Department of Computer Science, The University of Texas at San Antonio, San Antonio, TX 78249, USA. mdoderer@cs.utsa.edu|Department of Computer Science, The University of Texas at San Antonio, San Antonio, TX 78249, USA. mdoderer@cs.utsa.edu|Department of Computer Science, The University of Texas at San Antonio, San Antonio, TX 78249, USA. mdoderer@cs.utsa.edu