[Brown CS Talks] Brown CS Seminar: Christine Julien in Lubrano on 3/9/04 at noon

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Subject: [Brown CS Talks] Brown CS Seminar:  Christine Julien in Lubrano on
3/9/04 at noon
Date: Fri, 20 Feb 2004 16:56:11 -0500
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                          Seminar
			
			    BROWN UNIVERSITY
		     Computer Science Department
			
			
			    Christine Julien

			  Washington University


		     Tuesday, March 9, 2004 at noon

	       Lubrano Conference Room (CIT 4th floor)

	       Refreshments will be served at 11:45 am


A Software Engineering Perspective on Context-Awareness in Ad Hoc Mobile
Networks

Ad hoc networks form opportunistically and change rapidly in response
to the movement of mobile hosts. These networks present new software
engineering challenges, especially given the increasing demand for
applications tailored to a wide variety of domains. Applications
executing in ad hoc networks need to react continuously and rapidly to
changes in operating conditions and must adapt their behavior
accordingly. Such applications fall in the category of context-aware
computing, a field that has received much recent attention. Much of
the current work on context-aware computing is limited to presenting
only specific types of context information, e.g., location or time. In
addition, current context-aware systems often rely only on information
directly available to an application via context sensors on the local
host. In this talk, I introduce a novel perspective on
context-awareness in which the context includes, in principle, any
information available in the ad hoc network but is restricted, in
practice, to specific projections of the overall context. I will
present the design and implementation of a new middleware model that
delivers this notion of context to the application
programmer. Specifically, the middleware introduces the ability for
particular tasks to operate over dynamically and declaratively
specified abstract views of the global context. Despite the fact that
interactions among hosts in the underlying network are transient and
disconnections are frequent, the middleware continuously maintains the
desired contextual information. I also present novel network protocols
that provide the context-maintenance required to support the
middleware's implementation. The resulting context-aware middleware
eases the software engineering challenges encountered when programming
applications for ad hoc mobile environments.


		Host: Professor Shriram Krishnamurthi


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