1. Department of Mechanical and Automotive Engineering, Kongju National University, 1223-24 Cheonan-daero, Seobuk-gu, Cheonan, Chungcheongnam-do 31080, South Korea
2. Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO), 105 Munji-ro, Yuseong-gu, Daejeon 34056, South Korea
3. Systems Research Lab, Hewlett Packard Laboratory, 1501 Page Mill Rd, Palo Alto, California 94304, United States
4. Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, South Korea
5. Korea Research Institute of Ships & Ocean Engineering, 1312-32 Yuseong-daero, Yuseong-gu, Daejeon 34103, South Korea