Results 71 to 80 of about 147,257 (198)

Acoustic oscillations in stars near the tip of the red giant branch

, 2010
Small amplitude oscillations are observed in red giant branch (RGB) stars. Data on such oscillations are a source of information about the objects, notably about properties of convection in their envelopes and about the systems these objects inhabit. The
Bedding, De Ridder, Dupret, Dziembowski, Dziembowski, Fraser, Fraser, I. Soszyński, Ita, Ita, Kiss, Kiss, Kjeldsen, Mosser, Nicholls, Paczyński, Pietrinferni, Salaris, Samadi, Schaefer, Soszyński, Soszyński, Soszyński, Stello, Stello, Tabur, W. A. Dziembowski, Wood, Wood, Wray, Xiong   +30 more
core   +1 more source

Acoustic Investigation of the Structure of Magneto-Rheological Fluid

Communications, 2017
The acoustic spectroscopy is used to study properties and changes in structural arrangement in silicone oil based magneto-rheological fluids with carbonyl iron particles upon the effect of an external magnetic field.
Jozef Kudelcik, Peter Bury, Stefan Hardon, Michal Sedlacik, Tomas Plachy   +4 more
doaj   +1 more source

Structure, mechanical properties and acoustic emissions of starch extrudates [PDF]

, 2008
Imperial Users ...
Plews, Andrew G., Plews, Andrew G.
core  

Tensions between direct measurements of the lens power spectrum from Planck data

, 2018
We apply a recently developed method to directly measure the gravitational lensing power spectrum from CMB power spectra to the Planck satellite data.
Hu, Wayne, Motloch, Pavel
core   +1 more source

Electrically Tunable Multiwavelength Bragg Grating Filter Acoustically Induced in a Highly Birefringent Suspended Core Fiber

IEEE Photonics Journal, 2017
Multiwavelength reflection spectra induced by an acoustically modulated fiber Bragg grating (FBG) in a highly birefringent suspended core fiber are experimentally investigated. Longitudinal acoustic waves interacting with a grating generate side lobes in
Ricardo E. Silva, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Alexandre A. P. Pohl   +4 more
doaj   +1 more source

An experimental study of the properties of surface pressure fluctuations in strong adverse pressure gradient turbulent boundary layers [PDF]

Experimental data were obtained on blade self-noise generation by strong adverse-pressure-gradient attached boundary layers and by separated turbulent boundary layers that accompany stall.
Simpson, R. L.
core   +1 more source

Hydrodynamic acoustic plasmon resonances in semiconductor nanowires and their dimers

, 2019
The hydrodynamic Drude model known from metal plasmonics also applies to semiconductor structures of sizes in between single-particle quantum confinement and bulk.
Golestanizadeh, Tahereh, Jalali, Tahmineh, Maack, Johan R., Wubs, Martijn, Zarifi, Abbas   +4 more
core   +1 more source

Helicopter rotor noise due to ingestion of atmospheric turbulence [PDF]

A theoretical study was conducted to develop an analytical prediction method for helicopter main rotor noise due to the ingestion of atmospheric turbulence.
Amiet, R. K., Greitzer, E. M., Schlinker, R. H., Simonich, J. C.   +3 more
core   +1 more source

ON CALCULATION OF VIBRATION AND NOISE SPECTRA IN PROCESSING BOX BODIES WITH BALL-POINT REINFORCER

Вестник Донского государственного технического университета, 2018
Calculation of the vibration and noise spectra in processing box bodies with the ball-point reinforcer and theoretical research results of vibro-acoustic performance of this kind of treatment are presented.
Andrey N. LESHCHENKO
doaj  

Distribution of Acoustic Power Spectra for an Isolated Helicopter Fuselage

EPJ Web of Conferences, 2016
The broadband aerodynamic noise can be studied, assuming isotropic flow, turbulence and decay. Proudman’s approach allows practical calculations of noise based on CFD solutions of RANS or URANS equations at the stage of post processing and analysis of ...
Kusyumov A.N., Mikhailov S.A., Garipova L.I., Batrakov A.S., Barakos G.   +4 more
doaj   +1 more source