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Books > Science & Mathematics > Astronomy, space & time > Theoretical & mathematical astronomy

The Synthesis of the Elements - The Astrophysical Quest for Nucleosynthesis and What It Can Tell Us About the Universe... The Synthesis of the Elements - The Astrophysical Quest for Nucleosynthesis and What It Can Tell Us About the Universe (Hardcover, 2012 ed.)
Giora Shaviv
R5,059 R4,453 Discovery Miles 44 530 Save R606 (12%) Ships in 12 - 17 working days

This book describes the origins and evolution of the chemical elements we and the cosmos are made of. The story starts with the discovery of the common elements on Earth and their subsequent discovery in space. How do we learn the composition of the distant stars? How did progress in quantum theory, nuclear physics, spectroscopy, stellar structure and evolution, together with observations of stars, converge to provide an incredibly detailed picture of the universe? How does research in the micro-world explain the macro-world? How does progress in one affect the other, or lack of knowledge in one inhibit progress in the other? In short, Shaviv describes how we discovered the various pieces of the jigsaw that form our present picture of the universe; and how we sometimes put these in the wrong place before finding in the right one. En route we meet some fascinating personalities and learn about heated controversies. Shaviv shows how science lurched from one dogma to the next, time and again shattering much of what had been considered solid knowledge, until eventually a stable understanding arose. Beginning with generally accepted science, the book ends in today's terra incognita of nuclear physics, astrophysics and cosmology. A monumental work that will fascinate scientists, philosophers, historians and lay readers alike.

Spectral Evolution in Blazars - The Case of CTA 102 (Hardcover, 2015 ed.): Christian Fromm Spectral Evolution in Blazars - The Case of CTA 102 (Hardcover, 2015 ed.)
Christian Fromm
R4,213 R3,393 Discovery Miles 33 930 Save R820 (19%) Ships in 12 - 17 working days

This prize-winning thesis deals with the observation and modeling of the spectral evolution of blazars. Based on single-dish light curves, a model of shock-shock interaction is tested and confirmed using multi-frequency high resolution Very Long Baseline Observations. He presents state-of-the art numerical relativistic hydrodynamic simulations and the corresponding non-thermal emission is calculated (eRHD simulations). The author further presents new analysis techniques for VLBI observations that can be applied to numerous sources and provide reliable results including an error estimate using Monte Carlo simulations. He also develops an analytical shock model that can be applied quickly to other single dish observations. He shows how novel techniques of extraction of physical parameters from observations can be applied to other astrophysical sources and provide a link to a better understanding of the physical mechanism operating in blazar jets.

Discoveries at the Frontiers of Science - From Nuclear Astrophysics to Relativistic Heavy Ion Collisions (Hardcover, 1st ed.... Discoveries at the Frontiers of Science - From Nuclear Astrophysics to Relativistic Heavy Ion Collisions (Hardcover, 1st ed. 2020)
Johannes Kirsch, Stefan Schramm, Jan Steinheimer-Froschauer, Horst Stoecker
R4,652 Discovery Miles 46 520 Ships in 10 - 15 working days

With contributions by leading theoreticians, this book presents the discoveries of hitherto hidden connections between seemingly unrelated fields of fundamental physics. The topics range from cosmology and astrophysics to nuclear-, particle- and heavy-ion science. A current example concerns the sensitivity of gravitational wave spectra to the phase structure of dense nuclear and quark matter in binary neutron star collisions. The contributions by Hanauske and Stoecker as well as Banik and Bandyopadhyay relate the consequent insights to hot dense nuclear matter created in supernova explosions and in high-energy heavy-ion collisions. Studies of the equation of state for neutron stars are also presented, as are those for nuclear matter in high-energy heavy-ion collisions. Other reviews focus on QCD-thermodynamics, charmed mesons in the quark-gluon plasma, nuclear theory, extensions to the standard general theory of relativity, new experimental developments in heavy ion collisions and renewable energy networks. The book will appeal to advanced students and researchers seeking a broad view of current challenges in theoretical physics and their interconnections.

