OS18 (CD-ROM).

Takahashi, T. (2008) The Effect of Giant Sanriku Tsunamis in the Southeast Asia and Pacific Countries, Proceedings

of Conference of Marine Problems and Specific Solutions (Maldives), p.99-100. Imai, K., Takahashi, T., and Konuma, T. (2008) Characteristics of Tsunami Propagation on the 2007 Niigata

Cyuetsu-Oki Earthquake, PACON (Hawaii, U.S.A.), CST-2A. Takahashi T., Konuma T., and Kojima S. (2008) Observation and Simulation of Small Earthquake Tsunami in

Okinawa by Using Ocean Radar,American Geophysical Union, AGU Fall Meeting 2008 (San Francisco, U.S.A.), OS43D-1327 (CD-ROM).

Tomita, T., Arikawa, T., Tatsumi, D., Honda, K., Higashino, H., Watanabe, K., Nishimura, Y., Tanioka, Y., Nakamura, Y., Tsuji, Y., Namegaya, Y., Murata, M., Woodward, S., Satake, K., Imamura, F., Matsutomi, H., Fujima, K., Shigihara, Y., Koshimura, S., and Miyagi, Y. (2008) Joint Report for Tsunami Field Survey for the Solomon Islands Earthquake of April 1, 2007 25

21-94

(2008) TSUNAMI ( )

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Ogasawara, M., Akaogi, T., Abe, K., Kato, S., Nakata, S., Shirai, M., Ogasawara, M., Akaogi, T., Abe, K., Kato, S., Nakata, S., and Shirai, M. (2008) : EXAFS and XRD Studies on Nb-Mesostructured Materials Prepared from Layered-Perovskite Type Potassium Niobium Oxyfluoride, Int. J. Soc. Mater. Eng. Resour., Vol.15, p.23-9.

Kato, S., Yoshizawa, T., Kakuta, N., Akiyama, S., Ogasawara, M., Wakabayashi, T., Nakahara, Y., and Nakata, S.

(2008) : Preparation of Apatite-type Silicate Supported Precious Metal Catalysts for Selective Catalytic Reduction of NOx, Res. Chem. Intermed., Vol.34, p.703-8.

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128 12 1797-802

(2008)58 3-13

Shikazono, N., Ogawa, Y., Utada, M., Ishiyama, D., Mizuta, T., Ishikawa, N., and Kubota, Y. (2008) : Geochemical

behavior of rare earth elements in hydrothermally altered rocks of the Kuroko mining area, Japan, J. Geochem. Exploration, Vol.98, p.65-79.

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108 234 31-5 Saito, H., Egawa, G., Ishio, S., and Li, G., Q. (2008) : Magnetic force microscopy imaging of in-plane magnetic field

gradient using transient oscillation , J. Appl. Phys., Vol.103, p.07D921-3. Hayashi, S., Sato, T., Ohya, Y., and Nakagawa, Z. (2008) : Influence of Na2O contamination on changing the

cristobalite phase into amorphous in mullite ceramics with excess silica, J. Ceram. Soc. Japan, Vol.116, p.786-91.

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64 13-20 Yamamoto, O., Ohira, T., Moh, and. J., Fukuda, M., Özkal, B., Sawai, J., and Nakagawa, Z. (2008) : Antibacterial

characteristics of carbon-coated CaCO3/MgO powder led by the Pyrolysis of poly (vinyl alcohol) -dolomite mixture, TANSO, Vol.2008, p.77-81.

Ohira, T., Yamamoto, O., Iida, Y., and Nakagawa, Z. (2008) : Antibacterial activity of ZnO powder with

crystallographic orientation, J. Mater. Sci.: Mater. Med., Vol.19, p.1407-12.

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Ohira, T., Kawamura, M., Iida, Y., Fukuda, M., and Yamamoto, O. (2008) : Influence of the mixing ratio on antibacterial characteristics of MgO-ZnO solid solution in two phase coexistence region, J. Ceram. Soc. Japan, Vol.116, p.1234-7.

