springer netherlands springer netherlands jun 2000 (55 risultati)

Taschenbuch. Condizione: Neu. Neuware -Optical methods for investigating semiconductors and the theoretical description of optical processes have always been an important part of semiconductor physics. Only the emphasis placed on different materials changes with time. Here, a large number of papers are devoted to quantum dots, presenting the theory, spectroscopic investigation and methods of producing such structures. Another major part of the book reflects the growing interest in diluted semiconductors and II-IV nanosystems in general.There are also discussions of the fascinating field of photonic crystals. `Classical' low dimensional systems, such as GsAs/GaAlAs quantum wells and heterostructures, still make up a significant part of the results presented, and they also serve as model systems for new phenomena. New materials are being sought, and new experimental techniques are coming on stream, in particular the combination of different spectroscopic modalities.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 460 pp. Englisch.

Buch. Condizione: Neu. Neuware -Saponins are glycosides of triterpenes, steroids or steroidal alkaloids. They can be found in plants and marine organisms. Very diverse biological activities are ascribed to saponins and they play important roles in food, animal feedstuffs, and pharmaceutical properties. This volume provides a selection of recent work on saponins presented at a symposium in Pulawy, Poland, in 1999. Many different aspects are treated: analysis, separation, biological activities, relevant use in human and animal nutrition, and ecological significance. This book will be of use to researchers both in universities and industry.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 308 pp. Englisch.

Buch. Condizione: Neu. Neuware -here ofexchange, and borrowing in debates between these disciplines, all the more so, as we shall see a little further on, as the analysis of the Central and East European transformations has also contributed to introduce into political science and sociology theoretical systematizations first formulated in economics. In addition to this opening up to the objects and theories of economics, the pseudo-'dilemma' ofsimultaneity produced, by a kind of feedback, another series of effects on transitology and the related research domains. Contrary to most expectations and predictions in the wake ofthe 1989 upheavals - affirmations that the 'dilemmas', 'problems' or 'challenges' of the transitions in Central and Eastern Europe ought to have been dealt with and resolved one after the other in sequence, in the manner of the more or less idealized trajectories of Great Britain or Spain (trajectories significantly enough promoted, far beyond the circles of scholars, as a 'model' of transition), andabove all, contrary to the assumption that superposing a radical economic transformation upon a transition to democracy would make the whole edifice thoroughly unworkable, unstable or dangerous - it must be stated clearly out that the two processes, in their 'simultaneity', are not necessarily incompatible. This is one of the main findings stressed upon in several chapters of this book.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 296 pp. Englisch.

Buch. Condizione: Neu. Neuware -In her letters Mme de Staël provides a panoramic historical outlook of the European literary, cultural and political scene between 1789 and 1817, i.e. the Revolution, the Napoleonic era and the Restoration.This edition, as its French original, includes rare contemporary illustrations never published before in this connection.For this book there is no specific level of readership.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 436 pp. Englisch.

Buch. Condizione: Neu. Neuware -From Catastrophe to Chaos: A General Theory of Economic Discontinuities presents and unusual perspective on economics and economic analysis. Current economic theory largely depends upon assuming that the world is fundamentally continuous. However, an increasing amount of economic research has been done using approaches that allow for discontinuities such as catastrophe theory, chaos theory, synergetics, and fractal geometry. The spread of such approaches across a variety of disciplines of thought has constituted a virtual intellectual revolution in recent years. This book reviews the applications of these approaches in various subdisciplines of economics and draws upon past economic thinkers to develop an integrated view of economics as a whole from the perspective of inherent discontinuity. 332 pp. Englisch.

