Download or read book On Formulating a Simple D Region Model written by William Swider and published by . This book was released on 1987 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on a body of work that suggests that the effective recombination coefficients in the daytime D-Region are fairly invariant and thus lead to a rather simple solution for the electron concentrations. In addition, a quadratic expression is available for the estimation of electron concentrations at night. The ionization production rate q must be known and incorporated into the chemistry of the D region to determine electron concentrations (e) as a function of altitude. There is some D region research which supports a simple way to determine (e) once q is known. Thus, the daytime effective recombination coefficient, Psi, appears to be relatively insensitive to q and can provide for the determination of (e), (e) = sq rt(q/Psi) under steady-state conditions. For steady-state conditions at night, an equation exists which yields (e) with reasonable accuracy. Keywords: D Region; Ionosphere; Mesosphere. (JHD).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Research Papers written by and published by . This book was released on with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Models of Urban Regional Systems in Developing Countries written by George Chadwick and published by Elsevier. This book was released on 2016-01-22 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is concerned with the understanding of the structure and behaviour of urban and regional systems in developing countries. Professor Chadwick considers not only how such systems change, but also how they might be changed by some form of manipulation. Both these purposes necessarily involve the activity of modelling the systems concerned. This study has been enriched by the author's own experience in Bahrain, Hong Kong, Korea and Saudi Arabia.
Download or read book Models in Ecosystem Science written by Charles D. Canham and published by Princeton University Press. This book was released on 2021-04-13 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative models are crucial to almost every area of ecosystem science. They provide a logical structure that guides and informs empirical observations of ecosystem processes. They play a particularly crucial role in synthesizing and integrating our understanding of the immense diversity of ecosystem structure and function. Increasingly, models are being called on to predict the effects of human actions on natural ecosystems. Despite the widespread use of models, there exists intense debate within the field over a wide range of practical and philosophical issues pertaining to quantitative modeling. This book--which grew out of a gathering of leading experts at the ninth Cary Conference--explores those issues. The book opens with an overview of the status and role of modeling in ecosystem science, including perspectives on the long-running debate over the appropriate level of complexity in models. This is followed by eight chapters that address the critical issue of evaluating ecosystem models, including methods of addressing uncertainty. Next come several case studies of the role of models in environmental policy and management. A section on the future of modeling in ecosystem science focuses on increasing the use of modeling in undergraduate education and the modeling skills of professionals within the field. The benefits and limitations of predictive (versus observational) models are also considered in detail. Written by stellar contributors, this book grants access to the state of the art and science of ecosystem modeling.
Download or read book Models for Managing Regional Water Quality written by Robert Dorfman and published by Harvard University Press. This book was released on 1972 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Formulation Simplified written by Mark J. Anderson and published by Taylor & Francis. This book was released on 2018-04-17 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many chemists – especially those most brilliant in their field – fail to appreciate the power of planned experimentation. They dislike the mathematical aspects of statistical analysis. In addition, these otherwise very capable chemists also dismissed predictive models based only on empirical data. Ironically, in the hands of subject matter experts like these elite chemists, the statistical methods of mixture design and analysis provide the means for rapidly converging on optimal compositions. What differentiates Formulation Simplified from the standard statistical texts on mixture design is that the authors make the topic relatively easy and fun to read. They provide a whole new collection of insighful original studies that illustrate the essentials of mixture design and analysis. Solid industrial examples are offered as problems at the end of many chapters for those who are serious about trying new tools on their own. Statistical software to do the computations can be freely accessed via a web site developed in support of this book.
Download or read book Input Output Analysis written by Ronald E. Miller and published by Cambridge University Press. This book was released on 2022-01-13 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This essential reference for students and scholars in the input-output research and applications community has been fully revised and updated to reflect important developments in the field. Expanded coverage includes construction and application of multiregional and interregional models, including international models and their application to global economic issues such as climate change and international trade; structural decomposition and path analysis; linkages and key sector identification and hypothetical extraction analysis; the connection of national income and product accounts to input-output accounts; supply and use tables for commodity-by-industry accounting and models; social accounting matrices; non-survey estimation techniques; and energy and environmental applications. Input-Output Analysis is an ideal introduction to the subject for advanced undergraduate and graduate students in many scholarly fields, including economics, regional science, regional economics, city, regional and urban planning, environmental planning, public policy analysis and public management.
Download or read book Basic and Intermediate NX4 Modeling Drafting and Assemblies written by and published by Design Visionaries. This book was released on 2006 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regional Science in Developing Countries written by Manas Chatterji and published by Springer. This book was released on 2016-07-27 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing countries are suffering from the multiple and overlapping problems of poverty, malnutrition, excessive population growth and also the increased environmental pollution due to rapid industrialization and urbanization, particularly in the existing urban centres. The migration from rural areas of agricultural population to urban areas is making this situation more problematic. The lack of established institutions leads to the failure of public policy no matter how efficiently it is formulated. The book discusses the major regional developmental problems in poor countries, covering economic, social and environmental problems. It deals with case-studies for a set of individual countries, and discusses their unique problems, investigating how the established methods of regional science can be used to solve some of these problems.
