Results 111 to 120 of about 626,937 (305)

A comparison of posterior capsular opacification after implantation of three different hydrophobic square edge intraocular lenses

Indian Journal of Ophthalmology, 2019
Purpose: To compare the posterior capsular opacification (PCO) after implantation of three types of hydrophobic square edge intraocular lenses (IOLs). Methods: A single-center, hospital-based, cross-sectional, observational study was conducted wherein ...
H Vijaya Pai, Atiya Pathan, Yogish Subraya Kamath   +2 more
doaj   +1 more source

Observations of Time Delays in Gravitational Lenses from Intensity Fluctuations: The Coherence Function

, 2008
Measurements of the spectrum of the fluctuations of the output current of the quadratic detector of a telescope can be used to find unresolved astronomical gravitational lenses and determine time delays between their image components.
Alford, Basano, Blandford, Borra, Bracewell, Brannen, Cielo, Ermanno F. Borra, Forrester, Forrester, Forrester, Givens, Goodman, Hanbury Brown, Hanbury Brown, Klein, Loudon, Magyar, Mandel, Mandel, Peterson, Press, Purcell, Refsdal, Refsdal, Spillar, Twiss   +26 more
core   +1 more source

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

Quartz isolatings in the shales and amphibolites of the East-Ufalei zone as a source for the production of high-purity quartz raw materials (Southern Urals)

Литосфера, 2019
Research subject. In this research, we studied lenses, nodules and interlayers of granulated quartz, which are located in amphibolites and shales in the eastern part of the Ufalei gneso-amphibolite complex.Materials and methods.
M. A. Igumentseva, L. Y. Kabanova, V. N. Anfilogov, M. V. Shtenberg, I. A. Blinov, V. M. Ryzhkov   +5 more
doaj   +1 more source

Gravitational Lensing Statistics in Universes Dominated by Dark Energy

, 2003
We study lens statistics in flat, low-density universes with different equations of state $w=p_Q/\rho_Q$ for the dark energy component. Dark energy modifies the distance-redshift relation and the mass function of dark matter halos leading to changes in ...
Bartelmann M., Charles R. Keeton, Frieman J. A., Henstock D. R., Michael Kuhlen, Narayan R., Piero Madau, Zhao H.   +7 more
core   +1 more source

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

Contact Lenses [PDF]

Clinical and Experimental Optometry, 1947
openaire   +5 more sources

The Disinfecting Potential of Contact Lens Soutions used by Sultan Qaboos University Students

Sultan Qaboos University Medical Journal, 2011
Objectives: This study aimed to determine the disinfecting potential of some contact lens solutions used by some university students in Oman. Methods: This work was carried out from January to June 2010 in the Department of Microbiology & Immunology ...
B. C. Nzeako, Sara H Al-Sumri
doaj  

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

Estimating Heart Rate from Inertial Sensors Embedded in Smart Eyewear: A Validation Study

Sensors
Smart glasses are promising alternatives for the continuous, unobtrusive monitoring of heart rate (HR). This study validates HR estimates obtained with the “Essilor Connected Glasses” (SmartEW) during sedentary activities.
Sarah Solbiati, Federica Mozzini, Jean Sahler, Paul Gil, Bruno Amir, Niccolò Antonello, Diana Trojaniello, Enrico Gianluca Caiani   +7 more
doaj   +1 more source