Results 21 to 30 of about 18,930 (127)
Classical Bianchi Type I Cosmology in K‐Essence Theory
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 We use one of the simplest forms of the K‐essence theory and we apply it to the classical anisotropic Bianchi type I cosmological model, with a barotropic perfect fluid (p = γρ) modeling the usual matter content and with cosmological constant Λ. Classical exact solutions for any γ ≠ 1 and Λ = 0 are found in closed form, whereas solutions for Λ ≠ 0 are ...
J. Socorro +3 more
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Age of the universe and the energy density of radiation
ACI Avances en Ciencias e Ingenierías, 2015 From the mathematical expression relating the redshift parameter with time and the cosmological densities of matter, radiation and vacuum in the Lemaitre model, we have derived an equation for the age of the universe at present time taking into account ...
Antonina Calahorrano, Carlos A. Marín
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Mimicking General Relativity with Newtonian Dynamics
International Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012 The aim of this paper is twofolded. (1) Showing that Newtonian mechanics of point particles in static potentials admits an alternative description in terms of effective riemannian spacetimes. (2) Using the above geometrization scheme to investigate aspects of the gravitational field as it appears in the Einstein theory. It is shown that the mechanical (
E. Goulart +3 more
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Los procesos de las narrativas Asháninca en la frontera entre Brasil y Perú
Lengua y Sociedad, 2017 En este artículo se discuten las narrativas de los ashánincas brasileños y cómo en estas están representadas algunas experiencias. Los mitos se mezclan con los procesos que los ashánincas están desarrollando para la comprensión de los fenómenos en su ...
Érika Mesquita
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Sefarad : Revista de Estudios Hebraicos y Sefardíes, 2021 La música de las esferas es una de las concepciones importantes para entender varios escritos –tanto literarios como exegéticos– de fray Luis de León, como su Exposición del Libro de Job.
Weixin Bao
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Cosmologia neo-newtoniana: um passo intermediário em direção à relatividade geral
Revista Brasileira de Ensino de FísicaA cosmologia é um domínio da física no qual o emprego da teoria da relatividade geral é indispensável. No entanto, uma cosmologia baseada na teoria newtoniana da gravitação é possível em certas circunstâncias.
J.C. Fabris, H.E.S. Velten
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Espacio-tiempo Anti-de Sitter (AdS)
Revista de Investigación de Física, 2019 En este trabajo se hace una introducción básica acerca de los espacios- tiempo de Sitter y Anti-de Sitter. Para el espacio de Sitter se calcula dos métricas equivalentes una usando coordenadas estáticas y la otra usando coordenadas de Friedmann-Lemaître ...
Fulgencio Villegas
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Land‐based meanings of disaster adaptations from Woodland Cree First Nation, Canada
Canadian Geographer / Le géographe canadien, Volume 69, Issue 2, Summer / été 2025.Abstract This paper showcases how climate disaster presents unique challenges to many northern Indigenous communities in Canada. Disasters further exacerbate historical traumas related to colonialism, including forced displacement, land loss, and cultural disconnection.
Ranjan Datta +3 more
wiley +1 more source
Energía de Møller para las métricas de Schwarzschild, Reissner-Nordström y Kerr-Newman
Revista de Investigación de Física, 2017 Se evalúa la distribucion de energía de los agujeros negros de Schwarzschild, Reissner-Nordström y Kerr-Newman usando el complejo energía-momento de Møller.
Fulgencio Villegas Silva +1 more
doaj +1 more source