School of Computing and Information Technology, Griffith University, Nathan Campus, Australia. t.pham@griffith.edu.au|School of Computing and Information Technology, Griffith University, Nathan Campus, Australia. t.pham@griffith.edu.au|School of Computing and Information Technology, Griffith University, Nathan Campus, Australia. t.pham@griffith.edu.au|School of Computing and Information Technology, Griffith University, Nathan Campus, Australia. t.pham@griffith.edu.au