2023 CISM course on Wave Motion in Heterogeneous Media, June 19-23

Buno Lombard  (CNRS – Laboratoire de Mécanique et d’Acoustique) and Bojan Guzina are co-organizing a CISM course on Wave Motion in Heterogeneous Media: Analysis, Modeling and Design. Speakers will include Guillaume Bal (University of Chicago), Rémi Cornaggia (Sorbonne Université – Institut Jean Le Rond d’Alembert), Richard Craster (Imperial College London), and Dennis Kochmann (ETH Zurich). The short course will be held June 19-23, 2023. More details and registration available at https://www.cism.it/en/

2022 EMI Elasticity Committee Distinguished Lecture, University of Michigan

On May 16, 2022, Prof. Guzina gave the inaugural EMI Elasticity Committee Distinguished Lecture in the Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor.

Remi Cornaggia appointed Assistant Professor at Sorbonne Université – Institut d’Alembert

Following a 2-year postdoctoral appointment at Laboratoire de Mécanique et d’Acoustique (Marseille, France) and a in at the University of Minnesota,  Remi Cornaggia, a former PhD student co-advised with Marc Bonnet (through the co-directed PhD program with Ecole Polytechnique), has joined Institut Jean Le Rond d’Alembert, Sorbonne Universityas Assistant Professor in November 2020.

Shixu Meng appointed Assistant Professor at Chinese Academy of Sciences

Following a 2-year postdoctoral appointment at the University of Michigan (Department of Mathematics),  Shixu Meng, a former IMA Post-doctoral Fellow, has joined the Institute of Applied Mathematics, Chinese Academy of Sciences, as Assistant Professor in September 2020.

2019 short course on dynamic homogenization at Institut d’Études Scientifiques, Cargese, Aug 20-30

Bojan Guzina gave a short course entitled “On the dynamic homogenization at finite wavelengths and frequencies : Dirac, Dirac-like, and almost-Dirac points” at the Summer School on Wave Propagation in Complex and Microstructured Media at Institut d’Études Scientifiques, Cargese, Corsica, August 20-30, 2019. The course slides are available here (click on “Program and pdf of lectures”).

International Conference WAVES 2017 at the University of Minnesota, May 15-19

WAVES 2017

The 13th International Conference on Mathematical and Numerical Aspects of Wave Propagation

University of Minnesota, Twin Cities campus

May 15−19, 2017

The 13th International Conference on Mathematical and Numerical Aspects of Wave Propagation will be held at the University of Minnesota. This biannual conference series is one of the main venues for dissemination of the latest advances in theoretical and computational modeling of wave phenomena, catering to the emerging problems in science and technology.

Conference Themes: Forward and Inverse Scattering, Fast Computational Techniques, Numerical Analysis, Domain Decomposition, Analytical & Asymptotic Methods, Nonlinear Wave Phenomena, Water Waves, Guided Waves and Random Media, Medical and Seismic Imaging, Homogenization of Wave Problems, Modeling Aspects in Photonics and Phononics, Mathematical Problems in Optics.

Organizers: Bojan Guzina and Stefano Gonella

Fatemeh Pourahmadian appointed Assistant Professor at University of Colorado Boulder

Following a 4-month postdoctoral position in at the University of Minnesota, Fatemeh Pourahmadian , a former PhD student co-advised with Joseph Labuz, has joined the Department of Civil, Environmental and Architectural EngineeringUniversity of Colorado at Boulder, as tenure-track Assistant Professor in January 2017.

Sound of a chessboard: homogenization of wave motion in periodic solids

This work [59] illustrates the pursuit of a formal two-scale homogenization approach to extract the mean wave motion in bi-periodic solids, including the effect of incipient dispersion. We show that such low-frequency expansion leads to a family of fourth-order PDEs (resembling the phenomenological models of gradient elasticity) whose coefficients derive explicitly from the microstructure.

Multiply scattered waves sense fractal microscopic structures via dispersion

In this collaborative study [62] with Ralph Sinkus and Sverre Holm, we demonstrate by experiment and theory the ability of elastic waves to sense random microstructures that are three decades smaller in size than the probing wavelength. Our analysis deploys an extension of the O’Doherty-Anstey (ODA) theory and the fact that interparticle distances in random monosized distributions may exhibit fractal character.