1. Research Associate, College of Engineering, Texas A&M Univ.-Kingsville, Kingsville, TX 78363.
2. Professor, Dept. of Mechanical Engineering and Applied Mechanics, Univ. of Rhode Island, Kingston, RI 02881.
3. Visting Professor, Dept. of Mechanical Engineering and Applied Mechanics, Univ. of Rhode Island, Kingston, RI 02881.
4. Professor, Dept. of Mechancial Engineering and Applied Mechanics, Univ. of Rhode Island, Kingston, RI 02881.