1. Department of Mechanical Engineering, POSTECH, Pohang 790-751, Korea.
2. Division of Mechanical and Automotive Engineering, Wonkwang University, Iksan 570-749, Korea.
3. The 6th R&D Institute-1, Agency for Defense Development, Daejeon 305-152, Korea.
4. Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang 790-751, Republic of Korea.