Virginia Tech Department of Mathematics

I would like to thank the Virginia Tech Department of Mathematics for hosting me today. I was humbled to be in the presence of such outstanding and productive faculty including Department Chair Sarah Reznikoff and instructor Daniel Kim, PhD. I presented on Predictive Digital Forensics and the students were fabulous.

The Virginia Tech Department of Mathematics is hosting our next Math Career Connections Series Event on March 19! Virginia Tech College of Science

Offered Admission to VT Math for the 2025-2026 Academic Year? Congrats!! Join us for our upcoming Math Preview Day event on April 4! ?? meet Math Department academic advisors ?? tour Orion Science Living-Learning Community ?? eat lunch with VT math majors in a campus dining hall ?? meet Math Department faculty and Chair ?? take an optional self-guided campus tour Register now: https://lnkd.in/eCSRc2Z5 Virginia Tech College of Science

Thank you so much Center for Communicating Science at Virginia Tech for giving me the opportunity to talk a bit about what I have been doing as a postdoc! It was an amazing experience and I am happy to share with people the cool things that happen in mathematical biology. If you want to watch the full video: https://lnkd.in/gpfEYuHv

Join us for our next Math Career Connections Series Event! Trigger Warning:?The focus of this talk is predictive forensics; however, the abstract discusses the dark web and includes references to images and videos of child abuse. No presentation, description, or discussion of actual child abuse content is included in the talk. Freenet is a shadow version of the Internet, protected by complex encryption schemes and complex protocols. It allows users to remain completely anonymous.?While created to promote and defend free speech for the oppressed around the world, Freenet has become a haven for dark web criminal activity. Anything goes on Freenet: murder for hire, illegal drug sales, gun running, …. the options are endless. However, the most common activity on Freenet, by far, is the illicit trading of media depicting child abuse. Freenet has been shielding the purveyors of child abuse images and videos for decades. Most of the traders are technically sophisticated and paranoid.?Breaking into trafficking rings has proven difficult for law enforcement.?However, in 2017, researchers from the University of Massachusetts at Amherst and the Rochester Institute of Technology devised a statistical attack that promised to identify downloaders of child abuse media … to a certain degree of certainty. The attack was not without controversy. Is the math valid? Does it even work in real life? Will it pass legal muster for action by law enforcement? Will judges sign off on search warrants based on research conducted in a far-off university setting? There were many questions. This talk will teach us about Freenet, the attack, and the debate over its validity. A case study in predictive forensic analysis will highlight the mathematical, legal, and tactical aspects of a particular investigation. Did mathematics help put a criminal away? Let’s find out. Our speaker, Special Agent Victor "Jake" Olesen, recently retired as a Digital Forensics Examiner for the Federal Bureau of Investigation (FBI).?He has over 20 years of experience investigating Internet crimes, where he served both the San Diego and Richmond Field Offices. His expertise includes computer intrusion/hacking investigations, especially those that target large-scale international cybercrime syndicates. As a senior manager in the Operational Technology Division, Special Agent Olesen developed and deployed high-tech solutions to overcome various computer and network exploitation challenges. Virginia Tech College of Science Victor "Jake" Olesen

It was great to learn about so many developments on reduced order modeling (#ROM) for #CFD problems during our mini-symposium at #SIAMCSE25 ! We covered a lot in 2 sessions: Galerkin ROM, data-driven ROM, analysis and computations for low and high-speed flows. Thanks to the speakers for making it a success: Xiaolong He, Bipin T., Patrick Blonigan, Medine Demir, Jorge Reyes, Ian Moore, Xuping Xie, Tyson Ofstie And to my co-organizers Gianluigi Rozza and Traian Iliescu!

Congratulations Virginia Tech Department of Mathematics professor Andy Norton! Virginia Tech College of Science

?? What an incredible weekend at Virginia Tech’s Open House! ?? We had an amazing time connecting with prospective Hokies and their families, sharing exciting opportunities within our department. A huge shoutout to our wonderful student ambassadors who shared their passion and insights. Thanks to all who joined us! We can’t wait to see some of you as future members of the VT math community! ???? #VTMath #FutureHokies #OpenHouse #VirginiaTech #MathDepartment #HokieNation #StudentAmbassadors Virginia Tech College of Science

?? Exciting news! Our work, "???????????????? ???????????????? ?????? ?????? ?????????????????? ???????????????? ?????????????????? ???? ????????-?????????? ???????????? ?????????????? ??????????????," is now published in SIAM Journal on Scientific Computing! ?? We developed a strategy to smartly ?????????????? ???????????????????????????? ?????????? ?????? ???????????? ???????????? ??????????, preventing unnecessary iterations and saving computational cost—?? ?????????????? ?????????????????????? ?????? ????????-?????????????????????? ??????????????????! ?????????????????? ?????????????????????? ???? ???????? ???????? ?????????????? ????????????????, and we provide ?????????????????????? ?????????? of its reliability and efficiency. ?? A simple example: With our stopping criterion, ?????? ?????????????????? ?????????? ???? ?????? ? ?????????? ?????????? ?????????????? ???? ?????? ? ???????? ??????????, where the residual norm-based criterion would stop—???????????? ???????? ?????????????? ?????????????????????? ????????????????! ?? ???????? ???? ?????????? ???? ???????? ???????????? ????????????? ?? https://lnkd.in/eHKSnDMK #ScientificComputing #HPC #FiniteElements #LinearSolvers

Join us at our next Math Career Connections Series event! Our speaker, Dr. Marissa Renardy graduated from Virginia Tech with a B.S. in Mathematics in 2012 and an M.S. in Mathematics in 2013. She then pursued graduate studies at The Ohio State University, focusing on uncertainty quantification, numerical methods for PDEs, and mathematical biology. She graduated with a PhD in Mathematics in 2018. She then moved to the University of Michigan as a postdoctoral research fellow working on mathematical models of tuberculosis infection and epidemiology. In August 2020, while still working on her postdoctoral research, Marissa began part time work at Applied BioMath providing modeling services to support drug development. In March 2021, Marissa transitioned to a full-time position at Applied BioMath. In July 2024, Marissa joined GSK as Associate Director of Quantitative Systems Pharmacology. Virginia Tech College of Science