Scientific and Policy Challenges of Particle Radiations in Medical Therapy and Space Missions; Forty-Seventh Annual Meeting Program, March 7-8, 2011, Hyatt Regency Bethesda, One Bethesda Metro Center, 7400 Wisconsin Avenue, Bethesda, MD 20814

36 pages plus covers. Illustrations. Ink notes on page 36. Tuesday March 8, Program Changes sheet laid in. The Council treats nonionizing radiation as well as ionizing radiation. It has produced more than 150 scientific reports, the major output of the Council. Approximately three to six reports are produced each year, and more than 1.5 million copies of NCRP publications have been distributed. In addition, the annual meeting, open to the scientific community and the public, addresses, each year, a timely scientific issue. The value of this program lies first in the structure of the agenda which gives insight to how the community approached topics of interest and secondly in the abstracts which summarized key topical findings and issues. The National Council on Radiation Protection and Measurements (NCRP), formerly the National Committee on Radiation Protection and Measurements, and before that the Advisory Committee on X-Ray and Radium Protection (ACXRP), is a U.S. organization. It has a congressional charter under Title 36 of the United States Code, but this does not imply any sort of oversight by Congress; NCRP is not a government entity. The Advisory Committee on X-Ray and Radium Protection was established in 1929. Initially, the organization was an informal collective of scientists seeking to proffer accurate information and appropriate recommendations for radiation protection. In 1946, the organization changed its name to the National Committee on Radiation Protection and Measurements.…