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个人简介
I am a Professor of Computer Science at the University of Cambridge Computer Laboratory with interests in operating systems, distributed systems, and networks. This work is done within the Systems Research Group of the Laboratory.
My research interests have been in computer networks and operating systems - particularly in respect of performance guarantees. More recently I have focused on the use of information systems to reduce energy demand. This has resulted in two differnent campaigns.
One is about making energy information more readily available - public availability of raw information and tools that can interpret such information and trying to drive down the cost of fine-grain electricity monitoring. The first is perhaps best seen at the Gates Building energy visualistion (click on the nodes on the tree at the left to get started), the second here. The low cost monitors are now being piloted in the Department of Pathology at Cambridge. The same visualisation tool can be used to look at this information - currently rather nascent - at the Pathology energy page.
The visualisation tool(s) are being worked on and the more important point is that the information used by the tools is publicly available; anyone may develop tools to process the data in better ways. I hope to have animated sankey diagrams later in the year.
The other is a dual realisation that (i) we lack information on occupant behaviour that we might use to contextualise energy use, and (ii) that the way we distribute power for lighting is badly out-of-date. Tbese seemingly disconnected notions jointly give rise to a DC powered lighting and sensor networ. More details to come, but the key ideas are a 24VDC network, battery backed up, easy to integrate renewables (particularly solar), convenient power for processors and sensors (and LEDs), much higher reliability, much more efficient, open platform - not just about lighting, long component lifetime so processor for every light is sensible, drastic reduction in emergency lighting cost, etc. As you can see from the Gates Building energy visualisation, 20% of our electricity use is on lights. We have a single corridor on a DC network with LED lighting that reduces the energy by about a factor of ten. The computer science starts when we begin to gather information from the sensors co-located with the lights. More can be found here.
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David Carruthers,Amy Stidworthy, Daniel Clarke, Jo Dicks,Rod Jones,Ian Leslie, Olalekan A.M. Popoola, Martin Seaton
msra(2003)
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SOSP03: ACM Symposium on Operating Systems Principles
Karlsruhe
Germany
August, 2003pp.13-22, (2003)
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ACM SIGCOMM Computer Communication Reviewno. 4 (1994): 158-167
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