Search Results - "Dacol, D."

Pulse propagation in randomly fluctuating media by Dacol, D K

“…Pulse propagation in a weakly and randomly inhomogeneous medium is studied using a time-domain progressive wave equation. An eikonal-like approximated solution…”
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Sensitivity to array tilt and bow for broadband geoacoustic inversion using a towed array by Yoo, K., Yang, T. C., Fialkowski, L., Dacol, D., Perkins, John, Fallat, M., Nielsen, P., Siderius, M.

“…During the MAPEX 2000 experiment, broadband acoustic data from an acoustic source were received on a towed array, both towed by the same ship with the…”
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A mapping approach for handling sloping interfaces by Collins, MD, Dacol, DK

“…A mapping approach for handling sloping interfaces in parabolic equation solutions is developed and tested. At each range, the medium is rigidly translated…”
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A wide angle and high Mach number parabolic equation by Lingevitch, Joseph F, Collins, Michael D, Dacol, Dalcio K, Drob, Douglas P, Rogers, Joel C W, Siegmann, William L

“…Various parabolic equations for advected acoustic waves have been derived based on the assumptions of small Mach number and narrow propagation angles, which…”
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A higher-order on-surface radiation condition derived from an analytic representation of a Dirichlet-to-Neumann map by Calvo, D.C., Collins, M.D., Dacol, D.K.

“…On-surface radiation conditions are useful for obtaining approximate solutions to scattering problems involving compact obstacles. An analytic representation…”
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Sound scattering from a randomly rough fluid-solid interface by DACOL, D. K, BERMAN, D. H

“…A general formalism for acoustic scattering from a fluid–elastic solid interface is developed. The theory parallels Waterman’s work [P. C. Waterman, J. Acoust…”
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The Kirchhoff approximation for acoustic scattering from a rough fluid-elastic solid interface by DACOL, D. K

“…The Kirchhoff approximation for wave scattering from a penetrable surface is applied to the case of acoustic scattering from a rough fluid–elastic solid…”
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Geoacoustic inversion using a rotated coordinate system and simulated annealing by Fialkowski, L.T., Lingevitch, J.F., Perkins, J.S., Dacol, D.K., Collins, M.D.

“…An efficient method for geoacoustic inversions in a range-dependent ocean waveguide is implemented and tested with synthetic data. This method combines a…”
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Manifestly reciprocal scattering amplitudes for rough interface scattering by BERMAN, D. H, DACOL, D. K

“…A new exact expression for scattering amplitudes for rough interface scattering is presented. This expression is shown to hold for a variety of boundary…”
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Coupled-amplitude approach to solving the Helmholtz equation by Dacol, Dalcio K.

“…The coupled-amplitude technique for solving the Helmholtz equation has been developed in the context of coupled normal modes by researchers working in a…”
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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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Sensitivity Analysis in Chemical Kinetics by Rabitz, H, Kramer, M, Dacol, D

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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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Rapid geoacoustic inversion with a curved horizontal array by Fialkowski, Laurie T., Dacol, Dalcio K., Lingevitch, Joseph F., Kim, Elisabeth

“…Real-time geoacoustic inversions with a towed array are of interest for rapidly characterizing the sediment properties over changing regions, and require an…”
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Surface-wave scattering by isotopic impurities in solids by Dacol, D. K., Zimerman, A. H.

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An efficient parabolic equation solution based on the method of undetermined coefficients by Dacol, Dalcio K., Collins, Michael D., Lingevitch, Joseph F.

“…An implementation of the self-starter based on the method of undetermined coefficients is described and tested. For many problems, this parabolic equation…”
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Generalized optical theorem for scattering in inhomogeneous media by Dacol, Dalcio K, Roy, Dilip G

“…The scattering of scalar waves by objects embedded in an inhomogeneous medium contained by a bounded volume is discussed using the method of pseudopotentials…”
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Low-temperature critical phenomena in the spin-1/2 planar ferromagnet by Dacol, Dalcio K.

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