Jack Dvorkin received his Ph.D. in Continuum Mechanics in 1980 from Moscow University in the USSR. He has worked in the petroleum industry in the USSR and USA and is currently a Senior Research Scientist with the Stanford Rock Physics Project at Stanford University. Dr Dvorkin has been an invited instructor for numerous industry courses throughout the world, on rock physics and quantitative seismic interpretation. He is a member of American Geophysical Union, Society of Exploration Geophysicists, American Association of Petroleum Geologists, and the Society of Petroleum Engineers.