Results 211 to 220 of about 1,053,086 (266)
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Muscle & Nerve, 1993
AbstractFar‐field potentials are produced by neural generators located at a distance from the recording electrodes. These potentials were initially characterized incorrectly as being of positive polarity, widespread distribution, and constant latency; however, recent advances have clearly demonstrated that far‐field potentials may be either positive or
D, Dumitru, D L, Jewett
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AbstractFar‐field potentials are produced by neural generators located at a distance from the recording electrodes. These potentials were initially characterized incorrectly as being of positive polarity, widespread distribution, and constant latency; however, recent advances have clearly demonstrated that far‐field potentials may be either positive or
D, Dumitru, D L, Jewett
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On the Far Field in Obstacle Scattering
SIAM Journal on Applied Mathematics, 1999Far field identities for the scattering of time-harmonic acoustic waves from sound-soft and sound-hard obstacles are proven. Two applications of these identities for the inverse obstacle scattering problem are discussed: an alternate proof for the Fréchet differentiability of the far field pattern with respect to the boundary and a new method for the ...
Lassi Päivärinta, Rainer Kress 0001
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Metal nanolens transforming far-field into far-field
2009 11th International Conference on Transparent Optical Networks, 2009In this communication we present technical details of performance of recently proposed silver nanolens which transforms a far-field source into a far-field focus [P. Wrobel, J. Pniewski, T.J. Antosiewicz, T. Szoplik, “Focusing radially polarized light by concentrically corrugated silver film without a hole” Phys. Rev. Lett., in print (2009)].
Piotr Wrobel +3 more
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Nano Letters, 2007
Far-field optical lens resolution is fundamentally limited by diffraction, which typically is about half of the wavelength. This is due to the evanescent waves carrying small scale information from an object that fades away in the far field. A recently proposed superlens theory offers a new approach by surface excitation at the negative index medium ...
Zhaowei, Liu +7 more
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Far-field optical lens resolution is fundamentally limited by diffraction, which typically is about half of the wavelength. This is due to the evanescent waves carrying small scale information from an object that fades away in the far field. A recently proposed superlens theory offers a new approach by surface excitation at the negative index medium ...
Zhaowei, Liu +7 more
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Far‐field potentials in muscle
Muscle & Nerve, 1991AbstractFar‐field potentials have been predicted by computer simulations as well as demonstrated in both animals and humans with respect to the peripheral and central nervous systems. Computer simulations have also predicted far‐field potentials originating at the termination of muscle tissue.
D, Dumitru, J C, King
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2015 Conference on Microwave Techniques (COMITE), 2015
The design of completely rebuilt antenna far-field range is described. The results of new measurement campaign are given for various cases. The paper analyzes briefly electromagnetic wave propagation over irregular terrain by physical optics approximation of vector problem using an enhanced analysis.
Schejbal Vladimír +4 more
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The design of completely rebuilt antenna far-field range is described. The results of new measurement campaign are given for various cases. The paper analyzes briefly electromagnetic wave propagation over irregular terrain by physical optics approximation of vector problem using an enhanced analysis.
Schejbal Vladimír +4 more
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Superresolution in far-field imaging
Optics Letters, 2000We demonstrate the feasibility of achieving superresolved images by using Fourier-plane phase masks and image multiplication, which together create effective point-spread functions that are not positive definite and therefore cannot be created by any single Fourier plane mask in a linear system.
Leiserson, I. +2 more
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Far field of polarization gratings
Optics Letters, 1999In a recent Letter [Opt. Lett. 24, 584 (1999)], Gori analyzed polarization gratings and proposed using them as a tool to measure Stokes parameters. Most of his analysis dealt with the near field, but practical exploitation of his approach relies on the far field.
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2007
In asking you, the reader, to metaphorically Step into “Heidegger’s Shoes” I am suggesting that the provisional “truth” of the equipmentality of this text be allowed to fall away to reveal an other-place. The interpretation of the text becomes yours. The collective action of both I, as author, and you, as reader, merely presents the start of a process ...
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In asking you, the reader, to metaphorically Step into “Heidegger’s Shoes” I am suggesting that the provisional “truth” of the equipmentality of this text be allowed to fall away to reveal an other-place. The interpretation of the text becomes yours. The collective action of both I, as author, and you, as reader, merely presents the start of a process ...
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Tolerance on defocus precisely locates the far field (exactly where is that far field anyway?)
Applied Optics, 2002The Fraunhofer criterion defines the location of the boundary between the Fresnel and the Fraunhofer diffraction regions and thus determines the location of that region commonly referred to as the far field. The Fraunhofer criterion is usually given as an axial distance much greater than some amount relative to the maximum dimension of the aperture. By
Harvey, James E. +2 more
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