Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Animal Studies Of Life Shortening And Cancer Risk From Space Radiation
Download Animal Studies Of Life Shortening And Cancer Risk From Space Radiation full books in PDF, epub, and Kindle. Read online Animal Studies Of Life Shortening And Cancer Risk From Space Radiation ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Animal Studies of Life Shortening and Cancer Risk from Space Radiation by : D. H. Wood
Download or read book Animal Studies of Life Shortening and Cancer Risk from Space Radiation written by D. H. Wood and published by . This book was released on 1986 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Air Force study of the delayed effects of single, total body exposures to simulated space radiation in rhesus monkeys is now in its 21st year. Observations on 301 irradiated and 57 age-matched control animals indicate that life expectancy loss from exposure to protons in the energy range encountered in the Van Allen belts and solar proton events can be expressed as a logarithmic function of the dose. The primary causes of life shortening are cancer and endometriosis (an abnormal proliferation of the lining of the uterus in females). Life shortening estimates permit comparison of the risk associated with space radiation exposures to be compared with that of other occupational and environmental hazards, thereby facilitating risk/benefit decisions in the planning and operational phases of manned space missions. Calculations of the relative risk of fatal cancers in the irradiated subjects reveal that the total body surface dose required to double the risk of death from cancer over a 20-year post exposure period varies with the linear energy transfer (LET) of the radiation. The ability to determine the integrated dose and LET spectrum in space radiation exposures of humans is, therefore, critical to the assessment of life time cancer risk.
Book Synopsis Radiation Health Research, 1986-1990 by :
Download or read book Radiation Health Research, 1986-1990 written by and published by . This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report consists of a collection of 225 abstracts of radiation research sponsored by NASA during the period 1986-1990. Each abstract has been categorized within one of four discipline areas: Physics, Biology, Risk Assessment and Microgravity. Topic areas within each discipline have been assigned as follows: Physics--Atomic Physics, Nuclear Science, Space Radiation, Radiation Transport and Shielding and Instrumentation: Biology--Molecular Biology, Cellular Radiation Biology, Tissue, Organs and Organisms, Radioprotectants and Plants: Risk Assessment--Radiation Health and Epidemiology, Space Flight Radiation Health Physics, Inter- and Intraspecies Extrapolation and Radiation Limits and Standards; and Microgravity. When applicable subareas have been assigned for selected topic areas. Keywords and author indices are provided.
Book Synopsis Health Effects of Exposure to Low Levels of Ionizing Radiation by : National Research Council
Download or read book Health Effects of Exposure to Low Levels of Ionizing Radiation written by National Research Council and published by National Academies. This book was released on 1990-02-01 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reevaluates the health risks of ionizing radiation in light of data that have become available since the 1980 report on this subject was published. The data include new, much more reliable dose estimates for the A-bomb survivors, the results of an additional 14 years of follow-up of the survivors for cancer mortality, recent results of follow-up studies of persons irradiated for medical purposes, and results of relevant experiments with laboratory animals and cultured cells. It analyzes the data in terms of risk estimates for specific organs in relation to dose and time after exposure, and compares radiation effects between Japanese and Western populations.
Author :Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation Publisher :National Academies Press ISBN 13 :0309133343 Total Pages :422 pages Book Rating :4.3/5 (91 download)
Book Synopsis Health Risks from Exposure to Low Levels of Ionizing Radiation by : Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation
Download or read book Health Risks from Exposure to Low Levels of Ionizing Radiation written by Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation and published by National Academies Press. This book was released on 2006-03-23 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the seventh in a series of titles from the National Research Council that addresses the effects of exposure to low dose LET (Linear Energy Transfer) ionizing radiation and human health. Updating information previously presented in the 1990 publication, Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR V, this book draws upon new data in both epidemiologic and experimental research. Ionizing radiation arises from both natural and man-made sources and at very high doses can produce damaging effects in human tissue that can be evident within days after exposure. However, it is the low-dose exposures that are the focus of this book. So-called “late” effects, such as cancer, are produced many years after the initial exposure. This book is among the first of its kind to include detailed risk estimates for cancer incidence in addition to cancer mortality. BEIR VII offers a full review of the available biological, biophysical, and epidemiological literature since the last BEIR report on the subject and develops the most up-to-date and comprehensive risk estimates for cancer and other health effects from exposure to low-level ionizing radiation.
