Affiliation: | 1. Department of Civil and Construction Engineering, Iowa State University, Ames, IA 50011, USA;2. Future Technology Research Division, Korea Institute of Science and Technology P.O. Box 131 Cheongryang, Seoul, 136-791, Korea;3. School of Environmental Science and Engineering, Inje University, 607 Obang-Dong, Gimhae, Gyeongnam 621-749, Korea (Author for Correspondence, fax: 82-55-334-7092, e-mail: envkwon@ijnc.inje.ac.kr) |