Buch. Condizione: Neu. Neuware -This publication comprises the proceedings of the first International Conference devoted to the structural roots of trees and woody plants. 'The Supporting Roots - Structure and Function,' 20-24 July 1998, Bordeaux, France. The meeting was held under the auspices ofIUFRO WPS 2. 01. 13 'Root Physiology and Symbiosis,' and its aim was to bring together scientific researchers, foresters and arboriculturalists, to discuss current problems in structural root research and disseminate knowledge to an audience from a wide disciplinary background. For the first time in an international conference, emphasis was placed on presenting recent reseach in the field of tree anchorage mechanics and root biomechanics. The way in which tree stability can be affected by root system symmetry and architecture was addressed, as well as how movement during wind sway can influence the development and shape of woody roots. The role of different nursery and planting techniques was discussed, in relation to effects on root system form and development. Root response to different environmental stresses, including water, temperature, nutrient and mechanical stress was addressed in detail. The structure and function of woody roots was also considered at different levels, from coarse to fine roots, with several papers discussing the interaction between roots and the rhizosphere. One of the conference highlights was the presentation of new methods in root research, by a series of workshops held at LRBB-INRA, Pierroton, on the northern border of the Gascony forest. 444 pp. Englisch.

Buch. Condizione: Neu. Neuware -The NATO Advanced Study Institute on the Prevention of Crime and Violence Among the Mentally III was held in May 1999 in Tuscany, Italy. Participants from 15 countries attended. Since care for persons with mental illness (schizophrenia, major depression, bipolar disorder, delusional disorder, atypical psychoses) has been deinstitutionalized, some persons with these disorders are committing crimes and serious violence. Consequently, societies around the world are confronted with a new challenge: to provide mental health care and social services to mentally ill persons in a humane way that will prevent illegal behaviours. Research in this field has been dominated by investigations designed to improve clinicians' accuracy in predicting violent behaviours, with little attention focused on the organization and implemen tation of treatments. The premise of the Advanced Study Institute was that treatments must have em pirically proven efficacy. Both professional ethics and public accountability require empirical evidence that each treatment will alleviate the problem that it targets. However, despite the fact that Western industrial societies provide treatment for mentally ill persons who have offended, there is a very limited base of knowledge on what constitutes effective treatment and how such treatments should be organized and delivered. The Advanced Study Institute was an attempt to stimulate and encour age research that will extend this knowledge base. The goals were to review what is known about mentally ill offenders and about effective treatments for them, and to provide a framework for the orientation of future investigations designed to improve treatment efficacy. 436 pp. Englisch.

Buch. Condizione: Neu. Neuware -As I explain in the introduction, this is the third in aseries of collections of my previously published essays in legal theory. All of the essays here but three have been revised for this volume. I now wish to record my gratitude and indebtedness to various persons. I am most indebted and grateful to my wife, Dorothy Kopp Summers, to whom I dedicate this book. I also wish to re cord my gratitude for his interest and patience to Hendrik-Jan van Leusen of Kluwer Academic Publishers. He strongly encouraged me to put this collection together, and without his efforts, it certainly would not have appeared in this timely fashion. I also wish to thank his successor, Sabine Wesseldijk, for assistance. In the course of my academic career, I have benefitted greatly from the many Comell Law School students serving as my research assistants. I have also been privileged to have the fine aid of many Comell Law School secretaries and administrative assistants. Foremost here is Mrs. Pamela Finnigan who has so ably seen this collection put together from start to finish.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 468 pp. Englisch.

