Cheng-Jen Tang

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Cloud computing clusters distributed computers to provide applications as services and on-demand resources over Internet. From the perspective of average and total energy consumption, such consolidated resource enhances the energy efficiency on both clients and servers. However, cloud computing has a different power consumption pattern from the traditional(More)
In order to detect occurrences of mudslides, a mudslide warning system has to address three major issues: sensor sensitivity, coverage area, and deployment cost. With the emergence of AMI, which is considered as the fundamental step towards Smart Grid, a mudslide warning system is able to utilize AMI communication network to provide a broad coverage at a(More)
This paper presents an energy-aware workload dispatching simulator for heterogeneous clusters. Most clusters in a data center are composed of different kind of machines. Among these machines, the front-end nodes distribute incoming requests to the back-end workers. The main concern in such system traditionally focuses on computation performance, but energy(More)
Cloud computing refers to clusters of distributed computers that provide applications as services and on-demand resources over Internet. Theoretically, such consolidated resource enhances the energy efficiency of both clients and servers. However, this paper presents that cloud computing is a panacea for enhancing energy efficiency only under some certain(More)
Energy conservation is one of the most important issues in wireless communication networks. Many power saving methods have been proposed in the literature. Among them, approaches based on the grid quorum systems are common. In a grid quorum based power saving protocol, the grid size is an important factor to the sleep ratio. A larger grid size implies a(More)
Demand Response (DR) is often regarded as the killer application of the emerging smart grid. The ever-growing Internet population and energy consumption makes data centers auspicious candidates with great potential for DR. Besides commercial data centers and large server farms, small data centers scattered in academic or research environments consume(More)
Taiwan, as indicated by a report, Natural Disaster Hotspots: A Global Risk Analysis, is one of the most dangerous places on earth. Emergency Events Database (EM-DAT) also points out that the frequency of disasters appears to be increasing. An NASA study shows that global warming upwards the formation of high clouds in tropics. This situation brings much(More)
Demand Response (DR) is often regarded as the killer application of the emerging smart grid. Recently, the rapidly growing Internet population aggrandizes the size and the number of data centers. The energy issues of data centers have drawn a lot of attention lately. The programmable workload dispatching and scheduling of modern servers make data centers(More)