Results 51 to 60 of about 1,309 (186)

Dissociation Between Hemodynamic and Metabolic Responses to Chemogenetic Modulation of Astrocytes in Mouse Visual Cortex

open access: yesGlia, Volume 74, Issue 7, July 2026.
Chemogenetic astrocytic modulation in mouse visual cortex showed no local glucose uptake change (PET) but enhanced hyperemia and vasomotion (fUSi), revealing a local dissociation with a negative correlation between metabolic and hemodynamic signals.
Mickaël Pereira   +10 more
wiley   +1 more source

Mode Separation for Multimodal Ultrasonic Lamb Waves Using Dispersion Compensation and Independent Component Analysis of Forth-Order Cumulant

open access: yesApplied Sciences, 2019
Ultrasonic Lamb wave testing has been successfully applied in nondestructive testing. However, because of Lamb wave multimodal and dispersion characteristics, the received signals are often multimodal and overlapping, which makes them very complicated ...
Xiao Chen, Dandan Ma
doaj   +1 more source

Ultrasonic gas flow metering in hydrogen-mixed natural gas using Lamb waves

open access: yesAIP Advances, 2023
Hydrogen mixing in existing natural gas pipelines efficiently achieves large-scale, long-distance, and low-cost hydrogen delivery. The physical properties of hydrogen and natural gas differ significantly.
Shouhu Ji   +5 more
doaj   +1 more source

State of the UK Climate in 2025

open access: yesInternational Journal of Climatology, Volume 46, Issue S1, July 2026.
This report provides a summary of the state of the UK's climate in 2025. It is one of a series of annual reports published in the International Journal of Climatology since 2018. It presents the latest assessment of UK climate trends, variations and extremes based on the most up to date observations from the land network of weather stations.
Mike Kendon   +14 more
wiley   +1 more source

High Frequency Ultrasonic Measurements

open access: yesMeasurement + Control, 1988
The use of high frequency ultrasonic Lamb waves to measure the thickness of thin plates and foils, is discussed and the feasibility of their application to the determination of the degree of cure of polymer coating on coated tin plated steel sheet (as ...
N Zarsav
doaj   +1 more source

Developing a Heterogeneous Attenuation Model for Fiber Reinforced Thermoplastic Composites in the Kilohertz Region of the Ultrasonic Spectrum

open access: yesPolymer Composites, Volume 47, Issue S2, Page S85-S95, 20 June 2026.
Acquisition, filtering and modeling by genetic programming (tree pattern) of the acoustic signal for fiber‐filled composites. ABSTRACT This study experimentally investigated the discrete phase contributions of fibers and entrapped air on the attenuation spectrum of a fiber‐filled thermoplastic composite and derives a mathematical expression for sound ...
Austin D. Bedrosian   +3 more
wiley   +1 more source

The Simulation Method for Ultrasonic Non-Destructive Testing of Delamination Defects in CMC Based on Air-Coupled Lamb Waves

open access: yesAcoustics
Ceramic Matrix Composite (CMC) are widely used in aerospace due to the advantages such as high-temperature resistance and lightweight properties. Detecting defects within these materials is crucial for ensuring the safety of corresponding structures.
Da Kang   +5 more
doaj   +1 more source

Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack

open access: yesShock and Vibration, 2014
This study presents a noncontact sensing technique with ultrasonic wave propagation imaging algorithm, for damage visualization of liquid-immersed structures. An aluminum plate specimen (400 mm × 400 mm × 3 mm) with a 12 mm slit was immersed in water and
Jung-Ryul Lee   +2 more
doaj   +1 more source

Abstracts

open access: yesMolecular Oncology, Volume 20, Issue S1, Page 1-692, August 2026.
Abstracts submitted to the ‘EACR 2026 Congress: Innovative Cancer Science’, from 08–11 June 2026 and accepted by the Congress Organising Committee are published in this Supplement of Molecular Oncology, an affiliated journal of the European Association for Cancer Research (EACR).
wiley   +1 more source

Effect of Protective Coating Thickness on Ultrasonic Guided Wave Propagation in Plate‐Like Structures

open access: yesMacromolecular Symposia, Volume 415, Issue 3, June 2026.
ABSTRACT Ultrasonic Guided Waves (UGWs) are widely employed for the inspection and monitoring of plate‐like structures due to their long‐range propagation capability and sensitivity to structural and material changes. In real aerospace components, however, structural surfaces are commonly covered by protective layers, such as coatings or metallic films,
Donato Perfetto   +4 more
wiley   +1 more source

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