Zobrazeno 1 - 10
of 2 143
pro vyhledávání: '"AZEVEDO, R."'
Publikováno v:
Journal of Computing in Higher Education,2021, 33, 614-634
The aim of this study was to predict university students' learning performance using different sources of data from an Intelligent Tutoring System. We collected and preprocessed data from 40 students from different multimodal sources: learning strate
Externí odkaz:
http://arxiv.org/abs/2403.07194
Publikováno v:
Check List, Vol 6, Iss 4, Pp 659-667 (2010)
Using information from all published reports and data collected during several parasitological surveys betweenApril 2003 and September 2009, a checklist of the parasites of fishes from Guandu River, southeastern of Brazil wasgenerated. A total of 85
Externí odkaz:
https://doaj.org/article/16cd9774f6e646fb95df47f414738402
Cosmological Implications of Nonminimally-Coupled $f(R)$ Gravity and the Lagrangian of Cosmic Fluids
Autor:
Azevedo, R. P. L.
In the standard model of cosmology, the background evolution of the Universe can in general be adequately described by general relativity and a uniform and isotropic metric minimally coupled with a collection of perfect fluids. These fluids are usual
Externí odkaz:
http://arxiv.org/abs/2207.08578
Autor:
Avelino, P. P., Azevedo, R. P. L.
In the context of general relativity, both energy and linear momentum constraints lead to the same equation for the evolution of the speed of free localized particles with fixed proper mass and structure in a homogeneous and isotropic Friedmann-Lema\
Externí odkaz:
http://arxiv.org/abs/2203.04022
Autor:
Azevedo, R. P. L., Avelino, P. P.
Publikováno v:
Phys. Rev. D 104, 084079 (2021)
We show that gravitational theories with a nonminimal coupling (NMC) to the matter fields lead to a violation of Etherington's distance-duality relation, which relates the luminosity and angular diameter distances. We derive constraints on power-law
Externí odkaz:
http://arxiv.org/abs/2104.01209
Publikováno v:
Phys. Rev. D 102, 063525 (2020)
We investigate the appropriateness of the use of different Lagrangians to describe various components of the cosmic energy budget, discussing the degeneracies between them in the absence of nonminimal couplings to gravity or other fields, and clarify
Externí odkaz:
http://arxiv.org/abs/2005.07739
Autor:
Avelino, P. P., Azevedo, R. P. L.
In this paper we demonstrate that Boltzmann's $H$-theorem does not necessarily hold in the context of theories of gravity with nonminimally coupled matter fields. We find sufficient conditions for the violation of Boltzmann's $H$-theorem and derive a
Externí odkaz:
http://arxiv.org/abs/2003.10154
Autor:
Azevedo, R. P. L., Avelino, P. P.
In the present work we show that the second law of thermodynamics does not generally hold if the matter and gravitational fields are nonminimally coupled. We demonstrate this result by explicitly computing the evolution of the entropy of the matter f
Externí odkaz:
http://arxiv.org/abs/1908.02629
Autor:
Wittenburg, P., Sustkova, H. Pergl, Montesanti, A., Bloemers, S. M., de Waard, S. H., Musen, M. A., Graybeal, J. B., Hettne, K. M., Jacobsen, A., Pergl, R., Hooft, R. W. W., Staiger, C., van Gelder, C. W. G., Knijnenburg, S. L., van Arkel, A. C., Meerman, B., Wilkinson, M. D., Sansone, S-A, Rocca-Serra, P., McQuilton, P., Gonzalez-Beltran, A. N., Aben, G. J. C., Henning, P., Alencar, S., Ribeiro, C., Silva, C. R. L., Sayao, L., Sales, L., Veiga, V., Lima, J., Dib, S., Xavier, P., Murtinho, R., Tendel, J., Schaap, B. F., Brouwer, P. M., Gavai, A. K., Bouzembrak, Y., Marvin, H. J. P., Mons, A., Kuhn, T., Gambardella, A. A., Azevedo, R. de Miranda, Muhonen, V., van der Naald, M., Smit, N. W., Buys, M. J., de Bruin, T. F., Schoots, F., Goodson, H. J. E., Rzepa, H. S., Jeffery, K. G., Shanahan, H. P., Axton, M., Tkachenko, V., Maya, A. D., Meyers, N. K., Conlon, M., Haak, L. L., Schultes, E. A.
There is a growing acknowledgement in the scientific community of the importance of making experimental data machine findable, accessible, interoperable, and reusable (FAIR). Recognizing that high quality metadata are essential to make datasets FAIR,
Externí odkaz:
http://arxiv.org/abs/1902.11162
Autor:
Azevedo, R. P. L., Avelino, P. P.
Publikováno v:
Phys. Rev. D 99, 064027 (2019)
In extended models of gravity a nonminimal coupling to matter has been assumed to lead to irreversible particle creation. In this paper we challenge this assumption. We argue that a non-minimal coupling of the matter and gravitational sectors results
Externí odkaz:
http://arxiv.org/abs/1901.06299