springer apr 1992 (42 Ergebnisse)

Taschenbuch. Zustand: Neu. Neuware -From Gauss to G|del, mathematicians have sought an efficientalgorithm to distinguish prime numbers from compositenumbers. This book presents a random polynomial timealgorithm for the problem. The methods used are fromarithmetic algebraic geometry, algebraic number theory andanalyticnumber theory. In particular, the theory of twodimensional Abelian varieties over finite fields isdeveloped.The book will be of interest to both researchers andgraduate students in number theory and theoretical computerscience.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 152 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Those interested in the relationships between psychological and physiological functions will again and again be impressed by the fact that great individual differences and large situational variability are manifested in psychophysiological data. Psychophysiology from a differential perspective has been an enduring theme throughout the history of personality and temperament research. However, the present book is the first to bear the word differential in its title. Actually, this monography is not only concerned with psychophysiological personality research, but with a much broader program of systematic investigation. Multivariate research methodology permits one to operationalize physiological response profiles, both with regard to lasting differences between persons and the discrimination of situations. In order to determine functional relationships between person characteristics and situational demands, that is, to determine the processes of stimulus-response mediation, one first needs to systemize these various sources of variance in assessment models and subsequently partition the observed covariance. A series of the author's own investigations in the Hamburg and Freiburg laboratories shows just how fruitful this research approach can be.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 416 pp. Englisch.

Buch. Zustand: Neu. Neuware -This book Computer Modelling of Seas and Coastal Regions is the first volume of the two volume proceedings of the International Conference on Computer Modelling of Seas and Coastal Regions and Boundary Elements and Fluid Dynamics, held in Southampton, U.K., in April 1992. The importance of accurate modelling of seas and coastal regions is empha sized by the need for predicting their behaviour under extreme conditions. Problems, such as pollution of these areas, have become a major interna tional concern and the related environmental problems need further study using techniques which can be used to determine the ways in which the water systems respond to different effects and try to minimize the damage. They can also lead to the development of early warning systems in combina tion with remote sensing equipment and experimental sampling techniques. Furthermore, once a disaster occurs, the model can be used to optimize the use of the available resources. The conference addresses coastal region modelling both under normal and extreme conditions, with special reference to practical problems, currently being experienced around the world. Many of the delegates are actively involved in the modelling of seas and coastal regions. This volume includes sections on waves, tides, shallow water circulation and channel flow, siltation and sedimentation, pollution problems, and computu tational techniques. The organizer would like to thank the International Scientific Advisory Committee, the conference delegates and all those who have actively sup ported the meeting. 540 pp. Englisch.

Buch. Zustand: Neu. Neuware -Co-published with Computational Mechanics Publications, UK. Papers presented at the Third International Conference on Computer Aided Technology Design in Composite Material Technology, University of Delaware, Newark, USA, May 1992. 652 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -From the very beginning, algebraic topology has developed under the influ ence of the problems posed by trying to understand the topological properties of complex algebraic varieties (e.g., the pioneering work by Poincare and Lefschetz). Especially in the work of Lefschetz [Lf2], the idea is made explicit that singularities are important in the study of the topology even in the case of smooth varieties. What is known nowadays about the topology of smooth and singular vari eties is quite impressive. The many existing results may be roughly divided into two classes as follows: (i) very general results or theories, like stratified Morse theory and (mixed) Hodge theory, see, for instance, Goresky-MacPherson [GM], Deligne [Del], and Steenbrink [S6]; and (ii) specific topics of great subtlety and beauty, like the study of the funda mental group of the complement in [p>2 of a singular plane curve initiated by Zariski or Griffiths' theory relating the rational differential forms to the Hodge filtration on the middle cohomology group of a smooth projec tive hypersurface. The aim of this book is precisely to introduce the reader to some topics in this latter class. Most of the results to be discussed, as well as the related notions, are at least two decades old, and specialists use them intensively and freely in their work. Nevertheless, it is impossible to find an adequate intro duction to this subject, which gives a good feeling for its relations with other parts of algebraic geometry and topology.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 284 pp. Englisch.

