Department of Computer Science, Université du Québec à Montréal, PO. Box 8888 Downtown Station, Montreal, QC H3C3P8, Canada. diallo.abdoulaye@uqam.ca|Department of Computer Science, Université du Québec à Montréal, PO. Box 8888 Downtown Station, Montreal, QC H3C3P8, Canada. diallo.abdoulaye@uqam.ca|Department of Computer Science, Université du Québec à Montréal, PO. Box 8888 Downtown Station, Montreal, QC H3C3P8, Canada. diallo.abdoulaye@uqam.ca