1. Department of Mechanicalmold Design Engineering, Kongju National University, 1223-24, Cheonan Daero, Seobuk-gu, Cheonan-si, Chungnam, Republic of Korea
2. Division of Mechanical and Automotive Engineering, Kongju National University, 1223-24, Cheonan Daero, Seobuk-gu, Cheonan-si, Chungnam, Republic of Korea