Navegação Ciências Exatas e da Terra por Título

Resultados 5842-5861 de 5972

    • Variabilidade de precipitação e temperatura média superficial do ar no norte da região de Aisén, Chile, no período de 1950-2017 

      Idalino, Filipe Daros; Valente, Pedro Teixeira; Rosa, Kátia Kellem da; Simões, Jefferson Cardia (2020) [Artigo de periódico]
      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 

      Weschenfelder, Jair; Ayup-Zouain, Ricardo Norberto (2002) [Artigo de periódico]
      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) 

      Ladwig, Ruben; Vigo, Álvaro; Fedeli, Ligia Maria Giongo; Chambless, Lloyd Ellwood; Benseñor, Isabela Judith Martins; Schmidt, Maria Inês; Vidigal, Pedro Guatimosim; Castilhos, Cristina Dickie de; Duncan, Bruce Bartholow (2016) [Artigo de periódico]
      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 

      Silveira, Fernando Lang da (2001) [Artigo de periódico]
      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 

      Balzaretti, Naira Maria; Denis, J.P.; Jornada, Joao Alziro Herz da (1993) [Artigo de periódico]
      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)? 

      Canelo, Carla Martinez; Friaça, Amâncio César Santos; Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Dutra, Daniel Ruschel (2018) [Artigo de periódico]
      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 

      Guimarães, Núbia Lúcia Cardoso; Notare, Márcia Rodrigues (2022) [Artigo de periódico]
      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 

      Ostrovski, F.; McMahon, Richard G.; Connolly, Andrew J.; Lemon, Cameron A.; Auger, Matthew W.; Banerji, M.; Hung, Johnathan M.; Koposov, Sergey E.; Lidman, Chris; Reed, Sophie L.; Allam, Sahar S.; Benoit-Lévy, Aurélien; Bertin, Emmanuel; Brooks, D.; Buckley-Geer, Elizabeth; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Cunha, Carlos Eduardo; Costa, Luiz N. da; Desai, S.; Diehl, H. Thomas; Dietrich, Jörg P.; Evrard, August E.; Finley, David A.; Flaugher, Brenna; Fosalba Vela, Pablo; Frieman, Joshua A.; Gerdes, David W.; Goldstein, Daniel Abraham; Gruen, Daniel; Gruendl, Robert A.; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lima, Marcos Vinicius Borges Teixeira; Lin, H.; Maia, Marcio Antonio Geimba; Marshall, Jennifer L.; Martini, Paul; Melchior, Peter M.; Miquel, Ramon; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Reil, Kevin; Romer, Kathy; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Scarpine, Victor Emanuel; Sevilla Noarbe, Ignacio; Soares-Santos, Marcelle; Sobreira, Flávia; Suchyta, Eric; Tarle, Gregory; Thomas, D.; Tucker, Douglas L.; Walker, Alistair (2017) [Artigo de periódico]
      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 

      Goncalves, Victor Paulo Barros; Machado, Magno Valério Trindade (2011) [Artigo de periódico]
      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 

      Golendziner, Lia Goldstein; Santos, Clesio Saraiva dos (1998) [Artigo de periódico]
      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 

      Wisniewski, J.P.; Ge, Jian; Crepp, Justin R.; De Lee, Nathan M.; Eastman, Jason; Esposito, Massimiliano; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Lee, Brian L.; Stassun, Keivan G.; Agol, Eric; Allende Prieto, Carlos; Barnes, Rory; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Mello, Gustavo Frederico Porto de; Femenía Castellá, B.; Ferreira, Letícia D.; Gary, Bruce L.; Hebb, Leslie; Holtzman, J.A.; Liu, Jian; Ma, Bo; Mack, C. E.; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Tofflemire, Benjamin M.; Wan, Xiaoke; Wang, Ji; Zhao, Bo (2012) [Artigo de periódico]
      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 

      Fleming, S.W.; Jian Ge; Barnes, Rory; Beatty, Thomas G.; Crepp, Justin R.; De Lee, Nathan M.; Esposito, Massimiliano; Femenía Castellá, B.; Ferreira, Letícia D.; Gary, Bruce L.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Hebb, Leslie; Jiang, Peng; Lee, Brian L.; Nelson, Ben; Mello, Gustavo Frederico Porto de; Shappee, Benjamin J.; Stassun, Keivan G.; Thompson, Todd; Tofflemire, Benjamin M.; Wisniewski, J.P.; Wood-Vasey, W.M.; Agol, Eric; Allende Prieto, Carlos; Bizyaev, D.; Brewington, Howard J.; Cargile, Phillip A.; Coban, Louis; Costello, Korena S.; Costa, Luiz N. da; Good, Melanie L.; Hua, Nelson; Kane, Stephen R.; Lander, Gary R.; Liu, Jian; Ma, Bo; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Malanushenko, E.; Malanushenko, V.; Muna, Demitri; Nguyen, D.C.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Rebolo, Rafael; Roebuck, Eric J.; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Sivarani, Thirupathi; Snedden, S.A.; Vincent, Chelsea L. M.; Wan, Xiaoke; Wang, Ji; Weaver, Benjamin A.; Weaver, Gwendolyn M.; Zhao, Bo (2012) [Artigo de periódico]
      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 

