springer jun 1983 (86 risultati)

Taschenbuch. Condizione: Neu. Neuware -aSpringer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 240 pp. Englisch.

Taschenbuch. Condizione: Neu. Neuware Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 496 pp. Englisch.

Buch. Condizione: Neu. Neuware -A research team from the United States has completed an examination of citizen participation experiments in seven European countries. The team included Donald Appleyard, Marc Draisen, David Godschalk, Chester Hartman, Janice Perlman, Hans Spiegel, John Zeisel, and ourselves. This book is a product of our joint efforts. Our studies are aimed at summarizing and sharing what can be learned from recent European efforts to enhance the effectiveness of local government through increased public involvement in the organization and management of public services and urban redevelopment. Almost a year was spent assembling the team, developing a shared framework for analysis and identifying appropriate case study cities. European and American public officials and citizen activists helped us assess the potential impact of such a study on current practice. A second year was spent visiting the European cities and preparing the case-study drafts. Finally, team members gathered in Washington, D. C. , with fifty American and European public officials, citizen activists, and scholars. A two-day symposium provided an exciting opportunity to present preliminary research findings and encourage an exchange of ideas between researchers, activists, and policymakers. The final versions of the case studies that appear in this book, along with several commentaries by symposium participants, are written especially for city officials and citizen activists. We have tried to translate the results of our scholarly inquiry into pragmatic suggestions for officials and activists.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 380 pp. Englisch.

Buch. Condizione: Neu. Neuware -In this book, I attempt to lay the axiomatic foundations of metaphysics by developing and applying a (formal) theory of abstract objects. The cornerstones include a principle which presents precise conditions under which there are abstract objects and a principle which says when apparently distinct such objects are in fact identical. The principles are constructed out of a basic set of primitive notions, which are identified at the end of the Introduction, just before the theorizing begins. The main reason for producing a theory which defines a logical space of abstract objects is that it may have a great deal of explanatory power. It is hoped that the data explained by means of the theory will be of interest to pure and applied metaphysicians, logicians and linguists, and pure and applied epistemologists. The ideas upon which the theory is based are not essentially new. They can be traced back to Alexius Meinong and his student, Ernst Mally, the two most influential members of a school of philosophers and psychologists working in Graz in the early part of the twentieth century. They investigated psychological, abstract and non-existent objects - a realm of objects which weren't being taken seriously by Anglo-American philoso phers in the Russell tradition. I first took the views of Meinong and Mally seriously in a course on metaphysics taught by Terence Parsons at the University of Massachusetts/Amherst in the Fall of 1978. Parsons had developed an axiomatic version of Meinong's naive theory of objects.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 216 pp. Englisch.

Buch. Condizione: Neu. Neuware - A historical and transcultural view of adolescence.- Concepts of adolescence; their applicability to normal and clinical samples.- Psychological changes in adolescence related to physical changes.- The psychobiology of developmental behavior disorders.- Influence of early exposure to steroid hormones on behavioral development.- The effects of a chronic illness on somatic growth and psychological development.- Adolescents and family disruption through marital separation.- Erotic overtures and sexual contacts; competence, rules, attitudes and problems.- Sex roles and coping with emotions.- Outpatient social skills training for youth in trouble; theoretical background, practice and outcome.- The implementation and evaluation of a residential social skills training program for youth in trouble.- Suicidal behaviour among adolescents.- How are we to deal with adolescents and their problems .- Epidemiology and the role of public health organizations.

