Chih-Cheng Hsu is a PhD candidate in UCLA Computer Science Department. He is in the UCLA KMeD project working on multimedia data modeling, knowledge-based query processing and answering for multimedia data, query optimization of object-oriented multimedia databases, and knowledge discovery on spatial and temporal data. Education 10/1991 - Present; Ph.D candidate in Computer Science Department, University of California, Los Angeles: Major: Database Systems; Minors: Network Modeling, Programming Languages 9/1990 - 8/1991; M.S. in Computer Science, University of New York at Stony Brook, Master Project: A network programming simulator using lightweighted processes 9/1984 - 6/1988; B.S. in Computer Science and Engineering, National Taiwan University, Taipei, Taiwan, Publications An Object-Oriented Data Model for Skeletal Development. R. K. Taira, A. F. Cardenas, W. W. Chu, C. M. Breant, J. D. N. Dionisio, C. Hsu, and I. T. Ieong. In Proceedings of the SPIE, February 1994. An Error-based Conceptual Clustering Method for Providing Approximate Query Answers, W. W. Chu, K. Chiang, C. Hsu, H. Yao, Communication of ACM 1996 A Knowledge-Based Approach for Retrieving Images by Content, C. Hsu, W. W. Chu, R. Taira, IEEE Transactions on Knowledge and Data Engineering, August 1996 Content-Based Image Retrieval Using Metadata and Relaxation Techniques, W. W. Chu, C. Hsu, I. T. Ieong, R. Taira, to appear as a book chapter in "Managing Multimedia Data: Using Metadata to Integrate and Apply Digital Data", edited by Wolfgang Klas and Amit Sheth