Ptolemy in Perspective - Use and Criticism of his Work from Antiquity to the Nineteenth Century (Hardcover, 2010 ed.):... Ptolemy in Perspective - Use and Criticism of his Work from Antiquity to the Nineteenth Century (Hardcover, 2010 ed.)
Alexander Jones
R5,716 Discovery Miles 57 160 Ships in 10 - 15 working days

Ptolemy was the most important physical scientist of the Roman Empire, and for a millennium and a half his writings on astronomy, astrology, and geography were models for imitation, resources for new work, and targets of criticism. Ptolemy in Perspective traces reactions to Ptolemy from his own times to ours. The nine studies show the complex processes by which an ancient scientist and his work gained and subsequently lost an overreaching reputation and authority.

Primordial Cosmology (Hardcover): Patrick Peter, Jean-Philippe Uzan Primordial Cosmology (Hardcover)
Patrick Peter, Jean-Philippe Uzan
R3,107 Discovery Miles 31 070 Ships in 12 - 17 working days

This book aims at giving the basis of primordial cosmology. The book is self-contained in the sense that all the elements for the derivations of the presented results are given. It can be used as a textbook to study cosmology. It is divided into 3 parts. Part 1 summarizes the fundamentals in theoretical physics needed in cosmology (general relativity, field theory, particle physics). Part 2 describes the standard model of cosmology and includes cosmological solutions of Einstein equations, hot big bang model, cosmological perturbation theory, cosmic microwave background anisotropies, lensing and evidences for dark matter, and inflation. Part 3 describes extensions of this model and opens up to today's research in the field: scalar-tensor theories, supersymetry, the cosmological constant problem and acceleration of the universe, topology of the universe, grand unification and baryogenesis, topological defects and phase transitions, string inspired cosmology including branes and latest developments. The book provides details of all derivations and leads the student up to the level of research articles.

From the Universe to the Elementary Particles - A First Introduction to Cosmology and the Fundamental Interactions (Hardcover,... From the Universe to the Elementary Particles - A First Introduction to Cosmology and the Fundamental Interactions (Hardcover, 2012)
Ulrich Ellwanger
R1,598 Discovery Miles 15 980 Ships in 12 - 17 working days

In this book, the author leads the reader, step by step and without any advanced mathematics, to a clear understanding of the foundations of modern elementary particle physics and cosmology. He also addresses current and controversial questions on topics such as string theory. The book contains gentle introductions to the theories of special and general relativity, and also classical and quantum field theory. The essential aspects of these concepts are understood with the help of simple calculations; for example, the force of gravity as a consequence of the curvature of the space-time. Also treated are the Big Bang, dark matter and dark energy, as well as the presently known interactions of elementary particles: electrodynamics, the strong and the weak interactions including the Higgs boson. Finally, the book sketches as yet speculative theories: Grand Unification theories, supersymmetry, string theory and the idea of additional dimensions of space-time. Since no higher mathematical or physics expertise is required, the book is also suitable for college and university students at the beginning of their studies. Hobby astronomers and other science enthusiasts seeking a deeper insight than can be found in popular treatments will also appreciate this unique book.

Astrophysics of the Interstellar Medium (Hardcover, 2013 ed.): Walter J. Maciel Astrophysics of the Interstellar Medium (Hardcover, 2013 ed.)
Walter J. Maciel
R4,434 Discovery Miles 44 340 Ships in 12 - 17 working days

The space between the stars contains a large diversity of objects in which physical processes occur that are fundamental to the structure and evolution of galaxies. This book offers the reader a basic knowledge of these processes and presents simple numeric estimates of the main quantities relevant to the interstellar medium. The main objects that constitute the interstellar space are described, but the emphasis of the book lies in the physical processes occurring in these objects, which may also occur in other astrophysical environments. The book is directed tor graduate as well as advanced undergraduate students of physics and astrophysics.

