Prof. Dan Givoli – biographical sketch

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- Professor at the Department of Aerospace Engineering, Technion – Israel Institute of Technology
- Holds the Lawrence and Marie Feldman Chair in Engineering at the Technion
- Fellow of the International Association for Computational Mechanics (IACM)
- Former President and one of the three founders of the Israel Association for Computational Methods in Mechanics (IACMM), which is affiliated
  with ECOOMAS and with IACM
- Associate Editor of two journals: Wave Motion and Journal of Computational Acoustics
- A member of the Editorial Board of seven other journals, including Int. J. Numerical Methods in Engineering (IJNME) and Computer Methods
  in Applied Mechanics and Engineering (CMAME)
- A member of the Solid and Structural Mechanics Committee (ECCSM) of ECCOMAS
- Served as an elected member of the IACM General Council for 16 years

- Completed his PhD degree at Stanford University in 1988
- Has won several Excellent Teaching awards at the Technion
- Held Visiting Professor positions at four other universities: Tel Aviv U., RPI, NPS and TU Delft.
- During 2004-05 served as the Dean of the Dept. of Aerospace Engineering, Technion
- Since Jan. 2017 serves as the Dean of the Graduate School of the Technion (for 3 years)

- Published over 100 papers in scientific journals, including four highly-cited review papers, and many more papers in conference proceedings and edited books
- Wrote the monograph “Numerical Methods for Problems in Infinite Domains” that was published by Elsevier in 1992 and soon after became out-of-print
- Has co-edited several books and Special Issues in scientific journals
- Constantly writes "popular science" articles on computational mechanics related topics, and is the permanent writer of the Book Review section in IACM
- Field of interest: developing computational methods in mechanics and aerospace engineering, especially in the area of wave propagation, and in particular
  computational methods for waves in solids and structures

Computational Time Reversal for Source and Scatterer Identification

Dan Givoli
Dept. of Aerospace Engineering, Technion, Haifa, Israel
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Inverse wave problems are characterized by the fact that part of the information usually needed for well-posedness of the problem (for example the material properties or a part of the geometry) is unknown, and on the other hand certain physical measurements provide some information on the wave field. The problem of identifying a crack in a structure based on sound measurements belongs to this category of problems. One may distinguish between passive identification (e.g., identification of a wave source) and active identification (e.g., identification of a scatterer when the source is given).
This talk will start with a short introduction to inverse wave problems of both kinds, followed by a discussion on the use of Time Reversal (TR) as a computational tool to solve such problems. Source and scatterer identification in structures and unbounded media will be focused on. The capability of TR in identifying damage in structures as well as obstacles in the ground will be demonstrated. Ongoing work will be described.


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