[1] School of Textiles, Yeungnam University, Kyongsan 712-749, Korea, Republic of
[2] Sch. of Chem. Eng. and Technology, Yeungnam University, Kyongsan 712-749, Korea, Republic of
[3] Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, Korea, Republic of
[4] Sch. of Mat. Science and Engineering, Seoul National University, Seoul 151-742, Korea, Republic of
[5] Department of Urology, Catholic University of Korea, Seoul 150-713, Korea, Republic of