1. Senior Engineer, Energo Engineering, Inc., KBR Company, 601 Jefferson St., Houston, TX 77002-7900; formerly, Research Scientist, Dept. of Mechanical and Aerospace Engineering, Univ. at Buffalo, State Univ. of New York, Buffalo, NY 14260.
2. Professor, Dept. of Mechanical and Aerospace Engineering, Univ. at Buffalo, State Univ. of New York, Buffalo, NY 14260 (corresponding author).