SIAM Student Chapter Seminar: Difference between revisions

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__NOTOC__
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*'''When:''' 3:30 pm
*'''When:''' Mondays at 3:30 PM
*'''Where:''' Zoom
*'''Where:''' 9th floor lounge (we will also broadcast the virtual talks on the 9th floor lounge with refreshments)
*'''Organizers:''' [http://www.math.wisc.edu/~xshen/ Xiao Shen]
*'''Organizers:''' [https://sites.google.com/wisc.edu/evan-sorensen Evan Sorensen]
*'''Faculty advisers:''' [http://www.math.wisc.edu/~jeanluc/ Jean-Luc Thiffeault], [http://pages.cs.wisc.edu/~swright/ Steve Wright]  
*'''Faculty advisers:''' [http://www.math.wisc.edu/~jeanluc/ Jean-Luc Thiffeault], [http://pages.cs.wisc.edu/~swright/ Steve Wright]  
*'''To join the SIAM Chapter mailing list:''' email [mailto:siam-chapter+join@g-groups.wisc.edu siam-chapter+join@g-groups.wisc.edu].
*'''To join the SIAM Chapter mailing list:''' email [mailto:siam-chapter+join@g-groups.wisc.edu siam-chapter+join@g-groups.wisc.edu].
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== Fall 2020  ==
==Spring 2022==


{| cellpadding="8"
{| cellpadding="8"
!align="left" | date
!align="left" | date and time
!align="left" | location
!align="left" | speaker
!align="left" | speaker
!align="left" | title
!align="left" | title
|-
|-
|9/29
| Feb 7, 3:30-4 PM
|Yu Feng (Math)
| Virtual [https://meet.google.com/gfs-yjbq-dmv/ (link)]
|''[[#9/29, Yu Feng (Math)|Phase separation in the advective Cahn--Hilliard equation]]''
| Keith Rush (Senior Software Engineer at [https://www.google.com/ Google])
|''[[#Feb 7, Keith Rush |Industry talk]]''
|-
|-
|-
|-
|9/29
|-
|Dongyu Chen (WPI)
| Feb 14, 3:30-4 PM
|''[[#10/14, Dongyu Chen (WPI)|A Half-order Numerical Scheme for Nonlinear SDEs with one-sided Lipschitz Drift and H\:{o}lder Continuous Diffusion Coefficients]]''
| Virtual [https://uwmadison.zoom.us/j/91217562664?pwd=SGZOS3JGaFVGa250NXhDZlkrbWU3dz09/ (link)] Passcode: 400453
| [https://www.linkedin.com/in/shawnmittal/ Shawn Mittal] (Senior Deliver Data Scientist at [https://www.microsoft.com/en-us/?ql=5/ Microsoft])
|''[[#Feb 14, Shawn Mittal |Who, What, Why of Data Science in Industry]]''
|-
|-
|-
| Feb 21, 3:30-4 PM
| 9th floor lounge
| Brandon Boggess [https://www.epic.com/ (Epic)]
|''[[#Feb 21, Brandon Boggess |Industry talk]]''
|-
|-
|-
| Feb 28, 3:30-4 PM
| 9th floor lounge
| [https://www.linkedin.com/in/shi-chen-98b7431a0/?originalSubdomain=cn/ Shi Chen] (UW-Madison)
|''[[#Feb 28, Shi Chen| Classical limits of direct and inverse wave type problems -- a Wigner transform approach]]''
|-
|-
|-
| Mar 7, 3:30-4 PM
| Virtual [https://uwmadison.zoom.us/j/91217562664?pwd=SGZOS3JGaFVGa250NXhDZlkrbWU3dz09/ (link)] Passcode: 400453
| Tom Edwards (Software Engineer at [https://www.google.com/ Google])
|''[[#Mar 7, Tom Edwards| Industry talk]]''
|-
|-
|-
| Mar 21, 3:30-4 PM
| 9th floor lounge
| Aidan Howells (UW-Madison)
|''[[#Mar 21, Aidan Howells| A Gentle Introduction to Chemical Reaction Network Theory]]''
|-
|-
|-
| Apr 4, 3:30-4 PM
| 9th floor lounge
| Eza Enkhtaivan (UW-Madison)
|''[[#Apr 4, Eza Enkhtaivan| Reinforcement Learning and Markov Decision Processes]]''
|-
|-
|-
| Apr 11, 3:30-4 PM
| Virtual [https://uwmadison.zoom.us/j/91217562664?pwd=SGZOS3JGaFVGa250NXhDZlkrbWU3dz09/ (link)] Passcode: 400453
| [https://www.linkedin.com/in/micky-soule-steinberg-5361a270/ Micky Steinberg] (Data Analyst at [https://www.principiaanalytics.com/ Principia Analytics])
|''[[#Apr 11, Micky Steinberg| Industry talk]]''
|-
|-
|-
|-
|
|}
|}


