Results 51 to 60 of about 607,924 (298)

X‐Ray Computed Tomography Quantifies Primary Phases and Reveals Crack Morphology in High‐Cycle Fatigue of Aluminum Alloy EN AW‐2618A

open access: yesAdvanced Engineering Materials, EarlyView.
Primary phases and a fatigue crack are studied in a forged blank of an aluminum alloy using synchrotron and laboratory X‐ray computed tomography. To image the crack, the fatigue test is interrupted, and a static tensile load is applied to open the crack.
Jakob Schröder   +6 more
wiley   +1 more source

Impacto da análise do "wavefront" na refratometria de pacientes com ceratocone Impact of the wavefront analysis in refraction of keratoconus patients

open access: yesRevista Brasileira de Oftalmologia, 2010
OBJETIVO: Verificar se a aberrometria ocular total (análise da frente de onda ou wavefront) possibilita a melhora na acuidade visual corrigida (AVc) com lentes esfero-cilíndricas, obtida com a refratometria manifesta em casos de ceratocone com algum grau
Renato Ambrósio Junior   +4 more
doaj   +1 more source

Interrelation of the eyeball morphometric parameters in girls with myopia

open access: yesИзвестия высших учебных заведений. Поволжский регион: Медицинские науки, 2021
Background. The features and relationships of morphometric indicators of visual organs in girls with myopia were determined. Materials and methods. The study included 148 girls (296 eyes) from 12 to 15 years old with myopia, the control group consisted
Yu.S. Levchenko
doaj   +1 more source

Evaluation of postoperative refractive error correction after cataract surgery.

open access: yesPLoS ONE, 2021
Suboptimal cataract surgery outcomes remain a challenge in most developing countries. In Ghana, about 2 million people have been reported to be blind due to cataract with about 20% new cases being recorded yearly.
Ellen Konadu Antwi-Adjei   +5 more
doaj   +1 more source

Ocular higher-order aberrations and axial eye growth in young Hong Kong children

open access: yesScientific Reports, 2018
This retrospective longitudinal analysis aimed to investigate the association between ocular higher-order aberrations (HOAs) and axial eye growth in Hong Kong children.
J. K. Lau   +4 more
semanticscholar   +1 more source

W‐Based Thin Film Metallic Glasses Doped with Ni, Zr, and B for Industrial Applications

open access: yesAdvanced Engineering Materials, EarlyView.
This work is the first to deal with a comprehensive comparison of two metallic glass systems, W–Zr–B and W–Ni–B, in terms of their suitability for specific industrial applications. Their mechanical and tribological properties are compared and discussed in combination with structural homogeneity on different types of technically relevant substrates and ...
Zbynek Studeny   +5 more
wiley   +1 more source

Comparison of cycloplegic refraction in children with different iris colour categories. A cross- sectional survey

open access: yesJournal of the Pakistan Medical Association
Objective: To compare the cycloplegic refraction in children with different iris colour categories and age groups. Methods: The cross-sectional study was conducted from December 2022 to June 2023 at the Eye Clinic of Sehat Medical Complex, Hanjarwal ...
Aisha Arooj   +2 more
doaj   +1 more source

Prevalence of Ocular Disorders in Learning Disabled Children and Their Functional Visual Performance Before and After Providing Spectacle Correction

open access: yesDelhi Journal of Ophthalmology, 2017
Aim: To determine the prevalence of ocular disorders and the functional visual performance in learning disabled children, before and after providing spectacle correction.
Parikshit Gogate   +3 more
doaj   +1 more source

Sol–Gel Synthesis of Ca2.5Ag0.3Sm0.2Co4O9 Semiconducting Materials for Thermoelectric Applications in Aerospace Systems

open access: yesAdvanced Engineering Materials, EarlyView.
Ca2.5Ag0.3Sm0.2Co4O9 semiconductor materials are synthesized and produced in this study using the sol–gel and cold pressing techniques for thermoelectric generator applications. As template samples are added, the Seebeck coefficient and power factor values rise, peaking at 800 °C for Ca2.5Ag0.3Sm0.2Co4O9 at 274.47 μV K−1 and 0.58 mW mK−2, respectively.
Enes Kilinc   +4 more
wiley   +1 more source

The Impact of Changes in Corneal Back Surface Astigmatism on the Residual Astigmatic Refractive Error following Routine Uncomplicated Phacoemulsification

open access: yesJournal of Ophthalmology, 2020
Purpose. To determine the significance of any association between intersessional changes in ocular residual astigmatism (RA) and astigmatism at corneal front (FSA) and back (BSA) surfaces following uneventful routine phacoemulsification.
Larysa Tutchenko   +4 more
doaj   +1 more source

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