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Events at Physics

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Events During the Week of November 28th through December 4th, 2021

Sunday, November 28th, 2021

Academic Calendar
Thanksgiving recess
Time: 12:00 am
Place:
Abstract: *Note: actual end time may vary.*
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Monday, November 29th, 2021

No events scheduled

Tuesday, November 30th, 2021

Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
TBD
Time: 12:00 am
Place:
Speaker: Lukas Graf , UCSD/Berkeley: 2021 PFC fellow talk
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Council Meeting
Time: 4:00 pm
Place: 2314 Chamberlin
Speaker: Mark Eriksson, UW-Madison, Department of Physics
Host: Mark Eriksson
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Wednesday, December 1st, 2021

Physics ∩ ML Seminar
Uncovering the Unknowns of Deep Neural Networks: Challenges and Opportunities
Time: 11:00 am
Place: Chamberlin 5280 (Zoom link also available for online participants who signed up on our mailing list)
Speaker: Sharon Li, University of Wisconsin-Madison
Abstract: The real world is open and full of unknowns, presenting significant challenges for machine learning (ML) systems that must reliably handle diverse, and sometimes anomalous inputs. Out-of-distribution (OOD) uncertainty arises when a machine learning model sees a test-time input that differs from its training data, and thus should not be predicted by the model. As ML is used for more safety-critical domains, the ability to handle out-of-distribution data are central in building open-world learning systems. In this talk, I will talk about challenges, methods, and opportunities on uncovering the unknowns of deep neural networks for reliable decision-making in an open world.
Host: Gary Shiu
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Department Meeting
Time: 12:15 pm
Place: B343 Sterling
Speaker: Mark Eriksson, UW - Madison
Host: Mark Eriksson
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Thursday, December 2nd, 2021

High Energy Seminar
tbd
Time: 2:30 pm
Place: 4274 Chamberlin Hall
Speaker: Caterina Vernieri, SLAC
Abstract: tbd
Host: Sridhara Dasu
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
A "cool” copper collider to unveil the Higgs boson’s secrets
Time: 2:30 pm
Place: 4274 Chamberlin and Zoom:
Speaker: Caterina Vernieri, SLAC
Abstract: The Higgs boson was discovered in 2012 by the ATLAS and CMS experiments at the world’s most powerful particle collider, the Large Hadron Collider (LHC) in Geneva, Switzerland. This particle plays a unique role in fundamental physics. It gives all of the known elementary particles, including itself, their masses. While we now have a strong evidence that the Higgs field is indeed the unique source of mass for the known elementary particles, the next step is to search for new interactions that could also explain why the Higgs field has the properties required by the Standard Model of particle physics. We have no clear roadmap to this new theory but the Higgs boson plays a crucial role in this quest. The goal of a next-generation e+e- collider is to carry out precision measurements to per-cent level of the Higgs boson properties that are not accessible at the LHC and HL-LHC. In this talk will we present the study of a new concept for a high gradient, high power accelerator with beam characteristics suitable to study the Higgs boson, the Cool Copper Collider (C^3), with the goal of significantly reducing capital, footprint and operating costs. We will present a timeline for such a collider to enable Higgs boson precision measurements exploring increasing energies for the center-of-mass collisions. The exploitation of the complementarity between LHC and future colliders will be the key to understanding fundamentally the Higgs boson.
Host: Sridhara Dasu
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Astronomy Colloquium Zoom Talk
The Nancy Grace Roman Space Telescope and its H4RG-10 Detectors
Time: 3:30 pm
Place: This will be a Zoom Talk. Information to Follow soon.
Speaker: Gregory Mosby, NASA
Abstract: We have learned that our universe seems to be composed of significant amounts of invisible matter called dark matter and an unexpected dark energy driving the universe’s accelerating expansion. In the last few decades, we have also uncovered large populations of new worlds called exoplanets orbiting the stars of our Galaxy. These discoveries represent just a sample of the mysteries to investigate in our efforts to understand the universe. And to understand the universe, we must understand all its components. The Nancy Grace Roman Space Telescope will support this effort. The Roman Space Telescope with its Wide Field Instrument and the Coronagraph Instrument will help us study dark matter, dark energy, exoplanets, and more at infrared wavelengths. At the heart of the Roman Space Telescope are 18 newly designed infrared detectors the H4RG-10s. These detectors represent the state of the art in space-based detector technology. We will review the development and the performance of the flight lot detectors for the Roman Space Telescope, and we’ll cover the latest news from the project. The Roman Space Telescope will be an asset in the next decade, providing unprecedented wide and sensitive infrared surveys of the sky. These surveys by Roman will be key in helping us answer the open questions about the universe. This is a virtual talk. Please see the link below:
Host: Professor Ellen Zweibel
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Friday, December 3rd, 2021

Graduate Introductory Seminar (Physics 701)
HEP
Time: 12:05 pm
Place: 2241 Chamberlin
Speaker: Tulika Bose, UW Madison Department of Physics
Host: Sridhara Dasu
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Physics Department Colloquium
The Increasing Peril from Nuclear Arms: and how physicists can help reduce the threat
Time: 3:30 pm
Place: 2103 Chamberlin Hall
Speaker: Stewart Prager, Princeton
Abstract: With geopolitical and technological changes mostly driven by the nuclear weapons states, we are slipping towards a new arms race and deterioration of the multi-decade arms control regime. This talk will describe the current critical situation, feasible steps to reduce the nuclear threat, and a new project sponsored by the American Physical Society to engage physical scientists in advocacy for nuclear threat reduction. After the colloquium a short meeting will be held for those interested in learning about the APS Physicists Coalition for Nuclear Threat Reduction.
Host: Cary Forest
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