The actual gains achieved by replication are a complex function of the number of replicas, the placement of those replicas, the replication protocol, the nature of the transactions performed on the replicas, and the availability and performance characteristics of the machines and networks composing the system. This paper describes the design and implementation of the Replica Management System, ...

In these recent years cloud computing paradigm has achieved widespread adoption. Its success is because of large customers’ ability to use services on demand with a payas-you go pricing model. Low costs and high flexibility make migrating to the cloud computing. Although having advantages, many companies hesitated to move to the cloud mainly because of conflicts related to the service facing th...

BACKGROUND Empiric studies find that contextual factors affect individual weight status over and above individual socioeconomic characteristics. Given increasing levels of obesity, researchers are examining how the food environment contributes to unhealthy weight status. An important change to this environment is the increasing availability of away-from-home eating establishments such as restau...

Service-Orientated Computing (SOC) has become a main trend in software engineering that promotes the construction of applications based on the notion of services. SOC has recently attracted the researchers’ attention and has been adopted industry-wide. However, service composition that enables one to aggregate existing services into a new composite service is still a highly complex and critical...

The provision of end-to-end Quality of Service (QoS) for multimedia services over IP-based networks is already an open issue. To achieve this goal, service providers need to manage Service Level Agreements (SLAs), which specify parameters of the services operation such as availability and performance. Additional mechanisms are needed to quantitatively evaluate the user-level SLA parameters. Thi...

As the demand for high-performance computing (HPC) resources has increased in field of computational science, an inevitable consideration is service availability large cluster systems such as supercomputers. In particular, factor that most affects supercomputing services job scheduler utilized allocating resources. Consequent to submitting user data through analysis, 25.6% jobs failed because p...