I gave a talk at the applied math colloquium of Columbia University. My colleagues Liliana Borcea and Kui Ren work there as professors. There were some 30 people in the audience, with lots of young researchers. My topic was my team’s new research on the surprising connections between electrical impedance tomography and classical X-ray tomography.
I had the honor to deliver a keynote address in the Science on Stage Festival in Turku, Finland, on August 15,2024. The title of the talk was The magic of math: three-dimensional X-ray vision. You can see the recording in YouTube. The lecture slides are available here in PDF format. Abstract: In the 1970’s, a
I had a wonderful short trip to Edinburgh to give two talks in the Big Data Inverse Problems conference at the International Centre for Mathematical Sciences. The event took place in the amazing Bayes Centre. Here’s a peek: My first talk was a traditional scientific presentation with the topic Virtual X-rays: parallel-beam tomography hidden within
I delivered my X-ray tomography show at the Finnish Mathematical Society colloquium on April 17, 2024. The presentation was followed by Zoom all over Finland, and the lecture hall at University of Helsinki was pretty full, too. This was fun!
I delivered a section plenary talk in the 94th GAMM Annual Meeting in Magdeburg on March 19, 2024. The title of my talk was Virtual X-rays: parallel-beam tomography hidden within electric probing, and it belonged to the Section S21 Mathematical signal and image processing, organized by Anne Wald and Johannes Maly. You can download my
This video illustrates “ill-posedness”, the nemesis of all inverse problems. We see how in a very simple 12×12 pixel tomography problem “almost-ghosts” can produce very different targets with almost the same X-ray data.
I started a new video series in my all-English YouTube channel called “Professor Sam”. Today’s upload is Tomography 201: tomography by pixels, which introduces the need for iterative variational regularization in tomographic image reconstruction with sparsely collected data. This 200-series of videos is a continuation of the 100-series explaining the basics of tomography.
I had the pleasure to visit the Institute of Mathematics for Industry (IMI) in the city Fukuoka located in the Kyushu island of Japan. The visit took place on January 9, 2024. My curiosity about IMI had been high for a while since I am a Professor of Industrial Mathematics at the University of Helsinki.
The Applied Tumor Genomics Research Program of University of Helsinki held a seminar day on October 6, 2023. They asked me to deliver a presentation about artificial intelligence and neural networks. It was my great pleasure to do so! The first part of my talk was about ChatGPT and generative text AI. I followed the
The AIP conference is the main scientific event in the field of inverse problems. It is held every two years, apart from a break during the Covid19 pandemic. Actually I have organized one myself, in 2015 in Helsinki. This year the conference was held in Göttingen, Germany, a classic scientific hub before the second world