Life on Earth and other Planetary Bodies (Hardcover, 2012 ed.): Arnold Hanslmeier, Stephan Kempe, Joseph Seckbach Life on Earth and other Planetary Bodies (Hardcover, 2012 ed.)
Arnold Hanslmeier, Stephan Kempe, Joseph Seckbach
R5,045 R4,439 Discovery Miles 44 390 Save R606 (12%) Ships in 12 - 17 working days

A trio of editors [Professors from Austria, Germany and Israel] present Life on Earth and other Planetary Bodies. The contributors are from twenty various countries and present their research on life here as well as the possibility for extraterrestrial life. This volume covers concepts such as life's origin, hypothesis of Panspermia and of life possibility in the Cosmos. The topic of extraterrestrial life is currently 'hot' and the object of several congresses and conferences. While the diversity of "normal" biota is well known, life on the edge of the extremophiles is more limited and less distributed. Other subjects discussed are Astrobiology with the frozen worlds of Mars, Europa and Titan where extant or extinct microbial life may exist in subsurface oceans; conditions on icy Mars with its saline, alkaline, and liquid water which has been recently discovered; chances of habitable Earth-like [or the terrestrial analogues] exoplanets; and SETI's search for extraterrestrial Intelligence.

Introduction to General Relativity and Cosmology (Second Edition) (Hardcover, 2nd edition): Ian R. Kenyon Introduction to General Relativity and Cosmology (Second Edition) (Hardcover, 2nd edition)
Ian R. Kenyon
R2,130 Discovery Miles 21 300 Ships in 12 - 17 working days
Fifty Years of Quasars - From Early Observations and Ideas to Future Research (Hardcover, 2012 ed.): Mauro D'Onofrio,... Fifty Years of Quasars - From Early Observations and Ideas to Future Research (Hardcover, 2012 ed.)
Mauro D'Onofrio, Paola Marziani, Jack W. Sulentic
R4,443 Discovery Miles 44 430 Ships in 12 - 17 working days

The 50th anniversary of the discovery of quasars in 1963 presents an interesting opportunity to ask questions about the current state of quasar research. Formatted as a series of interviews with noted researchers in the field, each of them asked to address a specific set of questions covering topics selected by the editors, this book deals with the historical development of quasar research and discusses how advances in instrumentation and computational capabilities have benefitted quasar astronomy and have changed our basic understanding of quasars. In the last part of the book the interviews address the current topic of the role of quasars in galaxy evolution. They summarise open issues in understanding active galactic nuclei and quasars and present an outlook regarding what future observational facilities both on the ground and in space might reveal.

Its interview format, the fascinating topic of quasars and black holes, and the lively recollections and at times controversial views of the contributors make this book both rewarding and a pleasure to read

Keplerian Ellipses (Second Edition) - A student guide to the physics of the gravitational two-body problem (Hardcover, 2nd... Keplerian Ellipses (Second Edition) - A student guide to the physics of the gravitational two-body problem (Hardcover, 2nd edition)
Bruce Cameron Reed
R2,134 Discovery Miles 21 340 Ships in 12 - 17 working days
Theoretical Foundations Of Cosmology: Introduction To The Global Structure Of Space-time (Hardcover): Michael Heller Theoretical Foundations Of Cosmology: Introduction To The Global Structure Of Space-time (Hardcover)
Michael Heller
R1,866 Discovery Miles 18 660 Ships in 12 - 17 working days

The book's principal aim is to clarify fundamental concepts, decipher mathematical structures used to model space-time and relativistic worlds, and to disclose their physical meaning. After each chapter, philosophical implications of the presented material are commented upon.Both special and general theories of relativity are presented in the book with the stress on their global aspects. Although global mathematical methods are extensively used throughout the book, the definitions of new concepts, short comments and examples make reading smooth without the need to consult other textbooks or review papers.

