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Meshless techniques for anisotropic diffusion

Annamaria Mazzia, Giorgio Pini, Flavio Sartoretto
2014 Applied Mathematics and Computation  
Our objective is to simulate transport processes over very long time periods, as needed in, e.g., the simulation of geologic carbon sequestration.  ...  A good numerical method would be locally mass conservative, produce no or minimal over/under-shoots, produce minimal numerical diffusion, and require no CFL time-step limit for stability.  ...  We present complex scenarios of multicomponent reactive transport in 2-D and in 3-D. These scenarios are further developments of the setting given by the MoMaS benchmark.  ... 
doi:10.1016/j.amc.2014.03.032 fatcat:c527226gyfgbffnq4p67qxd7wi

ABBREVIATIONS

2002 GeoArabia  
The need for improved seismic imaging has led to increased channel counts, which, in turn, have called for the deployment and maintenance of as many as 420,000 geophones by a single seismic crew.  ...  Reduction of the latter is often described by the square root theory, which predicts attenuation proportional to the square root of the number of receivers. This theory assumes that noise is random.  ...  The fault zones were characterized by integrating image logs, multicomponent induction logs, and conventional log data.  ... 
doi:10.2113/geoarabia0702187 fatcat:mtcvtit3lzbkbijpzyqwgzkfcm

A coupled bispectral, temporal and spatial coherence function of the pressure field, scattered from a moving sea surface

Christian Bjerrum‐Niese, Leif Bjo/rno/
1995 Journal of the Acoustical Society of America  
methods of measurement and test, and terminology in the fields of mechanical shock and physiological acoustics, including aspects of general acoustics, shock, and vibration which pertain to biological  ...  Working group chairs will report on their preparation of standards on methods of measurement and testing, and terminology, in physical acoustics, electro-acoustics, sonics, ultrasonics, and underwater  ...  Efficient computation of sound field in horizontally stratified media using a WKB-type approximation with Airy functions. Y.L. Li (Dept. of Elec. and Comput.  ... 
doi:10.1121/1.414267 fatcat:gtdrkztuvfbova3a4rdj2f7umu

Acoustical measurements on stages of nine U.S. concert halls

A. C. Gade, John S. Bradley
1993 Journal of the Acoustical Society of America  
The manikin was used to record impulse responses in eight northeastern United States concert halls as part of the recent Concert Hall Research Group Study. The placement of the manikin's l/2-in.  ...  These results are compared on a sot-by-seat basis and the differences are explained in terms of earlier systematic studies of the effects of measurement procedure details.  ...  The ocean environment is assumed to be two dimensional: An infinitely long inhomogeneity is imbedded in or penetrating the bottom of an otherwise horizontally stratified ocean.  ... 
doi:10.1121/1.406640 fatcat:omothtjqojcofd5ypx2oubadsy

Effects of measurement procedure and equipment on average room acoustic measurements

A. C. Gade, John S. Bradley, Gary W. Siebein
1993 Journal of the Acoustical Society of America  
The manikin was used to record impulse responses in eight northeastern United States concert halls as part of the recent Concert Hall Research Group Study. The placement of the manikin's l/2-in.  ...  These results are compared on a sot-by-seat basis and the differences are explained in terms of earlier systematic studies of the effects of measurement procedure details.  ...  The ocean environment is assumed to be two dimensional: An infinitely long inhomogeneity is imbedded in or penetrating the bottom of an otherwise horizontally stratified ocean.  ... 
doi:10.1121/1.406634 fatcat:rah72seo75gtpgirf4x2ngcg24

Statistical relations among architectural features and objective acoustical measurements of concert halls

Gary W. Siebein, Wei‐hwa Chiang, Gary S. Madaras, Harold W. Doddington, Wilhelm K. Schwab, John S. Bradley, A. C. Gade
1993 Journal of the Acoustical Society of America  
The manikin was used to record impulse responses in eight northeastern United States concert halls as part of the recent Concert Hall Research Group Study. The placement of the manikin's l/2-in.  ...  These results are compared on a sot-by-seat basis and the differences are explained in terms of earlier systematic studies of the effects of measurement procedure details.  ...  The ocean environment is assumed to be two dimensional: An infinitely long inhomogeneity is imbedded in or penetrating the bottom of an otherwise horizontally stratified ocean.  ... 
doi:10.1121/1.406641 fatcat:2ulfax5x7rg3nogxaiinu4epfe

Comparisons of auditorium acoustics measurements as a function of location in halls

John S. Bradley, A. C. Gade, Gary W. Siebein
1993 Journal of the Acoustical Society of America  
The manikin was used to record impulse responses in eight northeastern United States concert halls as part of the recent Concert Hall Research Group Study. The placement of the manikin's l/2-in.  ...  These results are compared on a sot-by-seat basis and the differences are explained in terms of earlier systematic studies of the effects of measurement procedure details.  ...  The ocean environment is assumed to be two dimensional: An infinitely long inhomogeneity is imbedded in or penetrating the bottom of an otherwise horizontally stratified ocean.  ... 
doi:10.1121/1.406637 fatcat:qm3xseekvjgtpaucjdpbkm3o2y

