1. Department of Electronics Engineering, Jeju National University, Jeju-si, Republic of Korea
2. Department of Computer Engineering, Jeju National University, Jeju-si, Republic of Korea
3. School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast, U.K.
4. Department of Biomedical Engineering, College of IT Convergence, Gachon University, Sujeong-gu, Seongnam-si, Republic of Korea