Gravitational Measurements, Fundamental Metrology and Constants PDF Download
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Author: V. de Sabbata
Publisher: Springer Science & Business Media
ISBN: 9400929552
Category : Science
Languages : en
Pages : 547
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Book Description
Proceedings of the NATO Advanced Study Institute, Erice, Italy, May 2-12, 1987
Author: V. de Sabbata
Publisher: Springer Science & Business Media
ISBN: 9400929552
Category : Science
Languages : en
Pages : 547
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Book Description
Proceedings of the NATO Advanced Study Institute, Erice, Italy, May 2-12, 1987
Author: John Barrow
Publisher: Vintage
ISBN: 0307555356
Category : Science
Languages : en
Pages : 370
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Book Description
Reality as we know it is bound by a set of constants—numbers and values that dictate the strengths of forces like gravity, the speed of light, and the masses of elementary particles. In The Constants of Nature, Cambridge Professor and bestselling author John D.Barrow takes us on an exploration of these governing principles. Drawing on physicists such as Einstein and Planck, Barrow illustrates with stunning clarity our dependence on the steadfastness of these principles. But he also suggests that the basic forces may have been radically different during the universe’s infancy, and suggests that they may continue a deeply hidden evolution. Perhaps most tantalizingly, Barrow theorizes about the realities that might one day be found in a universe with different parameters than our own.
Author: T.J. Quinn
Publisher: IOS Press
ISBN: 1614990026
Category : Science
Languages : en
Pages : 836
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Book Description
The exchange between physics and metrology is always fascinating and exciting. Many are the open problems in physics that call for extremely precise standards, many are the advances in metrology made possible by a deep and assiduous study of the underlying physics. One has just to think of the enormous sophistication required in the measurements of some absolute quantities such as the Avogadro, the gas, or the gravitational constants. It is also worth noticing that not only the units of a metrological system are interrelated through the fundamental constants, but also the latter find their full significance when they are determined through the most exacting metrological experiments. Over the past decade many improvements took place and these are discussed in this book; from one side the old caesium SI second definition has found a new realisation, with the “fountain” approach, replacing the classical thermal atomic beam. The use of “cold” atom techniques, in which bunches of inert atoms are collected, slowed down, and cooled, has opened a number of new and unexpected avenues for metrology and fundamental constants; one of these possibilities being the atom interferometry. Another important “quantum jump” was the demonstration of the possibility of performing a direct frequency division in the visible, using ultra short femtosecond pulses. In addition, the possibility of “counting” electrons or photons gave a fundamental support to the development of single-electron capacitance standards and to new scenarios in the absolute calibration of photo-detectors.
Author: Venzo De Sabbata
Publisher: World Scientific
ISBN: 9789810217662
Category : Science
Languages : en
Pages : 336
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Book Description
This book gives an exposition of both the old and new results of spin and torsion effects on gravitational interactions with implications for particle physics, cosmology etc. Physical aspects are stressed and measurable effects in relation to other areas of physics are discussed.Among the topics discussed are: alternative ways of unifying gravity with electroweak and strong interactions by an energy dependent spin torsion coupling constant; the idea that all interactions can be understood as originating from spin curvature coupling; the possibility of cosmological models with torsion providing a solution to the cosmological constant problem; and a demonstration that torsion can lead directly to the quantization of space-time itself.
Author: V. de Sabbata
Publisher: Springer Science & Business Media
ISBN: 9781402019555
Category : Science
Languages : en
Pages : 450
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Book Description
An up-to-date description of progress and current problems with the gravitational constant, both in terms of generalized gravitational theories and experiments either in the laboratory, using Casimir force measurements, or in space at solar system distances and in cosmological observations. Contributions cover different aspects of the state and prediction of unified theories of the physical interactions including gravitation as a cardinal link, the role of experimental gravitation and observational cosmology in discriminating between them, the problem of the precise measurement and stability of fundamental physical constants in space and time, and the gravitational constant in particular. Recent advances discussed include unified and scalar-tensor theories, theories in diverse dimensions and their observational windows, gravitational experiments in space, rotational and torsional effects in gravity, basic problems in cosmology, early universe as an arena for testing unified models, and big bang nucleosynthesis.
