PYOTR Ya. UFIMTSEV, PhD, D.Sc, has been recognized for his outstanding work in the theory of diffraction and propagation of electromagnetic and acoustic waves. Among his groundbreaking results are the theory of scattering from black bodies, the physical theory of diffraction, and the discovery of new phenomena related to surface waves in absorbing layers. Dr. Ufimtsev has been affiliated with a number of research and academic institutions, including the Institute of Radio-engineering and Electronics of the USSR Academy of Sciences (Moscow), the Moscow Aviation Institute, and most recently, the University of California at Irvine. Among Dr. Ufimtsev's many honors and awards are the USSR State Prize and the Leroy Randle Grumman Medal.