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pro vyhledávání: '"Neves, J. C."'
Identifying the necessary conditions for the onset of rigidity in a gel remains a challenge. It has been suggested that local particle coordination could be used to establish such conditions, but rigid gels occur for various coordination numbers. Com
Externí odkaz:
http://arxiv.org/abs/2307.13315
Autor:
Neves, J. C. S.
Publikováno v:
Rev. Bras. Ensino Fis. 39 (3), e3303 (2017)
The recent observation of gravitational waves confirms one of the most interesting predictions in general relativity: the black holes. Because the gravitational waves detected by LIGO fit very well within general relativity as a phenomenon produced b
Externí odkaz:
http://arxiv.org/abs/1703.01524
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Autor:
Neves, J. C. S.
Publikováno v:
Gen. Relativ. Gravit. 49, 124 (2017)
In this article, we present a bouncing cosmology inspired by a family of regular black holes. This scale-dependent cosmology deviates from the cosmological principle by means of a scale factor which depends on the time and the radial coordinate as we
Externí odkaz:
http://arxiv.org/abs/1607.08610
Autor:
Neves, J. C. S.
Publikováno v:
Physics Essays 30 (3), 279 (2017)
In "On the Heavens" Aristotle criticizes the Pythagorean point of view which claims the existence of a cosmic music and a cosmic sound. According to the Pythagorean argument, there exists a cosmic music produced by stars and planets. These celestial
Externí odkaz:
http://arxiv.org/abs/1604.08869
Autor:
Neves, J. C. S.
Publikováno v:
Astrophys. Space Sci. 361, 281 (2016)
The ekpyrotic phase (a slow contraction cosmic phase before the current expansion phase) manages to solve the main problems of the standard cosmology by means of a scalar field interpreted as a cosmic fluid in the Friedmann equation. Moreover, this p
Externí odkaz:
http://arxiv.org/abs/1509.03304
Autor:
Neves, J. C. S.
Publikováno v:
Int. J. Mod. Phys. A 32, 1750112 (2017)
In this work we have deformed regular black holes which possess a general mass term described by a function which generalizes the Bardeen and Hayward mass functions. By using linear constraints in the energy-momentum tensor to generate metrics, the s
Externí odkaz:
http://arxiv.org/abs/1508.06701
Autor:
Neves, J. C. S.
Publikováno v:
Phys. Rev. D 92, 084015 (2015)
In this work, we show that regular black holes in a Randall-Sundrum-type brane world model are generated by the nonlocal bulk influence, expressed by a constant parameter in the brane metric, only in the spherical case. In the axial case (black holes
Externí odkaz:
http://arxiv.org/abs/1508.03615
Autor:
Neves, J. C. S.
Publikováno v:
Cad. Nietzsche 32, 283 (2013)
In this work we have carried out an approach between the nonsingular scientific cosmologies (without the initial singularity, the big bang), specially the cyclic models, and the Nietzsche's thought of the eternal recurrence. Moreover, we have pointed
Externí odkaz:
http://arxiv.org/abs/1506.05502
Autor:
Neves, J. C. S.
Publikováno v:
Cad. Nietzsche 36, 267 (2015)
In the Nietzschean philosophy, the concept of force from physics is important to build one of its main concepts: the will to power. The concept of force, which Nietzsche found out in the Classical Mechanics, almost disappears in the physics of the XX
Externí odkaz:
http://arxiv.org/abs/1506.05504