1. Department of Electrical Engineering, Gyeongsang National University (GNU), Jinju, Republic of Korea
2. Smart Structural Safety and Prognosis Research Division, Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
3. Department of Electronic Engineering, Gyeongsang National University (GNU), Jinju, Republic of Korea
4. Department of Railroad Electrical and Electronic Engineering, Korea National University of Transportation, Uiwang, Republic of Korea