SIAM Student Chapter Seminar

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  • When: Every Other Wednesday at 2:15 pm (except as otherwise indicated)
  • Where: 901 Van Vleck Hall
  • Organizers: Ke Chen
  • To join the SIAM Chapter mailing list: email [join-siam-chapter@lists.wisc.edu] website.



Fall 2018

date speaker title
Sept. 12 Ke Chen (Math) Inverse Problem in Optical Tomography
Spet. 26 Kurt Ehlert (Math) How to bet when gambling
Oct. 10 Zachary Hansen (Atmospheric and Oceanic Sciences) Land-Ocean contrast in lightning
Oct. 24 Xuezhou Zhang (Computer Science) TBA


Abstract

Sep 12: Ke Chen (Math)

Inverse Problem in Optical Tomography

I will briefly talk about my researches on the inverse problems of radiative transfer equations, which is usually used as a model to describe the transport of neutrons or other particles in a certain media. Such inverse problems considers the following question: given the knowledge of multiple data collected at the boundary of the domain of interest, is it possible to reconstruct the optical property of the interior of media? In this talk, I will show you that stability of this problem is deteriorating as the Knudsen number is getter smaller. The talk will be introductory and anyone graduate is welcome to join us.

Sept 26: Kurt Ehlert (Math)

How to bet when gambling

When gambling, typically casinos have an edge. But sometimes we can gain an edge by counting cards or other means. And sometimes we have an edge in the biggest casino of all: the financial markets. When we do have an advantage, then we still need to decide how much to bet. Bet too little, and we leave money on the table. Bet too much, and we risk financial ruin. We will discuss the "Kelly criterion", which is a betting strategy that is optimal in many senses.

Oct 10: Zachary Hansen (Atmospheric and Oceanic Sciences)

Land-Ocean contrast in lightning

Land surfaces have orders of magnitude more lightning flashes than ocean surfaces. One explanation for this difference is that land surfaces may generate greater convective available potential energy (CAPE), which fuels stronger thunderstorms. Using a high resolution cloud-resolving atmospheric model, we test whether an island can produce stronger thunderstorms just by having a land-like surface. We find that the island alters the distribution of rainfall but does not produce stronger storms. An equilibrium state known as boundary layer quasi-equilibrium follows, and is explored in more detail.

Oct 24: Xuezhou Zhang (Computer Science)

TBD

TBD