Results for 'gravitational theories'

996 found
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  1.  52
    Modern Tests of Relativistic Gravitational Theories.Nicolae Sfetcu - manuscript
    Dicke and Schiff established a framework for testing general relativity, including through null experiments and using the physics of space exploration, electronics and condensed matter, such as the Pound-Rebka experiment and laser interferometry. The gravitational lens tests and the temporal delay of light are highlighted by parameter γ of the PPN formalism, equal to 1 for general relativity and with different values in other theories. The BepiColombo mission aims to test the general theory of relativity by measuring the (...)
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  2.  39
    Evaluation of Post-Einsteinian Gravitational Theories Through Parameterized Post-Newtonian Formalism.Nicolae Sfetcu - manuscript
    Right after the elaboration and success of general relativity (GR), alternative theories for gravity began to appear. In order to verify and classify all these theories, specific tests have been developed, based on self-consistency and on completeness. In the field of experimental gravity, one of the important applications is formalism. For the evaluation of gravity models, several sets of tests have been proposed. Parameterized post-Newtonian formalism considers approximations of Einstein's gravity equations by the lowest order deviations from Newton's (...)
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  3.  48
    Tests and Anomalies of Post-Newtonian Gravitational Theories.Nicolae Sfetcu - manuscript
    Usually, the "laboratory" of gravitational tests was the celestial bodies, the astrophysical systems. But such tests are disturbed by non-gravitational effects. The most used such "laboratory" was the solar system. Recently, scientists have focused on observing binary pulsars for the verification of gravitational theories, by observing the variations of the orbital period, thus providing indirect evidence for the emission of gravitational radiation. But the experimenter cannot "arrange the lab" according to his needs, nor trigger certain (...)
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  4. Théorie des cordes, gravité quantique à boucles et éternalisme.Baptiste Le Bihan - 2021 - In Alexandre Declos & Claudine Tiercelin (eds.), La métaphysique du temps : perspectives contemporaines. Paris: Collège de France.
    L'éternalisme, la thèse selon laquelle les entités que nous catégorisons comme étant passées, présentes et futures existent tout autant, est la meilleure approche ontologique de l'existence temporelle qui soit en accord avec les théories de la relativité restreinte et de la relativité générale. Cependant, les théories de la relativité restreinte et générale ne sont pas fondamentales si bien que plusieurs programmes de recherche tentent de trouver une théorie plus fondamentale de la gravité quantique rassemblant tous les enseignements de la physique (...)
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  5. Mie's Theories of Matter and Gravitation.Chris Smeenk - 2007 - In Jürgen Renn (ed.), The Genesis of General Relativity. Boston: Springer. pp. 1543-1553.
    Unifying physics by describing a variety of interactions – or even all interactions – within a common framework has long been an alluring goal for physicists. One of the most ambitious attempts at unification was made in the 1910s by Gustav Mie. Mie aimed to derive electromagnetism, gravitation, and aspects of the emerging quantum theory from a single variational principle and a well-chosen Lagrangian. Mie’s main innovation was to consider nonlinear field equations to allow for stable particle-like solutions (now called (...)
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  6.  50
    Classic Gravitational Tests of Post-Einsteinian Theories.Nicolae Sfetcu - manuscript
    Albert Einstein proposed three tests of general relativity, later named the classic tests of general relativity, in 1916: the precession of the perihelion of Mercury's orbit, sun light deflection, and the gravitational redshift of the light. For gravitational testing, the indirect effects of gravity are always used, usually particles that are influenced by gravity. In the presence of gravity, the particles move along curved geodesic lines. The sources of gravity that cause the curvature of spacetime are material bodies, (...)
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  7.  84
    The Relativistic Theory of Gravitation Beyond General Relativity.Guillen Gomez Alfonso Leon - manuscript
    It presents the basics of the “Relativistic theory of gravitation”, with the inclusion of original texts, from various papers, published between 1987 and 2009, by theirs authors: S. S Gershtein, A. A. Logunov, Yu. M. Loskutov and M. A. Mestvirishvili, additionally, together with the introductions, summaries and conclusions of the author of this paper. The “Relativistic theory of gravitation” is a gauge theory, compatible with the theories of quantum physics of the electromagnetic, weak and strong forces, which defines gravity (...)
