background and objectives: operating room (or) scheduling is key to optimal operating room productivity. the significant uncertainty associated with surgery duration renders scheduling of surgical operation a challenging task. this paper proposes a novel computational stochastic model to optimize scheduling of surgeries with uncertain durations. the model considers various surgical operation co...

We introduce low-overhead power optimization techniques to reduce leakage power in embedded processors. Our techniques improve previous work by a) taking into account idle time distribution for different execution units, and b) using instruction decode and control dependencies to wakeup the gated (but needed) units as soon as possible. We take into account idle time distribution per execution u...

Achieving an energy-efficiency control and simultaneously satisfying a performance guarantee have become critical issues for cloud providers. The existing work is power saving in Virtual Machine the potential performances overheads of server consolidation were evaluated. In this paper, three power-saving policies are implemented in cloud systems to mitigate server idle power. Three power-saving...

For existing sensor systems, the power consumption of radio for idle listening is in the same order with that for transmitting. In order to prolong the lifetime of sensor networks, we propose a reliable and energy-efficient data aggregation scheme (Reed) to reduce idle listening time. In this application scenario, each sensor node periodically detects the environment and is allowed to send one ...

Many sensor network applications feature bursty traffic patterns: after long periods of idle time with almost no network traffic, large amounts of data have to be transmitted reliably and in a timely manner. One example is volcano monitoring [8], where precious high-volume data is generated by rare volcanic eruptions. Unfortunately, existing MAC protocols do not sufficiently support such applic...

Power consumption is rapidly increased in data centers because the number of data center is increased and more the scale of data center become larger. Therefore, it is one of key research items to reduce power consumption in data center. The peak power of a typical server is around 250 watts. When a server is idle, it continues to use around 60% of the power consumed when in use, though vendors...

In this short paper, we would like to call professional community’s attention to a daring idea that is surely unhelpful, but is exciting for programmers and anyway conflicts with the trend of energy consumption in computer systems.

Cosmology is undergoing an explosive period of activity, fueled both by new, accurate astrophysical data and by innovative theoretical developments. Cosmological parameters such as the total density of the Universe and the rate of cosmological expansion are being precisely measured for the first time, and a consistent standard picture of the Universe is beginning to emerge. Recent developments ...