Buch. Condizione: Neu. Neuware - 'A lake is the landscape's most beautiful and expressive feature. It is earth's eye; looking into which the beholder measures the depth of his own nature. The fluviatile trees next the shore are the slender eyelashes which fringe it, and the wooded hills and cliffs around are its overhanging brows.' 'A field of water betrays the spirit that is in the air. It is continually receiving new life and motion from above.' 'Nothing so fair, so pure, and at the same time so large, as a lake, perchance, lies on the surface ofthe earth. Sky water. It needs no fence. Nations come and go without defiling it. It is a mirror which no stone can crack, whose quicksilver will never wear off, whose gilding Nature continually repairs; no storms, no dust, can dim its surface ever fresh; - a mirror in which all impurity presented to its sinks, swept and dusted by the sun's hazy brush, - this the light dust-cloth, - which retains no breath that is breathed on it, but sends its own to float as clouds high above its surface, and be reflected in its bosom still.' (Henry David Thoreau: 'Walden; or Life in the Woods'. Fourth printing, April 1953, Ri!lehart & Company, New York).

Buch. Condizione: Neu. Neuware - Researching the potential of forest tree mycorrhizae.- Fine roots and sheathing mycorrhizas: their formation, function and dynamics.- The growth, activity and distribution of the fruit tree root system.- Root development and configuration in intensively managed radiata pine plantations.- Effects of N fertilisation on populations of fine roots and mycorrhizas in spruce humus.- Seasonal variation of growth and development of the roots of five second-year conifer species in the nursery.- Root distribution of four Vitis cultivars.- Root turnover and productivity of coniferous forests.- The distribution and productivity of fine roots in boreal forests.- Root development and plantation establishment success.- Root growth capacity: relationship with field root growth and performance in outplanted jack pine and black spruce.- Effect of restricted watering and its combination with root pruning on root growth capacity, water status and foot reserves of Pinus caribaea var. hondurensis seedlings.- Morphogenesis of root systems of seedlings and cuttings of Quercus robur L.- Some aspects of the development of the endodermis and cortex of Tilia cordata and Picea sitchensis.- When is the structural root system determined in Sitka spruce .- Differences between stem and root thickening at their junction in red pine.- The development of root systems analysed by growth rings.- Root architecture and tree stability.- Modelling root structure and stability.- The physiology of vesicular-arbuscular mycorrhizal roots.- Role of the host-arbuscule interface in the VA mycorrhizal symbiosis: ultracytological studies of processes involved in phosphate and carbohydrate exchange.- Studies of VA mycorrhizae in vitro: mycorrhizal synthesis of axenically propagated wild cherry (Prunus avium L.) plants.-The development of vesicular-arbuscular mycorrhizal infection in plant root systems.- The concept of succession in relation to the spread of sheathing mycorrhizal fungi on inoculated tree seedlings growing in unsterile soils.- Sequences and interactions of mycorrhizal fungi on birch.- Succession of mycorrhizal fungi on birch: infection of seedlings planted around mature trees.- Role of basidiospores as inocula of mycorrhizal fungi of birch.- Methods for synthesizing ectomycorrhizas and their effect on mycorrhizal development.- Apical meristems in mycorrhizal and uninfected roots of Calluna vulgaris (L.) Hull.- Responses of pine roots to E-strain ectendomycorrhizal fungi.- Role of Laccaria laccata in protecting primary roots of Douglas-fir from root rot.- First results of research on the competitivity of ectomycorrhizal fungi.- Ecto- and endomycorrhizal fungus associations with Quercus imbricaria L.- Effect of mycorrhizal inocula on the growth of Sitka spruce seedlings in different soils.- Changes in the mycorrhizal status of Sitka spruce following outplanting.- Inoculation of pines in a nursery with Pisolithus tinctorius and Thelephora terrestris in Korea.- The influence of mixed inocula on endomycorrhizal development.- Growth and survival of container-grown Pinus caribaea infected with various ectomycorrhizal fungi.- Influence of ectomycorrhizae on infectivity of Pythium-infested soils and substrates.- Effect of pesticides on ectomycorrhizae of Pinus sylvestris seedlings.- Mycorrhiza in some desert plant species in Algeria.- Environmental factors determining the distribution of Suillus luteus fructifications in a Pinus radiata grazing-forest plantations.- Nutrient inflows into apple roots.- Phosphorus absorption (32P) by apple trees under drip irrigation as influencedby the physical properties of the soil.- Responses of loblolly pine (mesophyte) and swamp tupelo (hydrophyte) seedlings to soil flooding and phosphorus.- Root surface/leaf area ratios in arctic dwarf shrubs.- Nutrient reserves in roots of fruit trees, in particular carbohydrates and nitrogen.- Nitrogen nutrition, photosynthesis and carbon allocation in ectomycorrhizal pine.- The structure and funct.

