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CyberWalk is a distributed virtual walkthrough system that we have developed. It allows users at different geographical locations to share information and interact within a common virtual environment (<i>VE</i>) via a local network or through the Internet. In this paper, we illustrate that when the number of users exploring the <i>VE</i> increases, the(More)
Although there are a few methods proposed for predicting 3D motion, most of these methods are primarily designed for predicting the motion of specific objects, by assuming certain object motion behaviors. We notice that in desktop distributed 3D applications, such as virtual walkthrough and computer games, the 2D mouse is still the most popular device being(More)
Asthma is the most common chronic disorder of childhood. The aim of this study was to assess prescription trends of asthma medications to provide a measure to evaluate treatment practices and compliance with established international practice guidelines. A retrospective study of data obtained from outpatient prescription databases (2001-2010) of the(More)
A distributed virtual environment (DVE) allows geographically separated users to participate in a shared virtual environment via connected networks. However, when the users are connected by the Internet, bandwidth limitation and network latency may seriously affect the performance and the interactivity of the system. This explains why there are very few DVE(More)
The advance in computer graphics and networking technologies leads to the development of distributed virtual environment (DVE), which allow remote users to share information and interact within a common virtual environment via a local area network or through the Internet. A DVE system needs to perform many tasks, such as processing of clients requests,(More)
CyberWalk is a distributed virtual walkthrough system that we have developed. It allows users at different geographical locations to share information and interact within a shared virtual environment (VE) via a local network or through the Internet. In this paper, we illustrate that as the number of users exploring the VE increases, the server will quickly(More)
A distributed virtual environment (DVE) allows users at different geographical locations to share information and interact within a common virtual environment (VE) via a local network or through the Internet. However, when the number of users exploring the VE increases, the server will quickly become the bottleneck. To enable good performance, we are(More)
BACKGROUND Medical superstitions remain prevalent in today's stressful and technology driven healthcare environment. These irrational beliefs commonly involve night calls, which are periods of volatile workload. In Singapore and Hong Kong, it is commonly held that consumption of steamed buns ("bao") by on-call physicians is associated with increased patient(More)
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