Results 21 to 30 of about 147,257 (198)

Analysis of Acoustic Signals During the Optical Breakdown of Aqueous Solutions of Fe Nanoparticles

Frontiers in Physics, 2020
The study investigates the spectra of acoustic signals generating during the optical breakdown of colloidal solutions of iron nanoparticles. A characteristic form of the acoustic spectrum has been experimentally established, a distinctive feature of ...
Ilya V. Baimler, Andrey B. Lisitsyn, Dmitriy A. Serov, Dmitriy A. Serov, Maxim E. Astashev, Maxim E. Astashev, Sergey V. Gudkov   +6 more
doaj   +1 more source

Acoustic properties of La3Ga5.3Ta0.5Al0.2O14 crystal

Modern Electronic Materials, 2015
Development and search for new advanced materials of the lanthanum gallium silicate group with unique thermal properties is of great importance for the development of acoustoelectronics based on volume and surface acoustic waves. The processes of surface
Dmitry V. Roshchupkin, Dmitry V. Irzhak, Eugeny V. Emelin, Sergei A. Sakharov, Alexey N. Zabelin   +4 more
doaj   +1 more source

Energy-Dynamics Resulting in Turbulent and Acoustic Phenomena in an Underexpanded Jet

Aerospace, 2018
Underexpanded jets exhibit interactions between turbulent shear layers and shock-cell trains that yield complex phenomena that are absent in the more commonly studied perfectly expanded jets.
Unnikrishnan Sasidharan Nair, Kalyan Goparaju, Datta Gaitonde   +2 more
doaj   +1 more source

Velocity Estimation of Moving Acoustic Source Based on Acoustic Intensity Interference with Dual Hydrophones in Shallow Water

水下无人系统学报, 2023
Considering the difficulty in estimating the acoustic source motion velocity using an interference striation pattern of a broadband continuum spectrum in a low-frequency analysis and recording(LOFAR) spectrum at a low signal-to-noise ratio(SNR), a moving
Yuan YAO, Chao SUN, Lei XIE, Xionghou LIU   +3 more
doaj   +1 more source

Temperature Dependence Of Brillouin Light Scattering Spectra Of Acoustic Phonons In Silicon [PDF]

, 2015
Electrons, optical phonons, and acoustic phonons are often driven out of local equilibrium in electronic devices or during laser-material interaction processes. The need for a better understanding of such non-equilibrium transport processes has motivated
Annie Weathers, Kevin S. Olsson, Kittel C., Kyongmo An, Li Shi, Nikita Klimovich, Sean Sullivan, Tien C. L., Xiaoqin Li   +8 more
core   +1 more source

Determination of acoustic phonon anharmonicities via second-order Raman scattering in CuI

New Journal of Physics, 2023
We demonstrate the determination of anharmonic acoustic phonon properties via second-order Raman scattering exemplarily on copper iodide single crystals.
R Hildebrandt, M Seifert, J George, S Blaurock, S Botti, H Krautscheid, M Grundmann, C Sturm   +7 more
doaj   +1 more source

Particle mesh simulations of the Lyman-alpha forest and the signature of Baryon Acoustic Oscillations in the intergalactic medium

, 2010
We present a set of ultra-large particle-mesh simulations of the LyA forest targeted at understanding the imprint of baryon acoustic oscillations (BAO) in the inter-galactic medium.
Adrian Pope, Bharadwaj, Croft, Croft, Croft, David Daniel, Efron, Eisenstein, Eisenstein, Eisenstein, Fang, Habib, Heitmann, Heitmann, Hui, Jarosik, Jordan Carlson, Kaiser, Katrin Heitmann, Lidz, Martin White, McDonald, McDonald, McDonald, McDonald, McQuinn, Meiksin, Norman, Patricia Fasel, Percival, Prochaska, Ricotti, Salman Habib, Schlegel, Seo, Seo, Slosar, Sunyaev, Theuns, White, White, Xu, Zaldarriaga, Zaldarriaga, Zarija Lukic, Zuo   +45 more
core   +1 more source

Observation of hypersonic phononic crystal effects in porous silicon superlattices [PDF]

, 2009
Brillouin light scattering experiments were carried out on porous silicon superlattices with modulation wavelengths in the range 37–167 nm. Phonon frequencies deduced from the Brillouin spectra show good agreement with those obtained from an elastic ...
Aliev G., G. T. Andrews, L. C. Parsons
core   +1 more source

A Three-Dimensional Method for Analysis of the Body Mode of Classical Guitars Using a Laser Displacement Sensor

Sensors
In classical guitar acoustic spectra, the lowest frequency body mode’s amplitude often significantly surpasses that of the string overtones. However, the characteristics of the body mode have not been systematically utilized to quantitatively represent ...
Kuan-Cheng Su, Tsung-Yu Hsieh, Wei-Chih Lin, Fu-Li Hsiao, Tatyana Ryzhkova, Chii-Chang Chen   +5 more
doaj   +1 more source

Modelling of Sound Events with Hidden Imbalances Based on Clustering and Separate Sub-Dictionary Learning

, 2019
This paper proposes an effective modelling of sound event spectra with a hidden data-size-imbalance, for improved Acoustic Event Detection (AED). The proposed method models each event as an aggregated representation of a few latent factors, while ...
Komatsu, Tatsuya, Kondo, Reishi, Narisetty, Chaitanya   +2 more
core   +1 more source