Book Synopsis Recapturing a Future for Space Exploration by : National Research Council
Download or read book Recapturing a Future for Space Exploration written by National Research Council and published by National Academies Press. This book was released on 2012-01-30 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than four decades have passed since a human first set foot on the Moon. Great strides have been made in our understanding of what is required to support an enduring human presence in space, as evidenced by progressively more advanced orbiting human outposts, culminating in the current International Space Station (ISS). However, of the more than 500 humans who have so far ventured into space, most have gone only as far as near-Earth orbit, and none have traveled beyond the orbit of the Moon. Achieving humans' further progress into the solar system had proved far more difficult than imagined in the heady days of the Apollo missions, but the potential rewards remain substantial. During its more than 50-year history, NASA's success in human space exploration has depended on the agency's ability to effectively address a wide range of biomedical, engineering, physical science, and related obstacles-an achievement made possible by NASA's strong and productive commitments to life and physical sciences research for human space exploration, and by its use of human space exploration infrastructures for scientific discovery. The Committee for the Decadal Survey of Biological and Physical Sciences acknowledges the many achievements of NASA, which are all the more remarkable given budgetary challenges and changing directions within the agency. In the past decade, however, a consequence of those challenges has been a life and physical sciences research program that was dramatically reduced in both scale and scope, with the result that the agency is poorly positioned to take full advantage of the scientific opportunities offered by the now fully equipped and staffed ISS laboratory, or to effectively pursue the scientific research needed to support the development of advanced human exploration capabilities. Although its review has left it deeply concerned about the current state of NASA's life and physical sciences research, the Committee for the Decadal Survey on Biological and Physical Sciences in Space is nevertheless convinced that a focused science and engineering program can achieve successes that will bring the space community, the U.S. public, and policymakers to an understanding that we are ready for the next significant phase of human space exploration. The goal of this report is to lay out steps and develop a forward-looking portfolio of research that will provide the basis for recapturing the excitement and value of human spaceflight-thereby enabling the U.S. space program to deliver on new exploration initiatives that serve the nation, excite the public, and place the United States again at the forefront of space exploration for the global good.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1991 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Human Health and Performance Risks of Space Exploration Missions by : Jancy C. McPhee
Download or read book Human Health and Performance Risks of Space Exploration Missions written by Jancy C. McPhee and published by U. S. National Aeronautics & Space Administration. This book was released on 2009 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Health Risks of Radon and Other Internally Deposited Alpha-Emitters by : National Research Council
Download or read book Health Risks of Radon and Other Internally Deposited Alpha-Emitters written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes hazards from radon progeny and other alpha-emitters that humans may inhale or ingest from their environment. In their analysis, the authors summarize in one document clinical and epidemiological evidence, the results of animal studies, research on alpha-particle damage at the cellular level, metabolic pathways for internal alpha-emitters, dosimetry and microdosimetry of radionuclides deposited in specific tissues, and the chemical toxicity of some low-specific-activity alpha-emitters. Techniques for estimating the risks to humans posed by radon and other internally deposited alpha-emitters are offered, along with a discussion of formulas, models, methods, and the level of uncertainty inherent in the risk estimates.