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  8.  47
    The Relativistic Theory of Gravitation Beyond General Relativity.Alfonso Guillen Gomez - manuscript
    It presents the basics of the “Relativistic theory of gravitation”, with the inclusion of original texts, from various papers, published between 1987 and 2009, by theirs authors: S. S Gershtein, A. A. Logunov, Yu. M. Loskutov and M. A. Mestvirishvili, additionally, together with the introductions, summaries and conclusions of the author of this paper. The “Relativistic theory of gravitation” is a gauge theory, compatible with the theories of quantum physics of the electromagnetic, weak and strong forces, which defines gravity (...)
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  9.  31
    Tests et anomalies des théories de la gravité post-newtoniennes.Nicolae Sfetcu - manuscript
    Dans la première édition du Principia, Newton considérait que des expériences avec le pendule lui permettraient de déchiffrer les différents types de force de résistance et leur variation avec la vitesse. Habituellement, le « laboratoire » des tests gravitationnels était les corps célestes, les systèmes astrophysiques. Mais ces tests sont perturbés par des effets non gravitationnels. Le « laboratoire » le plus utilisé était le système solaire. Récemment, les scientifiques se sont concentrés sur l'observation des pulsars binaires pour la vérification (...)
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  10. Electromagnetic and Gravitational Pictures of the World.Sergey G. Fedosin - 2007 - Apeiron 14 (4):385-413.
    The review of the theory of electromagnetic field together with the special and general theories of relativity has been made. The similar theory of gravitation has been presented which has the property of Lorentz-invariancy in its own representation in which the information is transferred at the speed of propagation of the gravitational field. Generalization of the specified gravitation theory on noninertial reference systems has been made with the help of the mathematical apparatus of the general relativity. It allows (...)
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  11. Newton's Law of Universal Gravitation and Hume's Conception of Causality.Matias Slavov - 2013 - Philosophia Naturalis 50 (2):277-305.
    This article investigates the relationship between Hume’s causal philosophy and Newton ’s philosophy of nature. I claim that Newton ’s experimentalist methodology in gravity research is an important background for understanding Hume’s conception of causality: Hume sees the relation of cause and effect as not being founded on a priori reasoning, similar to the way that Newton criticized non - empirical hypotheses about the properties of gravity. However, according to Hume’s criteria of causal inference, the law of universal gravitation is (...)
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  12.  46
    Gravité et tests gravitationnels.Nicolae Sfetcu - manuscript
    Les théories scientifiques en général, en physique en particulier, sont confirmées (temporairement) par des expériences vérifiant les affirmations et les prédictions des théories, jetant ainsi les bases de la connaissance scientifique. Francis Bacon a été le premier à soutenir le concept d'une expérience cruciale, qui peut décider la validité d'une hypothèse ou d'une théorie. Plus tard, Newton a soutenu que les théories scientifiques sont directement induites par les résultats expérimentaux et les observations, excluant les hypothèses non vérifiées. DOI: 10.13140/RG.2.2.34744.70403 .
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  13.  34
    Unification de la gravité avec les autres forces fondamentales.Sfetcu Nicolae - manuscript
    Plusieurs théories unificatrices ont été proposées. Une grande unification implique l'existence d'une force électronucléaire. La dernière étape de l'unification nécessiterait une théorie qui inclue à la fois la mécanique quantique et la gravité par la relativité générale (« la théorie finale »). Après 1990, certains physiciens considèrent que la théorie M à 11 dimensions, souvent identifiée à l'une des cinq théories des supercordes perturbateurs, ou parfois à la supergravité à supersymétrie maximale supersymétrique à 11 dimensions, est la théorie finale. L'idée (...)
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  14. About The Nature of Gravitational Constant and Rational Metric Systems.Andrew Wutke - manuscript
    This is a scanned draft of my very early work, not completed due to the loss of the original electronic version. The gravitational constant G has been a subject of interest for more than two centuries. Precise measurements indicate that it is equal to 6.673(10)xl0-11 m^3/kgs^2, with relative standard uncertainty of 1.5x10-3. The need for such constant is discussed. Various systems of units of measure have emerged since Newton, and none of them is both practical, and useful in theoretical (...)
