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Book Synopsis Designing High-Density Cities by : Edward Ng
Download or read book Designing High-Density Cities written by Edward Ng and published by Earthscan. This book was released on 2009-12-16 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compact living is sustainable living. High-density cities can support closer amenities, encourage reduced trip lengths and the use of public transport and therefore reduce transport energy costs and carbon emissions. High-density planning also helps to control the spread of urban suburbs into open lands, improves efficiency in urban infrastructure and services, and results in environmental improvements that support higher quality of life in cities. Encouraging, even requiring, higher density urban development is a major policy and a central principle of growth management programmes used by planners around the world. However, such density creates design challenges and problems. A collection of experts in each of the related architectural and planning areas examines these environmental and social issues, and argues that high-density cities are a sustainable solution. It will be essential reading for anyone with an interest in sustainable urban development.
Download or read book Power Density written by Vaclav Smil and published by MIT Press. This book was released on 2015-06-05 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first systematic, quantitative appraisal of power density, offering detailed reviews of power densities of renewable energy flows, fossil fuels, and all common energy uses. “There's no author whose books I look forward to more than Vaclav Smil.” —Bill Gates In this book, Vaclav Smil argues that power density is a key determinant of the nature and dynamics of energy systems. Any understanding of complex energy systems must rely on quantitative measures of many fundamental variables. Power density—the rate of energy flux per unit of area—is an important but largely overlooked measure. Smil provides the first systematic, quantitative appraisal of power density, offering detailed reviews of the power densities of renewable energy flows, fossil fuels, thermal electricity generation, and all common energy uses. Smil shows that careful quantification, critical appraisals, and revealing comparisons of power densities make possible a deeper understanding of the ways we harness, convert, and use energies. Conscientious assessment of power densities, he argues, proves particularly revealing when contrasting the fossil fuel–based energy system with renewable energy conversions. Smil explains that modern civilization has evolved as a direct expression of the high power densities of fossil fuel extraction. He argues that our inevitable (and desirable) move to new energy arrangements involving conversions of lower-density renewable energy sources will require our society—currently dominated by megacities and concentrated industrial production—to undergo a profound spatial restructuring of its energy system.
Book Synopsis Density-Functional Theory of Atoms and Molecules by : Robert G. Parr
Download or read book Density-Functional Theory of Atoms and Molecules written by Robert G. Parr and published by Oxford University Press. This book was released on 1994-05-26 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a rigorous, unified account of the fundamental principles of the density-functional theory of the electronic structure of matter and its applications to atoms and molecules. Containing a detailed discussion of the chemical potential and its derivatives, it provides an understanding of the concepts of electronegativity, hardness and softness, and chemical reactivity. Both the Hohenberg-Kohn-Sham and the Levy-Lieb derivations of the basic theorems are presented, and extensive references to the literature are included. Two introductory chapters and several appendices provide all the background material necessary beyond a knowledge of elementary quantum theory. The book is intended for physicists, chemists, and advanced students in chemistry.
Book Synopsis What Floats? What Sinks? by : Jennifer Boothroyd
Download or read book What Floats? What Sinks? written by Jennifer Boothroyd and published by Lerner Publications TM. This book was released on 2017-08-01 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! A rock sinks in the water. A hot air balloon floats in the air. Many objects float and sink. But what makes them move this way? And how do people use floating and sinking in their lives? Read this book to find out! Learn all about matter, energy, and forces in the Exploring Physical Science series—part of the Lightning Bolt BooksTM collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt BooksTM bring nonfiction topics to life!
