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Mostrando ítems 101-110 de 126
Artículo
Wetting and interfacial order at nematic free surfaces
(IOP Publishing Ltd., 1996-07-20)
We apply a density-functional theory to the free surface of a model liquid crystal, to investigate the orientational order at the nematic free surface of systems exhibiting orientational wetting at the isotropic liquid-vapour ...
Artículo
CCD Strömgren photometry of young reddened clusters
(IOP Publishing Ltd., 1997-02)
The capabilities of CCD uvby photometry for the study of reddened young clusters are investigated. Observations of four fields in the direction of the clusters Basel 1, Berkeley 86, NGC 6704, and NGC 6756, with a total of ...
Artículo
Expansion for the moments of a nonlinear stochastic model
(American Physical Society, 1996-10-14)
We present a procedure to systematically evaluate all the moments of the Fokker-Planck equation by expanding them in a power series in a given function of t. The expansion coefficients are easily determined in terms of ...
Artículo
On the validity of linear hydrodynamics for low-density granular flows described by the Boltzmann equation
(European Physical Society, 1999)
The direct Monte Carlo simulation method is used to check the validity of the hydrodynamic description of a low-density granular flow in the linear region about the homogeneous cooling state. Good agreement is found between ...
Artículo
Kinetic model for the hard-sphere fluid and solid
(American Physical Society, 1998)
The revised Enskog kinetic theory (RET) for a system of hard spheres provides an exceptionally broad description of mesoscopic and macroscopic dynamics, applicable for both fluid and solid phases, long and short wavelengths, ...
Artículo
External-field effects on molecular electronic transitions in charge-transfer systems
(American Physical Society, 1998)
We investigate strong-external-field effects on optical transitions between electronic states of charge-transfer systems in condensed media. We will use as a model a two-level system coupled to a dissipative medium driven ...
Artículo
Normal solutions for master-equations with time-dependent transition rates - application to heating processes
(American Physical Society, 1993)
The long-time limit of the solutions of a master equation with time-dependent transition rates is analyzed, and the existence of a special (normal) solution, that all the other solutions tend to approach, is shown under ...
Tesis Doctoral
Tesis Doctoral
Análisis, construcción y verificación experimental de un sistema de radiofrecuencia para la detección no destructiva de fluctuaciones de fase en haces iónicos pulsados emergentes de un acelerador electrostático
(1999-05)
Esta tesis doctoral abarca el análisis previo, los fundamentos de proyecto, los procedimientos para la construcción y la verificación de funcionamiento de un sistema basado en tecnologías de radiofrecuencia, cuya aplicación ...
Artículo
Multibody neutrino exchange in a neutron star: neutrino sea and border effects
(Elsevier, 1997)
The interaction due to the exchange of massless neutrinos between neutrons is a long-range force. Border effects on this multibody exchange inside a dense core are studied and computed analytically in dimensions. We ...