Dr. P. E. Seiden received his A.B. and M.S. in Physics from the University of Chicago in 1954 and 1956, respectively, and his Ph.D. in Physics from Stanford University in 1960. Dr. Seiden was a staff member in the Research Laboratory of the Lockheed Missiles and Space Division from 1956-59 and joined IBM at the Research Center in 1960. He was an NSF Postdoctoral Fellow at the University of Grenoble, France, in 1960, a Visiting Professor at Indiana University in 1967-68, and a Lady Davis Visiting Scientist at the Technion, Haifa, Israel, in 1974-75. Dr. Seiden held a number of research and managerial positions at IBM, including Director of Physical Sciences (1972-76) and Director of General Sciences (1976-77). In recent years, Dr. Seiden was a Research Staff Member Emeritus in the Physical Sciences Department of the IBM Research Center, Yorktown Heights, NY, and a visiting scientist at the Department of Molecular Biology of Princeton University, Princeton, NJ and the Department of Molecular Immunology of the Hospital for Joint Diseases, New York, NY. His research efforts have been in Solid State Physics, Astrophysics and Immunology, ranging over the fields of magnetism, superconductivity, organic metals, structure and evolution of galaxies, solar physics, and modeling the immune system. Dr. Seiden was the creator of "ImmSim", a simulation of the immune system which has been used extensively for both research and teaching. Dr. Seiden passed away on Sunday, April 22nd, 2001. The Theoretical Immunology community mourns this loss. In lieu of flowers, the family is requesting donations may be made:

In memory of Dr. Philip E. Seiden
Memorial SloanKettering Cancer Center
PO Box 750
New York, NY 10131-0304
USA.

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