Taschenbuch. Condizione: Neu. Neuware -grund des Interesses getreten.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 200 pp. Deutsch.

Taschenbuch. Condizione: Neu. Neuware Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 260 pp. Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Preliminaries on L B P (Rn, d ).- The hardy-littlewood maximal operator.- Ap weights.- BMO(Rn,dx).- Calder¿n-Zygmund operators.- Calder¿n-Zygmund operators and pseudo-differential operators.- Calder¿n-Zygmund operators and Littlewood-Paley theory.- The Cauchy kernel on lipschitz curves.- Some techniques to generate new Calder¿n-Zygmund operators. 140 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Piecewise monotone functions.- Well-behaved piecewise monotone functions.- Property R and negative schwarzian derivatives.- The iterates of functions in S.- Reductions.- Getting rid of homtervals.- Kneading sequences.- An ¿Almost all¿ version of theorem 5.1.- Occurrence of the different types of behaviour. 220 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -a 240 pp. Englisch, Französisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -1.- 2.- 3.- 4.- 5.- Errata. 336 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware 496 pp. Englisch, Französisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -On degeneration of projective curves.- Varietes rationnelles et unirationnelles.- Conic bundles on non-rational surfaces.- Moduli of surfaces of general type.- On a proof of Torelli's theorem.- Two examples of algebraic threefolds whose hyperplane sections are Enriques surfaces.- On the Brill-Noether theorem.- Properties of Arakelov's intersection product.- On nodal curves.- About the enumeration of contacts.- Un probleme du type Brill-Noether pour les fibres vectoriels.- On the construction of rational surfaces with assigned singularities.- Postulation des courbes gauches.- Projective geometry of elliptic curves.- Linkage of general curves of large degree.- Some problems and results on finite sets of points in n.- Homogeneous bundles in characteristic p.- The group of sections on a rational elliptic surface.- On the Kodaira dimension of the Siegel modular variety.- Generalized hilbert functions of Cohen-Macaulay varieties.- Some curves in 3 are set-theoretic complete intersections.- Constructing enriques surfaces from quintics in P K 3 .- Prym surfaces and a Siegel modular threefold. 424 pp. Englisch, Französisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This work was written during my visits at CORE (Belgium), at the Faculty of Economics and Politics in Cambridge (England), and at the Department of Mathematics at the ETH in ZUrich. I wish to thank J.H. Dr~ze (CORE) for most help ful suggestions, and I am indebted to H. BUhlmann (ETH) for his advice and for encouragement. The comments by M. Granzio1, M. Janssen and by anonymous referees were very useful. However, I assume the responsibility for remaining errors. I am grateful to R. Boller, I. Lather and M. Urfer for their careful typing of the manuscript. Support by the SWiss National Science Foundation is acknowledged. An earlier version of this work was presented at the European Meeting of the Econometric Society 1981 in Amsterdam. In 1981 it was accepted as a 'Habi1itations schrift' in Mathematical Economics by the Department of Mathematics at the ETH in ZUrich. CONTENTS Introduction 1 Part I: The General Model 8 1.1. Formulation of the General Model 8 1.1.1. General Properties 8 1.1.2. The Consumer 10 1.1.3. The Producer 14 1.1.4. The Public Sector 16 Equilibrium 1.2. 104 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -THE REAL THING by Isaac Asimov Back in 1939, when I was still a teenager, I began to write (and publish) a series of stories about robots which, for the first time in science fiction, were pictured as having been deliberately engineered to do their job safely. They were not intended to be creaky Gothic menaces, nor outlets for mawkish sentiment. They were simply well-designed machines. Beginning in 1942, I crystallized this notion in what I called 'The Three Laws of Robotics' and, in 1950, nine of my robot stories were collected into a book, I, Robot. I did not at that time seriously believe that I would live to see robots in action and robotics becoming a booming industry . Yet here we are, better yet, I am alive to see it. But then, why shouldn't they be with us Robots fulfil an important role in industry. They do simple and repetitive jobs more steadily, more reliably, and more uncomplainingly than a human being could - or should. Does a robot displace a human being Certainly, but he does so at a job that, simply because a robot can do it, is beneath the dignity of a human being; a job that is no more than mindless drudgery. Better and more human jobs can be found for human beings - and should. 