      Jiang, Peng; Ge, Jian; Cargile, Phillip A.; Crepp, Justin R.; De Lee, Nathan M.; Mello, Gustavo Frederico Porto de; Esposito, Massimiliano; Ferreira, Letícia D.; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Hebb, Leslie; Lee, Brian L.; Ma, Bo; Stassun, Keivan G.; Wang, Ji; Wisniewski, J.P.; Agol, Eric; Bizyaev, D.; Brewington, Howard J.; Chang, Liang; Costa, Luiz N. da; Eastman, Jason; Ebelke, Garrett L.; Gary, Bruce L.; Kane, Stephen R.; Li, Rui; Liu, Jian; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Malanushenko, V.; Malanushenko, E.; Muna, Demitri; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Audrey; Oravetz, Daniel J.; Pan, K.; Pepper, J.; Paegert, Martin; Allende Prieto, Carlos; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Sivarani, Thirupathi; Snedden, S.A.; Van Eyken, Julian C.; Wan, Xiaoke; Weaver, Benjamin A.; Zhao, Bo (2013) [Artigo de periódico]
      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 

      De Lee, Nathan M.; Ge, Jian; Crepp, Justin R.; Eastman, Jason; Esposito, Massimiliano; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Lee, Brian L.; Stassun, Keivan G.; Wisniewski, J.P.; Wood-Vasey, W.M.; Agol, Eric; Allende Prieto, Carlos; Barnes, Rory; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Mello, Gustavo Frederico Porto de; Ferreira, Letícia D.; Gary, Bruce L.; Hebb, Leslie; Holtzman, J.A.; Liu, Jian; Ma, Bo; Mack, C. E.; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Nguyen, D.C.; Oravetz, Audrey; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Malanushenko, E.; Malanushenko, V.; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Wan, Xiaoke; Wang, Ji; Zhao, Bo (2013) [Artigo de periódico]
      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 

      Ma, Bo; Ge, Jian; Barnes, Rory; Crepp, Justin R.; De Lee, Nathan M.; Ferreira, Letícia D.; Esposito, Massimiliano; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; Hebb, Leslie; González Hernández, Jonay I.; Lee, Brian L.; Mello, Gustavo Frederico Porto de; Stassun, Keivan G.; Wang, Ji; Wisniewski, J.P.; Agol, Eric; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Eastman, Jason; Gary, Bruce L.; Jiang, Peng; Kane, Stephen R.; Li, Rui; Liu, Jian; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Muna, Demitri; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Daniel J.; Pepper, J.; Paegert, Martin; Allende Prieto, Carlos; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Sivarani, Thirupathi; Van Eyken, Julian C.; Wan, Xiaoke; Weaver, Benjamin A.; Zhao, Bo (2013) [Artigo de periódico]
      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 

      Amaral, Livio; Scorzelli, R.B.; Brückmann, Magale Elisa; Paesano Junior, Andrea; Schmidt, Joao Edgar; Shinjo, Teruya; Hosoito, N. (1997) [Artigo de periódico]
      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 

      Wagner, Flávia; Pawlowski, Josiane; Yates, Denise Balem; Camey, Suzi Alves; Trentini, Clarissa Marceli (2010) [Artigo de periódico]
      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 

      Koval, Natalia; Borisov, Andrei G.; Rosa, Lucio Flavio dos Santos; Stori, Elis Moura; Dias, Johnny Ferraz; Grande, Pedro Luis; Sanchez-Portal, Daniel; Diez Muino, Ricardo (2017) [Artigo de periódico]
      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 

      Silva, Luciano Silva da; Scharcanski, Jacob (2010) [Artigo de periódico]
      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 

      Canto Filho, Alberto Bastos do; Lima, Jose Valdeni de; Ten Caten, Carla Schwengber; Tarouco, Liane Margarida Rockenbach (2014) [Artigo de periódico]
      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 ...