Mathematical modeling

Thursday, March 10, 2016 - 7:00pm - 8:30pm
Geophysical hazards such as tsunamis, storm surges, debris flows, and landslides pose a significant risk to a large fraction of the world's population. Mathematical models and computer simulations of these hazards are critical in developing a better understanding of past events, both recent and pre-historic. They are also used to assess hazards, issue real-time warnings, and help communities prepare – despite the uncertainties surrounding potential future disasters.
Tuesday, February 4, 2014 - 11:15am - 12:15pm
Samantha Oestreicher (University of Minnesota, Twin Cities)
Friday, August 16, 2013 - 11:30am - 12:00pm
Vanessa Lopez (IBM)
Friday, August 16, 2013 - 10:00am - 10:30am
Timothy Burns (National Institute of Standards and Technology)
Monday, August 12, 2013 - 10:10am - 10:30am
Timothy Burns (National Institute of Standards and Technology)
Thursday, July 18, 2013 - 8:40am - 9:30pm
Ronald Siegel (University of Minnesota, Twin Cities)
Hydrogels can play both passive and active roles in chemical oscillations and pattern formations. Passively, they can provide a nonconvective environment in which reactions occur, or they can respond by swelling or shrinking according changes in the chemical environment, which is time and/or space varying. In recent years, more active feedback couplings between hydrogels and chemical reactions have been investigated. Hydrogel systems that are coupled to the oscillating Belousov-Zhabotinsky reaction have been well studied.
Wednesday, August 7, 2013 - 10:00am - 10:20am
Izhak (Zachi) Baharav (Corning Incorporated)
QR-codes are two-dimensional barcodes which gained popularity in recent years. These codes enable people to scan them using conventional cell-phone camera, and then get directed to appropriate web-site, or retrieve other information. Another place you often encounter these QR-codes is in boarding-tickets and similar applications, where a conventional scanner can retrieve the information from the code. (Figure 1)
Monday, May 13, 2013 - 11:30am - 12:20pm
Lai-Sang Young (New York University)
I will report on recent work which proposes that the network dynamics
of the mammalian visual cortex are neither homogeneous nor synchronous but
highly structured and strongly shaped by temporally localized barrages of
excitatory and inhibitory firing we call `multiple-firing events' (MFEs).
Our proposal is based on careful study of a network of spiking neurons built to
reflect the coarse physiology of a small patch of layer 2/3 of V1. When
appropriately benchmarked this network is capable of reproducing the
Wednesday, March 28, 2012 - 12:00pm - 12:45pm
Jean-Philippe Vert (École Nationale Supérieure des Mines de Paris)
The group lasso is an extension of the popular lasso regression method which allows to select predefined groups of features jointly in the context of regression or supervised classification. I will discuss two extensions of the group lasso, motivated by applications in genomic data analysis. First, I will present a new fast method for multiple change-point detection in multidimensional signals, which boils down to a group Lasso regression problem and allows to detect frequent breakpoint location in DNA copy number profiles with millions of probes.
Wednesday, July 23, 2008 - 2:45pm - 3:00pm
Jinhae Park (Purdue University)
In this talk, we first discuss mathematical modeling of
ferroelectric liquid crystals with existence results. With a special
geometry, we consider a one dimensional problem with an applied field.
We present existence of finitely many equilibrium branches and nested
hysteresis loops between the polarization and applied fields, which
show finer structures of ferroelectric materials.


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