Results 51 to 60 of about 71,204 (254)

Electrically Coded Retinomorphic Spectrophotodetector

open access: yesAdvanced Materials, EarlyView.
Self‐powered retinomorphic pyro‐photodetector is demonstrated that avoids machine‐learning post‐processing and covers 365–940 nm. Electrostatic balancing of built‐in potential produces an electrical wavelength code, delivering <3 nm wavelength decoding accuracy with ∼46 µs response.
Mohit Kumar, Hyunmin Dang, Hyungtak Seo
wiley   +1 more source

Effect of Amplifier Gain to Photoacoustic SNR (Signal to Noise Ratio) in an LED-base Photoacoustic Imaging System

open access: yesNippon Laser Igakkaishi, 2019
The possibility of using photoacoustic imaging for functional diagnosis has attracted much attention especially in the clinical field. Among such imaging systems, a system, which offers real-time imaging using compact and low-priced LEDs as a light source, has appeared. Compared to solid state lasers, the LED pulse energy was extremely small, so it had
Agano, Toshitaka, Awazu, Kunio
openaire   +4 more sources

Photoactivable Surfactant Design for In Situ Stabilization of Hydrogel Bioelectronics

open access: yesAdvanced Materials, EarlyView.
Photoactivable surfactant additive enables in situ stabilization of hydrogel bioelectronics. ABSTRACT Conductive polymer hydrogels offer unique advantages for soft, stretchable biointerfaces by combining tissue‐like mechanics with high ionic conductivity.
Seungyeon Lee   +11 more
wiley   +1 more source

Stochastic resonance of impurities diffusion induced by dichotomous noise and square-wave signal in a semiconductor layer

open access: yes四川大学学报. 自然科学版, 2016
The stochastic resonance (SR) in a semiconductor layer driven by a dichotomous noise and square-wave signal is investigated. On the assumption that the system satisfies the adiabatic approximation condition, applying the two-state theory, the expression ...
OU Jian
doaj  

Quantitative Evaluation of Display Contrast of Gd-EOB-DTPA-Enhanced Magnetic Resonance Images: Effects of the Flip Angle and Grayscale Gamma Value

open access: yesRadiology Research and Practice, 2019
Introduction. Display contrast can be changed nonlinearly by manipulating the gamma value of the grayscale. We investigated the contrast of the hepatobiliary-phase images acquired with different flip angles (FAs) and displayed with different gamma values
Yusuke Inoue   +6 more
doaj   +1 more source

1‐D Collocated Dual‐Gradient Sensory Fibers for Comprehensive Sensing and Decoding of Complex Human Motion and Physiology

open access: yesAdvanced Materials, EarlyView.
Coupled materials design enables a monolithic fiber that integrates complementary sensing regimes into a single wearable strand. By preserving informative signal features across subtle physiological deformation, large body motion, and mixed mechanical inputs, the dual‐gradient architecture generates synchronized, less redundant outputs that improve ...
Yunheum Lee   +13 more
wiley   +1 more source

Origin of Dark Current Robustness in Photomultiplication Organic Photodetectors Enabled by Ionic Conjugated Electron‐Blocking Layers

open access: yesAdvanced Materials, EarlyView.
Ionic conjugated polyelectrolyte electron‐blocking layers enable photomultiplication organic photodetectors with dark current robustness up to −10 V and external quantum efficiencies exceeding 3000%. Fowler–Nordheim tunneling, interfacial dipole, trap density of states, and noise analyses reveal how ionic conjugated polyelectrolytes suppress electron ...
Yelim Kang   +12 more
wiley   +1 more source

WIENER DENOISING BASED ON PERCEPTUAL FREQUENCY WEIGHTING AND NOISE SPECTRUM SHAPING

open access: yesElectrica, 2019
Among the numerous noise reduction techniques that were developed over the past several decades, the Wiener filter can be considered as one of the most fundamental noise reduction approaches, which has been delineated in different forms and adopted in ...
Md. Jahangir ALAM   +2 more
doaj   +2 more sources

Resolving Nanoscale Heterogeneities in Lead Halide Perovskites Through Low‐Dose Concurrent 4D‐STEM‐EDX Mapping

open access: yesAdvanced Materials, EarlyView.
Mixed‐cation lead mixed‐halide perovskites suffer from structural instabilities linked to nanoscale heterogeneity. To probe this non‐destructively, a low‐dose, concurrent 4D‐STEM and EDX methodology has been developed. Examining a (FA0.83Cs0.17)Pb(I0.8Br0.2)3 film revealed a complex mosaic of coexisting crystal structures. Crucially, local deficiencies
Jinseok Ryu   +6 more
wiley   +1 more source

Improved Signal Detection in Bistable Systems Through Stochastic Resonance Across Diverse Noise Environments

open access: yesIEEE Access
This paper presents a simulation-based analysis of stochastic resonance (SR) in bistable systems under three distinct noise conditions: Gaussian white noise, pink noise, and impulse noise.
Raghav Krishna, Dilip Kumar Choudhary
doaj   +1 more source

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