Aaron Beach Mike Gartrell Sirisha Akkala Jack Elston John Kelley Keisuke Nishimoto Baishakhi Ray Sergei Razgulin Karthik Sundaresan Bonnie Surendar Michael Terada Richard Han WhozThat? evolving an ecosystem for context-aware mobile social networks. 50-55 2008 22 IEEE Network 4 http://dx.doi.org/10.1109/MNET.2008.4579771 db/journals/network/network22.html#BeachGAEKNRRSSTH08