1. Department of Energy Systems Technology, Walla Walla Community College, Walla Walla, Washington, USA
2. Department of Chemical Engineering and Biological Systems Engineering, Washington State University Tri-Cities, Richland, Washington, USA
3. Department of Biological Systems Engineering, Washington State University Pullman, Pullman, Washinghton, USA
4. Department of Education, Washington State University Tri-Cities, Richland, Washington, USA