Taschenbuch. Condizione: Neu. Neuware -Cyanobacteria make a major contribution to world photosynthesis and nitrogen fixation, but are also notorious for causing nuisances such as dense and often toxic `blooms' in lakes and the ocean. The Ecology of Cyanobacteria: Their Diversity in Time and Space is the first book to focus solely on ecological aspects of these organisms. Its twenty-two chapters are written by some thirty authors, who are leading experts in their particular subject.The book begins with an overview of the cyanobacteria - or blue-green algae, for those who are not specialists - then looks at their diversity in the geological record and goes on to describe their ecology in present environments where they play important roles. Why is one of the key groups of organisms in the Precambrian still one of the most important groups of phototrophs today The importance of ecological information for rational management and exploitation of these organisms for commercial and other practical purposes is also assessed. Accounts are provided of nuisances as well as the ecology of the commercially successful Spirulina and the role of cyanobacteria in ecosystem recovery from oil pollution.Many chapters include aspects of physiology, biochemistry, geochemistry and molecular biology where these help general understanding of the subject. In addition there are three chapters dealing specifically with molecular ecology. Thirty-two pages of colour photos incorporate about seventy views and light micrographs. These features make the book valuable to a wide readership, including biologists, microbiologists, geologists, water managers and environmental consultants. The book complements the highly successful The Molecular Biology of Cyanobacteria already published by Kluwer.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 736 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In [Hardy and Williams, 1986] the authors exploited a very simple idea to obtain a linear congruence involving class numbers of imaginary quadratic fields modulo a certain power of 2. Their congruence provided a unified setting for many congruences proved previously by other authors using various means. The Hardy-Williams idea was as follows. Let d be the discriminant of a quadratic field. Suppose that d is odd and let d = PIP2 . . Pn be its unique decomposition into prime discriminants. Then, for any positive integer k coprime with d, the congruence holds trivially as each Legendre-Jacobi-Kronecker symbol (~) has the value + 1 or -1. Expanding this product gives ~ eld e:=l (mod4) where e runs through the positive and negative divisors of d and v (e) denotes the number of distinct prime factors of e. Summing this congruence for o k Idl/8, gcd(k, d) = 1, gives ~ (-It(e) ~ (~) =:O(mod2n). eld o 276 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The theory of foliations and contact forms have experienced such great de velopment recently that it is natural they have implications in the field of mechanics. They form part of the framework of what Jean Dieudonne calls 'Elie Cartan's great theory ofthe Pfaffian systems', and which even nowa days is still far from being exhausted. The major reference work is. without any doubt that of Elie Cartan on Pfaffian systems with five variables. In it one discovers there the bases of an algebraic classification of these systems, their methods of reduction, and the highlighting ofthe first fundamental in variants. This work opens to us, even today, a colossal field of investigation and the mystery of a ternary form containing the differential invariants of the systems with five variables always deligthts anyone who wishes to find out about them. One of the goals of this memorandum is to present this work of Cartan - which was treated even more analytically by Goursat in its lectures on Pfaffian systems - in order to expound the classifications currently known. The theory offoliations and contact forms appear in the study ofcompletely integrable Pfaffian systems of rank one. In each of these situations there is a local model described either by Frobenius' theorem, or by Darboux' theorem. It is this type of theorem which it would be desirable to have for a non-integrable Pfaffian system which may also be of rank greater than one. 260 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Optical methods for investigating semiconductors and the theoretical description of optical processes have always been an important part of semiconductor physics. Only the emphasis placed on different materials changes with time. Here, a large number of papers are devoted to quantum dots, presenting the theory, spectroscopic investigation and methods of producing such structures. Another major part of the book reflects the growing interest in diluted semiconductors and II-IV nanosystems in general. There are also discussions of the fascinating field of photonic crystals. `Classical' low dimensional systems, such as GsAs/GaAlAs quantum wells and heterostructures, still make up a significant part of the results presented, and they also serve as model systems for new phenomena. New materials are being sought, and new experimental techniques are coming on stream, in particular the combination of different spectroscopic modalities. 