Results 151 to 160 of about 833,654 (360)

Assessment of Aphakic Spectacle Lenses: High Power Flatback Lenses for the Correction of Aphakia

open access: yes, 1980
The spectacle wearing aphakic patient has severe optical and other problems compared with most other spectacle wearers. Recently, aspheric lenses with relatively flat back surfaces have been introduced for the correction of aphakia which are claimed to (
Smith, George, Atchison, David A.
core  

Enhanced Terahertz Thermoelectricity Via Engineered Van Hove Singularities and Nernst Effect in Moiré Superlattices

open access: yesAdvanced Functional Materials, EarlyView.
Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin   +16 more
wiley   +1 more source

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

open access: yesAdvanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee   +5 more
wiley   +1 more source

Lenses

open access: yes
Lenses utilized for a camera or in other ...

core  

Performance of aspheric spectacle lenses

open access: yes, 1992
With improvements in spectacle lens technology, several aspheric lens designs have become available in the moderate power range for prescribing by ophthalmic practitioners.
Tame, Simon A., Atchison, David A.
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Multiplex Modular Nanorobotic Systems with Catalytic Activity under Magnetic Navigation

open access: yesAdvanced Functional Materials, EarlyView.
We present modular nanorobots composed of a magnetic propulsion module and different extension modules carrying functional activities, assembled via DNA base pairing. The system integrates propulsion, optical tracking, enzymatic catalysis, and cell docking in a programmable manner.
Voichita Mihali   +7 more
wiley   +1 more source

Multiple Lenses, Multiple Stories

open access: yes
Introduction To Sociology: Developing The Sociological ImaginationThis visual project explores wage inequality through multiple lenses (gender, queer, racial, economic, postcolonial and environmental).
Reyes, Arhonda
core  

Tolerance to spherical aberration induced by rigid contact lenses

open access: yes, 1992
We have investigated the effects of spherical aberration (SA) on visual performance by fitting subjects with rigid lenses of varying front surface asphericity.
Newman, Stephen D.   +7 more
core   +1 more source

A Non‐Reciprocal Architected Porous Medium

open access: yesAdvanced Functional Materials, EarlyView.
ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies   +2 more
wiley   +1 more source

Laboratory Evaluation of Commercial Aspheric Aphakic Lenses

open access: yes, 1983
Four types of commercial aspheric aphakic lenses were assessed with respect to mass, spectacle magnification, off-axis power errors, and peripheral distortion.
Smith, George, Atchison, David A.
core  

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