This author has not been identified. Look up 'Duck-Ho Bae' in GoogleThis author has not been identified. Look up 'Jin Hyung Kim' in GoogleThis author has not been identified. Look up 'Yong-Yeon Jo' in GoogleThis author has not been identified. Look up 'Sang-Wook Kim' in GoogleThis author has not been identified. Look up 'Hyunok Oh' in GoogleThis author has not been identified. Look up 'Chanik Park' in Google