Institution: | 1. Graduate School, Kyungpook National University, Daegu 702-701, Republic of Korea;2. Daegu-Gyeongbuk Center, Korea Automotive Technology Institute, Daegu 711-892, Republic of Korea;3. POSCO Global R&D Center, Incheon 406-840, Republic of Korea;4. School of Mechanical Engineering, Kyungpooknational University, Daegu 702-701, Republic of Korea |