Results 31 to 40 of about 2,227,132 (290)

Formation of Scattering Characteristics for Acoustical Ray Tracing Simulation

Archives of Acoustics, 2018
Ray tracing simulation of sound field in rooms is a common tool in room acoustic design for predicting impulse response. There are numerous commercial engineering tools utilising ray tracing simulation. A specific problem in the simulation is the modelling of diffuse reflections when contribution of individual surface is prevailing.
Srđan BOJIČIĆ, Dragana ŠUMARAC-PAVLOVIĆ, Miomir MIJIĆ   +2 more
openaire   +2 more sources

Broadband acoustic pseudospin topological states based on the reverse spin-orbit coupling in generalized insulators

Frontiers in Materials
Acoustic topological insulators have the excellent characteristic of the pseudospin-dependent one-way transmission of sound edge states immune to backscattering.
Chongrui Liu, Yibing Lu, Zhenxin He, Wenliang Guan, Zhen Huang   +4 more
doaj   +1 more source

PREDOMINANT TRAVELING IONOSPHERIC DISTURBANCES OVER EASTERN EUROPE DURING LOW LEVELS OF SOLAR AND GEOMAGNETIC ACTIVITIES USING INCOHERENT SCATTER RADAR DATA [PDF]

Radio Physics and Radio Astronomy, 2020
Purpose: Detection of wave processes of various temporal and spatial scales in the mid-latitude ionosphere over the Eastern Europe near the characteristic geophysical time periods (equinoxes and solstices) during magnetically quiet and weakly disturbed ...
K. D. Aksonova, S. V. Panasenko
doaj   +1 more source

Modified Green's Functions for Shallow Water Acoustic Wave Propagation [PDF]

, 2004
This article presents an assessment of alternative forms of the Green’s function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-
Santiago, J A F S, Wrobel, L C
core   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Excitation of monochromatic and stable electron acoustic wave by two counter-propagating laser beams

New Journal of Physics, 2017
The undamped electron acoustic wave is a newly-observed nonlinear electrostatic plasma wave and has potential applications in ion acceleration, laser amplification and diagnostics due to its unique frequency range. We propose to make the first attempt to
C Z Xiao, Z J Liu, C Y Zheng, X T He
doaj   +1 more source

Computing coherent phonon lifetimes in layered acoustic cavities [PDF]

JASA Express Letters
The confinement of coherent phonons in acoustic cavities can lead to ultrahigh-frequency resonators and may tap into the quantum nature of phonons. Their practicality is linked to the coherent phonon lifetime or the characteristic time scale for the ...
Jesus Alejandro Avendano Bolivar, Kevin Brenner   +1 more
doaj   +1 more source

OntOMat: Toward Ontology‐Based Product and Process Design Engineering and Optimization Solutions Fueling Circular Value Chains

Advanced Engineering Materials, EarlyView.
The OntOMat ontology establishes a structured framework for polymer matrix fiber reinforced composite materials, integrating manufacturing processes, characterization methods, and multiscale design through the VDI/VDE 3682 formalized process description standard.
Nicolas Christ, Jörg Hohe, Martin Kördel, Michael Giese, Niklas Toffert, Christian Seidel, Olaf Rehme, Patrik Schneider, Oliver Focke, Elie Abi Aoun, Claas Falldorf, Beñat Gutierrez, Alexandra Kühn, Sven Torstrick-von der Lieth, Christoph Herden, Erik Johannsen, Jan‐Uwe R. Schmidt, Felix Winkelmann, Andreas Schott, Daniel Schott   +19 more
wiley   +1 more source

Low frequency 3D transmission ultrasound tomography: technical details and clinical implications

Zeitschrift für Medizinische Physik, 2023
A novel 3D ultrasound tomographic (3D UT) method (called volography) that creates a speed of sound (SOS) map and a reflection modality that is co-registered are reviewed and shown to be artifact free even in the presence of high contrast and thus shown ...
James Wiskin, Bilal Malik, John Klock
doaj   +1 more source

Analytic mode-matching for acoustic scattering in three dimensional waveguides with flexible walls: Application to a triangular duct [PDF]

, 2012
This is the post-print version of the Article. The official published version can be accessed from the links below - Copyright @ 2012 ElsevierAn analytic mode-matching method suitable for the solution of problems involving scattering in three-dimensional
Lawrie, JB
core   +1 more source