Results 101 to 110 of about 361,928 (300)

Arctic ambient noise mechanisms [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1987
The study of ambient noise ca n be divided into two categories, one dealing with the correlation of averaged noise with the slow evolution of environmental parameters, and the other concentrating on details of the ice fracture processes that ultimately give rise to individual noise events.
openaire   +1 more source

Mesoporous Carbon Thin Films with Large Mesopores as Model Material for Electrochemical Applications

open access: yesAdvanced Functional Materials, EarlyView.
Mesoporous carbon thin films possessing 70 nm mesopores are prepared on titanium substrates by soft templating of resol resins with a self‐synthesized poly(ethylene oxide)‐block‐poly(hexyl acrylate) block copolymer. A strategy to avoid corrosion of the metal substrate is presented, and the films are extensively characterized in terms of morphology ...
Lysander Q. Wagner   +9 more
wiley   +1 more source

Minimizing noise-temperature measurement errors [PDF]

open access: yes
An analysis of noise-temperature measurement errors of low-noise amplifiers was performed. Results of this analysis can be used to optimize measurement schemes for minimum errors. For the cases evaluated, the effective noise temperature (Te) of a Ka-band
Stelzried, C. T.
core   +1 more source

Selection Strategies for Flexible Pressure Sensor Electrode Materials Toward Ultrafast Response

open access: yesAdvanced Functional Materials, EarlyView.
This study reveals, for the first time, how the electrode–organic interface governs the temporal performance of flexible pressure sensors. By pairing high‐conductivity CVD PEDOT with commonly used metal electrodes, the authors demonstrate that interfacial energy alignment dictates microsecond‐scale response, providing a straightforward design strategy ...
Jinwook Baek   +11 more
wiley   +1 more source

In Materia Shaping of Randomness with a Standard Complementary Metal‐Oxide‐Semiconductor Transistor for Task‐Adaptive Entropy Generation

open access: yesAdvanced Functional Materials, EarlyView.
This study establishes a materials‐driven framework for entropy generation within standard CMOS technology. By electrically rebalancing gate‐oxide traps and Si‐channel defects in foundry‐fabricated FDSOI transistors, the work realizes in‐materia control of temporal correlation – achieving task adaptive entropy optimization for reinforcement learning ...
Been Kwak   +14 more
wiley   +1 more source

Ambient noise multimode surface wave tomography

open access: yesProgress in Earth and Planetary Science
Seismic techniques using earthquakes are powerful tools for exploring the Earth’s internal structure. However, the earthquake distribution limits the spatial resolution.
Kiwamu Nishida   +2 more
doaj   +1 more source

Ambient noise levels in the chemotherapy clinic

open access: yesNoise and Health, 2011
Many of the drugs used for chemotherapy treatments are known to be ototoxic, and can result in permanent hearing threshold shifts. The degree of ototoxic damage can be influenced by many factors including dosage, duration of exposure, genetics, and ...
Dana K Gladd, Gabrielle H Saunders
doaj   +1 more source

On the Relationship between Transmission Power and Capacity of an Underwater Acoustic Communication Channel

open access: yes, 2008
The underwater acoustic channel is characterized by a path loss that depends not only on the transmission distance, but also on the signal frequency.
Lucani, Daniel E.   +2 more
core   +3 more sources

Contact Lens with Moiré Patterns for High‐Precision Eye Tracking

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a passive contact lens for high‐precision eye tracking, integrating a microscopic moiré grating label. The parallax‐induced shift of macroscopic moiré patterns enables angle measurement with 0.28° precision using a standard camera under ambient light.
Ilia M. Fradkin   +11 more
wiley   +1 more source

Community acceptance of helicopter noise: Criteria and application [PDF]

open access: yes
A study was conducted to define those criteria necessary for civil helicopter operations to be acoustically acceptable to the communities from which they operate and over which they fly.
King, R. J., Munch, C. L.
core   +1 more source

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