Zobrazeno 1 - 10
of 529
pro vyhledávání: '"Guimarães, R. A."'
We present an investigation of the properties of the extended Ly$\alpha$ halo and the large-scale \ion{H}{I} absorbing structures associated with 5 high-redshift radio galaxies at z $>$ 2, using the Goodman long-slit spectrograph on the SOAR telescop
Externí odkaz:
http://arxiv.org/abs/1809.03340
Autor:
Alves, L. G. A., Scariot, D. B., Guimarães, R. R., Nakamura, C. V., Mendes, R. S., Ribeiro, H. V.
Publikováno v:
PLoS ONE 11(3): e0152092 (2016)
We report on a diffusive analysis of the motion of flagellate protozoa species. These parasites are the etiological agents of neglected tropical diseases: leishmaniasis caused by Leishmania amazonensis and Leishmania braziliensis, African sleeping si
Externí odkaz:
http://arxiv.org/abs/1603.02995
Autor:
de Oliveira, F., Leira, F., Braga, L., Zamprogno, P., Aversa, A., Guimarães, R., Carvalho, F.
Publikováno v:
In Interdisciplinary Neurosurgery: Advanced Techniques and Case Management March 2021 23
Autor:
Guimarães, R. N., Petitjean, P., Rollinde, E., Djorgovski, S. G., da Silva, M. S., Moret, M. A
We use, for the first time, the Detrend Fluctuation Analysis (DFA) to study the correlation properties of the transmitted flux fluctuations, in the Lyman-$\alpha$ (Ly$\alpha$) Forest along the lines of sight (LOS) to QSOs, at different space scales.
Externí odkaz:
http://arxiv.org/abs/1310.5765
Autor:
Ribeiro, H. V., Guimaraes, R. R., Teixeira-Souza, R. T., Mukai, H., Fernandes, P. R. G., Lenzi, E. K., Mendes, R. S.
Publikováno v:
Phys. Rev. E 87, 054501 (2013)
We report on the dynamical behavior of defects of strength s = +/- 1/2 in a lyotropic liquid crystal during the annihilation process. By following their positions using time resolved polarizing microscopy technique, we present statistically significa
Externí odkaz:
http://arxiv.org/abs/1305.5421
Topological defects can appear whenever there is some type of ordering. Its ubiquity in nature has been the subject of several studies, from early Universe to condensed matter. In this work, we investigated the annihilation dynamics of defects and an
Externí odkaz:
http://arxiv.org/abs/1304.5539
Autor:
Salem-Sugui Jr, S., Alvarenga, A. D., Noce, R. D., Guimaraes, R. B., Mejia, C. Salazar, Salim, H., Gandra, F. G.
Publikováno v:
AIP Advances 2, 032168 (2012)
We report on the magnetic properties of a special configuration of a FeRh thin film. An anomalous behavior on the magnetisation vs. temperature was observed when low magnetic fields are applied in the plane of a thin layer of FeRh deposited on ordere
Externí odkaz:
http://arxiv.org/abs/1212.3487
Autor:
Guimarães, R., Noterdaeme, P., Petitjean, P., Ledoux, C., Srianand, R., Lopez, S., Rahmani, H.
We present the elemental abundance and H2 content measurements of a Damped Lyman-{\alpha} (DLA) system with an extremely large H i column density, log N(H i) (cm-2) = 22.0+/-0.10, at zabs = 3.287 towards the QSO SDSS J 081634+144612. We measure colum
Externí odkaz:
http://arxiv.org/abs/1205.2322
A new method is proposed to measure the Hubble constant H0 through the mean transmitted flux observed from high redshift quasars. A semi-analytical model for the cosmological-independent volume density distribution function is adopted which allows on
Externí odkaz:
http://arxiv.org/abs/1201.1260
Autor:
Luna, H., Franceschini, D. F., Prioli, R., Guimarães, R. B., Sanchez, C. M., Canal, G. P., Barbosa, M. D. L., Galvão, R. M. O.
Nanostrucured Europium oxide and hydroxide films were obtained by pulsed Nd:Yag (532 nm) laser ablation of an Europium metallic target, in the presence of a 1 mbar Helium buffer atmosphere. Both the produced film and the ambient plasma were character
Externí odkaz:
http://arxiv.org/abs/0911.2790