Results 41 to 50 of about 1,252,380 (279)

QUADRATURE COMPONENTS FORMING METHOD FOR HOMODYNE ACOUSTO-OPTIC SPECTRUM ANALYZER

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. Among acousto-optic spectrum analyzers with spatial integration, schemes based on optical interferometers provide the largest dynamic range. Nevertheless, they form the signal amplitude spectrum on a certain spatial carrier.
L. A. Aronov, V. N. Ushakov
doaj   +1 more source

Automatic Spatial Filtering by Combining Wavelet-Transform Modal Maxima and Mathematical Morphology in Digital Holographic Microscopy

open access: yesPhotonics, 2023
Digital holographic microscopy has significant advantages over traditional 3D measurements. In order to obtain a reconstructed image of superior quality, the zero-order-term spectrum and the −1 term spectrum must be eliminated during the digital ...
Hu Xiong, Dawei Zhang
doaj   +1 more source

Generating Spatial Spectrum with Metasurfaces

open access: yes, 2017
Fourier optics, the principle of using Fourier Transformation to understand the functionalities of optical elements, lies at the heart of modern optics, and has been widely applied to optical information processing, imaging, holography etc. While a simple thin lens is capable of resolving Fourier components of an arbitrary optical wavefront, its ...
Liu, Wenwei   +7 more
openaire   +2 more sources

Organoids in pediatric cancer research

open access: yesFEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Radio direction finding system based on spatial spectrum estimation

open access: yesDianxin kexue, 2017
The direction finding technology based on spatial spectrum estimation is widely used due to its’ ultra-high resolution,high sensitivity,high accuracy and plays a leading role in radio management.Based on the theoretical study of spatial spectrum ...
Xubin CHEN, Peiming REN, Huiling DAI
doaj   +2 more sources

Performance of wind turbines in a turbulent atmosphere [PDF]

open access: yes, 1981
The effect of atmospheric turbulence on the power fluctuations of large wind turbines was studied. The significance of spatial non-uniformities of the wind is emphasized.
Sullivan, J. P., Sundar, R. M.
core   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

open access: yesFEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

Relics of spatial curvature in the primordial non-gaussianity

open access: yes, 2009
We study signatures in the Cosmic Microwave Background (CMB) induced by the presence of strong spatial curvature prior to the epoch of inflation which generated our present universe.
Clunan, Tim, Seery, David
core   +1 more source

Spatial Contrast Sensitivity in Adolescents with Autism Spectrum Disorders [PDF]

open access: yesJournal of Autism and Developmental Disorders, 2010
Adolescents with autism spectrum disorders (ASD) and typically developing (TD) controls underwent a rigorous psychophysical assessment that measured contrast sensitivity to seven spatial frequencies (0.5-20 cycles/degree). A contrast sensitivity function (CSF) was then fitted for each participant, from which four measures were obtained: visual acuity ...
Koh, H.C., Milne, E., Dobkins, K.
openaire   +3 more sources

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