== Abstracts ==
== Abstracts ==


=== 9/29, Yu Feng (Math) ===
=== Feb 7, Keith Rush ===
'''Phase separation in the advective Cahn--Hilliard equation'''
I'll talk about the kind of work I do today, the way I got here, and any insight I can give for someone hoping to pursue a similar path. I'll also discuss some of the things I've learned, and some of the advantages and disadvantages a mathematician has in the machine learning and computer science world. We'll be sure to have a freewheeling discussion and a good time :).


The Cahn--Hilliard equation is a classic model of phase separation in binary mixtures that exhibits spontaneous coarsening of the phases. We study the Cahn--Hilliard equation with an imposed advection term in order to model the stirring and eventual mixing of the phases. The main result is that if the imposed advection is sufficiently mixing then no phase separation occurs, and the solution instead converges exponentially to a homogeneous mixed state. The mixing effectiveness of the imposed drift is quantified in terms of the dissipation time of the associated advection-hyperdiffusion equation, and we produce examples of velocity fields with a small dissipation time. We also study the relationship between this quantity and the dissipation time of the standard advection-diffusion equation.
=== Feb 14, Shawn Mittal ===
A short snapshot of what the data science industry looks like followed by some lessons learned on what makes an effective data scientist.


=== Feb 21,Brandon Boggess ===
I will be talking about software development and the transition from academic research to enterprise engineering.


=== 10/14, Yu Feng (Math) ===
=== Feb 28, Shi Chen ===
'''A Half-order Numerical Scheme for Nonlinear SDEs with one-sided Lipschitz Drift and Hölder Continuous Diffusion Coefficients'''
The underlying physics of the same system is different when the system is described at different scales. In classical mechanics, the motion of a particle is governed by the Newton's second law, while in quantum mechanics the status of a particle follows the Schrödinger equation. The classical mechanics and the quantum mechanics are two sides of the same coin, but how can we formally connect the two disparate systems? In this talk, I will introduce the Wigner transform, which is the only known method that seamlessly connects the classical and quantum systems as the Planck constant vanishes. I will keep everything basic and briefly introduce some applications of the Wigner transform to direct and inverse wave type problems.


We consider positivity-preserving explicit schemes for one-dimensional nonlinear stochastic differential
=== Mar 7, Tom Edwards ===
equations. The drift coefficients satisfy the one-sided Lipschitz condition, and the diffusion coefficients
I will talk about comparisons between small and big companies.
are Hölder continuous. To control the fast growth of moments of solutions, we introduce several explicit
schemes including the tamed and truncated Euler schemes. The fundamental idea is to guarantee the
non-negativity of solutions. The proofs rely on the boundedness for negative moments and exponential of
negative moments. We present several numerical schemes for a modified Cox-Ingersoll-Ross model and a
two-factor Heston model and demonstrate their half-order convergence rate.


=== Mar 14, Aidan Howells ===
We'll learn what a chemical reaction network is, with a bunch of real-world examples. There are a number of ways to model these networks as objects of mathematical study, two of which will be discussed. We'll end with a few of the questions mathematicians try to answer about these models, to give you some of the flavor of the field.


=== Apr 4, Eza Enkhtaivan ===
In recent years, Reinforcement Learning has found great success in many areas of AI research ranging from research on self-driving cars to achieving superhuman level performance in MOBA games such as Dota 2, Starcraft (Open AI) or Chess and Go (AlphaGo Zero). I will talk about the mathematical framework of Reinforcement Learning and also briefly about its applications in computational neuroscience/psychiatry as well.
=== Apr 11, Micky Steinberg ===
I will talk about a what a typical work day looks like for me, and some advice for getting a similar job coming from academia.


