Robert Siegel, SC.D. is presently a heat transfer consultant. Prior to this he was a Senior Research Scientist at NASA Lewis Research Center, where he worked on heat transfer research for 44 years. Dr. Siegel is a Fellow of both ASME and AIAA. He has received numerous achievement awards, authored 185 technical papers, and taught graduate level courses as an adjunct professor at three universities John Howell is presently Baker-Hughes Centennial Professor at the University of Texas-Austin. He previously was a heat transfer researcher at the NASA Lewis Research Center, and a professor at the University of Houston. Dr. Howell served as Program Director of the Thermal Transport and Thermal Processing Program with the National Science Foundation from 1994-95, as well as also being a Fellow of ASME and AIAA. He has received numerous achievement awardsSiegel, Robert is the author of 'Thermal Radiation Heat Transfer - Robert Siegel - Hardcover' with ISBN 9780891165064 and ISBN 0891165061.