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  • 1980-1984  (24)
  • 1975-1979  (17)
  • 1935-1939
  • Dordrecht : Springer  (41)
  • Social sciences.  (41)
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  • 1
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400955608
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Environmental Resource Management Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: I -- 1 Minerals in History -- 2 National Mineral Policy -- 3 Environment -- 4 Mineral Economics -- 5 Energy -- 6 Exploration -- 7 Mineral Production Technology -- 8 Crystal Gazing -- II -- 9 METALS -- 10 Non-Metals -- Annotated Bibliography.
    Abstract: This volume discusses the mineral resources upon which modern civiliza­ tion is built. Take away these minerals and humanity will rapidly return to the stone age, with its greatest concern the depletion of flint (also a mineral). It would, of course, result in about a 99% reduction in population. In other words, approximately 99% of the worlds' population is dependent on minerals for its existence. That is a pretty strong statement, but how many have even seen a travois? Without minerals, pack animals, rafts, rowboats, sail boats, sledges, and the backs of man would be the only forms of transport. Sufficient food could not be transported, nor could it be grown on our tired soils without tractors and fertilizer. Even in the more fertile tropics where nearly half of the population is now suffering from malnutrition, crops are dependent on "miracle" grains that require mechanization and mineral fertilizers. Modern buildings cannot operate without electricity and, without mineral fuels, few people in the northern latitudes would survive the first winter.
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  • 2
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789401169431
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Environmental Resource Management Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: I -- Soil Profile Descriptions -- Soil Maps -- Laboratory Analyses -- Soil Taxonomy -- Computerized Groupings of Soils -- Projects -- Photographs -- First Exam -- II -- Engineering Applications -- Waste Disposal -- Agricultural Land Classification -- Erosion Control -- Yield Correlations -- Farm Planning -- Community Planning -- III -- Soil Potentials -- Soil Variability -- Sequential Testing -- Land Uses and Soils -- Tragedy of the Commons -- Strategic Implications -- Military Campaigns -- Research -- Predictions -- Soils Tours -- Slide Sets -- Final Exam -- Evaluation.
    Abstract: The success of the book Soils and the Environment imagination in the applications of soil surveys, illustrates the need for further, more detailed toward the end of improving productivity and information about soil survey interpretations (uses efficiency in the use of soils and the environment. of soil surveys), especially for laypersons, teachers, Although laypersons, teachers, and students are the and students. Much information about soils and primary groups addressed by this Field Guide, the environment is secluded in offices of various other people involved with using soil surveys are agencies and institutions and thus is not readily (or will be) agriculturalists, agronomists, assessors, available to the people who need it. Techniques for botanists, conservationists, contractors, ecologists, finding and using the information are also not well economists, engineers, extension workers, fores­ known, so there is great need for this Field Guide ters, geologists, groundwater experts, planners, to Soils and the Environment to provide teachers politicians, public health officials, range managers, and learners with exercises that will give them recreationists, soil scientists, wildlife specialists, and many others. This Field Guide complements practice leading to confidence in the manipulation and enhances the book Soils and the Environment and utilization of soil survey data. In a sense, all published in 1981. of us are (or should be) learners and teachers in the use of soil survey information. This Field Guide DONALD R.
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  • 3
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400955547
    Language: English
    Pages: Online-Ressource (VIII, 166 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Population and Community Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Predators and predation -- 2 Predation theory -- 3 Clearing the decks -- 4 Field studies -- 5 Self-limitation of prey and predator populations -- 6 Age and size structure in predator and prey populations -- 7 Prey refugia -- 8 The functional response: the influence of predatory behavior upon dynamics -- 9 Spatial structure in prey populations -- 10 Predation and population cycles -- 11 The evolution of predator-prey systems -- 12 Predation and the ecological community 140 -- Appendix of scientific names.
    Abstract: When assuming the task of preparing a book such as this, one inevitably wonders why anyone would want to read it. I have always sympathized with Charles Elton's trenchant observation in his 1927 book that 'we have to face the fact that while ecological work is fascinating to do, it is unbearably dull to read about . . . ' And yet several good reasons do exist for producing a small volume on predation. The subject is interesting in its own right; no ecologist can deny that predation is one of the basic processes in the natural world. And the logical roots for much currently published reasoning about predation are remarkably well hidden; if one must do research on the subject, it helps not to be forced to start from first principles. A student facing predator-prey interactions for the first time is confronted with an amazingly diverse and sometimes inaccessible literature, with a ratio of wheat to chaff not exceeding 1: 5. A guide to the perplexed in this field does not exist at present, and I hope the book will serve that function. But apart from these more-or-Iess academic reasons for writing the book, I am forced to it by my conviction that predators are important in the ecological scheme. They playa critical role in the biological control of insects and other pests and are therefore of immediate economic concern.
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  • 4
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400957534
    Language: English
    Pages: Online-Ressource (VII, 208 p) , digital
    Edition: Second Edition
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Engineering Description of Rocks -- 1.1 Rock testing -- 1.2 Uniaxial or unconfined strength -- 1.3 Empirical field and laboratory tests -- 1.4 Porosity and permeability -- 1.5 Discontinuous rock -- 2 Stress and Strain -- 2.1 Stress at a point -- 2.2 Pore pressure and effective stress -- 2.3 Strain at a point -- 2.4 Representation of stress and strain -- 2.5 Relation between stress and strain -- 2.6 Geostatic stresses -- 2.7 Measurement of in situ stress -- 3 Rock Deformation -- 3.1 Rock tests in compression -- 3.2 Rock deformation in compression -- 3.3 Mechanics of microfracture -- 3.4 Rock macrofracture -- 3.5 The complete rock deformation curve -- 4 Rock Strength and Yield -- 4.1 Rock strength criteria -- 4.2 Yield criteria -- 4.3 The critical state concept -- 4.4 Triaxial testing -- 4.5 Axial and volumetric strain data -- 4.6 The Hvorslev surface in rocks -- 5 Time Dependency -- 5.1 Creep strain -- 5.2 Phenomenological models of creep -- 5.3 Time-dependent deformation -- 5.4 Time-dependent strength reduction -- 5.5 Cyclic loading -- 5.6 Rapid loading -- 6 Discontinuities in Rock Masses -- 6.1 Discontinuity measurement -- 6.2 Discontinuity orientation data -- 6.3 Shear resistance of a rock containing a discontinuity -- 6.4 Shear resistance of a discontinuity -- 6.5 A critical state model for rock discontinuity strength -- 6.6 Measurement of discontinuity shear resistance -- 7 Behaviour of Rock Masses -- 7.1 Discontinuity frequency -- 7.2 Rock mass classification systems -- 7.3 Rock mass strength criterion -- 7.4 The relevance of rock mass strength -- References -- Author Index.
    Abstract: The first edition of this book was received more kindly than it deserved by some, and with some scepticism by others. It set out to present a simple, concise and reasonably comprehensive introduction to some of the theoretical and empirical criteria which may be used to define rock as a structural material. The objectives - reinforced by the change in title - remain the same, but the approach has been changed considerably and only one or two sections have been retained from the first edition. The particular aim in this edition is to provide a description of the mechanical behaviour of rocks, based firmly upon experimental data, which can be used to explain how rocks deform, fracture and yield, and to show how this knowledge can be used in design. The major emphasis is on the behaviour of rocks as materials, although in the later chapters the behaviour of discontinuities in rocks, and the way in which this can affect the behaviour of rock masses, is considered. If this edition is an improvement on the first edition it reflects the debt lowe to numerous people who have attempted to explain the rudiments of the subject to me. I should like to thank Peter Attewell and Roy Scott in particular. I should also like to thank Tony Price and Mike Gilbert whose work at Newcastle I have used shamelessly.
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  • 5
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789401180481
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Ecology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Conditions for life -- 1.1 Radiant energy -- 1.2 The atmosphere -- 2 Radiation coupling -- 2.1 Introduction -- 2.2 Plant responses to light -- 3 Coupling through boundary layers -- 3.1 Electrical analogues -- 3.2 Coupling through resistance chains -- 3.3 Physiologically-influenced resistances -- 3.4 Micrometeorological stomatal resistance -- 4 Heat and water exchange at plant surfaces -- 4.1 Introduction -- 4.2 Energy balance -- 4.3 Calculations -- 5 Field observations -- 5.1 Structure of vegetation -- 5.2 Vegetation height -- 5.3 Leaf survival and design -- Appendix 1 Specific heats -- Appendix 2 Physical constants -- Appendix 3 Thermocouple data -- Appendix 5 Saturated vapour pressure and black body radiation -- Appendix 6 Useful formulae -- Appendix 7 Symbols and abbreviations -- Appendix 8 Units -- Appendix 9 Metric multiples and submultiples -- References.
    Abstract: In this small book I have tried to confine myself to the absolute necessities in a field which requires a knowledge of both biology and physics. It is meant as a primer for biological undergraduates. I hope it will lead some of them to further, more advanced, study. It has not been easy to present the subject in so few pages, and I am aware of many omissions. I hope readers will agree that it is best to concentrate on a small number of topics, which together constitute an essay on plant-atmosphere relationships. Advanced students will be able to take the subject further if they look up some of the references. Text books that I particularly recommend are those by Monteith [38] and Campbell [lOO]. If the reader intends to carry out research investigations he should also consult Fritschen and Lloyd [105] for an introduction to instrumentation in environmental biophysics.
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  • 6
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789401169387
    Language: English
    Pages: Online-Ressource (XIII, 178 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Environmental Resource Management Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Soil Profile Descriptions -- Soil Horizons -- Color -- Texture -- Structure -- Consistence -- Reaction -- Boundary -- 3 Laboratory Analyses -- Soil Fertility Tests -- Engineering Soils Tests -- Soil Classification Lab Analyses -- Soil Test Kit -- 4 Soil Classification -- Nomenclature -- Maps -- Groupings of Soils -- 5 Computerized Data Processing -- SCS Form 5 -- 6 Engineering Applications -- Community Development -- Waste Disposal -- 7 Agricultural Land Classification -- Land Capability -- Productivity Index -- Land Economics -- Land Use -- 8 Erosion Control -- Soil-Loss Equation -- Evidence of Soil Erosion -- Canadarago Computer Study -- 9 Yield Correlations -- Estimated Yields -- Soil Correlations -- National Programs -- Crop Responses -- Experiment Design -- Sequential Testing -- 10 Archeological Considerations -- New York -- Mesa Verde -- Phoenix -- Tikal -- Sardis -- Mexico City -- Negev Desert -- Rajasthan Desert -- 11 Planning for the Future -- FAO World Soil Map -- Soil Taxonomy -- CRIES -- Benchmark Project -- Soil Quantification -- Conclusions -- Appendix 1 Conversion Factors for U.S. and Metric Units -- Appendix 2 Glossary -- References.
    Abstract: As we enter the last decades of the twentieth century, many persistent and perplexing problems continue to afflict humankind. Thus it is appropriate to address, in a new group of books, two of the monumental issues that haunt people throughout the world. Soils and the Environment by Professor Gerald W. Olson is the first book in this new publish­ ing program on Environment, Energy, and Society. The purpose of all these books will be to explore the many interrelated facets of these topics and to provide guidance for deal ing with problems and offering ideas for their solutions. Environment and energy are twin problems that occupy what many believe to be opposite sides of a two-headed coin. They are often viewed as being antithetical and incompatible. The various books in this program will try to place in perspective the options that are available to those who design policy and plan and manage societal matters. Typical of books being developed currently are ones on coal resources, environmental geoscience, environmental pollution, land-use planning, nuclear energy, mineral resources, and water resources. However, because soils are at the very heart of civilization and provide the building block for human sustenance, it is fitting to inaugurate this series with Dr. Olson's timely analysis of soils. Unfortu­ nately, these most vital resources seen. to have low priority in many farming enterprises, urbanization projects, deforestation schemes, and mining and developmental terrain changes.
