1. Department of Physics, University of Colorado Boulder, Boulder, CO 80309, USA
2. American Modeling Teachers Association, Sacramento, CA 95820, USA
3. Department of Computer Science, Brown University, Providence, RI 02912, USA
4. Khoury College of Computer Sciences, Northeastern University, Boston, MA 02115, USA
5. Jacobs School of Engineering, University of California, San Diego, CA 92093, USA