This Week at Physics

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This Week at Physics

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Events During the Week of October 27th through November 3rd, 2019

Monday, October 28th, 2019

Plasma Physics (Physics/ECE/NE 922) Seminar
Efficient Numerical Methods for Stellarator Optimization
Time: 12:05 pm
Place: 2241 Chamberlin Hall
Speaker: Antoine Cerfon, NYU
Host: John Sarff
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Tuesday, October 29th, 2019

Chaos & Complex Systems Seminar
The role of auditory hair cells in frequency discrimination
Time: 12:05 pm
Place: 4274 Chamberlin (refreshments will be served)
Speaker: Robert Fettiplace, UW Department of Neuroscience
Abstract: Hair cells, the sensory receptors of the vertebrate inner ear, convert incident sound stimuli into electrical signals. They also separate the sound frequency components along the cochlea behaving like an acoustic prism. Frequency analysis underlies the ability to identify environmental sounds and categorize conspecific calls, and is implemented by two distinct mechanisms. In all vertebrates except mammals, the hair cell receptor potential is electrically tuned by voltage-dependent membrane ion channels, but this process has a limited upper frequency range of a few kHz. In mammals, broad mechanical tuning is augmented by contractions of outer hair cells, underpinned by the piezoelectric protein prestin. Both mechanisms are supported by gradients in hair cell properties along the cochlea. Examples of such gradients include the numbers and types of voltage-dependent potassium channel and of the mechanically-sensitive transducer channel. An important clinical correlate is that hair cells tuned to high frequencies are much more vulnerable to damage by noise and ototoxic agents, and are the first to be lost with aging.
Host: Clint Sprott
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Council Meeting
Physics Council Meeting
Time: 3:00 pm
Place: 2314 Chamberlin Hall
Speaker: Sridhara Dasu, UW-Madison
Host: Sridhara Dasu, Department Chair
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Wednesday, October 30th, 2019

Department Meeting
Department Meeting
Time: 12:15 pm
Place: B343 Sterling Hall
Speaker: Sridhara Dasu, UW-Madison
Host: Department Chair
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Thursday, October 31st, 2019

R. G. Herb Condensed Matter Seminar
Time: 11:00 am
Place: 5310 Chamberlin Hall
Speaker: Dr. Ivan Pechenezhskiy , University of Maryland
Abstract: TBD
Host: McDermott
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Friday, November 1st, 2019

No events scheduled
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