Results 91 to 100 of about 308,967 (294)

An All‐Optical Driven Bio‐Photovoltaic Interface for Active Control of Live Cells

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐photovoltaic Interface (BIO‐PV‐I) for live cell manipulation is presented. BIO‐PV‐I can be activated non‐invasively and remotely to control the spatial motility, adhesion, and morphology of cells adhering to it. BIO‐PV‐I uses a patterned light‐induced electric potential in iron‐doped lithium niobate crystals whose light‐driven and reversible nature,
Lisa Miccio   +8 more
wiley   +1 more source

Correlation analysis of lens and anterior chamber angle structure in individuals aged 60 and above in Northwest China

open access: yesYanke Xuebao
[Objective:] To explore the influencing factors of lens thickness (LT) and relative lens position (RLP) in individuals aged 60 and above in Northwestern China, as well as their correlation with anterior chamber angle structure.
CHEN Juexiao   +13 more
doaj   +1 more source

Atomic‐Scale Light Coupling Control in Ultrathin Photonic Membranes

open access: yesAdvanced Functional Materials, EarlyView.
Ultrathin photonic nanomembranes provide atomic‐scale control over the coupling between incident light and high‐Q photonic modes, enabling angstrom‐level resonance tuning and strong field confinement. When integrated with TMD monolayers, they further yield enhanced light–matter interactions, offering a versatile platform for advancing quantum photonics,
Chih‐Zong Deng   +8 more
wiley   +1 more source

The influence of age and gender on ocular biometrics and corneal astigmatism in adults undergoing cataract surgery

open access: yesSAGE Open Medicine
Objectives: To assess the influence of age and gender on ocular biometric values and corneal astigmatism features in individuals undergoing phacoemulsification surgery and intraocular lens implantation.
Ali Sharifi   +6 more
doaj   +1 more source

Impact of multifocal contact lens wear on optical coherence tomography measurements of the cornea and retina

open access: yesPhotodiagnosis and Photodynamic Therapy
Purpose: This study aimed to evaluate the influence of multifocal contact lenses (MFCLs) on structural optical coherence tomography (OCT) parameters, including central corneal thickness (CCT), ganglion cell–inner plexiform layer (GCIPL) thickness, and ...
Atılım Armağan Demirtaş   +3 more
doaj   +1 more source

Subwavelength imaging with opaque left-handed nonlinear lens

open access: yes, 2004
We introduce the concept of subwavelength imaging with an opaque nonlinear left-handed lens by generating the second-harmonic field. We consider a slab of composite left-handed metamaterial with quadratic nonlinear response and show that such a flat lens
Kivshar, Yuri S.   +3 more
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

open access: yesAdvanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky   +3 more
wiley   +1 more source

The distribution of axial length, anterior chamber depth, lens thickness, and vitreous chamber depth in an adult population of Shahroud, Iran

open access: yesBMC Ophthalmology, 2012
Background Ocular biometric parameters can be influenced by race, ethnicity, and genetics; their differences across different populations can probably explain differences in refractive errors in these populations.
Hashemi Hassan   +6 more
doaj   +1 more source

Parametric Analysis of Negative and Positive Refractive Index Lens Antenna by ANSYS HFSS

open access: yesInternational Journal of Antennas and Propagation, 2020
Lens antennas with multibeam, high gain, and low sidelobe level are potential candidates for base station antennas in 5G mobile communication. In this paper, the authors perform simulation and parametric analysis of a lens antenna with positive and ...
Phan Van Hung   +4 more
doaj   +1 more source

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

open access: yesAdvanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles   +16 more
wiley   +1 more source

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