Results 21 to 30 of about 191,841 (293)

Noise generation in the solid Earth, oceans, and atmosphere, from non-linear interacting surface gravity waves in finite depth [PDF]

open access: yes, 2012
Oceanic pressure measurements, even in very deep water, and atmospheric pressure or seismic records, from anywhere on Earth, contain noise with dominant periods between 3 and 10 seconds, that is believed to be excited by ocean surface gravity waves. Most
Ardhuin, Fabrice, Herbers, Thomas H. C.
core   +4 more sources

Acoustic wave propagation in the solar sub-photosphere with localised magnetic field concentration: effect of magnetic tension [PDF]

open access: yes, 2009
Aims: We analyse numerically the propagation and dispersion of acoustic waves in the solar-like sub-photosphere with localised non-uniform magnetic field concentrations, mimicking sunspots with various representative magnetic field configurations ...
Cally   +31 more
core   +2 more sources

Acoustofluidics 17: theory and applications of surface acoustic wave devices for particle manipulation [PDF]

open access: yes, 2012
In this paper, number 17 of the thematic tutorial series “Acoustofluidics – exploiting ultrasonic standing waves, forces and acoustic streaming in microfluidic systems for cell and particle manipulation” – we present the theory of surface acoustic waves (
Gedge, Michael, Hill, Martyn
core   +1 more source

Bending and splitting of spoof surface acoustic waves through structured rigid surface

open access: yesResults in Physics, 2018
In this paper, we demonstrated that a 90°-bended imaging of spoof surface acoustic waves with subwavelength resolution of 0.316λ can be realized by a 45° prism-shaped surface phononic crystal (SPC), which is composed of borehole arrays with square ...
Sujun Xie   +5 more
doaj   +1 more source

Surface Acoustic Wave Induced Heat Knockdown of Caenorhabditis Elegans

open access: yesHittite Journal of Science and Engineering, 2021
Model organisms such as Caenorhabditis elegans are commonly used in discovering theunderlying mechanisms of human diseases. The field of microfluidics enables a plethora of tools for better studying these organisms.
Adem Özçelik
doaj   +1 more source

Liquid-assisted tunable metasurface for simultaneous manipulation of surface elastic and acoustic waves

open access: yesAIP Advances, 2018
A tunable and multi-functional one-dimensional metasurface, which is formed by engraving periodic semi-ellipse grooves on the surface of an aluminum half-space, is proposed in this paper. One characteristic of the metasurface is the manipulation of multi-
Si-Min Yuan   +3 more
doaj   +1 more source

Chiral Magnetoacoustics

open access: yesFrontiers in Physics, 2022
Nonreciprocal microwave devices are key components of communication platforms. Nonreciprocity can arise in chiral systems, where chirality refers to a fixed handedness that is preserved under time reversal.
Matthias Küß   +2 more
doaj   +1 more source

Simultaneous Guidance of Surface Acoustic and Surface Optical Waves in Phoxonic Crystal Slabs

open access: yesCrystals, 2017
Phoxonic crystals, which exhibit simultaneous phononic and photonic bandgaps, are promising artificial materials for optomechanical and acousto-optical devices.
Tian-Xue Ma   +2 more
doaj   +1 more source

Large-scale numerical modeling of hydro-acoustic waves generated by tsunamigenic earthquakes [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2015
Tsunamigenic fast movements of the seabed generate pressure waves in weakly compressible seawater, namely hydro-acoustic waves, which travel at the sound celerity in water (about 1500 m s−1).
C. Cecioni   +3 more
doaj   +1 more source

Reverse Doppler effect in backward spin waves scattered on acoustic waves

open access: yes, 2009
We report on the observation of reverse Doppler effect in backward spin waves reflected off of surface acoustic waves. The spin waves are excited in a yttrium iron garnet (YIG) film. Simultaneously, acoustic waves are also generated.
A. A. Serga   +12 more
core   +1 more source

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