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As a non-invasive angle closure glaucoma diagnosis procedure, Van Herick's slit-lamp Limbal Anterior Chamber Depth Estimation (LACDE) technique is preferably the current standard screening method preliminarily performed at hospitals and eye clinics. However, accuracy of depth estimation is very much dependent on the slit projection distance from the limbus (LD). This study investigated the relation...
Most Thai text-to-speech systems on personal computers can synthesize sound in real time with acceptable quality. However, when porting the Thai TTS systems to limited-resource systems such as mobile devices, computational time has to be reduced. Hence, the quality of synthesized sound is decreased. Even though Flite_Thai, a unit concatenation synthesizer for Thai, can reduce the computational time...
Knowledge about herbal medicine can be contributed from experts in several cultures. With the conventional techniques, it is hard to find the way which the experts can build a self-sustainable community for exchanging their information. In this paper, the Knowledge Unifying Initiator for Herbal Information (KUIHerb) is used as a platform for building a web community for collecting the intercultural...
Aliases discovered in Thai articles are challenging. We apply a standard vector space model to explore and match aliases with formal names or each others. On first construct a term-by-document matrix (TDM), which contains term frequency of term occurring in document collection assuming that all terms exist in the typed named entity dictionary. Normalization techniques are used instead of standard...
In this paper, we discussed a new scheme of forming and weighing a term called a distance-based bigram. In this scheme, the distance between two words is considered for a new term and a new weighting. This new scheme is applied to the vector formation in the process of the vector space model with other standard term forming schemes: unigram and bigram. The tested domains are English and Thai medical...
Computerized Adaptive Testing (CAT) is a widely used computer based testing that can classify examinees according to their abilities. The question sent to each examinee depends on his/her answers to previous questions. One drawback is that CAT is not suitable for a small examination pool since it may not guarantee to cover all topics. The purpose of this study is to introduce a new adaptive testing...
This paper presents a corpus-based approach for extracting keywords from a text written in a language that has no word boundary. Based on the concept of Thai character cluster, a Thai running text is preliminarily segmented into a sequence of inseparable units, called TCCs. To enable the handling of a large-scaled text, a sorted sistring (or suffix array) is applied to calculate a number of statistics...
Automatic text classification for Web collection is a non- trivial task. Since Thai academic Web pages usually present technical articles. They may have many technical terms both in Thai and English. This paper presents two approaches towards the problem of a large number of unique terms in a Web page: 1) term weighting schemes and 2) schemes using Web link information. We propose an approach using...
Spelling speech recognition can be applied for several purposes including enhancement of speech recognition systems and implementation of name retrieval systems. This paper presents an approach to construct three recognizers for the three commonly-used Thai spelling methods based on hidden Markov models (HMMs). The Thai phonetic characteristics, alphabet system and spelling methods are analyzed. For...
This paper gives a comparative study on multilayer file sharing mechanisms in peer-to-peer (P2P) systems. Based on a well-known P2P system named Gnutella, two system architectures, 1-layer and 2-layer Ngnu architectures are proposed in order to reduce network traffic and to gain better scalability. These architectures can be applied to large-scale systems, such as e-government, e-office and e-library,...
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