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  • 7
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400959255
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Population and Community Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Food webs -- 1.1 What and why? -- 1.2 Where? -- 1.3 How? -- 2 Models and their local stability -- 2.1 Introduction -- 2.2 Models -- 2.3 Stability -- 2.4 Summary -- Appendix 2A: Taylor’s expansion -- Appendix 2B: An example of calculating eigenvalues -- Appendix 2C: Jacobian matrices -- 3 Stability: other definitions -- 3.1 Introduction -- 3.2 Global stability -- 3.3 Species deletion stability -- 3.4 Stability in stochastic environments -- 3.5 Other stability criteria -- 3.6 Summary: models and their stabilities — Is there a best buy? -- 4 Food web complexity I: theoretical results -- 4.1 Introduction -- 4.2 Bounds on food web complexity: local stability -- 4.3 Complexity and stability under large perturbations -- 4.4 Summary of theoretical results -- 5 Food web complexity II: empirical results -- 5.1 Direct tests -- 5.2 Indirect tests -- 5.3 Summary -- 6 The length of food chains -- 6.1 Introduction -- 6.2 Hypothesis A: Energy flow -- 6.3 Hypothesis B: Size and other design constraints -- 6.4 Hypothesis C: Optimal foraging; why are food chains so long? -- 6.5 Hypothesis D: Dynamical constraints -- 6.6 Summary -- Appendix 6A: Drawing inferences about food web attributes -- 7 The patterns of omnivory -- 7.1 Models of omnivory -- 7.2 Testing the hypotheses -- 7.3 Summary -- 8 Compartments -- 8.1 Reasons for a compartmented design -- 8.2 Testing the hypotheses: habitats as compartments -- 8.3 Testing the hypotheses: compartments within habitats -- 8.4 Four comments -- 8.5 Summary -- 9 Descriptive statistics -- 9.1 Predator—prey ratios -- 9.2 The number of species of prey that a species exploits and the number of species of predator it suffers -- 9.3 Interval and non-interval food webs -- 9.4 Summary -- 10 Food web design: causes and consequences -- 10.1 Introduction -- 10.2 Causes -- 10.3 Consequences -- 10.4 Summary.
    Abstract: Often the meanings of words are changed subtly for interesting reasons. The implication of the word 'community' has changed from including all the organisms in an area to only those species at a particular trophic level (and often a taxonomically restricted group), for example, 'bird-community'. If this observation is correct, its probable cause is the dramatic growth in our knowledge of the ecological patterns along trophic levels (I call these horizontal patterns) and the processes that generate them. This book deals with vertical patterns - those across trophic levels -and tries to compensate for their relative neglect. In cataloging a dozen vertical patterns I hope to convince the reader that species interactions across trophic levels are as patterned as those along trophic levels and demand explanations equally forcefully. But this is not the only objective. A limited number of processes shape the patterns of species interaction; to demonstrate their existence is an essential step in understanding why ecosystems are the way they are. To achieve these aims I must resort to both mathematical techniques to develop theories and statistical techniques to decide between rival hypotheses. The level of mathematics is likely to offend nearly everyone. Some will find any mathematics too much, while others will consider the material to be old, familiar ground and probably explained with a poor regard for rigour and generality.
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  • 8
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789401170659
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Electrical / Computer Science and Engineering Series
    Series Statement: Van Nostrand Reinhold Electrical/Computer Science and Engineering Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: I The PN Junction -- A. The Need to Understand Low Frequency Diode Behavior -- B. Silicon — The Semiconductor -- C. The PN Depletion Zone -- D. Junction Potential -- E. Diffusion and Drift Currents -- F. Rectification and the I-V Law -- G. Depletion Zone Width Modulation — The Depletion C(V) Law -- H. Reverse Voltage Breakdown -- References -- Questions -- II PIN Diodes and the Theory of Microwave Operation -- A. The PIN Diode — An Extension of the PN Junction -- B. Microwave Equivalent Circuit -- C. High RF Power Limits -- References -- Questions -- III Practical PIN Diodes -- A. Basic Parameters — I Region Thickness and Area -- B. Table of Typically Available PIN Diodes -- C. Definition of Characteristics -- References -- Questions -- IV Binary State Transistor Drivers -- A. What The Driver Must Do -- B. The Driver as a Logic Signal — Power Supply Buffer (TTL Compatibility) -- C. Switching Speed -- D. High Power Reverse Bias (Enhanced) Leakage Current Supply -- E. Fault Detection Circuits -- F. Complementary Drivers -- References -- Questions -- V Fundamental Limits of Control Networks -- A. Introduction -- B. The Simple Loss (or Isolation) Formula -- C. The General Three-Port SPST Equivalent Circuit -- D. Switching Limits -- E. Duplexing Limits -- F. Phase Shifting Limits -- G. Summary -- References -- Questions -- VI Mathematical Techniques and Computer Aided Design (CAD) -- A. Introduction -- B. CAD Mathematical Analysis Approaches -- C. FORTRAN Computer Programming -- References -- Questions -- VII Limiters and Duplexers -- A. Introduction to Practical Circuit Designs -- B. How Limiters Function -- C. Coaxial Duplexers -- D. High Frequency, Waveguide Limiters -- E. Integrated Circuit Limiters -- F. Bulk Limiters -- References -- VIII Switches and Attenuators -- A. Broadband Coaxial Switches -- B. Coaxial High Power -- C. Switched Duplexers -- D. Waveguide Switches -- E. Stripline Switches -- F. Microstrip Switching -- G. Bulk Effect Switching -- References -- IX Phase Shifters and Time Delay Networks -- A. Introduction -- B. Switched Path Circuits -- C. Transmission Phase Shifters -- D. Reflection Phase Shifters -- E. Schiffman Phase Shifters -- F. Continuous Phase Shifters -- References -- Answers -- Appendices -- A. Constants and Formulas -- B. Material Properties -- C. Thermal Resistance Calculations -- D. Coaxial Lines -- E. Microstrip -- F. Stripline -- G. Waveguide -- H. Stripline Backward Wave Hybrid Coupler -- I. Bias Blocks and Returns -- J. The Smith Chart -- References and Bibliography.
    Abstract: Joseph F. White has studied, worked, and taught in all aspects of microwave semiconductor materials, control diodes, and circuit applications. He is thoroughly grounded in the physics and math­ ematics of the field, but has primarily the engineer's viewpoint, combining basic knowledge with experience and ingenuity to gen­ erate practical designs under constraints of required performance and costs of development and production. As a result of his teach­ ing experience and numerous technical papers and oral presenta­ tions, he has developed a clear, well-organized writing style that makes this book easy to use as a self-teaching text, a reference volume, and a design handbook. Dr. White believes that an engineer must have a good understand­ ing of semiconductor physics, a thorough knowledge of microwave circuit theory, at least an elementary acquaintance with transistor drivers, and the ability to check and refine a microwave circuit on a computer terminal to be qualified for modern, creative design of microwave semiconductor control components. These subjects are well covered in approximately the first half of the book; the second half treats the general and specific design of switches, at­ tenuators, limiters, duplexers, and phase shifters, with many ex­ amples drawn from his experience and that of others.
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  • 9
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400973527
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Pollution Monitoring Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 1.1 Definition and Use of the Term Heavy Metal -- 1.2 Sources of Heavy Metals in the Environment -- 1.3 Biological Indicators and Monitors -- 1.4 Philosophy of Monitoring -- 1.5 Why Biological? -- 1.6 Criteria for Selecting Good Biological Materials/Species -- 1.7 Concluding Remarks -- 2 Biological Indicators of Natural Ore-bodies: Geobotanical and Blogeochemical Prospecting for Heavy Metal Deposits -- 2.1 Introduction -- 2.2 Geobotanical Prospecting -- 2.3 Biogeochemical Prospecting -- 2.4 Use of Herbaria in Geobotanical and Biogeochemical Prospecting -- 2.5 Conclusions -- 3 The Use of Vegetation for Monitoring Airborne Heavy Metal Deposition -- 3A Background and Practical Considerations -- 3A.1 Introduction -- 3A.2 Particulate Transfer to Vegetation -- 3A.3 Vegetation as a Monitoring Agent -- 3A.4 Aerial Versus Soil Origins of Metals in Plant Samples -- 3A.5 Exposure Periods -- 3A.6 Use of Leaves -- 3A.7 Surface Characteristics of Vegetation, Especially Leaves -- 3B Examples of the Use of Vegetation Monitoring Surveys for Aerial Deposition of Metals -- 3B.1 Roadside Locations -- 3B.2 Smelters and Other Point Sources -- 3B.3 General Industrial or Urban Areas with Diffuse or Unidentified Sources -- 3B.4 Use of Tree Bark -- 3B.5 Use of Epiphytic Vascular Plants, Mosses, Lichens, Micro-organisms and Fungi -- 3B.6 Specific Use of Vegetation for Assessing Potential Hazards to Human and Domestic Animal Health . -- 4 Plants as Monitors of Soil Contamination -- 4.1 Introduction -- 4.2 Metal Distribution in Soils -- 4.3 Characteristics of Metal Uptake by Roots -- 4.4 Metal Tolerance and its Relevance to the Use of Higher Plants as Monitors of Soil Contamination . -- 4.5 Interpretation of Monitoring Results, Conclusions and Recommendations -- 5 The use of Terrestrial Animals as Monitors and Indicators of Environmental Contamination by Heavy Metals -- 5.1 Introduction -- 5.2 Invertebrates as Monitors and Indicators -- 5.3 Other Animals as Monitors -- 5.4 Conclusions -- 6 The Use of Imported Biological Materials as Monitoring Agents -- 6.1 Introduction -- 6.2 Preparation, Exposure and Analysis of Moss-bags. -- 6.3 Advantages and Disadvantages of Moss-bags -- 6.4 Examples of the Use of Sphagnum Moss-bags in the Field -- 6.5 Wind Tunnel Studies of Moss-bag Characteristics . -- 6.6 Empirical Calibration of Moss-bags Against Air-filter Samplers, Deposit Gauges, Plant and Soil Surfaces. -- 6.7 Relationships with Other Collection Materials -- 6.8 Conclusions -- 7 Retrospective and Historical Monitoring -- 7.1 Introduction -- 7.2 Tree-ring Analysis -- 7.3 Use of Tree Ring-widths as a Measure of Pollution -- 7.4 Use of Peat Samples -- 7.5 Use of Herbarium Specimens of Bryophytes and Lichens -- 7.6 Use of Preserved Higher Plant Specimens. -- 7.7 Use of Animal Specimens -- 7.8 Conclusions -- 8 Biological Monitoring in Perspective -- 8.1 Introduction -- 8.2 Related Studies -- 8.3 Selection of Material and Aims of Study -- 8.4 Sampling Standards and Cross-calibration -- 8.5 Conclusions -- References -- Species and Subject Index.
    Abstract: In the past two decades there has been an increasing public awareness of the hazards that exist from the contamination of the environment by toxic substances. 'Heavy metals' and the terrestrial environment are but one facet of the impact of toxic substances on the natural environment, and the use of biological materials for indicating the occurrence of, and continually monitoring the presence of, these materials is a specific topic which is of considerable interest to a diverse range of individuals, organisations and disciplines. It was our intention when we first en­ visaged this book that it should contain a description of a range of circumstances in which biological monitoring techniques have been employed in the terrestrial environment and that it should be seen as a practical text which dealt with the merits, shortcomings and suitability of biological monitoring materials. Monitoring is, however, a manifold process. It serves not only to provide information on past and present concentrations of toxic materials in various components of the environ­ ment, but also to provide information on the processes of environmental release, transport, accumulation and toxicity. Indeed, this may be one of the greatest virtues of biological monitoring over other forms of monitor­ ing. According to the skill of the staff employed in the monitoring procedure, the information that is accrued can have a vastly different value.
