1. School of Mechanical Engineering & Institute of Engineering Design and TechnologyKyungpook National University, Daegu, Korea
2. School of Mechanical EngineeringKyungpook National University, Daegu, Korea
3. Division of Mechanical Engineering YeungJin College, Daegu, Korea
4. Graduate SchoolKyungpook National University, Daegu, Korea
5. Hanwha Corporation Gumi, Korea