1. Multidisciplinary Graduate School Program for Wind Energy, Jeju National University, Jeju-si, Jeju Special Self-Governing Province, South Korea
2. Hanjin Ind. Co., Ltd., Yangsan-si, Gyeongsangnam-do, South Korea
3. Faculty of Wind Energy Engineering Graduate School, Jeju National University, Jeju-si, Jeju Special Self-Governing Province, South Korea