Sixteen-year variation of horizontal phase velocity and propagation direction of mesospheric and thermospheric waves in airglow images at Shigaraki, Japan†
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Geophysical Research"
DOI: 10.1002/2017ja023919
Abstract: We analyzed the horizontal phase velocity of gravity waves and medium-scale traveling ionospheric disturbances (MSTIDs) by using the three-dimensional fast Fourier transform method developed by Matsuda et al. [2014] for 557.7-nm (altitude: 90–100 km) and 630.0-nm (altitude:… read more here.
Keywords: propagation; phase velocity; horizontal phase; propagation direction ... See more keywords
Modal phase velocity compensation in multilayer differentially fed directional couplers
Sign Up to like & getrecommendations! Published in 2020 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32252
Abstract: In this article, we present for the first time the possibility of the modal phase velocity compensation in differentially fed directional couplers designed in inhomogeneous dielectric media. It is shown that in an appropriate, inhomogeneous… read more here.
Keywords: differentially fed; fed directional; velocity compensation; phase velocity ... See more keywords
Estimation of the Lamb wave phase velocity dispersion curves using only two adjacent signals
Sign Up to like & getrecommendations! Published in 2020 at "Composite Structures"
DOI: 10.1016/j.compstruct.2020.113174
Abstract: Abstract Lamb waves are used in various non-destructive testing (NDT) and structural health monitoring (SHM) applications due to their velocity sensitivity to the properties of the material and their propagation over the entire thickness of… read more here.
Keywords: velocity; velocity dispersion; phase velocity; dispersion ... See more keywords
Short-period surface-wave phase velocities across the conterminous United States
Sign Up to like & getrecommendations! Published in 2017 at "Physics of the Earth and Planetary Interiors"
DOI: 10.1016/j.pepi.2017.07.010
Abstract: Abstract Surface-wave phase-velocity maps for the full footprint of the USArray Transportable Array (TA) across the conterminous United States are developed and tested. Three-component, long-period continuous seismograms recorded on more than 1800 seismometers, most of… read more here.
Keywords: across conterminous; phase; surface wave; conterminous united ... See more keywords
Love wave phase velocity models of the southeastern margin of Tibetan Plateau from a dense seismic array
Sign Up to like & getrecommendations! Published in 2017 at "Tectonophysics"
DOI: 10.1016/j.tecto.2017.05.013
Abstract: Abstract Love wave dispersion maps across the southeastern margin of the Tibetan Plateau are obtained using earthquake data recorded by the temporary ChinArray and permanent China Digital Seismic Array. Fundamental mode Love wave phase velocity… read more here.
Keywords: phase; phase velocity; tibetan plateau; margin tibetan ... See more keywords
Near-zero effective impedance with finite phase velocity for sensing and actuation enhancement by resonator pairing
Sign Up to like & getrecommendations! Published in 2018 at "Nature Communications"
DOI: 10.1038/s41467-018-07697-7
Abstract: In spite of the extensive studies of zero-index metamaterials, the realization of zero impedance with finite phase velocity has not been explored. Here, we show that this extreme case, realized by elaborately-tuned paired resonators, can… read more here.
Keywords: sensing actuation; impedance finite; finite phase; phase velocity ... See more keywords
The effect of the tortuosity of fluid phases on the phase velocity of Rayleigh wave in unsaturated porothermoelastic media
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Thermal Stresses"
DOI: 10.1080/01495739.2020.1748554
Abstract: Abstract Based on the frame of elastic theory for unsaturated porous medium, considering the influence of the thermal effect, the effects of the tortuosity of fluid phases on the phase velocity of Rayleigh wave in… read more here.
Keywords: tortuosity; velocity rayleigh; rayleigh wave; phase velocity ... See more keywords
Reversal of laser wake phase velocity generates high-power broadband Cherenkov signal
Sign Up to like & getrecommendations! Published in 2021 at "Plasma Physics and Controlled Fusion"
DOI: 10.1088/1361-6587/abe83c
Abstract: As a femtosecond terawatt laser pulse propagates along a positive density gradient within a stratified plasma column, it drives a low-frequency electromagnetic wake wave, the period of electron fluid oscillations in the wake gradually shrinking.… read more here.
Keywords: power; phase velocity; wake; emission ... See more keywords
A single Rayleigh mode may exist with multiple values of phase-velocity at one frequency
Sign Up to like & getrecommendations! Published in 2020 at "Geophysical Journal International"
DOI: 10.1093/gji/ggaa123
Abstract: Other than commonly assumed in seismology, the phase velocity of Rayleigh waves is not necessarily a single-valued function of frequency. In fact, a single Rayleigh mode can exist with three different values of phase velocity… read more here.
Keywords: frequency; velocity; phase velocity; single rayleigh ... See more keywords
Phase irregularity: A conceptually simple and efficient approach to characterize electroencephalographic recordings from epilepsy patients.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.034212
Abstract: The severe neurological disorder epilepsy affects almost 1% of the world population. For patients who suffer from pharmacoresistant focal-onset epilepsy, electroencephalographic (EEG) recordings are essential for the localization of the brain area where seizures start.… read more here.
Keywords: irregularity; epilepsy; phase coherence; phase ... See more keywords
Shear wave phase velocity dispersion estimation in viscoelastic materials using the Multiple Signal Classification method
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.4988145
Abstract: Shear wave elastography (SWE) is clinically used for the measurement of soft tissue mechanical properties. Most SWE methods assume that the tissue is elastic, but soft tissues are inherently viscoelastic. The viscoelasticity can be characterized… read more here.
Keywords: velocity dispersion; method; phase velocity;