Book Synopsis Many-Electron Densities and Reduced Density Matrices by : Jerzy Cioslowski
Download or read book Many-Electron Densities and Reduced Density Matrices written by Jerzy Cioslowski and published by Springer Science & Business Media. This book was released on 2000-09-30 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science advances by leaps and bounds rather than linearly in time. I t is not uncommon for a new concept or approach to generate a lot of initial interest, only to enter a quiet period of years or decades and then suddenly reemerge as the focus of new exciting investigations. This is certainly the case of the reduced density matrices (a k a N-matrices or RDMs), whose promise of a great simplification of quantum-chemical approaches faded away when the prospects of formulating the auxil iary yet essential N-representability conditions turned quite bleak. How ever, even during the period that followed this initial disappointment, the 2-matrices and their one-particle counterparts have been ubiquitous in the formalisms of modern electronic structure theory, entering the correlated-level expressions for the first-order response properties, giv ing rise to natural spinorbitals employed in the configuration interaction method and in rigorous analysis of electronic wavefunctions, and al lowing direct calculations of ionization potentials through the extended Koopmans'theorem. The recent research of Nakatsuji, Valdemoro, and Mazziotti her alds a renaissance of the concept of RDlvls that promotes them from the role of interpretive tools and auxiliary quantities to that of central variables of new electron correlation formalisms. Thanks to the economy of information offered by RDMs, these formalisms surpass the conven tional approaches in conciseness and elegance of formulation. As such, they hold the promise of opening an entirely new chapter of quantum chemistry.
Book Synopsis Practical Density Measurement and Hydrometry by : S.V Gupta
Download or read book Practical Density Measurement and Hydrometry written by S.V Gupta and published by CRC Press. This book was released on 2002-07-21 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of the ISO 9000 quality standard resulted in renewed interest and pressure on industry to strengthen their quality and metrology standards. To meet this renewed interest Practical Density Measurement and Hydrometry provides invaluable, contemporary information on mass metrology. The book highlights the principles of physics involved and the technology needed to accurately measure the density of solids and liquids to high precision to meet the increasing demands on the metrology industry. Starting with national and international density standards, the book proceeds to discuss the variety of methods used to accurately measure solid and liquid density, to compare and contrast these techniques, and to thoroughly explain the thermal dilation of liquids. It also examines interferometers used in dimensional measurements of solid-based density standards, corrections applicable due to finite aperture, phase change due to reflection and ringing, and special methods for density determination. The final chapters detail specific points of relevance to density measurements and hydrometry for materials commonly used in industry. Complimented with practical guidance on applying these measurement techniques, calibration procedures, and data tables, this book is an essential reference for metrologists and a valuable introduction for graduate students.
Download or read book What is Density? written by Joanne Barkan and published by Children's Press(CT). This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains what density is, using examples from a birthday party--such as a room filling with people, a floating balloon, and the bubbles in a cup of soda--to illustrate the concept.
Book Synopsis Density Waves In Solids by : George Gruner
Download or read book Density Waves In Solids written by George Gruner and published by CRC Press. This book was released on 2018-03-08 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: ?Density Waves in Solids is written for graduate students and scientists interested in solid-state sciences. It discusses the theoretical and experimental state of affairs of two novel types of broken symmetry ground states of metals, charge, and spin density waves. These states arise as the consequence of electron-phonon and electron-electron interactions in low-dimensional metals.Some fundamental aspects of the one-dimensional electron gas, and of the materials with anisotropic properties, are discussed first. This is followed by the mean field theory of the phases transitions?discussed using second quantized formalism?together with the various experimental observations on the transition and on the ground states. Fluctuation effects and the collective excitations are reviewed next, using the Ginzburg-Landau formalism, followed by the review of the interaction of these states with the underlying lattice and with impurities. The final chapters are devoted to the response of the ground states to external perturbations.
Book Synopsis Interlevel Correlations of Temperature and Density, Surface to 60 Km by : Allen E. Cole
Download or read book Interlevel Correlations of Temperature and Density, Surface to 60 Km written by Allen E. Cole and published by . This book was released on 1980 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statistical techniques have been developed which can be used to determine the effect of density and temperature on the trajectories of reentry vehicles for altitudes between the surface and 60 km. Arrays of monthly means and standard deviations of density and temperature at 2-km intervals of altitude to 60 km, together with interlevel coefficients of correlation of density with density and temperature, are provided for the mid-season months (January, April, July, October) at 10 locations between latitudes 8 deg. and 64 deg. N. These data are in format that can be easily used to estimate the distributions of vertical density and temperature gradients and the effects of day-to-day density variations on the trajectories of reentry vehicles.