Buch. Zustand: Neu. Neuware -This book represents the proceedings of the First International Conference on Frontiers of Polymer Research held in New Delhi, India during January 20-25, 1991. Polymers have usually been perceived as substances to be used in insulations, coatings, fabrics, and structural materials. Defying this classical view, polymers are emerging as a new class of materials with potential applications in many new technologies. They also offer challenging opportunities for fundamental research. Recognizing a tremendous growth in world wide interest in polymer research and technology, a truly global '1st International Conference on Frontiers of Polymer Research' was organized by P. N. Prasad (SUNY at Buffalo), F. E. Karasz (University of Massachusetts) and J. K. Nigam (Shriram Institute for Industrial Research, India). The 225 participants represented 25 countries and a wide variety of academic, industrial and government groups. The conference was inaugurated by the Prime Minister of India, Mr. Chandra Shekhar and had a high level media coverage. The focus of the conference was on three frontier areas of polymer research: (i) Polymers for photonics, where nonlinear optical properties of polymers show great promise, (ii) Polymers for electronics, where new conduction mechanisms and photophysics have generated considerable enthusiasm and (iii) High performance polymers as new advanced polymers have exhibited exceptionally high mechanical strength coupled with light weight. 644 pp. Englisch.

Buch. Zustand: Neu. Neuware -Small and large telescopes are being installed all around the world. Astronomers have thus acquired better access to more modern equipment; not in the least to photometers, which are very important tools for the contemporary observer. This development of higher quality and more sensitive equipment makes it very necessary to improve the accuracy of the measurements. This guide helps the astronomer and astronomy student to improve the quality of their photometric measurements and to extract a maximum of information from their observations.The book is based on the authors' observing experience, spending numerious nights behind various instruments at many different observatories.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 288 pp. Englisch.

Buch. Zustand: Neu. Neuware -Emergent evolution combines three separate but related claims, whose background, origin, and development I trace in this work: firstly, that evolution is a universal process of change, one which is productive of qualitative novelties; secondly, that qualitative novelty is the emergence in a system of a property not possessed by any of its parts; and thirdly, that reality can be analyzed into levels, each consisting of systems characterized by significant emergent properties. In part one I consider the background to emergence in the 19th century discussion of the philosophy of evolution among its leading exponents in England - Charles Darwin, Herbert Spencer, T. H. Huxley, Alfred Russel Wallace, and G. J. Romanes. Unlike the scientific aspect of the debate which aimed to determine the factors and causal mechanism of biological evolution, this aspect of the debate centered on more general problems which form what I call the 'philosophical framework for evolutionary theory.' This considers the status of continuity and discontinuity in evolution, the role of qualitative and quantitative factors in change, the relation between the organic and the inorganic, the relation between the natural and the supernatural, the mind-body problem, and the scope of evolution, including its extension to ethics and morals.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 256 pp. Englisch.

Buch. Zustand: Neu. Neuware - This book presents case studies of the development of videotex in the UK, France, Germany, Italy, the Netherlands, Austria, Switzerland, Belgium, Denmark, Spain, Sweden, Ireland and the United States. These studies offer an excellent overview of the many factors and actors which might influence the outcome of complex innovation and implementation processes. Videotex is an interlocked innovation comprising not only innovations in the infrastructure (networks, hard- and software) but also an innovation in the supply of services and the user demand. If only one of these elements is absent the entire chain breaks down and the innovation process is hampered. In Europe two different implementation strategies can be distinguished: the Prestel and the Télétel scenarios. Until now, only Télétel has proved successful and only in one country: France. Given this state of affairs the following question is raised -- will the relaunch of videotex succeed in countries where the initial Prestel strategy failed Or will an open market approach, as followed in the United States, present a more direct route to the successful relaunch of videotex in the 1990s This collection presents a coherent up-to-date survey and analysis of videotex systems operating thoughout Europe. It analyses the use, success, limitations and future of videotex systems and related technologies. This collection will be of interest to computer, information and communication scientists, especially those who work in telecommunication and information management. It also offers an excellent case study of information technology policy analysis and as such will be of interest to social and political scientists specialising in technological policy.

