is a Materials Research Engineer in the research unit of Engineering Wood Composite at USDA Forest Service, Forest Products Laboratory, Madison, WI. Prior to this, he was an Assistant Professor at Texas A&M University teaching Wood Structural Design and Application of Wood Product. His research interests are mainly in the area of performance and improvement of building wood products. Dr. Cai has also worked on various projects related to nondestructive evaluation of wood products and wood structures since 1990. He has published numerous research papers directly related to NDE of wood products and wood structures.