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  • 10
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    Dordrecht : Springer
    ISBN: 9789400959682
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Ecology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 What is a model? -- 1.1 The concept of models -- 1.2 Word models -- 1.3 Definition of model -- 1.4 Examples -- 2 Why do I need a model? -- 2.1 Reason for use of models -- 2.2 Complexity -- 2.3 Integration and testing of compatibility of information already collected about a system -- 2.4 Simulation as a synthesis of available information -- 3 How do I start? -- 3.1 Defining the problem -- 3.2 Word models -- 3.3 Diagrams -- 4 What help can I expect from mathematics? -- 4.1 Mathematical notations -- 4.2 Families of mathematical models -- 5 Do I need a computer? -- 5.1 Access to computers -- 5.2 Computer languages -- 5.3 Using the computer -- 6 How do I know when to stop? -- 6.1 Re-examination of objectives -- 6.2 Sensitivity analysis -- 6.3 Verification -- 6.4 Validation -- Appendix: Modelling checklist -- References.
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  • 11
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    Dordrecht : Springer
    ISBN: 9789401095396
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Gross anatomy and physiology -- 2.1 Muscle types -- 2.2 Physiological states -- 2.3 Activation -- 2.4 Physiological performance -- 2.5 Fuel and energetics -- 3 Muscle cells -- 3.1 Striated muscle -- 3.2 Sliding filament theory -- 3.3 Membrane systems -- 3.4 Fibre preparations -- 3.5 Unstriated muscle -- 4 Protein components -- 4.1 Proteins of the myofibril -- 4.2 Actin -- 4.3 Myosin -- 4.4 Actin—myosin interactions -- 5 Mechanism of ATP hydrolysis -- 5.1 Kinetic analysis -- 5.2 Myosin ATPase -- 5.3 Actin activation -- 6 Molecular basis of contraction -- 6.1 What makes filaments slide? -- 6.2 Electron microscope studies -- 6.3 X-ray diffraction studies -- 6.4 Mechanical transients -- 6.5 Mechanochemical coupling -- 7 Molecular basis of regulation -- 7.1 Role of calcium -- 7.2 Actin-linked regulation -- 7.3 Myosin-linked regulation -- 7.4 Multiple regulatory systems -- 8 Problems and prospects -- References.
    Abstract: The student of biolo,gical science in his final years as an undergraduate and his first years as a graduate is expected to gain some familiarity with current research at the frontiers of his discipline. New research work is published in a perplexing diversity of publications and is inevitably concerned with the minutiae of the subject. The sheer number of research journals and papers also causes confusion and difficulties of assimilation. Review articles usually presuppose a background knowledge of the field and are inevitably rather restricted in scope. There is thus a need for short but authoritative introductions to those areas of modern biological research which are either not dealt with in standard introductory textbooks or are not dealt with in sufficient detail to enable the student to go on from them to read scholarly reviews with profit. This series of books is designed to satisfy this need. The authors have been asked to produce a brief outline of their subject assuming that their readers will have read and remembered much of a standard introductory textbook of biology. This outline then sets out to provide by building on this basis, the conceptual framework within which modern research work is progressing and aims to give the reader an indication of the problems, both conceptual and practical, which must be overcome if progress is to be maintained.
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  • 12
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400958838
    Language: English
    Pages: Online-Ressource (X, 146 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Molecular factors that modify pKa values -- 3 Methods of pKa prediction -- 4 Prediction of pKa values of substituted aliphatic acids and bases -- 5 Prediction of pKa values for phenols, aromatic carboxylic acids and aromatic amines -- 6 Further applications of Hammett and Taft equations -- 7 Some more difficult cases -- 8 Extension of the Hammett and Taft equations -- 9 Examples where prediction presents difficulties -- 10 Recapitulation of the main pKa prediction methods -- A.1 Substituent constants for the Hammett and Taft equations -- A.4 Special sigma constants for para substituents -- A.6 Sigma constants for heteroatoms in heterocyclic rings -- References.
    Abstract: Many chemists and biochemists require to know the ionization constants of organic acids and bases. This is evident from the Science Citation Index which lists The Determination of Ionization Constants by A. Albert and E. P. Serjeant (1971) as one of the most widely quoted books in the chemical literature. Although, ultimately, there is no satisfactory alternative to experimental measurement, it is not always convenient or practicable to make the necessary measure­ ments and calculations. Moreover, the massive pK. compilations currently available provide values for only a small fraction of known or possible acids or bases. For example, the compilations listed in Section 1. 3 give pK. data for some 6 000--8 000 acids, whereas if the conservative estimate is made that there are one hundred different substituent groups available to substitute in the benzene ring of benzoic acid, approximately five million tri-substituted benzoic acids are theoretically possible. Thus we have long felt that it is useful to consider methods by which a pK. value might be predicted as an interim value to within several tenths of a pH unit using arguments based on linear free energy relationships, by analogy, by extrapolation, by interpolation from existing data, or in some other way. This degree of precision may be adequate for many purposes such as the recording of spectra of pure species (as anion, neutral molecule or cation), for selection of conditions favourable to solvent extraction, and for the interpretation of pH-profiles for organic reactions.
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  • 13
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789401173704
    Language: English
    Pages: Online-Ressource , digital
    Edition: Second Edition
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Fundamentals of Naval Science Series 4
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 The Art of Navigation -- 2 The Shipboard Navigation Department Organization -- Duties of the Navigator -- Relationship of the Navigator to the Command Structure -- The Navigator’s Staff -- 3 The Piloting Team -- The Navigator and His Plotter -- The Bearing Recorder -- The Bearing Taker -- The Radar Operator -- The Echo Sounder Operator -- The Piloting Team Routine -- Conclusion -- 4 The Nautical Chart -- The Terrestrial Coordinate System -- Chart Projections -- Chart Interpretation 26 Determination of Position, Distance, and Direction on a Mercator Chart -- Production of Nautical Charts -- The Chart Numbering System -- The Chart Correction System -- Summary -- 5 Navigational Publications -- Catalog of Nautical Charts, Publication No. 1-N -- NOS Nautical Chart Catalogs -- Coast Pilots -- Sailing Directions -- Fleet Guides -- Light List -- List of Lights -- Tide and Tidal Current Tables -- Pilot Charts -- Distance Between Ports, Publication No. 151 -- Almanacs -- Reference Texts and Manuals -- Publication Correction System -- Summary -- 6 Visual Navigation Aids -- Characteristics of Lighted Navigation Aids -- Identifying a Navigational Light -- Computing the Visibility of a Light -- Buoys and Beacons -- The U.S. Lateral System -- The IALA Combined Cardinal and Lateral System -- Use of Buoys and Beacons During Piloting -- Summary -- 7 Navigational Instruments -- The Measurement of Direction -- Measurement of Distance -- Measurement of Speed -- Measurement of Depth -- Plotting Instruments -- Miscellaneous Instruments -- Summary -- 8 Dead Reckoning -- Determining the Fix -- Principles of the Dead Reckoning Plot -- The Running Fix -- The Estimated Position -- The Track -- Summary -- 9 Shipboard Compasses -- The Magnetic Compass -- The Gyrocompass -- Summary -- 10 Radar -- Characteristics of a Surface-Search/Navigational Radar -- The Radar Output Display -- Interpretation of a Radarscope Presentation -- Use of Radar During Piloting -- Summary -- 11 Tide -- Causes of Tide -- Types of Tides -- Tidal Reference Planes -- Predicting Height of Tide -- The Bridge Problem -- The Shoal Problem -- Effect of Unusual Meteorological Conditions -- Summary -- 12 Current -- Ocean Current -- Tidal Current -- Wind-driven Currents -- Summary -- 13 Current Sailing -- The Estimated Current Triangle -- Solving the Estimated Current Triangle -- The Estimated Position Allowing for Current -- Determining an EP from a Running Fix -- The Actual Current Triangle -- Summary -- 14 Precise Piloting and Anchoring -- Ship’s Handling Characteristics -- Use of Advance and Transfer During Piloting -- Anchoring -- Summary -- 15 Voyage Planning -- Time -- The Voyage-Planning Process -- Optimum Track Ship Routing -- Miscellaneous Considerations -- Summary -- Appendix A. Chart No. 1 285 -- Appendix B. Abbreviations and Symbols Commonly Used in Piloting.
    Abstract: Throughout the history of warfare at sea, navigation has been an important basic determinant of victory. Occasionally, new members of the fraternity of the sea will look upon navigation as a chore to be tolerated only as long as it takes to find someone else to assume the responsibility. In my experience, such individuals never make good naval officers. Commander Hobbs has succeeded in bringing together the information and practical skills required for that individual who would take the first step down the road toward becoming a competent marine navigator. At the outset of this book, the author stresses the necessity for safe navigation, but there is another basic tenet of sea warfare that this book serves. The best weapons system man has ever devised cannot function effectively unless it knows where it is in relation to the real world, where it is in relation to the enemy, and where the enemy is in relation to the real world. Not all defeats can be attributed to this lack of information, but no victories have been won by those who did not know where they were.
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  • 14
    ISBN: 9789400981027
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Energy from Wastes Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Methods of production of fuels from biomass -- Physical and physico-chemical methods -- Biological methods -- 3 The microbiology and biochemistry of anaerobic digestion -- The microbial population in general -- The breakdown of carbohydrates -- The breakdown of nitrogenous compounds -- The breakdown of fats -- Minor bacterial reactions -- Methane production -- Factors affecting the rates of growth and activities of digester bacteria and interactions amongst the bacteria -- Conclusions -- 4 Types of digesters: theoretical aspects and modelling of digester systems and deviations from theory -- Biological models -- The Engineering Model -- The Economic Model -- 5 Types of digesters being constructed and the operation of digesters -- Starting a digestion -- The single-stage stirred-tank digester -- The contact digester -- Anaerobic filters -- The upflow sludge-blanket digester -- The fluidised-bed digester -- Digesters for agricultural wastes and vegetable matter -- Gas-holders and gas handling -- Safety precautions and tests with digesters -- 6 Uses of digested sludge -- Use as fertiliser -- Use in animal feedstuffs -- 7 Biogas production—laboratory and pilot-plant experiments -- General—the apparatus -- Domestic sewage -- Domestic garbage -- Industrial wastes -- Agricultural wastes -- Conclusions -- 8 Energy production by practical-scale digesters -- Domestic and municipal sewage -- Domestic garbage with sewage sludge -- Other wastes -- Appendix 1 Photographs of full-scale working digesters -- Appendix 2 Some estimates of wastes available for biogas or other fuel production -- Appendix 3 Glossary of terms.
    Abstract: This volume in the Energy from Wastes Series covers the area of methane production from agricultural and domestic wastes. Principally this involves the conversion of excreta and other organic effluents to a valuable gaseous fuel plus, in many cases, a useful sludge for fertiliser or feedstuffs. Dr Hobson and his colleagues have written a comprehensive text on the principles of microbiological processes and the biochemistry of anaerobic digestion, embracing the design of digesters with examples of current working installations. The potential for anaerobic digestion of wastes as diverse as sewage to fruit processing effluents is also reviewed. This work should be of interest to all who have to manage organic waste treatment and disposal, as well as to a wider readership who wish to know more about methane production by anaerobic digestion. ANDREW PORTEOUS v Preface The production of methane, or more exactly, a flammable 'biogas' containing methane and carbon dioxide, by microbiological methods ('anaerobic digestion') is not new. The reactions have been in industrial use for over a hundred years, but only in sewage purification processes. In some times of national stress, such as war-time, the microbiological production of gas purely for fuel has been investigated, but with the resumption of plentiful su pplies of fossil fuels the investigations have faded awa y.
