In order to cope with the environmental impacts onBluetooth data transmission diversity techniques wereexamined. A Bluetooth antenna diversity demonstratorwas developed. Extensive experimental investigationsdocumenting the significant improvements of ...

Abstract¿Providing up-to-date input to users' applications is an important data management problem for a distributed computing environment, where each data storage location and intermediate node may have specific data available, storage limitations, ...

Providing differentiated Quality of Service (QoS) over unreliable wireless channels is an important challenge for supporting several future applications. We analyze a model that has been proposed to describe the QoS requirements by four criteria: traffic ...

Wireless sensor networks (WSNs) form a unique class of ad hoc networks consisting of heterogeneous but highly resource-constrained devices that can sense their environment and report sensed data to designated nodes in the network. We present a holistic ...

In this work, we first present an application-initiatedstrategy that aims to control the energy consumption,while simultaneously enhancing the performance of aheterogeneous embedded system. We assess the benefitsof using this strategy by means of a traditional ...

In this talk we study the issue of cross-layer design for rate control in multihop wireless networks. We have developed an optimal cross-layered rate control scheme that jointly computes both the rate allocation and the stabilizing schedule that controls ...

The Convex C220 and C240 supercomputers are a family of 64-bit multiprocessors, tightly coupled through a shared main memory. Each processor contains an integrated vector processor. All processor features, including the vector processor, are controlled ...

Generating pseudo random objects is one of the key issues in computer simulation of complex systems. Most earlier simulation systems include procedures for the generation of independent and identically distributed random variables or some classical random ...

The most important technical challenge for the realization of 4G mobile networks is twofold: (a) to overcome the highly frequency-selective fading channel and (b) to significantly reduce the transmit power from mobile terminals. Recently, it has been ...

In order to create secure and dependable systems and information intelligence, it is a major challenge to determine the security level of the network. This security level depends on a number of dynamically changing factors including emerging of new vulnerabilities ...

The Internet offers a host of high-quality research material in computer science---and, unfortunately, some very low quality resources as well. As part of learning the research process, students should be taught to critically evaluate the quality of ...

Vendors have started releasing the first products certified as complying with the IEEE's fast, long-range mobile WiMax standard. Proponents hope mobile WiMax will compete with cellular, Wi-Fi, and last-mile Internet-access technologies

Proxy caching is a commonly accepted methodology used to reduce Internet traffic, decrease back-end related user delays, and generally improve web performance. Nevertheless, it seems to be inadequate when it comes to caching dynamic web pages, due to ...