Download or read book Geosimulation written by Itzhak Benenson and published by John Wiley & Sons. This book was released on 2004-08-20 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosimulation is hailed as ‘the next big thing’ in geographic modelling for urban studies. This book presents readers with an overview of this new and innovative field by introducing the spatial modelling environment and describing the latest research and development using cellular automata and multi-agent systems. Extensive case studies and working code is available from an associated website which demonstrate the technicalities of geosimulation, and provide readers with the tools to carry out their own modelling and testing. The first book to treat urban geosimulation explicitly, integrating socio-economic and environmental modelling approaches Provides the reader with a sound theoretical base in the science of geosimulation as well as applied material on the construction of geosimulation models Cross-references to an author-maintained associated website with downloadable working code for readers to apply the models presented in the book Visit the Author's Website for further information on Geosimulation, Geographic Automata Systems and Geographic Automata Software http://www.geosimulationbook.com
Download or read book Developments in the Formulation and Reinforcement of Concrete written by Sidney Mindess and published by Woodhead Publishing. This book was released on 2019-06-14 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in the Formulation and Reinforcement of Concrete, Second Edition, presents the latest developments on topics covered in the first edition. In addition, it includes new chapters on supplementary cementitious materials, mass concrete, the sustainably of concrete, service life prediction, limestone cements, the corrosion of steel in concrete, alkali-aggregate reactions, and concrete as a multiscale material. The book's chapters introduce the reader to some of the most important issues facing today's concrete industry. With its distinguished editor and international team of contributors, users will find this to be a must-have reference for civil and structural engineers. - Summarizes a wealth of recent research on structural concrete, including material microstructure, concrete types, and variation and construction techniques - Emphasizes concrete mixture design and applications in civil and structural engineering - Reviews modern concrete materials and novel construction systems, such as the precast industry and structures requiring high-performance concrete
Download or read book The Classical Stefan Problem written by S.C. Gupta and published by Elsevier. This book was released on 2003-10-22 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume emphasises studies related to classical Stefan problems. The term "Stefan problem" is generally used for heat transfer problems with phase-changes such as from the liquid to the solid. Stefan problems have some characteristics that are typical of them, but certain problems arising in fields such as mathematical physics and engineering also exhibit characteristics similar to them. The term ``classical" distinguishes the formulation of these problems from their weak formulation, in which the solution need not possess classical derivatives. Under suitable assumptions, a weak solution could be as good as a classical solution. In hyperbolic Stefan problems, the characteristic features of Stefan problems are present but unlike in Stefan problems, discontinuous solutions are allowed because of the hyperbolic nature of the heat equation. The numerical solutions of inverse Stefan problems, and the analysis of direct Stefan problems are so integrated that it is difficult to discuss one without referring to the other. So no strict line of demarcation can be identified between a classical Stefan problem and other similar problems. On the other hand, including every related problem in the domain of classical Stefan problem would require several volumes for their description. A suitable compromise has to be made. The basic concepts, modelling, and analysis of the classical Stefan problems have been extensively investigated and there seems to be a need to report the results at one place. This book attempts to answer that need.
Download or read book Population and Land Use in Developing Countries written by National Research Council and published by National Academies Press. This book was released on 1993-02-01 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable book summarizes recent research by experts from both the natural and social sciences on the effects of population growth on land use. It is a useful introduction to a field in which little quantitative research has been conducted and in which there is a great deal of public controversy. The book includes case studies of African, Asian, and Latin American countries that demonstrate the varied effects of population growth on land use. Several general chapters address the following timely questions: What is meant by land use change? Why are ecological research and population studies so different? What are the implications for sustainable growth in agricultural production? Although much work remains to be done in quantifying the causal connections between demographic and land use changes, this book provides important insights into those connections, and it should stimulate more work in this area.
Download or read book Cutting Edge Technologies And Microcomputer Applications For Developing Countries written by Tien-tung Hsueh and published by Routledge. This book was released on 2019-04-08 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is based on a conference on the applications of microcomputers in development sponsored by the U.S. Agency for International Development and the U.S. National Academy of Sciences in collaboration with a host country.
Download or read book Formulation of the 2002 Farm Bill written by United States. Congress. House. Committee on Agriculture and published by . This book was released on 2001 with total page 1700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Individual based Model Formulation for Cutthroat Trout Little Jones Creek California written by Steven Floyd Railsback and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