Buch. Zustand: Neu. Neuware - 1 The baculoviruses.- 1.1 Introduction.- 1.2 Isolation and host range.- 1.3 Structure and classification.- 1.4 Baculovirus replication in vivo.- 1.5 Baculovirus replication in vitro.- 1.5.1 Baculovirus gene expression and replication.- 1.5.2 Baculovirus gene promoters.- 1.6 Genetic engineering of baculovirus insecticides.- 2 The development of baculovirus expression vectors.- 2.1 Introduction and historical perspective.- 2.2 The merits of the baculovirus expression system.- 2.2.1 Advantages.- 2.2.2 Disadvantages.- 2.3 General principles for inserting foreign genes into the baculovirus genome.- 2.4 Baculovirus transfer vectors.- 2.4.1 Polyhedrin promoter-based expression vectors.- 2.4.2 p10 promoter-based transfer vectors.- 2.4.3 Multiple expression vectors.- 2.4.4 Transfer vectors utilizing other baculovirus gene promoters.- 2.5 Selection of recombinant viruses.- 2.5.1 Selection of a polyhedrin-negative phenotype.- 2.5.2 Selection of f3-galactosidase-negative viruses.- 2.5.3 Recombinant virus selection using dot-blot hybridization.- 2.5.4 Screening for a positive phenotype.- 2.5.5 Enhancing the numbers of recombinant viruses.- 3 Processing of foreign proteins synthesized using baculovirus vectors in insect cells.- 3.1 Introduction.- 3.2 Glycosylation.- 3.3 Phosphorylation, acylation and amidation.- 3.4 Proteolytic processing.- 3.5 Cellular targeting and secretion.- 3.6 Tertiary and quaternary structure formation.- 3.7 Expression of viral genes.- 3.8 Expression of bacterial and fungal genes.- 3.9 Post-transcriptional processing.- 4 Construction of transfer vectors containing the foreign gene.- 4.1 Introduction.- 4.2 Isolation of foreign gene coding sequences.- 4.2.1 Some general guidelines.- 4.2.2 Isolation of DNA fragments from agarose gels.- 4.3 Modifying the ends of DNA molecules.- 4.3.1 Mung bean nuclease.- 4.3.2 Klenow fill-in.- 4.4 Preparation of the transfer vector.- 4.5 DNA ligations.- 4.6 Transformation of bacteria.- 4.7 Screening for recombinant baculovirus transfer vectors.- 4.7.1 Colony hybridization.- 4.7.2 Rapid isolation of bacterial plasmid DNA (mini-preps).- 4.8 Analysis of recombinant transfer vectors.- 4.9 Isolation of highly purified plasmid DNA (maxi-preps).- 5 Insect cell culture media and maintenance of insect cell lines.- 5.1 Introduction.- 5.2 Cell lines.- 5.3 Culture media.- 5.4 Preparation of culture media.- 5.4.1 Preparation of TC100/FCS growth medium.- 5.4.2 Preparation of Grace's (TNM-FH) growth medium.- 5.4.3 Preparation of 4.5 1 TC100 medium from powdered formula.- 5.4.4. Preparation of TC100 medium from individual ingredients.- 5.4.5 Specialized TC100 media.- 5.4.6 Alternative insect cell culture media.- 5.5 Glassware and disposable plasticware.- 5.5.1 Suggested cleaning regime for tissue culture glassware.- 5.6 Insect cell culture.- 5.6.1 Routine sub-culturing of Sf cell lines (monolayer cultures).- 5.6.2 Routine sub-culturing of Sf cells maintained in spinner cultures.- 5.7 A guide to Sf cell seeding densities for experimental work.- 5.8 Freezing, storage and recovery of insect cells in liquid nitrogen.- 5.8.1 Freezing and storage of cells in liquid nitrogen.- 5.8.2 Recovery of cells from liquid nitrogen.- 5.9 A guide to adapting cells to serum-free media.- 6 Propagation, titration and purification of AcMNPV in cell culture.- 6.1 Introduction.- 6.1.1 Safety considerations: general rules for working with baculoviruses.- 6.2 Infection of cells with virus for experimental work.- 6.2.1 Infection of Sf cells in monolayer culture.- 6.2.2 Infection of Sf cells in suspension culture.- 6.3 Titration of virus by plaque-assay.- 6.3.1 Standard plaque-assay.- 6.3.2 Plaque-assay of lacZ-positive viruses.- 6.4 Plaque-picking and plaque-purification.- 6.5 Amplification of virus stocks.- 6.5.1 To prepare a seed stock of virus from a plaque-pick.- 6.5.2 Preparation of an intermediate stock of virus.- 6.5.3 Preparation of a high-titre working stock of virus.- 6.6 Large-scale production of virus for the purifi.

