1. Department of Mechanical and Aerospace Engineering,
The Ohio State University, 201 West 19th Avenue,
Columbus, Ohio 43210, USA
2. Department of Aerospace and Mechanical Engineering and
Department of Civil and Environmental Engineering and Earth Sciences,
University of Notre Dame, Notre Dame, Indiana 46556,
USA
3. Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign, 1206 West
Green Street, Urbana, Illinois 61801, USA