School of Computer Engineering, Miryang National University Miryang, Kyungnam 627-702, Korea. dohhlee@indiana.edu|School of Computer Engineering, Miryang National University Miryang, Kyungnam 627-702, Korea. dohhlee@indiana.edu|School of Computer Engineering, Miryang National University Miryang, Kyungnam 627-702, Korea. dohhlee@indiana.edu|School of Computer Engineering, Miryang National University Miryang, Kyungnam 627-702, Korea. dohhlee@indiana.edu