1. Department of Electronic and Electrical Engineering, Dankook University, 152, Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do 16890, Korea
2. Daikin korea, 223, Teheran-ro, Gangnam-gu, Seoul 06142, Republic of Korea
3. Daikin industry, 1-1, Nishi-Hitotsuya, Settsu, Osaka 566-8585, Japan