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    题名: Ranking Metrics and Search Guidance for Learning Object Repository
    作者: Yen, Neil Y.;Shih, Timothy K.;Chao, Louis R.;Jin, Qun
    关键词: CORDRA;LOM;learning object repository;ranking metrics;search guidance;reusability tree;social feedback, information retrieval;distance learning
    日期: 2010-07-23
    上传时间: 2020-02-25 12:10:30 (UTC+8)
    出版者: IEEE
    摘要: In line with the popularity of the Internet and the development of search engine, users request information through web-based services. Although general-purpose searching such as one provided by Google is powerful, searching mechanism for specific purposes could rely on metadata. In distance learning (or e-learning), SCORM provides an efficient metadata definition for learning objects to be searched and shared. To facilitate searching in a federated repository, CORDRA provides a common architecture for discovering and sharing Learning Objects. We followed SCORM and CORDRA specifications to develop a registry system, called the MINE Registry, for storing and sharing 20,738 Learning Objects created in the past five years. As a contribution, we propose the concept of “Reusability Tree” to represent the relationships among relevant Learning Objects and enhance CORDRA. We further collect relevant information, while users are utilizing Learning Objects, such as citations and time period persisted. The feedbacks from the user community are also considered as critical elements for evaluating significance degree of Learning Objects. Through theses factors, we propose a mechanism to weight and rank Learning Objects in the MINE Registry, in addition to other external learning objects repositories. As a practical contribution, we provide a tool called “Search Guider” to assist users in finding relevant information in Learning Objects based on individual requirements.
    關聯: IEEE Transactions on Learning Technologies 3(3), p.250-264
    DOI: 10.1109/TLT.2010.15
    显示于类别:[資訊工程學系暨研究所] 期刊論文

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