Springer dez 1975 (5 Ergebnisse)

Buch. Zustand: Neu. Neuware - To STUDY the philosophy of science has always been a complex task, reaching to the methods and achievements of the sciences, to their histories and their contexts, and to their human implications. Sometimes favored by their social environment, sometimes dissenting from their Zeitgeist, the scientists have taken varying roles in the social spectrum, allied with differing interests, classes, powers, religions, evaluative outlooks. Philosophers should be interested as much in the changing social situations of science and of scientists as in the changing empirical findings and explanatory conceptions; recognition that rationality, experience, and inquiry have a history is no longer novel. Moreover the historical development of scientific perceptions of nature is linked-whether loosely or tightly--by the development of perceptions of science itself. Percep tions of science are located not only in the self-awareness of scientists but also in the critical awareness of their fellow human beings. No doubt some friends or critics are more articulate than others, but the context for science has not been bland or neutral. Plaything, weapon, savior, hireling, magician, devil, priest, the stereotypes of science and scientist are neither the simple result of plain ignorance nor the obvious reflection of some successes and some failures of the scientific enterprise. Public perceptions of science have great importance for understanding both the public in society and the sciences at the stage per ceived.…

Buch. Zustand: Neu. Neuware - It is the purpose of this book to present a concise and sufficiently detailed de scription of the present state and possibilities of calculating chemical equilibria of gas mixtures. It is based on a book by one of the authors, published in Czech by the Publishing House Academia in Prague. The rapid development of the topic during the two years since publication of the Czech edition has made it necessary to revise practically all the sections in order to bring them up to the present level of know ledge. One reason for writing this book was the practical requirement of contemporary industry, where a rational utilization of equilibrium composition calculations may provide valuable information concerning processes under study in all stages of their implementation. A second reason was the need of a text-book for studying this part of chemical thermodynamics in the scope as taught at the Institute of Chemical Technology, Prague. These two basic motives determine the overall structure of the book, as well as the proportions and arrangement of the chapters. The book includes fundamental thermodynamic concepts as well as the mathematical apparatus needed to solve the problems involved, care being taken that the discussion should always l!!ad to a practical procedure of performing equilibrium calculations in gas-phase systems of any degree of complexity whatever. Knowledge of chemical thermodynamics on the level of a fundamental university course is assumed.…

Buch. Zustand: Neu. Neuware - Organic chemistry is constantly concerned with effecting reactions at a particular centre in a complex molecule, and if possible with a high and predictable level of stereoselectivity. In the light of much accumulated ex perience within organic chemistry it is usually possible to assess the likeli hood of alternative reaction pathways at least qualitatively. However, well based expectations can be falsified, and the experiments directed to the synthesis of vitamin B12 which led to Woodward's recognition of orbital symmetry control in organic chemistry are an instructive example. Our limi tations in this respect are very much accentuated in the case of hetero geneous reactions, which present additional problems, and except for very well studied instances, heterogeneous catalysis has remained a relatively empirical area of chemistry. Knowledge in this area has, however, been greatly improved by the development of transition metal complexes which replicate the catalytic properties of the metals, and are effective in a homo geneous reaction system. This development has advanced our understanding of catalysis by making it possible to interpret reactions in strictly molecular terms. In addition, these homogeneously active complexes are frequently more selective than their heterogeneous metallic counterparts either in discriminating between different functional centres in a molecule or in of fering better stereoselectivity. Homogeneous catalysts have now been devised for a number of organic chemical reactions, including hydrogenation, carbonylation, polymerisa tion, and isomerisation and dismutation of alkenes.…

Taschenbuch. Zustand: Neu. Neuware - In May of 1973 we organized an international research colloquium on foundations of probability, statistics, and statistical theories of science at the University of Western Ontario. During the past four decades there have been striking formal advances in our understanding of logic, semantics and algebraic structure in probabilistic and statistical theories. These advances, which include the development of the relations between semantics and metamathematics, between logics and algebras and the algebraic-geometrical foundations of statistical theories (especially in the sciences), have led to striking new insights into the formal and conceptual structure of probability and statistical theory and their scientific applications in the form of scientific theory. The foundations of statistics are in a state of profound conflict. Fisher's objections to some aspects of Neyman-Pearson statistics have long been well known. More recently the emergence of Baysian statistics as a radical alternative to standard views has made the conflict especially acute. In recent years the response of many practising statisticians to the conflict has been an eclectic approach to statistical inference. Many good statisticians have developed a kind of wisdom which enables them to know which problems are most appropriately handled by each of the methods available. The search for principles which would explain why each of the methods works where it does and fails where it does offers a fruitful approach to the controversy over foundations.…

Buch. Zustand: Neu. Neuware.