324 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book is an edited version of part of the teaching text used for the Open University's undergraduate course 'T283 Introductory Electronics', first presented in 1980. The original text was pro duced by a course team of nine authors and nine support staff. The team was also responsible for student experimental kits, television and radio programmes. The approach adopted by the course team was to try and teach, where possible, through specification of the problem rather than through discussion of the operation of a selection of available devices and components; since this leads more naturally to modem design strategies such as 'top-down'. The emphasis in the book on the solution of combinational and sequential logic problems by the truth tables and ROMs, rather than logic gates and mapping techniques, illustrates this approach. The book covers topics ranging from logic to microprocessor memory systems and is intended for students with a background in analogue electronics who wish to update their knowledge to include digital electronic systems. Chapter 2 introduces the basic ideas of combinational logic design; truth tables, ROMs, logic gates and Boolean algebra. Chapter 3 deals with sequential logic, and shows how one can design binary and decimal counters and use these to produce a system controller. Chapter 4 examines the system elements needed to interconnect analogue and digital systems. 196 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware 348 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -I Piecewise constant orthogonal basis functions.- II Operations on square integrable functions in terms of PCBF spectra.- III Analysis of lumped continuous linear systems.- IV Analysis of time delay systems.- V Solution of functional differential equations.- VI Analysis of non-linear and time-varying systems.- VII Optimal control of linear lag-free systems.- VIII Optimal control of time-lag systems.- IX Solution of partial differential equations (PDE) [W55].- X Identification of continuous lumped parameter systems.- XI Parameter identification in distributed systems. 268 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Food, Fibre and Fertilizers.- A 1 Food and fibre needs of the world.- A 2 Improving soil fertility.- A 3 The contribution of fertilizers.- Social and Environmental Benefits of Fertilizers.- B 1 Farming profit and the rural standard of living.- B 2 Fertilizers and the competition for land.- B 3 Fertilizers and the environment.- Alternatives to Fertilizers.- C 1 Legumes versus fertilizer nitrogen.- C 2 Farm manures, composted town refuse and sewage sludge.- C 3 Alternative farming systems avoiding the use of fertilizers.- C 4 Special properties of 'organically' grown foods.- Crop Quality.- D 1 Definition of crop quality.- D 2 Effects of nitrogenous, phosphatic and potassic fertilizers on quality.- D 3 Cereals.- D 4 Root crops.- D 5 Oilseeds.- D 6 Fruit and vegetables.- D 7 Pests and diseases.- D 8 Frost and drought.- The Effect of Fertilizers on Forage Crops and Animal Health.- E 1 Botanical composition of grassland.- E 2 The nutritional value of forages.- E 3 Yield and quality of animal products.- E 4 Animal health and fertility.- Fertilizers In Forestry.- F 1 Wood quality.- F 2 Fertilization and the environment.- Fertilizers and the Soil.- G 1 The effect of fertilizers on soil nutrient supply.- G 2 The effect of fertilizers on soil organic matter.- G 3 Fertilizers and the soil flora and fauna.- G 4 Fertilizers versus organic manures and wastes.- Water Quality.- H 1 Fate of fertilizer constituents.- H 2 Sources of nitrogen and phosphorus in water.- H 3 Effect of nutrient losses on water.