Author :Percival D. McCormack Publisher :Springer Science & Business Media ISBN 13 :1461315670 Total Pages :845 pages Book Rating :4.4/5 (613 download)
Book Synopsis Terrestrial Space Radiation and Its Biological Effects by : Percival D. McCormack
Download or read book Terrestrial Space Radiation and Its Biological Effects written by Percival D. McCormack and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 845 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is based on the proceedings of an Advanced Study Institute (ASI) sponsored by the North Atlantic Treaty Organization (NATO) held October 1987 in Corfu, Greece. The Institute received financial support from the National Aeronautics and Space Administration, U.S.A. Armed Forces Radiobiology Research Institute, U.S.A. Department of Energy, U.S.A. Deutsche Forschungs-und Versuchanstalt fur Luft und Raumfahrt e.v., Kaln, Germany The advent of the shuttle era is providing fresh impetus for large space ventures such as communication centers, solar power stations, astronomical observatories, orbiting factories, and space based radar. Such ventures will rely heavily on an extensive and prolonged human presence in space doing in-orbit construction, maintenance, and opera tion. Among the advantages of location in space are the near zero gravity environment, commanding location, and the reception of solar energy and astronomical signals unattenuated by the atmosphere. Central to long-term manned space missions are the problems associated with the effects of exposure to ionizing radiations on humans. Manned space mis sions in the past have encountered relatively benign radiation environ ments because of their very short duration and orbit configuration. However, crew stay time of up to a year has been recently achieved by the Soviet space program; and Mars missions lasting several years are under serious consideration.
Book Synopsis Space Radiation Cancer Risk Projections for Exploration Missions: Uncertainty Reduction and Mitigation by :
Download or read book Space Radiation Cancer Risk Projections for Exploration Missions: Uncertainty Reduction and Mitigation written by and published by DIANE Publishing. This book was released on 2002 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Cancer Risks in Populations Near Nuclear Facilities by : National Research Council
Download or read book Analysis of Cancer Risks in Populations Near Nuclear Facilities written by National Research Council and published by National Academies Press. This book was released on 2012-06-29 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late 1980s, the National Cancer Institute initiated an investigation of cancer risks in populations near 52 commercial nuclear power plants and 10 Department of Energy nuclear facilities (including research and nuclear weapons production facilities and one reprocessing plant) in the United States. The results of the NCI investigation were used a primary resource for communicating with the public about the cancer risks near the nuclear facilities. However, this study is now over 20 years old. The U.S. Nuclear Regulatory Commission requested that the National Academy of Sciences provide an updated assessment of cancer risks in populations near USNRC-licensed nuclear facilities that utilize or process uranium for the production of electricity. Analysis of Cancer Risks in Populations near Nuclear Facilities: Phase 1 focuses on identifying scientifically sound approaches for carrying out an assessment of cancer risks associated with living near a nuclear facility, judgments about the strengths and weaknesses of various statistical power, ability to assess potential confounding factors, possible biases, and required effort. The results from this Phase 1 study will be used to inform the design of cancer risk assessment, which will be carried out in Phase 2. This report is beneficial for the general public, communities near nuclear facilities, stakeholders, healthcare providers, policy makers, state and local officials, community leaders, and the media.
Book Synopsis Solar Energetic Particles by : Donald V. Reames
Download or read book Solar Energetic Particles written by Donald V. Reames and published by Springer. This book was released on 2017-03-10 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise primer introduces the non-specialist reader to the physics of solar energetic particles (SEP) and systematically reviews the evidence for the two main mechanisms which lead to the so-called impulsive and gradual SEP events. More specifically, the timing of the onsets, the longitude distributions, the high-energy spectral shapes, the correlations with other solar phenomena (e.g. coronal mass ejections), as well as the all-important elemental and isotopic abundances of SEPs are investigated. Impulsive SEP events are related to magnetic reconnection in solar flares and jets. The concept of shock acceleration by scattering on self-amplified Alfvén waves is introduced, as is the evidence of reacceleration of impulsive-SEP material in the seed population accessed by the shocks in gradual events. The text then develops processes of transport of ions out to an observer. Finally, a new technique to determine the source plasma temperature in both impulsive and gradual events is demonstrated. Last but not least the role of SEP events as a radiation hazard in space is mentioned and a short discussion of the nature of the main particle telescope designs that have contributed to most of the SEP measurements is given.
