Radiation Risks
Mostrando 13-24 de 48 artigos, teses e dissertações.
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13. As estações rádio base na cidade de São Paulo: uma aboradagem sobre os riscos e uma contribuição para os sistemas de gerenciamento / RADIO BASE STATIONS IN THE CITY OF SÃO PAULO: a discussion of risks and a contribution to the management systems
O desenvolvimento da tecnologia de telecomunicação móvel ensejou a implantação massiva de ERBs (Estações rádio base) para o atendimento da crescente demanda ocorrida na última década. As ERBs, por sua vez, constituem fontes emissoras de radiação não ionizante. Os estudos científicos concluídos nos últimos anos indicam que a exposição à rad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2012
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14. Desenvolvimento de um sistema computacional de gerenciamento de riscos em processos de radioesterilização de tecidos biológicos / Development of a computational system (software) of risk management in the process of radio-sterilization of biological tissues
Risk management can be understood to be a systematic management which aims to identify record and control the risks of a process. Applying risk management becomes a complex activity, due to the variety of professionals involved. In order to execute risk management the following are requirements of paramount importance: the experience, discernment and judgmen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2010
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15. Sustainable business: the concept of governance change - application a company in the petrochemical / Sustentabilidade empresarial: o conceito da governança climática aplicação a uma empresa do ramo de petroquímica
With vital significance, the greenhouse effect gases (GEG), as carbon dioxide and methane, among others, retain sun heat in the atmosphere. This fact avoids sun radiation from dissipating, without letting the Planet being warm enough to keep right conditions for live existence of Earth. However, mankind activities are increasing concentration of these gases
Publicado em: 2009
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16. MÉTODOS ESTATÍSTICOS APLICADOS AO CÁLCULO DA AMPACIDADE E RISCO TÉRMICO DE LINHAS AÉREAS DE TRANSMISSÃO / STATISTICAL METHODS APPLIED TO AMPACITY AND THERMAL RISK CALCULATION OF OVERHEAD TRANSMISSION LINES
This work presents a new proposition for calculation of statistical ampacity and thermal risks associated to ampacity values by using simulation methods that employ intensive computation. The proposed approach uses Bootstrap and Monte Carlo simulation methods in order to calculate and infer information of statistical ampacity drawn from meteorological variab
Publicado em: 2008
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17. Desenvolvimento de um sistema on-line para a avaliação de doses fetais em radiologia diagnóstica / Development of on line system for the evaluation of fetal doses in diagnostic radilogy
In this work, an online system called Dose Fetal Web was developed for the evaluation of fetal doses in diagnostic radiology. The methodology used in this system estimates the fetal dose from data related to radiologic diagnostic examinations of a pregnant patient, or from the routine individual monitoring dosimetry of a pregnant worker. The input data of th
Publicado em: 2008
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18. Exposição à radiação ionizante dos profissionais de saúde em hemodinâmica: o enfoque da enfermagem / Exposure of health professionals to ionizing radiation at hemodynamic: the nursing s vision
Ionizing radiations have been used in the contemporary medicine, inserted in disgnostic and therapeutical contexts. Therefore, the object of this study was the relation among ionizing radiation exposition and the work process of the health professionals at hemodynamic; the objectives were: know the profile of the professionals working at hemodynamic unit, id
Publicado em: 2007
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19. Dose de radiação ionizante decorrente do uso de fertilizantes agrícolas / Ionizing radiation dose due to the use of agricultural fertilizers
Among several agents that exist in the environment which can expose us to different risks and effects, there is the ionizing radiation whose knowledge of dose is of importance to the effective control and prevention of possible damages to human beings and to the environment. The transfer of radionuclides from fertilizers to/and soils to the foodstuffs can re
Publicado em: 2007
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20. Doses e risco de radiação em estudo tomográfico computadorizado do tórax com tecnologia de quatro cortes
The computerized tomography (CT) is an important method for studying chest pathologies to provide its morphological and functional analysis and to allow a specific therapeutic approach of signs or symptoms resulting from diseases. Since CT uses ionizing radiation, it should be considered that a precise balance between risks and benefits must be achieved in o
Publicado em: 2006
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21. Fenóis totais no cafeeiro em razão das fases de frutificação e do clima. / Total phenols in the coffee tree due to the fructification phases and the climate.
The vegetables show a natural defense against external factors, biotic and abiotic, by the synthesis of the phenolic compounds in the secondary metabolism, which varies with the maturity state and with the climate. The increase of phenolic compounds in the plants is directly related to the resistance to the infection thought pathogens and insect infestation.
Publicado em: 2005
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22. Cancer risks attributable to low doses of ionizing radiation: Assessing what we really know
High doses of ionizing radiation clearly produce deleterious consequences in humans, including, but not exclusively, cancer induction. At very low radiation doses the situation is much less clear, but the risks of low-dose radiation are of societal importance in relation to issues as varied as screening tests for cancer, the future of nuclear power, occupati
National Academy of Sciences.
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23. Real and Perceived Risks of Medical Radiation Exposure
There is almost no subject that elicits greater concern and less objective understanding than that of exposure of patients to radiation accompanying diagnostic radiologic procedures. One or more of the health effects (cancer, developmental abnormalties and genetic changes) attributed to low-level exposure to radiation are frequently misinterpreted as likely
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24. Job related mortality risks of Hanford workers and their relation to cancer effects of measured doses of external radiation.
This paper continues the series by Mancuso, Stewart, and Kneale (MSK) on studies of cancer risks for radiation workers at Hanford. It concentrates on the statistical problems posed by the need to estimate and control for job related mortality risks when there are several changes of occupation and no certainty about how different occupations are related to tw