The performance of graphics display of virtual machine improves with the strong support from development of virtualization technology and computer hardware. However, in terms of graphical display mechanism there is a difference between the virtual environment and the traditional environment. So how to measure the performance of graphics display in virtualization environment effectively is espec...

For optimal placement and orchestration of network services, it is crucial that their structure and semantics are specified clearly and comprehensively and are available to an orchestrator. Existing specification approaches are either ambiguous or miss important aspects regarding the behavior of virtual network functions (VNFs) forming a service. We propose to formally and unambiguously specify...

Discrete-time multiserver queues have been successfully used in the performance evaluation of computer and communication systems in various contexts such as TDM, voice-data integration, deflection routing and more recently, ATM-switching technology. In digital communication systems, buffers are used for the temporary storage of digital information awaiting transmission via some communication ch...

Virtualization and partitioning are the means by which multiple application instances can share and run multiple virtual machines supported by a platform. In a Green Cloud environment, the goal is to consolidate multiple applications onto virtual machines associated by fewer servers, and reduce cost and complexity, increase agility, and lower power and cooling costs. To make Cloud center greene...

Over the years, different architectures have been investigated for the design and implementation of high-performance switches. Particular architectures were determined by a number of factors based on performance, flexibility and available technology. Design differences were mainly a variation in the queuing functions and the switch core. The crossbar-based architecture is perhaps the dominant a...

A central problem in ATM switches is the selection of cells to be transmitted on an output line. In general each line has a number of queues, all of which must be handled in a timely manner to provide throughput for each circuit and guarantee its required quality of service. While the problem of the queuing disciplines has been addressed, many of the solutions are computationally complex and ap...

This work modelled a Cloud Computing based Research Collaboration Platform (CRCM) for Engineering and Technology. It features automatic real-time network data acquisition from virtual infrastructures. The platform was designed based on Software as a Service cloud computing model. The integration of the process architecture of the CRCM with the backend server was exploited and the feasibility of...

The aim of the present study was to evaluate the effectiveness of low-budget virtual reality exposure versus exposure in vivo in a within-group design in 10 individuals suffering from acrophobia. Virtual reality exposure was found to be at least as effective as exposure in vivo on anxiety and avoidance as measured with the Acrophobia Questionnaire (AQ), and even more effective on the Attitude t...