As the Internet traffic volume increases, the IP over WDM network is expected to be the dominant architecture in future Internet backbone networks. For IP routers to transfer their traffic, the virtual topology should be constructed from lightpaths supplied by WDM networks. To reflect the demand-supply relation of IP and WDM layers, we present the total combined cost as the network design goal ...

Virtual reality has been used in planning and executing various surgical procedures. Technical competence is the bedrock of surgery and virtual reality is the modern tool to assess and improve this competence. These methods are more cost effective and safe. Orthopaedic surgery is based on imaging and hence, can be strongly influenced by the concept of virtual reality. High performance computing...

While current systems mostly neglect the rendering component and provide purely functional graphics and simple virtual environments, we present the concepts of eRobotics and matching system structures to combine complex simulations and realistic virtual environments in a holistic VR simulation system. It focuses on the use of VR technology to optimize and ease the development process and to sig...

We introduce a six layer model of tra c variations and a corresponding model of management actions. In particular, we tra c study real time tra c management on the tra c and session levels which correspond to variations on the hour and minute levels. Using virtual paths (VPs) and virtual channels (VCs) as the managed entities on the two levels respectively, we put forward a simple and robust st...

Virtual prototyping has emerged as a significant enabler for cost effective management of complex products over their lifecycle. The virtual prototypes play an important role through all life-cycle phases of products. Due to the breadth of impact, significant challenges arise in developing virtual prototypes. This paper describes the issues and tradeoffs that are important for implementing virt...

Virtual network mapping considers the problem of fitting multiple virtual networks into one physical network in a cost-optimal way. This problem arises in Future Internet research. One of the core ideas is to utilize different virtual networks to cater to different application classes, each with customized protocols that deliver the required Quality-ofService. In this work we introduce a Greedy...

Virtualization Technology is an interesting research topic in current cloud computing and service. Using the Virtualization Technology in cloud or cluster computing can obtain a lot of benefits, such as ability to deploy any virtual platforms rapidly, easiness to manage all precious resources, and cost reduction. In order to discover optimal performance for virtual platforms, several well-known...

In virtual environment systems, the ultimate goal is delivery of the highest-fidelity user experience possible. This paper describes a general-form framework for optimizing fidelity on a per-task basis. The virtual world database is priority-ordered; the ordering is dynamically recomputed based on display platform, virtual world state, and (possibly shifting) task objectives. Optimization is pe...

Despite many works on collaborative networked organizations (CNOs), CSCW, groupware, workflow systems and social networks, computer support for virtual teams is still insufficient, especially support for agility, i.e. the capability of virtual team members to rapidly and cost efficiently adapt the way they interact to changes. In this paper, requirements for computer support for agile virtual t...

Virtual laboratories are used in online education, corporate training and professional skill development. There are several aspects that determine the value and effectiveness of virtual laboratories, namely (i) the cost of development which includes the cost of creating the virtual environment and designing and implementing the laboratory exercises, (ii) the benefits brought to the trainees com...