Navegação Ciências Exatas e da Terra por Título
Resultados 1047-1066 de 5972
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A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi
(2010) [Artigo de periódico]We analyze the correlation of the positions of γ -ray sources in the Fermi Large Area Telescope (LAT) First Source Catalog (1FGL) and the First LAT Active Galactic Nuclei (AGNs) Catalog (1LAC) with the arrival directions ... -
Correlation between the magnetic irreversibility limit and the zero resistance point in different granular YBa/sub 2/Cu/sub 3/O/sub 7-σ superconductors
(2008) [Artigo de periódico]We report on magnetization and magnetoresistance measurements of single-crystal, melt-processed, and polycrystalline YBa2Cu3O7− samples with the purpose of disclosing the connection between the magnetic irreversibility ... -
A correlation between the stellar and [Fe II] velocity dispersions in active galaxies
(2013) [Artigo de periódico]We use near-infrared (near-IR) spectroscopic data from the inner few hundred parsecs of a sample of 47 active galaxies to investigate possible correlations between the stellar velocity dispersion (σ ), obtained from the ... -
Correlation decay and partial coherence in nonlinear wave interactions
(2003) [Artigo de periódico]In the present analysis we study the broad-band triplet interaction in regimes of large amplitudes. Linear response theories associated with nonlinear arguments are used to show that even though coherence of highfrequency ... -
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV
(2021) [Artigo de periódico]Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle ... -
Correspondence analysis applied to ethnografic data : case examples
(1992) [Artigo de periódico]Resumo não disponível -
Corrosion and wear resistance of carbon films obtained by electrodeposition on ferritic stainless steel
(2015) [Artigo de periódico]In improving the corrosion and hardness proprieties of ferritic stainless steel, the use of protective coatings becomes an interesting alternative. In this study, a carbon layer was deposited on AISI 430 by electrodeposition ... -
Corrosion behavior of steel coated with thin film tin/ti composites
(1993) [Artigo de periódico]Thin film multilayered TiN/Ti composites are investigated as a possible alternative for protective coating of steels. Corrosion tests based in cyclovoltametry made in a buffered acetic acid solution reveal that multilayered ... -
Corrosion behavior of Ti and Ti6A14V in citrate buffers containing fluoride ions
(2010) [Artigo de periódico]The effect of fluoride ions concentration on the electrochemical behavior of Ti grade 2 and Ti6Al4V in citrate buffers was studied. Open circuit potential (OCP) measurements and voltammetric studies of the samples in the ... -
Corrosion behaviour of iron and AISI 304 stainless steel in tungstate aqueous solutions containing chloride
(2003) [Artigo de periódico]O comportamento do ferro e do aço inoxidável AISI 304 frente à corrosão em solução aquosa de tungstato de sódio em presença de cloreto foi investigado usando as técnicas de voltametria cíclica, medidas de potencial de ... -
Cosmologias racializadas : processos políticos e educativos anti(racistas) no ensino de Física e Astronomia
(2021) [Artigo de periódico]Os modelos cosmológicos desenvolvidos pela Astronomia e pela Física são considerados fundamentais não apenas para a construção histórica do conceito moderno e contemporâneo de ciência, mas também como elementos fundantes ... -
Cosmopolíticas da tradução : a potência epistêmica das literaturas negras e indígenas
(2023) [Artigo de periódico]Um dos grandes desafios para o corpo de conhecimento brasileiro, em todas as áreas do conhecimento, é a desarticulação do racismo em suas variadas facetas, sendo o racismo epistêmico, institucional e linguístico de maior ... -
Costa de fiordes da Patagônia Central, Chile, morfologia submarina e fácies acústicas
(2006) [Artigo de periódico]Esse estudo interpreta os perfis acústicos de subfundo e modelos 3D submarinos de alguns fiordes adjacentes ao Campo de Gelo Patagônico Sul, Chile. As bacias aprofundadas mostram a morfologia irregular e distintas formas ... -
O cotidiano da sala de aula de uma disciplina de história e epistemologia da física para futuros professores de física
(2007) [Artigo de periódico]Neste trabalho procuramos descrever o processo de construção de uma compreensão descritiva contextualizada da cultura de sala de aula de uma disciplina de História e Epistemologia da Física do currículo de formação de ... -
Could the reproductive system explain the stability and long-term persistence in a natural hybrid zone of Petunia (Solanaceae)?
(2021) [Artigo de periódico]The long-term success of populations is dependent on individual reproductive success, and in general, increased population size and genetic diversity contribute to population maintenance, reducing the risk of local extinction. ... -
Coulomb corrections to inclusive cross sections at the future Electron-Ion Collider
(2018) [Artigo de periódico]The experimental results of the future Electron-Ion (eA) Collider are expected to constrain the dynamics of the strong interactions at small values of the Bjorken x variable and large nuclei. Recently it has been suggested ... -
Coulomb heating of channeled C+ and C2+ molecules in Si
(2008) [Artigo de periódico]Si x-ray and backscattering yields have been measured as a function of the C⁺ and C₂⁺ entrance angle along the Si ‹100› channel in an energy interval between 900 and 2200 keV/atom. A significant enhancement of the x-ray ... -
Coulomb heating of channeled H/sup + sub 2/ and H/sup + sub 3/ molecules in Si
(2004) [Artigo de periódico]Si-K x-ray and backscattering yields have been measured as a function of the projectile entrance angle for atomic and molecular (H2 + and H3 +) hydrogen ions channeling at kinetic energies of 150 keV per proton along the ... -
Counterion correlations and attraction between like-charged macromolecules
(2001) [Artigo de periódico]A simple model is presented for the appearance of attraction between two like-charged polyions inside a polyelectrolyte solution. The polyions are modeled as rigid cylinders in a continuum dielectric solvent. The strong ... -
Counting orientations of graphs with no strongly connected tournaments
(2021) [Artigo de periódico]Let Sk(n) be the maximum number of orientations of an n-vertex graph G in which no copy of Kk is strongly connected. For all integers n, k ≥ 4 where n ≥ 5 or k ≥ 5, we prove that Sk(n) = 2tk - 1(n), where tk-1(n) is the ...