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Cloud Service Providers (CSPs) have been spending a significant portion of their overall operational costs towards their electricity bills, to power up their Internet Data Centers (IDCs). Geographical Load Balancing (GLB) has been shown as an effective energy cost management solution for IDCs. However, due to the constantly changing dynamics of electricity price and cloud workload, an instantly optimal...
Cloud computing has a key requirement for resource configuration in a real-time manner. In such virtualized environments, both virtual machines (VMs) and hosted applications need to be configured on-the-fly to adapt to system dynamics. The interplay between the layers of VMs and applications further complicates the problem of cloud configuration. Independent tuning of each aspect may not lead to optimal...
Many computation-intensive scientific applications feature complex workflows of distributed computing modules with intricate execution dependencies. Such scientific workflows must be mapped and executed in shared environments to support distributed scientific collaborations. We formulate workflow mapping as an optimization problem for latency minimization, whose difficulty essentially arises from...
Cognitive radios (CRs) address the problems of spectrum scarcity and under-utilization of the spectrum. However, realizing a CR network is neither easy nor straight-forward. The link layer in CR ad hoc networks is responsible for choosing suitable channels, out of the available channels, for setting up communication between nodes. However, the selection of channels amongst the CR nodes in the network...
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