Navegação Ciências Exatas e da Terra por Título
Resultados 5700-5719 de 5964
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Two-component Gaussian core model : strong-coupling limit, Bjerrum pairs, and gas-liquid phase transition
(2018) [Artigo de periódico]In the present work, we investigate a gas-liquid transition in a two-component Gaussian core model, where particles of the same species repel and those of different species attract. Unlike a similar transition in a ... -
Two-dimensional ising spin glasses with nonzero ordering temperatures
(1996) [Artigo de periódico]We demonstrate numerically that, for Ising spins on square lattices with ferromagnetic second neighbor interactions and random near neighbor interactions, two-dimensional Ising spin glass order with a nonzero freezing ... -
Two dimensional kinetic analysis of electrostatic harmonic plasma waves
(2016) [Artigo de periódico]Electrostatic harmonic Langmuir waves are virtual modes excited in weakly turbulent plasmas, first observed in early laboratory beam-plasma experiments as well as in rocket-borne active experiments in space. However, their ... -
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics
(2012) [Artigo de periódico]We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the ... -
Two-dimensional time evolution of beam-plasma instability in the presence of binary collisions
(2016) [Artigo de periódico]Energetic electrons produced during solar flares are known to be responsible for generating solar type III radio bursts. The radio emission is a byproduct of Langmuir wave generation via beam-plasma interaction and nonlinear ... -
Two interacting fermions in a one-dimensional harmonic trap : matching the Bethe ansatz and variational approaches
(2012) [Artigo de periódico]In this work, combining the Bethe ansatz approach with the variational principle, we calculate the ground-state energy of the relative motion of a system of two fermions with spin up and spin down interacting via a ... -
Two New Cynodonts (Therapsida) from the Middle-Early Late Triassic of Brazil and Comments on South American Probainognathians
(2016) [Artigo de periódico]We describe two new cynodonts from the early Late Triassic of southern Brazil. One taxon, Bonacynodon schultzi gen. et sp. nov., comes from the lower Carnian Dinodontosaurus AZ, being correlated with the faunal association ... -
Two new pulsating low-mass pre-white dwarfs or SX Phoenicis stars?
(2016) [Artigo de periódico]Context. The discovery of pulsations in low-mass stars opens an opportunity to probe their interiors and determine their evolution by employing the tools of asteroseismology. Aims. We aim to analyse high-speed photometry ... -
Two-particle azimuthal correlations in γp interactions using pPb collisions at √sNN = 8.16 TeV
(2023) [Artigo de periódico]The first measurements of the Fourier coefficients (Vn) of the azimuthal distributions of charged hadrons emitted from photon-proton (γp) interactions are presented. The data are extracted from 68.8 nb−1 of ultra-peripheral ... -
Two-particle differential transverse momentum and number density correlations in p−Pb collisions at 5.02 TeV and Pb-Pb collisions at 2.76 TeV at the CERN Large Hadron Collider
(2019) [Artigo de periódico]We present measurements of two-particle differential number correlation functionsR2and transverse momen-tum correlation functionsP2, obtained fromp-Pb collisions at 5.02 TeV and Pb-Pb collisions at 2.76 TeV. Theresults are ... -
Two-particle transverse momentum correlations in pp and p-Pb collisions at energies available at the CERN Large Hadron Collider
(2023) [Artigo de periódico]Two-particle transverse momentum differential correlators, recently measured in Pb-Pb collisions at energies available at the CERN Large Hadron Collider (LHC), provide an additional tool to gain insights into particle ... -
Two reddened globular cluster projected close to the galactic center : Palomar 6 and Djorgovski 1
(1995) [Artigo de periódico]We present NTT V,I observations of Palomar 6 and Djorgovski 1, two obscured loose clusters in crowded fields. We derive a reddening of E(B - V) = 1.33 ± 0.10, a distance dʘ ≈ 8.9 kpc, and a metallicity of [Fe/H] ≈ -0.4 for ... -
Two rubber balloons : phase diagram of air transfer
(2004) [Artigo de periódico]Two identical rubber balloons are partially inflated with air (to different extent) and connected by a hose with a valve. It is found that depending on initial balloon volumes, when the valve is opened the air will flow ... -
Two scenarios for superconductivity in CeRh2As2
(2021) [Artigo de periódico]CeRh2As2, a nonsymmorphic heavy fermion material, was recently reported to host a remarkable temperature versus z-axis magnetic-field phase diagram with two superconducting phases. In this material, the two inequivalent ... -
Two serendipitous low-mass lmc dusters discovered with hst
(1998) [Artigo de periódico]We present V and I photometry of two open clusters in the LMC down to V~26. The clusters were imaged with the Wide Field and Planetary Camera 2 (WFPC2) on board the Hubble Space Telescope (HST), as part of the Medium Deep ... -
A two-sided method for nonlinear equations with cubic convergence
(1989) [Artigo de periódico]A two-sided method for finding a zero of 'a real-valued function on a given interval is presented and its convergence features are analysed, This method combines ih a simple way the well known schemes of Newton Raphson and ... -
Two-site Bose-Hubbard model with nonlinear tunneling : classical and quantum analysis
(2017) [Artigo de periódico]The extended Bose-Hubbard model for a double-well potential with atom-pair tunneling is studied. Starting with a classical analysis we determine the existence of three quantum phases: self-trapping, phase-locking, and ... -
Two time scales and violation of the fluctuation-dissipation theorem in a finite dimensional model for structural glasses
(2000) [Artigo de periódico]We study the breakdown of fluctuation-dissipation relations between time-dependent density-density correlations and associated responses following a quench in the chemical potential in the frustrated Ising lattice gas. The ... -
Two universality classes of the Ziff-Gulari-Barshad model with CO desorption via time-dependent Monte Carlo simulations
(2018) [Artigo de periódico]We study the behavior of the phase transitions of the Ziff-Gullari-Barshad (ZGB) model when CO molecules are adsorbed on a catalytic surface with a rate y and desorbed from the surface with a rate k. We employ largescale ...