Department of Computer Science, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132, USA. whemurad@sfsu.edu|Department of Computer Science, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132, USA. whemurad@sfsu.edu|Department of Computer Science, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132, USA. whemurad@sfsu.edu