460 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The germs of the ideas in this book became implanted in me during my experience as a resident in clinical pathology at Boston University Medical Center. At the time, I had inklings that the test results churned out by our laboratories were more than scientific facts. As a philosophically unsophisticated young physician, however, I had no language or framework to analyze what I saw as a deep philosophical problem, a problem largely unrecognized by most physicians. The test results provided by our laboratories were accurate and of great practical importance for patient care. However, most of the physicians who relied on our test results to diagnose and treat their patients either did not have the time or interest to consider the philosophical issues inherent in diagnosis, or, like me, had inadequate means to further analyze them. It was more than ten years later that I began doctoral studies in philosophy, and I was fortunate to find a faculty that was supportive of my efforts to address the problem. This book began as my doctoral dissertation in the Department of Philosophy at Georgetown University. I would like to acknowledge the assistance of my mentor, Robert Veatch, Ph. D. Our conversations during my Georgetown years led me in new and often fascinating directions. I would also like to acknowledge the help of Kenneth Schaffner, M. D. , Ph. D. 240 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In [Hardy and Williams, 1986] the authors exploited a very simple idea to obtain a linear congruence involving class numbers of imaginary quadratic fields modulo a certain power of 2. Their congruence provided a unified setting for many congruences proved previously by other authors using various means. The Hardy-Williams idea was as follows. Let d be the discriminant of a quadratic field. Suppose that d is odd and let d = PIP2 . . Pn be its unique decomposition into prime discriminants. Then, for any positive integer k coprime with d, the congruence holds trivially as each Legendre-Jacobi-Kronecker symbol (~) has the value + 1 or -1. Expanding this product gives ~ eld e:=l (mod4) where e runs through the positive and negative divisors of d and v (e) denotes the number of distinct prime factors of e. Summing this congruence for o 276 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The theory of foliations and contact forms have experienced such great de velopment recently that it is natural they have implications in the field of mechanics. They form part of the framework of what Jean Dieudonne calls 'Elie Cartan's great theory ofthe Pfaffian systems', and which even nowa days is still far from being exhausted. The major reference work is. without any doubt that of Elie Cartan on Pfaffian systems with five variables. In it one discovers there the bases of an algebraic classification of these systems, their methods of reduction, and the highlighting ofthe first fundamental in variants. This work opens to us, even today, a colossal field of investigation and the mystery of a ternary form containing the differential invariants of the systems with five variables always deligthts anyone who wishes to find out about them. One of the goals of this memorandum is to present this work of Cartan - which was treated even more analytically by Goursat in its lectures on Pfaffian systems - in order to expound the classifications currently known. The theory offoliations and contact forms appear in the study ofcompletely integrable Pfaffian systems of rank one. In each of these situations there is a local model described either by Frobenius' theorem, or by Darboux' theorem. It is this type of theorem which it would be desirable to have for a non-integrable Pfaffian system which may also be of rank greater than one.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 260 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Cardiovascular complications are not only responsible for more than half of our patients' mortality, they also represent the bulk of everyday problems in a dialysis unit. Yet, the space allocated to them in the major textbooks covers only 2-8% of their total content. The origins of this book lie in many years of day-to-day care of dialysis patients. It gradually became clear to the author that systematic application of well-known pathophysiological principles could improve patients' conditions beyond expectations. More importantly, it appeared that world literature was mainly concerned with evaluating risk factors and that efforts to improve prognosis were concentrated on urea removal. It is important, therefore, to notice that `Volume Control', the central issue of this book, is not incorporated into the `Adequacy' concept. While primarily intended for dialysis doctors, the author sincerely hopes that dialysis nurses, who carry the lion's share of day-to-day responsibility for dialysis patients, will also find this book a useful and practical guide to dialysis treatment. 156 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -30 years ago, polymer processing was considered to be a set of operations aiming at imparting a desired shape to the material, while its final properties were defined exclu sively by the molecular structure and architecture resulted from the respective synthetic approaches. These two fields of knowledge - polymer processing and polymer structure - grew closer as several scientific and technological works disclosed the microstructure and other morphological features developed by polymeric systems upon different process ing conditions. Even before the real understanding of the polymer structural details, engineers were able to make use of the effect of molecular orientation and to manufacture polymeric fi bres with enhanced properties in terms of stiffness and strength. However, it was during the 1970s that the scientific community started to relate microstructure development and the thermomechanical environment associated to different processing techniques. Ever since, very important works were done on semi crystalline, amorphous or blended polymers in order to identify and, recently, to predict the effect of the imposed shear fields and cool ing gradients on the final product properties. These efforts led to more accurate process ing methods and stimulated new engineering approaches, such as property enhancement through out-of-the-processing as well as on-line control. Modem processing technology has developed further towards the nano level, enabling impacts on the macromolecular structure. 