David W. Yarbrough is Vice President of R&D Services, Inc., a testing and consulting company located in Watertown, TN. He is an Emeritus Professor of Chemical Engineering at Tennessee Technological University and a retired Research Staff Member (part time) at the Oak Ridge National Laboratory. Dave is an ASTM Fellow, a Fellow and Treasurer of the International Thermal Conductivity Conference , and a Fellow and Past-President of the Tennessee Academy of Science. Dave earned a PhD in Chemical Engineering at Georgia Tech.