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Rethinking Pervasive Computing An SAIC Company Ravi Jain January 24, 2002 rjain@telcordia.com Copyright © 2002 Telcordia Technologies Inc. All Rights Reserved. This is just the beginning... Source: Rainer Malaka, EML ICDE 2001
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Ravi Jain / 24-Jan-01 / 2 Copyright © 2002 Telcordia Technologies Inc. All Rights Reserved. The Blind Spot of Pervasive Computing Current computing/communications already presents an environmental challenge –Over 315M obsolete computers in the U.S. by 2004, destined for landfills, incinerators, or hazardous waste exports Contain toxic metals (lead, mercury) or compounds with unknown toxicity Waste equipment is growing at 3 times the rate of municipal garbage –Accounts for a significant proportion of U.S. energy consumption Pervasive computing will often use smaller devices, but: Will be far more numerous Low cost encourages rapid replacement Less mature technology becomes obsolete faster Disposable devices will emerge Tend to use batteries Design for ubiquity will cause wide dispersal, making disposal harder Global use will bring impacts to regions where little at present
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Ravi Jain / 24-Jan-01 / 3 Copyright © 2002 Telcordia Technologies Inc. All Rights Reserved. What Computer Science research can do: Examples Reduce Software Sprawl –OS & application software causes needless hardware obsolescence Just-in-time plug-in and configuration of software components Dynamic software discovery, billing, upgrade and disposal Reduce Data Sprawl –Personal MM DBs use non-trivial storage, energy and mindspace Better indexing, retrieval and management techniques -- using not only time and space but energy and administration effort as metrics Self-maintaining and self-destroying data: under user policy control Avoid (inefficient) storage of document versions, email attachments etc. Formal models of energy (Big-oh Joules), Hardware/software codesign, Tools to evaluate total lifecycle costs Context-prediction (not just location-prediction) techniques Rethink: Cycles and Megabytes are cheap, but the environment (and the user) are not
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