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- Brian Zadler, Jérôme Le Rousseau, John A. Scales, Martin L. Smith
- 2003

Resonant Ultrasound Spectroscopy (RUS) uses normal modes of elastic bodies to infer material properties such as elastic moduli and Q. In principle, the complete elastic tensor can be inferred from a… (More)

- Roel Snieder, Alexandre A. Grêt, H. Douma, John A. Scales
- Science
- 2002

In coda wave interferometry, one records multiply scattered waves at a limited number of receivers to infer changes in the medium over time. With this technique, we have determined the nonlinear… (More)

- Alison E. Malcolm, John A. Scales, Bart A van Tiggelen
- Physical review. E, Statistical, nonlinear, and…
- 2004

A ballistic pulse launched in a strongly scattering random medium becomes diffusive after a few mean-free times. In this regime of diffusive propagation there is a net flux of energy away from the… (More)

Fast / P Solution of Large , Sparse , Linear Systems : Application to Seismic Travel Time Tomography

- John A. Scales, ADAM GERSZTENKORN, Sven Treitel
- 2002

Least-squares inversion tends to be sensitive to small changes in the assumptions; in the statistical lexicon, it is not “robust.” Least-squares solutions of noisy, ill-conditioned systems often… (More)

[1] The coda of seismic waves consists of that part of the signal after the directly arriving phases. In a finite medium, or in one that is strongly heterogeneous, the coda is dominated by waves… (More)

- Kasper van Wijk, Matthew M. Haney, Roel Snieder, John A. Scales
- 2003

There is a growing interest in incorporating multiply scattered waves into modeling the Earth’s interior using radiative transfer theory. For thin beds, we derive the equivalence of the exponential… (More)

In the presence of multiple scattering, waves and particles behave fundamentally differently. As a model for the stability of the temporal evolution of particle and wave propagation, a scattering… (More)

- Wences P Gouveia, John A. Scales
- 2007

In Bayesian inference, probabilistic information about models is posited a priori . This information, which may very well include features in the null space of the forward problem, affects both the… (More)

- R. P. Bording, Adam Gersztenkorn, Larry R. Lines, John A. Scales, Sven Treitel
- 2006

This paper describes the application of tomography to seismic travel-time inversion. There are various implementations of travel-time tomography. In reflection tomography, sources and receivers are… (More)

- Kasper van Wijk, John A. Scales, William Navidi, Luis Tenorio
- 2002

Inverse theory concerns the problem of making inferences about physical systems from indirect noisy measurements. Information about the errors in the observations is essential to solve any inverse… (More)