1. The University of Illinois Urbana-Champaign,The Grainger College of Engineering,Champaign,IL,USA
2. Simmons University,Division of Mathematics, Computing, and Statistics,Boston,MA,USA
3. Appalachian State University,College of Arts and Sciences,Boone,NC,USA
4. DePaul University,Center for Community Research,Chicago,IL,USA
5. DePaul University,College of Computing and Digital Media,Chicago,IL,USA