Department of Computer and Information Science and Engineering, University of Florida, FL 32611, USA. sheikh@cise.ufl.edu|Department of Computer and Information Science and Engineering, University of Florida, FL 32611, USA. sheikh@cise.ufl.edu|Department of Computer and Information Science and Engineering, University of Florida, FL 32611, USA. sheikh@cise.ufl.edu|Department of Computer and Information Science and Engineering, University of Florida, FL 32611, USA. sheikh@cise.ufl.edu