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12 articles for “General Relativity”
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Research ArticleOpen accessIn the keywordsFinite Bounded Expanding Carmelian White Hole Universe Without Dark MatterJohn Gideon HartnettThe solution of Einstein’s field equations in Cosmological General Relativity (CGR), where the Galaxy is at or cosmologically near the center of a finite yet bounded spherically symmetrical isotropic gravitational field, is identical with the unbounded solution. I show that this leads to the conclusion that the Universe may be viewed as a finite expanding white hole. The fact that … …Physics International, Vol. 3, Issue 2 · 7 May 2013 · 6,935 accessesView PDFCite
Review ArticleOpen accessIn the keywordsOn the Generation of Equivalent 'Black Hole' Metrics: A ReviewStephen J. CrothersVarious line-elements purporting different types of black hole universes have been advanced by cosmologists but a means by which the required infinite set of equivalent metrics can be generated has evaded them. Without such a means the theory of black holes is not only incomplete but also ill-posed. Notwithstanding, the mathematical form by which the infinite set of equivalent metrics … …Space Science International, Vol. 3, Issue 2 · 6 Jul 2015 · 13,560 accessesView PDFCite
Research ArticleOpen accessIn the keywordsQUANTUM APPROACH TO THE GRAVITATIONAL WAVESSebastiano TostoThe study proposes a quantum approach to explain existence and main features of the gravitational waves radiated by an isolated two body orbiting system. The quantum eigenvalues of such a system are calculated with the help of the space-time quantum uncertainty, without additional hypotheses via an “ab initio” model. The approach is deliberately non-relativistic: The model does not implement any … …Physics International, Vol. 4, Issue 2 · 6 Jan 2014 · 7,017 accessesView PDFCite
Research ArticleOpen accessIn the keywordsExact Solution of a Test Particle in Presence of Thick Domain WallsA. Al-BadawiWe have obtained the exact solution of the equations of motion of a test particle near a thick domain walls for the case of Ricci tensor Rab = 0. From the solution it has been shown that the domain walls have repulsive gravitational fields. …American Journal of Applied Sciences, Vol. 3, Issue 7 · 31 Jul 2006 · 6,235 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Method for Transmitting Spacecrafts in Space with Velocity of at Least 0.01 of the Light Speed Using Materials with Very High Kinetic Energy in High Electric FieldsMario Nady AiadMany space new missions are on calendar this decade for Moon, Mars and other planets. Some of these missions are depending on simple reliable chemical thrusters and others on the nonchemical advanced propulsion techniques. In most of nonchemical techniques a nuclear source of energy is necessary as in nuclear electric rockets where the maximum velocity produced is around 20 km/s. … …American Journal of Engineering and Applied Sciences, Vol. 16, Issue 4 · 22 Dec 2023 · 5,365 accessesView PDFCite
Research ArticleOpen accessIn the abstractBOOM: Rainbow’s Gravity as the Source of Light RefractionMohsen LutephyAli, A. F., Faizal, M., & Majumder, B. (2015). Absence of an effective Horizon for black holes in Gravity’s Rainbow. Europhysics Letters, 109(2), 20001. https://doi.org/10.1209/0295-5075/109/20001 Ali, A. F., & Khalil, M. M. (2015). A proposal for testing gravity’s rainbow. Europhysics Letters, 110(2), 20009. https://doi.org/10.1209/0295-5075/110/20009 Amelino-Camelia, G., Ellis, J., Mavromatos, N. E., & Nanopoulos, D. V. (1997). Distance Measurement and Wave … …Physics International, Vol. 12, Issue 1 · 23 Dec 2021 · 8,252 accessesView PDFCite
Research ArticleOpen accessIn the abstractKRETSCHMANN INVARIANT AND RELATIONS BETWEEN SPACETIME SINGULARITIES ENTROPY AND INFORMATIONIoannis Gkigkitzis, Ioannis Haranas, Omiros RagosCurvature invariants are scalar quantities constructed from tensors that represent curvature. One of the most basic polynomial curvature invariants in general relativity is the Kretschmann scalar. This study is an investigation of this curvature invariant and the connection of geometry to entropy and information of different metrics and black holes. The scalar gives the curvature of the spacetime as a … …Physics International, Vol. 5, Issue 1 · 28 Mar 2014 · 11,910 accessesView PDFCite
Research ArticleOpen accessIn the abstractREVIEW OF GRAVITATIONAL WAVE DETECTIONS: DYNAMICAL SPACEReginald Thomas CahillThis is a review of the numerous successful gravitational wave detections and the implications for the nature of space and time. The prevailing space time paradigm in physics was founded on the putative "null" results of the Michelson-Morley (MM) 1887 interferometer experiment to detect light speed anisotropy and which resulted in two different new relativity theories: Lorentz relativity (Lorentz, 1904) … …Physics International, Vol. 5, Issue 1 · 27 Mar 2014 · 8,007 accessesView PDFCite
Research ArticleOpen accessIn the abstractTransformity: The Dependence of the Laws of Physics on Higher-Dimensional Coordinate TransformationsPaul S. WessonIn unified field theories with more than four dimensions, the form of the equations of physics in spacetime depends in general on the choice of coordinates in higher dimensions. The reason is that the group of coordinate transformations in (say) five dimensions is broader than in spacetime. This kind of gauge dependence is illustrated by two examples: a cosmological model … …Space Science International, Vol. 1, Issue 2 · 10 Dec 2013 · 9,625 accessesView PDFCite
Research ArticleOpen accessIn the abstractTHE THEORY OF METARELATIVITY: BEYOND ALBERT EINSTEIN’S RELATIVITYAbdo Abou JaoudeThe theory of metarelativity is a system of equations written to take into consideration additional effects in the universe and about the matter inside it. The study begins with Albert Einstein’s theory of special relativity and it develops a system of equations which lead us to further explanations and to a new physics paradigm. Like special relativity which was created … …Physics International, Vol. 4, Issue 2 · 4 Sep 2013 · 7,741 accessesView PDFCite