1. Postdoctoral Research Associate, Cooperative Institute for Mesoscale Meteorological Studies and NOAA National Severe Storm Laboratory, National Weather Center, 120 David L. Boren Blvd. #3222, Norman, OK 73072.
2. Assistant Professor, Dept. of Industrial Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.
3. Assistant Professor, College of Business Management, Hongik Univ., Sejong 30016, Republic of Korea (corresponding author).