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Parallel efficiency is always a fundamental research field in high performance computing. This paper focuses on parallel computing at high performance computing cluster with CASTEP program, discusses multi-core parallel efficiency in CASTEP, and analyses the influence of the main calculation parameters upon total CPU time and memory usage in case study, such as CPU cores(CPUs), cutoff energy, k-point,...
Certified e-mail protocol is a fair exchange of a message for a receipt between two potentially mistrusting parties over the network. A number of certified e-mail protocols have been studied in recent years. However, most of those protocols employ certificate-based cryptography and full trusted third party, which may not be suitable for wireless networks with limited resources such as power, computation...
The biggest problem to be solved in grid computing is data transmission and communication efficiency and stability. For computing grid composed of small local area network(LAN), this problem can be solved by properly building LAN with the use of IPv4 network or high-speed computing network such as Infiniband. However, when the computing resources are distributed in different physical regions, data...
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