Ciências Exatas e da Terra: Últimas Submissões
Resultados 501-510 de 6389
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Erosão nos campos sulinos : arenização no sudoeste do Rio Grande do Sul
(2011) [Artigo de periódico]O sudoeste do Rio Grande do Sul apresenta um conjunto de áreas sem cobertura vegetal que formam, visualmente, extensas áreas de solo exposto (areais). Para sintetizar a explicação deste processo, Suertegaray (1987,1992,1994) ... -
Apresentação*
(1999) [Texto de apresentação/encerramento] -
Sulfur-doped g-C3N4 heterojunctions for efficient visible light degradation of methylene blue
(2023) [Artigo de periódico]The discharge of synthetic dyes from different industrial sources has become a global issue of concern. Enormous amounts are released into wastewater each year, causing concerns due to the high toxic consequences. ... -
Observation of τ lepton pair production in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
(2023) [Artigo de periódico]We present an observation of photon-photon production of τ lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404 μb−1 collected by the CMS ... -
Measurement of the dependence of the hadron production fraction ratios fs/fu and fd/fu on B meson kinematic variables in proton-proton collisions at √s = 13 TeV
(2023) [Artigo de periódico]The dependence of the ratio between the B0s and B+ hadron production fractions, fs/fu, on the transverse momentum (pT) and rapidity of the B mesons is studied using the decay channels B0s → J/ψϕ and B+ → J/ψK+. The analysis ... -
A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at √s = 13 TeV
(2023) [Artigo de periódico]A search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has been performed using proton-proton ... -
Measurement of the mass dependence of the transverse momentum of lepton pairs in Drell–Yan production in proton–proton collisions at √s = 13 TeV
(2023) [Artigo de periódico]The double differential cross sections of the Drell–Yan lepton pair (l+ l−, dielectron or dimuon) production are measured as functions of the invariant mass mll, transverse momentum pT(ll), and ϕ∗ η. The ϕ∗ η observable, ... -
Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s = 13 TeV
(2023) [Artigo de periódico]The first observation of the production of W ± W ± bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an ... -
Observation of the rare decay of the η meson to four muons
(2023) [Artigo de periódico]A search for the rare η → μ+ μ− μ+ μ− double-Dalitz decay is performed using a sample of proton-proton collisions, collected by the CMS experiment at the CERN LHC with high-rate muon triggers during 2017 and 2018 and ... -
Effects of the magnetic field penetration into the metal on the Brillouin flow in a crossed-field gap
(2022) [Artigo de periódico]In this paper, the relativistic Brillouin flow in a crossed-field gap is investigated. For this, the case of a planar magnetron is considered. In contrast to previous studies, it is assumed that the electron discharge ...