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This paper designs a holistic global workload management solution which explores diversities of a set of geo-distributed data centers and energy buffering in order to minimize the electricity cost, reduce the peak power drawn from utilities while maintaining the carbon capping requirement of the data centers. The prior work often designed solutions to address each of the aforementioned energy and...
Effective web security practices are key to the success of the Semantic Web. Security measures of authorization, integrity and privacy are to be catered for storage and maintenance of data on the web. Ontology is being highly recommended for security of web services. Many security parameters are being embedded in OWL-S. Security models mapped to ontology seem to be very effective. This paper demonstrates...
Simulating cyber-physical energy systems such as data centers requires the characterization of the energy interactions between the computing units and the physical environment. Such interactions involve discrete events such as changes in operating modes of cooling units, and also transient processes such as heat flow. An event-based simulator fails to capture continuous transient effects while a time-stepped...
Dynamic Application Hosting Management (DAHM) allows clouds to dynamically host applications in data centers at different locations based on: (i) spatio-temporal variation of energy price, (ii) data center computing and cooling energy efficiency, (iii) Virtual Machine (VM) migration cost for the applications, and (iv) any SLA violations due to migration overhead or network delay. DAHM is complementary...
Previous research has demonstrated the potential benefits of thermal aware load placement and thermal mapping in cool-intensive environments such as data centers. However, it has proved difficult to apply existing techniques to live data centers because of models that are either unrealistic, require extensive sensing instrumentation, or because their creation is disruptive to the data center services...
Requiring all the nodes in a large-scale wireless sensor network to communicate their data to their respective destination will deplete the energy of the nodes quickly due to the long-distance and multi-hop nature of the communication and will also results in network contention. Therefore to increase longevity and support scalability, nodes are often grouped into disjoint and mostly non-overlapping...
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