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Cloud computing is growing in adoption for different services previously supported by traditional infrastructure, including dedicated hardware setups. One of these cloud-enabled services is real-time Audio/Video collaboration. Existing cloud-based collaboration systems generally function on a best-effort basis, and offer little to no delivery and quality guarantees. High-quality business-focused solutions...
The prevalent use of multi-component, multi-tenant models for building novel Software-as-a-Service (SaaS) applications has resulted in wide-spread research on automatic scaling of the resultant complex application workflows. In this paper, we propose a holistic solution to Automatic Workflow Scaling under the combined presence of Streaming and Deadline-critical workflows, called AWS-SD. To solve the...
Distributed renewable power generators, such as solar cells and wind turbines are difficult to predict, making the demand-supply problem more complex than in the traditional energy production scenario. They also introduce bidirectional energy flows in the low-voltage power grid, possibly causing voltage violations and grid instabilities. In this article we describe a distributed algorithm for residential...
We evaluate the impact of limitations that may exist in actual implementations of plugin electrical vehicle chargers (e.g. no controllable charging current) on smart charging algo- rithms. We use quadratic programming to control and coordinate the charging of multiple vehicles in order to reduce the peak load and load profile variability observed by a distribution grid transformer. Simulation results...
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