Results 101 to 110 of about 342,349 (349)

Prevalence of refractive errors in children in India: a systematic review [PDF]

open access: yes, 2018
Uncorrected refractive error is an avoidable cause of visual impairment which affects children in India. The objective of this review is to estimate the prevalence of refractive errors in children ≤ 15 years of age.
Aditi Modi   +48 more
core   +1 more source

A Gym for Cells—Direct Laser Writing of Magnetic Multilayered Micro Actuators for Mechanical Stimulation of Cells

open access: yesAdvanced Functional Materials, EarlyView.
Surface‐attached multilayer micromagnet systems are fabricated by two‐photon crosslinking. The pillar‐shaped micro actuators consist of a soft and flexible surface‐attached cell‐repellent hydrogel layer at the bottom, acting as a hinge and a cell‐adhesive hydrophobic polymer filled with magnetic nanoparticles.
Nicolas Geid   +5 more
wiley   +1 more source

Application of Fresnel diffraction to nondestructive measurement of the refractive index profiles of optical fibers [PDF]

open access: yes, 2006
This paper has been withdrawn by the author due to a some errors in figures 2 and 3.
arxiv   +1 more source

Shear‐Induced Nematic Alignment in Polysulfone Melts

open access: yesAdvanced Functional Materials, EarlyView.
Shear‐induced alignment is investigated by means of rheology and birefringence on an amorphous linear polysulfone melt. The absence of crystallization makes PSU particularly enabling to investigate temperature effects on the shear‐alignment of linear polymers, unveiling the role of chain relaxation times and possible enthalpic contributions.
Sara Daryoush   +3 more
wiley   +1 more source

Visual Profile of Children who Passed or Failed the UK School Vision Screening Protocol

open access: yesBritish and Irish Orthoptic Journal, 2019
Background: We applied the National Screening Committee vision screening protocol [pass criterion monocular acuity ≤ 0.2 LogMAR in both eyes(BE)] to children four to five years old to investigate the visual profile of children who passed/failed. Previous
Sara McCullough, Kathryn Saunders
doaj   +1 more source

Reversion scheme for droplet parameters with rainbow refractometry based on Debye theory [PDF]

open access: yes, 2011
This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
3rd Micro and Nano Flows Conference (MNF2011)   +4 more
core  

Imaging point sources in heterogeneous environments

open access: yes, 2019
Imaging point sources in heterogeneous environments from boundary or far-field measurements has been extensively studied in the past. In most existing results, the environment, represented by the refractive index function in the model equation, is ...
Ren, Kui, Zhong, Yimin
core   +1 more source

Off‐Stoichiometry Engineering of the Electrical and Optical Properties of SrNbO3 Using Oxide Molecular Beam Epitaxy

open access: yesAdvanced Functional Materials, EarlyView.
The plasma edge of transparent conducting oxide SrNbO3 shifts from ∼2 eV in the visible range to 1.37 eV in the near‐infrared region by off‐stoichiometry using the vacancy sites as quasi‐substitutional virtual elements. This work advances the stoichiometry engineering of perovskite oxides using oxide molecular beam epitaxy, allowing synthesis beyond ...
Jasnamol Palakkal   +11 more
wiley   +1 more source

Studying of refractive index measurements in reflected light [PDF]

open access: yesarXiv, 2010
Two methods of refractometry in reflected light from optical surface of samples are considered and studied experimentally. Methods are grounded on results of Fresnel theory of concerning light reflectivity at near normal incidence and Brewster angle. Sources of errors for both methods were considered and possibility of measuring of the refractive index
arxiv  

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