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  • 15
    ISBN: 9789401173391
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Pollution Monitoring Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Chemistry and Biochemistry of Trace Metals in Biological Systems -- 2 Lead: Understanding the Minimal Toxicity of Lead in Plants -- 3 Cadmium -- 4 Copper -- 5 Zinc -- 6 Nickel -- 7 Other Trace Metals -- 8 Metalloids.
    Abstract: Trace metals occur as natural constituents of the earth's crust, and are ever present constituents of soils, natural waters and living matter. The biological significance of this disparate assemblage of elements has gradually been uncovered during the twentieth century; the resultant picture is one of ever-increasing complexity. Several of these elements have been demonstrated to be essential to the functions of living organisms, others appear to only interact with living matter in a toxic manner, whilst an ever-decreasing number do not fall conveniently into either category. When the interactions between trace metals and plants are considered, one must take full account of the known chemical properties of each element. Consideration must be given to differences in chemical reactivity, solubility and to interactions with other inorganic and organic molecules. A clear understanding of the basic chemical properties of an element of interest is an essential pre-requisite to any subsequent consideration of its biological significance. Due consideration to basic chemical considerations is a theme which runs through the collection of chapters in both volumes.
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  • 16
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400981058
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: The Developments Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Determination of Static Corrections -- 2. Vibroseis Processing -- 3. The l1 Norm in Seismic Data Processing -- 4. Predictive Deconvolution -- 5. Exploration for Geothermal Energy -- 6. Migration.
    Abstract: One facet of development in this field is that the methods of gathering and processing geophysical data, and displaying results, lead to presentations which are more and more comprehensible geologically. Expressed in another way, the work of the interpreter becomes progressively less onerous. The contributions in this collection of original papers illustrate this direction of development, especially in seismic prospecting. If one could carry out to perfection the steps of spiking deconvolution, migration and time--depth conversion, then the seismic section would be as significant geologically as a cliff-face, and as easy to understand. Perhaps this is not yet achieved, but it remains an objective, brought closer by work such as that described by the authors. The editor offers his best thanks to the contributors-busy geophysicists who have written with erudition on this range of subjects of current interest. A. A. FITCH v CONTENTS Preface v List of Contributors IX 1. Determination of Static Corrections A. W. ROGERS 2. Vibroseis Processing 37 P. KIRK The 11 Norm in Seismic Data Processing 53 3. H. L. TAYLOR 4. Predictive Deconvolution 77 E. A. ROBINSON 5. Exploration for Geothermal Energy 107 G. V. KELLER 6. Migration 151 P. HOOD Index 231 vii LIST OF CONTRIBUTORS P. HOOD Geophysicist, Geophysics Research Branch, The British Petroleum Co. Ltd, Britannic House, Moor Lane, London EC2Y 9BU, UK.
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  • 17
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    Dordrecht : Springer
    ISBN: 9789401164566
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Boston Studies in the Philosophy of Science 65
    Series Statement: Boston Studies in the Philosophy and History of Science 65
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Introduction: Science in Its Social Setting -- 2. The Present State of the Philosophy of Science -- 3. Was Wittgenstein Really Necessary? -- 4. Epistemology as an Aid to Science -- 5. Externalism -- 6. The Autonomy of Science -- 7. The Legitimation of Science -- 8. Sociologism in Philosophy of Science -- 9. Revolutions in Science, Occasional or Permanent? -- 10. Cultural Lag in Science -- 11. Storage and Communication of Knowledge -- 12. The Economics of Scientific Publications -- 13. Revising the Referee System -- 14. Scientific Schools and Their Success -- 15. Genius in Science -- 16. Scientists as Sleepwalkers -- 17. The Logic of Scientific Inquiry -- 18. The Choice of Scientific Problems -- 19. Between Metaphysics and Methodology -- 20. Research Project -- 21. The Methodology of Research Projects: A Sketch -- 22. Continuity and Discontinuity in the History of Science -- 23. Three Views of the Renaissance of Science -- 24. On Explaining the Trial of Galileo -- 25. The Origins of the Royal Society -- 26. The Ideological Import of Newton -- 27. Sir John Herschel’s Philosophy of Success -- 28. What Makes for a Scientific Golden Age? -- 29. Max Weber’s Scientific Religion -- 30. On Pursuing the Unattainable -- 31. Faith Has Nothing to do With Rationality -- 32. Rationality and the Tu Quoque Argument -- 33. Technocracy and Scientific Progress -- 34. Standards to Live By -- Bibliography of Joseph Agasssi -- Index of Names -- Index of Subjects.
    Abstract: "If a science has to be supported by fraudulent means, let it perish. " With these words of Kepler, Agassi plunges into the actual troubles and glories of science (321). The SOciology of science is no foreign intruder upon scientific knowledge in these essays, for we see clearly how Agassi transforms the tired internalistJexternalist debate about the causal influences in the history of science. The social character of the entire intertwined epistemological and practical natures of the sciences is intrinsic to science and itself split: the internal sociology within science, the external sociology of the social setting without. Agassi sees these social matters in the small as well as the large: from the details of scientific communication, changing publishing as he thinks to 'on-demand' centralism with less waste (Ch. 12), to the colossal tension of romanticism and rationality in the sweep of historical cultures. Agassi is a moral and political philosopher of science, defending, dis­ turbing, comprehending, criticizing. For him, science in a society requires confrontation, again and again, with issues of autonomy vs. legitimation as the central problem of democracy. And furthermore, devotion to science, pace Popper, Polanyi, and Weber, carries preoccupational dangers: Popper's elitist rooting out of 'pseudo-science', Weber's hard-working obsessive . com­ mitment to science. See Agassi's Weberian gloss on the social psychology of science in his provocative 'picture of the scientist as maniac' (437).
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  • 18
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    Dordrecht : Springer
    ISBN: 9789401572880
    Language: English
    Pages: Online-Ressource (XI, 260 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: The University of Western Ontario Series in Philosophy of Science, A Series of Books in Philosophy of Science, Methodology, Epistemology, Logic, History of Science, and Related Fields 19
    Series Statement: The Western Ontario Series in Philosophy of Science, A Series of Books in Philosophy of Science, Methodology, Epistemology, Logic, History of Science, and Related Fields 19
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Introduction -- 2. The Sources of Modern Methodology: Two Models of Change -- 3. A Revisionist Note on the Methodological Significance of Galilean Mechanics -- 4. The Clock Metaphor and Hypotheses: The Impact of Descartes on English Methodological Thought, 1650–1670 -- 5. John Locke on Hypotheses: Placing The Essay in the ‘Scientific Tradition’ -- 6. Hume (and Hacking) on Induction -- 7. Thomas Reid and the Newtonian Turn of British Methodological Thought -- 8. The Epistemology of Light: Some Methodological Issues in the Subtle Fluids Debate -- 9. Towards a Reassessment of Comte’s ‘Méthode Positive’ -- 10. William Whewell on the Consilience of Inductions -- 11. Why was the Logic of Discovery Abandoned? -- 12. A Note on Induction and Probability in the 19th Century -- 13. Ernst Mach’s Opposition to Atomism -- 14. Peirce and the Trivialization of the Self-Corrective Thesis -- Bibliographic Note -- Index of Names.
    Abstract: This book consists of a collection of essays written between 1965 and 1981. Some have been published elsewhere; others appear here for the first time. Although dealing with different figures and different periods, they have a common theme: all are concerned with examining how the method of hy­ pothesis came to be the ruling orthodoxy in the philosophy of science and the quasi-official methodology of the scientific community. It might have been otherwise. Barely three centuries ago, hypothetico­ deduction was in both disfavor and disarray. Numerous rival methods for scientific inquiry - including eliminative and enumerative induction, analogy and derivation from first principles - were widely touted. The method of hypothesis, known since antiquity, found few proponents between 1700 and 1850. During the last century, of course, that ordering has been inverted and - despite an almost universal acknowledgement of its weaknesses - the method of hypothesis (usually under such descriptions as 'hypothetico­ deduction' or 'conjectures and refutations') has become the orthodoxy of the 20th century. Behind the waxing and waning of the method of hypothesis, embedded within the vicissitudes of its fortunes, there is a fascinating story to be told. It is a story that forms an integral part of modern science and its philosophy.
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  • 19
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    Dordrecht : Springer
    ISBN: 9789400959026
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Techniques in Visible and Ultraviolet Spectometry 2
    Series Statement: Techniques in Visible and Ultraviolet Spectrometry 2
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 General considerations on fluorescence spectrometry -- 1.1 Introduction -- 1.2 Molecular photochemistry -- 1.3 Fluorescence instrumentation -- 1.4 Good spectroscopic practice -- 1.5 Fluorescence intensities -- 1.6 Nomenclature in fluorescence spectrometry -- 2 Monochromator wavelength calibration -- 2.1 Introduction -- 2.2 Characteristics of calibration methods -- 2.3 Use of spectral lines from the spectrometer light source -- 2.4 Use of an auxiliary light source -- 2.5 Use of narrow bandwidth fluorescence maxima of inorganic and organic solutes -- 2.6 Conclusions and recommendations -- 3 Stray light in fluorescence spectrometers -- 3.1 Origins of stray light and resultant errors -- 3.2 Stray light in grating monochromators -- 3.3 Summary and recommendations -- 4 Criteria for fluorescence spectrometer sensitivity -- 4.1 Background: inter-instrument comparisons -- 4.2 The limit of detection method -- 4.3 The signal-to-noise ratio method -- 4.4 Summary and recommendations -- 5 Inner filter effects, sample cells and their geometry in fluorescence spectrometry -- 5.1 Inner filter effects -- 5.2 Sample cells -- 5.3 Recommendations -- 6 Temperature effects and photodecomposition in fluorescence spectrometry -- 6.1 Errors caused by temperature effects -- 6.2 Countermeasures and recommendations for temperature effects -- 6.3 Errors caused by photolysis effects -- 6.4 Countermeasures and recommendations -- 7 Correction o excitation and emission spectra -- 7.1 Introduction: the need for correction procedures -- 7.2 Excitation spectra -- 7.3 Emission spectra -- 7.4 Polarization effects -- 7.5 Recommendations -- 8 The determination of quantum yields -- 8.1 Introduction -- 8.2 Primary methods of determining quantum yields -- 8.3 Secondary methods of determining quantum yields: use of fluorescence standards -- 8.4 Other methods of determining quantum yields -- 8.5 Summary and recommendations -- Appendix Corrected excitation and emission spectra.
    Abstract: The Photoelectric Spectrometry Group was formed in July 1948 in Cambridge. The Group was born out of a need for a forum of users to discuss problems and methodology associated with the new era of photoelectric spectrometers. Over the years the aims and objectives of the Group have been broadened to include many aspects of ultraviolet and visible spectrometry. In 1973, the Group renamed itself the UV Spectrometry Group (UVSG). The techniques of fluorescence, diffuse reflectance, ORD and CD were included in the Group's interest. In 1979, the UVSG became a registered charity. The present Group membership is some 200 practising spectroscopists, mostly from the UK with a small but growing overseas membership. In August 1977, the UVSG Committee set up three Working Parties: Cells for UV-Visible Spectrophotometers; Photometric and Wavelength Standards; and the Calibration of Fluorimeters. It was felt that a wealth of information and expertise in the practice of spectrometry was available within the Group and that it was appropriate for this to be gathered together in the form of a number of monographs. Initially the intention was that these should be circulated only amongst the Group membership. However, the suggestion was made that these monographs would be of interest to other scientists outside our specialist Group. The conclusions of the first two Working Parties were combined in Volume 1 of this series, and this monograph summarizes the work of the third Working Party.
