Search Results - "Orris, G J"

Collective oscillations of fresh and salt water bubble plumes by Orris, GJ, Nicholas, M

“…Bubble plumes of various void fractions and sizes were produced by varying the flow velocity of a water jet impinging normally on a water surface. The bubbles…”
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The matched-phase coherent multi-frequency matched-field processor by Orris, GJ, Nicholas, M, Perkins, JS

“…Coherent multi-frequency matched-field processing is investigated using a matched-phase coherent matched-field processor. Its main difference from previous…”
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Application of the Foldy–Wouthuysen transformation to the reduced wave equation in range-dependent environments by Wurmser, Daniel, Orris, Gregory J., Dashen, Roger

“…The Foldy–Wouthuysen transformation can be used to reduce the relativistic Klein–Gordon equation to the nonrelativistic Schrödinger equation. This technique is…”
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Acoustical scattering by multilayer spherical elastic scatterer containing electrorheological layer by CAI, Liang-Wu, DACOL, Dacio K, ORRIS, Gregory J, CALVO, David C, NICHOLAS, Michael

“…A computational procedure for analyzing acoustical scattering by multilayer concentric spherical scatterers having an arbitrary mixture of acoustic and elastic…”
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Macroscopic sonic crystals in a wave guide by Dacol, D K, Orris, G J, Calvo, D C

“…Periodical arrays of long, parallel cylinders have been shown in the published literature to exhibit acoustical properties which are analogous to the…”
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Measurements of the attenuation and phase velocities in bubbly fresh and salt water by Nicholas, Michael, Orris, Gregory J.

“…Several types of bubblers have been used to create a dense bubble cloud that fills a 44-m3 tank, wherein phase velocity and attenuation measurements have been…”
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Bubble acoustics near surfaces by Dacol, Dalcio K., Orris, Gregory J.

“…Boundary effects were included in Foldy’s effective medium theory of acoustic propagation in a bubbly fluid. This allowed for the discussion of bubble effects…”
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Signal propagation and the dispersion relations of bubbly water by Orris, Gregory J., Nicholas, Michael, Dacol, Dalcio

“…The physics behind the extreme variations of the phase velocity of acoustic wave propagation in a bubbly liquid as a function of frequency have been addressed…”
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Renormalization group analysis of rough surface scattering by Orris, G. J., Dashen, R. F.

“…An acoustic field of wavelength much larger than the largest scale of a scattering body is considered. A renormalization group equation has been developed to…”
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Environmental inversion and matched-field tracking with a surface ship and an L-shaped receiver array by NICHOLAS, Michael, PERKINS, John S, ORRIS, Gregory J, FIALKOWSKI, Laurie T, HEARD, Garry J

“…Acoustic data from the natural broadband signature of a quiet surface ship, recorded on the vertical leg of an L-shaped array, is used to invert for the local…”
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The spectral parabolic equation and three-dimensional backscattering by Orris, Gregory J., Collins, Michael D.

“…Problems involving dependence of the acoustic parameters in depth and one of the horizontal Cartesian coordinates are solved using the cross-range wave-number…”
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Bubble plume echoes from convergence zone ranges by McDonald, B. E., Orris, G. J., Collins, Michael D.

“…Surface reverberation from bubble plumes at long ranges (one or two convergence zones) is modeled by combining a Born approximation scatter model [McDonald, J…”
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Phase-matching filter techniques for low signal-to-noise data by Orris, G. J., McDonald, B. E., Kuperman, W. A.

“…A digital filter is being developed for use in low signal-to-noise situations where the shape of the noise spectrum is known apriori. Candidate noise signals…”
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Spectral parabolic equation solutions of three-dimensional problems involving horizontal coupling and backscattering by Orris, G. J., Collins, Michael D., Kuperman, W. A.

“…The parabolic equation (PE) method and separation of variables are applied to solve problems in which the ocean-acoustic parameters are independent of one of…”
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A Born scatterer in an acoustical waveguide by Roy, D N Ghosh, Orris, Gregory J

“…Scattering from a Born inhomogeneity in a homogeneous, acoustical waveguide is considered and results compared to the corresponding scattering in a…”
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Matched-phase noise reduction by Orris, Gregory J., McDonald, B. E., Kuperman, W. A.

“…A simple method is presented for improving signal-to-noise ratios in noise dominated data, given the shape of the noise spectrum. No a priori information about…”
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Performance of the Matched-Phase Noise Filter with Estimated Noise Spectra by McDonald, B.E., Orbis, Gregory J.

“…We demonstrate properties of a new type of noise filter, the matched-phase filter, for low signal-to-noise data. It requires that the shape of the noise…”
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