Results 81 to 90 of about 1,039,039 (252)
Single‐Sensor Vibration Sensing in Anisotropic Composites Enabled by Disordered Metasurfaces
Advanced Science, EarlyView.This work develops a single‐sensor vibration sensing (SSVS) framework that integrates disordered metasurfaces with compressive sensing. Comprehensive numerical and experimental validations demonstrate that, by manipulating anisotropic guided wave propagation through metasurfaces, the proposed SSVS framework enables high‐fidelity multi‐source vibration ...
Jianjie Zhang +6 more
wiley +1 more source
PhotonicsAtmospheric turbulence introduces distortions to the wavefront of propagating optical radiation. It causes image resolution degradation in astronomical telescopes and significantly reduces the power density of radiation on the target in focusing ...
Ilya Galaktionov, Vladimir Toporovsky
doaj +1 more source
Wavefront-sensing with a thin diffuser
, 2017 We propose and implement a broadband, compact, and low-cost wavefront sensing scheme by simply placing a thin diffuser in the close vicinity of a camera. The local wavefront gradient is determined from the local translation of the speckle pattern.
Pascal Berto (1919980) +2 more
core +1 more source
A biologically-inspired approach to designing wireless sensor networks [PDF]
, 2005 In this paper, we contend that there are significant advantages in treating some classes of sensor networks as biological-like systems-- both in structural design characteristics and in operational processes.
Haddadi, H. +3 more
core +1 more source
Chamanzar/WAVEFRONT: WAVEFRONT
, 2023 <p>The repository includes code and software related to the paper entitled Chamanzar, Elmer, Shutter, Hartings and Grover (2023).</p> <p>Presence of spreading depolarizations is known to indicate worsening brain injuries.
Chamanzar
core +1 more source
Bio‐Inspired Gradient Coatings Enhance the Leading Edge Erosion Resistance of Wind Blades
Advanced Science, EarlyView.Rain‐induced erosion of the wind turbine blade leading edge poses a critical challenge to maintenance and operation. Here, we propose a bio‐inspired approach for erosion protection utilising a platelet‐reinforced polyurethane coating with a graded through‐thickness architecture.
Natalia Sofia Guevara‐Sotelo +2 more
wiley +1 more source
Advanced Science, EarlyView.Vision begins not with images but with change: the retina fires only when something moves, handing the brain a stream of spikes. A neuromorphic imaging system adopts the same strategy—an event sensor that sees like the retina, a spiking network that thinks like the brain—to track and reconstruct fully randomly moving targets through tissue (phantom ...
Ning Zhang, Arto Nurmikko
wiley +1 more source
Characterization of the digital holographic wavefront sensor
, 2014 Paper 92421T, 14 S.Correction of atmospheric effects on the propagation of laser light can be achieved with adaptive optics (AO) by relying on adequate wavefront sensors. For free-space laser communications and for tracking of high-speed airborne objects,
Gladysz, Szymon +8 more
core +1 more source
Advanced Science, EarlyView.A metasurface‐enabled helical wavefront fingerprint (MHWF) paradigm is proposed for quantitative and specific retrieval of a liquid medium's refractive index and extinction coefficient. The liquid's complex dielectric response governs the wavefront evolution of the metasurface‐generated focused vortex beam, forming a distinctive three‐dimensional ...
Yuting Zhou +10 more
wiley +1 more source
Optical design of infrared pyramid wavefront sensor for the MMT
, 2017 We report the optical design of an infrared (0.85-1.8 \u3bcm) pyramid wavefront sensor (IRPWFS) that is designed for the 6.5m MMT on telescope adaptive optics system using the latest developments in low-noise infrared avalanche photodiode arrays.
Lardi\ue8re, Olivier +16 more
core +1 more source