1. University of Iowa, Iowa City, IA, USA
2. Pennsylvania State University, State College, PA, USA
3. Columbia University, New York, NY, USA
4. University of Southern California, Los Angeles, CA, USA
5. IBM, San Francisco, CA, USA
6. Georgia Institute of Technology, Atlanta, GA, USA
7. Massachusetts Institute of Technology, Boston, MA, USA
8. University of Virginia, Charlottesville, VA, USA