Ken R Pence, Ph.D. is a professor of engineering at Vanderbilt University. He is a retired captain from the Metro Nashville Police Department where he served 31 years (16 on SWAT) and has taught police and military in the US and Europe (England, Germany, France, and Northern Ireland) in confrontation management skills. He has researched sniper shot location for DARPA, acoustic sensors to protect African elephant herds and inexpensive magnetic levitation. He lives in Nashville with his wife and his large - drooling - black lab (Drools Verne). ken.pence@vanderbilt.edu