396 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Dr. Olcbee Lee SchoolofEducation, UniversityofMiami Coral Gables, Florida 33124 I remember my excitement and appreciation several years ago when I first read World View Theory and Science Education Research by Bill Cobern (1991). It was a comprehensive, theoretical discussion ofworldview theory in science education. I am delighted to see that Cobern has taken the next step to provide empirical accountsofworldview in Everyday Thoughts about Nature. . The primary goal of the book is to understand how typical- ninth grade students and their science teachers think about Nature or the natural world, and how their thoughts are related to science. In pursuing this goal, the book raises a basicquestion about the purpose ofscienceeducationfor the public: Should science education seek to educate 'scientific thinkers' in the pattern of the science teachers Or, should science education seek to foster sound science learning within the matrices ofvari ous cultural perspectives (p. 3) The answer to this question becomes clear, thanks to Cobern's excellent research and persuasivearguments. First, this research takes a humanistic approach in understanding what students and teachers think about Nature 'through the language and ideas voluntarily expressed' (p. I). The research used multi directional prompts and encouraged students and teachers to speak freely and at length in any directions they wished. This humanistic approach is stated clearly: '[T]he research seeks to illuminate some of the various ways in which students think aboutNature withoutjudging eventhe most unorthodox perspectives' (p. 14). 180 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This monograph is devoted to a rapidly developing area of research of the qualitative theory of difference and functional differential equations. In fact, in the last 25 years Oscillation Theory of difference and functional differential equations has attracted many researchers. This has resulted in hundreds of research papers in every major mathematical journal, and several books. In the first chapter of this monograph, we address oscillation of solutions to difference equations of various types. Here we also offer several new fundamental concepts such as oscillation around a point, oscillation around a sequence, regular oscillation, periodic oscillation, point-wise oscillation of several orthogonal polynomials, global oscillation of sequences of real valued functions, oscillation in ordered sets, (!, R, ~)-oscillate, oscillation in linear spaces, oscillation in Archimedean spaces, and oscillation across a family. These concepts are explained through examples and supported by interesting results. In the second chapter we present recent results pertaining to the oscil lation of n-th order functional differential equations with deviating argu ments, and functional differential equations of neutral type. We mainly deal with integral criteria for oscillation. While several results of this chapter were originally formulated for more complicated and/or more general differ ential equations, we discuss here a simplified version to elucidate the main ideas of the oscillation theory of functional differential equations. Further, from a large number of theorems presented in this chapter we have selected the proofs of only those results which we thought would best illustrate the various strategies and ideas involved. 356 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Agriculture is a crucial component of the economies of many of the countries in transition from a centrally-planned to a market economy and the sector is by no means immune to the environmental and socioeconomic problems confronting the countries as a whole. The concept of sustainable development provides a convenient framework for the formulation of government environmental policy for such countries, especially those of them that aspire to join the EU and would thus be expected to meet EU environmental standards. For agriculture, this inevitably involves appropriate strategies for balancing crop and animal production while protecting the quality of the national soil and water resources. There is thus an urgent need to compile, exchange and evaluate current information on the quality of soils in these countries, and to assess the potential impact of new management practices on the soil and on the wider environment.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 396 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Among the key problems in modern field theory are the formulation of chiral group theories on the lattice and the quantitative understanding of the quark confinement mechanism. The two topics are closely related by the fact that the chiral nature of the fermions as well as the confinement force are largely topological in origin. Recent advances in this field are here reviewed by some of the world's experts.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 396 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Among the key problems in modern field theory are the formulation of chiral group theories on the lattice and the quantitative understanding of the quark confinement mechanism. The two topics are closely related by the fact that the chiral nature of the fermions as well as the confinement force are largely topological in origin. Recent advances in this field are here reviewed by some of the world's experts.