Browsing Exact and Earth Sciences by Title
Now showing items 5842-5861 of 5972
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Variabilidade de precipitação e temperatura média superficial do ar no norte da região de Aisén, Chile, no período de 1950-2017
(2020) [Journal article]Este artigo investiga a variabilidade de temperatura e precipitação na região do Monte Melimoyu (44º5’S-72º51’O), entre 1950 e 2017 e a possível influência do ENOS e do SAM pela proximidade com o oceano Pacífico. Foram ... -
Variabilidade morfodinâmica das praias oceânicas entre Imbé e Arroio do Sal, RS, Brasil
(2002) [Journal article]The morphodynamic variability of the oceanic beaches between Imbé and Arroio do Sal towns, Rio Grande do Sul State, Brazil, was investigated by means of periodic beach profiling combined with the interpretation of granulometric ... -
Variability in baseline laboratory measurements of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil)
(2016) [Journal article]Multi-center epidemiological studies must ascertain that their measurements are accurate and reliable. For laboratory measurements, reliability can be assessed through investigation of reproducibility of measurements in ... -
As variações dos intervalos de tempo entre as fases principais da lua
(2001) [Journal article]Os intervalos de tempo entre as sucessivas fases principais da Lua (Nova, Quarto Crescente, Cheia e Quarto Minguante) não são identicos e apresentam pronunciadas variacões ao longo do tempo. Neste trabalho e elaborada uma ... -
Variation of the refractive index and polarizability of sapphire under high pressures
(1993) [Journal article]In this article we present the experimental results for the pressure variation of the refractive index of sapphire up to 16 GPa, obtained with an interferometric method, using the diamond anvil cell. In the range of ... -
Variations in the 6.2 μm emission profile in starburst-dominated galaxies : a signature of polycyclic aromatic nitrogen heterocycles (PANHs)?
(2018) [Journal article]Analyses of the polycyclic aromatic hydrocarbon (PAH) feature profiles, especially the 6.2 μm feature, could indicate the presence of nitrogen incorporated in their aromatic rings. In thiswork, 155 predominantly ... -
A variável visual seção plana e o GeoGebra 3D na atividade cognitiva de conversão entre representações semióticas das superfícies quádricas
(2022) [Journal article]Esse artigo tem por objetivo apresentar a análise teórica de um modelo que explora a variável visual seção plana associada ao GeoGebra 3D no estudo das superfícies quádricas. O presente estudo é parte de uma pesquisa de ... -
VDES J2325−5229 a z = 2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning
(2017) [Journal article]We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift zs = 2.74 and image separation of 2.9 arcsec lensed by a foreground zl = 0.40 elliptical galaxy. Since ... -
Vector meson production in coherent hadronic interactions : update on predictions for energies available at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider
(2011) [Journal article]In this Rapid Communication we update our predictions for the photoproduction of vector mesons in coherent pp and AA collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies using the ... -
Versions and configurations in object-oriented database systems : a uniform treatment
(1998) [Journal article]Object-oriented database models usually allow versions only at the most specialized type/c1ass in an inheritance hierarchy. The possibility of having versions at different levels of abstraction provides a richer model and ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. I. A low-mass ratio stellar companion to TYC 4110-01037-1 in a 79 day orbit
(2012) [Journal article]TYC 4110-01037-1 has a low-mass stellar companion, whose small mass ratio and short orbital period are atypical among binary systems with solar-like (Teff 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. II. A short-period companios orbiting an F star with evidence of a stellar tertiary and significant mutual inclination
(2012) [Journal article]We report the discovery via radial velocity (RV) measurements of a short-period (P = 2.430420±0.000006 days) companion to the F-type main-sequence star TYC 2930-00872-1. A long-term trend in the RV data also suggests the ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. IV. A candidate bronw dwarf or low-mass stellar companion HIP 67526
(2013) [Journal article]We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b
(2013) [Journal article]We describe the discovery of a likely brown dwarf (BD) companion with a minimum mass of 31.7 ± 2.0 MJup to GSC 03546-01452 from the MARVELS radial velocity survey, which we designate as MARVELS-6b. For reasonable priors, ... -
Very-low-mass stellar and substellar companion to solar-like stars from MARVELS. III. A short-period brown dwarf cadidate around an active G0IV subgiant
(2013) [Journal article]We present an eccentric, short-period brown dwarf candidate orbiting the active, slightly evolved subgiant star TYC 2087-00255-1, which has effective temperature Teff = 5903±42 K, surface gravity log(g) = 4.07±0.16 (cgs), ... -
Very thin Fe/Ni modulation multilayer films under ion bombardment
(1997) [Journal article]We investigated the effect of noble gas irradiation (He, Ne, and Xe) on Fe–Ni multilayers with a very thin modulation and nominal composition in the Invar region Fe0.63Ni0.37. The evaluation of the formation/stability of ... -
Viabilidade da estimativa de QI a partir dos subtestes vocabulário e cubos das WAIS-III
(2010) [Journal article]Objetivou-se avaliar a viabilidade de estimar o Quociente de Inteligência (QI) de adultos por meio de duas estratégias que utilizam uma forma curta constituída pelos subtestes Vocabulário e Cubos da Escala Wechsler de ... -
Vicinage effect in the energy loss of H2 dimers : experiment and calculations based on time-dependent density-functional theory
(2017) [Journal article]We present a combined theoretical and experimental study of the energy loss of H2 + molecular ions interacting with thin oxide and carbon films.As a result of quantum mechanical interference of the target electrons, the ... -
Video segmentation based on motion coherence of particles in a video sequence
(2010) [Journal article]This work describes an approach for object-oriented video segmentation based on motion coherence. Using a tracking process based on adaptively sampled points (namely, particles), 2-D motion patterns are identified with an ... -
Vídeos, questões e desempenho : uma análise quantitativa em cursos de engenharia
(2014) [Journal article]A contribuição deste artigo é uma análise quantitativa de resultados obtidos numa metodologia em que são utilizados vídeos de curta duração e questões complexas como complemento a aulas expositivas tradicionais. Foi realizada ...