Ohira, T., Yamamoto, O., Kawamura, M., Iida, Y., and Nakagawa, Z. (2008) : Antibacterial characteristics of

MgO-ZnO solid solution with different chemical compositions, Trans. Mater. Res. Soc., Vol.33, p.1273-6.

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Satoh, H., Ishiyama, D., and Mizuta, T. (2008) : Origin and transportation process of elements in thermal water of magmatic hydrothermal system – examination on strongly acidic thermal water of Tamagawa Hot Spring, Akita Prefecture, Proceedings of International Meetings of Ore Genesis (Materials of the International Conference), Miass, Russia, p.270-3.

Hirose, K., Ishiyama, D., and Mizuta, T. (2008) : Geology and geochemical characteristics of the kaolinite-bearing

gold rich Nurukawa Kuroko Deposit, Aomori Prefecture, Japan, Proceedings of International Meetings of Ore Genesis (Materials of the international Conference), Miass, Russia, p.324-6.

Ishiyama, D., Miyata, M., Mizuta, T., Satoh, H., Ogasawara, M., and Fukuyama, M. (2008) : Characteristics of fluid

coexisting with granitoids associated with Miocene Fe-Cu-Pb-Zn mineralization of the Chichibu skarn deposit in the active uplifting region of central Japan, Extended Abstracts of PACRIM Congress 2008, Gold Coast, Australia, p.319-25.

Satoh, H., Ishiyama, D., Mizuta, T., Yamamoto, M., and Nakano, T. (2008) : Geochemical characteristics of strongly

acidic thermal water of Tamagawa Hot Spring in Northeast Japan: Implications for source and transportation of rare metals in magmatic hydrothermal to geothermal systems, Extended Abstracts of PACRIM Congress 2008, Gold Coast, Australia, p.439-44.

Sakon, T., Fukuda, T., Nojiri, H., and Kakeshita, T. (2008) : Magnetic-field-induced strain of Fe-based ferromagnetic

shape-memory alloy in a pulsed magnetic field, Magnetic Shape Memory Alloys (edited by E. Quandt, L. Schultz, M. Wuttig, T. Kakeshita, Warrendale, PA), Vol.1050E, BB-05 ,6pages.

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NMCC 14 184-90 Sakon, T., Hiroi, M., Nojima, T., Koyama, K., and Watanabe, K. (2008) : Magnetism in the heusler type alloys

Fe2Mn1-XVXSi, Annual Report of High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, p.66-7.

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90

Myint Soe Application of Remote Sensing and Geographic Information System for Alteration Mineral

Identification, Mineral Potential Mapping and Seismic Hazard Prediction: Case Studies in

Japan, Thailand and Myanmar

Studies of the pollution mechanism of fog and the role of particulate matter (PM) in the

mechanism

Ll0-FePt

Study on water content measurement and imaging of aminoacid in cellulose acetate

electrophoresis by terahertz wave

#30号-本文.indd 92 10/04/21 9:13

91

Geological and geochemical characteristics of the Nevera gold-bearing breccia

pipe in the Mt. Crater gold prospecting area, Papua New Guinea(

)

CO2 CBM

"

"

Geochemical characteristics of Neogene acidic volcanic rocks in Ohdate-Kosaka

tunnel area, Hokuroku Districts, Akita Prefecture, Japan(

)

Chatree Au-Ag

in situ

[6]

Ln2Sn2-xZrxO7(Ln ) NO

K2NbO3F

HSP60

渡邉　一成

#30号-本文.indd 93 10/04/21 9:13

92

GGA DnaK(HSP70)

