Author(s): Shih, WC (Shih, Wen-Chung); Tseng, SS (Tseng, Shian-Shyong)
Title: A Knowledge-based Approach to Retrieving Teaching Materials for Context-aware Learning
Source: EDUCATIONAL TECHNOLOGY & SOCIETY, 12 (1): 82-106 2009 Language: English
Document Type: Proceedings Paper
Author Keywords: Ubiquitous learning; Context-aware learning; SCORM; Information retrieval; Ontology; Knowledge-base
KeyWords Plus: QUERY EXPANSION; MANAGEMENT-SYSTEM; IMPLEMENTATION;
DOCUMENTS; DESIGN; WEB
Abstract: 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.
Addresses: [Tseng, Shian-Shyong] Natl Chiao Tung Univ, Dept Comp Sci, Hsinchu 30010, Taiwan; [Shih, Wen-Chung] Asia Univ, Dept Comp Sci & Informat Engn, Taichung 41354, Taiwan; [Shih, Wen-Chung; Tseng, Shian-Shyong] Asia Univ, Dept Informat Sci & Applicat, Taichung 41354, Taiwan
Reprint Address: Tseng, SS, Natl Chiao Tung Univ, Dept Comp Sci, Hsinchu 30010, Taiwan.
E-mail Address: wjshih@asia.edu.tw; sstseng@cs.nctu.edu.tw
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Publisher: IEEE COMPUTER SOC, LEARNING TECHNOLOGY TASK FORCE
Publisher Address: BAG 11-222, MASSEY UNIVERSITY, PALMERSTON NORTH, NEW ZEALAND
ISSN: 1436-4522
29-char Source Abbrev.: EDUC TECHNOL SOC ISO Source Abbrev.: Educ. Technol. Soc.
Source Item Page Count: 25
Subject Category: Education & Educational Research ISI Document Delivery No.: 419ZR
