Marcelo Samuel Berman - Profile on Academia.edu (original) (raw)
Papers by Marcelo Samuel Berman
Journal of Modern Physics, October 2013-to be published
We …rst introduce entropy according to University Physics textbooks, then brie ‡y discuss it, and... more We …rst introduce entropy according to University Physics textbooks, then brie ‡y discuss it, and we then, prove,by a general relativistic derivation, that the Universe has entropy growth, like a white-hole, that it is R 2 -dependent, and that dark energy, represented by a cosmological "constant", is caused by heat ‡ow, and provides for entropy growth.Keywords-Cosmology, entropy, dark matter,heat ‡ow, Universe.
Journal of Modern Physics vol.4,7(2013)
We prove,by a general relativistic derivation, that the Universe is locally and globally, stable,... more We prove,by a general relativistic derivation, that the Universe is locally and globally, stable, resembling an extreme Kerr-white-hole -Universe.
Editora Albert Einstein, e-publication
Rotation of the Universe and Generalised Gaussian Metrics
Arxiv preprint arXiv:0801.1954, Jan 1, 2008
Abstract Rotation of the Universe can be dealt by generalised Gaussian metrics, defined in this p... more Abstract Rotation of the Universe can be dealt by generalised Gaussian metrics, defined in this paper. Robertson-Walker's metric has been employed with proper-time, in its standard applications; the generalised Gaussian metric imply in the use of a non-constant temporal ...
Arxiv preprint arXiv:0707.3290, Jan 1, 2007
We suggest that there are time-varying quanta of mass (gomidia) and of length (somia), thus point... more We suggest that there are time-varying quanta of mass (gomidia) and of length (somia), thus pointing to a quantization of geometry and gravitation. The present numerical value of the gomidium and somium , are, 10 −65 grams, and 10 −91 centimeters. Gomidia may be responsible for dark matter in the Universe; Heisenberg's principle, confirms the numerical estimates for gomidia and somia , either for the present Universe, or for Planck's time.
An alternative form for Raychaudhuri's equation
International Journal of Theoretical Physics, Jan 1, 1994
Raychaudhuri's equation contains some features that deserve attention, such as the i... more Raychaudhuri's equation contains some features that deserve attention, such as the increase witht 2 of the difference between half the density parameter and the deceleration parameter. We derive a form of the equation that shows how this happens.
International journal of theoretical physics, Jan 1, 1992
The Brans-Dicke (BD) theory admits de Sitter spacetime as a solution with 9
General relativity with variable speed of light and Pioneers anomaly
Astrophysics and Space Science, Jan 1, 2011
Abstract We consider a General Relativistic RW's metric, with variable speed of ligh... more Abstract We consider a General Relativistic RW's metric, with variable speed of light, and find a field of Universal acceleration, numerically coincident with the value of the Pioneers anomalous one. This deceleration may decrease with time, as we calculated. This is ...
Arxiv preprint arXiv:0809.4793, Jan 1, 2008
The extension of Dirac's LNH to cover cosmological and fine-structure time-varying "constants", a... more The extension of Dirac's LNH to cover cosmological and fine-structure time-varying "constants", and the rotation of the Universe, is here analysed, including a "derivation" of the angular speed of the present Universe, and of the inflationary phase. Criticizable points on the present calculation, are clarified.
Density perturbations in a Brans-Dicke cosmological model
International journal of theoretical physics, Jan 1, 1990
A very general flat solution for Brans-Dicke cosmology with a perfect-fluid, Robertson-Walker met... more A very general flat solution for Brans-Dicke cosmology with a perfect-fluid, Robertson-Walker metric and a perfect gas law of state is examined regarding density perturbations. The model has growing instabilities, but not of exponential character.
Amplification of gravitational waves in scalar-tensor accelerating lambda-Universes
Astrophysics and Space Science, Jan 1, 2010
Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J.... more Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J. Theor. Phys. 29, 14111414, 2009), we obtain solutions for the amplification of gravitational waves in the models. The solutions consider a perfect gas equation of state, ...
