A
Alison Malcolm
Researcher at Memorial University of Newfoundland
Publications - 151
Citations - 1567
Alison Malcolm is an academic researcher from Memorial University of Newfoundland. The author has contributed to research in topics: Inversion (meteorology) & Seismic migration. The author has an hindex of 21, co-authored 141 publications receiving 1323 citations. Previous affiliations of Alison Malcolm include St. John's University & Massachusetts Institute of Technology.
Papers
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Extracting the Green function from diffuse, equipartitioned waves.
TL;DR: A ballistic pulse launched in a strongly scattering random medium becomes diffusive after a few mean-free times and the two-point, two-time correlation of the wave-field should equal the sum of the advanced and retarded Green functions associated with the average medium.
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Seismic Imaging and Illumination with Internal Multiples
TL;DR: In this paper, the authors present an approach to use multiply scattered waves to illuminate structures not sensed by singly scattered waves, which can be viewed as a refinement of past work in which a method to predict artefacts in imaging with multiply-scattered waves was developed.
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Laser characterization of ultrasonic wave propagation in random media
John A. Scales,Alison Malcolm +1 more
TL;DR: Noncontacting (laser source and detector) measurements of ultrasonic wave propagation in randomly heterogeneous rock samples are described and the intensity data are well fit by a radiative transfer model, and the scattering mean free path is inferred.
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Tomographic errors from wave front healing: more than just a fast bias
Alison Malcolm,Jeannot Trampert +1 more
TL;DR: In this paper, the authors review the theory from the mathematical physics community that explains the properties of diffractions and apply it to a suite of increasingly complicated numerical examples, focusing in particular on the elastic case and on the differences between P and S healing.
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Time-lapse full-waveform inversion with ocean-bottom-cable data: Application on Valhall field
TL;DR: In this article, the authors applied independent and joint FWI schemes to two time-lapse Valhall OBC data sets, which were acquired 28 months apart, and found that double-difference waveform inversion gave a cleaner and more easily interpr...