Performance Analysis of MAC Protocol for EPON Using OPNET. - Yongseok Chang; Jonghoon Eom; Chang-Gyu Choi; Sung-Ho Kim (Human.Society@Internet 2003, 2003)

Clipart Image Retrieval System Using Shape Information. - Chang-Gyu Choi; Seongil Cheong; Yongseok Chang; Sung-Ho Kim (APWeb, 2004)

Extract Shape from Clipart Image Using Modified Chain Code - Rectangle Representation. - Chang-Gyu Choi; Yongseok Chang; Jung Hyun Cho; Sung-Ho Kim (ICCSA (4), 2004)

Representation of Clipart Image Using Shape and Color with Spatial Relationship. - Jeong-Hyun Cho; Chang-Gyu Choi; Yongseok Chang; Sung-Ho Kim 001 (PCM (1), 2004)