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 in the summer of 2023. Details to follow.
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.
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 University, as Assistant Professor in November 2020.
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”).
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
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 Engineering, University of Colorado at Boulder, as tenure-track Assistant Professor in January 2017.
This work  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.
In this collaborative study  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.