Navegação Ciências Exatas e da Terra por Título
Resultados 1966-1985 de 5964
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Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production
(2017) [Artigo de periódico]This work aimed to produce graphene oxide with few graphene layers, a low number of defects, good conductivity and reasonable amount of oxygen, adequate for use as filler in polymeric composites. Two starting materials ... -
Fibra de palmeira como substrato para hortaliças
(2014) [Artigo de periódico]Este trabalho teve por objetivo estudar a possibilidade de aproveitamento dos resíduos provenientes da indústria de conserva de palmito como substrato para hortaliças. Assim, a fibra da palmeira real australiana (Archontophoenix ... -
Fickian crossover and length scales from two point functions in supercooled liquids
(2006) [Artigo de periódico]Particle motion of a Lennard-Jones supercooled liquid near the glass transition is studied by molecular dynamics simulations. We analyze the wave vector dependence of relaxation times in the incoherent self-scattering ... -
Field and oxygen dependence of the magnetic irreversibility line in yba(2)cu(3)o(7-g)
(1994) [Artigo de periódico]We report on de magnetic susceptibility measurements in polycrystalline YBa2Cu30 7- δ as a function of the oxygen content in the limit of small δ. We focus mainly on the detailed behavior of the zero-fie1dcooled- field-cooled ... -
Field color magnitude diagram analysis along the bulge major axis
(1993) [Artigo de periódico]We analyze background fields along the bulge major axis away from the Galactic center by 2°.5, 13° and 31°. Our aim is to study the spatial distribution of different steiiar populations. A similar component of young disk ... -
Field galaxies at intermediate redshift (0.2 < z < 0.8) in the direction of the galaxy cluster LCDCS-S001
(2007) [Artigo de periódico]We present a spectroscopic and photometric analysis for eight field galaxies in the direction of the galaxy cluster LCDCS-S001. The spectra were obtained with the GMOS instrument at the Gemini South Observatory. The objects ... -
A filosofia da ciência de Karl Popper : o racionalismo crítico
(1996) [Artigo de periódico]A filosofia de Karl Popper - o racionalismo crítico - é apresentada. Para ele todo o conhecimento é falível e corregível, virtualmente provisório. O conhecimento científico é criado, construído e não descoberto em conjuntos ... -
A filosofia da ciência e o ensino das ciências
(1992) [Artigo de periódico] -
A filosofia de Karl Popper e suas implicações no ensino da ciência
(1989) [Artigo de periódico]Resumo não disponível -
A filosofia sistêmica de Fritjof Capra : um olhar ecológico para a Física e para o Ensino de Física
(2019) [Artigo de periódico]Neste artigo, apresentamos a Filosofia Sistêmica de Fritjof Capra. A partir de sua obra é possível distinguir a existência de dois paradigmas (entendidos como molduras filosóficas) no desenvolvimento da ciência moderna: o ... -
Final stages of N-body star cluster encounters
(2000) [Artigo de periódico]We performed numerical simulations of star cluster encounters with Hernquist's treecode on a CRAY YMP-2E computer. We used different initial conditions (relative positions and velocities, cluster sizes, masses and concentration ... -
Financiamento público no Brasil para a publicação de artigos em acesso aberto : alguns apontamentos
(2017) [Artigo de periódico]O número de revistas de acesso aberto aumentou ao longo dos últimos anos e o pagamento de taxa de processamento de artigo (Article Processing Charge) tem sido o modelo de sustento adotado por algumas editoras. O objetivo ... -
Finite-size effects in Anderson localization of one-dimensional Bose-Einstein condensates
(2010) [Artigo de periódico]We investigate the disorder-induced localization transition in Bose-Einstein condensates for the Anderson and Aubry-Andr´e models in the noninteracting limit using exact diagonalization. We show that, in addition to the ... -
Finite-size effects in isobaric ratios
(2012) [Artigo de periódico]The properties of isobaric ratios, between nuclei produced in the same reaction, are investigated using the canonical and grand-canonical statistical ensembles. Although the grand-canonical formulas furnish a means to ... -
Fire events and vegetation dynamics during the late Pleistocene-Meghalayan interval in the southernmost Brazilian coastal plain comments on the endocranial morphology
(2020) [Artigo de periódico]The present study analyzes the correspondence between charcoal concentrations and changes in the palynological composition in a core from Águas Claras peatland (30º06’24.39” S; 50º49’04.90” W) in the coastal plain of ... -
First cosmology results using SNe Ia from the dark energy survey : analysis, systematic uncertainties, and validation
(2019) [Artigo de periódico]We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified SNe Ia from the first 3 years of the Dark Energy Survey Supernova Program (DES-SN), spanning a redshift ... -
First detection of the 448 GHz H2O transition in space
(2017) [Artigo de periódico]We present the first detection of the ortho-H2O 423330 transition at 448 GHz in space. We observed this transition in the local (z = 0:010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama ... -
First measurement of + c production down to pT = 0 in pp and p-Pb collisions at √sNN = 5.02 TeV
(2023) [Artigo de periódico]The production of prompt + c baryons has been measured at midrapidity in the transverse momentum interval 0 < pT < 1 GeV/c for the first time, in pp and p–Pb collisions at a center-of-mass energy per nucleon-nucleon collision ... -
First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC
(2018) [Artigo de periódico]This letter presents the first measurement of jet mass in Pb–Pband p–Pbcollisions at √sNN=2.76TeV and √sNN=5.02TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the ... -
First measurement of large area jet transverse momentum spectra in heavy-ion collisions
(2021) [Artigo de periódico]Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to ...
