1. School
of Environmental Science and Engineering/Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang 790-784, Republic of Korea
2. Exhaust Emission Engineering Team, Research & Development Division, Power Train R&D Center, Hyundai Motor Company, 772-1 Jangduk-dong, Hwaseong 445-706, Republic of Korea