Buch. Zustand: Neu. Neuware - Combination Immunotherapy: Immune Therapy of Human Cancers (R.P. Gale, A. Butturini). Clinical Applications of Combination Chemoimmunotherapy in Cancer: Combination of Fluorouracil and Interfon (R. Pazdur). Combination Approaches and Gene Therapy in the Treatment of AIDS and Other Infectious Diseases: Combination Therapies with Cytokines and AntiCytokines in Murine Opportunistic Infections (L. Romani et al.). Mechanism of Action and Synergy Between Drugs, Biological Response Modifiers and/or Vaccines in Combination Therapies: The Case for Synergy of Thymic Hormones and Interleukins in Immune Reconstitution (J.W. Hadden et al.). Immune Mediated Tumor Destruction (P.M. Sondel). Prospects and Future Directions Using Animal Models to Define Effective Combination Therapies with Biological Response Modifiers: Cancer Immunotherapy (L. Tentori et al.). 29 additional articles. Index.

Buch. Zustand: Neu. Neuware - Why has the energetics of organometallic species become an area of recognized importance What methods are available to obtain information on reaction enthalpies and bond `strengths' What other methods are likely to be used in the future Is the present thermochemical data bank satisfactory for our needs How accurately can we estimate the energetics of organometallic reactions Can theory offer reliable help Which are the main problems to be tackled by the experimentalist These are some of the questions addressed in the present book, which contains contributions by most of the leading groups in the area of organometallic thermochemistry.

Buch. Zustand: Neu. Neuware.

Buch. Zustand: Neu. Neuware -When the 13 founders of the American Psychiatric Association came together in 1844, hospitals were small, and the administrative aspects of a superinten dent's job were relatively minor compared with their size and complexity today. Since the turn of the century, administration-the art and the sci ence-has become a specialty of great importance, particularly in big business and government. Business recognizes fully that the success of organizational endeavors depends to a great extent on the talents and energies of top lead ers. As a result, industry spends huge sums of money to train promising young executives and offers generous salaries and benefits to entice them. Anyone who wants to invest in a business first asks: 'Who manages this organization, and is this management competitive in today's marketplace ' Although health is today a great industry, emphasis on the executive role has lagged behind that in the general business field. In mental health circles, the strong emphasis on one-to-one therapy has delayed a full appreciation of the influence of organization per se on patient care and treatment. Yet there 1 are now many signs of change. The popularization of behavioral science and the rise of social and community psychiatry have brought organizational con siderations forward. We are increasingly concerned with the human side of enterprise, with worker satisfaction, group dynamics, and organizational morale. Other flags have been unfurled.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 402 pp. Englisch.

Buch. Zustand: Neu. Neuware -Designed to advance understanding of the unique needs of high-functioning individuals with autism, this volume details the latest diagnostic and treatment approaches and analyzes the current conceptions of the neurological processes involved in autism.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 340 pp. Englisch.

Buch. Zustand: Neu. Neuware -Economics has been basically a study of the interactions between organizations, with some organizations being so small we only have one person in them. The internal organization of the largest hierarchies has indeed been looked at, but a good reason for working less on these organizations is that the internal reactions are much harder to understand. It is sensible to solve the problems we can solve and put the others off until later. The author's basic purpose here is to look at these larger hierarchical organizations, and develop a scientific account of them.In Economic Hierarchies, Organization and the Structure of Production Gordon Tullock examines the internal functioning and organization of the corporation. In the author's personal tradition, the book relies on narrative analysis rather than mathematical complexity to convey insights into the functioning of the corporation.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 210 pp. Englisch.