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  • 20
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    Dordrecht : Springer
    ISBN: 9789400959415
    Language: English
    Pages: Online-Ressource (79 p) , digital
    Edition: Second edition
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 1.1 Regional cerebral metabolism -- 1.2 Cerebral requirements for glucose and oxygen -- References -- 2 Appearance of the brain -- 2.1 Gross appearance -- 2.2 Fluid compartments -- 2.3 Microscopic appearance -- References -- 3 Neurotransmission -- 3.1 The resting potential -- 3.2 The sodium pump -- 3.3 The action potential and nerve conduction -- 3.4 Chemical events at the synapse -- 3.5 Origin of synaptic vesicles -- 3.6 Post-synaptic events -- 3.7 Neurone-axonal transport -- References -- 4 Adaptive processes in the brain -- 4.1 Inducible enzymes -- 4.2 Adaptation to the environment -- 4.3 Drug tolerance and dependence -- 4.4 Learning and memory as adaptive processes? -- References.
    Abstract: The student of biological science in his final years as an undergraduate and his first years as a graduate is expected to gain some familiarity with current research at the frontiers of his discipline. New research work is published in a perplexing diversity of publications and is inevitably concerned with the minutiae of the subject. The sheer number of research journals and papers also causes confusion and difficulties of assimilation. Review articles usually presuppose a back­ ground knowledge of the field and are inevitably rather restricted in scope. There is thus a need for short but authoritative introductions to those areas of modern biological research which are either not dealt with in standard introductory textbooks or are not dealt with in suffi­ cient detail to enable the student to go on from them to read scholarly reviews with profit. This series of books is designed to satisfy this need. The authors have been asked to produce a brief outline of their subject assuming that their readers will have read and remembered much of a standard introductory textbook on biology. This outline then sets out to provide by building on this basis, the conceptual framework within which modern research work is progressing and aims to give the reader an indication of the problems, both conceptual and practical, which must be overcome if progress is to be maintained.
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  • 21
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    Dordrecht : Springer
    ISBN: 9789401092371
    Language: English
    Pages: Online-Ressource (X, 244 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: The Developments Series 2
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Copolymer Characterisation by 13C NMR -- Semi-Crystalline Polymers by Neutron Scattering -- 3. Laser Raman Spectroscopy on Synthetic Polymers -- 4. Characterisation of Polymers by ESCA -- 5. Characterisation of Polymer Solutions and Melts by Acoustic Techniques -- 6. Flow Birefringence and the Kerr Effect.
    Abstract: The policy adopted in Volume 1 of this series of including a relatively small number of topics for detailed review has been continued here. The techniques selected have received considerable attention in recent years. F or this reason and because of the significance of the characterisation data, further coverage of 13C nuclear magnetic resonance spectroscopy and small angle neutron scattering is given in the first two chapters. In Chapter I a large part of the review describes the determination of monomer sequence distributions and configurational sequences in copolymers formed from more than one polymerisable monomer. The review on neutron scattering (Chapter 2) is directed towards the determination of the chain conformation in semi-crystaIIine polymers, which has provided important results for the interpretation of chain folding and morphology in crystaIIisable polymers. Laser Raman spectroscopy has also been used for morphological studies, and this application together with a description of the theoretical and experimental aspects of the technique is given in Chapter 3. X-ray photoelectron spectroscopy because of its extreme sensitivity to surface characteristics has provided information on polymeric solids that could not be obtained by other techniques. The principles and practice of this ESCA technique, including its use for simple elemental analysis, structural elucidation and depth profiling, are described in Chapter 4. The final two chapters are mainly concerned with the chain conformation of polymers in dilute solution. Ultrasonic techniques (Chapter 5) show pmmise for observing the dynamics of conformational changes.
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  • 22
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    Dordrecht : Springer
    ISBN: 9789401539227
    Language: English
    Pages: Online-Ressource , digital
    Edition: Second Edition
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Organisms, genes and enzymes -- 2. Nucleic acids as the genetic material -- 3. The genetic code -- 4. Mutants and metabolism -- 5. The genetic control of metabolism -- 6. Gene structure -- Suggestions for further reading.
    Abstract: Writing this second edition of Biochemical Genetics proved to be more difficult than I had anticipated. The fixed format of the series meant that the addition of new material was made possible only by the dele­ tion of old. Since the book is intended for a student audience, I have retained the historical approach of the first edition and added new material only when it demonstrates a principle more effectively. At the time of writing, we are witnessing an information explosion resulting from the application of recombinant DNA technology to all manner of problems. I have added a sixth chapter indicating the impact of this work on our concepts of gene structure. I should like to thank Ed Byard, Bill Evans, Charles Schorn and Ed Ward, colleagues in the Biology Department at the University of Winnipeg, and Andrew Spence, a student in the department, for their comments on the manuscript of the second edition, and to reiterate my thanks to all those in the Department of Genetics at the University of Sheffield who commented on the first edition.
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  • 23
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    Dordrecht : Springer
    ISBN: 9789400959231
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Studies in Chemical Physics
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 The Mossbauer Effect -- 1.1 Resonant absorption and fluorescence -- 1.2 The Mossbauer effect -- 1.3 The Mossbauer spectrum -- 1.4 The Mossbauer spectrometer -- 1.5 Mossbauer isotopes -- 1.6 Computation of data -- References -- 2 Hyperfine Interactions -- 2.1 The chemical isomer shift -- 2.2 Magnetic hyperfine interactions -- 2.3 Electric quadrupole interactions -- 2.4 Combined magnetic and quadrupole interactions -- 2.5 Relative line intensities -- References -- 3 Molecular Structure -- 3.1 Iron carbonyls and derivatives -- 3.2 Geometrical isomerism in Fe and Sn compounds -- 3.3 Linkage isomerism in cyano-complexes of Fe -- 3.4 Conformations in organometallic compounds of Fe -- 3.5 Stereochemistry in tin compounds -- 3.6 Molecular iodine compounds -- Appendix Quadrupole splitting in cis- and trans-isomers -- References -- 4 Electronic Structure and Bonding: Diamagnetic Compounds -- 4.1 Formal oxidation state -- 4.2 Iodine -- 4.3 Tellurium and antimony -- 4.4 Tin -- 4.5 Covalent iron compounds -- References -- 5 Electronic Structure and Bonding:Paramagnetic Compounds -- 5.1 Quadrupole interactions -- 5.2 Magnetic hyperfine interactions -- 5.3 Spin cross-over -- 5.4 Pressure effects -- 5.5 Second and third row transition elements -- 5.6 Lanthanides and actinides -- References -- 6 Dynamic Effects -- 6.1 Second-order Doppler shift and recoilless fraction -- 6.2 The Gold an skii-Karyagin effect -- 6.3 Electron hopping and atomic diffusion -- 6.4 Paramagnetic relaxation -- 6.5 Superparamagnetism -- References -- 7 Oxides and Related Systems -- 7.1 Stoichiome tric spinels -- 7.2 Non-stoichiometric spinels -- 7.3 Exchange interactions in spinels -- 7.4 Rare-earth iron garnets -- 7.5 Transferred hyperfine interactions -- References -- 8 Alloys and Intermeiallic Compounds -- 8.1 Disordered alloys -- 8.2 Intermetallic compounds -- References -- 9 Analytical Applications -- 9.1 Chemical analysis -- 9.2 Silicate minerals -- 9.3 Surface chemistry -- References -- 10 Impurity and Decay After-effect Studies -- 10.1 Impurity doping -- 10.2 Decay after-effects -- References -- 11 Biological Systems -- 11.1 Haemoproteins -- 11.2 Ferredoxins -- References -- Observed Mossbauer Resonances.
    Abstract: The emergence of Mossbauer spectroscopy as an important experi­ mental technique for the study of solids has resulted in a wide range of applications in chemistry, physics, metallurgy and biophysics. This book is intended to summarize the elementary principles of the technique at a level appropriate to the advanced student or experienced chemist requiring a moderately comprehensive but basically non-mathematical introduction. Thus the major part of the book is concerned with the practical applications of Mossbauer spectroscopy, using carefully selected examples to illustrate the concepts. The references cited and the bibliography are intended to provide a bridge to the main literature for those who subseouent­ ly require a deeper knowledge. The text is complementary to the longer research monograph, 'Mossbauer Spectroscopy', which was written a few years ago in co-authorship with Professor N.N. Greenwood, and to whom I am deeply indebted for reading the preliminary draft of the present volume. I also wish to thank my many colleagues over the past ten years, and in particular Dr. R. Greatrex, for the many stimu­ lating discussions which we have had together. However my greatest debt is to my wife, who not only had to tolerate my eccen­ tricities during the gestation period, but being a chemist herself was also able to provide much useful criticism of the penultima te draft.
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  • 24
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789401094474
    Language: English
    Pages: Online-Ressource (80 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Structural aspects of isoenzymes -- 3 Isoenzymes in genetics and evolution -- 4 Isoenzymes in development and differentiation -- 5 Isoenzymes in metabolic regulation -- 6 Isoenzymes in cancer -- 7 Isoenzymes in diagnosis and disease -- 8 Separation and determination of isoenzymes.
    Abstract: Isoenzymes were 'discovered' 20 years ago and were at first regarded as interesting but rare occurrences. Since then a wealth of information on enzyme heterogeneity has accrued and it now seems likely that at least half of all enzymes exist as isoenzymes. This is important in many areas of biological and medical science. Thus isoenzyme studies have provided the main experimental substance for the neutral drift controversy in genetics and evolution; they have greatly extended our understanding of metabolic regulation not only in animals but also in bacteria and plants; their existence has made available a multitude of highly sensitive markers for the study of differentiation and development, as well as providing indices of aberrant gene expression in carcinogenesis and other pathological processes. Iso­ enzymes are also being used increasingly in diagnostic clinical bio­ chemistry. It is surprising that this phenomenon which affects such a high pro­ portion of enzymes and is clearly important in biochemistry should receive such scant attention in the standard textbooks of that subject, the formal treatment of isoenzymology in these rarely exceeding one or two pages. This may be because the 'pure biochemist' has tended to regard variation in enzyme properties between tissues more as an unwanted complication than as a potential source of insight into diversity of biological function.
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  • 25
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400958005
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Ecology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Reaching and colonizing islands -- 2.1 Getting there -- 2.2 Establishing a beach-head -- References -- 3 How many species? -- 3.1 Species number and habitat diversity -- 3.2 The effect of area alone -- 3.3 Equilibrium theory -- References -- 4 Islands as experiments in competition -- 4.1 Abundance shifts -- 4.2 Altitudinal shifts -- 4.3 Habitat shifts -- 4.4 Shifts in vertical foraging range -- 4.5 Dietary shifts -- 4.6 Assembly rules for island communities -- References -- 5 The very remote islands -- 5.1 The ancient conifers of New Caledonia -- 5.2 The Honeycreepers of Hawaii -- 5.3 Unresolved problems -- References -- 6 Some dangers of living on an island -- 6.1 The taxon cycle -- 6.2 What drives the cycle? -- References -- 7 Continental habitat islands -- 7.1 Islands of Páramo vegetation -- 7.2 Mountain mammals -- 7.3 Caves of limestone -- 7.4 Goldmines and Pikas -- References -- 8 Island ecology and nature reserves -- 8.1 How many species will a reserve support? -- 8.2 How long does it take to lose species? -- 8.3 Which species will be lost? -- 8.4 The design of reserves -- References -- Map-location of islands mentioned in text.