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 396 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -30 years ago, polymer processing was considered to be a set of operations aiming at imparting a desired shape to the material, while its final properties were defined exclu sively by the molecular structure and architecture resulted from the respective synthetic approaches. These two fields of knowledge - polymer processing and polymer structure - grew closer as several scientific and technological works disclosed the microstructure and other morphological features developed by polymeric systems upon different process ing conditions. Even before the real understanding of the polymer structural details, engineers were able to make use of the effect of molecular orientation and to manufacture polymeric fi bres with enhanced properties in terms of stiffness and strength. However, it was during the 1970s that the scientific community started to relate microstructure development and the thermomechanical environment associated to different processing techniques. Ever since, very important works were done on semi crystalline, amorphous or blended polymers in order to identify and, recently, to predict the effect of the imposed shear fields and cool ing gradients on the final product properties. These efforts led to more accurate process ing methods and stimulated new engineering approaches, such as property enhancement through out-of-the-processing as well as on-line control. Modem processing technology has developed further towards the nano level, enabling impacts on the macromolecular structure.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 396 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -This monograph is devoted to a rapidly developing area of research of the qualitative theory of difference and functional differential equations. In fact, in the last 25 years Oscillation Theory of difference and functional differential equations has attracted many researchers. This has resulted in hundreds of research papers in every major mathematical journal, and several books. In the first chapter of this monograph, we address oscillation of solutions to difference equations of various types. Here we also offer several new fundamental concepts such as oscillation around a point, oscillation around a sequence, regular oscillation, periodic oscillation, point-wise oscillation of several orthogonal polynomials, global oscillation of sequences of real valued functions, oscillation in ordered sets, (!, R, ~)-oscillate, oscillation in linear spaces, oscillation in Archimedean spaces, and oscillation across a family. These concepts are explained through examples and supported by interesting results. In the second chapter we present recent results pertaining to the oscil lation of n-th order functional differential equations with deviating argu ments, and functional differential equations of neutral type. We mainly deal with integral criteria for oscillation. While several results of this chapter were originally formulated for more complicated and/or more general differ ential equations, we discuss here a simplified version to elucidate the main ideas of the oscillation theory of functional differential equations. Further, from a large number of theorems presented in this chapter we have selected the proofs of only those results which we thought would best illustrate the various strategies and ideas involved.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 356 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Cardiovascular complications are not only responsible for more than half of our patients' mortality, they also represent the bulk of everyday problems in a dialysis unit. Yet, the space allocated to them in the major textbooks covers only 2-8% of their total content. The origins of this book lie in many years of day-to-day care of dialysis patients. It gradually became clear to the author that systematic application of well-known pathophysiological principles could improve patients' conditions beyond expectations. More importantly, it appeared that world literature was mainly concerned with evaluating risk factors and that efforts to improve prognosis were concentrated on urea removal. It is important, therefore, to notice that `Volume Control', the central issue of this book, is not incorporated into the `Adequacy' concept. While primarily intended for dialysis doctors, the author sincerely hopes that dialysis nurses, who carry the lion's share of day-to-day responsibility for dialysis patients, will also find this book a useful and practical guide to dialysis treatment.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 156 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -30 years ago, polymer processing was considered to be a set of operations aiming at imparting a desired shape to the material, while its final properties were defined exclu sively by the molecular structure and architecture resulted from the respective synthetic approaches. These two fields of knowledge - polymer processing and polymer structure - grew closer as several scientific and technological works disclosed the microstructure and other morphological features developed by polymeric systems upon different process ing conditions. Even before the real understanding of the polymer structural details, engineers were able to make use of the effect of molecular orientation and to manufacture polymeric fi bres with enhanced properties in terms of stiffness and strength. However, it was during the 1970s that the scientific community started to relate microstructure development and the thermomechanical environment associated to different processing techniques. Ever since, very important works were done on semi crystalline, amorphous or blended polymers in order to identify and, recently, to predict the effect of the imposed shear fields and cool ing gradients on the final product properties. These efforts led to more accurate process ing methods and stimulated new engineering approaches, such as property enhancement through out-of-the-processing as well as on-line control. Modem processing technology has developed further towards the nano level, enabling impacts on the macromolecular structure. 