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Introduction to Modified Gravity - Albert Petrov - Bog - Springer International Publishing AG - Plusbog.dk

Introduction to Modified Gravity - Albert Petrov - Bog - Springer International Publishing AG - Plusbog.dk

This book reviews various modified gravity models, including those with modifications in the pure gravitational sector; those involving extra fields, that is, scalar-tensor and vector-tensor gravity theories; gravity models with Lorentz symmetry breaking; and nonlocal gravity models. The authors discuss both classical and quantum aspects of these theories. The book is unique in bringing together all the current alternatives to Einstein gravity in one source and serves as an excellent starting point for graduate students and other newcomers seeking an overview. This second edition has been expanded with new results from a variety of approaches including f(R,Q,P) gravity, galileon gravity and massive gravity. Extended discussions of Lorentz-breaking terms and of non-local field theory have been added and a completely new chapter is devoted to models based on non-Riemannian geometry.

DKK 426.00
1

Introduction to Modified Gravity - Albert Petrov - Bog - Springer Nature Switzerland AG - Plusbog.dk

Introduction to Modified Gravity - Albert Petrov - Bog - Springer Nature Switzerland AG - Plusbog.dk

This book reviews various modified gravity models, including those with modifications in the pure gravitational sector; those involving extra fields, that is, scalar-tensor and vector-tensor gravity theories; gravity models with Lorentz symmetry breaking; and nonlocal gravity models. The authors discuss both classical and quantum aspects of these theories. The book is unique in bringing together all the current alternatives to Einstein gravity in one source and serves as an excellent starting point for graduate students and other newcomers seeking an overview.

DKK 407.00
1

Conversations on Quantum Gravity - - Bog - Cambridge University Press - Plusbog.dk

Conversations on Quantum Gravity - - Bog - Cambridge University Press - Plusbog.dk

The holy grail of theoretical physics is to find the theory of everything that combines all the forces of nature, including gravity. This book addresses the question: how far are we from such discovery? Over the last few decades, multiple roads to finding a quantum theory of gravity have been proposed but no obvious description of nature has emerged in this domain. What is to be made of this situation? This volume probes the state-of-the art in this daunting quest of theoretical physics by collecting critical interviews with nearly forty leading theorists in this field. These broad-ranging conversations give important insights and candid opinions on the various approaches to quantum gravity, including string theory, loop quantum gravity, causal set theory and asymptotic safety. This unique, readable overview provides a gateway into cutting edge research for students and others who wish to engage with the open problem of quantum gravity.

DKK 432.00
1

Gravity in Art - - Bog - McFarland & Co Inc - Plusbog.dk

Gravity in Art - - Bog - McFarland & Co Inc - Plusbog.dk

The gravitational pull of the earth and the challenge to resist it have long inspired artists. Like the Greek vases depicting Sisyphus''s endless quest to push his boulder up a hill and the Whirlwind Lovers in Dante''s Inferno , images that portray the defiance of gravity or submission to it permeate the artistic world. This collection examines the ways artists from antiquity to today use gravity and levity symbolically, metaphorically, and expressively. The 26 essays examine these opposing forces through analysis of such dualities as ascent and descent, weight and weightlessness, hope and despair, or life and death, and draw distinct lines between the works of art and texts of such writers and thinkers as Homer, Aristotle, Newton, Marx and Einstein. Together, they demonstrate that as our ideas about this essential force or space-time concept change, so too, do artists create new ways to represent visually the phenomenon of gravity.

DKK 571.00
1

Dynamical Characteristics of Inertia-Gravity Waves in the Antarctic Mesosphere - Ryosuke Shibuya - Bog - Springer Verlag, Singapore - Plusbog.dk

Dynamical Characteristics of Inertia-Gravity Waves in the Antarctic Mesosphere - Ryosuke Shibuya - Bog - Springer Verlag, Singapore - Plusbog.dk

