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Mostrando ítems 81-90 de 94
Artículo
Soliton dynamics in optical fibers using the generalized traveling-wave method
(American Physical Society, 2016-04-21)
The generalized traveling wave method (GTWM) is applied to the nonlinear Schrödinger (NLS) equation with general perturbations in order to obtain the equations of motion for an ansatz with six collective coordinates, namely ...
Artículo
An XPS and ellipsometry study of Cr–O–Al mixed oxides grown by reactive magnetron sputtering
(ScienceDirect, 2011-12-15)
Cr–O–Al thin film mixed oxides grown on Si (100) substrates by reactive magnetron sputtering using different target compositions from 90% Cr (10% Al) to 10% Cr (90% Al) and oxygen fluxes in the range from 0 to 15 sccm have ...
Artículo
Design of Broadband Aperture-Coupled Stacked Microstrip Antennas Using Second-Order Filter Theory
(IEEE, 2022-07)
In this article, the authors propose a lumped circuit methodology for the design of broadband stacked microstrip patch antennas fed through an aperture. First, an equivalent circuit (EC) is introduced for the antenna. The ...
Artículo
Comparative depth-profiling analysis of nanometer-metal multilayers by ion-probing techniques
(ScienceDirect, 2009-04)
We examine here the depth resolution (interface width) in elemental analysis and depth profiling of complex layer systems of three ion-probing techniques, each of which has pros and cons: • Rutherford backscattering ...
Artículo
Vaccination compartmental epidemiological models for the delta and omicron SARS-CoV-2 variants
(Elsevier, 2024-01)
We explore the inclusion of vaccination in compartmental epidemiological models concerning the delta and omicron variants of the SARS-CoV-2 virus that caused the COVID-19 pandemic. We expand on our earlier compartmental-model ...
Artículo
Discrete breathers in Klein–Gordon lattices. A deflation-based approach
(American Institute of Physics, 2023-11-21)
Deflation is an efficient numerical technique for identifying new branches of steady state solutions to nonlinear partial differential equations. Here, we demonstrate how to extend deflation to discover new periodic orbits ...
Artículo
Standing and traveling waves in a model of periodically modulated one-dimensional waveguide arrays
(American Physical Society, 2023-08)
In the present work we study coherent structures in a one-dimensional discrete nonlinear Schrödinger lattice in which the coupling between waveguides is periodically modulated. Numerical experiments with single-site initial ...
Artículo
Interactions of solitons with a Gaussian barrier : splitting and recombination in quasi-1D and 3D
(2013)
The interaction of matter-wave solitons with a potential barrier is a fundamentally important problem, and the splitting and subsequent recombination of the soliton by the barrier is the essence of soliton matter-wave ...
Artículo
Evaluation of the optoelectronic properties and corrosion behavior of Al2O3-doped ZnO films prepared by dc pulsed magnetron sputtering
(IOPScience, 2014)
he main requirements for transparent conducting oxide (TCO) films acting as electrodes are a high transmission rate in the visible spectral region and low resistivity. However, in many cases, tolerance to temperature and ...
Artículo
Existence, stability and spatio-temporal dynamics of time-quasiperiodic solutions on a finite background in discrete nonlinear Schrödinger models
(Elsevier, 2024-07)
In the present work we explore the potential of models of the discrete nonlinear Schrödinger (DNLS) type to support spatially localized and temporally quasiperiodic solutions on top of a finite background. Such solutions ...