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Mostrando ítems 1-10 de 260
Artículo
Two-dimensional discrete solitons in rotating lattices
(2007)
We introduce a two-dimensional discrete nonlinear Schrödinger (DNLS) equation with self-attractive cubic nonlinearity in a rotating reference frame. The model applies to a Bose-Einstein condensate stirred by a rotating ...
Artículo
Microestructura y propiedades mecánicas de conductores protónicos de alta temperatura crecidos por fusión de zona flotante
(2004)
Se han estudiado conductores protónicos de alta temperatura (CPAT) fabricados por fusión de zona flotante asistida por láser (SrCe0.9Y0.1O3-δ , SrCe0.8Y0.2O3-δ , SrZr0.9Y0.1O3-δ , SrZr0.8Y0.2O3-δ , Sr3 (Ca1.18Nb1.82)O9-δ ...
Artículo
Influence of spacer layer morphology on the exchange-bias properties of reactively sputtered Co ∕ Ag multilayers
(American Physical Society, 2007-09-25)
We have studied the magnetic properties of [Ag(tAg)/Co(1.2nm)]60 multilayers grown in an oxygen atmosphere. Partial oxidation of the Co layers results in the appearance of tAg dependent exchange-bias properties. A strong ...
Artículo
Secuencia cronoestratigráfica del Pleistoceno Superior en Sierra Morena: la cueva de La Sima (Constantina, Sevilla)
(Sociedad Geológica de España, 2002)
La Sima of Constantina, located at the northermost part of Seville province, is a karstic cave with a thick terrigenous and chemical (f/owstone) record. These sedimentary formations are representative of the Late Quaternary ...
Artículo
Optical refractive index and static permittivity of mixed Zr–Si oxide thin films prepared by ion beam induced CVD
(Elsevier, 2007)
Mixed oxides ZrxSi1−xO2 (0bxb1) thin films have been prepared at room temperature by decomposition of (CH3CH2O)3SiH and Zr[OC (CH3)3]4 volatile precursors induced by mixtures of O2 + and Ar+ ions. The films were flat and ...
Artículo
Resonances in the dynamics of f 4 kinks perturbed by ac forces
(2000)
We study the dynamics of f 4 kinks perturbed by an ac force, both with and without damping. We address this issue by using a collective coordinate theory, which allows us to reduce the problem to the dynamics of the kink ...
Artículo
Self-cleaning in an estuarine area formerly affected by 226Ra anthropogenic enhancements: numerical simulations
(Elsevier, 2005)
A numerical model of the Odiel–Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from 226Ra measurements in water and sediments collected in the period 1999–2002, after direct ...
Artículo
Isotopic fractionation during leaching of impure carbonates and their effect on uranium series dating
(Elsevier, 2005)
Experiments were designed to evaluate the behaviour of detritus during the leaching of impure carbonates by applying the U-Th isochron technique. We used one natural detritus and a pure, well-dated CaCO3 , alone and in ...
Artículo
Stability analysis of conducting jets under ac radial electric fields for arbitrary viscosity
(AIP Publishing, 2003-02)
A temporal linear modal stability analysis is presented for conducting viscous liquid jets flowing with nonzero velocity relative to an ambient gas and subjected to an ac radial electric field. Parametric resonance between ...
Artículo
Modelling the flux of radionuclides from the Rhone River into the Mediterranean Sea
(EDP Sciences, 2005)
A numerical model has been developed to simulate the input of radionuclides into the Mediterranean Sea through the Rhone River plume. The model is fully 3D. It solves the hydrodynamic equations, which include baroclinic ...