1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1 and Department of Physics, Redeemer University College, Ancaster, Ontario, Canada L9K IJ4
2. Department of Computer Science, Kyoto Sangyo University, Kyoto 603-8555, Japan
3. Department of Physics, Redeemer University College, Ancaster, Ontario, Canada L9K IJ4