1. Department of Mechanical and Automotive Engineering, Keimyung University, Dalseo-gu, Daegu, Republic of Korea
2. School of Automotive Engineering, Kyungpook National University, Sang-ju, Gyeongsangbuk-do, Republic of Korea
3. Department of Mechanical Engineering, Hanyang University, Sangnok-gu, Ansan Kyeonggi-do, Republic of Korea