Results 31 to 40 of about 77,806 (312)

Design of interdigitated transducers for acoustofluidic applications

open access: yesNanotechnology and Precision Engineering, 2022
Interdigitated transducers (IDTs) were originally designed as delay lines for radars. Half a century later, they have found new life as actuators for microfluidic systems.
Shuren Song   +3 more
doaj   +1 more source

Identification of suspension state using passive acoustic emission and machine learning in a solid–liquid mixing system

open access: yesChemical Engineering Research and Design, 2022
Abstract Solid–liquid mixing is a core operation in many manufacturing processes in the food, cosmetics, pharmaceutical and chemical industries. This work aims to develop an accurate and reliable sensing methodology using passive acoustic emission (PAE) coupled with supervised machine learning (ML) algorithms, to allow identifying and predicting ...
Alberto Rossi   +2 more
openaire   +1 more source

45th Winter School on Wave and Quantum Acoustics and XLIVth Winter School on Environmental Acoustics and Vibroacoustics

open access: yesArchives of Acoustics, 2016
On behalf of Upper Silesian Division of the Polish Acoustical Society (main organizer) and Committee of Acoustics of the Polish Academy of Sciences (co-organizer) we are pleased to announce that it is nearing the end of preparations for the conduct ...
45th Winter School on WQA; XLIVth Winter School on EA&V
doaj   +1 more source

Room-temperature photosynthesis of propane from CO2 with Cu single atoms on vacancy-rich TiO2

open access: yesNature Communications, 2023
A photocatalyst for CO2 reduction to C3H8 is prepared by implanting Cu single atoms on vacancy rich TiO2 single layers. Key reaction intermediates, *CHOCO and *CH2OCOCO, are stabilized on the catalyst which promotes C-C bond formation.
Yan Shen   +14 more
doaj   +1 more source

Magnetic phase transitions in Gd64Sc36 studied using non-contact ultrasonics [PDF]

open access: yes, 2012
The speed and attenuation of ultrasound propagation can be used to determine material properties and identify phase transitions. Standard ultrasonic contact techniques are not always convenient due to the necessity of using couplant; however, recently ...
Andrianov A B   +17 more
core   +2 more sources

Bidirectional acoustic negative refraction based on a pair of metasurfaces with both local and global PT-symmetries

open access: yesScientific Reports, 2020
Negative refraction plays an important role in acoustic wave manipulation and imaging. However, conventional systems based on acoustic metamaterials suffer from the limits induced by loss-related and resolution issues.
Jun Lan   +4 more
doaj   +1 more source

Shannon Entropy as Characterization Tool in Acoustics

open access: yes, 2007
We introduce Shannon's information entropy to characterize the avoided crossing appearing in the resonant Zener-like phenomenon in ultrasonic superlattices made of two different fluidlike meta- materials.
Sanchez-Dehesa, Jose   +1 more
core   +1 more source

Reduced-order modeling and dynamics of nonlinear acoustic waves in a combustion chamber [PDF]

open access: yes, 2005
For understanding the fundamental properties of unsteady motions in combustion chambers, and for applications of active feedback control, reduced-order models occupy a uniquely important position. A framework exists for transforming the representation of
Ananthkrishnan, N.   +2 more
core   +1 more source

A review of the state of art in applying Biot theory to acoustic propagation through the bone [PDF]

open access: yes, 2014
Understanding the propagation of acoustic waves through a liquid-perfused porous solid framework such as cancellous bone is an important pre-requisite to improve the diagnosis of osteoporosis by ultrasound.
Aygun, Haydar
core   +1 more source

Broadband second harmonic generation in aperiodic nonlinear photonic crystals: 1D projection from 2D Vogel sunflower spiral array

open access: yesAIP Advances, 2021
The structure of the sunflower head can be used to realize broadband applications in optics. However, this 2D structure, with a ring-shaped reciprocal space, only has a normalized Fourier coefficient peak around 0.033, which leads to a relatively low ...
Nian-Mu Wang, Huang Huang, Chao Zhang
doaj   +1 more source

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