1st Karl Schwarzschild Meeting on Gravitational Physics (Hardcover, 1st ed. 2016): Piero Nicolini, Matthias Kaminski, Jonas... 1st Karl Schwarzschild Meeting on Gravitational Physics (Hardcover, 1st ed. 2016)
Piero Nicolini, Matthias Kaminski, Jonas Mureika, Marcus Bleicher
R5,265 R4,935 Discovery Miles 49 350 Save R330 (6%) Ships in 12 - 17 working days

These proceedings collect the selected contributions of participants of the First Karl Schwarzschild Meeting on Gravitational Physics, held in Frankfurt, Germany to celebrate the 140th anniversary of Schwarzschild's birth. They are grouped into 4 main themes: I. The Life and Work of Karl Schwarzschild; II. Black Holes in Classical General Relativity, Numerical Relativity, Astrophysics, Cosmology, and Alternative Theories of Gravity; III. Black Holes in Quantum Gravity and String Theory; IV. Other Topics in Contemporary Gravitation. Inspired by the foundational principle ``By acknowledging the past, we open a route to the future", the week-long meeting, envisioned as a forum for exchange between scientists from all locations and levels of education, drew participants from 15 countries across 4 continents. In addition to plenary talks from leading researchers, a special focus on young talent was provided, a feature underlined by the Springer Prize for the best student and junior presentations.

Damage Mechanics of Composite Materials, Volume 9 (Hardcover): R. Talreja Damage Mechanics of Composite Materials, Volume 9 (Hardcover)
R. Talreja
R1,988 Discovery Miles 19 880 Ships in 12 - 17 working days

Damage mechanics is concerned with mechanics-based analyses of microstructural events in solids responsible for changes in their response to external loading. The microstructural events can occur as cracks, voids, slipped regions, etc., with a spatial distribution within the volume of a solid. If a solid contains oriented elements in its microsctructure, e.g. fibers, the heterogeneity and asisotropy aspects create situations which form a class of problems worthy of special treatment. This book deals with such treatments with particular emphasis on application to technological composite materials.

Chapter one describes the basic principles underlying both the micromechanics approach and the continuum damage mechanics approach. It also reviews the relevant statistical concepts. The next three chapters are devoted to developments of the continuum damage mechanics approach related to characterization of damage with internal variables, evolution of damage and its coupling with other inelastic effects such as plasticity. Chapter 5 describes observations of damage from notches in composite laminates and puts forward some pragmatic modelling ideas for a complex damage configuration. The next two chapters form the bulk of the micromechanics approach in this volume. The first one deals with microcracking and the other with interfacial damage in composite materials.

The Dynamical Behaviour of Our Planetary System - Proceedings of the Fourth Alexander von Humboldt Colloquium on Celestial... The Dynamical Behaviour of Our Planetary System - Proceedings of the Fourth Alexander von Humboldt Colloquium on Celestial Mechanics (Hardcover, Partly Reprinted from Celestia ed.)
R. Dvorak, Jacques Henrard
R2,522 Discovery Miles 25 220 Ships in 12 - 17 working days

The papers in this volume cover a large range of questions concerning the dynamics of objects of the solar system, from theoretical Hamiltonian mechanics to the study of the dynamical behaviour of specific objects, with a strong emphasis on the detection, causes and effects of chaotic behaviour. Several papers describe contributions in two topics which are considered as a major breakthrough in numerical dynamics: symplectic methods of numerical integration of Hamiltonian systems, and methods for spectral analysis of numerically computed orbits leading to refined tools for the detection and evaluation of chaos. The dynamics of the asteroid belt and other small objects, a fast-moving topic with important implications for the origin and evolution of the Solar System, is also extensively covered.

Information Handling in Astronomy (Hardcover, 2000 ed.): Andre Heck Information Handling in Astronomy (Hardcover, 2000 ed.)
Andre Heck
R3,018 Discovery Miles 30 180 Ships in 10 - 15 working days

The pilot boat just moved away and'its lights are already fading towards the coast of Northeastern Queensland over which Saturn is going to set. There is still quite some time to go before dawn. The big ship has now regained her cruise speed following its roughly northwesterly route in the South Coral Sea along the chain of nearby reefs. Few people are around at this time, except a dozen early birds sharing some 'shipshaping' exercise on the top deck and taking advantage of the relative coolness of the night. On my way down to the stateroom, I cannot but stop once more in front of that elegant composition by British artist Brigid Collins (1963-) hanging in the monumental staircase between Decks 7 and 8. That piece 2 of art, a 1.8x 1.8m oil on canvas plus collage entitled Berinl in honour of the Danish explorer, gathers together many navigation-related themes of the time: Suns, Moons, planets, sky maps, astrolabes, small telescopes, as well as drawings, diagrams and charts of all kinds. It is somehow a digest of how astronomical information was then collected, made available, and used.

