Computer Science Dept, Queens College CUNY, Flushing, NY, 11367, USA. friedman.carol@dmi.columbia.edu|Computer Science Dept, Queens College CUNY, Flushing, NY, 11367, USA. friedman.carol@dmi.columbia.edu|Computer Science Dept, Queens College CUNY, Flushing, NY, 11367, USA. friedman.carol@dmi.columbia.edu|Computer Science Dept, Queens College CUNY, Flushing, NY, 11367, USA. friedman.carol@dmi.columbia.edu|Computer Science Dept, Queens College CUNY, Flushing, NY, 11367, USA. friedman.carol@dmi.columbia.edu