Results 21 to 30 of about 1,974,870 (293)

The Effect of Spatial Mode Distribution on Coupling Efficiency of Single-Mode Fiber: Theoretical Analysis and Experimental Verification

open access: yesApplied Sciences, 2019
In this study, Zernike polynomials and optical fiber field theory are applied to build a mathematical model of coupling efficiency (CE) and spatial mode of aberrations.
Yongkai Liu   +6 more
doaj   +1 more source

Excitation of vibrational soft modes in disordered systems using active oscillation [PDF]

open access: yes, 2016
We propose a new method to characterize the spatial distribution of particles' vibrations in solids with much lower computational costs compared to the usual normal mode analysis.
72167   +3 more
core   +2 more sources

Spatial frequency equalization does not prevent spatial–numerical associations [PDF]

open access: yesPsychonomic Bulletin & Review, 2022
AbstractThere is an intense debate surrounding the origin of spatial–numerical associations (SNAs), according to which small numbers are mapped onto the left side of the space and large numbers onto the right. Despite evidence suggesting that SNAs would emerge as an innate predisposition to map numerical information onto a left-to-right spatially ...
Adriano, A, Rinaldi, L, Girelli, L
openaire   +4 more sources

Imaging dielectric relaxation in nanostructured polymers by frequency modulation electrostatic force microscopy [PDF]

open access: yes, 2010
We have developed a method for imaging the temperature-frequency dependence of the dynamics of nanostructured polymer films with spatial resolution. This method provides images with dielectric compositional contrast well decoupled from topography.
de Knijff, P.   +11 more
core   +4 more sources

Numerical Method for Analysis of Waveguide Modes in Planar Gradient Waveguides

open access: yesMedžiagotyra, 2014
This paper presents a numerical method developed to find propagation constants of planar waveguide localized modes. The method is based on both the Fourier transform application and the wave equation solution in a frequency domain.
Volodymyr Mykhailovych FITIO   +2 more
doaj   +1 more source

Photonic Bloch oscillations of correlated particles [PDF]

open access: yes, 2011
A photonic realization of Bloch oscillations (BOs) of two correlated electrons that move on a one-dimensional periodic lattice, based on spatial light transport in a square waveguide array with a defect line, is theoretically proposed.
Longhi, Stefano
core   +1 more source

Resolution Enhancement in Extreme Ultraviolet Ptychography Using a Refined Illumination Probe and Small-Etendue Source

open access: yesPhotonics
Extreme ultraviolet (EUV) ptychography is a promising actinic mask metrology technique capable of providing aberration-free images with subwavelength resolution.
Seungchan Moon   +3 more
doaj   +1 more source

Wave-unlocking transition in resonantly coupled complex Ginzburg-Landau equations [PDF]

open access: yes, 1996
We study the effect of spatial frequency-forcing on standing-wave solutions of coupled complex Ginzburg-Landau equations. The model considered describes several situations of nonlinear counterpropagating waves and also of the dynamics of polarized light ...
Amengual, A.   +3 more
core   +1 more source

Attention to local and global levels of hierarchical Navon figures affects rapid scene categorization

open access: yesFrontiers in Psychology, 2014
In four experiments, we investigated how attention to local and global levels of hierarchical Navon figures affected the selection of diagnostic spatial scale information used in scene categorization.
John eBrand   +2 more
doaj   +1 more source

Low spatial frequency bias in schizophrenia is not face specific: When the integration of coarse and fine information fails

open access: yesFrontiers in Psychology, 2013
Studies have shown that patients with schizophrenia exhibit visual processing impairments, particularly regarding the processing of spatial frequencies.
Vincent eLaprevote   +9 more
doaj   +1 more source

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