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Virtualization has become a popular way to make more efficient use of server resources within both private data centers and public cloud platforms. While recent advances in CPU architectures and new virtualization techniques have reduced the performance cost of using virtualization, overheads still exist, particularly when multiple virtual machines are(More)
A private cloud has become an essential computing infrastructure for many enterprises. However, according to a recent study, 30% of VMs in data centers are not being used for any productive work. These "inactive" (or "zombie") VMs can arise from faulty VM management code within the cloud infrastructure but are usually the result of human neglect. Inactive(More)
Simulating the characteristics of electronic packages like thermal resistance, thermomechanical stress distribution and electromagnetics is important to guide and verify their design. Since packages consist of densely packed components of varied materials and shapes, the simulation time for generating their finite element analysis (FEA) models can span from(More)
In a product design and analysis process, engineers have different usage views towards product information models. The heterogeneous transformation problem has been presented to characterize the resulting gap between design models and analysis models. The multi-representation architecture (MRA) has been developed to realize this transformation through four(More)
feature contained in the idealized model; and 3) an analyzer that transforms idealized model into FEA model with FEA tool specific format. The research status of such a framework indicates the lacking of realization between idealized models and available FEA tools. Also, the authors failed to explain the feature representation method, so it is unclear how(More)
It is commonly agreed that accounts receivable (AR) can be a source of financial difficulty for firms when they are not efficiently managed and are underperforming. Experience across multiple industries shows that effective management of AR and overall financial performance of firms are positively correlated. In this paper we address the problem of reducing(More)
Infrastructure as a Service (IaaS) clouds provide users with the ability to easily and quickly provision servers. A recent study found that one in three data center servers continues to consume resources without producing any useful work. A number of techniques have been proposed to identify such unproductive instances. However, those approaches adopt the(More)
Cloud data centers are difficult to manage because providers have no knowledge of what applications are being run by customers or how they interact. As a consequence, current clouds provide minimal automated management functionality, passing the problem on to users who have access to even fewer tools since they lack insight into the underlying(More)