Kyoung-Woong Kim, GIST Gwangju Institute of Science and Technology, Gwangju, Korea, Republic of (South), Young-gwang Kim Mr., GIST Gwangju Institute of Science and Technology, Gwangju, South Korea, Myoung-Soo Ko, Kangwon National University, Chuncheon, Korea, Republic of (South) and Young-Gwang Kim