<br>


== Past Semesters ==
== Past Semesters ==
*[[SIAM Student Chapter Seminar/Fall2021|Fall 2021]]
*[[SIAM_Student_Chapter_Seminar/Fall2020|Fall 2020]]
*[[SIAM_Student_Chapter_Seminar/Spring2020|Spring 2020]]
*[[SIAM_Student_Chapter_Seminar/Spring2020|Spring 2020]]
*[[SIAM_Student_Chapter_Seminar/Fall2019|Fall 2019]]
*[[SIAM_Student_Chapter_Seminar/Fall2019|Fall 2019]]
*[[SIAM_Student_Chapter_Seminar/Fall2018|Fall 2018]]
*[[SIAM_Student_Chapter_Seminar/Fall2018|Fall 2018]]
*[[SIAM_Student_Chapter_Seminar/Spring2017|Spring 2017]]
*[[SIAM_Student_Chapter_Seminar/Spring2017|Spring 2017]]

Revision as of 01:14, 10 April 2022



Spring 2022

date and time location speaker title
Feb 7, 3:30-4 PM Virtual (link) Keith Rush (Senior Software Engineer at Google) Industry talk
Feb 14, 3:30-4 PM Virtual (link) Passcode: 400453 Shawn Mittal (Senior Deliver Data Scientist at Microsoft) Who, What, Why of Data Science in Industry
Feb 21, 3:30-4 PM 9th floor lounge Brandon Boggess (Epic) Industry talk
Feb 28, 3:30-4 PM 9th floor lounge Shi Chen (UW-Madison) Classical limits of direct and inverse wave type problems -- a Wigner transform approach
Mar 7, 3:30-4 PM Virtual (link) Passcode: 400453 Tom Edwards (Software Engineer at Google) Industry talk
Mar 21, 3:30-4 PM 9th floor lounge Aidan Howells (UW-Madison) A Gentle Introduction to Chemical Reaction Network Theory
Apr 4, 3:30-4 PM 9th floor lounge Eza Enkhtaivan (UW-Madison) Reinforcement Learning and Markov Decision Processes
Apr 11, 3:30-4 PM Virtual (link) Passcode: 400453 Micky Steinberg (Data Analyst at Principia Analytics) Industry talk


Abstracts

Feb 7, Keith Rush

I'll talk about the kind of work I do today, the way I got here, and any insight I can give for someone hoping to pursue a similar path. I'll also discuss some of the things I've learned, and some of the advantages and disadvantages a mathematician has in the machine learning and computer science world. We'll be sure to have a freewheeling discussion and a good time :).

Feb 14, Shawn Mittal

A short snapshot of what the data science industry looks like followed by some lessons learned on what makes an effective data scientist.

Feb 21,Brandon Boggess

I will be talking about software development and the transition from academic research to enterprise engineering.

Feb 28, Shi Chen

The underlying physics of the same system is different when the system is described at different scales. In classical mechanics, the motion of a particle is governed by the Newton's second law, while in quantum mechanics the status of a particle follows the Schrödinger equation. The classical mechanics and the quantum mechanics are two sides of the same coin, but how can we formally connect the two disparate systems? In this talk, I will introduce the Wigner transform, which is the only known method that seamlessly connects the classical and quantum systems as the Planck constant vanishes. I will keep everything basic and briefly introduce some applications of the Wigner transform to direct and inverse wave type problems.

Mar 7, Tom Edwards

I will talk about comparisons between small and big companies.

Mar 14, Aidan Howells

We'll learn what a chemical reaction network is, with a bunch of real-world examples. There are a number of ways to model these networks as objects of mathematical study, two of which will be discussed. We'll end with a few of the questions mathematicians try to answer about these models, to give you some of the flavor of the field.

Apr 4, Eza Enkhtaivan

In recent years, Reinforcement Learning has found great success in many areas of AI research ranging from research on self-driving cars to achieving superhuman level performance in MOBA games such as Dota 2, Starcraft (Open AI) or Chess and Go (AlphaGo Zero). I will talk about the mathematical framework of Reinforcement Learning and also briefly about its applications in computational neuroscience/psychiatry as well.

Apr 11, Micky Steinberg

I will talk about a what a typical work day looks like for me, and some advice for getting a similar job coming from academia.


Past Semesters