Clarence "Doc" Green, a retired community college professor with a Ph.D. in physics, is a member of the American Association of Woodturners and his local turning club. He is an active participant in two woodturning forums, "World of Woodturners" and "WoodCentral." Green has been a woodworker for more than 30 years but turning wood only since 2004. In that time, however, he has thoroughly researched the field of woodturning and wood-holding techniques for the lathe. He is the co-author of The Theory and Servicing of AM, FM, and FM Stereo Receivers (Prentice-Hall, 1980) and the author of Technical Physics (Prentice-Hall, 1984).