In this paper we report on efforts to create a virtual environment authoring tool for novices. In particular we set out to eliminate separate design and execute behaviors from these tools. We present two alternative prototypes for achieving this and report on the results of a usability experiments comparing each environment. KeywordsVirtual reality authoring, modes, programming environments.

Building pedagogical applications in virtual worlds is a multi-disciplinary endeavor that involves learning theories, application development framework, and mediated communication theories. This paper presents a project that integrates game-based learning, multi-agent system architecture (MAS), and the theory of Transformed Social Interaction (TSI), The project implements a group of engaging, a...

This paper presents an algorithm of hybrid collision detection. Firstly, the algorithm establishes sphere and OBB level bounding box for every model in virtual scene and then uses intersect test of sphere bounding box to exclude not intersect model. Between two model of maybe the intersection, it uses not intersect part of intersect test excluding model of OBB bounding box, reducing PSO searchi...

In the context of Smart City environments, wireless sensor networking is playing a major role when enabling the utilization of networked infrastructures to introduce or improve a wide variety of services to be available to the citizens. How nodes communicate with each other is a key issue in these types of networks. This work presents a simple but yet efficient network discovery as well as an i...

There has been a transformation from individual work to team work in the last few decades (Ilgen, 1999), and many organizations use teams for many activities done by individuals in the past (Boyett & Conn, 1992 ; Katzenbach & Smith, 1993). In recent years, there has been a renewed interest in computermediated groups because of the increases in globalization of business operations leading to geo...

This paper presents ongoing research aimed at improving surveying education through the use of virtual environments. Teaching surveying presents several challenges such as low student competence in mathematics, geometry and trigonometry, limited student access to instruments, limited availability of terrains on which to practice, dependency on weather conditions, and more. Prior research sugges...

Virtual machine placement to the PMs of the cloud datacenter is one of the important problems in cloud environment to provide better service to the cloud users. This research work proposed techniques to improve the performance of virtual machine placement in cloud environment. The proposed placement algorithm consisted of two main tasks. The first task optimizes the scheduling, while the second...