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Infrastructure as a Service (IaaS) providers currently have no knowledge of the time frame customers intend to lease resources. However, scheduling in the absence of lease time information leads to wasted resources in times of decreasing demand. We explore how IaaS providers can use lease times to optimize resource allocation. We present two virtual machine scheduling algorithms to optimize the virtual-to-physical...
Agile development methods have gained momentum in the last few years and, as a consequence, test-driven development has become more prevalent in practice. However, test cases are not sufficient for producing dependable software and we rather advocate approaches that emphasize the use of assertions or contracts over that of test cases. Yet, writing self-checks in code has been shown to be difficult...
The SARBAU project is a study on a highly self configuring building automation and control network using IP as field level protocol. UPnP is used for device operation and control. The SARBAU concept covers the use cases initial setup, commissioning, operation, and retrofit. Group address agents are employed to reduce load on the devices and control points for collaborative commands. For evaluation...
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