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This Week at Physics

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Events During the Week of April 19th through April 26th, 2015

Monday, April 20th, 2015

No events scheduled

Tuesday, April 21st, 2015

Chaos & Complex Systems Seminar
Towards understanding IceCube high energy neutrinos
Time: 12:05 pm
Place: 4274 Chamberlin Hall (Refreshments will be served)
Speaker: Yang Bai, UW Department of Physics
Abstract: The IceCube collaboration has recently observed high energy neutrinos in the 30 TeV to 2 PeV range. The flux is much above the atmospheric neutrino background and requires new sources to explain its origin. In this talk, I will provide a list of potential explanations with a focus on decaying dark matter and point-like sources.
Host: Clint Sprott
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"Physics Today" Undergrad Colloquium (Physics 301)
Semiconductor Quantum Dot-Based Qubits
Time: 1:20 pm
Place: 2120 Chamberlin Hall
Speaker: Mark Eriksson, UW Madison Department of Physics
Host: Smith
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Theory Seminar (High Energy/Cosmology)
Title to be announced
Time: 4:00 pm
Place: 5280 Chamberlin Hall
Speaker: Sonia El Hedri
Host: Ran Lu
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Wednesday, April 22nd, 2015

No events scheduled

Thursday, April 23rd, 2015

R. G. Herb Condensed Matter Seminar
TBD
Time: 10:00 am
Place: 5310 Chamberlin Hall
Speaker: Bill Coish, McGill University
Abstract: TBD
Host: Coppersmith
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
The status of India-based Neutrino Observatory (INO)
Time: 2:30 pm
Place: 5310 Chamberlin Hall
Speaker: Bannanje Sripathi Acharya, Tata Institute
Abstract: In this talk I shall narrate our plans of building a new underground laboratory facility in southern India called India-based neutrino observatory (INO). A 50 kilo-ton magnetised Iron CALorimeter (ICAL)is one of the first experiments proposed to be housed in this observatory for the study of neutrino properties like mass hierarchy, precision measurement of oscillation parameters etc. using the atmospheric neutrinos. The details of this ICAL project and its present status will also be covered in this talk.
Host: Justin Vandenbrouke
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Friday, April 24th, 2015

Cosmology Journal Club
An Informal discussion about a broad variety of arXiv papers related to Cosmology
Time: 12:15 pm
Place: 5242 Chamberlin Hall
Abstract: Please visit the following link for more details:
    http://cmb.physics.wisc.edu/journal/index.html
Please feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Le Zhang (lzhang263@wisc.edu)
Host: Peter Timbie
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Physics Department Colloquium
Universal quake statistics: from nanopillars to earthquakes
Time: 3:30 pm
Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
Speaker: Karin Dahmen, University of Illinois
Abstract: The deformation of many solid materials is not continuous, but discrete, with intermittent slips similar to earthquakes. Here, we suggest that the statistical distributions of the slips, such as the slip-size distributions, reflect tuned criticality, with approximately the same regular (power-law) functions, and the same tunable exponential cutoffs, for systems spanning 13 decades in length, from tens of nanometers to hundreds of kilometers; for compressed nano-crystals, to amorphous materials, ]to earthquakes. The similarities are explained by a simple analytic model, which suggests that results are transferable across scales. This study provides a unified understanding of fundamental properties of shear-induced deformation in systems ranging from nanocrystals to earthquakes. It also provides many new predictions for future experiments and simulations. The studies draw on methods from the theory of phase transitions, the renormalization group, and numerical simulations. Connections to other systems with avalanches, such as magnets and neuron firing avalanches in the brain are also discussed.
Host: Sue Coppersmith
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