    Abstract: The islands of the Pacific and East Indies made an enormous and fateful impact on the minds of Charles Darwin and Alfred Wallace, the fathers of modem evolutionary theory. Since then island floras and faunas have continued to playa central role in the development of evolutionary, and more recently ecological thought. For much ofthis century island ecology was a descriptive science and a wealth of information has been amassed on patterns of species distributions, on the composition of island floras and faunas, on the classification of islands into types such as oceanic and continental, on the taxonomic description of insular species and sub-species and on the adaptations, often bizarre, of island creatures. However, biologists are not satisfied for long with the mere collection of data and the description of patterns, but seek unifying theories. Island ecology was transformed into a predictive science by the publication, in 1967, of MacArthur and Wilson's Theory of Island Biogeography. This, perhaps the most influential book written on island ecology, has been the stimulus for a generation of theoretical ecologists and gifted field workers. The books listed below in the bibliography will indicate to the reader the vast scope of island ecology and the changes in approach that have taken place over the years.
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  • 26
    ISBN: 9789401713948
    Language: English
    Pages: Online-Ressource (IX, 477 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. The Electric Power System -- 2. Faraday’s Induction Law -- 3. Magnetic Circuits -- 4. Sinusoidal Steady State -- 5. Transformers -- 6. Transformer Connections -- 7. Electromechanical Energy Conversion -- 8. Distributed Windings -- 9. Three-phase Synchronous Machines -- 10. Synchronous Motors -- 11. Synchronous Generators -- 12. Synchronous Machines With Salient Poles -- 13. Three-phase Induction Machines -- 14. Application of Induction Motors -- 15. Symmetrical Components -- 16. Two-phase Servomotors -- 17. Single-phase Motors -- 18. Commutator Machines -- 19. D-c Motors -- 20. D-c Generators -- 21. Synchros -- Answers to Problems.
    Abstract: There are good reasons why the subject of electric power engineering, after many years of neglect, is making a comeback in the undergraduate curriculum of many electrical engineering departments. The most obvious is the current public awareness of the "energy crisis. " More fundamental is the concern with social responsibility among college students in general and engineering students in particular. After all, electric power remains one of the cornerstones of our civilization, and the well-publicized problems of ecology, economy, safety, dependability and natural resources management pose ever-growing challenges to the best minds in the engineering community. Before an engineer can successfully involve himself in such problems, he must first be familiar with the main components of electric power systems. This text­ book will assist him in acquiring the necessary familiarity. The course for which this book is mainly intended can be taken by any student who has had some cir­ cuit analysis (using discrete elements, and including sinusoidal steady state) and elementary electromagnetic field theory. Most students taking the course will be in their junior or senior years. Once the course is completed, students may decide to go more deeply into the design and operation of these components and study them on a more advanced level, or they may direct their attention to the problems of the system itself, problems which are only hinted at briefly at various points herein.
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  • 27
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400995222
    Language: English
    Pages: Online-Ressource (352p) , digital
    Edition: Second Edition, Revised
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: A Pallas Paperback 35
    Series Statement: Synthese Library, Studies in Epistemology, Logic, Methodology, and Philosophy of Science 35
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Philosophy (General) ; Science Philosophy ; Logic ; Science—Philosophy. ; Social sciences. ; Humanities.
    Abstract: I. Logical Structure and Axiomatization -- II. The Traditional View -- III. The Ramsey View -- IV. The Ramsey View Emended -- V. Theoretical Functions with Special Forms -- VI. Classical Particle Mechanics -- VII. Identity, Equivalence and Reduction -- VIII. The Dynamics of Theories -- Updated Bibliography.
    Abstract: This book is about scientific theories of a particular kind - theories of mathematical physics. Examples of such theories are classical and relativis­ tic particle mechanics, classical electrodynamics, classical thermodynamics, statistical mechanics, hydrodynamics, and quantum mechanics. Roughly, these are theories in which a certain mathematical structure is employed to make statements about some fragment of the world. Most of the book is simply an elaboration of this rough characterization of theories of mathematical physics. It is argued that each theory of mathematical physics has associated with it a certain characteristic mathematical struc­ ture. This structure may be used in a variety of ways to make empirical claims about putative applications of the theory. Typically - though not necessarily - the way this structure is used in making such claims requires that certain elements in the structure play essentially different roles. Some playa "theoretical" role; others playa "non-theoretical" role. For example, in classical particle mechanics, mass and force playa theoretical role while position plays a non-theoretical role. Some attention is given to showing how this distinction can be drawn and describing precisely the way in which the theoretical and non-theoretical elements function in the claims of the theory. An attempt is made to say, rather precisely, what a theory of mathematical physics is and how you tell one such theory from anothe- what the identity conditions for these theories are.
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  • 28
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    Dordrecht : Springer
    ISBN: 9789400957985
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Ecology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: Preface -- 1 The nature of vegetation -- 1.1 Ubiquity of changes in time -- 1.2 Variation in space -- 1.3 The nature of vegetation in time -- 2 Processes of vegetation change -- 2.1 Initiation of successions and fluctuations -- 2.2 Immigration of species -- 2.3 Establishment -- 2.4 Competition -- 2.5 Site modification -- 2.6 Stabilization -- 3 Fluctuations -- 3.1 Definitions of vegetation change -- 3.2 Phenological changes -- 3.3 Changes with fluctuations in environment -- 4 Regeneration and cyclic changes -- 5 Primary successions -- 5.1 Successions on submerged and waterlogged soils -- 5.2 Succession behind retreating glaciers -- 6 Secondary successions -- 6.1 The course of secondary succession -- 6.2 Factors determining the course of secondary succession -- 6.3 Predictability of secondary succession -- 7 Changes caused by grazing animals -- 8 Concluding remarks -- References.
    Abstract: Vegetation dynamics is an important subject. A knowledge and under­ standing of it is central to the science of vegetation management-in grassland, range and nature reserve management, and in aspects of wildlife management, forestry and agricultural crop production. It is also a large and diffuse subject. In a small book such as this I had to be highly selective, and could not do equal justice to all aspects. I have had therefore to condense many examples, and more regrettably, many arguments. While I have tried to present a broad selection of topics and examples, the content inevitably reflects my own special interests and experience. The study of vegetation and its dynamics does not lend itselfto neat and tidy divisions, and the way of allotting material into different chapters here is arbitrary. I have used Chapter I to introduce a number of ideas, beginning with the nature of vegetation in space, then passing to an introduction to the nature of changes in vegetation with time, in particular those generally known as successions. The book also contains a number of asides to the text's central arguments; I hope the reader finds these interesting rather than disconcerting.
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  • 29
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400957909
    Language: English
    Pages: Online-Ressource (80 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 2 Solute transport at the cellular level -- 2.1 Driving forces -- 2.2 Carriers and pumps -- 2.3 Energy sources for active transport -- 2.4 Sensitive cells -- 3 Symplast and apoplast -- 3.1 The parallel pathways -- 3.2 Radial barriers — the endodermis -- 3.3 Transfer cells -- 4 The xylem pathway -- 4.1 Xylem structure -- 4.2 Ion movement in the xylem -- 4.3 Regulation of leaf nutrient content -- 5 The phloem pathway -- 5.1 Experiments to determine the pathway of assimilate translocation -- 5.2 Structural design of the sieve element -- 5.3 Composition of phloem sap -- 5.4 Movement in the phloem -- 5.5 Physiology of the phloem -- 6 Driving forces for long-distance transport -- 6.1 Transpiration and the cohesion theory -- 6.2 Postulated mechanisms for phloem transport -- References.
    Abstract: Plants, in addition to their role as primary synthesizers of organic com­ pounds, have evolved as selective accumulators of inorganic nutrients from the earth's crust. This ability to mine the physical environment is restricted to green plants and some microorganisms, other life forms being direct1y or indirect1y dependent on this process for their supply of mineral nutrients. The initial accumulation of ions by plants is of ten spatially separated from the photosynthetic parts, necessitating the transport to these parts of the inorganic solutes thus acquired. The requirement for energy-rich materials by the accumulation process is provided by a transport in the opposite direction of organic solutes from the photosynthetic areas. These transport phenomena in plants have been studied at the cellular level, the tissue level, and the whole plant level. The basic problems of analysing the driving forces and the supply of energy for solute transport remain the same for alI systems, but the method of approach and the type of results obtained vary widely with the experimental material employed, reflecting the variation of the solute transporting properties which have se1ectively evolved in response to both internal and external environmental pressures.
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  • 30
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    Dordrecht : Springer
    ISBN: 9789401724685
    Language: English
    Pages: Online-Ressource (XIV, 417 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1. Introduction -- 2. An outline of the anatomy -- 3. Respiration, circulation and excretion -- 4. Feeding and digestion -- 5. Reproduction and growth -- 6. Endocrinology -- 7. An inventory of the sense organs -- 8. What an octopus sees -- 9. Touch and the role of proprioception in learning -- 10. Effectors and motor control -- 11. Learning and brain lesions: 1: Mainly tactile learning -- 12. Learning and brain lesions: 2: Visual learning -- References -- Author index.
    Abstract: between the organ systems of cephalopods and those of less ambitious molluscs. Octopus does, as we would predict, live close to the limits set by its own physiology. The circulation, to take one example, is barely adequate for such an active animal, mainly because of the absence of any system for pack­ aging the blood pigment; haemocyanin in solution is a poor oxygen carrier. Cephalopod blood can transport less than 5 millilitres of oxygen per 100 ml of blood (compared with about 15 vol% in fish) and the whole supercharged system of triple hearts, high blood pressure and pulsating blood vessels succeeds only in returning blood that retains less than 30% of its dissolved oxygen by the time it reaches the gills. This at rest; the effect of exercise is immediate and surprisingly long­ lasting even in octopuses as small as 300 g, which must very swiftly run into oxygen debt when they flee from predators or pursue their prey (Sections 3.2.2, 3.2.4). Digestion, too would seem to be limiting. As with other molluscs, digestion in Octopus is based on secretion­ absorption cycles by a massive diverticulum of the gut, an adequate system in a less hectic past, but scarcely appropriate in a predator that must be an opportunist in the matter of feeding. Octopus feeds mainly at night, and spends a great deal of every day sitting at home.
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  • 31
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    Dordrecht : Springer
    ISBN: 9789400957961
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Chapman and Hall Mathematics Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Optimization problems; introduction -- 1.1 Introduction -- 1.2 Transportation network -- 1.3 Production allocation model -- 1.4 Decentralized resource allocation -- 1.5 An inventory model -- 1.6 Control of a rocket -- 1.7 Mathematical formulation -- 1.8 Symbols and conventions -- 1.9 Differentiability -- 1.10 Abstract version of an optimal control problem -- References -- 2 Mathematical techniques -- 2.1 Convex geometry -- 2.2 Convex cones and separation theorems -- 2.3 Critical points -- 2.4 Convex functions -- 2.5 Alternative theorems -- 2.6 Local solvability and linearization -- References -- 3 Linear systems -- 3.1 Linear systems -- 3.2 Lagrangean and duality theory -- 3.3 The simplex method -- 3.4 Some extensions of the simplex method -- References -- 4 Lagrangean theory -- 4.1 Lagrangean theory and duality -- 4.2 Convex nondifferentiable problems -- 4.3 Some applications of convex duality theory -- 4.4 Differentiable problems -- 4.5 Sufficient Lagrangean conditions -- 4.6 Some applications of differentiable Lagrangean theory -- 4.7 Duality for differentiable problems -- 4.8 Converse duality -- References -- 5 Pontryagin theory -- 5.1 Introduction -- 5.2 Abstract Hamiltonian theory -- 5.3 Pointwise theorems -- 5.4 Problems with variable endpoint -- References -- 6 Fractional and complex programming -- 6.1 Fractional programming -- 6.2 Linear fractional programming -- 6.3 Nonlinear fractional programming -- 6.4 Algorithms for fractional programming -- 6.5 Optimization in complex spaces -- 6.6 Symmetric duality -- References -- 7 Some algorithms for nonlinear optimization -- 7.1 Introduction -- 7.2 Unconstrained minimization -- 7.3 Sequential unconstrained minimization -- 7.4 Feasible direction and projection methods -- 7.5 Lagrangean methods -- 7.6 Quadratic programming by Beale’s method -- 7.7 Decomposition -- References -- Appendices -- A.1 Local solvability -- A.2 On separation and Farkas theorems -- A.3 A zero as a differentiable function -- A.4 Lagrangean conditions when the cone has empty interior -- A.5 On measurable functions -- A.6 Lagrangean theory with weaker derivatives -- A.7 On convex functions.
