Colloquium Ehrenfestii by Heinrich Jaeger (University of Chicago). 

Acoustically Levitated Granular Matter

The Colloquium Ehrenfestii takes place Wednesday evenings starting at 19:30 hours in the main auditorium of the Oort building. Before the Colloquium, there is a common dinner in the canteen located on the ground floor of the Oort building. This dinner starts at 18:00 hours sharp and is free of charge, under the condition that one attends the colloquium and that one has made a reservation before noon on the Tuesday preceding the colloquium.

More information (including online link and link to register for the preceding dinner) can be found on this website.