MenuEvents for 01/27/2017 from all calendars
Mathematical Physics and Harmonic Analysis Seminar
Time: 1:50PM - 2:50PM
Location: BLOC 628
Speaker: Prof. L. Kunyansky, University of Arizona
Title: Lorentz force impedance tomography in 2D: Theory and Experiments
Abstract: We will start with a brief overview of the emerging family of "multi-physics" modalities of medical imaging. After discussing the general ideas underlying these techniques, and the advantages they promise to deliver, we will concentrate on the Lorentz force impedance tomography --- a novel modality that should yield stable, high-resolution images of the conductivity distribution in the tissues. After a short theoretical introduction into the Lorentz force tomography, I will present the design of a simplified 2D MAET scanner we have built, and will discuss new mathematical problems associated with this device, and the methods that can be used to solve them. (Joint work with R.S. Witte and C.P. Ingram)
Inverse Problems and Machine Learning
Time: 1:50PM - 2:50PM
Location: BLOC 628
Speaker: Prof. L. Kunyansky, University of Arizona
Title: Lorentz force impedance tomography in 2D: Theory and Experiments
Abstract: We will start with a brief overview of the emerging family of "multi-physics" modalities of medical imaging. After discussing the general ideas underlying these techniques, and the advantages they promise to deliver, we will concentrate on the Lorentz force impedance tomography --- a novel modality that should yield stable, high-resolution images of the conductivity distribution in the tissues. After a short theoretical introduction into the Lorentz force tomography, I will present the design of a simplified 2D MAET scanner we have built, and will discuss new mathematical problems associated with this device, and the methods that can be used to solve them. (Joint work with R.S. Witte and C.P. Ingram)
Colloquium - Nathan Williams
Time: 4:00PM - 5:00PM
Location: BLOC 220
Speaker: Nathan Williams
Description:
Title: Sweeping up Zeta
Abstract:
I will discuss three combinatorial problems with the same solution.
In 2002, R. Suter defined a striking cyclic symmetry of order n+1 on the subposet of Young’s lattice consisting of the 2^n partitions with largest hook at most n. These partitions naturally arise from D. Peterson's parametrization of abelian ideals of a Borel subalgebra using the affine Weyl group (as told by B. Kostant); the cyclic symmetry comes from the fact that the affine Dynkin diagram in type A is a cycle.
Problem 1. Describe the orbit structure of Suter's cyclic symmetry.
More Details
Problem 2. Show that the sweep map is a bijection on Dyck(a,b).
Problem 3. With these assumptions, find an assignment of starting hours for the tasks so that the workload throughout the day is constant.
This is based on joint work with Hugh Thomas.
URL: Event link
