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Events on Wednesday, September 8th, 2021

Academic Calendar
Fall semester instruction begins
Abstract: *Note: actual end time may vary.*
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Physics ∩ ML Seminar
JAX MD: A Framework for Differentiable Atomistic Physics
Time: 11:00 am - 12:15 pm
Place: Online Seminar: Please sign up for our mailing list at www.physicsmeetsml.org for zoom link
Speaker: Sam Schoenholz, Google Brain
Abstract: I will talk about JAX MD, a software package for performing differentiable physics simulations with a focus on molecular dynamics. JAX MD includes a number of physics simulation environments, as well as interaction potentials and neural networks that can be integrated into these environments without writing any additional code. Since the simulations themselves are differentiable functions, entire trajectories can be differentiated to perform meta-optimization. These features are built on primitive operations, such as spatial partitioning, that allow simulations to scale to hundreds-of-thousands of particles on a single GPU. My talk will include an introduction to the JAX software package www.github.com/google/jax. If you are interested in trying out JAX MD, it is available at github.com/google/jax-md.
Host: Gary Shiu
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Department Meeting
WN@TL
Prof. Bergmann's Investiture Ceremony and Public Lecture
Time: 7:00 pm - 8:30 pm
Place: Discovery Building, H.F. DeLuca Forum, or register for Zoom link at:
Speaker: Uwe Bergmann, UW–Madison Physics
Join the department and Wednesday Nite @ The Lab for Prof. Bergmann's investiture ceremony and public lecture. A reception will follow.

On November 8, 1895, Wilhelm Conrad Rӧntgen discovered a new invisible form of rays. He called them ‘X-Strahlen’ or X-rays. Since that day, X-rays have revolutionized medical imaging and science. Starting in the 1970s, powerful accelerator rings — the so-called synchrotrons — have dramatically advanced the scientific use of X-rays, by producing intense and highly-focused X-ray beams. Another quantum leap occurred in the late 2000s, when X-ray free-electron lasers came to light. These X-ray lasers produce ultra-short pulses with a brightness over one billion times larger than even the most powerful synchrotron sources. For the first time, scientists can study matter not just at the length scale of atoms and molecules, but also at the femtosecond (10-15 s) timescale of molecular motion. The dream of making molecular movies of a chemical reaction or a biological function in real time is becoming reality. We will describe these machines and present some of the most exciting examples of recent X-ray laser research.

The Discovery Building is at 330 N. Orchard St, Madison WI. Park for a small fee in Lot 20 at 1390 University Ave, Madison WI
Host: Department
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