1. Dept. of Mechanical and Materials Engineering, Queen’s Univ., 130 Stuart St., Kingston, Ontario, K7L 3N6, Canada.
2. Dept. of Civil and Environmental Engineering, Univ. of Windsor, 401 Sunset Ave., Windsor, Ontario, N9B 3P4, Canada.
3. Dept. of Mechanical Engineering, Univ. of Saskatchewan, 57 Campus Dr., Saskatoon, Saskatchewan, S7N 5A9, Canada.