Results 121 to 130 of about 30,667 (264)

Wavefront Correction of Ionospherically Propagated HF Radio Waves Using Covariance Matching Techniques [PDF]

open access: yesRadioengineering, 2017
High Frequency (HF) radio waves propagating in the ionospheric random inhomogeneous media exhibit a spatial nonlinearity wavefront which may limit the performance of conventional high-resolution methods for HF sky wave radar systems.
Y. Zhu, Y Wei, P. Tong
doaj  

Spatial Light Modulator for wavefront correction

open access: yes, 2009
12 figures, 2 tables, in modified format (10 pages), published in the proceedings of International Conference on Trends in Optics and Photonics., (Ajay Ghosh and Debesh Choudhury, eds.) March 2009, Kolkata, India., pp.
Vyas, Akondi   +3 more
openaire   +2 more sources

In silico modelling of multi‐electrode arrays for enhancing cardiac drug testing on hiPSC‐CM heterogeneous tissues

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Schematic overview of the experimental and computational framework for investigating hiPSC‐CM electrophysiology with MEA systems. The MEA‐based model integrates experimental data with phenotype‐specific ionic models and tissue‐level heterogeneity.
Sofia Botti   +2 more
wiley   +1 more source

A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

open access: yesScientific Reports, 2017
Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system
Babak Amirsolaimani   +4 more
doaj   +1 more source

Combined conjugate and pupil adaptive optics in widefield microscopy [PDF]

open access: yes, 2016
Traditionally, adaptive optics (AO) systems for microscopy have focused on AO at the pupil plane, however this produces poor performance in samples with both spatially-variant aberrations, such as non-flat sample interfaces, and spatially-invariant ...
Beaulieu, Devin Robert
core   +1 more source

An integrated platform for 2‐D and 3‐D optical and electrical mapping of arrhythmias in Langendorff‐perfused rabbit hearts

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Integrated multimodal platform for panoramic cardiac mapping in isolated heart experiments. On the left, an image of the experimental setup during data acquisition showing a Langendorff‐perfused rabbit heart surrounded by three optical cameras (CAM A, B and C) positioned 120° apart, each coupled with high‐power LEDs for panoramic
Jimena Siles   +8 more
wiley   +1 more source

Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism

open access: yesClinical Ophthalmology, 2015
Steven C Schallhorn,1,2 Jan A Venter,2 Stephen J Hannan,2 Keith A Hettinger2 1University of California, San Francisco, CA, USA; 2Optical Express, Glasgow, UK Purpose: The purpose of this study was to evaluate the refractive and visual outcomes of ...
Schallhorn SC   +3 more
doaj  

Deep learning enabled robust wavefront sensing for active beam smoothing with a continuous phase modulator

open access: yesHigh Power Laser Science and Engineering
In laser systems requiring a flat-top distribution of beam intensity, beam smoothing is a critical technology for enhancing laser energy deposition onto the focal spot.
Yamin Zheng   +9 more
doaj   +1 more source

In silico predictions of action potential propagation in doxorubicin cardiotoxicity: A parametric study using preclinical 3D magnetic resonance imaging‐based fibrotic left ventricle models

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Schematic overview of the study's methodology and key findings. In a preclinical swine model, doxorubicin administration induced cardiotoxicity, characterized by diffuse fibrotic remodelling and altered electrical function, as assessed by magnetic resonance (MR) imaging and electrophysiological mapping.
Javier Villar‐Valero   +7 more
wiley   +1 more source

Research Progress of Deformable Mirror and Its Control Algorithm

open access: yesGuangtongxin yanjiu
【Objective】Deformable Mirror(DM) is a key device in adaptive optics system for wavefront correction, and its performance directly determines the wavefront correction capability of the system.
LIANG Jingyuan   +7 more
doaj  

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