15
The Context Toolkit Aiding the development of Context-aware Application 2008. 10. 29 CHI’99 Written by Anind K. Dey Summarized by Gihyun Gong
| Date post: | 04-Jan-2016 |
| Category: |
Documents |
| Upload: | randolph-anderson |
| View: | 214 times |
| Download: | 0 times |
The Context Toolkit Aiding the development of Context-aware Application
2008. 10. 29CHI’99
Written by Anind K. Dey
Summarized by Gihyun Gong
Copyright 2008 by CEBT
About paper
Appeared in CHI 1999, conference in Human-Computer Interaction
Written by Anind K. Dey, Assistant Professor in the Hu-man-Computer Interaction (HCI) Institute of Carnegie Mellon
Context defined by Dey :
Any information that can be used to characterize the sit-uation of entities that are considered relevant to the in-teraction between a user and an application, including the user and the application themselves
Provides their context-toolkit : http://www.cc.gatech.edu/fce/contexttoolkit/#samplewidget
Copyright 2008 by CEBT
Motivation
Current State of Context-aware (1999)
Lack of uniform support for building and executing applica-tion
– Ad-hoc manner
– Heavily influenced by the underlying technology
Lack of generality
– Requiring each new application to be built from the ground up
We need architectural support that provides the general mechanisms required by context
The goal of this research is to provide a toolkit that makes it easier for application developers to use context
Copyright 2008 by CEBT
Requirements of toolkit
Separation of concerns
Context interpretation
Distributed communications
Constant availability of context acquisition
Context history storage
Resource discovery
Copyright 2008 by CEBT
Context Toolkit
Built in Java, released Java Library
Three main component
Widgets
– Mediate between a user and an application
Aggregators
– Widgets + aggregate context of real world
Interpreters
– Abstract or interpret low-level context into high level
– For example, identity, location, sound level information could be used to interpret that a meeting is taking place.
Copyright 2008 by CEBT
Context Toolkit
Built in Java, released Java Library
Three main component
Widgets
– Mediate between a user and an application
Aggregators
– Widgets + aggregate context of real world
Interpreters
– Abstract or interpret low-level context into high level
– For example, identity, location, sound level information could be used to interpret that a meeting is taking place.
Copyright 2008 by CEBT
Context Toolkit – Widgets
IdentityPresence Widget
Copyright 2008 by CEBT
Context Toolkit – Widgets
Activity Widget
Copyright 2008 by CEBT
Context Toolkit – Widgets
NamePresence
User’s actual name
PhoneUse
Using phone, length of use
MachineUse
Logon/off , Session
GroupURLPresence
Person’s research group information
Copyright 2008 by CEBT
Sample configuration of context com-ponents
Copyright 2008 by CEBT
Scenario 1
In/Out board
Indicates which members of theoffice are currently in the building
Catch events that entrance ofpeople
Used Context Information
Person’s identity
Time
Copyright 2008 by CEBT
Scenario 2
Information display
Displays information relevant to the user’s location, iden-tity.
Personalized Display
Used context information– Location of the display
– Identity of the user
– Research group and user belonging
Copyright 2008 by CEBT
Scenario 3
DUMMBO Meeting board
Instrumented digitizing whiteboard
Supports the capture and access of informaland spontaneous meetings
Used Context Information
Participant’s Identities
Time when they arrived, left
Location of the board
Copyright 2008 by CEBT
Future research
Resource Discovery
Deal with uncertain or ambiguous context data
Controller for personal/private context data
Copyright 2008 by CEBT
Discussion
Contribution
Try solve lack of generality problem
Suggest general components of context-aware system
Working Java API
However, scenarios are toy level even though it is writ-ten in 1999
Why this widgets are not widely used today?
Also, why the develop of this toolkit is stopped?
A complete Framework such as SOUPA is better than this Toolkit?
