### international Traveling Workshop on Interactions between Sparse models and Technology

international Traveling Workshop on Interactions between Sparse models and Technology

On the 24^{th} to 26^{th} of August 2016, we are organising a workshop called *international Traveling Workshop on Interactions between Sparse models and Technology* (iTWIST). iTWIST is a biennial workshop organised by a cross-European committee of researchers and academics on theory and applications of sparse models in signal processing and related areas. The workshop has so far taken place in Marseille, France in 2012 and in Namur, Belgium in

2014.

I was very excited to learn last fall that the organising committee of the previous two instalments of the workshop had the confidence to let Morten Nielsen and me organise the workshop in Aalborg (Denmark) in 2016.

## Themes

This year, the workshop continues many of the themes from the first two years and adds a few new:

- Sparsity-driven data sensing and processing (e.g., optics, computer vision, genomics, biomedical, digital communication, channel estimation, astronomy)
- Application of sparse models in non-convex/non-linear inverse problems (e.g., phase retrieval, blind deconvolution, self calibration)
- Approximate probabilistic inference for sparse problems
- Sparse machine learning and inference
- “Blind” inverse problems and dictionary learning
- Optimization for sparse modelling
- Information theory, geometry and randomness
- Sparsity? What’s next?
- Discrete-valued signals
- Union of low-dimensional spaces,
- Cosparsity, mixed/group norm, model-based, low-complexity models, …

- Matrix/manifold sensing/processing (graph, low-rank approximation, …)
- Complexity/accuracy tradeoffs in numerical methods/optimization
- Electronic/optical compressive sensors (hardware)

I would like to point out here, as Igor Carron mentioned recently, that HW designs are also very welcome at the workshop – it is not just theory and thought experiments. We are very interested in getting a good mix between theoretical aspects and applications of sparsity and related techniques.

## Keynote Speakers

I am very excited to be able to present a range of IMO very impressive keynote speakers covering a wide range of themes:

- Lieven Vandenberghe – University of California, Los Angeles – homepage
- Gerhard Wunder – TU Berlin & Fraunhofer Institute – homepage
- Holger Rauhut – RWTH Aachen – homepage
- Petros Boufounos – Mitsubishi Electric Research Labs – homepage
- Florent Krzakala and Eric Tramel – ENS Paris – homepage
- Phil Schniter – Ohio State University – homepage
- Karin Schnass – University of Innsbruck – homepage
- Rachel Ward – University of Texas at Austin – homepage
- Bogdan Roman – University of Cambridge – homepage

The rest of the workshop is open to contributions from the research community. Please send your papers (in the form of 2-page extended abstracts – see details here). Your research can be presented as an oral presentation or a poster. If you prefer, you can state your preference (paper or poster) during the submission process, but we cannot guarentee that we can honour your request and reserve the right to assign papers to either category in order to put together a coherent programme. **Please note that we consider oral and poster presentations equally important – poster presentations will not be stowed away in a dusty corner during coffee breaks but will have one or more dedicated slots in the programme!**

## Open Science

In order to support open science, we strongly encourage authors to publish any code or data accompanying your paper in a publicly accessible repository, such as GitHub, Figshare, Zenodo etc.

The proceedings of the workshop will be published in arXiv as well as SJS in order to make the papers openly accessible and encourage post-publication discussion.