This book examines the origins and dynamical characteristics of atmospheric inertia-gravity waves in the Antarctic mesosphere. Gravity waves are relatively small-scale atmospheric waves with a restoring force of buoyancy that can transport momentum upward from the troposphere to the middle atmosphere. In previous studies, the dynamical characteristics of mesospheric gravity waves have not been fully examined using numerical simulations, since performing a numerical simulation with a high resolution and a high model-top requires considerable computational power. However, recent advances in computational capabilities have allowed us to perform numerical simulations using atmospheric general circulation models, which cover the troposphere to the mesosphere with a sufficiently fine horizontal resolution to resolve small-scale gravity waves. The book first describes the simulation of mesospheric gravity waves using a high-resolution non-hydrostatic atmospheric model with a high model top. The accuracy of the numerical results was confirmed by the first Mesosphere-Stratosphere-Troposphere/Incoherent Scattering (MST/IS) radar observation in the Antarctic. It also depicts the origins and propagation processes of mesospheric gravity waves on the basis of the results of the high-resolution numerical model. The behaviors of mesospheric gravity waves can be clearly explained using both fundamental and cutting-edge theories of fluid dynamics

DKK 434.00
1

The Motion of Bubbles and Drops in Reduced Gravity - R.shankar Subramanian - Bog - Cambridge University Press - Plusbog.dk

The Motion of Bubbles and Drops in Reduced Gravity - R.shankar Subramanian - Bog - Cambridge University Press - Plusbog.dk

Orbiting spacecraft provide a valuable laboratory for experiments on physical and biological systems in a reduced gravity environment. In these studies, fluid masses containing bubbles and drops are encountered routinely. This 2001 book provides a clear, thorough review of the motion of bubbles and drops in reduced gravity. The emphasis is on theoretical analysis from first principles.

DKK 637.00
1

Analysis of the Gravity Field - Fernando Sanso - Bog - Springer Nature Switzerland AG - Plusbog.dk

Analysis of the Gravity Field - Fernando Sanso - Bog - Springer Nature Switzerland AG - Plusbog.dk

This textbook presents a comprehensive treatment of the theory and implementation of inverse methods in the analysis and interpretation of Earth''s gravity field. By restricting their consideration to a local rather than global level, the authors focus on the use of observations and data that are more sensitive to local mass anomalies. All necessary theoretical aspects are reformulated in terms of a Euclidean framework so that less complex tools from mathematical analysis can be utilized. Divided into three parts, the text begins with a review of basic mathematical properties of gravitation, computing gravity from mass distributions, and relevant methods from Fourier analysis. In the second part of the text, the Earth''s gravity field and its properties are introduced, and the preprocessing and processing of gravity data are explored. Finally, elementary inverse theory is discussed, after which the general inversion problem is considered via application of both the Tikhonov deterministic approach and a stochastic MCMC model. Throughout, examples and exercises are provided to both clarify material and to illustrate real-word applications for readers. Analysis of the Gravity Field: Direct and Inverse Problems is carefully written to be accessible to both mathematicians and geophysicists without sacrificing mathematical rigor. Readers should have a familiarity with the basics of mathematical analysis, as well as some knowledge of statistics and probability theory. Detailed proofs of more advanced results are relegated to appendices so that readers can concentrate on solution algorithms.

DKK 604.00
1

Lectures On Non-perturbative Canonical Gravity - Abhay Ashtekar - Bog - World Scientific Publishing Co Pte Ltd - Plusbog.dk

Lectures On Non-perturbative Canonical Gravity - Abhay Ashtekar - Bog - World Scientific Publishing Co Pte Ltd - Plusbog.dk

“… provides an excellent, up-to-date account of his reformulation of general relativity and of the new approaches to canonical quantum gravity that it has suggested. The book is well organized and well written…. is very successful in achieving its goal of giving a clear, up-to-date introduction to the approach to canonical quantum gravity pioneered by Ashtekar. It is essential reading not only for anyone who intends to do research on this approach but also for anyone at the level of an advanced graduate student or beyond who is interested in broadening his or her perspectives on the theory of quantum gravity.” Science, 1992 “Ashtekhar's book may continue to serve as a good pedagogical introduction to the subject.” General Relativity and Gravitation, 1997 Notes prepared in Collaboration with Ranjeet S Tate It is now generally recognized that perturbative field theoretical methods that have been highly successful in the quantum description of non-gravitational interactions cannot be used as a means of constructing a quantum theory of gravity. The primary aim of the book is to present an up- to-date account of a non-perturbative, canonical quantization program for gravity. Many of the technical results obtained in the process are of interest also to differential geometry, classical general relativity and QCD. The program as a whole was highlighted in virtually every major conference in gravitational physics over the past three years.

