Rocket Phonics reading books are fully decodable phonics books allowing children to practise their phonic skills in context, developing emerging reading skills. What happens when there is no gas at home? There is no heating, no-one can cook and there is no hot water to wash with. Who can fix this problem? The gas man, of course! Reading age: 4-5 years
The direct simulation Monte Carlo (DSMC) method has, in recent years, become widely used for engineering and scientific studies of gas flows that involve low densities or very small physical dimensions. The method is a direct physical simulation of the motion of representative molecules, rather than a numerical solution of the equations that provide a mathematical model of the flow. The computations are no longer expensive and the period since the original 1976 publication of this work has seen enormous improvements in the molecular models, the procedures, and the implementation strategies. This greatly expanded new version of the author's seminal Molecular Gas Dynamics will be considered the definitive text on the subject. It includes all the refinements and research since the earlier book. The molecular theory of gas flows is developed from first principles and is extended to cover new models and procedures. The method and typical applications are illustrated through 13 demonstration programs that are listed in FORTRAN source code on a companion website. All numerical results in the book have been obtained from these programs. The applications range from verification cases for simple homogeneous gases to complex multidimensional flows of gas mixtures and chemically reacting flows.
Pierre Gassendi (1592-1655) lived in three civilizations in the span of one life-time: medieval ecclesiastic, Renaissance humanist and modern and he never cut himself loose from any of them. It is probably scientific; because he managed to be at home in all three that history has allocated to him a position somewhere on the fringe of the inner circle of genius in the seventeenth-century scientific revolution. While he was not a front-runner, Gassendi was nevertheless a pioneer of modern corpuscularianism and his influence on the development of empirical science was truly international. It is precisely because Gassendi was a figure of the second rank - a significant but lesser luminary - that we need to examine his work closely, for the less famous contemporaries help us to explain what the great ones do. It might seem that Gassendi has received his share of attention from scholars, even though it is sometimes suggested otherwise. Several full- length monographs have been published in the past three decades, and there have been a number of articles in scholarly journals. Yet, despite the indisputable worth of these studies, the picture of Gassendi that has emerged from them has been partial and at times wide of the mark, so that the true story remains to be told.
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