University of New Mexico, Department of Computer Science, Albuquerque, NM 87131, USA. patrik@cs.umm.edu|University of New Mexico, Department of Computer Science, Albuquerque, NM 87131, USA. patrik@cs.umm.edu|University of New Mexico, Department of Computer Science, Albuquerque, NM 87131, USA. patrik@cs.umm.edu