    Abstract: In a mathematical programming problem, an optimum (maxi­ mum or minimum) of a function is sought, subject to con­ straints on the values of the variables. In the quarter century since G. B. Dantzig introduced the simplex method for linear programming, many real-world problems have been modelled in mathematical programming terms. Such problems often arise in economic planning - such as scheduling industrial production or transportation - but various other problems, such as the optimal control of an interplanetary rocket, are of similar kind. Often the problems involve nonlinear func­ tions, and so need methods more general than linear pro­ gramming. This book presents a unified theory of nonlinear mathe­ matical programming. The same methods and concepts apply equally to 'nonlinear programming' problems with a finite number of variables, and to 'optimal control' problems with e. g. a continuous curve (i. e. infinitely many variables). The underlying ideas of vector space, convex cone, and separating hyperplane are the same, whether the dimension is finite or infinite; and infinite dimension makes very little difference to the proofs. Duality theory - the various nonlinear generaliz­ ations of the well-known duality theorem of linear program­ ming - is found relevant also to optimal control, and the , PREFACE Pontryagin theory for optimal control also illuminates finite dimensional problems. The theory is simplified, and its applicability extended, by using the geometric concept of convex cones, in place of coordinate inequalities.
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  • 32
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    Dordrecht : Springer
    ISBN: 9789400959538
    Language: English
    Pages: Online-Ressource (XVII, 329 p) , digital
    Edition: Second Edition
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Chapman and Hall Mathematics Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Graphs -- 2 Closed Surfaces -- 3 Simplicial Complexes -- 4 HomoLogy Groups -- 5 The Question of Invariance -- 6 Some General Theorems -- 7 Two More General Theorems -- 8 Homology Modulo 2 -- 9 Graphs In Surfaces -- Appendix: Abelian Groups -- Basic definitions -- Finitely generated (f.g.) and free abelian groups -- Quotient groups -- Exact sequences -- Direct sums and splitting -- Presentations -- Rank of a f.g. abelian group -- References -- List of Notation.
    Abstract: viii homology groups. A weaker result, sufficient nevertheless for our purposes, is proved in Chapter 5, where the reader will also find some discussion of the need for a more powerful in­ variance theorem and a summary of the proof of such a theorem. Secondly the emphasis in this book is on low-dimensional examples the graphs and surfaces of the title since it is there that geometrical intuition has its roots. The goal of the book is the investigation in Chapter 9 of the properties of graphs in surfaces; some of the problems studied there are mentioned briefly in the Introduction, which contains an in­ formal survey of the material of the book. Many of the results of Chapter 9 do indeed generalize to higher dimensions (and the general machinery of simplicial homology theory is avai1able from earlier chapters) but I have confined myself to one example, namely the theorem that non-orientable closed surfaces do not embed in three-dimensional space. One of the principal results of Chapter 9, a version of Lefschetz duality, certainly generalizes, but for an effective presentation such a gener- ization needs cohomology theory. Apart from a brief mention in connexion with Kirchhoff's laws for an electrical network I do not use any cohomology here. Thirdly there are a number of digressions, whose purpose is rather to illuminate the central argument from a slight dis­ tance, than to contribute materially to its exposition.
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  • 33
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    Dordrecht : Springer
    ISBN: 9789400957329
    Language: English
    Pages: Online-Ressource (63 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Energy and basal metabolism -- 2 Regulation of enzyme activity -- 3 Carbohydrates -- 4 Lipids and fatty acids -- 5 Protein and amino acids -- 6 Vitamins -- 7 Diet and hormone interactions -- 8 Application of knowledge.
    Abstract: Though the major emphasis of this book will be references to several basic texts are given at the to provide the nutritionist with a biochemical end of the introduction. approach to his experimental and practical To facilitate easy reference, the book has problems, it is hoped that the book will also be been divided into chapters according to the of use to the biochemist and physiologist to roles of the basic nutrients in metabolism. demonstrate how dietary nutrition manipula­ Within chapters, discussion will include such tion can be used as a powerful tool in solving topics as the effects of nutrients on metabolism, problems in both physiology and biochemistry. the fate of nutrien ts, the roles of various tissues There will be no attempt to write an all-encom­ and interaction of tissues in utilizing nutrients, passing treatise on the relationship between and the biochernical mechanisms involved. biochemistry and nutrition; rather, it is hoped Toward the end of the book, several example that the suggestions and partial answers offered problems will be presented, which we hope will here will provide the reader with a basis for provide the reader with the opportunity to approaching problems and designing experi­ form testable hypotheses and design experi­ ments.
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  • 34
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    Dordrecht : Springer
    ISBN: 9789401169066
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Basic ideas about molecular shape -- 1.1 Shapes of biopolymers -- 1.2 Conformational principles -- 1.3 Shapes in equilibrium -- 2 The building units -- 2.1 Pyranose (six membered) forms -- 2.2 Furanose (five membered) forms -- 2.3 Other forms -- 2.4 Conformation and configuration: isomers and derivatives -- 2.5 Sugar shapes in hydrolysis of carbohydrate chains -- 2.6 Prediction of shapes -- 2.7 Natural building units -- 3 The linkages -- 3.1 Linkage structures and patterns -- 3.2 Linkage conformation -- 3.3 Chain conformation: order versus disorder -- 4 Simple carbohydrate chains of the periodic type -- 4.1 Conformational families -- 4.2 Occurrence, properties and function of the ribbon family -- 4.3 Occurrence, properties and function of the hollow helix family -- 4.4 Loosely jointed linkages and chains -- 5 More complex carbohydrate chains -- 5.1 Periodic chains with mixed linkages -- 5.2 Interrupted chain sequences -- 5.3 Aperiodic sequences -- References.
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  • 35
    ISBN: 9789401713795
    Language: English
    Pages: Online-Ressource (184 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: One Transformation and Recent Organization of Hungarian Agriculture -- I. The Postwar Land Reform -- II. The Socialist Transformation of Hungarian Agriculture -- III. Scale Returns, Farm Size and Changes in Farm Organization -- IV. Changes in Hungary’s Farm Organization: A Mathematical Restatement -- Two Cooperative Models -- v. The Major Social and Economic Features of Cooperative Farming -- VI. Mathematical Models of Cooperative Farming -- Three Cooperative Optimization -- VII. Theoretical and Methodological Aspects of Cooperative Optimization -- VIII. Optimization in the Large Collective Enterprise -- IX. Economic Welfare and Objectives of Cooperative Households -- X. Cooperative Equilibrium and Economic Policy -- Summary And Conclusions -- References.
    Abstract: The present scientific and technical revolution has brought science into the range of the most effective forces of production. The formula "science= production force" applies also to the social sciences whose explorations of human relationships and drives have reached previously unsuspected depths. Objectives, such as higher living standards and full employment, economic growth and stability, social equity and security, have both called for and provided a basis for the exploitation of possibilities offered by the natural and technical sciences. In today's agriculture, age-old traditions are in the process of disintegra­ tion, but the heredity of a century (or that of even a millennium as in Hungary) does not get dissolved without defending itself. Technical progress and social restratification, the emergence of new scales of values and preferences, the adjustment of the rural communities to their new tasks and conditions - all these have transformed farm operations and farming techniques. But agriculture, even under its revolutionized surface, still hides deep, almost untouched layers. If economists and agriculturalists are perplexed by the multitude and variety of the visible farm problems, there exist many others about which they can only guess, which they must follow up. In formulating and solving these problems, agricultural economists have professional tasks: (1) facilitating the most efficient use of agricultural resources from the standpoint of the national economy, and (2) helping farmers and farm people to attain their stated, socially feasible objectives.
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  • 36
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789401160650
    Language: English
    Pages: Online-Ressource (XII, 304 p) , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: The Modern University Physics Series
    Series Statement: The Modern University in Physics Series
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Fundamentals -- 1.1 Introduction -- 1.2 Wave mechanics -- 1.4 Transition elements -- 1.5 Atomic magnetism -- 1.6 Electrons in solids -- 2 Structure of Solids -- 2.1 Introduction—atomic bonding -- 2.2 Crystal structure -- 2.3 Lattice planes and directions -- 2.4 Atomic packing -- 2.5 Covalent solids -- 2.6 Ionic solids -- 2.7 Summary -- 2.8 Lattice imperfections -- 2.9 Lattice vibrations -- 2.10 Point defects -- 2.11 Line defects -- 2.12 Plane defects -- 2.13 Amorphous materials -- 3 Preparation of Materials -- 3.1 Introduction -- 3.2 Mechanism of crystal growth -- 3.3 Growth from the melt -- 3.4 Non-melt techniques -- 3.5 Thin films -- 3.6 The origin of dislocations during crystal growth -- 3.7 Non-crystalline materials -- 3.8 Amorphous semiconductors -- 3.9 Plastic materials -- 4 Practical Determination of Structure -- 4.1 Introduction -- 4.2 Theoretical X-ray diffraction -- 4.3 Practical X-ray diffraction -- 4.4 Other applications of X-ray diffraction -- 4.5 Neutron diffraction -- 4.6 Electron diffraction -- 4.7 Structure of amorphous materials -- 4.8 Other techniques -- 5 Mechanical Properties of Materials -- 5.1 Introduction -- 5.2 Mechanical testing -- 5.3 Elastic behaviour -- 5.4 Plastic behaviour -- 5.5 Fracture -- 5.6 Strengthening of materials -- 5.7 Creep -- 5.8 Mechanical properties of plastics -- 6 Thermal Properties -- 6.1 Introduction -- 6.2 Thermal statistics -- 6.3 Heat capacity -- 6.4 Specific heat anomalies -- 6.5 Thermal expansion -- 6.6 Thermal conductivity -- 6.7 Thermoelectricity -- 7 Electrical Properties -- 7.1 Introduction -- 7.2 Metals -- 7.3 Semiconductors -- 7.4 Transition metal compounds -- 7.5 Polarons -- 7.6 Magnetic semiconductors -- 7.7 Amorphous materials -- 7.8 Switching -- 8 Dielectrics -- 8.1 Introduction -- 8.2 Mechanisms of polarization -- 8.3 The local field -- 8.4 The Clausius-Mosotti relation -- 8.5 Dielectric relaxation -- 8.6 Applications -- 8.7 Piezoelectric, pyroelectric and ferroelectric materials -- 8.8 Piezoelectricity -- 8.9 Ferroelectricity -- 8.10 Classification of ferroelectric materials -- 8.11 Barium titanate -- 8.12 Ferroelectric ceramics -- 8.13 Ferroelectric domains -- 8.14 Pyroelectricity -- 9 Magnetic Properties -- 9.1 Introduction -- 9.2 Classification of magnetic materials -- 9.3 Diamagnetism -- 9.4 Paramagnetism 187 9.4.1 Pauli paramagnetism -- 9.5 Ferromagnetism -- 9.6 Magnetic anisotropy -- 9.7 Magnetostriction -- 9.8 Ferromagnetic domains -- 9.9 Microscopic explanations of ferromagnetism -- 9.10 Applications of ferromagnetic materials -- 9.11 Antiferromagnetism -- 9.12 Antiferromagnetic compounds -- 9.13 Antiferromagnetic domains -- 9.14 Ferrimagnetism -- 9.15 Ferrimagnetic domains—magnetic bubbles -- 9.16 Magnetic ceramics -- 9.17 Applications of ferrimagnetic materials -- 10 Optical Properties -- 10.1 Introduction -- 10.2 Refractive index -- 10.3 Absorption -- 10.4 Reflection -- 10.5 Natural birefringence -- 10.6 Induced birefringence -- 10.7 Non-linear optics -- 10.8 Secondary processes -- 10.9 Lasers -- 11 Superconductivity -- 11.1 Introduction -- 11.2 Resistanceless and superconducting states -- 11.3 Superconductivity -- 11.4 Penetration depth -- 11.5 The two-fluid model -- 11.6 The intermediate state -- 11.7 Coherence length -- 11.8 Type II superconductors -- 11.9 Theory of superconductivity -- 11.10 Superconducting materials and their applications -- Appendix I Electrons in Solids -- A1.1 The free electron model -- A1.2 The band model -- A1.3 Electrons and holes-effective mass -- Appendix II Periodic Chart of the Elements -- Appendix III List of the Elements -- Table of Physical Constants -- Answers to Questions.