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  15.  63
    Épistémologie de la gravité quantique.Sfetcu Nicolae - manuscript
    La gravité quantique a nécessité la prise en compte des questions épistémologiques fondamentales, qui peuvent être identifiées en philosophie avec le problème corps-esprit et le problème du libre arbitre . Ces questions ont influencé l'épistémologie de la mécanique quantique sous la forme du « parallélisme psycho-physique » de von Neumann et l'analyse ultérieure de la thèse de Wigner selon laquelle « l'effondrement du paquet d'ondes » se produit dans l'esprit de « l'observateur ». La gravité quantique en cosmologie pose le (...)
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  16. L'espace et le temps existent-ils ? Le mystère de la gravité quantique.Baptiste Le Bihan - 2018 - Implications Philosophiques 1.
    La physique contemporaine pourrait bien nous livrer un enseignement incroyable, à savoir que l'espace et le temps n'existent pas fondamentalement. Je présenterai succinctement les ontologies suggérées par les deux principaux programmes de recherche en gravité quantique : la théorie des cordes et la gravité quantique à boucles. Je soutiendrai ensuite qu'il est fructueux de prendre les différentes conceptions ontologiques de la conscience en philosophie de l'esprit en modèles pour la construction de solutions au problème de l'émergence de l'espace-temps.
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  17.  65
    Einstein and Gravitational Waves.Alfonso Leon Guillen Gomez - manuscript
    The author presents the history of gravitational waves according to Einstein, linking it to his biography and his time in order to understand it in his connection with the history of the Semites, the personality of Einstein in the handling of his conflict-generating circumstances in his relationships competition with his colleagues and in the formulation of the so-called general theory of relativity. We will fall back on the vicissitudes that Einstein experienced in the transition from his scientific work to (...)
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  18. Dirac-Type Equations in a Gravitational Field, with Vector Wave Function.Mayeul Arminjon - 2008 - Foundations of Physics 38 (11):1020-1045.
    An analysis of the classical-quantum correspondence shows that it needs to identify a preferred class of coordinate systems, which defines a torsionless connection. One such class is that of the locally-geodesic systems, corresponding to the Levi-Civita connection. Another class, thus another connection, emerges if a preferred reference frame is available. From the classical Hamiltonian that rules geodesic motion, the correspondence yields two distinct Klein-Gordon equations and two distinct Dirac-type equations in a general metric, depending on the connection used. Each of (...)
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  19.  34
    Tests de la gravité quantique.Sfetcu Nicolae - manuscript
    Le test primordial de toute théorie quantique de la gravité est la reproduction des succès de la relativité générale. Cela implique de reconstruire la géométrie locale à partir des observables non locaux. De plus, la gravité quantique devrait probablement prédire la topologie à grande échelle de l'Univers, qui pourrait bientôt être mesurable , et les phénomènes à l'échelle de Planck. Il existe déjà une prédiction liée à la gravité quantique: l'existence et le spectre du rayonnement Hawking du trou noir, une (...)
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  20.  27
    L'heuristique de la gravité quantique.Sfetcu Nicolae - manuscript
    Il existe trois problèmes majeurs dans la conception d'une théorie de la gravité quantique: la théorie quantique et la relativité générale présentent en elles-mêmes des problèmes conceptuels importants, les bases fondamentales disparates des deux théories génèrent de nouveaux problèmes majeurs en essayant de les combiner, et le contraste entre l'absence d'une théorie de la gravité quantique satisfaisante et des théories des ingrédients réussis soulèvent des questions sur la nature et la fonction de la discussion philosophique de la gravité quantique. DOI: (...)
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  21.  35
    L'heuristique de la gravité newtonienne.Nicolae Sfetcu - manuscript
    L'exemple classique d'un programme de recherche réussi est la théorie gravitationnelle de Newton, probablement le programme de recherche lakatosien le plus réussi. Initialement, la théorie gravitationnelle de Newton était confrontée à de nombreuses « anomalies » (« contre-exemples ») et contredisait les théories observationnelles qui soutenaient ces anomalies. Mais les partisans du programme de recherche sur la gravité newtonienne ont transformé chaque anomalie en cas corroborants. De plus, ils ont eux-mêmes indiqué des contre-exemples qu'ils ont ensuite expliqués à travers la (...)
