Navegação Ciências Exatas e da Terra por Título
Resultados 2567-2586 de 5955
-
Integral field spectroscopy of the inner kpc of the elliptical galaxy NGC 5044
(2017) [Artigo de periódico]We used Gemini Multi-Object Spectrograph in the integral field unit mode to map the stellar population, emission-line flux distributions and gas kinematics in the inner kpc of NGC 5044. From the stellar populations synthesis, ... -
Integrals of motion and quantum operators for hydrogenic atoms in external fields
(2000) [Artigo de periódico]We report five cases of integrability for a hydrogenic atom under three static external fields: a magnetic field, an electric field, and a van der Waals interaction. Exact integrals of motion and corresponding quantum ... -
Integrated analysis of the critical region 5p15.3-p15.2 associated with cri-du-chat syndrome
(2019) [Artigo de periódico]Cri-du-chat syndrome (CdCs) is one of the most common contiguous gene syndromes, with an incidence of 1:15,000 to 1:50,000 live births. To better understand the etiology of CdCs at the molecular level, we investigated ... -
Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud
(2005) [Artigo de periódico]We present in this study flux-calibrated integrated spectra in the range (3600–6800) Å for 18 concentrated SMC clusters. Cluster reddening values were estimated by interpolation between the extinction maps of Burstein & ... -
Integrated spectral evolution of Galactic open clusters
(2002) [Artigo de periódico]We present a library of 47 open-cluster integrated spectra, mostly obtained at CASLEO (San Juan, Argentina) in the range 3600<λ<7400 Å, which are made available at CDS. The data are combined with previous spectra to obtain ... -
Integrated spectral properties of 22 small angular diameter galactic open clusters
(2007) [Artigo de periódico]Aims. Flux-calibrated integrated spectra of a sample of 22 Galactic open clusters of small angular diameter are presented. With one exception (ESO429-SC2), all objects have Galactic longitudes in the range 208° < l < 33°. ... -
Integrated spectral properties of star clusters in the near-ultraviolet
(1994) [Artigo de periódico]We study integrated spectra of 37 star clusters in the range 3100-4200 Å. The sample includes Galactic globular and open clusters, as well as Magellanic Cloud clusters. Feature equivalent widths (W) and continuum distribution ... -
Integrated spectra of Milky Way globular clusters
(2019) [Artigo de periódico]Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected from their location in the Galactic bulge, ... -
Integrated UBV photometry of 624 star clusters and associations in the Large Magellanic Cloud
(1996) [Artigo de periódico]We present a catalogof integrated UBV photometry of 504 star clusters and 120 stellar associations in the LMC, part ofthem still embedded in emitting gas. We study age groups in terms of equivalent SWB types derived from ... -
Integrity of hafnium silicate/silicon dioxide ultrathin films on Si
(2002) [Artigo de periódico]Rapid thermal annealing at 1000 °C of (HfO2)12x(SiO2)x pseudobinary alloy films deposited on Si were performed in N2 or O2 atmospheres. The effects on the atomic transport, structure, and composition were investigated using ... -
Intensidade de uso de crack de acordo com a classe econômica de usuários internados na cidade de Porto Alegre/Brasil
(2012) [Artigo de periódico]Objetivos: Investigar se há associação entre intensidade e frequência de uso de crack e o nível econômico de dependentes da droga e verificar se há relação entre classe econômica e intensidade e frequência de uso de crack ... -
Interação e aprendizagem
(2006) [Artigo de periódico]Este artigo objetiva refletir sobre as dimensões teóricas, metodológicas e conceituais envolvidas na aplicação do ensino ao longo da educação básica, especialmente a de nível médio. A partir disso, apresenta as PROVAS ... -
Interações discursivas on-line sobre epistemologia entre professores de Física : uma análise pautada em princípios do referencial sociocultural
(2006) [Artigo de periódico]O presente estudo teve como objetivo analisar interações online em um fórum de discussão que fez parte de uma atividade a distância viabilizada pelo ambiente virtual InterAge (Rezende et al., 2003), na disciplina de ... -
Interacting bosons in a triple well : preface of many-body quantum chaos
(2022) [Artigo de periódico]Systems of interacting bosons in triple-well potentials are of significant theoretical and experimental interest. They are explored in contexts that range from quantum phase transitions and quantum dynamics to semiclassical ... -
Interaction between random heterogeneously charged surfaces in an electrolyte solution
(2015) [Artigo de periódico]We study, using Monte Carlo simulations, the interaction between infinite heterogeneously charged surfaces inside an electrolyte solution. The surfaces are overall neutral with quenched charged domains. An average over the ... -
Interaction effects on galaxy pairs with Gemini/GMOS- I : electron density
(2014) [Artigo de periódico]We present an observational study about the impacts of the interactions on the electron density of HII regions located in seven systems of interacting galaxies. The data consist of long-slit spectra in the range 4400–7300 ... -
Interaction effects on galaxy pairs with Gemini/GMOS- III : stellar population synthesis
(2017) [Artigo de periódico]We present an observational study of the impacts of interactions on the stellar population in a sample of galaxy pairs. Long-slit spectra in the wavelength range 3440–7300 Å obtained with the Gemini Multi-Object Spectrograph ... -
Interaction effects on galaxy pairs with Gemini/GMOS – II oxygen abundance gradients
(2014) [Artigo de periódico]In this paper, we derive oxygen abundance gradients from HII regions located in 11 galaxies in eight systems of close pairs. Long-slit spectra in the range 4400–7300 Å were obtained with the Gemini Multi-Object Spectrograph ... -
Interaction fields evaluation in fine particle systems
(1997) [Artigo de periódico]A computer simulation model for estimation of the interaction fields in fine particle systems has been developed. The method uses the experimental 8Mα(H) plot, constructed from the Fourier description of the initial ... -
Interaction of HfO/sub 2//SiO/sub 2/Si structures with deuterium gas
(2006) [Artigo de periódico]HfO2 films 2.5 to 12 nm deposited on thermal SiO2 1.5 nm on Si were annealed in deuterium gas at 400–600 °C and incorporated D amounts were quantified using the D 3He, p 4He nuclear reaction.We found 1013 D cm−2 in the ...
