1. School of Mechanical and Aerospace Engineering, The Institute of Marine Industry, Gyeongsang National University, Tongyoung, Kyongnam 650-160, Korea
2. Honeywell Engines and Systems, Department 93-31/301-125, P.O. BOX 52181, Phoenix, AZ 85072-2181
3. Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106