Results 71 to 80 of about 376,107 (295)
Improved alternating gradient transport and focusing of neutral molecules [PDF]
, 2001 Polar molecules, in strong-field seeking states, can be transported and focused by an alternating sequence of electric field gradients that focus in one transverse direction while defocusing in the other. We show, by calculation and numerical simulation,
Gould, Harvey +2 more
core +4 more sources
Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
Wind lens technology and its application to wind and water turbine and beyond
Renewable Energy and Environmental Sustainability, 2017 Wind lens is a new type of wind power system consisting of a simple brimmed ring structure that surrounds the rotor causing greater wind to pass through the turbine.
Ohya Yuji +3 more
doaj +1 more source
Efficacy of orthokeratology lenses depending on topograpy pupil diameter and lens optical zone size
Journal of Ophthalmology, 2021 Background: Management of progressive myopia is a major issue in current optometry and oph-thalmology in general. Refractive therapy with orthokeratology lenses (OKL) has become an in-creasingly popular technique for controlling the progression of myopia.
R. A. Parkhomets
doaj +1 more source
Angular diameter distances reconsidered in the Newman and Penrose formalism
, 2016 Using the Newman and Penrose spin coefficient (NP) formalism, we provide a derivation of the Dyer-Roeder equation for the angular diameter distance in cosmological space-times.
Aly, Aly, Kling, Thomas P.
core +1 more source
Rigid Lens Tear Pump Efficiency: Effects of Overall Diameter/Base Curve Combinations [PDF]
Optometry and Vision Science, 1991 The effect of changes in rigid contact lens overall and optic zone diameters on tear pump efficiency were studied using a polarographic technique. Six overall diameters ranged from 7.6 to 10.6 mm in 0.6-mm steps, with the optic zone diameter always being 1.4 mm smaller.
Fink, Barbara A. +2 more
openaire +2 more sources
Nanoindentation Criteria for Combinatorial Thin Film Libraries
Advanced Engineering Materials, EarlyView.Thin‐film material libraries are compositional spreads used for screening composition‐structure‐property relationships. Nanoindentation is often used to characterize mechanical behavior across these systems, however variations in methodology are widespread.
Andre Bohn, Adie Alwen, Andrea M. Hodge
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2020 Ion beam etching is effectively used for the fabrication of high-precision optics. The main application of ion beam etching is to figure large optical surfaces to correct shape errors remaining on polished surfaces. To figure small or medium-size optical
Hideo TAKINO +2 more
doaj +1 more source
Lens Biometry in Congenital Lens Deformities: A Swept-Source Anterior Segment OCT Analysis
Frontiers in Medicine, 2021 Aims: To investigate the lens biometric parameters in congenital lens deformities, using a novel technique of swept-source anterior segment optical coherence tomography (SS-ASOCT).Methods: This prospective study included patients with microspherophakia ...
Ze-xu Chen +8 more
doaj +1 more source
An investigation of gravitational lens determinations of H_o in quintessence cosmologies [PDF]
, 2002 There is growing evidence that the majority of the energy density of the universe is not baryonic or dark matter, rather it resides in an exotic component with negative pressure.
Bean +36 more
core +2 more sources