1. School of Electronics, Electrical Engineering, and Computer Science, Queen's University, Belfast, U.K.
2. Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
3. Department of Electrical and Computer Engineering, Memorial University of Newfoundland, St. John's, NL, Canada
4. School of Energy Engineering, Kyungpook National University, Daegu, South Korea
5. Department of Electrical and Electronics Engineering, Yonsei University, Seoul, South Korea