1. School of Mechanical and Aerospace Engineering, Gyeongsang National University, 900 Gajwa-dong, Jinju-City, GyeongNam, 660-701, Korea
2. School of Mechanical and Aerospace Engineering, RRC/Aricraft Parts Technology, Gyeongsang National University, 900 Gajwa-dong, Jinju-City, GyeongNam, 660-701, Korea