Book Synopsis Radiation Health Research, 1986 - 1990 by :
Download or read book Radiation Health Research, 1986 - 1990 written by and published by . This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :030949771X Total Pages :143 pages Book Rating :4.3/5 (94 download)
Book Synopsis The Future of Low Dose Radiation Research in the United States by : National Academies of Sciences, Engineering, and Medicine
Download or read book The Future of Low Dose Radiation Research in the United States written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-01-13 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposures at low doses of radiation, generally taken to mean doses below 100 millisieverts, are of primary interest for setting standards for protecting individuals against the adverse effects of ionizing radiation. However, there are considerable uncertainties associated with current best estimates of risks and gaps in knowledge on critical scientific issues that relate to low dose radiation. The Nuclear and Radiation Studies Board of the National Academies hosted the symposium on The Future of Low Dose Radiation Research in the United States on May 8 and 9, 2019. The goal of the symposium was to provide an open forum for a national discussion on the need for a long-term strategy to guide a low dose radiation research program in the United States. The symposium featured presentations on low dose radiation programs around the world, panel discussions with representatives from governmental and nongovernmental organizations about the need for a low dose radiation research program, reviews of low dose radiation research in epidemiology and radiation biology including new directions, and lessons to be learned from setting up large research programs in non-radiation research fields. This publication summarizes the presentation and discussion of the symposium.
Book Synopsis Health Standards for Long Duration and Exploration Spaceflight by : Board on Health Sciences Policy
Download or read book Health Standards for Long Duration and Exploration Spaceflight written by Board on Health Sciences Policy and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: edicine to outline the ethics principles and practices that should guide the agency's decision making for future long duration or exploration missions that fail to meet existing health standards. Health Standards for Long Duration and Exploration Spaceflight identifies an ethics framework, which builds on the work of NASA and others, and presents a set of recommendations for ethically assessing and responding to the challenges associated with health standards for long duration and exploration spaceflight. As technologies improve and longer and more distant spaceflight becomes feasible, NASA and its international and commercial partners will continue to face complex decisions about risk acceptability. This report provides a roadmap for ethically assessing and responding to the challenges associated with NASA's health standards for long duration and exploration missions. Establishing and maintaining a firmly grounded ethics framework for this inherently risky activity is essential to gui
Book Synopsis Radiation and Reason by : Wade Allison
Download or read book Radiation and Reason written by Wade Allison and published by YPD-BOOKS. This book was released on 2009 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a positive and accessible account of the effect of radiation on life that brings good news for the future of mankind. For more than half a century the view that radiation represents an extreme hazard has been accepted. This book challenges that view by facing the question "How dangerous is ionising radiation?" Briefly the answer is that radiation is about a thousand times less hazardous than suggested by current safety standards. For many this will come as a surprise and then quickly raise a second question "Why are people so worried about radiation?" This is the out-of-date result of Cold War politics combined with a concern about radiation that was appropriate in an earlier age when the scientific understanding was limited. In the book these answers are explained in accessible language and related directly to modern scientific evidence and understanding, for instance the high levels of radiation used to the benefit of health in every major hospital. Four facts illustrate the need for a new understanding. 1. The radiation levels in the nuclear waste storage hall at Sellafield, UK are so low (1 micro-sievert per hour) that anyone would have to stay there for a million hours to receive the same dose that any patient on a course of radiotherapy treatment receives to their healthy tissue in a single day (1 sievert or gray). 2. The radiation dose experienced by the survivors of the Hiroshima and Nagasaki bombs caused 0.6% to die of radiation-induced cancer between 1950 and 2000, that is about 1/20 of the chance of dying of cancer anyway and less than the chance of being killed on US highways in that period. 3. The wildlife at Chernobyl today is reported to be thriving, despite being radioactive. 4. The mortality of UK radiation workers before age 85 from all cancers is 15-20% lower than comparable groups. The case for a complete change in attitude towards radiation safety is unrelated to the effects of climate change. But the realisation that radiation and nuclear energy are much safer than is usually supposed is of extreme importance to the current discussion of alternatives to fossil fuels and their relative costs.
Book Synopsis Space Radiation Health Research, 1991-1992 by :
Download or read book Space Radiation Health Research, 1991-1992 written by and published by . This book was released on 1993 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
