## Annual Report, 2009

### This annual report is dedicated to the memory of Albert Tarantola.

## Slides Sets from Review Meeting, 29 Jan 10

Room 1049, Duncan Hall, Rice University.

- 0830-0900: Coffee, meet
- 0900-0930: Overview (Bill)
- 0930-1000: Discontinuous Galerkin Time Domain Methods for Acoustics and Comparison with Finite Difference Time Domain Methods (Xin)
- 1000-1030: Accurate finite difference schemes for constant density acoustics: mass lumping and stencil coefficient optimization (Igor)
- 1030-1040: break
- 1040-1110: Harmonic Coordinate Enhanced Finite Element Space: Basis Representation and Accurate Integral Evaluation (Tommy)
- 1110-1130: TRIP Contribution to SEAM (Bill)
- 1130-1140: Restructuring IWAVE (Xin)
- 1140-1300: lunch at Cohen House
- 1300-1330: The Conditioning of the Normal Operator for Variable Density Acoustics (Rami)
- 1330-1400: Inversion Using the TSOpt Framework (Marco)
- 1400-1010: break
- 1410-1440: IWAVE Implementation of Waveform Inversion via Nonlinear DSO (Dong)
- 1440-1510: Source synthesis for waveform inversion (Bill)
- 1510-1540: Discussion
- 1540-....: adjourn; further discussion in Room 2014, Valhalla

## Expanded Abstracts from SEG 2009:
- Fuchun Gao and William W. Symes:
*Differential Semblance Velocity Analysis by Reverse Time Migration:
Image Gathers and Theory*, SI 2.8
- Rami Nammour and William W. Symes:
*Approximate Constant Density Acoustic Inverse Scattering Using
Dip-Dependent Scaling*, SI 3.6
- Dong Sun and William W. Symes:
*A Nonlinear Differential Semblance Strategy for Waveform Inversion:
Experiments in Layered Media*, SI P3.5
- William W. Symes and Igor Terentyev:
*Subgrid modeling via mass lumping in constant density acoustics
*, SM 1.7
- William W. Symes, Igor S. Terentyev and Tetyana Vdovina:
*Getting it right without knowing the answer:
quality control in a large seismic modeling project*, SM 2.5

*Differential Semblance Velocity Analysis by Reverse Time Migration: Image Gathers and Theory*, SI 2.8*Approximate Constant Density Acoustic Inverse Scattering Using Dip-Dependent Scaling*, SI 3.6*A Nonlinear Differential Semblance Strategy for Waveform Inversion: Experiments in Layered Media*, SI P3.5*Subgrid modeling via mass lumping in constant density acoustics*, SM 1.7*Getting it right without knowing the answer: quality control in a large seismic modeling project*, SM 2.5## Theses and Reports:

- Marco U. Enriquez: The effects of coupling adaptive time-stepping and adjoint-state methods for optimal control problems , PHD Proposal (defended Dec 2009)
- Chao Wang: An alternative approach to differential semblance velocity analysis via normal moveout correction, MA Thesis (TBA)
- Xin Wang: Discontinuous Galerkin time domain methods for acoustics and comparison with finite difference time domain methods , MA Thesis (defended Dec 2009)

## Papers in refereed journals (appeared, accepted, submitted)

- Anthony Padula, William W. Symes, and Shannon D. Scott,
*A software framework for the abstract expression of coordinate-free linear algebra and optimization algorithms*, ACM Transactions on Mathematical Software,**37**, pp 8:1–8:36, 2009 - Christiaan C. Stolk, Maarten V. de Hoop, and William W. Symes,
*Kinematics of shot-geophone migration*, Geophysics,**74**, pp WCA18–WCA34, 2009 - William W. Symes,
*The seismic reflection inverse problem*, Inverse Problems,**25**, pp 123008:1–24, 2009 - William W. Symes and Tetyana Vdovina,
*Interface error analysis for numerical wave propagation*, Computational Geosciences,**13**, pp 363–370, 2009