JESSICA stands for Java-enabled single-system-image computing architecture, a middleware that runs on top of the standard UNIX operating system to support parallel execution of multithreaded Java applications in a cluster of computers. JESSICA hides the physical boundaries between machines and makes the cluster appear as a single computer to applications a single system image. JESSICA supports ...

The “Green Computing,” is especially important and timely. As computing becomes increasingly pervasive, the energy consumption attributable to computing is climbing, despite the clarion call to action to reduce consumption and reverse greenhouse effects. A high performance-computing cluster is a set of computers gathered together and connected with the intent of merging their processing power t...

CEJVM is a cluster enabled Java Virtual Machine, which executes in a distributed fashion among collaborating nodes of a dedicated cluster. It extends Java‘s multithreading mechanism to parallel computing paradigm by transparent migration of independent application threads modeled in master worker paradigm. The goal is to obtain improved performance for computationally-intensive multi-threaded J...

objective: this article presents an application of cluster analysis for social sciences researches especially those studies that have an interview as part of their data collection. this application is more suitable for sequential mixed method researchers who use quantitative data to frame subsequent qualitative subsamples for conducting interviews.  methods: in more detail, the algorithm (i.e.,...

A major issue slowing the development of cluster computers is that programs that efficiently take advantage of them are difficult to write. Cluster programming adds a whole facet to sequential programming; requiring specification of not just when an operation will run, but also where it will be ran. Communications packages such as MPI and PVM explicitly express communications between the nodes ...

Technology is pushing the fastest processors onto single mass-produced chips. Standards are defining a new level of integration: the Pizza Box – a one board computer with memory, disk, baseware, and middleware. These developments fundamentally change the way we will build computers. Future designs must leverage commodity products. Clusters of computers are the natural way to build future mainfr...

computer anxiety as a kind of state anxiety that refer to “the negative emotional and cognitive reactions in some people that occur during work with the computer” and maybe considered as a challenge to their capabilities. in the present study, computer anxiety and positive and negative attitudes to it were examinated among undergraduate students of kangavar payam-e-noor university. this descrip...

Recently several distributed rendering systems have been developed which exploit a cluster of commodity computers by connecting host graphics cards over a fast network to form a compositing pipeline. This paper introduces a new algorithm which takes advantage of the programmable compositing operators in these systems to improve the performance of rendering multiple shadow-maps, for example to p...

Why is heterogenous important? Today, supercomputer is less dominant in high performance computing than before. Clusters become more dominant systems than supercomputer in high performance computing. The reason of this migration is primarily economics. Single high performance supercomputer is even expensive than several inter-connected computers. Although the performance of supercomputers are b...