Results 31 to 40 of about 79,031 (332)

Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions

open access: yesScientific Reports, 2017
We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs).
Guanghou Sun   +4 more
doaj   +1 more source

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

Extremely Low Loss Phonon-Trapping Cryogenic Acoustic Cavities for Future Physical Experiments [PDF]

open access: yes, 2013
Low loss Bulk Acoustic Wave devices are considered from the point of view of the solid state approach as phonon-confining cavities. We demonstrate effective design of such acoustic cavities with phonon-trapping techniques exhibiting extremely high ...
Abbé, Ph.   +5 more
core   +4 more sources

Acoustic Properties of Amorphous Solids at Very Low Temperatures: The Quest for Interacting Tunneling States [PDF]

open access: yesJournal of Low Temperature Physics, 2004
13 pages, 3 ...
Esquinazi, Pablo   +2 more
openaire   +2 more sources

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

Directivity patterns of laser-generated sound in solids: Effects of optical and thermal parameters [PDF]

open access: yes, 2014
In the present paper, directivity patterns of laser-generated sound in solids are investigated theoretically. Two main approaches to the calculation of directivity patterns of laser-generated sound are discussed for the most important case of thermo ...
Krylov, Victor V.
core   +2 more sources

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

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

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

Acoustical properties of double porosity granular materials [PDF]

open access: yes, 2011
Granular materials have been conventionally used for acoustic treatment due to their sound absorptive and sound insulating properties. An emerging field is the study of the acoustical properties of multiscale porous materials.
Umnova, O, Venegas, R
core   +1 more source

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