Results 161 to 170 of about 203,102 (303)

PC-based wireless instrument for monitoring noise pollution

open access: yes, 2002
A PC-based wireless instrument for monitoring noise pollution was successfully developed. A low-powered portable FM Transmitter with a FET microphone and its Preamplifier was used to transmit the audio signal of the noise being measured to an FM Receiver
Narreto, Mary Alvean B
core  

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

open access: yesAdvanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang   +7 more
wiley   +1 more source

Magnetometry for Agriculture and Animal Systems: From Classical Sensors to Quantum-Enabled Biosensing. [PDF]

open access: yesBiosensors (Basel)
Wang Z   +9 more
europepmc   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

open access: yesAdvanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria   +6 more
wiley   +1 more source

Study on a monitoring system of the noise level in the work rooms of the campus library in Terrassa

open access: yes, 2021
This project aims at implementing the architecture proposed by a previous work done in the university, in which different paths to implementing an active noise cancelling system were attempted in simulation. The method chosen consists in identifying the system between a workroom in the UPC library and the outside of it, though in this thesis the ...
openaire   +1 more source

Universal Conductance Fluctuations in Quantum Anomalous Hall Insulators

open access: yesAdvanced Materials, EarlyView.
Universal conductance fluctuations are observed in mesoscopic quantum anomalous Hall insulators. Two distinct fluctuation patterns are identified, arising from different interference processes of bulk and chiral edge states, respectively. These findings unveil rich quantum interference phenomena in quantum anomalous Hall insulators and provide insights
Peng Deng   +11 more
wiley   +1 more source

Ultrafast Vertical Organic Electrochemical Transistors With Ion‐Permeable Conductive Polymer Top Electrodes

open access: yesAdvanced Materials, EarlyView.
Vertical organic electrochemical transistors (vOECTs) are limited in speed by ion‐impermeable metal electrodes that slow ion injection. Using ion‐permeable PBFDO top electrodes allows direct vertical ion injection into BBL channels, achieving high current densities (>400 A cm−2), large on/off ratios (>106), and ultrafast switching in 28 µs. This sets a
Han‐Yan Wu   +14 more
wiley   +1 more source

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