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Author: Helge Kragh
Publisher: Birkhäuser
ISBN: 3319243799
Category : Mathematics
Languages : en
Pages : 197
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Book Description
The main focus of this book is on the interconnection of two unorthodox scientific ideas, the varying-gravity hypothesis and the expanding-earth hypothesis. As such, it provides a fascinating insight into a nearly forgotten chapter in both the history of cosmology and the history of the earth sciences. The hypothesis that the force of gravity decreases over cosmic time was first proposed by Paul Dirac in 1937. In this book the author examines in detail the historical development of Dirac’s hypothesis and its consequences for the structure and history of the earth, the most important of which was that the earth must have been smaller in the past.
Author: Helge Kragh
Publisher: Birkhäuser
ISBN: 3319243799
Category : Mathematics
Languages : en
Pages : 197
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Book Description
The main focus of this book is on the interconnection of two unorthodox scientific ideas, the varying-gravity hypothesis and the expanding-earth hypothesis. As such, it provides a fascinating insight into a nearly forgotten chapter in both the history of cosmology and the history of the earth sciences. The hypothesis that the force of gravity decreases over cosmic time was first proposed by Paul Dirac in 1937. In this book the author examines in detail the historical development of Dirac’s hypothesis and its consequences for the structure and history of the earth, the most important of which was that the earth must have been smaller in the past.
Author: Wolfgang Jacoby
Publisher: Springer Science & Business Media
ISBN: 3540853294
Category : Science
Languages : en
Pages : 413
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Book Description
Gravity interpretation involves inversion of data into models, but it is more. Gravity interpretation is used in a “holistic” sense going beyond “inversion”. Inversion is like optimization within certain a priori assumptions, i.e., all anticipated models lie in a limited domain of the a priori errors. No source should exist outside the anticipated model volume, but that is never literally true. Interpretation goes beyond by taking “outside” possibilities into account in the widest sense. Any neglected possibility carries the danger of seriously affecting the interpretation. Gravity interpretation pertains to wider questions such as the shape of the Earth, the nature of the continental and oceanic crust, isostasy, forces and stresses, geol- ical structure, nding useful resources, climate change, etc. Interpretation is often used synonymously with modelling and inversion of observations toward models. Interpretation places the inversion results into the wider geological or economic context and into the framework of science and humanity. Models play a central role in science. They are images of phenomena of the physical world, for example, scale images or metaphors, enabling the human mind to describe observations and re- tionships by abstract mathematical means. Models served orientation and survival in a complex, partly invisible physical and social environment.
Author: Henglei Zhang
Publisher: Frontiers Media SA
ISBN: 2832543553
Category : Science
Languages : en
Pages : 151
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Book Description
Knowledge of the density of the subsurface of a planet is crucial in determining its interior structure, and one can estimate the average bulk crustal density directly using the admittance between topography and gravity, which has been successfully used for the Moon and is being extended to Mars. The interpretation of gravity data is commonly done by computation of a gravity anomaly (GA) by correcting the raw data for a number of factors that impact the gravity field. Depending on the target science, different types of GA can be computed, the interpretation of which have been widely employed in geophysics to explore the interior of the Earth and other planets, through applications in airborne gravity, near-surface geophysics, regional geophysics, and planetary geophysics. Yet how to extract a great variety of information from GAs for applications in geophysics entails further investigation. Over the decades, remarkable progress has been made to extract information from GAs identified from data. For instance, a series of 3D inversion algorithms facilitates the extraction of the subsurface density distribution. With the improved processing based on dense gravity observations that yield high precision and high resolution GAs, more detailed geological information can be unveiled. When using the admittance between topography and gravity to estimate the crustal density, it is essential to identify what kinds of GAs to be used, such as Bouguer gravity or free-air gravity. Also, what appropriate approaches to scrutinize the applications of GAs in various case studies (e.g., calculating the geoid and estimating the elastic thickness) need to be decoded.
Author: Terrance Boult
Publisher: Springer Nature
ISBN: 3031330544
Category : Computers
Languages : en
Pages : 119
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Book Description
This book presents the first unified formalization for defining novelty across the span of machine learning, symbolic-reasoning, and control and planning-based systems. Dealing with novelty, things not previously seen by a system, is a critical issue for building vision-systems and general intelligent systems. The book presents examples of using this framework to define and evaluate in multiple domains including image recognition image-based open world learning, hand-writing and author analysis, CartPole Control, Image Captioning, and Monopoly. Chapters are written by well-known contributors to this new and emerging field. In addition, examples are provided from multiple areas, such as machine-learning based control problems, symbolic reasoning, and multi-player games.
