Results 261 to 270 of about 73,006 (300)
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Isotropic Hilbert transform by anisotropic spatial filtering
Applied Optics, 1986We propose a spatial filtering technique to obtain, by optical means, an isotropic Hilbert transform. The spatial filter is anisotropic. Experimental results are reported.
J, Ojeda-Castañeda, E, Jara
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From isotropic to anisotropic superconductors: A scaling approach
Physical Review Letters, 1992We present a new scaling approach which allows one to map results obtained for isotropic superconductors to anisotropic materials in a simple and direct way. The scaling rules are obtained on the level of Ginzburg-Landau-- or London--type equations and applied directly to the desired phenomenological quantity.
, Blatter, , Geshkenbein, , Larkin
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Graphene as a Tunable Anisotropic or Isotropic Plasmonic Metasurface
ACS Nano, 2016We demonstrate a tunable plasmonic metasurface by considering a graphene sheet subject to a periodically patterned doping level. The unique optical properties of graphene result in electrically tunable plasmons that allow for extreme confinement of electromagnetic energy in the technologically significant regime of THz frequencies.
Huidobro, PA +3 more
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Isotropic versus anisotropic encoding of visual information
Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101), 2002Loss of information in images undergoing fine-to-coarse image transformations is analyzed by using an approach based on the theory of irreversible transformations. The method is applied to isotropic and anisotropic diffusion and an algorithm based on entropy variation is presented that extracts relevant features of the image and provides a method to ...
FERRARO M. +2 more
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The response of isotropic turbulence to isotropic and anisotropic forcing at the large scales
Physics of Fluids A: Fluid Dynamics, 1991The nonlinear interscale couplings in a turbulent flow are studied through direct numerical simulations of the response of isotropic turbulence to isotropic and anisotropic forcing applied at the large scales. Specifically, forcing is applied to the energy-containing wave-number range for about two eddy turnover times to fully developed isotropic ...
P. K. Yeung, James G. Brasseur
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Anisotropic-Isotropic Transition of Cages at the Glass Transition
Physical Review LettersCharacterizing the local structural evolution is an essential step in understanding the nature of glass transition. In this work, we probe the evolution of Voronoi cell geometry in simple glass models by simulations and colloid experiments, and find that the individual particle cages deform anisotropically in supercooled liquid and isotropically in ...
Huijun Zhang +3 more
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Isotropic and anisotropic turbulence in Clebsch variables
Chaos, Solitons & Fractals, 1995Abstract Three-dimensional turbulence of incompressible fluid is described by using Clebsch canonical variables. This reveals the families of new local integrals of motion so that there are additional cascade spectra besides the energy cascade. A weakly anisotropic spectrum of developed turbulence is shown to be as universal as isotropic Kolmogorov ...
Gregory Falkovich, Victor S. L'vov
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Borehole Wave Propagation In Isotropic And Anisotropic Media II: Isotropic Formation
1994In this paper we apply the 3-D finite difference method to simulate borehole wave propagations in an isotropic formation. The scheme is tested in a fluid-filled borehole surrounded by the homogeneous elastic formation. The finite difference synthetics results are in good agreement with the discrete wavenumber solutions for both monopole and dipole ...
Cheng, Ningya +2 more
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On the formulation of isotropic and anisotropic damage
1998Considerable effort has been devoted in recent years to the formulation of degradation and damage. A large portion of the models, however, still correspond to variations of the traditional ``(1-D)-type'' scalar damage formulation, while a smaller portion represents other kinds of isotropic or anisotropic degradation.
Carol, Ignacio +2 more
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