1. Graduate Student, Dept. of Civil Engineering, North Carolina State Univ., Raleigh, NC 27695-8005.
2. Professor, Dept. of Wood and Paper Science, North Carolina State Univ., Raleigh, NC 27695-8005.
3. Senior Research Scientist, CSIRO Manufacturing and Infrastructure Technology, P.O. Box 56, Highett 3190, Australia.
4. Team Leader and Principal Research Scientist, CSIRO Manufacturing and Infrastructure Technology, P.O. Box 56, Highett 3190, Australia;