Download or read book Public Health Aspects of Galactic Radiation Exposure in Supersonic Transport written by Hermann J. Schaefer and published by . This book was released on 1968 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prospect of large-scale commercial passenger transportation at SST altitudes in the lower stratosphere calls for an accurate assessment of the galactic radiation exposure. Highest radiation levels prevail at high latitudes (polar region) and solar minimum and reach about 1 millirem/hour at 65,000 feet. The accumulated dose of 0.6 rem/year which an SST crew member spending 600 hours/year at altitude would receive exceeds the Maximum Permissible Dose (MPD) for 'Members of the Public' and would classify crew members as 'Radiation Workers' in terms of official recommendations. The assumption of 50 SST each exposing 200 passengers to 1000 hours/year at SST altitude would lead to a population dose about equal to the contribution from industrial radiation workers, with both exposures ranking well below the two largest man-made additions to the natural background, medical use of x-rays and fallout. The heavy flux is attenuated to 3 per cent or less at 65,000 feet, depending on the nuclear species; yet, only 0.1 per cent of this residual flux accounts for maximum ionization hits. That means the microbeam hazard of heavy nuclei is insignificant at SST altitudes. (Author).
Download or read book Public Health Aspects of Galactic Radiation Exposure in Supersonic Transport written by Hermann J. Schaefer and published by . This book was released on 1968 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prospect of large-scale commercial passenger transportation at SST altitudes in the lower stratosphere calls for an accurate assessment of the galactic radiation exposure. Highest radiation levels prevail at high latitudes (polar region) and solar minimum and reach about 1 millirem/hour at 65,000 feet. The accumulated dose of 0.6 rem/year which an SST crew member spending 600 hours/year at altitude would receive exceeds the Maximum Permissible Dose (MPD) for 'Members of the Public' and would classify crew members as 'Radiation Workers' in terms of official recommendations. The assumption of 50 SST each exposing 200 passengers to 1000 hours/year at SST altitude would lead to a population dose about equal to the contribution from industrial radiation workers, with both exposures ranking well below the two largest man-made additions to the natural background, medical use of x-rays and fallout. The heavy flux is attenuated to 3 per cent or less at 65,000 feet, depending on the nuclear species; yet, only 0.1 per cent of this residual flux accounts for maximum ionization hits. That means the microbeam hazard of heavy nuclei is insignificant at SST altitudes. (Author).
Download or read book Occupational and Public Health Aspects of Cosmic Radiation Exposure written by James Morrell Vanderploeg and published by . This book was released on 1980 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Measurements at Supersonic Transport Altitude with Balloon borne Nuclear Emulsions written by Hermann J. Schaefer and published by . This book was released on 1969 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents and discusses the results of measurements with balloon-borne nuclear emulsion packs at supersonic transport altitude. The experimental design was such that the track population in the emulsion reflected directly the flux of low energy protons in the tissue equivalent material surrounding the emulsion on all sides. The radiation packs accompanied a main payload consisting of neutron spectrometer equipment. Packs were flown on a number of flights, each of them sampling a different altitude. No solar activity was recorded during the entire flight time; therefore, the data are representative of galactic radiation at solar maximum for a quiet sun. (Author).
Download or read book Fundamentals for the Assessment of Risks from Environmental Radiation written by Christa Baumstark-Khan and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human health as well as aquatic and terrestrial ecosystems are threatened from increa sing levels of environmental radiation of various sources, many of them of anthropoge nic causality: large areas of the former Soviet Union suffer from radioactive pollution, in particular after the Chemobyl accident; the increase in the incidence of UVB radiati on at the Earth's surface as a result of a progressive depletion of stratospheric ozone is a global problem that requires international concerted actions; in areas of former uranium mining the natural radiation level is substantially increased due to elevated radon levels; a growing portion of the population involved in air traffic is exposed to increased levels of natural radiation; and with the International Space Station an increasing number of astronauts will be exposed to the complex field of cosmic radiation. To estimate the corresponding risks, a better knowledge of the underlying radiobiological mechanisms at the molecular, cellular and system level is required. This book is the result of a multidisciplinary effort to discuss the current state of knowledge of the fundamental processes that result from interactions of environmental radiation -ionizing as well as UV radiation -with living matter and the existing radiati on protection concepts, and then to define future research work needed as fundamental information for the assessment of risks from increased levels of environmental radiation to human health and ecosystem balance. It comprises the key lectures and statements presented at the NATO Advanced Research Workshop.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Current Bibliography of Epidemiology written by and published by . This book was released on 1969 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly, with annual cumulations. Comprehensive, current index to periodical medical literature intended for use of practitioners, investigators, and other workers in community medicine who are concerned with the etiology, prevention, and control of disease. Citations are derived from MEDLARS tapes for Index medicus of corresponding date. Arrangement by 2 sections, i.e., Selected subject headings, and Diseases, organisms, vaccines. No author index.
Download or read book Radiation Exposure of Civil Aircrew written by G. Reitz and published by . This book was released on 1993 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DHEW Publication written by and published by . This book was released on 1972 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1975 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Ionizing Radiation AIR Analysis Results and Lessons Learned From the June 1997 ER 2 Campaign written by J. W. Wilson and published by . This book was released on 2003 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Ionizing Radiation AIR ER 2 Preflight Analysis written by Hsiang Tai and published by . This book was released on 1998 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace Medicine written by and published by . This book was released on 1968 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the National Symposium on Natural and Manmade Radiation in Space written by E. A. Warman and published by . This book was released on 1972 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Evaluation of Exposure Distributions for Air Travelers and Radiation Workers written by Hermann J. Schaefer and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