- H 4 Nutrient contents of surface and ground water.- Health Aspects.- J 1 Recommended safe levels of N in drinking water and the consequences of excess nitrate.- J 2 Methaemoglobinaemia in Europe.- J 3 Fertilizers, food crops and human health.- J 4 The effect of the primarynutrients, N, P and K on human health.- J 5 Calcium, magnesium, sodium and sulphur in human health.- J 6 Micronutrients and human health.- J 7 Heavy metals and human health.- J 8 Nitrosamines and nitrogen fertilizers.- J 9 Nitrogen fertilizers and stratospheric ozone.- Energy.- K 1 Energy in agriculture.- K 2 Fertilizer energy.- Miscellaneous.- L 1 International organisations concerned in the environmental aspects of fertilizer use.- L 2 Sources of information on environmental aspects of fertilizer manufacture. 112 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware 168 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Description of multivariable coupled systems.- Design of rejection to disturbances for single variable control systems.- Difficulty of analysis of multivariable coupled systems.- Some general principles for decoupling design.- Some special decoupling design methods.- Some realization problems in decoupling design.- The Bristol-Shinskey method.- Distillation column control. 492 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This volume contains most of the talks presented at the Journ~es de la Soci~t~ Math~ma~ique de France entitled 'Rhythms in Biology and other fields of application -Determi nistic and Stochastic Approaches' held in Luminy from the 14th th to the 18 of September 1981. The aim of our meeting was to bring together scien tists from different disciplines to discuss a common topic and to stimulate exchanges between participants. We hope that this goal was reached. This volume is divided into four chapters. In each one the papers are arranged in alphabetical order by first author. Chapters one and two contain papers devoted to descrip tion or modelling of rhythmic biolog.ical phenomena. Chapters three and four deal with models for the study of rhythms invol ving the use of deterministic or stochastic tools capable of fruitful transfer to Biology. We are pleased that these Proceedings appear in a series which constitutes an interface between Biologists and Mathema ticians. We are indebted to all who provided us with their help, particularly the Centre International de Rencontres Math~matiques (C.I.R.M.) at Luminy, the Soci~t~ Mathematique de France (S.M.F.), the Delegation aux Relations Universitaires Internationales (D.R.U.I.) and the Laboratoire d'Informatique et de Math~matiques Appliquees de Grenoble (I.M.A.G.). Special thanks are due to Mrs. A. Litman for her dedi cation and her efficiency throughout the organization of this meeting. G~enobie, Vecembe~ 1982. 416 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -On semantic foundations for applicative multiprogramming.- An axiomatization of the intermittent assertion method using temporal logic.- Topological characterizations of infinite behaviours of transition systems.- Linear time and branching time semantics for recursion with merge.- Processes and a fair semantics for the ADA rendez-vous.- Conditional dependencies for horizontal decompositions.- On the relationship of CCS and CSP.- Behavioural equivalence relations induced by programming logics.- Lower bounds for constant depth circuits for prefix problems.- Test sets for morphisms with bounded delay.- Symmetric and economical solutions to the mutual exclusion problem in a distributed system.- Ambiguity and decision problems concerning number systems.- On the observational semantics of fair parallelism.- An O(N4) algorithm to construct all Voronoi diagrams for k nearest neighbor searching.- Algebraic languages and polyomnoes enumeration.- On the number of equal-sized semispaces of a set of points in the plane.- Algebraic specifications with generating constraints.- Wythoff games, continued fractions, cedar trees and Fibonacci searches.- Initial index: A new complexity function for languages.- Modular compiler descriptions based on abstract semantic data types (Extended Abstract).- Polynomial-time factorization of multivariate polynomials over finite fields.- Processes of place/transition-nets.- A hardware semantics based on temporal intervals.