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In this paper, the authors study the power consumption of networked devices in a large Campus network, focusing mainly on PC usage. They first define a methodology to monitor host power state, which they then apply to their Campus network. Results show that typically people refrain from turning off their PC during non-working hours so that more than 1500 PCs are always powered on, causing a large energy waste. They, then design PoliSave, a simple web-based architecture which allows users to schedule power state of their PCs, avoiding the frustration of wasting long power-down and bootstrap times of today PCs.
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