1. Advanced Structures and Composite Center, University of Maine; Orono 04469-5793 Maine
2. The Scientific and Technological Research Council of Turkey (TUBITAK), Tunus Cad, Kavaklıdere; Ankara 06100 Turkey
3. Department of Forest Industry Engineering; Faculty of Forestry, University of Bartin; Bartin 74100 Turkey
4. Department of Chemical Engineering; University of Maine; Orono Maine 04469
5. U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road; Vicksburg Mississippi 39180