PROGRAM MÖLLE WORKSHOP JUNE 29 - JULY 1, 1995

                       
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                       THURSDAY JUNE 29

              OPENING OF THE WORKSHOP   14.00 hrs

                       SESSION 14.00-17.00 hrs

TITLE: Review of 1D results for time-domain inversion methods, a) Invariant
imbedding approach, b) Green function techniques.

CONVENERS/SESSION ORGANIZERS: Anders Karlsson, LTH, Sweden and
Staffan Ström, KTH, Sweden.

1. Jonas Lundstedt, KTH, Sweden, (inhomogeneous, non-dispersive case).

2. Sten Rikte, LTH, Sweden, (homogeneous, dispersive case).

3. Kevin Kreider, University of Akron, USA, (3D cases that essentially are 1D).

4. Discussion

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                       FRIDAY JUNE 30

                       SESSION 9.00-12.00

TITLE: Review of current multi-D computational inversion methods.

CONVENERS/SESSION ORGANIZERS: Curt Vogel, Montana State University, USA and
Don Heller, Ames Lab, USA.

1. Don Heller, Ames Lab, USA,
   Practical Issues of Seismic Data Processing
   (plain text).

2. Curt Vogel, Montana State University, USA,
   Mathematical Issues in Multi-D Inversion and Large Scale Optimization
   (postscript, 1 Mbyte).  See also
   Overview of Unconstrained Optimization
   for background material (postscript, 97 Kbytes).

3. Björn Engquist, UCLA, USA and KTH, Sweden,
   "Direct Simulations and Large Scale Computations".

4. Sailing He, KTH, Sweden,
   "Applications of 3D wave-splitting operator to some direct and inverse
    problems".

5. Discussion

                       SESSION 14.00-17.00

TITLE: Different formulations, a) Wave field (Green functions), b)
Scattering operator kernel, c) Dirichlet-to-Neumann operator kernel.

CONVENERS/SESSION ORGANIZERS: Vaughan Weston, Purdue University, USA,
Martijn de Hoop, Schlumberger Cambridge, Research, England and
Gerry Wickham, Brunel University, England.

1. Vaughan Weston, Purdue University, USA, (overview).

2. Gerry Wickham, Brunel University, England, (various splitting formulations)

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                       SATURDAY JULY 1

                       SESSION 9.00-12.00

TITLE: Computational aspects of the square root and related operators.

CONVENERS/SESSION ORGANIZERS: Louis Fishman, Ames Lab, USA and
David Wall, University of Canterbury, New Zealand.

1. Vaughan Weston, Purdue University, USA,
   "A numerical approach to the calculation of the square root operator".

2. Guanquan Zhang, China,
   "Paraxial approximations of square-root operators
   and inverse problems in multi-dimensional wave equations".

3. Björn Engquist, UCLA, USA and KTH, Sweden,
   "Square root operator calculations within the framework of Absorbing
   Boundary Conditions".

4. Martijn De Hoop, Schlumberger Cambridge, Research, England/Gerry Wickham,
   Brunel University, England,
   "Calculation of the Dirichlet-Neumann map for solution of the direct 
   problem, and possible extensions to Inverse Problems".

5. Zhiming Sun, Ames Lab, USA,
   "Calculation of the square root operator for a direct problem in a 
   dispersive media".

6. Lou Fishman, Ames Lab, USA,
   "Calculation of the Square root operator in the frequency domain".

                       SESSION 14.00-17.00

TITLE: Regularization of the ill-posed problem.

CONVENERS/SESSION ORGANIZERS: Staffan Ström, KTH, Sweden,
Vladimir Romanov, Novosibirsk, Russia and Guanquan Zhang, China

1. Vaughan Weston, Purdue University, USA,
   "Approximation and regularization of the inverse D operator".

2. Sailing He, KTH, Sweden,
    "Numerical aspects on ill-posed migration of transient data in 3D
    inhomogeneous half-space".

3. Vladimir Romanov, Novosibirsk, Russia,
   "On solution of an inverse problem for a hyperbolic equation by wave field
   continuation inside a domain".

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