Inflationary Lambda-Universe with Time Varying Fundamental Constants
Arxiv preprint gr-qc/0207051, Jan 1, 2002
Amplification of Gravitational Waves in Scalar-Tensor Inflationary Lambda-Model
International Journal of Theoretical Physics, Jan 1, 2010
Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J.... more Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J. Theor. Phys. 29, 14111414, 2009), we obtain solutions for the amplification of gravitational waves in the models. The solutions consider a perfect gas equation of state, ...
Misconceptions on Relativity Gravitation and Cosmology
Arxiv preprint physics/0507110, Jan 1, 2005
Brief History of Black-Holes
Arxiv preprint gr-qc/0412054, Jan 1, 2004
On the Rotational and Machian Properties of the Universe
Arxiv preprint physics/0610003, Jan 1, 2006
Astrophysics and Space Science, Jan 1, 2008
We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a c... more We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a cosmological "constant" term, and spin from torsion, as in Einstein-Cartan's theory when a scalarfield of Brans-Dicke type acts in the model. We find a "no-hair" result, for shear and vorticity; we also make contact with the alternative Machian picture of the Universe.
On the Magnetic Field, and Entropy Increase, in a Machian Universe
Arxiv preprint physics/0611007, Jan 1, 2006
International journal of theoretical physics, Jan 1, 1992
We discuss various possible scenarios where l'~ ~ 2q, where f~ stands for the density parameter a... more We discuss various possible scenarios where l'~ ~ 2q, where f~ stands for the density parameter and q for the deceleration parameter. We further estimate the corrections necessary when a variable cosmological constant is considered in the theory.
The two pioneers anomalies and universal rotation
Astrophysics and Space Science, Jan 1, 2011
The first Pioneers Anomaly is the deceleration of about −9 × 10−8 cm·s −2 suffered by NASA space-... more The first Pioneers Anomaly is the deceleration of about −9 × 10−8 cm·s −2 suffered by NASA space-probes trav-eling towards outer space (Anderson et al. 2002). It has no acceptable explanation within local Physics, but if we resort to Cosmology, it could be explained by the rotation of ...
Journal of Modern Physics, October 2013-to be published
We …rst introduce entropy according to University Physics textbooks, then brie ‡y discuss it, and... more We …rst introduce entropy according to University Physics textbooks, then brie ‡y discuss it, and we then, prove,by a general relativistic derivation, that the Universe has entropy growth, like a white-hole, that it is R 2 -dependent, and that dark energy, represented by a cosmological "constant", is caused by heat ‡ow, and provides for entropy growth.Keywords-Cosmology, entropy, dark matter,heat ‡ow, Universe.
Journal of Modern Physics vol.4,7(2013)
We prove,by a general relativistic derivation, that the Universe is locally and globally, stable,... more We prove,by a general relativistic derivation, that the Universe is locally and globally, stable, resembling an extreme Kerr-white-hole -Universe.
Editora Albert Einstein, e-publication
Rotation of the Universe and Generalised Gaussian Metrics
Arxiv preprint arXiv:0801.1954, Jan 1, 2008
Abstract Rotation of the Universe can be dealt by generalised Gaussian metrics, defined in this p... more Abstract Rotation of the Universe can be dealt by generalised Gaussian metrics, defined in this paper. Robertson-Walker's metric has been employed with proper-time, in its standard applications; the generalised Gaussian metric imply in the use of a non-constant temporal ...
Arxiv preprint arXiv:0707.3290, Jan 1, 2007
We suggest that there are time-varying quanta of mass (gomidia) and of length (somia), thus point... more We suggest that there are time-varying quanta of mass (gomidia) and of length (somia), thus pointing to a quantization of geometry and gravitation. The present numerical value of the gomidium and somium , are, 10 −65 grams, and 10 −91 centimeters. Gomidia may be responsible for dark matter in the Universe; Heisenberg's principle, confirms the numerical estimates for gomidia and somia , either for the present Universe, or for Planck's time.
