Results 51 to 60 of about 533 (174)

Synaptic Function in Memristor Devices for Neuromorphic Circuit Applications

Advanced Electronic Materials, Volume 11, Issue 14, September 4, 2025.
Discover how neuromorphic devices mimic brain‐like learning: this article explores how ionic and electronic conduction processes enable artificial synapses to adapt across time scales. Uncover the essential ingredients—state‐variable dynamics, rectification, and memory—and how they can be probed through nonlinear diagnostics to engineer smarter, more ...
Juan Bisquert, Wooyoung Shim, So‐Yeon Kim, Bernabe Linares‐Barranco   +3 more
wiley   +1 more source

Photorefraction and Optical Damage Resistance Enhancement in Uranium-Doped Lithium Niobate Crystals by Hafnium Co-Doping

Crystals
A series of Hf co-doped uranium-doped lithium niobate (LN:U,Hf) crystals with a diameter of one inch were grown by the modified Bridgman method. XPS analysis showed that U ions coexist in mixed valence states of U4+, U5+, and U6+.
Jiayue Xu, Ming Xi, Dong Zhang, Chenkai Fang, Dahuai Zheng, Hongde Liu, Yaoqing Chu, Hui Shen, Tian Tian   +8 more
doaj   +1 more source

Bilateral spontaneous dislocation of posterior chamber intraocular lens in a patient with gyrate atrophy

Indian Journal of Ophthalmology, 2012
We report a patient with gyrate atrophy, a rare metabolic disease, who had bilateral late spontaneous posterior dislocation of in-the-bag posterior chamber intraocular lens (PCIOL). He underwent pars plana vitrectomy, PCIOL retrieval and anterior chamber
Michael Kinori, Howard Desatnik, Joseph Moisseiev   +2 more
doaj   +1 more source

Optimising non‐cycloplegic screening strategies for early detection of pre‐myopia and myopia in young children

Ophthalmic and Physiological Optics, Volume 45, Issue 5, Page 1080-1089, July 2025.
Abstract Purpose Early detection of myopia is essential to delay its onset and progression. Pre‐myopia, defined by an inadequate hyperopic reserve, increases myopia risk in childhood. However, effective screening methods remain limited. This study aimed to develop practical non‐cycloplegic screening methods for pre‐myopia and myopia in 6‐ to 7‐year ...
Síofra Harrington, Michael Moore, James Loughman, Ian Flitcroft, Veronica O'Dwyer   +4 more
wiley   +1 more source

Short-term outcome of Boston Type 1 keratoprosthesis for bilateral limbal stem cell deficiency

Indian Journal of Ophthalmology, 2012
This study reports the short-term functional and anatomical outcome of Boston Type 1 keratoprosthesis (Boston Kpro) implantation for bilateral limbal stem cell deficiency (LCSD).
Sayan Basu, Mukesh Taneja, Raja Narayanan, Sirisha Senthil, Virender S Sangwan   +4 more
doaj   +1 more source

Photoinduced Etherification of Ru(II)‐Coordinated Chloromethyl‐Modified 2,2′‐Bipyridine Complex and Structural Characterization of Its Photoproducts

European Journal of Inorganic Chemistry, Volume 28, Issue 15, May 28, 2025.
The photochemical reaction of [Ru(phen)2{(ClCH2)2bpy}](OTf)2 (OTf− = CF3SO3−) in water, an alcohol, or acetic acid [ROH; R = H, Me, Et, 1‐Pr, 2‐Pr, or Ac] afforded [Ru(phen)2{(ROCH2)2bpy}](OTf)2 and two moles of HCl per Ru(II) complex. These photoproducts are characterized by elemental analysis and 1H NMR spectroscopy. Crystal structures of [Ru(phen)2{(
Mari Toyama, Yuki Asano
wiley   +1 more source

Optical properties of double doped LiNbO3:Gd:Mg crystals

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
By direct alloying of congruent melt with magnesium and gadolinium oxides, compositionally uniform nonlinear optical single double doped crystals with different content of dopants have been grown: LiNbO3:Gd3+(0,003):Mg2+(0,65 wt.
N.A. Teplyakova, N.V. Sidorov, M.N. Palatnikov   +2 more
doaj   +1 more source

Increasing myopia in Scotland at age of 3.5–5.5 years: A retrospective epidemiological study

Ophthalmic and Physiological Optics, Volume 45, Issue 3, Page 834-844, May 2025.
Abstract Purpose Scotland has comprehensive child vision screening at age 3.5–5.5 years of age, with ~85% participation (40,000–50,000 screening episodes annually). Orthoptists deliver the screening, including presenting vision, cover test and other tests. Screening failures are referred for eye examinations, including cycloplegic refraction. The study
Bruce J. W. Evans, Lee Pentland, Benjamin E. W. Evans, David F. Edgar, Rakhee Shah, Miriam L. Conway   +5 more
wiley   +1 more source

Fulminant toxoplasmic retinochoroiditis following intravitreal triamcinolone administration

Indian Journal of Ophthalmology, 2012
We report two cases of fulminant toxoplasmic retinochoroiditis following intravitreal triamcinolone acetonide (IVTA) administration. Case 1: A 42-year-old female received IVTA for presumed non-infectious panuveitis. Within 2 months, she developed diffuse
Ryan Rush, Saumil Sheth
doaj   +1 more source

Detection of significant vision conditions in children using QuickSee wavefront autorefractor

Ophthalmic and Physiological Optics, Volume 44, Issue 3, Page 501-513, May 2024.
Abstract Purpose This study evaluated the ability of QuickSee to detect children at risk for significant vision conditions (significant refractive error [RE], amblyopia and strabismus). Methods Non‐cycloplegic refraction (using QuickSee without and with +2 dioptre (D) fogging lenses) and unaided binocular near visual acuity (VA) were measured in 4‐ to ...
Anh Bui, G. Lynn Mitchell, Catherine McDaniel, Ann Morrison, Andrew Toole, Michelle Buckland, Marjean T. Kulp   +6 more
wiley   +1 more source