Program

See below information of the special sessions, social events, instructions for the presenters and the full conference program.

Program

Changes in the program:

Tuesday 13.12. at 14:00-14:30: A. Lehikoinen’s talk is cancelled
Wednesday 14.12. at 10:40-11:00: J. Poimala’s talk is given by A. Hauptmann
Wednesday 14.12. at 14:30-14:50: A. Mikkonen’s talk is cancelled
Wednesday 14.12. Pitch talk by A. Hauptmann is cancelled
Friday 16.12. at 10:00-10:20: The talk will be given by E. Pasca and J. Sauer Jørgensen

Special sessions

Free word Tuesday 17:30-19:00. Mic is open. Share your memories, anecdotes and photographs of Jari.
Short talks Wednesday 15:10-17:00. In the spirit of Inverse days, we’re going to be experimental, and try out a new session form; one of the afternoon sessions will consist of short talks (5 min pitches on your research topics). This special session is meant to be a relaxed one — also the bar will be open.
Industrial session Thursday 10:00-12:00. Over the years, the Inverse Days has seen several presentations by company representatives among the other presentations, without any special sessions or forums. This year we decided to start a new dedicated session called the Industrial session, the aim of which is to provide a centralised forum for companies to present their scientific research to the other conference participants. The purpose of the forum is to act as a good conversation starter for increasing co-financed research activities between companies and academic sector, and on the other hand to increase the companies’ visibility for academic researchers and vice versa.
Helsinki tomography challenge Friday 9:50-11:00. In 2022, the Inverse Problems Research Group at the University of Helsinki organised the Helsinki Tomography Challenge. The task of the challenge was to compute high-quality reconstructions in limited angle X-ray tomography with increasingly difficult datasets measured in our X-ray laboratory. We received 9 entries and saw some truly astounding results. In this special session, the top 3 contestant teams will talk about their reconstruction techniques and solutions.

Social events

Ice breaker, Monday, December 12, 2022, 19:00-, Restaurant Hillside
Get-together for postdocs and PhD students. Bowling (included in conference registration fee) at Tahko Spa Hotel, Wednesday December 14, 2022 at 18:00-20:00
Conference dinner, Thursday, December 15, 2022. 19:00-, Restaurant Hillside

Program

Monday 12.12.

12:30- 12:30-14:30	Registration Lunch
14:30-14:45	Yläsali Opening
	(chair: R. Nicholson)
14:45-15:30	Erkki Somersalo: TBA
15:30-16:15	Daniela Calvetti: TBA
16:15-16:45	Coffee
	Yläsali (chair: V. Kolehmainen)
16:45-17:30	Matti Lassas: Mapping properties of neural networks and inverse problems
17:30-18:15	Heikki Haario: Quantifying unpredictable processes

19:00-	Ice breaker Restaurant Hillside

Tuesday 13.12.

	Yläsali (chair: M. Vauhkonen)
10:30-11:15	Ruanui Nicholson: On linear surrogate models with the Bayesian approximation error apporoach
11:15-12:00	Ville Kolehmainen: TBA
12:00-13:30	Lunch
	Yläsali (chair: T. Tarvainen)
13:30-14:00	Tero Karjalainen: Inverse Problem called the Department of Applied Physics
14:00-14:30	Break (talk is cancelled)
14:30-14:45	Break
	Yläsali (chair: T. Lähivaara)
14:45-15:30	Simon Arridge: Adventures in approximation error
15:30-16:15	Peter Monk: The time domain linear sampling method
16:15-16:45	Coffee
	Yläsali (chair: A. Seppänen)
16:45-17:30	Nuutti Hyvönen: Edge-promoting sequential Bayesian experimental design for X-ray imaging
17:30-17:45	break (bar opens)
17:45-19:00	Free word: anecdotes inverse problems, Jari, life, the universe and everything

Wednesday 14.12.