Author: Antonino Zichichi
Publisher: World Scientific
ISBN: 9813208309
Category : Science
Languages : en
Pages : 503
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Book Description
The main focus of this year's Proceedings of the 53rd Course of the International School of Subnuclear Physics is the future of physics, including the new frontiers in other fields.
Author: V A Matveev
Publisher: World Scientific
ISBN: 9814554790
Category :
Languages : en
Pages : 318
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Book Description
Contents:Theory: Electroweak Baryon Number Non-Conservation in Particle Physics and Cosmology (V A Rubakov)Constraints and Model Considerations for a 17 keV Neutrino (R D Peccei)Solar Neutrinos:Measurement of the Solar υe Flux with the Homestake 37Cl Detector (K Lande)SAGE: The Soviet-American Gallium Solar Neutrino Experiment (V N Gavrin)Calorimetric Measurements of an Artificial Netrino Source Activity for the Baksan Gallium-Germanium Neutrino Telescope (I N Belousov et al)The Status of Gallex (R Wink)The Sudbury Neutrino Observatory (D Sinclair)Results from Underground Experiments: Recent Results from IBM (J LoSecco & J Learned)Analysis of Rare Signals at the Baksan Underground Scintillation Telescope (E N Alexeev)Dark Matter:Axion Searches (P Sikivie)Gamma and Neutrino Astronomy/Astrophics: Five Year Anniversary of Supernova 1987A in the Large Magellanic Cloud (D K Nadyozhin)Neutrino Physics and Core Collapse Supernovae (W Hillebrandt)Cosmic Rays Origin in Active Galactic Nuclei (V I Dokuchaev)Future Experiments: Super-Kamiokande (Y Totsuka)The Lake Baikal Neutino Project (L B Bezrukov)Towards the Third Generation of Resonant Gravitational Wave Detectors (F Ricci) Readership: Particle physicists and astrophysicists. keywords:
Author: Venzo De Sabbata
Publisher: World Scientific
ISBN: 9814544922
Category :
Languages : en
Pages : 274
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Book Description
The introduction of spin is believed to be a necessary tool if one wishes to quantize general relativity. Then the main problem is to see if the introduction of spin generalizing the general relativity from a geometric point of view, i.e. through the concept of torsion, can be experimentally verified.The reader can find in this book both theoretical and experimental arguments which show the necessity for the introduction of spin, and then of torsion, in gravity. In fact, torsion constitutes the more natural and simple way to introduce spin in general relativity. For that reason it is of fundamental importance to see if there are some experiences that indicate — if not directly, then at least indirectly — the presence of torsion. This book presents a discussion on experiments with a polarized-mass torsion pendulum, the search for galactic dark matter interacting with a spin pendulum, a description of a space-based method for determination of the gravitational constant and space-based measurements of spin in gravity, as well as a discussion on theoretical arguments, for instance the nature of torsion and nonmetricity, the viability of gravitational theories with spin-torsion and spin-spin interaction, many-dimensional gravitational theories with torsion, spinors on curved spaces, the spinors in real space-time, etc.We know that until now there has been no evidence for torsion, but this fact cannot prevent us from considering in some detail this implement of research that seems to be important from both a geometrical and a physical point of view.
Author: Antonino Zichichi
Publisher: World Scientific
ISBN: 9813148691
Category : Science
Languages : en
Pages : 413
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Book Description
Proceedings of the International School of Subnuclear Physics, ISSP 2014, 52nd Course, ERICE, Erice, 24 June - 3 July 2014.
Author: Samir Mekid
Publisher: John Wiley & Sons
ISBN: 1119721717
Category : Technology & Engineering
Languages : en
Pages : 404
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Book Description
Metrology and Instrumentation: Practical Applications for Engineering and Manufacturing provides students and professionals with an accessible foundation in the metrology techniques, instruments, and governing standards used in mechanical engineering and manufacturing. The book opens with an overview of metrology units and scale, then moves on to explain topics such as sources of error, calibration systems, uncertainty, and dimensional, mechanical, and thermodynamic measurement systems. A chapter on tolerance stack-ups covers GD&T, ASME Y14.5-2018, and the ISO standard for general tolerances, while a chapter on digital measurements connects metrology to newer, Industry 4.0 applications.
