Results 121 to 130 of about 844,246 (360)
Assessment of Aphakic Spectacle Lenses: High Power Flatback Lenses for the Correction of Aphakia [PDF]
, 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
Clinical OphthalmologyBharat Gurnani,1 Kirandeep Kaur2 1Department of Cataract, Cornea and Refractive Surgery, Gomabai Netralaya and Research Centre, Neemuch, Madhya Pradesh, 458441, India; 2Department of Cataract, Pediatric Ophthalmology and Strabismus, Gomabai Netralaya and
Gurnani B, Kaur K
doaj
A 3D printed low‐profile wideband circularly polarised elliptical integrated lens antenna
IET Microwaves, Antennas & PropagationThe authors presents a low‐profile wideband circularly polarised (CP) millimetre‐wave (mmWave) elliptical integrated lens antenna (ILA) fabricated by dielectric 3D printing technology.
Bin Xu, Bing Zhang, Xiao An
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Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing
Advanced Engineering Materials, EarlyView.This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu +10 more
wiley +1 more source
LED-based indoor positioning system using novel optical pixelation technique
Healthcare Technology Letters, 2019 At present, about 47 million people worldwide have Alzheimer's disease (AD), and because there is no treatment currently available to cure AD, people with AD (PWAD) are cared for.
Olaoluwa R. Popoola +4 more
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In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy
Advanced Engineering Materials, EarlyView.A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal +4 more
wiley +1 more source
Performance of aspheric spectacle lenses [PDF]
, 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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The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials ScienceThe field of making optical lenses is very vast and with great applicability in several engineering fields. The research carried out in this work implied the determination of the transmittance of optical lenses of different diopters, thicknesses, with ...
Beatrice Daniela TUDOR +1 more
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Applied Sciences, 2018 We propose a novel design method for multi-focal metallic Fresnel zone plates (MFZPs), which exploits the phase selection rule by putting virtual point sources (VPSs) at the desired focal points distant to the MFZP plane.
Jinseob Kim +5 more
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