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  22. Epistémologie de la gravité expérimentale - Rationalité scientifique.Nicolae Sfetcu - 2020 - Drobeta Turnu Severin: MultiMedia Publishing.
    L'évolution des tests gravitationnels dans une perspective épistémologique encadré dans le concept de reconstruction rationnelle d'Imre Lakatos, fondée sur sa méthodologie de programmes de recherche. Contrairement à d'autres travaux sur le même sujet, la période évaluée est très longue, allant de la philosophie naturelle de Newton aux théories de la gravité quantique d'aujourd'hui. Afin d'expliquer de manière plus rationnelle l'évolution complexe du concept de gravité du siècle dernier, je propose une extension naturelle de la méthodologie des programmes de recherche que (...)
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  23.  55
    Gravity and Gravitational Tests.Nicolae Sfetcu - manuscript
    Theories in science in general, and in physics in particular, are confirmed (temporarily) by experiments that verify the assertions and predictions of theories, thus laying the groundwork for scientific knowledge. Francis Bacon was the first to support the concept of a crucial experiment, which can decide the validity of a hypothesis or theory. Later, Newton argued that scientific theories are directly induced by experimental results and observations, excluding untested hypotheses. DOI: 10.13140/RG.2.2.33549.08167.
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  24. Einstein's Gravitation is Einstein-Grossmann's Equations.Alfonso Leon Guillen Gomez - 2015 - Journal of Advances in Physics 11 (3):3099-3110.
    While the philosophers of science discuss the General Relativity, the mathematical physicists do not question it. Therefore, there is a conflict. From the theoretical point view “the question of precisely what Einstein discovered remains unanswered, for we have no consensus over the exact nature of the theory 's foundations. Is this the theory that extends the relativity of motion from inertial motion to accelerated motion, as Einstein contended? Or is it just a theory that treats gravitation geometrically in the spacetime (...)
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  25.  63
    Incommensurability Tenet and Modern Theory of Gravity.Rinat M. Nugayev - 1989 - In Lev Bazhenov Azaria Polikarov (ed.), Cosmos,Physics,Philosophy. Russian Academy of Science. pp. 37-39.
    An apparent incommensurability of two leading gravitational paradigms (metric and nonmetric) is considered. It is conjectured that the application of neutral language of A.P. Lightman, D.L. Lee and Kip S. Thorne (“The Foundation of Theory of Gravitational Theories”. Phys. Rev. D 1973, vol.7, pp.3563-3572) can help to solve the theory –choice problem in principle. Key words: neutral language, theory choice, gravity.
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  26. Mathematical Nature of Reality, Plus Gravitation-Electromagnetism Unification, Derived From Revised Gravitational Tidal Forces and Mass-From-Gravity Concept.Rodney Bartlett - manuscript
    This article had its beginning with Einstein's 1919 paper "Do gravitational fields play an essential role in the structure of elementary particles?" Together with General Relativity's statement that gravity is not a pull but is a push caused by the curvature of space-time, a hypothesis for Earth's ocean tides was developed that does not solely depend on the Sun and Moon as Kepler and Newton believed. It also borrows from Galileo. The breakup of planets and asteroids by white dwarfs, (...)
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  27. Isaac Newton Vs. Robert Hooke on the Law of Universal Gravitation.Nicolae Sfetcu - manuscript
    One of the most disputed controversy over the priority of scientific discoveries is that of the law of universal gravitation, between Isaac Newton and Robert Hooke. Hooke accused Newton of plagiarism, of taking over his ideas expressed in previous works. In this paper I try to show, on the basis of previous analysis, that both scientists were wrong: Robert Hooke because his theory was basically only ideas that would never have materialized without Isaac Newton's mathematical support; and the latter was (...)
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  28. Isaac Newton vs Robert Hooke sur la loi de la gravitation universelle.Nicolae Sfetcu - manuscript
    L'une des controverses les disputées sur la priorité des découvertes scientifiques est celle de la loi de la gravitation universelle, entre Isaac Newton et Robert Hooke. Hooke a accusé Newton de plagiat, de reprendre ses idées exprimées dans des travaux antérieurs. J'essaie de montrer, sur la base d'une analyse précédente, que tous les deux scientifiques avaient tort: Robert Hooke parce que sa théorie n'était fondamentalement que des idées qui ne se seraient jamais matérialisées sans l'appui mathématique d'Isaac Newton; et ce (...)
