1. Post Doctoral Fellow, School of Engineering and Science, Swinburne Univ. of Technology, John St., Hawthorn, Victoria, Australia 3122.
2. Senior Lecturer, School of Mathematics, Swinburne Univ. of Technology, John St., Hawthorn, Victoria, Australia 3122.
3. AM, Deputy Head, School of Engineering and Science, Swinburne Univ. of Technology, John St., Hawthorn, Victoria, Australia 3122 (corresponding author).