1. Northwestern University Department of Mechanical Engineering, , 2145 Sheridan Road, Evanston, IL 60208
2. Northwestern University Department of Civil and Environmental Engineering, , 2145 Sheridan Road, Evanston, IL 60208
3. University of Notre Dame Aerospace and Mechanical Engineering, , Notre Dame, IN 46556
4. Northwestern University McCormick Institute Professor and W. P. Murphy Professor of Civil and Mechanical Engineering and Materials Science, , 2145 Sheridan Road, CEE/A135, Evanston, IL 60208