1. Faculty of Mechanical and Industrial System Engineering, Kyung Hee University, Yongin, Kyunggi-Do, 449-701, South Korea
2. Korea Textile Inspection and Testing Institute, Yoksam-lDong, Seoul, 135-081, South Korea
3. College of Textiles, North Carolina State University, Raleigh, North Carolina 27695, U.S.A.