- Lower bounds for solving undirected graph problems on VLSI.- Concurrent probabilistic program, or: How to schedule if you must.- Computation times of NP sets of different densities.- Rewrite methods for clausal and non-clausal theorem proving.- Complexity of infinite trees.- Incremental construction of unification algorithms in equational theories.- Tree automata and attribute grammars.- Effectively given spaces.- A note on intersections of free submonoids of a free monoid.- A fast sorting algorithm for VLSI.- On the composition of morphisms and inverse morphisms.- On the group complexity of a finite language.- Reasoning with time and chance.- Factoring multivariate integral polynomials.- On the study data structures: Binary tournaments with repeated keys.- Minimizing width in linear layouts.- Proving precedence properties: The temporal way.- An algebraic semantics for busy (data-driven) and lazy (demand-driven) evaluation and its application to a functional language.- Searchability in merging and implicit data structures.- Strong abstract interpretation using power domains.- Testing equivalences for processes.- Specification-oriented semantics for communicating processes.- Complexity classes of alternating machines with oracles.- A propos d'une conjecture de F. Dejean sur les r¿titions dans les mots.- Parallel dictionaries on 2¿3 trees.- Varietes de semigroupes et mots infinis.- Arbres et hierarchies de concatenation.- A multiprocess network logic with temporal and spatial modalities.- Enumeration of success patterns in logic programs.- Immunity.- Power domains and predicate transformers: A topological view.- Recognition and isomorphism of two dimensional partial orders.- On the simulation of many storage heads by a single one.- Synchronisation trees.- Cutting and partitioning a graph after a fixed pattern.- Context-free controlled etol systems.- Referees for ICALP-83. 748 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Proceedings of the Conference on Control Theory for Distributed Parameter Systems, Held at the Chorherrenstift Vorau, Styria, July 11-17, 1982 260 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Preliminaries on L B P (Rn, d ).- The hardy-littlewood maximal operator.- Ap weights.- BMO(Rn,dx).- Calder¿n-Zygmund operators.- Calder¿n-Zygmund operators and pseudo-differential operators.- Calder¿n-Zygmund operators and Littlewood-Paley theory.- The Cauchy kernel on lipschitz curves.- Some techniques to generate new Calder¿n-Zygmund operators. 140 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Piecewise monotone functions.- Well-behaved piecewise monotone functions.- Property R and negative schwarzian derivatives.- The iterates of functions in S.- Reductions.- Getting rid of homtervals.- Kneading sequences.- An ¿Almost all¿ version of theorem 5.1.- Occurrence of the different types of behaviour.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 220 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -1.- 2.- 3.- 4.- 5.- Errata.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 336 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -On degeneration of projective curves.- Varietes rationnelles et unirationnelles.- Conic bundles on non-rational surfaces.- Moduli of surfaces of general type.- On a proof of Torelli's theorem.- Two examples of algebraic threefolds whose hyperplane sections are Enriques surfaces.- On the Brill-Noether theorem.- Properties of Arakelov's intersection product.- On nodal curves.- About the enumeration of contacts.- Un probleme du type Brill-Noether pour les fibres vectoriels.- On the construction of rational surfaces with assigned singularities.- Postulation des courbes gauches.- Projective geometry of elliptic curves.- Linkage of general curves of large degree.- Some problems and results on finite sets of points in n.- Homogeneous bundles in characteristic p.- The group of sections on a rational elliptic surface.- On the Kodaira dimension of the Siegel modular variety.- Generalized hilbert functions of Cohen-Macaulay varieties.- Some curves in 3 are set-theoretic complete intersections.- Constructing enriques surfaces from quintics in P K 3 .- Prym surfaces and a Siegel modular threefold.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 424 pp. Englisch.