    Abstract: Materials Science has now become established as a discipline in its own right as well as being of increasing importance in the fields of Physics, Chemistry and Engineering. To the student meeting this subject for the first time the combination of disciplines which it embraces represents a formidable challenge. He will require to understand the lan­ guage of the physicist and chemist as well as appreciate the practical uses and limita­ tions of solid materials. This book has been written as an introduction to the Physical Properties of Materials with these thoughts in mind. The mathematical content has been limited deliberately and emphasis is placed on providing a sound basis using simplified models. Once these are understood we feel that a mathematical approach is more readily assimilated and for this purpose supplementary reading is suggested. While the authors are deeply aware of the pitfalls in attempting such a treatment this is meant to be an essentially simple book to point the many avenues to be explored. We anticipate that the book will appeal to first and second year degree students in a variety of disciplines and may not prove too difficult for those studying appropriate Higher National Certificate and Diploma courses. Electrical engineers working in the field of materials applications may well find it useful as a guide to modern thinking about materials and their properties. The book begins with an introduction to some basic ideas of modern physics.
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  • 37
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400957640
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Cambridge Studies in Applied Econometric 2
    Series Statement: Cambridge Studies in Applied Econometrics 2
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: I An Overview -- 1 Models, Projections and Policies -- 2 An Overview of the Model -- 3 Solving the Model -- II The Model: Specification and Estimation -- 4 Personal Consumption -- 5 Investment -- 6 Exports -- 7 Imports -- 8 Employment -- 9 Prices and Profits -- 10 Incomes and Expenditures -- 11 Company Profits, Dividends and Retentions -- III Applications: The British Economy in 1980 -- 12 The British Economy in 1980: A Standard View -- 13 Alternative Economic Environments -- 14 Alternative Taxation Systems and Their Incidence -- 15 Budgetary Policy, Public Expenditure and the Balance of Payments -- 16 Alternative Economic Policies -- Appendix the Classifications Used and the Sources of Data -- A List of Works Cited -- Author Index.
    Abstract: Since the first statement of the aims and methods of the Cambridge Growth Project, which appeared in 1962 as the first number of our former series A Programme for Growth, we have produced a volume on the state ofthe model and on projections derived from it at roughly five year intervals: Exploring 1970 (1965), Exploring 1972 (1970) and now the present book. A comparison of these publications shows the directions in which we have developed our model. First, we have been able to model more parts of the economy and to model them better; and, second, by adopting a targets-and-instruments approach, we have been able to tackle questions of policy. As a consequence of the first of these improvements, the model has become more closely knit and variables which were previously exogenous have become endogenous; and, as a consequence of the second, the model has become less rigid and can be used to suggest policies for correcting some ofthe undesir­ able features that emerge from the projections.
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  • 38
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789400957435
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 1.1 The problem -- 1.2 Overall steps in protein biosynthesis -- 2 The molecules involved in protein biosynthesis -- 2.1 Messenger RNA -- 2.2 Ribosomes -- 2.3 Transfer RNA -- 2.4 Initiator tRNA -- 2.5 Amino-acyl-tRNA synthetases -- 2.6 Elongation factors -- 2.7 Peptidyl transferase -- 2.8 Initiation factors -- 2.9 Termination factors -- References -- 3 The mechanism of protein biosynthesis and its control -- 3.1 Introduction -- 3.2 mRNA metabolism -- 3.3 Initiation complex formation -- 3.4 Elongation -- 3.5 Termination of protein biosynthesis and post-translational modification -- 3.6 RNA phage protein synthesis -- References.
    Abstract: 46 3. 2 mRNA metabolism 47 3. 3 Initiation complex formation 3. 3. 1 Binding of initiator tRNA 47 3. 3. 2 Binding of messenger RNA 50 3. 4 Elongation 56 3. 5 Termination of protein biosynthesis and post-translational modification 59 RNA phage protein synthesis 61 3. 6 References 63 Index 64 1 Introduction possible control processes operating to adjust 1. 1 The problem protein synthesis to the needs of the cells and The discovery that the genetic material of organism. It will be assumed that the reader has living organisms is DNA, and the later de­ some knowledge of molecular biology in gen­ monstration that the DNA molecule is a eral and protein biosynthesis in particular, but double helix were both great milestones in twentieth century science, and formed the by way of introduction each of the major molecules and stages of the process will be foundation of the new discipline of molecular described in simple terms, and in subsequent biology. But even after these momentous dis­ chapters each will be discussed again in coveries, the detailed mechanism by which such genetic material could be expressed as the struc­ greater depth. tural and catalytic proteins which play so im­ portant a role in the functioning of all living 1. 2 Overall steps in protein biosynthesis The information encoded in the two comple­ cells was still not obvious.
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  • 39
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789400957343
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 1.1 What is Selectivity? -- 1.2 The aims and accomplishments of Selectivity -- References -- 2 Three principles that control selectivity -- 3 Steps in the correlation of structure with biological activity -- 3.1 Introduction -- 3.2 The first correlations -- 3.3 The concept of ‘receptors’ -- 3.4 The receptor as an enzyme or permease -- 3.5 The receptor as a nucleic acid -- 3.6 The receptor as a coenzyme, or other small molecule -- 3.7 Other aspects of receptors -- 3.8 Targets that are not necessarily receptors -- 3.9 Regression analysis -- 3.10 Conclusion -- References -- 4 Favourable differences in distribution: the first principle of selectivity -- 4.1 Some examples -- 4.2 Qualitative aspects of distribution -- 4.3 Quantitative aspects of distribution -- 4.4 The permeability of natural membranes -- 4.5 Metabolic change leading to activation -- 4.6 Metabolic change leading to inactivation -- 4.7 Synergism and antagonism -- 4.8 Conclusion -- References -- 5 Favourable differences in biochemistry: the second principle of selectivity -- 5.1 Introduction -- 5.2 Analogous enzymes -- 5.3 More analogous enzymes: the dihydrofolate reductases -- 5.4 Absence of enzymes from one of the species I. The sulphonamides and organophosphates -- 5.5 Absence of enzymes. II Further examples -- 5.6 Metabolite analogues (mostly antagonists) -- 5.7 Other utilizable biochemical differences -- 5.8 Conclusion -- References -- 6 Favourable differences in cell structure: the third principle of selectivity -- References -- 7 Acquired resistance to drugs: the loss of selectivity.
    Abstract: 1. 1 What is Selectivity? purpose, and crop protective agent for the A biologically-active substance is said to be second, but there is no fundamental difference selective if it strongly affects certain cells with­ of principle in their mode of action. out causing any change in others, even when the Drug therapy has two, fundamentally two kinds of cells are close neighbours. In living opposed divisions. The first of these strives to organisms, there are many substances, often improve the action of one of the cell's natural quite small molecules, which have been chosen agents by modifying the molecule in order to for their specificity. This choice has been made localize or intensify its action. For instance, under the strong pressure of natural selection, the solubility can be decreased to make it form unhurried by any consideration of time. Such a deposit, or a change is made so that it becomes chemical compounds operate the metabolism a poorer fit on the naturally-occurring destruc­ of the cells and tissues, and ensure their health, tive enzyme. Both of these devices have proved survival, and reproduction. Important among useful in therapy, e. g. with steroid hormones. the smaller of these selective molecules are Such drugs, which seek to improve on Nature vitamins, coenzymes, hormones, neurotrans­ by performing more desirably, are called mitters, inorganic ions, nutritional fragments, agonists.
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  • 40
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    Online Resource
    Dordrecht : Springer
    ISBN: 9789401165075
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: A Review of the Principles of Electrical & Electronic Engineering 3
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Vacuum Tubes -- 2 Electron Optics -- 3 Microwave Tubes -- 4 Electrons and Holes in Solids -- 5 Semiconductor Devices -- 6 Semiconductor Technology and Microelectronics -- 7 Masers and Lasers -- 8 Super Conducting Devices -- 9 Electron Microscopes -- 10 Plasmas -- 11 Particle Accelerators.
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  • 41
    Online Resource
    Online Resource
    Dordrecht : Springer
    ISBN: 9789401095327
    Language: English
    Pages: Online-Ressource , digital
    Edition: Springer eBook Collection. Humanities, Social Sciences and Law
    Series Statement: Outline Studies in Biology
    Parallel Title: Erscheint auch als
    Parallel Title: Erscheint auch als
    Keywords: Science (General) ; Social sciences. ; Humanities.
    Abstract: 1 Introduction -- 1.1 Historical development of molecular virology -- 1.2 What is a virus? -- 1.3 Titration of viruses -- 1.4 Virus-host interactions -- 2 The virion -- 2.1 Principles of virion construction -- 2.2 Special features of virion anatomy -- 2.3 Viral nucleic acids -- 2.4 The virion: function -- 3 The virus-infected cell -- 3.1 Transcription and translation in the virus-infected cell -- 3.2 Post-translational modification of proteins -- 3.3 Genome replication -- 3.4 Virus assembly -- 3.5 Virus release -- 3.6 Temperate phage and lysogeny -- 4 Virus genetics -- 4.1 Mutations -- 4.2 Functional or complementation analysis -- 4.3 Fundamental studies in recombination -- 4.4 Chromosome mapping -- 4.5 Genetic recombination -- 5 Tumour virology -- 5.1 What is a tumour? -- 5.2 Causation of tumours -- 5.3 Papovaviruses -- 5.4 RNA tumour viruses -- 5.5 Comparison of transformation by DNA and RNA tumour viruses; oncogene theory -- Suggestions for further reading.
    Abstract: 1. 1 Historical development of molecular virology of effort on a limited number of phages, Viruses have occupied a central position in notably the Escherichia coli phages T2 and T4. molecular biology ever since its development as At the same time Lwoff and his colleagues were an independent discipline. Indeed, molecular studying phage A, a temperate phage of E. coli, biology itselflargely developed out of the work which was to lead to equally fundamental pioneer studies of Delbriick, Luria and Hershey, observations on the regulation of macro­ who realized, in the late 1930's, that bacterial molecular synthesis. viruses (bacteriophages, often abbreviated to The study of animal and plant viruses has its phages) had properties which made them origins in the latter half of the 19th century uniquely suitable as a model system for an and was largely initiated by workers in medical, attack on one of the then outstanding problems veterinary and agricultural disciplines. Many of of biology, the definition of the gene in their practical successes owe little to molecular physical and chemical terms. The favourable biology, stemming instead from those properties of these viruses include the rapidity approaches successful in combating other of their growth, their ease of assay, and the parasites, such as vector control and the availability of easily scored genetic markers. breeding of resistant varieties of plants.
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