Buch. Zustand: Neu. Neuware -This second edition provides the basic, practical understanding of computer-based design that has led to the creation of a knowledge-driven approach. This approach, through constraint modelling, has been specifically developed to handle the problems of conflict present in the conceptual stages of a real design situation. 264 pp. Englisch.

Buch. Zustand: Neu. Neuware -Playback is the technique of rebroadcasting natural or synthetic signals to animals and observing their response. The ability to present a putative signal in isolation, without the potential confounding effects of other activities of the signaller, is the main reason for the depth and range of our knowledge of communication systems. To date, playback of sound signals has predominated, but playback of electric signals and even video playback of visual signals suggests that playback will become just as prevalent in studies of communication in other sensory modalities. This book is one of the outcomes of a workshop on playback held at Thombridge Hall in the Peak District National Park, England during August 1991. There were two reasons for organising the workshop. First, the considerable and lively debate in the literature about the design and analysis of playback experiments -the pseudoreplication debate -was in danger of generating more heat than light. A workshop forum seemed the obvious place to clarify and, if possible, resolve the debate. Second, with the number of new playback and analysis techniques increasing rapidly, it seemed an opportune moment to discuss these techniques and to review some rapidly developing areas of interest in sound communication.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 252 pp. Englisch.

Buch. Zustand: Neu. Neuware - Tropical forests affect climate, and the removal of the forests will change climate. Or not This book discusses basic questions on how far, if at all, tropical deforestation leads to climatic change. The question of this uncertainty is particularly addressed. One important consequence of the uncertainties of whether deforestation affects climate is how scientific findings best illuminate the policy-making process.

Taschenbuch. Zustand: Neu. Neuware -Modern Methods in Analytical Acoustics considers topics fundamental to the understanding of noise, vibration and fluid mechanisms. The series of lectures on which this material is based began by some twenty five years ago and has been developed and expanded ever since. Acknowledged experts in the field have given this course many times in Europe and the USA. Although the scope of the course has widened considerably, the primary aim of teaching analytical techniques of acoustics alongside specific areas of wave motion and unsteady fluid mechanisms remains. The distinguished authors of this volume are drawn from Departments of Acoustics, Engineering of Applied Mathematics in Berlin, Cambridge and London. Their intention is to reach a wider audience of all those concerned with acoustic analysis than has been able to attend the course.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 760 pp. Englisch.

Buch. Zustand: Neu. Neuware -The attribution of the Speculum Astronomiae to Albertus Magnus became a controversial issue only recently, when the great neo-Thomist historian Pierre Mandonnet suggested -- without any antecedents -- that the author was Roger Bacon rather than Albert. Mandonnet's theses were refuted by Lynn Thorndike and have since then been the subject of widespread discussion.The present historiographical case-study considers this debate in the light of an analysis of texts by Albert himself, as well as other important authors, such as Bacon, Bonaventura, Thomas Aquinas, Witelo, Campanus of Novara, and others, which shows how widespread the general concept of the influence of the stars and other astrological ideas to be found in the Speculum were. Most of the scientific ideas of the Middle Ages were based on principles derived from the notion of celestial influence and its consequences. The Speculum drew the fundamental outlines of this discipline into a theoretical and bibliographical introduction -- no small achievement -- and was consequently greeted with great interest and used as a standard reference book for many centuries. Set against the background of discussions taking place in the 1260s, within the Dominican Order as well as in the Faculties of Arts, Zambelli removes all doubt that the Speculum was written by Albert, possibly with some collaboration.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 372 pp. Englisch.

Buch. Zustand: Neu. Neuware -This handbook provides climatological data which can be used as an input for the design of passive solar buildings and solar systems. Solar radiation data are presented for 37 typical European locations, e.g.: -- monthly average global and direct solar irradiation for several surfaces (types of receiver, orientation and inclination), and -- cumulative frequency and utilizability curves of solar irradiance. Ambient temperature data are presented for 186 European locations as monthly average ambient temperatures and monthly degree-days at several base temperatures. A set of methods and algorithms is also given for the reconstitution of these parameters at places where little information is available. Examples of design tools are introduced. The Handbook has been developed within the framework of a European concerted action entitled EUFRAT. Reference is made to a set of computer programmes and data bases which complement the Handbook in a useful way. The Handbook can easily be used by anyone (scientist, engineer, student or even non-specialist) who needs climatic data for the design of systems.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 304 pp. Englisch.

