received her B.S. in mathematics and M.S. in statistics from Stanford in 1975 and her Ph.D. in statistics from Princeton in 1979.

C. (Charles) Michael Lederer is a research chemist and deputy director emeritus of the University of California Energy Institute, where he is responsible for the planning and management of the Energy Institute’s grant programs. For 20 years, he was a lecturer teaching courses in radiation detection and measurement, and chemical methods in nuclear technology in the Department of Chemistry and the Department of Nuclear Engineering at the University of California at Berkeley. Prior to joining the Energy Institute, Dr. Lederer was head of the Information and Data Analysis Department and director of the Isotopes Project at Lawrence Berkeley Laboratory. He is most widely known as co-author of the 6th and 7th editions of the Table of Isotopes, for which he evaluated nuclear structure and decay data for all known nuclides and computerized the Isotopes Project. Dr. Lederer received an A.B. degree in chemistry from Harvard University and a Ph.D. degree in nuclear chemistry from the University of California at Berkeley.

Keith W. Marlow is a nuclear physicist who specializes in the detection and identification of nuclear materials and devices. He has been associated with the Sandia National Laboratories as an employee, consultant and contractor since 1984 and was employed by the US Naval Research Laboratory from 1951 to 1984. He has more than 50 years of experience in detection and analysis of nuclear radiation, beginning with the development of methods of detection for nuclear weapon testing in Nevada and Eniwetok in 1952. Dr. Marlow participated in the design of a nuclear reactor, brought the reactor critical for the first time and used the nuclear reactor to develop techniques in neutron activation analysis, neutron radiography and to produce radioactive nuclides for his basic research. This was followed by a lengthy period of research and development in neutron and gamma-ray sensors and data analysis for the U.S. Navy and other government agencies. The sensors were deployed in various environments, including air, maritime, terrestrial and space. He also contributed to development and techniques for the INF and START treaties to verify treaty compliance, to confirm compliance with potential dismantlement treaties, and to confirm the presence of weapons and weapon components for accountability purposes at the Pantex Plant. He received the E. O. Hulburt Annual Science Award from the Naval Research Laboratory in 1981 and the Intelligence Community Seal Medallion in 2000 from the Director of Central Intelligence. Dr. Marlow received his Ph.D. degree in nuclear physics from the University of Maryland.

John W. Poston, Sr., is a nationally recognized expert in health physics and shielding, occupational dosimetry, and health effects of radiation releases from accidents and terrorist events. He is professor and past chair of the Department of Nuclear Engineering and a consultant at the Veterinary Teaching Hospital at Texas A&M University. His dosimetry research is supported by the Department of Energy’s Office of Nuclear Energy, and he consults with Sandia National Laboratories and a Texas nuclear utility on operational safety issues. He chaired the National Council on Radiation Protection and Measurements committee that produced the 2001 report “Management of Terrorist Events Involving Radioactive Material,” and he served as a peer reviewer for the American Association of Railroads on a risk assessment for rail transport of spent nuclear fuel. He was employed at Oak Ridge National Laboratory from 1964-1977, finishing as head of the Medical Physics and Internal Dosimetry Section of the Health Physics Division. Dr. Poston is president emeritus of the Health Physics Society and is a member of the American Nuclear Society, the National Council on Radiation Protection and Measurements, and Sigma Xi, the Scientific Research Society. He received his B.S. degree in mathematics from Lynchburg College and M.S. and Ph.D. degrees in nuclear engineering from the Georgia Institute of Technology.

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