This paper proposes a data-model for the standardized representation of both synchronous and asynchronous text-based and other communications. Such communications are widely used in e-learning practice today, and have been studied under the rubrics of "computer conferencing," "Computer-Mediated Communication" (CMC), "Computer Supported Collaborative Learning" (CSCL), and many other names and ti...

Mobile adhoc networks (MANETs) are ideal for situations where a fixed infrastructure is unavailable or infeasible. This limitation makes MANETs unsuitable for applications such as crisis management and battlefield communications. In battlefield team members might need to work in groups or scattered in the terrain. In such terrain, intergroup communication is crucial to the team collaboration. T...

Instant Messaging (IM) is a useful communication and work collaboration tool between individuals, groups, or enterprises. Unfortunately, most IM systems lack the needed security mechanism capable of ensuring the secure communications of IM client-client and IM client-server. In order to find a solution to secure IM communications, we designed and implemented a Secure Instant Messaging and Prese...

The use of information and communications technologies has been identified as one of the means suitable for supplementing the various reforms in convalescing the performance of the justice sector. The Government of Uganda has made strides in the implementation of eGovernment to effectively utilize information and communications technologies in governance. The justice players are manifested in a...

The vitality of the Internet has demonstrated the economic and scientific potential of a world-wide multimedia communications network. When issues such as network bandwidth and real-time sequencing of transmitted data are overcome a new wave of virtual reality (VR) and electronic visualization (EV) applications will soon appear. These technologies have the potential to significantly impact glob...

Most existing communications technologies are either not scalable at all, or scale only under carefully controlled conditions. This threatens an emerging generation of mission-critical but very large computing systems, which will need communication support for such purposes as system management and control, policy administration, data dissemination, and to initiate adaptation in demanding envir...

Medical devices, including surgical staplers, energy-based devices, and access enabling devices, are used routinely today in the majority of surgical procedures. Although these technically advanced devices have proved to be of immense benefit to both surgeons and patients, their rapid development and continuous improvement have had the unintended consequence of creating a knowledge gap for surg...

Capturing design process knowledge is a complex, multi-disciplinary problem. With the advent and increased acceptance of digital computer supported cooperative work tools this project studied how engineering collaboration might be captured and archived to support engineering lifecycle activities. To improve project communications among software engineers and create structured email archives, we...

This paper presents effectiveness of a RF-controlled spatial fading emulator on MIMO performance evaluation in a street microcell environment in comparison with a radio propagation test. The fading emulator can produce a radio propagation environment with a uniform and non-uniform angular power spectra (APS) in the horizontal plane. In this paper, we measured MIMO characteristics of four handse...