1. Samsung Electronics, Suwon, Korea.
2. Department of Mechanical Engineering, Seoul National University, Seoul 08826, Korea.
3. Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Korea.
4. Institute of Engineering Research, Seoul National University, Seoul 08826, Korea.
5. Department of Physical Education, Seoul National University, Seoul 08826, Korea.
6. Institute of Sport Science, Seoul National University, Seoul 08826, Korea.