Results 101 to 110 of about 1,517,602 (292)

Neuromorphic Devices for Extreme Environments: State‐Variable Reliability and Stabilization Strategies

Advanced Functional Materials, EarlyView.
Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park, Geon Park, Junhyung Cho, Jaechan Song, Wangmyung Choi, Jaehyun Hur, Nicola Gasparini, Hocheon Yoo   +7 more
wiley   +1 more source

COMPARISON OF THE EFFICACY OF HYDROXYPROPYL METHYLCELLULOSE/ DEXTRAN, SODIUM HYALURONATE AND POLYETHYLENE GLYCOL/PROPYLENE GLYCOL BASED COMMERCIAL ARTIFICIAL TEAR PRODUCTS USING THE NONINVASIVE TEAR FILM BREAKUP TIME

Pakistan Armed Forces Medical Journal, 2020
Objective: To compare the efficacy of sodium hyaluronate, hydroxypropyl methylcellulose/dextran and polypropylene/polyethylene glycol based commercial artificial tear products using the noninvasive tear film breakup time.
Faisal Aziz Khan, Shafaq Pervez Khan Niazi, Irshad Hussain   +2 more
doaj   +4 more sources

Comparative assessment of structural and tear film alterations in rabbit meibomian gland dysfunction models using chemical and electrocauterization techniques

Scientific Reports
Meibomian gland dysfunction (MGD) constitutes the most common cause of dry eye disease (DED), where altering meibum or lipids result in tear film instability. This study compares structural and tear film changes induced by chemical cauterization (CC) and
Deeksha Prasad, Saumya Jakati, Kiran Kumar Bokara, Sayan Basu, Vivek Singh, Pragnya Rao Donthineni   +5 more
doaj   +1 more source

A Comparative Study on Tear Film Analysis in Patients Undergoing Photorefractive Keratomileusis, Sub Bowman’s Keratomileusis, and Femtosecond-assisted Laser in situ Keratomileusis

Delhi Journal of Ophthalmology
Aim: To evaluate tear film stability, tear secretion, lipid layer thickness in patients undergoing Photo refractive keratectomy (PRK), Sub bowman’s keratomileusis (SBK), and femtosecond-assisted laser in situ keratomileusis (femto LASIK).
Harika Reddy, B. Shashidhar, V. Haritha
doaj   +1 more source

Non-invasive assessment of tear film surface quality [PDF]

, 2010
The tear film plays an important role preserving the health of the ocular surface and maintaining the optimal refractive power of the cornea. Moreover dry eye syndrome is one of the most commonly reported eye health problems.
Alonso-Caneiro, David
core  

Tear film measurement by optical reflectometry technique

, 2014
Evaluation of tear film is performed by an optical reflectometer system with alignment guided by a galvanometer scanner. The reflectometer system utilizes optical fibers to deliver illumination light to the tear film and collect the film reflectance as a
Lu, Hui, Shen, Meixiao, Wang, Jianhua, Wang, Michael R   +3 more
core   +1 more source

Bistable Isochoric Chiral Metamaterials with Reprogrammable Multiaxial Responses

Advanced Functional Materials, EarlyView.
An isochoric bistable rotational unit cell enables in situ modification of internal contact conditions post‐fabrication, without altering the global envelope dimensions of the surrounding architecture. By selectively switching between open and closed states, the tessellated chiral metamaterial can reprogram its volumetric response, including bulk ...
Shujia Chen, Lei Wu, Jingran Liu, Damiano Pasini   +3 more
wiley   +1 more source

In Situ Interfacial Assembly of Dynamic Semi‐Interpenetrating Biopolymer Networks for Robust and Mechanically Adaptive Droplet Interfaces

Advanced Functional Materials, EarlyView.
A dynamic interfacial semi‐interpenetrating polymer network is constructed by sequential assembly of β‐sheet‐rich SF and CS‐RL. The SF framework provides mechanical strength, while dynamically associated CS‐RL enables local rearrangement, allowing droplets to rapidly reconfigure without loss of interfacial integrity.
Yaping Zhang, Yujie Liu, Yikai Xu, Xunda Feng, Ling Zhang, Hongbo Zeng, Hao Liu, Xiaohui Mao   +7 more
wiley   +1 more source

Ultra‐Thin Tow‐Based Discontinuous Composites—Material Overview and Aspirations

Advanced Functional Materials, EarlyView.
Tow‐based discontinuous composites made from ultra‐thin tapes offer outstanding in‐plane mechanical properties. This material, inspired by Nacre, has high volume fraction of tapes exceeding 90 % and allows for quasi‐isotropic material plates less than 100 micrometer in thickness.
Ioannis Katsivalis, Vasiliki Safranoglou, Luis Gulfo, Michael R. Wisnom, Martin Fagerström, Malin Åkermo, Soraia Pimenta, Dan Zenkert, Leif E. Asp   +8 more
wiley   +1 more source

Comparison of the different operation room environmental exposures on tear film function before and after operation

Heliyon
1.2 Previous studies have confirmed that air and light pollution can cause damage to a number of systems throughout the body, including the ocular surface and retina. However, the exact effect of air pollution and light pollution on tear film function is
Yufei Dang, Ming Zhang, Yanqiang Wei, Na Duan, Linjuan Zhang, Rujia Liu, Zhen Zhang, Yue Zhang, Li Li   +8 more
doaj   +1 more source