*Daeun Lee¹, Hyungmin Park¹ (1. Mechanical Engineering, Seoul National University, Seoul, Korea)

*Abdullah Abbas Kendoush¹, Abdullah Abbas Kendoush (1. Augusta Technical College)

*Jinyong Choi¹, Hyungmin Park^1,2 (1. Dept. of Mechanical Eng., Seoul Nat'l Univ., 2. Inst. of Advanced Machines and Design, Seoul Nat'l Univ.)

*Yasufumi Horimoto¹, Itsuki Mori¹, Yuichi Murai¹, Hyun Jin Park¹, Yuji Tasaka¹ (1. Hokkaido Univ.)