1. School of Mechanical Engineering, Research Center for Aircraft Parts Technology (ReCAPT); Gyeongsang National University; Jinju 660-701 Korea
2. Composites Research Division, Korea Institute of Materials Science; Changwon 642-832 Korea
3. Pohang Branch Extreme Resources Plant R&D Department, Korea Institute of Geoscience and Mineral Resources; Daejeon 305-350 Korea