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Author: Bernard H. Lavenda Publisher: World Scientific ISBN: 9814340480 Category : Science Languages : en Pages : 695
Book Description
Starting off from noneuclidean geometries, apart from the method of Einstein's equations, this book derives and describes the phenomena of gravitation and diffraction. A historical account is presented, exposing the missing link in Einstein's construction of the theory of general relativity: the uniformly rotating disc, together with his failure to realize, that the Beltrami metric of hyperbolic geometry with constant curvature describes exactly the uniform acceleration observed. This book also explores these questions: * How does time bend? * Why should gravity propagate at the speed of light? * How does the expansion function of the universe relate to the absolute constant of the noneuclidean geometries? * Why was the Sagnac effect ignored? * Can Maxwell's equations accommodate mass? * Is there an inertia due solely to polarization? * Can objects expand in elliptic geometry like they contract in hyperbolic geometry?
Author: Bernard H. Lavenda Publisher: World Scientific ISBN: 9814340480 Category : Science Languages : en Pages : 695
Book Description
Starting off from noneuclidean geometries, apart from the method of Einstein's equations, this book derives and describes the phenomena of gravitation and diffraction. A historical account is presented, exposing the missing link in Einstein's construction of the theory of general relativity: the uniformly rotating disc, together with his failure to realize, that the Beltrami metric of hyperbolic geometry with constant curvature describes exactly the uniform acceleration observed. This book also explores these questions: * How does time bend? * Why should gravity propagate at the speed of light? * How does the expansion function of the universe relate to the absolute constant of the noneuclidean geometries? * Why was the Sagnac effect ignored? * Can Maxwell's equations accommodate mass? * Is there an inertia due solely to polarization? * Can objects expand in elliptic geometry like they contract in hyperbolic geometry?
Book Description
4e de couv. indique : " "A l'aube du vingtième siècle, un jeune homme de vingt-six ans révolutionne la Physique malgré l'opposition de tous les vieux savants. " Depuis cent ans cette belle légende fait rêver bien des étudiants ravis de voir pour une fois un jeune l'emporter sur les vieux... Mais ce n'est qu'une image d'Epinal bien éloignée de la réalité. Il est vrai que la réalité est proprement incroyable. Il est aujourd'hui de plus en plus souvent reconnu que Henri Poincaré et Hendrik Antoon Lorentz sont les véritables fondateurs de la théorie de la Relativité et que l'article fondateur " d'Albert Einstein, en 1905, est une compilation de leurs travaux. Mais on s'est longtemps demandé comment tout cela avait été possible. Il est probable que, dans une période normale, un tel secret partagé par tant de gens n'aurait pas tenu bien longtemps. Mais la " Belle Epoque " n'est pas une période normale, c'est une époque de nationalisme déchaîné dont il nous est difficile de nous faire une idée. Pour les scientifiques allemands de l'Université de Gtittingen il n'était pas pensable de laisser à un Néerlandais, et surtout à un Français, le bénéfice d'une découverte fondamentale sur laquelle ils travaillaient depuis des années ! Il fallait absolument que cette découverte revienne à l'Allemagne. Einstein n'est pas le vrai coupable, il n'est qu'un rouage dans une machination dont le principal responsable est le mathématicien David Hilbert qui jalousait Poincaré au-delà de toute raison et qui a réussi à entraîner dans cette occultation délibérée le physicien Max Planck et son journal scientifique les Annalen der Physik. Les savants français ont eu leur part de responsabilité. Peu d'entre eux ont lu et compris les travaux de Poincaré, aucun ne l'a défendu. Bien entendu ce bouleversement de l'histoire de la Science est très solidement étayé comme il se doit. Tous les documents nécessaires ont été soigneusement recherchés et traduits, et l'on va de surprise en surprise... " L'authentique historiographie brise sans ménagement les images d'Epinal ; elle remplace les stéréotypes et les préjugés par des faits réels, extraits patiemment des archives " (Emmanuel Leroy-Ladurie). Jules Leveugle a gardé de ses études scientifiques un intérêt constant pour l'histoire des sciences car " on ne comprend bien que ce dont on connaît l'histoire "... et la méthode scientifique ne consiste t-elle pas à remettre en question même ce qui paraît bien établi ?"
Book Description
Il est aujourd'hui de plus en plus souvent reconnu que Henri Poincaré et Hendrik Antoon Lorentz sont les véritables fondateurs de la théorie de la Relativité et que "l'article fondateur" d'Albert Einstein, en 1905, est une compilation de leurs travaux. Un tel secret a été possible parce que la "Belle Epoque" n'est pas une période normale, c'est une époque de nationalisme déchaîné et pour les scientifiques allemands de l'Université de Göttigen il fallait absolument que cette découverte revienne à l'Allemagne.
