Navegação Ciências Exatas e da Terra por Título
Resultados 1975-1994 de 5964
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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 ... -
First measurement of quarkonium polarization in nuclear collisions at the LHC
(2021) [Artigo de periódico]The polarization of inclusive J/ψ and ϒ(1S) produced in Pb–Pb collisions at √sNN = 5.02 TeV at the LHC is measured with the ALICE detector. The study is carried out by reconstructing the quarkonium through its decay to ... -
First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at √s = 13 TeV
(2021) [Artigo de periódico]The first measurement of the inclusive cross section for top quark pairs (tt) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt events produced in ... -
First measurement of the |t|-dependence of coherent J/ψ photonuclear production
(2021) [Artigo de periódico]The first measurement of the cross section for coherent J/ψ photoproduction as a function of |t|, the square of the momentum transferred between the incoming and outgoing target nucleus, is presented. The data were measured ... -
First measurement of Ξ0c production in pp collisions at √s = 7 TeV
(2018) [Artigo de periódico]The production of the charm-strange baryon 0cis measured for the first time at the LHC via its semileptonic decay into e+ −νein ppcollisions at √s=7TeV with the ALICE detector. The transverse momentum (pT) differential ... -
First measurements of N-subjettiness in central Pb-Pb collisions at √sNN = 2.76 TeV
(2021) [Artigo de periódico]The ALICE Collaboration reports the first fully-corrected measurements of the N-subjettiness observable for track-based jets in heavy-ion collisions. This study is performed using data recorded in pp and Pb-Pb collisions ... -
First observation of an attractive interaction between a proton and a cascade baryon
(2019) [Artigo de periódico]This Letter presents the first experimental observation of the attractive strong interaction between a proton and a multistrange baryon (hyperon) Ξ−. The result is extracted from two-particle correlations of combined ... -
First-principles calculation of the structure and elastic properties of a 3D-polymerized fullerite
(2002) [Artigo de periódico]In this paper we present results obtained from first-principles calculations concerning the crystal structure and elastic properties of a three-dimensional-polymerized fullerite. The orthorhombic structure we studied was ... -
First 'Rauisuchian' archosaur (Pseudosuchia, Loricata) for the Middle Triassic Santacruzodon Assemblage Zone (SantaMaria Supersequence), Rio Grande do Sul State, Brazil
(2015) [Artigo de periódico]The ‘Rauisuchia’ are a group of Triassic pseudosuchian archosaurs that displayed a near worldwide distribution. In Brazil, their fossils are found only in the Santa Maria Formation (Paraná Basin) of the Rio Grande do Sul ... -
First report of chemical composition and cytotoxicity evaluation of Foraminispora rugosa basidiomata from Brazil
(2022) [Artigo de periódico]Foraminispora rugosa is a species reported from Brazil, Venezuela, French Guiana, Costa Rica and Cuba. It is a basidiomycete in the Ganodermataceae family. In this study, both chemical composition and cytotoxicity of the ...