Department of Computer and Information Science, Brooklyn College of the City University of New York, Brooklyn, NY, USA. sokol@sci.brooklyn.cuny.edu|Department of Computer and Information Science, Brooklyn College of the City University of New York, Brooklyn, NY, USA. sokol@sci.brooklyn.cuny.edu|Department of Computer and Information Science, Brooklyn College of the City University of New York, Brooklyn, NY, USA. sokol@sci.brooklyn.cuny.edu