of Quantification of Margins and Uncertainty Methodology Applied to the Certification of the Nation’s Nuclear Weapons Stockpile and the Committee on the Internationalization of the Civil Nuclear Fuel Cycle. He is a Fellow of the American Academy of Arts and Sciences, the American Physical Society, the Society for Risk Analysis, and the AAAS. In 1966, Dr. Ahearne earned his Ph.D. in Physics from Princeton University.

Thomas W. Armstrong retired in 2008 from his position as Senior Scientific Associate in the Exposure Sciences Section of ExxonMobil Biomedical Sciences, Inc., where he worked since 1989. Dr. Armstrong also worked with the University of Colorado Health Sciences Center as the lead investigator on exposure assessment for epidemiological investigations of potentially benzene-related or other occupational exposure-related hematopoietic diseases in Shanghai, China. Dr. Armstrong also spent nine years working for the Linde Group, as both the manager of loss control in the gases division and as a manager of safety and industrial hygiene. Dr. Armstrong conducted research on quantitative risk assessment models for inhalation exposure to Legionella, and remains professionally active on that topic. He has recently contributed to publications on mathematical models to estimate exposures to hazardous materials, and methods for exposure reconstruction. He was a member of the Society for Risk Analysis and remains an active member of the American Industrial Hygiene Association. The American Board of Industrial Hygiene certifies him as an Industrial Hygienist. Dr. Armstrong has an M.S. in Environmental Health and a Ph.D. in Environmental Engineering from Drexel University.

Gerardo Chowell is an Assistant Professor at the School of Human Evolution and Social Change at Arizona State University. Prior to joining ASU, Dr. Chowell was a Director’s postdoctoral fellow with the Mathematical Modeling and Analysis group (Theoretical Division) at the Los Alamos National Laboratory. He performs mathematical modeling of emergent and re-emergent infectious diseases (including SARS, influenza, Ebola, and Foot-and-Mouth Disease) with an emphasis in quantifying the effects of public health interventions. His research interests include agent-based modeling, model validation, and social network analysis. Dr. Chowell received his Ph.D. in Biometry from Cornell University and his engineering degree in telematics from the Universidad de Colima, Mexico.

Margaret E. Coleman is a medical microbiologist, risk analyst, and sole proprietor of Coleman Scientific Consulting. She serves as Councilor of Upstate NY Society for Risk Analysis and various leadership roles, including her appointment to the Editorial Board for the journal Risk Analysis. Also an active member of the American Society for Microbiology (ASM), she recently contributed an article to ASM’s Microbe (Microbial Risk Assessment Scenarios, Causality, and Uncertainty). Ms. Coleman contributes to peer review processes for several journals, including SRA’s journal Risk Analysis. She was selected as an expert in European Food Safety Authority database, as an expert reviewer for two NRC Reports (Reopening Public Facilities After a Biological Attack; Evaluation of the Health and Safety Risks of the New USAMRIID High Containment Facilities), and as a committee member on the Review of Testing and Evaluation Methodology for Biological Point Detectors. Ms. Coleman contributed extensively to the published literature on quantitative microbial risk assessment for infectious agents in air, food, and water. She recently developed freelance work on health risks from dermal exposure to Bacillus spores for a new client. Ms. Coleman earned her B.S. degree from SUNY College of

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