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The Physics Teacher, 1980
Red shift and space curature questions are discussed in a isotropic, homogeneous universe.
Robert P. Bauman, Thomas J. Wdowiak
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Red shift and space curature questions are discussed in a isotropic, homogeneous universe.
Robert P. Bauman, Thomas J. Wdowiak
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American Journal of Physics, 1993
Two of the most common terms employed in discussing cosmological models are open and closed. They are occasionally misused either by not recognizing or by not making it clear that each term may be used to characterize, independently and simultaneously, both the dynamic behavior and spatial geometric structure of the model under discussion. In addition,
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Two of the most common terms employed in discussing cosmological models are open and closed. They are occasionally misused either by not recognizing or by not making it clear that each term may be used to characterize, independently and simultaneously, both the dynamic behavior and spatial geometric structure of the model under discussion. In addition,
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2020
This chapter examines two spatially homogenous world pictures which captured most of the attention in cosmology from the late 1940s through the mid-1960s: an evolving universe and a universe in a statistically steady state. The evolving model describes expansion according to general relativity from an exceedingly dense early condition often termed the ...
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This chapter examines two spatially homogenous world pictures which captured most of the attention in cosmology from the late 1940s through the mid-1960s: an evolving universe and a universe in a statistically steady state. The evolving model describes expansion according to general relativity from an exceedingly dense early condition often termed the ...
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Some Relativistic Cosmological Models
General Relativity and Gravitation, 1998The author's dissertation from 1966 is published here for the first time in a journal. The now famous ``Kantowski-Sachs models'' in cosmology were deduced under the supervisorship of R. Sachs. The commutation relations and Killing equations then require the metric to have the following form \[ ds^2= dt^2- X(t)^2 dr^2- Y(t)^2 g_{AB} dx^A dx^B \qquad (A ...
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Nuclear Physics B - Proceedings Supplements, 1999
George F. R. Ellis, Henk Elst
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George F. R. Ellis, Henk Elst
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Viscous Cosmological Models and Cosmological Horizons
2009Thermodynamics plays an important role in cosmological models because the energy–momentum tensor appearing in the equations of general relativity must be specified according to the contents of the Universe. The earlier classical cosmological models do not include dissipation, as they postulate a reversible adiabatic expansion of the Universe.
David Jou +2 more
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Observational cosmology and cosmological models
Soviet Physics Uspekhi, 1987N.S. Kardashev +2 more
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1992
Abstract There are a number of ways of proceeding. The equation can be solved, in general, by using elliptic functions, or resort can be made to computer plots of numerically generated solutions. However, many of the sub-cases can be integrated directly using elementary functions or, failing that, elementary functions can be used to ...
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Abstract There are a number of ways of proceeding. The equation can be solved, in general, by using elliptic functions, or resort can be made to computer plots of numerically generated solutions. However, many of the sub-cases can be integrated directly using elementary functions or, failing that, elementary functions can be used to ...
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COSMOLOGICAL BAYESIAN MODEL SELECTION
Statistical Problems in Particle Physics, Astrophysics and Cosmology, 2006Bayesian model comparison can be used to decide whether the introduction of a new parameter is warranted by data. I focus on the Savage-Dickey density ratio as a method to compute the Bayes factor of nested models without carrying out a computationally demanding multi-dimensional integration.
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
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