DKK 539.00
1

Gravity and Magnetic Exploration - Afif H. Saad - Bog - Cambridge University Press - Plusbog.dk

Gravity and Magnetic Exploration - Afif H. Saad - Bog - Cambridge University Press - Plusbog.dk

This volume provides a comprehensive account of key topics and techniques in gravity and magnetic exploration, supplemented by practical online resources. An ideal text for advanced courses and a valuable resource for research academics, professional geophysicists and all those interested in petroleum, engineering, mineral, environmental, geological and archeological lithosphere exploration.

DKK 684.00
1

Acquisition and Analysis of Terrestrial Gravity Data - Leland Timothy Long - Bog - Cambridge University Press - Plusbog.dk

Acquisition and Analysis of Terrestrial Gravity Data - Leland Timothy Long - Bog - Cambridge University Press - Plusbog.dk

Gravity surveys have a huge range of applications, indicating density variations in the subsurface and identifying man-made structures, local changes of rock type or even deep-seated structures at the crust/mantle boundary. This important one-stop book combines an introductory manual of practical procedures with a full explanation of analysis techniques, enabling students, geophysicists, geologists and engineers to understand the methodology, applications and limitations of a gravity survey. Filled with examples from a wide variety of acquisition problems, the book instructs students in avoiding common mistakes and misconceptions. It explores the increasing near-surface geophysical applications being opened up by improvements in instrumentation and provides more advance-level material as a useful introduction to potential theory. This is a key text for graduate students of geophysics and for professionals using gravity surveys, from civil engineers and archaeologists to oil and mineral prospectors and geophysicists seeking to learn more about the Earth''s deep interior.

DKK 542.00
1

Newton's Gravity - Douglas W. Macdougal - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Newton's Gravity - Douglas W. Macdougal - Bog - Springer-Verlag New York Inc. - Plusbog.dk

"Newton''s Gravity" conveys the power of simple mathematics to tell the fundamental truth about nature. Many people, for example, know the tides are caused by the pull of the Moon and to a lesser extent the Sun. But very few can explain exactly how and why that happens. Fewer still can calculate the actual pulls of the Moon and Sun on the oceans. This book shows in clear detail how to do this with simple tools. It uniquely crosses disciplines - history, astronomy, physics and mathematics - and takes pains to explain things frequently passed over or taken for granted in other books. Using a problem-based approach, "Newton''s Gravity" explores the surprisingly basic mathematics behind gravity, the most fundamental force that governs the movements of satellites, planets, and the stars. Author Douglas W. MacDougal uses actual problems from the history of astronomy, as well as original examples, to deepen understanding of how discoveries were made and what they mean. "Newton''s Gravity" concentrates strongly on the development of the science of orbital motion, beginning with Galileo, Kepler, and Newton, each of whom is prominently represented. Quotes and problems from Galileo''s Dialogs Concerning Two New Sciences and particularly Newton''s Principia help the reader get inside the mind of those thinkers and see the problems as they saw them, and experience their concise and typically eloquent writing. This book enables students and curious minds to explore the mysteries of celestial motion without having to know advanced mathematics. It will whet the reader''s curiosity to explore further and provide him or her the tools (mathematical or physical) to do so.

DKK 604.00
1

Authoritarian Gravity Centers - - Bog - Taylor & Francis Ltd - Plusbog.dk

Authoritarian Gravity Centers - - Bog - Taylor & Francis Ltd - Plusbog.dk

Autocracies not only resist the global spread of democracy but are sources of autocratic influence and pressure. This book presents a conceptual model to understand, assess, and explain the promotion and diffusion of authoritarian elements. Employing a cross-regional approach, leading experts empirically test the concept of authoritarian gravity centers (AGCs), defined as "regimes that constitute a force of attraction and contagion for countries in geopolitical proximity." With an analysis extending across Latin America, the Middle East, Eastern Europe, Central Asia, and Asia, these AGCs are shown to be effective as active promoters (push) or as neutral sources of attraction (pull). The authors contend that the influence of exogenous factors, along with international and regional contexts for the transformation of regime types, is vital to understanding and analyzing the transmission of autocratic institutional settings, ideas, norms, procedures, and practices, thus explaining the regional clustering of autocracies. It is the regional context in which external actors can influence authoritarian processes most effectively. Authoritarian Gravity Centers is a vibrant and comprehensive contribution to the growing field of autocratization, which will be of great interest to undergraduate and postgraduate students of comparative area studies, illiberalism, international politics, and studies of democracy.

DKK 439.00
1