This author has not been identified. Look up 'Jinsoo Park' in GoogleThis author has not been identified. Look up 'Dong Hag Choi' in GoogleThis author has not been identified. Look up 'You-Boo Jeon' in GoogleThis author has not been identified. Look up 'Yunyoung Nam' in GoogleThis author has not been identified. Look up 'Min Hong' in GoogleThis author has not been identified. Look up 'Doo-Soon Park' in Google