### Tuesday, June 2

## IP3

Parabolic Equation Techniques for Wave Propagation

8:00 AM-8:45 AM

*Chair: Graeme Fairweather, Colorado School of Mines*

*Room 246*

The parabolic equation method is useful for solving nonseparable wave propagation problems that are dominated by outgoing energy. It is an important method because such problems are very common; applications include seismology, ocean acoustics, atmospheric acoustics, gravity waves, electromagnetic waves, waves in porous media, and nonlinear waves. Parabolic equation techniques provide large efficiency gains and make it possible to routinely solve problems that would otherwise be intractable. Parabolic equation techniques are also very accurate provided the outgoing assumption holds. In this presentation, the speaker will provide an overview of parabolic equation techniques and discuss some of the unresolved problems. (This is a joint work with William L. Siegmann, Rensselaer Polytechnic Institute.)

**Michael D. Collins**

*U. S. Naval Research Laboratory*

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*tjf, 12/22/97*