General Relativity, Cosmology and Astrophysics - Perspectives 100 years after Einstein's stay in Prague (Hardcover, 2014... General Relativity, Cosmology and Astrophysics - Perspectives 100 years after Einstein's stay in Prague (Hardcover, 2014 ed.)
Jiri Bicak, Tomas Ledvinka
R4,832 R3,749 Discovery Miles 37 490 Save R1,083 (22%) Ships in 12 - 17 working days

The articles included in this Volume represent a broad and highly qualified view on the present state of general relativity, quantum gravity, and their cosmological and astrophysical implications. As such, it may serve as a valuable source of knowledge and inspiration for experts in these fields, as well as an advanced source of information for young researchers.
The occasion to gather together so many leading experts in the field was to celebrate the centenary of Einstein's stay in Prague in 1911-1912. It was in fact during his stay in Prague that Einstein started in earnest to develop his ideas about general relativity that fully developed in his paper in 1915.
Approaching soon the centenary of his famous paper, this volume offers a precious overview of the path done by the scientific community in this intriguing and vibrant field in the last century, defining the challenges of the next 100 years.
The content is divided into four broad parts: (i) Gravity and Prague, (ii) Classical General Relativity, (iii) Cosmology and Quantum Gravity, and (iv) Numerical Relativity and Relativistic Astrophysics.

Questioning the Foundations of Physics - Which of Our Fundamental Assumptions Are Wrong? (Hardcover, 2015 ed.): Anthony... Questioning the Foundations of Physics - Which of Our Fundamental Assumptions Are Wrong? (Hardcover, 2015 ed.)
Anthony Aguirre, Brendan Foster, Zeeya Merali
R3,248 R1,972 Discovery Miles 19 720 Save R1,276 (39%) Ships in 12 - 17 working days

The essays in this book look at way in which the fundaments of physics might need to be changed in order to make progress towards a unified theory. They are based on the prize-winning essays submitted to the FQXi essay competition "Which of Our Basic Physical Assumptions Are Wrong?", which drew over 270 entries. As Nobel Laureate physicist Philip W. Anderson realized, the key to understanding nature's reality is not anything "magical", but the right attitude, "the focus on asking the right questions, the willingness to try (and to discard) unconventional answers, the sensitive ear for phoniness, self-deception, bombast, and conventional but unproven assumptions." The authors of the eighteen prize-winning essays have, where necessary, adapted their essays for the present volume so as to (a) incorporate the community feedback generated in the online discussion of the essays, (b) add new material that has come to light since their completion and (c) to ensure accessibility to a broad audience of readers with a basic grounding in physics. The Foundational Questions Institute, FQXi, catalyzes, supports, and disseminates research on questions at the foundations of physics and cosmology, particularly new frontiers and innovative ideas integral to a deep understanding of reality, but unlikely to be supported by conventional funding sources.

Shape Dynamics - Relativity and Relationalism (Hardcover): Flavio Mercati Shape Dynamics - Relativity and Relationalism (Hardcover)
Flavio Mercati
R3,503 Discovery Miles 35 030 Ships in 12 - 17 working days

This textbook on the nature of space and time explains the new theory of Space Dynamics, which describes the dynamics of gravity as the evolution of conformal 3-dimensional geometry. Shape Dynamics is equivalent to Einstein's General Relativity in those situations in which the latter has been tested experimentally, but the theory is based on different first principles. It differs from General Relativity in certain extreme conditions. Shape Dynamics allows us to describe situations in which the spacetime picture is no longer adequate, such as in the presence of singularities, when the idealization of infinitesimal rods measuring scales and infinitesimal clocks measuring proper time fails. This tutorial book contains both a quick introduction for readers curious about Shape Dynamics, and a detailed walk-through of the historical and conceptual motivations for the theory, its logical development from first principles and a description of its present status. It includes an explanation of the origin of the theory, starting from problems posed first by Newton more than 300 years ago. The book will interest scientists from a large community including all foundational fields of physics, from quantum gravity to cosmology and quantum foundations, as well as researchers interested in foundations. The tutorial is sufficiently self-contained for students with some basic background in Lagrangian/Hamiltonian mechanics and General Relativity.

