Zobrazeno 1 - 10
of 1 814
pro vyhledávání: '"Álvarez, Enrique"'
Autor:
Álvarez, Enrique, Anero, Jesús
Generalized Kerr-Schild nilpotent deformations of an arbitrary background spacetime $\overline{g}_{\m\n}(x)$ are considered. Those are of the form $\overline{g}_{\m\n}+l_\m l_\n$ with $l^2=0$. The relationship between the Ricci tensor of the backgrou
Externí odkaz:
http://arxiv.org/abs/2405.03289
Autor:
Álvarez, Enrique, Anero, Jesús
Linear superposition of gravitational fields is shown to be possible for a large class of spacetimes, in some specific coordinates. Explicit examples are presented.
Comment: 11 pages, LaTeX, more details given
Comment: 11 pages, LaTeX, more details given
Externí odkaz:
http://arxiv.org/abs/2402.10249
Gravitational plane waves (when Ricci flat) belong to the VSI family. The achronym VSI stands for vanishing scalar invariants, meaning that all scalar invariants built out of Riemann tensor and its derivatives vanish, although the Riemann tensor itse
Externí odkaz:
http://arxiv.org/abs/2401.04434
Autor:
Troncoso-Pastoriza, Francisco, Eguía-Oller, Pablo, Díaz-Redondo, Rebeca P., Granada-Álvarez, Enrique
Publikováno v:
Sustainable cities and society, 2018, vol. 36, p. 59-70
In this paper we introduce a method that supports the detection, identification and localization of lamps in a building, with the main goal of automatically feeding its energy model by means of Building Information Modeling (BIM) methods. The propose
Externí odkaz:
http://arxiv.org/abs/2401.05390
Autor:
Troncoso-Pastoriza, Francisco, Eguía-Oller, Pablo, Díaz-Redondo, Rebeca P., Granada-Álvarez, Enrique, Erkoreka, Aitor
Publikováno v:
Sensors, 2019, vol. 19, no 7, p. 1516
Computer vision is used in this work to detect lighting elements in buildings with the goal of improving the accuracy of previous methods to provide a precise inventory of the location and state of lamps. Using the framework developed in our previous
Externí odkaz:
http://arxiv.org/abs/2312.11380
Autor:
Troncoso-Pastoriza, Francisco, Eguía-Oller, Pablo, Díaz-Redondo, Rebeca P., Granada-Álvarez, Enrique
Publikováno v:
Automation in Construction, 2019, vol. 106, p. 102852
This paper introduces a complete method for the automatic detection, identification and localization of lighting elements in buildings, leveraging the available building information modeling (BIM) data of a building and feeding the BIM model with the
Externí odkaz:
http://arxiv.org/abs/2312.11375
Autor:
Cabrera, Juan F. Hernández, De Miguel, Javier, Álvarez, Enrique Joven, Hernández-Suárez, E., Rubiiño-Martín, J. Alberto, Otani, Chiko
The axion is a long-postulated boson that can simultaneously solve two fundamental problems of modern physics: the charge-parity symmetry problem in the strong interaction and the enigma of dark matter. In this work we estimate, by means of Monte Car
Externí odkaz:
http://arxiv.org/abs/2310.20437
It is well-known that in unimodular gravity the cosmological constant is not sourced by a constant energy density, but rather appears as some sort of integration constant. In this work we try to flesh this out by studying in some detail a couple of e
Externí odkaz:
http://arxiv.org/abs/2310.16522
Autor:
Hernández-Cabrera, Juan F., De Miguel, Javier, Hernández-Suárez, E., Joven-Álvarez, Enrique, Lorenzo-Hernández, H., Otani, Chiko, Rapado-Tamarit, Miguel A., Rubiño-Martín, J. Alberto
The axion is a hypothetical boson arising from the most natural solution to the problem of charge and parity symmetry in the strong nuclear force. Moreover, this pseudoscalar emerges as a dark matter candidate in a parameter space extending several d
Externí odkaz:
http://arxiv.org/abs/2310.16013