Author: Thibault Damour Publisher: CRC Press ISBN: 1439870098 Category : Mathematics Languages : en Pages : 201
Book Description
It is well known that Einstein founded twentieth-century physics with his work on relativity and quanta, but what do we really know about these ground breaking ideas? How were they discovered? What should we retain today from the conceptual upheavals he initiated? Through a selection of concrete scenes taken from Einstein's life, the author offers
Author: Fouad Sabry Publisher: One Billion Knowledgeable ISBN: Category : Technology & Engineering Languages : en Pages : 281
Book Description
What Is Magnetorheological Fluid A magnetorheological fluid is a type of smart fluid in a carrier fluid, usually a type of oil. When subjected to a magnetic field, the fluid greatly increases its apparent viscosity, to the point of becoming a viscoelastic solid. Importantly, the yield stress of the fluid when in its active ("on") state can be controlled very accurately by varying the magnetic field intensity. The upshot is that the fluid's ability to transmit force can be controlled with an electromagnet, which gives rise to its many possible control-based applications. Extensive discussions of the physics and applications of MR fluids can be found in a recent book. How You Will Benefit (I) Insights, and validations about the following topics: Chapter 1: Magnetorheological fluid Chapter 2: Smart fluid Chapter 3: Ferrofluid Chapter 4: Electrorheological fluid Chapter 5: Rheology Chapter 6: Rheometry Chapter 7: Brownian motion (II) Answering the public top questions about magnetorheological fluid. (III) Real world examples for the usage of magnetorheological fluid in many fields. (IV) 17 appendices to explain, briefly, 266 emerging technologies in each industry to have 360-degree full understanding of magnetorheological fluid' technologies. Who This Book Is For Professionals, undergraduate and graduate students, enthusiasts, hobbyists, and those who want to go beyond basic knowledge or information for any kind of magnetorheological fluid.
Author: Michael R. Matthews Publisher: Springer ISBN: 9400776543 Category : Education Languages : en Pages : 2487
Book Description
This inaugural handbook documents the distinctive research field that utilizes history and philosophy in investigation of theoretical, curricular and pedagogical issues in the teaching of science and mathematics. It is contributed to by 130 researchers from 30 countries; it provides a logically structured, fully referenced guide to the ways in which science and mathematics education is, informed by the history and philosophy of these disciplines, as well as by the philosophy of education more generally. The first handbook to cover the field, it lays down a much-needed marker of progress to date and provides a platform for informed and coherent future analysis and research of the subject. The publication comes at a time of heightened worldwide concern over the standard of science and mathematics education, attended by fierce debate over how best to reform curricula and enliven student engagement in the subjects. There is a growing recognition among educators and policy makers that the learning of science must dovetail with learning about science; this handbook is uniquely positioned as a locus for the discussion. The handbook features sections on pedagogical, theoretical, national, and biographical research, setting the literature of each tradition in its historical context. It reminds readers at a crucial juncture that there has been a long and rich tradition of historical and philosophical engagements with science and mathematics teaching, and that lessons can be learnt from these engagements for the resolution of current theoretical, curricular and pedagogical questions that face teachers and administrators. Science educators will be grateful for this unique, encyclopaedic handbook, Gerald Holton, Physics Department, Harvard University This handbook gathers the fruits of over thirty years’ research by a growing international and cosmopolitan community Fabio Bevilacqua, Physics Department, University of Pavia
Author: David D. Nolte Publisher: Oxford University Press ISBN: 0192528505 Category : Science Languages : en Pages : 384
Book Description
Galileo Unbound traces the journey that brought us from Galileo's law of free fall to today's geneticists measuring evolutionary drift, entangled quantum particles moving among many worlds, and our lives as trajectories traversing a health space with thousands of dimensions. Remarkably, common themes persist that predict the evolution of species as readily as the orbits of planets or the collapse of stars into black holes. This book tells the history of spaces of expanding dimension and increasing abstraction and how they continue today to give new insight into the physics of complex systems. Galileo published the first modern law of motion, the Law of Fall, that was ideal and simple, laying the foundation upon which Newton built the first theory of dynamics. Early in the twentieth century, geometry became the cause of motion rather than the result when Einstein envisioned the fabric of space-time warped by mass and energy, forcing light rays to bend past the Sun. Possibly more radical was Feynman's dilemma of quantum particles taking all paths at once — setting the stage for the modern fields of quantum field theory and quantum computing. Yet as concepts of motion have evolved, one thing has remained constant, the need to track ever more complex changes and to capture their essence, to find patterns in the chaos as we try to predict and control our world.
Author: Bernard H. Lavenda
Author: Bernard H. Lavenda
Author: Jean-Marc Ginoux
Author: Jules Leveugle
Author: Jules Leveugle
Author: Thibault Damour
Author: 
Author: Fouad Sabry
Author: Michael R. Matthews
Author: Jean-Paul Auffray
Author: David D. Nolte