Results 61 to 70 of about 533 (174)

Photorefractive reservoir computing

Optics Letters
Reservoir computing (RC) is a machine learning (ML) framework that has gained attention in recent years as the interest in alternative computing paradigms has grown. RC allows the utilization of physical systems to solve ML tasks. We demonstrate the use of the nonlinear photorefractive reservoir computer and perform tasks requiring both nonlinearity ...
Alveteg, Sebastian, Sciamanna, Marc, Fuerbach, Alex, Wolfersberger, Delphine   +3 more
openaire   +3 more sources

The Performance of Spot Photoscreener in 6 to 10 Weeks Infants in China: A Cross‐Sectional Study

Journal of Ophthalmology, Volume 2024, Issue 1, 2024.
Purpose. To compare the refractive errors measured by the Spot photoscreener (with or without cycloplegia) to cycloplegic retinoscopy in 6‐ to 10‐week‐old infants. Materials and Methods. 101 right eyes from 101 healthy infants aged 6 to 10 weeks were recruited for this cross‐sectional observational study.
Yaoling Li, Jing Li, Huiyu Wang, Mingyang Du, Lirong Wei, Teng Su, Gang Ding, Xuehan Qian, Ning Hua, In S. Contreras   +9 more
wiley   +1 more source

Accommodation and pupil responses to random-dot stereograms

Journal of Optometry, 2016
We investigated the dynamics of accommodative and pupillary responses to random-dot stereograms presented in crossed and uncrossed disparity in six visually normal young adult subjects (mean age = 25.8 ± 3.1 years).
Rajaraman Suryakumar, Robert Allison
doaj   +1 more source

Photorefraction in Polymers [PDF]

علوم و تکنولوژی پلیمر, 1996
H. Khoshsima, H. Tajalli, A. A. Entezami
doaj   +1 more source

Improvement of the photorefractive response in bismuth and magnesium co-doped lithium niobate crystals via oxygen-vacancy modulation through controlled redox annealing

Frontiers in Physics
In this study, bismuth (Bi) and magnesium (Mg) co-doped lithium niobate crystals (LN:Bi,Mg6.0) with a rapid photorefractive (PR) response were subjected to annealing treatments in oxygen and various argon atmospheres to modulate their oxidation-reduction
Shuolin Wang, Weiwei Wang, Yuqi Zhang, Youyou Hu, Dahuai Zheng, Hongde Liu, Yongfa Kong   +6 more
doaj   +1 more source

The photorefractive characteristics of bismuth-oxide doped lithium niobate crystals

AIP Advances, 2015
Bismuth-doped lithium niobate (LN:Bi) crystals were grown by Czochralski method and their optical damage resistance, photorefraction, absorption spectra, and defect energy levels were investigated.
Dahuai Zheng, Yongfa Kong, Shiguo Liu, Jiaying Yao, Ling Zhang, Shaolin Chen, Jingjun Xu   +6 more
doaj   +1 more source

Comparative Feature-Guided Regression Network with a Model-Eye Pretrained Model for Online Refractive Error Screening

Future Internet
With the development of the internet, the incidence of myopia is showing a trend towards younger ages, making routine vision screening increasingly essential.
Jiayi Wang, Tianyou Zheng, Yang Zhang, Tianli Zheng, Weiwei Fu   +4 more
doaj   +1 more source

Can the Bruckner test be used as a rapid screening test to detect significant refractive errors in children?

Indian Journal of Ophthalmology, 2007
Purpose: To assess the suitability of Brückner test as a screening test to detect significant refractive errors in children. Materials and Methods: A pediatric ophthalmologist prospectively observed the size and location of pupillary crescent ...
Kothari Mihir
doaj  

Image Analysis of Eccentric Photorefraction

Acta Polytechnica, 2004
This article deals with image and data analysis of the recorded video-sequences of strabistic infants. It describes a unique noninvasive measuring system based on two measuring methods (position of I.
J. Dušek, M. Dostálek
doaj  

First- and Second-Order Raman Scattering and Photorefraction in Nonlinear Optical Crystal LiNbO₃:Y³⁺(0.46 wt%)

Physics
It is found that the speckle structure of the photoinduced light scattering indicatrix of the LiNbO3:Y3+(0.46 wt%) crystal and its behavior with the time of crystal irradiation with a laser undergo an atypical behavior caused by the features of the ...
Nikolay V. Sidorov, Mikhail N. Palatnikov, Alexander Y. Pyatyshev, Alexander V. Skrabatun   +3 more
doaj   +1 more source