Radiation quantities

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  • Document presentation of content: Radiation in gastroenterology, effects of radiation, radiation protection for staff and patients, Cascades - Management options taking available resources into account, special circumstances, Appendix - Radiation quantities and units

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  • The objective of this manual is to improve the international exchange of scientific information. The recommendations made to achieve this end come under three general headings. The first is the use of quantity calculus for handling physical quantities, and the general rules for the symbolism of quantities and units, described in chapter 1. The second is the use of internationally agreed symbols for the most frequently used quantities, described in chapter 2.

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  • Heat transfer is a fundamental part of thermal engineering. It is the science of the rules governing the transfer of heat between systems of different temperatures. In thermodynamics, the heat transferred from one system to its surroundings is assumed as a given process parameter. This assumption does not give any information on how the heat is transferred and which rules determine the quantity of the transferred heat. Heat transfer describes the dependencies of the heat transfer rate from a corresponding temperature difference and other physical conditions....

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  • Stroke involves cerebral infarction and hemorrhaging and is associated with very high mortality. Previous reports have indicated that ischemic stimulation such as the reoxygenation that occurs after hypoxia produces a large quantity of reactive oxygen species (ROS) that strongly induces neuronal death in vivo and in vitro (Negishi et al., 2001). Indeed, this is considered to be the factor that most strongly induces cell death in cerebral ischemia. In recent years, apoptosis has been suggested to be the mechanism responsible for ischemic neuronal death in animal stroke models (Tagami et al.

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  • The textbook written by Paul Davies in 19891 entitled, The New Physics, commenced with the following opinion. Many elderly scientists look back nostalgically at the first 30 years of the 20th century, and refer to it as the golden age of physics. Historians, however, may come to regard those years as the dawning of the New Physics. The events which the quantum and relativity theories set in train are only now impinging on science, and many physicists believe that the golden age was only the beginning of the revolution....

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  • Retailing has undergone dynamic change in a few decades. Regional and national chainstore organizations have grown rapidly. In our automobile age, retail stores have become fewer and larger. They also have enlarged their services to buyers. Retailers, wholesalers, processors, farmer cooperatives and farm organizations and trade associations are engaged in merchandising farm products.

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  • Since mid-2009, North Korea has admitted it has a uranium enrichment program and implied that it will enrich uranium on a significant scale in the near future. After years of denial, North Korea mentioned its uranium enrichment program in public statements as tensions increased following its ballistic missile test in April 2009, its May 2009 nuclear test, and the subsequent imposition of United Nations Security Council sanctions against North Korean trading entities.

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  • Plants are continuously affected by a variety of environmental factors. Whereas biotic environmental factors are other organisms such as symbionts, parasites, pathogens, herbivores, and competitors, abiotic factors include parameters and resources which determine plant growth like temperature, relative humidity, light, availability of water, mineral nutrients, and CO 2 , as well as wind, ionizing radiation, or pollutants (Schulze et al. 2002 ) . The effect each abiotic factor has on the plant depends on its quantity or intensity.

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  • This however brings about models and simulation, which is now applied generally to look into the inter-relationship between the parameters and its resultant effects on the environments (Abdulkareem et al., 2011). In this work, mathematical modelling that can be used to predict the quantity of heat radiation from gas flaring station will be developed. The developed model will be simulated and find interaction between various parameters such as distance, volume of gas flared, flared stack efficiency that influence the rate of heat radiation from gas flaring station.

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