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  29.  75
    La revendication de Hooke sur la loi de la gravité.Nicolae Sfetcu - manuscript
    Dans une note intitulée « Un état vrai de l'affaire et la controverse entre Sr Isaak Newton et le Dr Robert Hooke comme priorité de cette noble hypothèse du mouvement des planètes autour du Soleil en tant que leurs centres » non publié au cours de sa vie, Hooke a décrit sa théorie de la gravité. Pour soutenir sa « priorité », Hooke cite ses conférences sur les mouvements planétaires du 23 mai 1666, « Une tentative de prouver le mouvement (...)
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  30.  66
    Colombeau Solutions to Einstein Field Equations.Gravitational Singularities.Jaykov Foukzon - manuscript
    In contemporary mathematics, a Colombeau algebra of Colombeau generalized functions is an algebra of a certain kind containing the space of Schwartz distributions. While in classical distribution theory a general multiplication of distributions is not possible, Colombeau algebras provide a rigorous framework for this. Remark 1.1.1.Such a multiplication of distributions has been a long time mistakenly believed to be impossible because of Schwartz’ impossibility result, which basically states that there cannot be a differential algebra containing the space of distributions and (...)
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  31.  85
    Origin and Resolution of Theory-Choice Situations in Modern Theory of Gravity.Rinat M. Nugayev - 1987 - Methodology and Science 20 (4):177-197.
    A methodological model of origin and settlement of theory-choice situations (previously tried on the theories of Einstein and Lorentz in electrodynamics) is applied to modern Theory of Gravity. The process of origin and growth of empirically-equivalent relativistic theories of gravitation is theoretically reproduced. It is argued that all of them are proposed within the two rival research programmes – (1) metric (A. Einstein et al.) and (2) nonmetric (H. Poincare et al.). Each programme aims at elimination of the (...)
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  32.  50
    Selective Realism and the Framework/Interaction Distinction: A Taxonomy of Fundamental Physical Theories.Federico Benitez - 2019 - Foundations of Physics 49 (7):700-716.
    Following the proposal of a new kind of selective structural realism that uses as a basis the distinction between framework and interaction theories, this work discusses relevant applications in fundamental physics. An ontology for the different entities and properties of well-known theories is thus consistently built. The case of classical field theories—including general relativity as a classical theory of gravitation—is examined in detail, as well as the implications of the classification scheme for issues of realism in quantum (...)
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  33. Gravity as Archimedes? Thrust and a Bifurcation in That Theory.Mayeul Arminjon - 2004 - Foundations of Physics 34 (11):1703-1724.
    Euler’s interpretation of Newton’s gravity (NG) as Archimedes’ thrust in a fluid ether is presented in some detail. Then a semi-heuristic mechanism for gravity, close to Euler’s, is recalled and compared with the latter. None of these two ‘‘gravitational ethers’’ can obey classical mechanics. This is logical since the ether defines the very reference frame, in which mechanics is defined. This concept is used to build a scalar theory of gravity: NG corresponds to an incompressible ether, a compressible ether (...)
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  34.  70
    Classical Theory of Singularities.Nicolae Sfetcu - manuscript
    The singularities from the general relativity resulting by solving Einstein's equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their ontology? Is the general theory of relativity a theory that has shown its limits in this case?
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  35. A Methodological Note on Proving Agreement Between the Elementary Process Theory and Modern Interaction Theories.Cabbolet Marcoen - manuscript
    The Elementary Process Theory (EPT) is a collection of seven elementary process-physical principles that describe the individual processes by which interactions have to take place for repulsive gravity to exist. One of the two main problems of the EPT is that there is no proof that the four fundamental interactions (gravitational, electromagnetic, strong, and weak) as we know them can take place in the elementary processes described by the EPT. This paper sets forth the method by which it can (...)
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  36.  28
    Heuristique de la théorie des cordes.Sfetcu Nicolae - manuscript
    Comme la théorie des cordes n'a jusqu'à présent pas pu expliquer les phénomènes, il peut sembler que cela confirme l'opinion de Feyerabend selon laquelle il n'y a pas de « méthode » de la science. Et pourtant, la théorie des cordes est toujours le programme de recherche le plus actif pour la gravité quantique. Mais, par rapport à d'autres théories non falsifiables, cela a quelque chose de plus, en particulier : le langage mathématique, avec une logique claire de décoctions. Jusqu'à (...)
