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At Old Dominion University, we have designed and implemented a Java-based distance education system, which we term IRI-h (for Interactive Remote Instruction-heterogeneous). IRI-h is designed to function on a number of heterogeneous platforms, and within heterogeneous network environments. IRI-h builds on the success of its predecessor system IRI, but(More)
We present a preliminary framework for interaction interoperability in Distributed Virtual Environments (DVEs). The goal is to allow each user to use a different input devices and interaction techniques and yet collaborate seamlessly. The framework adopts Service Oriented Architecture (SOA) and use a knowledge base in the form of three ontologies. The(More)
The emergence of XML-based web services as a new software development paradigm increases the expectations of getting better software that address the various collaboration demands over Internet between organizations, or what's termed virtual Organization (VO). The development of appropriate identity management systems between these heterogeneous security(More)
Web-based collaborative virtual environments can be used for education, design, gaming and for commercial applications. From the users' perspective, using mobile devices is preferred because of the ability to move freely rather than being tied to a desktop computer. In this paper, we first present the current state of 3D graphics rendering on mobile devices(More)
Mobile IP presents an efficient solution to the wide-area host mobility problem in the Internet. Nevertheless, its home registration process introduces an overhead in the local-area mobility case. A Mobile Host is required to register with its possibly distant Home Agent, whenever it changes its point of attachment to the network. Foreign Agent hierarchies(More)
In recent years, we have seen the introduction and use of many distance learning systems. Some of these systems are characterized as Interactive which means the dominant mode of instruction is live or synchronous using networked multimedia technology such as audio, video and shared workspaces. In this paper, we present the common features and essential(More)
In recent years, many innovations were introduced to make mobile devices more flexible, effective, functional, and smaller which led to their ubiquity and dependence of users on their availability. Java-based mobile devices have become mainstream appliances, hence Java security has become the center of attention of a lot of researches aimed to investigate(More)