An alternative form for Raychaudhuri's equation
International Journal of Theoretical Physics, Jan 1, 1994
Raychaudhuri's equation contains some features that deserve attention, such as the i... more Raychaudhuri's equation contains some features that deserve attention, such as the increase witht 2 of the difference between half the density parameter and the deceleration parameter. We derive a form of the equation that shows how this happens.
International journal of theoretical physics, Jan 1, 1992
The Brans-Dicke (BD) theory admits de Sitter spacetime as a solution with 9
General relativity with variable speed of light and Pioneers anomaly
Astrophysics and Space Science, Jan 1, 2011
Abstract We consider a General Relativistic RW's metric, with variable speed of ligh... more Abstract We consider a General Relativistic RW's metric, with variable speed of light, and find a field of Universal acceleration, numerically coincident with the value of the Pioneers anomalous one. This deceleration may decrease with time, as we calculated. This is ...
Arxiv preprint arXiv:0809.4793, Jan 1, 2008
The extension of Dirac's LNH to cover cosmological and fine-structure time-varying "constants", a... more The extension of Dirac's LNH to cover cosmological and fine-structure time-varying "constants", and the rotation of the Universe, is here analysed, including a "derivation" of the angular speed of the present Universe, and of the inflationary phase. Criticizable points on the present calculation, are clarified.
Density perturbations in a Brans-Dicke cosmological model
International journal of theoretical physics, Jan 1, 1990
A very general flat solution for Brans-Dicke cosmology with a perfect-fluid, Robertson-Walker met... more A very general flat solution for Brans-Dicke cosmology with a perfect-fluid, Robertson-Walker metric and a perfect gas law of state is examined regarding density perturbations. The model has growing instabilities, but not of exponential character.
Amplification of gravitational waves in scalar-tensor accelerating lambda-Universes
Astrophysics and Space Science, Jan 1, 2010
Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J.... more Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J. Theor. Phys. 29, 14111414, 2009), we obtain solutions for the amplification of gravitational waves in the models. The solutions consider a perfect gas equation of state, ...
Inflationary Lambda-Universe with Time Varying Fundamental Constants
Arxiv preprint gr-qc/0207051, Jan 1, 2002
Amplification of Gravitational Waves in Scalar-Tensor Inflationary Lambda-Model
International Journal of Theoretical Physics, Jan 1, 2010
Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J.... more Abstract After reviewing the scalar-tensor inflationary solutions by Berman and Trevisan (Int. J. Theor. Phys. 29, 14111414, 2009), we obtain solutions for the amplification of gravitational waves in the models. The solutions consider a perfect gas equation of state, ...
Misconceptions on Relativity Gravitation and Cosmology
Arxiv preprint physics/0507110, Jan 1, 2005
Brief History of Black-Holes
Arxiv preprint gr-qc/0412054, Jan 1, 2004
On the Rotational and Machian Properties of the Universe
Arxiv preprint physics/0610003, Jan 1, 2006
Astrophysics and Space Science, Jan 1, 2008
We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a c... more We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a cosmological "constant" term, and spin from torsion, as in Einstein-Cartan's theory when a scalarfield of Brans-Dicke type acts in the model. We find a "no-hair" result, for shear and vorticity; we also make contact with the alternative Machian picture of the Universe.
On the Magnetic Field, and Entropy Increase, in a Machian Universe
Arxiv preprint physics/0611007, Jan 1, 2006
International journal of theoretical physics, Jan 1, 1992
We discuss various possible scenarios where l'~ ~ 2q, where f~ stands for the density parameter a... more We discuss various possible scenarios where l'~ ~ 2q, where f~ stands for the density parameter and q for the deceleration parameter. We further estimate the corrections necessary when a variable cosmological constant is considered in the theory.
The two pioneers anomalies and universal rotation
Astrophysics and Space Science, Jan 1, 2011
The first Pioneers Anomaly is the deceleration of about −9 × 10−8 cm·s −2 suffered by NASA space-... more The first Pioneers Anomaly is the deceleration of about −9 × 10−8 cm·s −2 suffered by NASA space-probes trav-eling towards outer space (Anderson et al. 2002). It has no acceptable explanation within local Physics, but if we resort to Cosmology, it could be explained by the rotation of ...