	Yläsali (chair: E. Blåsten)	Raili+Hymy (chair: N. Hänninen)
8:30-8:50	Giovanni Covi: An inverse problem in fractional elasticity	Simon Hubmer: Phase-contrast THz-CT for non-destructive testing
8:50-9:10	Jaakko Kultima: Fixed angle scattering for nonlinear biharmonic operator	Elli Karvonen: Estimating the singular support of the limited-angle tomographic reconstruction using persistent homology
9:10-9:30	Takashi Furuya: Local recovery of a piecewise constant anisotropic conductivity in EIT on domains with exposed corners	Nargiza Djurabekova: A one-step approach for retrieval and reconstruction of phase contrast X-ray data
9:30-10:00	Coffee
	Yläsali (chair: A. Hauptmann)	Raili + Hymy (chair: V. Kaarnioja)
10:00-10:20	Arttu Arjas: On model correction in inverse problems	Jyrki Jauhiainen: Mumford-Shah regularization in electrical impedance tomography with complete electrode model
10:20-10:40	Antti Autio: A subspace surrogate model for electrical impedance tomography	Siiri Rautio: New insight to EIT reconstruction using virtual X-rays
10:40-11:00	Andreas Hauptmann: Model corrected primal-dual deep equilibrium models for photoacoustic tomography	Hjørdis Schlüter: Conductivity reconstruction towards higher genus surfaces
11:00-11:20	Jakob Sauer Jørgensen: CUQIpy: A new Python platform for computational uncertainty quantification for inverse problems	Petri Kuusela: Using multi-frequency electrical impedance tomography (MFEIT) without phase data to reconstruct complex conductivity distribution
11:20-11:40	Jalo Nousiainen: Data-driven control methods for eXtreme a daptive optics	Aksel Rasmussen: A Bayesian approach for inclusion detection using parametrisations
11:40-12:00	Michael Puthawala: Invertible machine learning architectures for inverse problems
12:00-13:30	Lunch
	Yläsali (chair: T. Valkonen)	Raili+Hymy (chair: P. Raumonen)
13:30-13:50	Vesa Kaarnioja: Quasi-Monte Carlo for Bayesian optimal experimental design	Josef Durech: Reconstruction of the shape and spin-state model of potentially hazardous asteroid Apophis
13:50-14:10	Matti Vihola: On the inference of hidden Markov models with weakly informative observations	Emilia Blåsten: Imaging water supply networks and vocal tracts
14:10-14:30	Ensio Suonperä: Bilevel optimization with single-step inner methods	Silja Lønborg Christensen: Bayesian separation of small and large features for defect detection in CT of subsea pipes
14:30-14:50	Bjørn Jensen: A first-order optimisation method with parallel adaptive pde constraint solver	Antti Mikkonen: The effect of aerosols for carbon dioxide emission plume retrieval
14:50-15:20	Coffee
	Yläsali (chair: A. Seppänen)
15:15-15:30	break (bar opens)
15:30- 17:00	Pitch talks: Johanna Tamminen: Satellites today and tomorrow Antti Kukkurainen: Disentangling vegetation fluorescence signal from space-based measurements of reflected solar radiation Manuel Cañizares: Determination of delta-shell and critically-singular potentials with local near-scattering data Teemu Sahlström: Utilizing variational autoencoders in the Bayesian inverse problem of photoacoustic tomography Puyuan Mi: How to quantify model error break Samuli Siltanen: Towards perception-aware image restoration Anssi Manninen: Sparsity promoting reconstructions via hierarchical prior models in diffuse optical tomography Kenneth Scheel: Towards uncertainty quantification for magnetic resonance electrical impedance tomography Andreas Horst: Uncertainty quantification for inverse problems with Besov prior Jasper Everink: A non-Bayesian approach to uncertainty quantification for inverse problems Rafael Flock: Certified coordinate selection for Bayesian inversion Jose Rodrigo Rojo Garcia: Optimal experimental design in chromatography

18:00-20:00	Event for postdocs & PhD students Bowling at Tahko SpaHotel

Thursday 15.12.