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  37. Why the de Broglie-Bohm Theory is Probably Wrong.Shan Gao - manuscript
    We investigate the validity of the field explanation of the wave function by analyzing the mass and charge density distributions of a quantum system. It is argued that a charged quantum system has effective mass and charge density distributing in space, proportional to the square of the absolute value of its wave function. This is also a consequence of protective measurement. If the wave function is a physical field, then the mass and charge density will be distributed in space simultaneously (...)
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  38.  47
    Prolifération des théories post-einsteiniennes - Formalisme paramétrisé post-newtonien (PPN).Nicolae Sfetcu - manuscript
    Immédiatement après l'élaboration et le succès de la relativité générale, des théories alternatives pour la gravité ont commencé à apparaître. En développant ces théories, de nombreuses stratégies différentes (heuristiques positives) ont été essayées, en ajoutant de nouvelles hypothèses à la RG, en utilisant un espace-temps pour lequel l'univers est statique, des hypothèses qui éliminent les singularités gravitationnelles, etc. Pour l'évaluation des modèles de gravité, plusieurs séries de tests ont été proposées. Le formalisme paramétrisé post-newtonien (PPN) détaille les paramètres qui différencient (...)
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  39.  46
    Prolifération des théories post-newtoniennes.Nicolae Sfetcu - manuscript
    Les théoriciens ont formulé un ensemble de critères fondamentaux que toute théorie de la gravité devrait satisfaire, deux purement théoriques et deux fondés sur des preuves expérimentales. Ainsi, une théorie doit être : complet (capable d'analyser à partir des « premiers principes » le résultat de toute expérience d'intérêt), auto-cohérent (sa prédiction pour le résultat de chaque expérience doit être unique), relativiste (à la limite où la gravité est négligée par rapport à d'autres interactions physiques, les lois non gravitationnelles de (...)
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  40.  59
    A Review of Nugayev's Book "Reconstruction of Scientific Theory Change". [REVIEW]Yuri V. Balashov - 1993 - Erkenntnis 38 (3):429-432.
    The author’s studies in the philosophy of science, culminating in this book, were inspired by his previous research in the domains of classical and quantum gravity. In fact it was the need to bring some order in the family of modern classical theories of gravitation and to build up the appropriate conceptual foundations of quantum gravity , that forced the author to create his own methodological model of theory change, which he applies rather successfully to the most controversial case (...)
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  41. Dark Matters in Contemporary Astrophysics: A Case Study in Theory Choice and Evidential Reasoning.William L. Vanderburgh - 2001 - Dissertation, The University of Western Ontario (Canada)
    This dissertation examines the dynamical dark matter problem in twentieth century astrophysics from the point of view of History and Philosophy of Science. The dynamical dark matter problem describes the situation astronomers find themselves in with regard to the dynamics of large scale astrophysical systems such as galaxies and galaxy clusters: The observed motions are incompatible with the visible distribution matter given the accepted law of gravitation. This discrepancy has two classes of possible solutions: either there exists copious amounts of (...)
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  42. Philosophical Problems of Space-Time Theories.Gustavo E. Romero - 2012 - In Gravitation and Cosmology.
    I present a discussion of some open issues in the philosophy of space-time theories. Emphasis is put on the ontological nature of space and time, the relation between determinism and predictability, the origin of irreversible processes in an expanding Universe, and the compatibility of relativity and quantum mechanics. In particular, I argue for a Parmenidean view of time and change, I make clear the difference between ontological determinism and predictability, propose that the origin of the asymmetry observed in physical (...)
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  43. Introduction dans les théories de la relativité.Nicolae Sfetcu - manuscript
    Selon la relativité générale, la force gravitationnelle est une manifestation de la géométrie de l'espace-temps local. RG est une théorie métrique de la gravité. Il est basé sur les équations d'Einstein, qui décrivent la relation entre la géométrie d'une variété pseudo-riemannienne à quatre dimensions, représentant l'espace-temps et l'énergie-impulsion contenu dans cet espace-temps. La gravité correspond aux modifications des propriétés spatiales et temporelles, qui à leur tour modifient les chemins des objets. La courbure est causée par l'énergie-impulsion de la matière. Selon (...)
