Last month the greatest event in Inverse Problems ever took place in Helsinki: the Applied Inverse Problems 2015 conference. In addition, I gave my first technical presentation at the 4D tomography minisymposium (find the slides here). I take the chance to write a series of posts as a walkthrough of my project and its current state. The project When […]
Category: experimental math
The "Helsinki walnut" dataset

Our research group has made an open access dataset for image reconstruction available at the following link: www.fips.fi/dataset.php The measurement data was collected and documented by K. Hämäläinen, L. Harhanen, A. Kallonen, A. Kujanpää, E. Niemi and S. Siltanen. Our group used the walnut data for testing several tomographic reconstruction algorithms, as you can see […]
EXTREMA COST action: live from Leiden

This week I am taking part to the workshop at Lorentz Center (Leiden, The Netherlands) "Artefacts in X-ray tomography". The workshop is part of the COST action, a European framework that allocates funds for multidisciplinary innovative projects, stimulating an active and fruitful collaboration among European researchers and professionals. This is my third workshop of the EXTREMA […]
Creating a voice: a challenging inverse problem (part 2)

(a continuation of this previous post) In this post, I will describe how the human voice is produced and why this is useful to the approach of the Inverse Problems Group at University of Helsinki. Our voice is produced by air flowing from our lungs through our vocal folds and vocal tract. Vocal folds - commonly known as […]
Research idealism VS real world

Have you ever had the experience of a kid who asks you a candid and simple question, that has a complicated answer? The kind of question like "Why we have so much and there are kids starving in India?", where you think "I wish the world was so simple and fair, like the spirit with […]
Creating a voice: a challenging inverse problem (part 1)

This month you can read about an exciting inverse problem on the new issue of Physics World. Professor Samuli Siltanen from University of Helsinki was interviewed regarding the current research in Finland for synthesizing speech and creating artificial voice. This study is part of a big research project in Finland, connecting University of Helsinki, University of Tampere, […]
What if getting cancer is mostly about bad luck?

Few days ago, Science published a groundbreaking research by Tomasetti and Vogelstein from Johns Hopkins University, hinting how getting cancer is significantly a matter of bad luck (*). The authors focus on stem cells and their divisions, and by applying some statistics, show that there is a strong correlation between such repeated process and the development of cancer. […]
Transmission eigenvalues: promising for applications? (part II)

I have been working with transmission eigenvalues for the past 2 years, before turning to sparse tomography. If you do not know what I am talking about, read this brief introduction first. A breakthrough in such field was reached when the question whether transmission eigenvalues and non-scattering energies coincide or not (*) was solved. The […]
Mathematics and breast cancer prevention

Few days ago I came across this sad and beautiful website: The battle we didn't choose: my wife's battle with breast cancer (*) Angelo Merendino is a photographer based in Cleveland. Angelo and his wife Jennifer's story is moving: love at first sight (at least from Angelo's side :)), soon culminated to a wedding in Central […]
5 upcoming events for Inverse Problems you cannot miss
The following months will be really rich in events regarding Inverse Problems, either if you want to get acquainted with such field or if you are looking for new stimulating collaborations. Here is a small collection of some of the upcoming happenings. Inverse Days 2014 - 20th anniversary Tampere University of Technology is organising this year Inverse […]