Buch. Zustand: Neu. Neuware -For a number of years, I have been teaching and doing research in the economics of uncertainty, information, and insurance. Although it is now possible to find textbooks and books of essays on uncertainty and in formation in economics and finance for graduate students and researchers, there is no equivalent material that covers advanced research in insurance. The purpose of this book is to fill this gap in literature. It provides original surveys and essays in the field of insurance economics. The contributions offer basic reference, new material, and teaching supple ments to graduate students and researchers in economics, finance, and insurance. It represents a complement to the book of readings entitled Foundations of Insurance Economics - Readings in Economics and Finance, recently published by the S.S. Huebner Foundation of Insurance Education. In that book, the editors (G. Dionne and S. Harrington) disseminate key papers in the literature and publish an original survey of major contributions in the field.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 548 pp. Englisch.

Buch. Zustand: Neu. Neuware -Sensors and Sensory Systems for an Electronic Nose reviews the current state of progress in the development of an electronic instrument capable of olfaction. The instrument -- the so-called electronic nose -- has enormous potential for application in such areas as product flavor control and environmental monitoring.The book discusses the essential elements of an electronic nose, such as chemical sensors, signal processing, and pattern recoginiton techniques. It is also one of the first contributions to the new and exciting field of machine olfaction.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 340 pp. Englisch.

Buch. Zustand: Neu. Neuware -The object of this school, held at Cargese, Corsica (France) from August 12th to 24th 1991, was the presentation of the field of guided wave nonlinear optics in a comprehensive, coherent, and heuristic fashion. It seems appropriate that this school began with an historical introduction by Professor Nicolaas Bloembergen of Harvard, the acknowledged 'father' of nonlinear optics, in general, and concluded with a round table discussion headed by Dr. Eric Spitz, the Scientific Director of a multinational electronics company interested in developing industrial applications of guided wave nonlinear optics. The lectures covered both the theoretical framework of the field and applications to basic scientific research, optical communications and technical instrumentation. Specific topics developed included materials for guided wave nonlinear optics, nonlinear interactions using integrated optical guides, nonlinear surface waves, solitons, fiber nonlinear optics, ultra-fast coupler switching as well as the related topic of fiber and integrated optical lasers and amplifiers. Lectures have also been devoted to squeezed states, chaos and strange attractors. The subjects covered by the school underlines one of the major ways in which this field has evolved over the past thirty some odd years. The path from the original experiments with materials requiring mega-watt power lasers to the recent developments in guided wave configurations using milliwatt power diode lasers is marked by the conjunction of ever improving fundamental scientific comprehension and continuing technological developments.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 674 pp. Englisch.

Buch. Zustand: Neu. Neuware - Contributed to by leading experts, this book looks at the history of coppice woodlands, their physical environment, the different management techniques used and their effects on the flora and fauna. The implications of this for conservation is controversial and this is debated in a lively way in many of the chapters.

Buch. Zustand: Neu. Neuware - Nitrogen fixation is a key component of the nitrogen cycle, one of the most fundamental cycles in the biosphere. Conversion of atmospheric nitrogen into organic nitrogen compounds can be carried out only by certain bacteria and blue-green algae (cyanobacteria). Some nitrogen fixing bacteria live symbiotically with leguminous plants such as peas, beans, clover, and certain tropical trees in nodules on the plants' roots, while others live independently in the soil and aquatic habitats. By the activity of these microorganisms, the soil is enriched with the nitrogen required for plant growth and function. Thus the topic is of considerable practical as well as fundamental importance. In Biological Nitrogen Fixation, the leading researchers in nitrogen fixation from all over the world contribute up-to-the-minute general reviews on all aspects of the subject, from the molecular biology and genetics to the biochemistry, physiology, and ecology of nitrogen fixation. This compendium of current research is an indispensable reference for all involved in nitrogen fixation research, and of use to all who deal indirectly with the subject. It will also serve as a thoroughly up-to-date textbook for graduate students in microbiology, plant science, biochemistry, molecular biology, plant pathology, agronomy, and genetics.

