Brett Isham, Interamerican University, Electrical and Computer Engeering, Baymon, PR, United States, Terence Bullett, U. of Colorado, Boulder, CO, United States, Björn Gustavsson, University of Tromsø, Tromsø, Norway, Vasily Belyey, Private researcher, Oslo, Norway and Francisco Carlos Parra-Rojas, Interamerican University of Puerto Rico, Bayamon, United States