1. Department of Mechanical Engineering, Kunsan National University 54150 Gunsan, Jeollabuk-do, Republic of Korea
2. Faculty of Fisheries and Marine Science, Universitas Brawijaya 65145 Malang, Jawa Timur, Indonesia
3. Department of Mechanical Engineering, Hanyang University 04763 Seoul, Republic of Korea
4. Railroad Accident Research Department, Korea Railroad Research Institute 16105 Uiwang, Republic of Korea