Gibson Lam

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This paper introduces the Gong system, an Internet-based voice board system designed primarily for language learners which includes special support for Cantonese. The Gong system is a client/server design which may be used to complement or, in some contexts, to replace face to face learning. The system supports Unicode input, storage and display of multiple(More)
The Gong system has been developed for web based communication. It supports synchronous and asynchronous audio communication and can be embedded in other learning management systems. This paper discusses two novel features which are targeted at language learners using the system. The first is the ability to automatically index an audio recording. After the(More)
I n this paper we present a new subdivision scheme that is shown to improve the performance of ray tracing surfaces of revolution over Kajiya ' s classical work [8]. This is based on a monotonic interval partitioning of a generatrix of a surface of revolution. The algorithm has a search complexity upper bound of O (l o g (m n)) f o r m ~ monotonic intervals(More)
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