Results 71 to 80 of about 578,588 (318)

Optical issues in measuring strabismus

Middle East African Journal of Ophthalmology, 2015
Potential errors and complications during examination and treatment of strabismic patients can be reduced by recognition of certain optical issues. This articles reviews basic as well as guiding principles of prism optics and optics of the eye to equip the reader with the necessary know-how to avoid pitfalls that are commonly encountered when using ...
openaire   +3 more sources

Effectiveness of Resistance Intradialytic Exercise Compared to Aerobic Intradialytic Exercise for Patients With Chronic Kidney Disease: A Randomized Controlled Clinical Trial

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida, Gisela Cristiane Miyamoto, Daniel da Costa Torres, Ian Setubal Reis Chaves, Jonas do Carmo Paschoalin, Braúlio Lima Nascimento, Luciana Dias Chiavegato   +6 more
wiley   +1 more source

High precision dynamic multi-interface profilometry with optical coherence tomography [PDF]

, 2011
Optical coherence tomography (OCT) has mostly been used for high speed volume imaging but its profilometry potentials have not been fully exploited. This paper demonstrates high precision (as good as ~50nm) multi-interface profilometry using a Fourier ...
Lawman, S, Samuel Lawman, Liang, H, Haida Liang   +3 more
core   +1 more source

Ship Detection from Optical Remote Sensing Images Using Multi-Scale Analysis and Fourier HOG Descriptor

Remote Sensing, 2019
Automatic ship detection by Unmanned Airborne Vehicles (UAVs) and satellites is one of the fundamental challenges in maritime research due to the variable appearances of ships and complex sea backgrounds.
Chao Dong, Jinghong Liu, Fang Xu, Chenglong Liu   +3 more
doaj   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo, Weisi Dai, Jie Mao, Mei Ye, Xingshan Lu, Xiaocui Zhang   +5 more
wiley   +1 more source

Measurement Techniques for the Optical Quality Assessment of Parabolic Trough Collector Fields in Commercial Solar Power Plants [PDF]

, 2007
The optical quality of the collector field of concentrating solar power plants is a fundamental factor for their profitability. High optical quality can be achieved and guaranteed when the manufacturing process is continuously monitored and adjusted in ...
Pottler, Klaus, Lüpfert, Eckhard, Eckhard Lüpfert, Marc Röger, Ulmer, Steffen, Steffen Ulmer, Klaus Pottler, Röger, Marc   +7 more
core  

Low-coherence optical fibre speckle interferometry [PDF]

, 2006
This paper describes the development of optical fibre low-coherence speckle interferometers capable of three-dimensional surface profiling with a resolution of 10–20 µm and a depth range of typically tens of centimetres.
Balboa, Itziar, Tatam, Ralph P., Ford, Helen D.   +2 more
core   +1 more source

A Novel 6-DOF Passive Vibration Isolation System for Aviation Optoelectronic Turret and Its Impact Analysis on Optical Systems Imaging Performance

Aerospace
In recent years, with the rapid development of the unmanned aerial vehicle industry, aviation optoelectronic turrets have been widely applied in fields such as terrain exploration, disaster prevention and mitigation, and national defense.
Wenxin Shi, Lei Li, Haishuang Fu, Chen Shui, Yijian Wang, Dejiang Wang, Xiantao Li, Bao Zhang   +7 more
doaj   +1 more source

Ship Detection in Optical Remote Sensing Images Based on Wavelet Transform and Multi-Level False Alarm Identification

Remote Sensing, 2017
Ship detection by Unmanned Airborne Vehicles (UAVs) and satellites plays an important role in a spectrum of related military and civil applications. To improve the detection efficiency, accuracy, and speed, a novel ship detection method from coarse to ...
Fang Xu, Jinghong Liu, Chao Dong, Xuan Wang   +3 more
doaj   +1 more source

Optical measurement of guided waves [PDF]

The Journal of the Acoustical Society of America, 2017
This paper demonstrates an optical method for measuring guided waves in plates that is much faster than traditional scanning approaches. By recording the wavefield with a high-speed camera and applying a post-processing method, the wavefield can be extracted from the static and noise components within the measured signal. This technique is demonstrated
Aaron T, Darnton, Massimo, Ruzzene
openaire   +2 more sources