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 KHU‐KIST Convergence Science and Technology Kyung Hee University 23, Kyunghee‐daero, Dongdaemun‐gu Seoul Republic of Korea 02447