Results 81 to 90 of about 2,494,174 (257)

Limits to the Hall Effect and Other Nonreciprocal Effects in Three‐Dimensional Metamaterials

open access: yesAdvanced Materials, EarlyView.
Comprehensive and fundamental bounds on nonreciprocal effects in three‐dimensional metamaterials are derived. They reveal that the effective Hall mobility cannot exceed the largest constituent mobility, that, under certain conditions, the Verdet constant cannot be enhanced, and that, for constituents with Hall coefficients of the same sign, the largest
Christian Kern, Graeme W. Milton
wiley   +1 more source

In situ visualization of tears on contact lens using ultra high resolution optical coherence tomography [PDF]

open access: yes, 2009
To demonstrate the capability of directly visualizing the tear film on contact lenses using optical coherence tomography (OCT). Six eyes of three healthy subjects wearing PureVision and ACUVUE Advance soft and Boston RGP hard contact lenses were imaged ...
Ruggeri, Marco   +5 more
core   +1 more source

Descemet Membrane Endothelial Keratoplasty for Bullous Keratopathy and Posterior Corneal Opacities

open access: yesVision Pan-America, 2015
Although the presence of central corneal opacities could limit the visual prognosis, Descemet Membrane Endothelial Keratoplasty (DMEK) was performed and completely resolved corneal edema and opacities on the visual axis.
Pedro Bertino, Renata Soares Magalhães
doaj   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

open access: yesAdvanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

Corneal erosions in contact lens wear

open access: yes, 2012
Contact lens wear continues to be the highest single risk factor for microbial keratitis, particularly when worn in the extended wear modality. For microbial keratitis to occur, the presence of at least a bacterial load as well as a break in the corneal ...
Eric Papas   +7 more
core   +1 more source

Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes

open access: yesAdvanced Materials, EarlyView.
Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti   +11 more
wiley   +1 more source

A survey of contact lens wear among diabetic patients in the United Kingdom

open access: yes, 1997
A survey of attitudes to the fitting of contact lenses to diabetic patients was sent to 1122 optometric, ophthalmological and dispensing members of the British Contact Lens Association; 418 completed questionnaires were analysed.
Boulton, Andrew J. M.   +2 more
core   +1 more source

Generating Unconventional Spin‐Orbit Torques With Patterned Phase Gradients in Tungsten Thin Films

open access: yesAdvanced Materials, EarlyView.
ABSTRACT A key aim in spintronics is to achieve current‐induced magnetization switching via spin‐orbit torques without external magnetic fields. For this, the focus of recent work has been on introducing controlled lateral gradients across ferromagnet/heavy‐metal devices, giving variations in thickness, composition, or interface quality.
Lauren J. Riddiford   +9 more
wiley   +1 more source

Anterior segment optical coherence tomography angiography to evaluate the peripheral fitting of scleral contact lenses

open access: yesClinical Optometry, 2018
Imma Gimenez-Sanchis,1 Beatriz Palacios-Carmen,1 Angel García-Garrigós,1 Javier Cantó-Vañó,1 Antonio J Pérez-Ortega,1 David P Piñero2 1Opticas ClaraVisión, Ontinyent, Spain; 2Department of Optics ...
Gimenez-Sanchis I   +5 more
doaj  

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