Temporal integration of loudness as a function of level

Mary Florentine, So/ren Buus, Torben Poulsen
1995 Journal of the Acoustical Society of America  
Tappert (Univ. of Miami, Miami, FL 33149) Full-wave numerical simulations of internal wave scattering of lowfrequency sound in the deep ocean are performed with an efficient broadband PE model based on  ...  Unfortunately, recent measurements and numerical simulations suggest that these modes are susceptible to internal wave-induced mode coupling---especially at long range.  ...  Thus reaching this fourth angle is too much costly in deformation amplitude and thus poorly efficient. 5pSC24. Does the perceptual magnet effect hold for the [•] category?  ... 
doi:10.1121/1.411567 fatcat:h52442zdrnc6zmr4ephlixbspu

Application of the PE method to up‐slope sound propagation

Marta Galindo, Karsten Bo Rasmussen
1995 Journal of the Acoustical Society of America  
Tappert (Univ. of Miami, Miami, FL 33149) Full-wave numerical simulations of internal wave scattering of lowfrequency sound in the deep ocean are performed with an efficient broadband PE model based on  ...  Unfortunately, recent measurements and numerical simulations suggest that these modes are susceptible to internal wave-induced mode coupling---especially at long range.  ...  Thus reaching this fourth angle is too much costly in deformation amplitude and thus poorly efficient. 5pSC24. Does the perceptual magnet effect hold for the [•] category?  ... 
doi:10.1121/1.411728 fatcat:bvxtg4xt7zcljo4rpxldvug444

Temporal integration of loudness as a function of level

Mary Florentine, So/ren Buus, Torben Poulsen
1996 Journal of the Acoustical Society of America  
Tappert (Univ. of Miami, Miami, FL 33149) Full-wave numerical simulations of internal wave scattering of lowfrequency sound in the deep ocean are performed with an efficient broadband PE model based on  ...  Unfortunately, recent measurements and numerical simulations suggest that these modes are susceptible to internal wave-induced mode coupling---especially at long range.  ...  Thus reaching this fourth angle is too much costly in deformation amplitude and thus poorly efficient. 5pSC24. Does the perceptual magnet effect hold for the [•] category?  ... 
doi:10.1121/1.415236 pmid:8819858 fatcat:tsiit3akb5e4tkzxdzrilpsfzy

Electroacoustical simulation of listening room acoustics for project ARCHIMEDES

Søren Bech
1989 Journal of the Acoustical Society of America  
The latter are excited by phase matching of the incident ray field to the traveling wave modes in the shell, and they reach the observer by phase matched detachment [ see, also, P. L. Marston , J.  ...  The spatiotemporal distribution of early reflections is captured for a given source/listener orientation: The gain, delay, and directional filtering of simulated reflections are responsive to changes in  ...  for two-dimensional acoustic propagation in laterally inhomogenous and simultaneously vertically stratified medium.  ... 
doi:10.1121/1.2027447 fatcat:7muohki2i5gktltdx2dhsiumze

Objective evaluation of vowel pronunciation

Mark J. Bakkum, Reinier Plomp, Louis C. W. Pols
1991 Journal of the Acoustical Society of America  
A simple propagation model is presented, based on bottom-reflection coefficients, that indicates one should expect strict mode propagation and sharp cutoffs in a horizontally stratified environment having  ...  By using sediment velocities (estimated by an inversion method), known sediment porosity, and pure hydrate velocity, the amount of hydrate in the highest velocity and most intensively blanked sediments  ...  Plans for the next meetings of ISO/TC43 (in Australia in December 1991 ), and for IEC/TC 29 (in New Zealand, from 25-29 November 1991 } will be discussed.  ... 
doi:10.1121/1.2029328 fatcat:qntsmkrqkjbkpaxn35nuxutuaa

On the relations among temporal integration for loudness, loudness discrimination, and the form of the loudness function

So/ren Buus, Mary Florentine, Torben Poulsen
1996 Journal of the Acoustical Society of America  
One can then predict the energy distribution within the structure by using the method of normal mode expansion for Rattle noise is directly tied to customers' perceptions of product quality.  ...  The acoustic response of head protectors was assessed by means of a mecano-acoustic head simulator.  ...  We detected no response in a high percentage of nesting and roosting eagles exposed to numerous types of noise at varying levels of intensity.  ... 
doi:10.1121/1.415616 fatcat:o3peikxywvgrtccqqlvwx55j3y

Low‐frequency pressure wave propagation in liquid‐filled, flexible tubes

Cato Bjelland, Leif Bjo/rno/
1992 Journal of the Acoustical Society of America  
This mode of oscillation [see papers by Prosperetti and by Carey and Browning in Sea Surface Sound, edited by B. R.  ...  Methods are reviewed by which acoustic measurements of breaking may prove useful in indirect measurements of the dynamics of breaking and its role in processes of air-sea interaction.  ...  Therefore, when applicable, it is more efficient than a matched-field method.  ... 
doi:10.1121/1.403122 fatcat:x23kvbg555hpnktivjgqhvxspq

Prediction of room acoustical parameters

A. C. Gade
1991 Journal of the Acoustical Society of America  
A simple propagation model is presented, based on bottom-reflection coefficients, that indicates one should expect strict mode propagation and sharp cutoffs in a horizontally stratified environment having  ...  By using sediment velocities (estimated by an inversion method), known sediment porosity, and pure hydrate velocity, the amount of hydrate in the highest velocity and most intensively blanked sediments  ...  efficient Monte Carlo method called simulated anuealing.  ... 
doi:10.1121/1.2029264 fatcat:lpivxh2jlzbj7m5fkzjiq3xqqi
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