Browsing Exact and Earth Sciences by Title
Now showing items 3781-3800 of 6198
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Os objetos de aprendizagem e o desenvolvimento das habilidades espaciais
(2013) [Journal article]Este artigo aborda o desenvolvimento das habilidades espaciais, como rotação mental, percepção espacial e visualização espacial, com a utilização de objetos digitais de aprendizagem, em alunos do Ensino Fundamental. Para ... -
Oblique Alfvén waves in a stellar wind environment with dust particles charged by inelastic collisions and by photoionization
(2022) [Journal article]The characteristics of Alfvén waves propagating in a direction oblique to the ambient magnetic field in a stellar wind environment are discussed. A kinetic formulation for a magnetized dusty plasma is adopted considering ... -
Obliquely propagating electromagnetic waves in magnetized kappa plasmas
(2016) [Journal article]Velocity distribution functions (VDFs) that exhibit a power-law dependence on the high-energy tail have been the subject of intense research by the plasma physics community. Such functions, known as kappa or superthermal ... -
A obra de Boltzmann em física
(2006) [Journal article]O objetivo do presente trabalho é proporcionar uma visão geral sobre a obra de Boltzmann em Física. Algumas de suas contribuições mais importantes são discutidas e contextualizadas. -
Observational constraints on the stellar recycled gas in active galactic nuclei feeding
(2024) [Journal article]Near-infrared long-slit spectroscopy has been used to study the stellar population (SP) of the low luminosity active galactic nuclei (AGNs) and matched analogues (LLAMA) sample. To perform the SP fits we have employed the ... -
Observational limits on companions to g29-38
(1994) [Journal article]Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has ... -
Observation of abnormal suppression of f0(980) production in p–Pb collisions at √s𝐍𝐍 = 5.02 TeV
(2024) [Journal article]The dependence of f0(980) production on the final-state charged-particle multiplicity in p–Pb collisions at √𝑠NN = 5.02 TeV is reported. The production of f0(980) is measured with the ALICE detector via the f0(980) → ... -
Observation of a multiplicity dependence in the pT-differential charm baryon-to-meson ratios in proton–proton collisions at √s = 13 TeV
(2022) [Journal article]The production of prompt D0, D+ s , and + c hadrons, and their ratios, D+ s /D0 and + c /D0, are measured in proton–proton collisions at √s = 13 TeV at midrapidity (|y| < 0.5) with the ALICE detector at the LHC. The ... -
Observation of a new excited beauty strange baryon decaying to Ξ−bπ+π−
(2021) [Journal article]The Ξ−bπ+π− invariant mass spectrum is investigated with an event sample of proton-proton collisions at √s=13 TeV, collected by the CMS experiment at the LHC in 2016–2018 and corresponding to an integrated luminosity of ... -
Observation of B0 s mesons and measurement of the B0 s /B+ yield ratio in PbPb collisions at √snn = 5.02 TeV
(2022) [Journal article]The B0 s and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity ... -
Observation of B0 → ψ(2S)K0Sπ+π− and B0s → ψ(2S)K0S decays
(2022) [Journal article]Using a data sample of s√=13TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103~fb−1, the B0s→ψ(2S)K0S and B0→ψ(2S)K0Sπ+π− decays are observed with ... -
Observation of collective inner-shell effects for protons backscattered from the Al(110) surface
(2005) [Journal article]The surface peak of 98-keV protons backscattered from a clean Al (110) surface has been studied in detail for three different scattering geometries. The corresponding energy-loss distributions are asymmetric due to the ... -
Observation of deterministic chaos in electrical discharges in gases
(1987) [Journal article]We report that dc-excited discharges in gases display current oscillations which develop into deterministically chaotic behavior. A period-doubling route to chaos characteristic of 1D maps is established for sealed discharges ... -
Observation of electroweak production of Wγ with two jets in proton-proton collisions at √s = 13 TeV
(2020) [Journal article]A first observation is presented for the electroweak production of a W boson, a photon, and two jets in proton-proton collisions. The W boson decays are selected by requiring one identified electron or muon and an imbalance ... -
Observation of electroweak W+W− pair production in association with two jets in proton-proton collisions at √s = 13 TeV
(2023) [Journal article]An observation is reported of the electroweak production of a W+W− pair in association with two jets, with both W bosons decaying leptonically. The data sample corresponds to an integrated luminosity of 138 fb−1 of ... -
Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √snn= 5.02 TeV
(2021) [Journal article]The first measurement of the dependence of γγ→μ+μ− production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions ... -
Observation of four top quark production in proton-proton collisions at √𝑠 = 13TeV
(2023) [Journal article]The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and ... -
Observation of Higgs boson decay to bottom quarks
(2018) [Journal article]The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z ... -
Observation of medium-induced modifications of jet fragmentation in Pb-Pb collisions at √sNN=5.02 TeV using isolated photon-tagged jets
(2018) [Journal article]Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a ... -
Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
(2020) [Journal article]The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding ...
