Recently the notion of self-similarity has been shown to apply to wide-area and local-area network traffic. In this paper we examine the mechanisms that give rise to self-similar network traffic. We present an explanation for traffic self-similarity by using a particular subset of wide area traffic: traffic due to the World Wide Web (WWW). Using an extensive set of traces of actual user executi...

In a grid computing environment, the network characteristics such as bandwidth and latency affect the task performance. The demands for bandwidth of wide-area networks become large and it reaches more than 100 Gbps. In this article, we focus on parallel routes transmission, such as link aggregation, to realize large bandwidth network. The performance of grid computing with parallel routes trans...

AbstmctHigh-performance wide-area networks are required to interconnect clusters of computers connected by local area and metropolitan area networks. Optical fiber technology provides long distance channels in the multigigabit per second range. The challenge is to provide switching nodes that handle these data rates with minimum delay, and at a reasonable cost. In this paper, we describe a pack...

The main cause of wide-area disruptions in the present power network is due to the relatively long transmission lines between regions, the continuous load growth without a corresponding increase in transmission network capacities. This disturbances have stressed power systems further and forced them operate closer to voltage and angle instabilities. As a result, stability of such power systems ...

Wireless Sensor Networks (WSNs) offer inherent packet redundancy since each point within the network area is covered by more than one sensor node. This phenomenon, which is known as sensors co-coverage, is used in this paper to detect unauthenticated events. Unauthenticated event broadcasting in a WSN imposes network congestion, worsens the packet loss rate, and increases the network energy con...

Future database applications will require database technology advancing to deal with large-scale distributed database systems (LDDBS) which have data distributed over wide area network and involve many sites such as more than a thousand. The goal of our research is to investigate the problems and their solutions for data replication in these LDDBS. When thousands of sites involve in a distribut...

WAMPA (for Wide Area MicroProbe Analyser) represents a new scientific instrument concept for planetary exploration. WAMPA builds on recently published research such as sensor webs and distributed microsensors [1][2] but adds new sensor and localisation concepts. WAMPA is driven by the recurrent theme in spacecraft and sensor design to achieve smaller, lighter and lower cost systems. The essenti...