Zobrazeno 1 - 10
of 3 286
pro vyhledávání: '"Goncalves J"'
Autor:
Gonçalves, J. S., Santos, A. F.
In this paper, $f(R,T,R_{\mu\nu} T^{\mu\nu}$) gravity is considered. It is a modified theory of gravity that exhibits a strong coupling of gravitational and matter fields. Therefore, if gravity is governed by this model a number of issues must be re-
Externí odkaz:
http://arxiv.org/abs/2210.13251
The assessment and treatment of motor symptoms such as tremor in Parkinson's disease depends exclusively on the physician's visual observation of standardised movements (i.e. motor tasks). Wearable sensors such as accelerometers are able to detect so
Externí odkaz:
http://arxiv.org/abs/2108.01736
Autor:
Gonçalves, J. S., Santos, A. F.
In this paper, the hybrid metric-Palatini gravity is an approach to modified gravity in which is added to the usual Einstein-Hilbert action a supplementary term containing a Palatini-type correction of the form $f({\cal R},T)$. Here, ${\cal R}$ is th
Externí odkaz:
http://arxiv.org/abs/2107.00393
Autor:
Gonçalves, E.S., Gonçalves, J., Rosse, H., Costa, J., Jorge, L., Gonçalves, J.A., Coelho, J.P., Ribeiro, J.E.
Publikováno v:
In Procedia Structural Integrity 2024 54:91-98
Autor:
Gonçalves, E.S., Gonçalves, J., Rosse, H., Costa, J., Jorge, L., Gonçalves, J.A., Coelho, J.P., Ribeiro, J.E.
Publikováno v:
In Procedia Structural Integrity 2024 54:83-90
Autor:
Gonçalves, J. S., Santos, A. F.
The Palatini $f(R,T)$ gravity theory is considered. The standard Einstein-Hilbert action is replaced by an arbitrary function of the Ricci scalar $R$ and of the trace $T$ of the energy-momentum tensor. In the Palatini approach, the Ricci scalar is a
Externí odkaz:
http://arxiv.org/abs/2011.13264
Autor:
Gonçalves, J. S., Santos, A. F.
The $k$-essence modified $f(R)$ gravity model, i.e., $f(R,\phi,X)$ theory is studied. The question of violation of causality, in the framework of G\"{o}del-type universes, is investigated in this gravitational model. Causal and non-causal solutions a
Externí odkaz:
http://arxiv.org/abs/2011.08005
Autor:
Zyabkin, D. V., Gunnlaugsson, H. P., Goncalves, J. N., Bharuth-Ram, K., Qi, B., Unzueta, I., Naidoo, D., Mantovan, R., Masenda, H., Olafsson, S., Peters, G., Schell, J., Vetter, U., Dimitrova, A., Krischok, S., Schaaf, P.
In this study we report on the results from emission $^{57}$Fe M${\"o}$ssbauer Spectroscopy experiments, using dilute $^{57}$Mn implantation into pristine (TiO$_2$) and hydrogenated anatase held at temperatures between 300-700 K. Results of the elect
Externí odkaz:
http://arxiv.org/abs/2003.07600
Autor:
Pacheco, A., Gorbeña, E., Plomaritis, T. A., Garel, E., Gonçalves, J. M. S., Bentes, L., Monteiro, P., Afonso, C. M. L., Oliveira, F., Soares, C., Zabel, F., Sequeira, S.
Publikováno v:
Energy 158 (2018) 89-104
This paper presents the results of a pilot experiment with an existing tidal energy converter (TEC), Evopod 1 kW floatable prototype, in a real test case scenario (Faro Channel, Ria Formosa, Portugal). A baseline marine geophysical, hydrodynamic and
Externí odkaz:
http://arxiv.org/abs/1909.11697
Autor:
Wang, C., Jiang, W., Yang, K., Sarsenbayeva, Z., Tag, B., Dingler, T., Goncalves, J., Kostakos, V.
Publikováno v:
In Journal of Hospital Infection September 2023 139:113-120