This paper presents an approach to develop high performance scientific computing (HPSC) application for simulation fluid flow pressure in oil reservoir with use of mpiJava. The modeling and developing process adapted the modern Model-Driven Architecture (MDA) technology which was created by Object Management Group. We specially created the HPSC components to model the platform independent model...

The majority of Unmanned Aerial Vehicles (UAVs) in operation today are not truly autonomous, but are instead reliant on a remote human pilot. A high degree of autonomy can provide many advantages in terms of cost, operational resources and safety. However, one of the challenges involved in achieving autonomy is that of replicating the reasoning and decision making capabilities of a human pilot....

In this paper, we propose a new router architecture that supports wormhole switching and circuit switching concurrently. This architecture has been designed to take advantage of temporal communication locality. This can be done by establishing a circuit between nodes that are going to communicate frequently. Messages using those circuits face no contention. By combining circuit switching, pre-e...

Distributed Learning Environments represent the hope that communications and information technology can improve and widen access to education while maintaining and improving its quality. Such environments consist of network applications and services. Good interactive response time is crucial to their success. Slow responses can quickly dissuade teachers and learners alike from investing their t...

Original scientific article High performance routers are fundamental building blocks of the system wide interconnection networks for high performance computing systems. Through collective interaction they provide reliable communication between the computing nodes and manage the communicational dataflow. The development process of specialized router architecture has high complexity and it requir...

Multi-tenant clouds with resource virtualization offer elasticity of resources and elimination of initial cluster setup cost and time for applications. However, poor network performance, performance variation and noisy neighbors are some of the challenges for execution of high performance applications on public clouds. Utilizing these virtualized resources for scientific applications, which hav...

Operating Systems provide services that are accessed by processes via mechanisms that involve a ring transition to transfer control to the kernel where the required function is performed. This has one significant drawback that every service call involves an overhead of a context switch where processor state is saved and a protection domain transfer is performed. However, as we discovered, it is...

Vol. 9 No. 4 1997 49 The PowerStorm 4D40T, 4D50T, and 4D60T midrange graphics adapters from DIGITAL have exceeded the performance of all OpenGL graphics devices costing as much as $25,000. In addition, these products achieved twice the price/performance ratio of competing systems at the time they were announced. The PowerStorm 4DT series of mid-range graphics devices was developed in 1996 to re...

A novel composite architecture consisting of a periodic arrangement of closely-spaced spheres of a stiff material embedded in a soft matrix is proposed for extremely high damping and shock absorption capacity. Efficacy of this architecture is demonstrated by compression loading a composite, where multiple steel balls were stacked upon each other in a polydimethylsiloxane (PDMS) matrix, at a low...

In this article, we present some results on the communication performance of TCP/IP in a cluster of Pentium based workstations connected by a Gigabit Ethernet network. The experiments were performed in order to identify the bottlenecks in the communication protocol stack. We outline our performance measurements and suggest means to improve the overall performance of TCP/IP. Finally, we present ...