	Yläsali (chair: L. Oksanen)
8:30-9:00	Tapio Helin: TBA
9:00-9:30	Joonas Ilmavirta: Geophysics and algebraic geometry
9:30-10:00	Coffee
	Yläsali (chair: M. Vauhkonen)		*Raili+Hymy* (chair: M. Mozumder)
10:00-10:10	Industrial session Introduction	10:00-10:20	Alexander Meaney: Experimental and computational resources for computed tomography research at the University of Helsinki
10:10-10:35	Planmeca (H. Agrawal): Metal artifact correction in cone beam computed tomography using synthetic X-ray data	10:20-10:40	Eero Koponen: Background-oriented schlieren imaging for measuring ultrasound fields
10:35-11:00	Rocsole (M. Hosseini): Interface estimation in a three-phase separator using a tomographic profiler	10:40-11:00	Pauliina Hirvi: Diffuse optical imaging of the preterm neonate brain with a full-term neonate atlas model
11:00-11:25	Planmed (M. Lilja): Recent R & D topics in mammography and CBCT imaging	11:00-11:20	Joel Enwald: Comparison of methods for fitting gaussian curves to edge-illumination data
11:25-11:50	Kuava (T. Lähivaara): Coupled finite element and ultra-weak variational formulation for Maxwell equations	11:20-11:40	Malo Valmalle: Local-global DVC analyses confirm theoretical predictions for deformation and damage onset in torsion of pantographic metamaterial
12:00-13:30	Lunch
	Yläsali (chair: J. Jauhiainen)		Raili+Hymy (chair: J. Ilmavirta)
13:30-13:50	Lena Zdun: Dynamic magnetic particle imaging: accurate reconstructions by simultaneous motion estimation		Alexey Kazarnikov: Bayesian approach to parameter identification of pattern formation models
13:50-14:10	Muhammad Ziaul Arif: Dual modal imaging of two-phase flows using electromagnetic flow tomography and electrical tomography – state estimation approach		Duc-Lam Duong: Stability estimates for the expected utility in Bayesian optimal experimental design
14:10-14:30	Tommi Heikkilä: Practical dynamic tomography		Pu-Zhao Kow: Reconstruction of an impenetrable obstacle in anisotropic inhomogeneous background
14:30-14:50	Stephanie Blanke: Field-free line magnetic particle imaging: artifact reduction for time-dependent tracer concentrations		Suman Sahoo: The anisotropic Calderón problem at large fixed frequency on manifolds with invertible ray transform
14:50-15:20	Coffee
15:15-16:15			Raili+Hymy Women in inverse problems
16:30-18:00	Yläsali Annual meeting of the Finnish Inverse Problems Society (FIPS)

19:00-	Conference dinner Restaurant Hillside

Friday 16.12.

	Yläsali
8:20-8:30	Finnish Inverse Prize
	(chair: C. Brandt)
8:30-9:00	Ekaterina Sherina: Subaperture-based digital aberration correction for optical coherence tomography
9:00-9:30	Tuomo Valkonen: Point source localisation—Lasso on measures: how to do it?
9:30-9:50	Coffee
	Yläsali (chair: A. Meaney)
9:50-10:00	Helsinki tomography challenge Overview
10:00-10:20	Edoardo Pasca (Scientific Computing Department of UK Research and Innovation – Science Technology Facilities Council) & Jakob Sauer Jørgensen (Technical University of Denmark (DTU))
10:20-10:40	Alexander Konstantin Denker (University of Bremen)
10:40-11:00	Jan Robine (Technical University Dortmund) & Thomas Germer (Heinrich Heine University Düsseldorf)
11:00	Closing of the conference
11:00-12:30	Lunch

Instructions for the Presenters

Each session room is equipped with a Windows PC/laptop with Internet access, an audio system, and a data projector. Please bring your presentation on a USB flash drive/memory stick. To minimize technical difficulties, we recommend using a PDF or PowerPoint presentation. Each computer has a Windows media player if you wish to play video/sound clips.

Please note that it is recommended to use the computer of the session room, but if you want to use your own computer, the connectivity of the hardware should be tested well in advance of the start of the session. Furthermore, if you intend to use your own Mac computer, please bring your adapters for connecting your laptop to the data projector.

To minimize the possibility of technical problems, it is recommended that you upload your files or test your computer on the break before your session starts.