Pr

LCST

Pb-Ag -PbO2

SrTiO3/TiO2

STM

HSP60

CCT SDR family member 4

B

DNA

PbO2

TiC

Nb Ni-Nb

TiAl Ni

Ni-Al

大瀧　貴子

葛西　健悟

平成20年度修士論文題名リスト

#30号-本文.indd 94 10/04/21 9:13

93

Ni

Al

WC C W2C

WC-SiC-Mo2C

WC-SiC

DMFC Pt

Fe50(Pt1-xRhx)50-SiO2

Ni-Al-Pt

CsGd2F7:Tb3+

NOAA-AVHRR

e-Learning

Pox Diagram

ns-2

SVM

In2/3PS3

NOAA-AVHRR

IP

#30号-本文.indd 95 10/04/21 9:13

94 平成20年度修士論文題名リスト

n-InAs

IP

DC

#30号-本文.indd 96 10/04/21 9:13

95

DC

CdTe

DC

pH

PEFC)

THz

DoS

#30号-本文.indd 97 10/04/21 9:13

96 平成20年度修士論文題名リスト

#30号-本文.indd 98 10/04/21 9:13

EDITORIAL COMMITTEE

Makoto TAGO (Chairperson)

Dept. of Mechanical Engineering

Hirokazu OKAWA Yukihiko INOUEDept. of Earth Science and Technology Dept. of Engineering in Applied Chemistry

Kazuhiko FUJIWARA Yoshiyuki SATODept. of Life Science Dept. of Materials Science and Engineering

Akinori TAKAHASHI Kazutaka MITOBEDept. of Computer Science and Engineering Dept. of Electrical and Electronic Engineering

Hidenobu TOKUSHIGE Satoru YOSHIMURADept. of Civil and Environmental Engineering Center for Geo-Environmental Science

#30号-本文.indd 99 10/04/21 9:13

SCIENTIFIC AND TECHNICAL REPORTS

OF

FACULTY OF ENGINEERING AND RESOURCE SCIENCE, AKITA UNIVERSITY

No. 30

OCTOBER 2009

Contents

Original Papers

A Quantitative Analysis on Stress and Fatigue for VDT Workers Measured by Heart Rate Variability (HRV)

……………………………………………………………………………… Keita TAKAHASHI and Hiroshi INOUE　１

Is Microcredit in Spain a Means or an End? ……………………………………………………………………… Hiromi TSUBOI　９

A Simple Equation for Calculating the Isochrone ………… Masaru IGARASHI, Hiroshi OIKAWA, and Toshihiro OGINO　15

Numerical Analysis of Two-phase Flow with CLSVOF Method ……………………………………………… Takahiro ADACHI　25


…………………………………………………………………………… Vinay Kumar JHA and Shigeo HAYASHI　35

Review

On Fostering the Creative Ability ………………………………………………………………………………Tadashi OHYOSHI　41

History of the Institute of Mining Geology …………………………………………………………… Takahiko MARUYAMA　45

List of Original Papers (2008) …………………………………………………………………………………………………………… 　57

List of Theses of Doctor's Degree (2008) ……………………………………………………………………………………………… 　90

List of Theses of Master's Degree (2008) ……………………………………………………………………………………………… 　91

Faculty of Engineering and Resource Science, Akita University

Akita, Japan

#30号-本文.indd 100 10/04/21 9:13

平成 21 年 10 月 23 日　印刷

平成 21 年 10 月 30 日　発行

　秋田大学工学資源学部〒010-8502 秋田市手形学園町１番１号

電話（018）889-2305（総務係）

印　刷　有限会社　三　浦　印　刷〒010-0925 秋田市旭南三丁目７番５号

電話（018）862-2792

（非　売　品）

編集兼発行者

AB面を通過する流体の移流量を表す概略図．（関連研究報告：足立，pp.25-34）

秋田県産天然ゼオライトから得られたジオポリマーの走査電子顕微鏡写真．(a)ケイ酸ナトリウム溶液を用いなかった場合．(b)ケイ酸ナトリウム溶液を使用し4日間養生した場合．（関連研究報告：Jha,V.K.他，pp.35-40）

鉱専時代の列品室．（鉱業博物館所蔵）（関連解説：丸山，pp.45-55）

秋　田　大　学工学資源学部

研究報告第 30 号



　　第三十号

平成

二十一

年

平成21年10月発行

秋田大学工学資源学部〒010-8502 秋田市手形学園町1-1http://www.eng.akita-u.ac.jp/

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