Zobrazeno 1 - 10 of 33 pro vyhledávání: '"Gabriel G Carvalho"'
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Akademický článek
Economic–Sanitation–Environmental (Dis)Connections in Brazil: A Trans-Scale Perspective From Minas Gerais State and BH Microregion
Autor: Norma Valencio, Arthur Valencio, Gabriel G. Carvalho, Murilo S. Baptista
Publikováno v: Urban Planning, Vol 9, Iss 0 (2024)
Brazil’s economic, environmental, and infrastructural landscape is characterised by local and regional inequalities, particularly evident in Minas Gerais state and the municipalities surrounding its capital, Belo Horizonte (BH) microregion. This re
Externí odkaz: https://doaj.org/article/c545aa7762ca49b79edf0a9debb0984a
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2
Akademický článek
On the hypotheses of Penrose’s singularity theorem under disformal transformations
Autor: Eduardo Bittencourt, Gabriel G. Carvalho, Iarley P. Lobo, Leandro Santana
Publikováno v: European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-10 (2020)
Abstract We analyze how the hypotheses of Penrose’s singularity theorem (1965) are modified by the action of disformal transformations (defined in terms of light-like vectors) upon a given space-time metric. In particular, we investigate the transf
Externí odkaz: https://doaj.org/article/5438cd1efd3740e29e32353f12ad1e26
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4
A Deep Learning Approach to Mobile Camera Image Signal Processing
Autor: Gabriel M. Da Costa, Gabriel G. Carvalho, Lucas Pontes De Albuquerque, Tsang Ing Ren, Diego J. C. Santiago, Jose Ivson S. Silva, Marcel Santana Santos, Jorge F. Puig Battle
Publikováno v: Anais Estendidos da Conference on Graphics, Patterns and Images (SIBRAPI Estendido 2020).
The quality of the images obtained from mobile cameras has been an important feature for modern smartphones. The camera Image Signal Processing (ISP) is a significant procedure when generating high-quality images. However, the existing algorithms in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e86e86a4656e4abdecd3bb69e524c907
https://doi.org/10.5753/sibgrapi.est.2020.13016
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5
On the hypotheses of Penrose’s singularity theorem under disformal transformations
Autor: Leandro Santana, Iarley P. Lobo, E. Bittencourt, Gabriel G. Carvalho
Publikováno v: European Physical Journal
European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-10 (2020)
We analyze how the hypotheses of Penrose's singularity theorem (1965) are modified by the action of disformal transformations (defined in terms of light-like vectors) upon a given space-time metric. In particular, we investigate the transformation of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef27efd5e7c53e3af0336eccb38b5637
http://repo.scoap3.org/api
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7
The geometry of null-like disformal transformations
Autor: Gabriel G. Carvalho, Iarley P. Lobo
Motivated by the hindrance of defining metric tensors compatible with the underlying spinor structure, other than the ones obtained via a conformal transformation, we study how some geometric objects are affected by the action of a disformal transfor
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1935645a7321cab43a92ebfcf51f3c81
http://arxiv.org/abs/1707.01784
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8
Scalar field self-force effects on a particle orbiting a Reissner-Nordström black hole
Autor: Donato Bini, Andrea Geralico, Gabriel G. Carvalho
Publikováno v: Physical review. D, Particles, fields, gravitation, and cosmology 94 (2016): 124028-1–124028-15. doi:10.1103/PhysRevD.94.124028
info:cnr-pdr/source/autori:Donato Bini, Gabriel G. Carvalho, and Andrea Geralico/titolo:Scalar field self-force effects on a particle orbiting a Reissner-Nordstrom black hole/doi:10.1103%2FPhysRevD.94.124028/rivista:Physical review. D, Particles, fields, gravitation, and cosmology/anno:2016/pagina_da:124028-1/pagina_a:124028-15/intervallo_pagine:124028-1–124028-15/volume:94
Scalar field self-force effects on a scalar charge orbiting a Reissner-Nordstr\"om black hole are investigated. The scalar wave equation is solved analytically in a post-Newtonian framework, and the solution is used to compute the self-field as well
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4da151dfc0b42679d0c797e6b323b4b
https://doi.org/10.1103/physrevd.94.124028
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9
Extended disformal approach in the scenario of rainbow gravity
Autor: Eduardo Bittencourt, Iarley P. Lobo, Gabriel G. Carvalho
Publikováno v: Physical Review D. 93
We investigate all feasible mathematical representations of disformal transformations on a space-time metric according to the action of a linear operator upon the manifold's tangent and cotangent bundles. The geometric, algebraic and group structures
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb3a19077ee47f259b68fba7e6159d5f
https://doi.org/10.1103/physrevd.93.044005
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10
On the disformal invariance of the Dirac equation
Autor: Eduardo Bittencourt, Gabriel G. Carvalho, Iarley P. Lobo
Publikováno v: Classical and Quantum Gravity. 32:185016
In this paper we analyze the invariance of the Dirac equation under disformal transformations depending on the propagating spinor field. Using the Weyl-Cartan formalism, we construct a large class of disformal maps between different metric tensors, r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6501f35248d9d7a11c9c791af08d0d1f
https://doi.org/10.1088/0264-9381/32/18/185016
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