Development of a Numerical Simulation Method for Rocky Body Impacts and Theoretical Analysis of Asteroidal Shapes (Hardcover,... Development of a Numerical Simulation Method for Rocky Body Impacts and Theoretical Analysis of Asteroidal Shapes (Hardcover, 1st ed. 2020)
Keisuke Sugiura
R4,067 Discovery Miles 40 670 Ships in 12 - 17 working days

This book describes numerical simulations of collisions between asteroids, based on a unique numerical code developed by the author. The code accurately solves the elastic dynamic equations and describes the effects of fracture and friction, which makes it possible to investigate the shapes of impact outcomes produced by asteroid collisions and subsequent gravitational accumulation of fragments. The author parallelizes the code with high parallelization efficiency; accordingly, it can be used to conduct high-resolution simulations with the aid of supercomputers and clarify the shapes of small remnants produced through the catastrophic destruction of asteroids. The author demonstrates that flat asteroids can only be produced by impacts involving objects with similar mass and low velocity, which suggests that the flat asteroids in our solar system were created in the planet formation era and have kept their shapes until today. The author also shows that asteroid collisions under certain conditions can produce the extremely elongated shape of an interstellar minor body, 1I/'Oumuamua. In brief, the book offers a comprehensive investigation of asteroid impacts and shapes, making it a uniquely valuable resource.

Astronomy at High Angular Resolution - A Compendium of Techniques in the Visible and Near-Infrared (Hardcover, 1st ed. 2016):... Astronomy at High Angular Resolution - A Compendium of Techniques in the Visible and Near-Infrared (Hardcover, 1st ed. 2016)
Henri M. J. Boffin, Gaitee Hussain, Jean-Philippe Berger, Linda Schmidtobreick
R3,417 Discovery Miles 34 170 Ships in 10 - 15 working days

This book offers an essential compendium of astronomical high-resolution techniques. Recent years have seen considerable developments in such techniques, which are critical to advances in many areas of astronomy. As reflected in the book, these techniques can be divided into direct methods, interferometry, and reconstruction methods, and can be applied to a huge variety of astrophysical systems, ranging from planets, single stars and binaries to active galactic nuclei, providing angular resolution in the micro- to tens of milliarcsecond scales. Written by experts in their fields, the chapters cover adaptive optics, aperture masking imaging, spectra disentangling, interferometry, lucky imaging, Roche tomography, imaging with interferometry, interferometry of AGN, AGN reverberation mapping, Doppler- and magnetic imaging of stellar surfaces, Doppler tomography, eclipse mapping, Stokes imaging, and stellar tomography. This book is intended to enable a next generation of astronomers to apply high-resolution techniques. It informs readers on how to achieve the best angular resolution in the visible and near-infrared regimes from diffraction-limited to micro-arcsecond scales.

Information Handling in Astronomy - Historical Vistas (Hardcover, 2003 ed.): Andre Heck Information Handling in Astronomy - Historical Vistas (Hardcover, 2003 ed.)
Andre Heck
R2,922 Discovery Miles 29 220 Ships in 10 - 15 working days

This book offers a unique review of how astronomical information handling (in the broad sense) evolved in the course of the 20th century, and especially during its second half. This volume is a natural complement to the book Information handling in astronomy published in the same series. The scope of these two volumes includes not only dealing with professional astronomical data from the collecting instruments (ground-based and space-borne) to the users/researchers, but also publishing, education and public outreach. In short, the information flow in astronomy is thus illustrated from sources (cosmic objects) to end (mankind's knowledge). The experts contributing to this book have done their best to write in a way understandable to readers not necessarily hyperspecialized in astronomy while providing specific detailed information, as well as plenty of pointers and bibliographic elements. Especially enlightening are some lessons learned' sections.

