ASIA unversity:Item 310904400/18931
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    题名: A Knowledge-based Approach to Retrieving Teaching Materials for Context-aware Learning
    作者: 時文中;Shih, Wen-Chung;曾憲雄;Tseng, Shian-Shyong;*
    贡献者: 資訊多媒體應用學系
    关键词: Ubiquitous learning, Context-aware learning, SCORM, Information retrieval, Ontology, Knowledge-base
    日期: 2009-01
    上传时间: 2012-11-26 15:10:50 (UTC+8)
    摘要: "With the rapid development of wireless communication and sensor technologies, ubiquitous learning has
    become a promising solution to educational problems. In context-aware ubiquitous learning environments, it is
    required that learning content is retrieved according to environmental contexts, such as learners’ location. Also,
    a learning content retrieval scheme should be able to work with various instructional strategies for different
    learning activities. To solve the context-aware learning content retrieval problem, we propose a strategy-driven
    approach to derive content retrieval strategies from instructional strategies. Moreover, we construct a
    knowledge-based system to expand query keywords based on the derived strategies and then select relevant
    keywords according to geographical distance between entities of concept and learners. This system is composed
    of four components: knowledge transformation, query expansion, content retrieval and user interface. Besides,
    ontology construction algorithms, designed for teachers to easily build up ontology from course outlines, are
    applied to generate the rules of query expansion and the taxonomic index of learning object repository. The
    experimental results indicate that the proposed approach can increase the learning performance of students. "
    显示于类别:[行動商務與多媒體應用學系] 期刊論文


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