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Mostrando ítems 51-60 de 72
Artículo
Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays
(American Physical Society, 2016)
A wideband equivalent circuit is proposed for the accurate analysis of scattering from a set of stacked slit gratings illuminated by a plane wave with transverse magnetic or electric polarization that impinges normally or ...
Artículo
Combining Software-Defined Radio Learning Modules and Neural Networks for Teaching Communication Systems Courses †
(Multidisciplinary Digital Publishing Institute (MDPI), 2023)
The paradigm known as Cognitive Radio (CR) proposes a continuous sensing of the electromagnetic spectrum in order to dynamically modify transmission parameters, making intelligent use of the environment by taking advantage ...
Artículo
Microstrip circuit analog of a complex diffraction phenomenon
(American Institute of Physics, 2009)
This letter presents a methodology to reproduce at microwave frequencies the physical behavior of certain diffraction structures that have been investigated in the optics community. The methodology will be exemplified with ...
Artículo
Magnetic stabilization of fluidized beds: Effect of magnetic field orientation
(Elsevier, 2017)
Fluidized beds of granular materials can be stabilized by interparticle attractive forces which confer the expanded bed an elastic modulus that stabilizes it against flow perturbations. Stabilization in a structure of ...
Artículo
Correct denition of the Poynting vector in electrically and magnetically polarizable medium reveals that negative refraction is impossible: comment
(Optical Society of America, 2009)
It is shown that, when all macroscopic currents associated with the electric and magnetic polarizability are properly accounted for, the standard expression for the Poynting vector and the average work exerted by the ...
Artículo
Analytical model for the transmission of electromagnetic waves through arrays of slits in perfect conductors and lossy metal screens
(American Institute of Physics, 2011)
This paper presents a very simple analytical model for the analysis of the resonant transmission of microwaves or millimeter waves through periodically distributed slits in a thick metal screen. The model is based on ...
Ponencia
Un algoritmo de desentrelazado adaptativo con la repetición de imágenes basado en lógica difusa
(2009)
Esta comunicación presenta un interpolator temporal basado en lógica difusa que es utilizado para el desentrelazado de la señal de vídeo. El objetivo es que dicho interpolador sea capaz de aprovechar una caracterísctica ...
Artículo
Signal-to-noise ratio evaluation in resonant ring metamaterial lenses for MRI applications
(IOP Publishing Ltd., 2011)
In this paper, we present a method for the evaluation of the signalto- noise ratio in magnetic resonance imaging (MRI) coils loaded with resonant ring metamaterial lenses, in the presence of a conducting phantom resembling ...
Artículo
On the Excitation of Magnetic Current Surface Waves in Truncated Periodic Arrays of Slots Under Extraordinary Transmission Conditions
(Institute of Electrical and Electronics Engineers, 2020)
In this paper, we explore the excitation of magnetic current surface waves in truncated periodic arrays of slots in a conducting screen. A specialized Method of Moments (MoM) implementation is presented, which makes it ...
Artículo
Vibration-induced dynamical weakening of pyroclastic flows: Insights from rotating drum experiments
(Wiley-Blackwell, 2015)
Pyroclastic flows are characterized by their high mobility, which is often attributed to gas fluidization of the usually fine and/or low-density particles. However, the physical mechanism that might drive sustained ...