Impact of Modern Dynamics in Astronomy - Proceedings of IAU Colloquium 172 Held in Namur, Belgium, July 1998 (Hardcover, My,... Impact of Modern Dynamics in Astronomy - Proceedings of IAU Colloquium 172 Held in Namur, Belgium, July 1998 (Hardcover, My, 73:1-4 ed.)
Jacques Henrard, Sylvio Ferraz-Mello
R2,525 Discovery Miles 25 250 Ships in 12 - 17 working days

This volume of proceedings contains review and research papers concerning the impact of modern dynamics in astronomy. Modern dynamics is playing an increasing role in the solution of problems raised by astronomical observations. This new relationship is being fostered by discoveries of new systems, such as the Kuiper belt, pulsar and star companions; by progress in theoretical dynamics, like KAM and Nekhorochev theories and adiabatic invariants; and by the dissemination of fast computers. The two main areas of applications which are discussed are "stellar systems", including dynamics of galaxies, and "small bodies in the solar system". In both cases the concepts and tools of chaotic motion are considered and fully discussed.

Light Pollution: The Global View (Hardcover, 2003 ed.): H. E. Schwarz Light Pollution: The Global View (Hardcover, 2003 ed.)
H. E. Schwarz
R4,467 Discovery Miles 44 670 Ships in 12 - 17 working days

It is only since recent years that the importance of the effects of outdoor lighting on the night-time environment and on the physical and mental health of humans is recognized on a wider scale. The related issue of light pollution is a particularly complex one, with potential conflicts of interest between the utilities, environmentalists, astronomers, the lighting industry and various government departments. Energy politics are always a sensitive issue, and light pollution is no exception to this rule.

The effects of light pollution on flora, fauna -including humans and their widely varying night-time activities- are often subtle and need extensive field studies to be quantified in a sensible manner.

The present conference, initiated by Commission 50 of the International Astronomical Union, is an attempt to bring together the astronomical community, the lighting industry, end-users, the utilities, and public authorities for a discussion and an exchange of ideas and information that will create goodwill among these groups and will thus contribute to making the global efforts to reduce pollution more efficient and effective.

Radio frequency pollution was also discussed in the context of radio astronomy and its efforts to create radio-quiet zones in collaboration with the government authorities that allocate frequency bands to the various users -mainly the telecommunications industry- and to protect the major planned and present radio observatories of the world.
The 3-day conference was attended by more than 130 representatives from 12 countries of all the above-mentioned groups, and a wide range of topics was discussed.

Some of the highlights were:
The presentationof the 1st world atlas of artificial night sky brightness (Cinzano et al.); the article by the International Darksky Association on their world-wide efforts to curb light pollution (Alvarez del Castillo et al.); the laws controlling light pollution implemented in Spain (Diaz et al.) and Chile (Sanhueza et al.), an overview of the work on radio frequency protection of sites (Cohen et al.) and the excellent introduction to the topic from the Chilean point of view (Daud).

Related topics in the book are light pollution education, aircraft contrails, space advertising (with an added document provided by the relevant UN commission), and an experiment on involving the population of an entire country in measuring sky brightness, by using the internet and the media.

The text is aimed at professionals from a wide range of disciplines related to lighting and its effects on the night-time environment in the broadest sense of the word. Lay persons interested in this emerging multi-disciplinary field can also find much of interest in this book.

Spacetime - Foundations of General Relativity and Differential Geometry (Hardcover, 1st ed. 1999. Corr. 2nd printing 2001):... Spacetime - Foundations of General Relativity and Differential Geometry (Hardcover, 1st ed. 1999. Corr. 2nd printing 2001)
Marcus Kriele
R5,486 Discovery Miles 54 860 Ships in 12 - 17 working days

This textbook is for mathematicians and mathematical physicists and is mainly concerned with the physical justification of both the mathematical framework and the foundations of the theory of general relativity. Previous knowledge of the relevant physics is not assumed. This book is also suitable as an introduction to pseudo-Riemannian geometry with emphasis on geometrical concepts. A significant part of the text is devoted to the discussion of causality and singularity theorems. The insights obtained are applied to black hole astrophysics, thereby making the connection to current active research in mathematical physics and cosmology.

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