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  44.  49
    Testing the Relativistic Theories of Gravity.Nicolae Sfetcu - manuscript
    In developing general relativity, Einstein was led by theoretical criteria of elegance and simplicity. His theory initially encountered "three classic tests": perihelion precession of Mercury's orbit, deflection of light by the Sun, and gravitational redshift of light. There are large differences in predictions between general relativity and classical physics, such as gravitational time dilation, gravitational lensing, gravitational redshift of light, and so on. And there are many relativistic theories of gravity, bifurcated or independent, but Einstein's (...)
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  45. Space-Time Intervals Underlie Human Conscious Experience, Gravity, and a Theory of Everything.Richard Sieb - 2018 - Neuroquantology 16 (7):49-64.
    Space-time intervals are the fundamental components of conscious experience, gravity, and a Theory of Everything. Space-time intervals are relationships that arise naturally between events. They have a general covariance (independence of coordinate systems, scale invariance), a physical constancy, that encompasses all frames of reference. There are three basic types of space-time intervals (light-like, time-like, space-like) which interact to create space-time and its properties. Human conscious experience is a four-dimensional space-time continuum created through the processing of space-time intervals by the brain; (...)
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  46.  52
    Is Mass at Rest One and the Same? A Philosophical Comment: On the Quantum Information Theory of Mass in General Relativity and the Standard Model.Vasil Penchev - 2014 - Journal of SibFU. Humanities and Social Sciences 7 (4):704-720.
    The way, in which quantum information can unify quantum mechanics (and therefore the standard model) and general relativity, is investigated. Quantum information is defined as the generalization of the concept of information as to the choice among infinite sets of alternatives. Relevantly, the axiom of choice is necessary in general. The unit of quantum information, a qubit is interpreted as a relevant elementary choice among an infinite set of alternatives generalizing that of a bit. The invariance to the axiom of (...)
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  47.  50
    Tests de la relativité générale et des théories post-einsteiniennes.Nicolae Sfetcu - manuscript
    Au milieu des années 1970, de nombreuses théories alternatives de la gravité ont été confirmées par des expériences au niveau du système solaire, mais pas au niveau cosmologique. En 1974, Joseph Taylor et Russell Hulse ont découvert le pulsar binaire , dont les impulsions extrêmement stables ont été surveillées par radiotélescope, permettant une mesure précise des paramètres astrophysiques. En 1978, le taux de changement de la période orbitale du système a été mesuré, ce qui a été confirmé par la relativité (...)
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  48.  48
    Proliferation of Post-Newtonian, Non-Relativistic Theories.Nicolae Sfetcu - manuscript
    Theoreticians have formulated a set of fundamental criteria that any theory of gravity should satisfy, two purely theoretical and two that are based on experimental evidence. Thus, a theory must be complete (capable of analyzing from the "first principles" the result of any experiment of interest), self-consistent (its prediction for the outcome of each experiment must be unique), relativistic (at the limit when gravity is neglected compared to other physical interactions, non-gravitational laws of physics must be reduced to special (...)
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  49. Are the Concepts of Mass in Quantum Theory and in General Relativity the Same?Armin Nikkhah Shirazi - manuscript
    The predominant approaches to understanding how quantum theory and General Relativity are related to each other implicitly assume that both theories use the same concept of mass. Given that despite great efforts such approaches have not yet produced a consistent falsifiable quantum theory of gravity, this paper entertains the possibility that the concepts of mass in the two theories are in fact distinct. It points out that if the concept of mass in quantum mechanics is defined such that (...)
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  50.  59
    Geons - candidates for the role of the initial microblack holes and their importance for the Planck physics.Alexander Klimets - 2000 - FIZIKA B (Zagreb) 9 (1):23-42.
    The article describes exotic objects, the geons, which emerge as the result of gravitational attraction among massless energy quanta. It is shown that the formation of geons occurs at the energy Epl = 10^19 GeV and leads to the rise of microscopic black holes of a Planck dimension, Planck mass and two horizon events. It is shown that the formation of Planck geons is energetically more likely in 3-dimensional space than with ``physics" of geons in a space of a (...)
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