Author: Barbara Brownie
Publisher: Bloomsbury Publishing
ISBN: 1350000345
Category : Design
Languages : en
Pages : 247
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Book Description
Today, we are living in the New Space Age, where mass commercial space travel is almost within our grasp. This otherworldly possibility has opened up new cultural images of space, both real and fictional, and has caused fashion design and spacesuit engineering to intersect in new, exciting ways. Spacewear traverses this uncharted territory by exploring the changing imagination of space in fashion-and fashion in space-from the first Space Age to the 21st century. Exploring how space travel has stylistically and technologically framed fashion design on earth and how we need to revisit established design practices for the weightless environment, Spacewear connects the catwalk and the space station. This book draws together speculative fantasies in sci-fi films such as Star Trek and 2001: A Space Odyssey, with the engineered spacesuits Biosuit, and the NASA Z-2 and with catwalk interpretations by the likes of Alexander McQueen, Hussein Chalayan, André Courrèges, and Iris van Herpen. While the development of commercial space agencies has led to new concerns for style in garments for outer space that re-think fundamental design principles such as drape, high fashion has experimented with new possibilities for weightlessness that extend far beyond the 1960s vision of Space Age metallic fabrics and helmet-style headwear. Brownie takes the reader on a fascinating journey from fantasy to function and to form, deepening our understanding of this new category of fashion that is prompting new approaches to garment design and construction both on earth and in outer space.
Author: Sasmeeta Tripathy
Publisher: Springer Nature
ISBN: 9811994935
Category : Technology & Engineering
Languages : en
Pages : 604
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Book Description
This book presents select proceedings of the International Conference on Recent Advances in Mechanical Engineering Research and Development (ICRAMERD 2022) focusing on the recent advances and best practices of mechanical engineering, related technologies and sciences to meet the challenges in mechanical engineering, digital technology and smart manufacturing. The contents focus on design engineering, advanced materials, automation in engineering, industrial and systems engineering, energy and others. Some of the topics discussed here include fracture and failure analysis, fuels and alternative fuels, non-conventional machining, combustion and IC engines, advanced manufacturing technologies, powder metallurgy and rapid prototyping, industrial engineering and automation, supply chain management, design of mechanical systems, vibrations and control engineering, automobile engineering, performance analysis of biomass energy systems, heat transfer, composite materials, thermal modelling and simulations of different systems, analysis of slurry pipeline systems, waste management, optimization and robotics. The wide range of topics presented in this book will be useful for beginners, researchers as well as professionals in mechanical engineering.
Author: Rosaly M. C. Lopes
Publisher: Springer Nature
ISBN: 3031256700
Category : Science
Languages : en
Pages : 384
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Book Description
Written by expert researchers, this book covers all the major aspects of research in Jupiter's moon Io, from the interior to its space environment. Io is one of the Solar System’s most exotic satellites. The book discusses Io's interior, geology, atmosphere, and, in particular, its active volcanism, which was discovered from observations by the Voyager 1 spacecraft in 1979, confirming a possibility suggested from theoretical studies based on Io’s orbit. Our knowledge of Io’s volcanism, composition, and space environment was significantly increased as a result of observations by other spacecrafts, including Galileo. More than a decade after the 1st edition, “Io After Galileo”, this 2nd edition of the book now includes results obtained by the New Horizons mission and, more recently, Juno. It also presents observational results from ground-based telescopes using adaptive optics having provided resolutions that rival those of spacecraft. The book provides a review of the current status of Io research and gives an outlook to planned future observations. It thus serves as reference for researchers in the field and an introduction for PhD students and newcomers planning to study this exotic Solar System moon.
Author:
Publisher: Elsevier
ISBN: 0444538038
Category : Science
Languages : en
Pages : 5604
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Book Description
Treatise on Geophysics, Second Edition, is a comprehensive and in-depth study of the physics of the Earth beyond what any geophysics text has provided previously. Thoroughly revised and updated, it provides fundamental and state-of-the-art discussion of all aspects of geophysics. A highlight of the second edition is a new volume on Near Surface Geophysics that discusses the role of geophysics in the exploitation and conservation of natural resources and the assessment of degradation of natural systems by pollution. Additional features include new material in the Planets and Moon, Mantle Dynamics, Core Dynamics, Crustal and Lithosphere Dynamics, Evolution of the Earth, and Geodesy volumes. New material is also presented on the uses of Earth gravity measurements. This title is essential for professionals, researchers, professors, and advanced undergraduate and graduate students in the fields of Geophysics and Earth system science. Comprehensive and detailed coverage of all aspects of geophysics Fundamental and state-of-the-art discussions of all research topics Integration of topics into a coherent whole
Author: Robert Ehrlich
Publisher: Rutgers University Press
ISBN: 9780813525488
Category : Humor
Languages : en
Pages : 246
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Book Description
A whimsical construction of an imaginary dialogue between two people intent on understanding esoteric topics that range from human sexuality to physics. Ehrlich (physics, George Mason U.) is dedicated to making the sciences fun and interesting, and though the conceit is "cute," the information it contains is dynamic and scientifically sound, posing interesting questions and speculations on life in the universe, human behavior, perception, gravity, material properties, physics, time, space, and a sample list of "What ifs?" to pursue on one's own. The answer to the title's question (we were dying to know) is that, in part, it's all a matter of probabilities. The promotional material says the cartoons are humorous. Not. Annotation copyright by Book News, Inc., Portland, OR
Author: United States. National Aeronautics and Space Administration. Life Sciences Strategic Planning Study Committee
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 244
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Book Description