Author :ASTM Committee D-18 on Soils for Engineering Purposes Publisher :ASTM International ISBN 13 : Total Pages :113 pages Book Rating :4./5 ( download)
Book Synopsis Symposium on Nuclear Methods for Measuring Soil Density and Moisture by : ASTM Committee D-18 on Soils for Engineering Purposes
Download or read book Symposium on Nuclear Methods for Measuring Soil Density and Moisture written by ASTM Committee D-18 on Soils for Engineering Purposes and published by ASTM International. This book was released on 1961 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annotated Bibliography of Studies on the Density and Other Volumetric Properties for Major Components in Geothermal Waters, 1928-1974 by : Robert W. Potter
Download or read book Annotated Bibliography of Studies on the Density and Other Volumetric Properties for Major Components in Geothermal Waters, 1928-1974 written by Robert W. Potter and published by . This book was released on 1975 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Density Functional Theory by : John F. Dobson
Download or read book Electronic Density Functional Theory written by John F. Dobson and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outcome of the International Workshop on Electronic Density Functional Theory, held at Griffith University in Brisbane, Australia, in July 1996. Density functional theory, standing as it does at the boundary between the disciplines of physics, chemistry, and materials science, is a great mixer. Invited experts from North America, Europe, and Australia mingled with students from several disciplines, rapidly taking up the informal style for which Australia is famous. A list of participants is given at the end of the book. Density functional theory (DFT) is a subtle approach to the very difficult problem of predicting the behavior of many interacting particles. A major application is the study of many-electron systems. This was the workshop theme, embracing inter alia computational chemistry and condensed matter physics. DFT circumvents the more conceptually straightforward (but more computationally intensive) approach in which one solves the many-body Schrodinger equation. It relies instead on rather delicate considerations involving the electron number density. For many years the pioneering work of Kohn and Sham (the Local Density Ap proximation of 1965 and immediate extensions) represented the state of the art in DFT. This approach was widely used for its appealing simplicity and computability, but gave rather modest accuracy. In the last few years there has been a renaissance of interest, quite largely due to the remarkable success of the new generation of gradient functionals whose initiators include invitees to the workshop (Perdew, Parr, Yang).
Book Synopsis Variations with Season and Latitude of Density, Temperature, and Composition in the Lower Thermosphere by : K. S. W. Champion
Download or read book Variations with Season and Latitude of Density, Temperature, and Composition in the Lower Thermosphere written by K. S. W. Champion and published by . This book was released on 1967 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of neutral density data has made it possible to extend curves of mean density as a function of latitude and season from 90 to 120 km. There is an approximate isopycnic point at 91 km. Above this point the density variations are reversed from what they are at 80 km. In other words, at 120 km the density in summer and at the tropics is lower than that in CIRA 1965 and in winter the density is higher. The density curves have been idealized near 120 km to join at one of three points. These correspond to typical summer and tropical conditions, winter conditions, and spring/autumn conditions. The summer density is 20 percent below that of the U.S. Standard, the winter density is 50 percent above the Standard and the spring/autumn density is 1 percent above the Standard. By application of appropriate theory the corresponding variations in temperature and mean molecular weight have been calculated. An unexpected result of the theory is the prediction of a seasonal variation of the mean molecular weight. Some of the data presented in the paper have been analyzed since the models were derived. These data have been found to be acceptably close to the models. (Author).
Book Synopsis Density-Functional Methods for Excited States by : Nicolas Ferré
Download or read book Density-Functional Methods for Excited States written by Nicolas Ferré and published by Springer. This book was released on 2015-08-26 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students
Book Synopsis Effects of Variations in Bulk Density on Coking Time by : John B. Gayle
Download or read book Effects of Variations in Bulk Density on Coking Time written by John B. Gayle and published by . This book was released on 1954 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Water Temperature and Density by : National Ocean Survey
Download or read book Surface Water Temperature and Density written by National Ocean Survey and published by . This book was released on 1960 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field Use of the Beach Erosion Board In-place Sediment Density Probe by :
Download or read book Field Use of the Beach Erosion Board In-place Sediment Density Probe written by and published by . This book was released on 1960 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
