1. Department of Mechanical Engineering (Integrated Engineering Program) Kyung Hee University 1732, Deogyeong‐daero, Giheung‐gu Yongin‐si Gyeonggi‐do 17104 Republic of Korea
2. Department of Mechanical Engineering BK21 FOUR ERICA‐ACE Center Hanyang University 55 Hanyangdaehak‐ro Sangnok‐gu Ansan 15588 Republic of Korea