Taschenbuch. Zustand: Neu. Neuware -Es bleiben nicht viele Wege und nicht viel Zeit, die sich immer deutlicher ab zeichnende globale Gefahrdung, vor der seit nun tiber 30 lahren gewarnt wird, abzuwenden. Oberstes Gebot muB eine bewuBtere Nutzung des nicht vermehr baren Naturraums sein, die auf sparsamen und schonenden Umgang mit den Ressourcen ausgerichtet ist, urn die Auswirkungen der bisherigen Schaden zu begrenzen und ktinftige Schaden moglichst gering zu halten. Dazu benotigen wir Bestandsaufnahmen, urn Ursachen, Art und AusmaB der Schadigungen abschatzen zu konnen. So, wie der Kriminologe versucht, die Hintergrtinde der des weltweiten Tat und den Tathergang zu ermitteln, mtissen die Auswirkungen fahrlassigen Umganges mit der Erde systematisch studiert werden. Bereits die bisher vorgenommenen Untersuchungen zu den Veranderungen auf unserem Planeten lieBen erkennen, daB die gesamte Erde als 'Tatort' zu betrachten ist. Die Erfassungsmethoden fUr die Umweltveranderungen wurden laufend verfei nert, aber das AusmaB und die Geschwindigkeit der Veranderungen haben sich kaum verringert. Zu viele, im einzelnen vielleicht unscheinbare Einzeltaten summieren sich zu den inzwischen untibersehbaren globalen Folgen. GroBe Hoffnungen werden nun z. B. an die neue Weltklimakonvention ge kntipft. Doch was kann der einzelne zur Verbesserung der Situation beitragen Wir denken, nur wenn jeder einzelne bei sich anfangt, in seiner unmittelbaren Umgebung, in seinem personlichen Verantwortungsbereich alles Handeln kri tisch zu prtifen und auf umweltschadigende Handlungen weitgehend zu ver zichten, kann es gelingen, die Folgen zu begrenzen.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 316 pp. Deutsch.

Taschenbuch. Zustand: Neu. Neuware -Dieses aus drei Einzelb{nden bestehende Werk bietet einenumfassenden ]berblick }ber das Gebiet des OperationsResearch (OR). Das Buch entstand aus einem Kurs derFernuniversit{t Hagen, die Autoren sind herausragendeauch international anerkannte Fachvertreter. Das Werk istLehrbuch und Nachschlagewerk gleichzeitig. Durch viele|konomische und geometrische Beispiele, durch ]bungsaufgabenund deren L|sungen (im Anhang) ist das Buch auch zumSelbststudium geeignet. Die Breite der behandelten ThemenSachwort- und Literaturverzeichnisse erm|glichen eineOrientierung }ber das gesamte Fachgebiet. In jedem Kapiteldes Buches werden neben den Grundallgen der relevantenTheorie auch die entsprechenden Verfahren (MethodenAlgorithmen) dargestellt. Teil 2 behandelt die Theorie derGraphen, Netwerkprobleme und deren L|sung, Transport- undverwandte Probleme sowie die ganzzahlige Optimierung.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 524 pp. Deutsch.

Taschenbuch. Zustand: Neu. Neuware -Ökologie und Ökonomie: Ihre Integration stellt eine wichtige Aufgabe für Ingenieure heute und in der Zukunft dar. Das Buch liefert eine zusammenfassende Darstellung der Analyse, Bewertung und Nutzung ökologischer Systeme durch den Menschen und seine Technik. Die Notwendigkeit der Einpassung ökonomischer Nutzung in die ökologischen Potentiale und die Grenzen dieser Nutzung werden deutlich gemacht. Der Leser erkennt sehr schnell, daß alle Systeme, auch Ökosysteme, nach relativ einfachen gemeinsamen Grundprinzipien arbeiten, daß jedes aber doch seine besondere Struktur hat, seine eigenen Schwachstellen und Nutzungsoptionen. Der Autor hat das Buch in einer Weise verfaßt, die auch dem Nichtfachmann die Problematik der Nutzung von ökologischen Systemen aufzeigt.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 284 pp. Deutsch.