Results 71 to 80 of about 200,462 (294)
Prevalence and risk factors for myopia among school children in Aba, Nigeria
African Vision and Eye Health, 2017 Aim: To study the prevalence of myopia among school children in Aba, Nigeria. Methods: This cross-sectional study was conducted in public and private (primary and secondary) schools.
Uchenna C. Atowa +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand +13 more
wiley +1 more source
Oftalʹmologiâ, 2017 The review presents an analysis of the literature data on the methods of surgical correction of residual refractive error after cataract phacoemulsification. Keratorefractive and intraocular approaches are considered in details.
K. B. Pershin +4 more
doaj +1 more source
Metrology of Complex Refractive Index for Solids in the Terahertz Regime Using Frequency Domain Spectroscopy [PDF]
, 2018 Frequency domain spectroscopy allows an experimenter to establish optical properties of solids in a wide frequency band including the technically challenging 10 THz region, and in other bands enables metrological comparison between competing techniques ...
Chick, Steven +3 more
core +2 more sources
A Non‐Reciprocal Architected Porous Medium
Advanced Functional Materials, EarlyView.ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies +2 more
wiley +1 more source
Imaging point sources in heterogeneous environments
, 2019 Imaging point sources in heterogeneous environments from boundary or far-field measurements has been extensively studied in the past. In most existing results, the environment, represented by the refractive index function in the model equation, is ...
Ren, Kui, Zhong, Yimin
core +1 more source
Advanced Functional Materials, EarlyView.This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim +6 more
wiley +1 more source
Adult Progression and Incidence of Refractive Errors in Students of a Medical College in India
Journal of Marine Medical SocietyPurpose: We aimed to study the adult progression and incidence of refractive errors in students of a medical college in India and to document risk factors for myopia in them. Materials and Methods: This was a retrospective prospective study involving 205
Surg Cdr Lanka Sriharsha +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang +3 more
wiley +1 more source