396 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -An analysis of the optical revolution in the context of early 19th century Britain. Far from merely involving the replacement of one optical theory by another, the revolution also involved substantial changes in instruments and the practices that surrounded them. People's judgements about classification, explanation and evaluation were affected by the way they used such optical instruments as spectroscopes, telescopes, polarisers, photometers, gratings, prisms and apertures. There were two instrumental traditions in this historical period, each of which nurtured a body of practice that exemplified how optical instruments should be operated, and especially how the eye should be used. These traditions functioned just like paradigms, shaping perspectives and even world views.Readership: Scholars and graduate students in the history of science, history of instrument, philosophy of science and science studies. Can also be used as a textbook in graduate courses on 19th century physics.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 244 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Dr. Olcbee Lee SchoolofEducation, UniversityofMiami Coral Gables, Florida 33124 I remember my excitement and appreciation several years ago when I first read World View Theory and Science Education Research by Bill Cobern (1991). It was a comprehensive, theoretical discussion ofworldview theory in science education. I am delighted to see that Cobern has taken the next step to provide empirical accountsofworldview in Everyday Thoughts about Nature. . The primary goal of the book is to understand how typical- ninth grade students and their science teachers think about Nature or the natural world, and how their thoughts are related to science. In pursuing this goal, the book raises a basicquestion about the purpose ofscienceeducationfor the public: Should science education seek to educate 'scientific thinkers' in the pattern of the science teachers Or, should science education seek to foster sound science learning within the matrices ofvari ous cultural perspectives (p. 3) The answer to this question becomes clear, thanks to Cobern's excellent research and persuasivearguments. First, this research takes a humanistic approach in understanding what students and teachers think about Nature 'through the language and ideas voluntarily expressed' (p. I). The research used multi directional prompts and encouraged students and teachers to speak freely and at length in any directions they wished. This humanistic approach is stated clearly: '[T]he research seeks to illuminate some of the various ways in which students think aboutNature withoutjudging eventhe most unorthodox perspectives' (p. 14).Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 180 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -here ofexchange, and borrowing in debates between these disciplines, all the more so, as we shall see a little further on, as the analysis of the Central and East European transformations has also contributed to introduce into political science and sociology theoretical systematizations first formulated in economics. In addition to this opening up to the objects and theories of economics, the pseudo-'dilemma' ofsimultaneity produced, by a kind of feedback, another series of effects on transitology and the related research domains. Contrary to most expectations and predictions in the wake ofthe 1989 upheavals - affirmations that the 'dilemmas', 'problems' or 'challenges' of the transitions in Central and Eastern Europe ought to have been dealt with and resolved one after the other in sequence, in the manner of the more or less idealized trajectories of Great Britain or Spain (trajectories significantly enough promoted, far beyond the circles of scholars, as a 'model' of transition), and above all, contrary to the assumption that superposing a radical economic transformation upon a transition to democracy would make the whole edifice thoroughly unworkable, unstable or dangerous - it must be stated clearly out that the two processes, in their 'simultaneity', are not necessarily incompatible. This is one of the main findings stressed upon in several chapters of this book. 296 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Saponins are glycosides of triterpenes, steroids or steroidal alkaloids. They can be found in plants and marine organisms. Very diverse biological activities are ascribed to saponins and they play important roles in food, animal feedstuffs, and pharmaceutical properties. This volume provides a selection of recent work on saponins presented at a symposium in Pulawy, Poland, in 1999. Many different aspects are treated: analysis, separation, biological activities, relevant use in human and animal nutrition, and ecological significance. This book will be of use to researchers both in universities and industry. 308 pp. Englisch.