1. Assistant Professor Department of Biomedical Engineering, Jungwon University, 85, Munmu-ro, Goesan-gun, Chungbuk, Seoul 110-810, South Korea e-mail:
2. Department of Mechanical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 110-810, South Korea e-mail:
3. Professor Department of Mechanical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 110-810, South Korea e-mail: