Alexander L. Kapelevich is a noted expert in the design and manufacture of gears and gearing systems, with over forty years' experince in the field. He received his M.S. degree from the Moscow Aviation Insitute, and his Ph.D. from the Moscow State Technical University. Dr. Kapelevich worked in the Russian aviation industry following his graduation, working in research and development, software development, testing, and failure investigation. He relocated to the United States in 1994, and developed Direct Gear Design@, a well-known design approach, and the subject of his book, Direct Gear Design, first published in 2012 by CRC Press. Currently Dr. Kapelevich works as a gear design consultant for AKGears, LLC. He is a member of AGMA (the American Gear Manufacturers Association).