Bayreuth hosts MTNS 2022

posted on: September 15, 2022

Yesterday was day 3 of the 25th International Symposium on Mathematical Theory of Network and Systems, a premier venue for research contributions in mathematical systems theory, networks and control, taking place in Bayreuth this year. In the morning, I had the great opportunity to take part in the invited session Control in and Around Human-Computer Interaction and present my work on optimal control of acoustic levitation interfaces. This was the first time presenting this exciting, but also challenging application use case for control methods to a mathematics audience. I received some great impulses for potential directions to explore in future work.

The afternoon was reserved for sightseeing and excursions around the city. Even though I've been a 'Bayreuthian' for a couple of years now, the tour was still quite informative, with the highlight of visiting the interior of the Festspielhaus (Bayreuth Festival Theater), known for its great acoustics and the unusual orchestra pit.

Impressions of SIGGRAPH 2022

posted on: August 29, 2022

It's been a bit over two weeks since I returned back from the SIGGRAPH. With over 11 000 attendees, this was the biggest conference I attended so far. For such a large event, I was amazed by the impeccable organization. I am very grateful for the opportunity to see many inspiring talks, experience great demos, and have face-to-face conversations with researchers, artists, and creators. My personal favorite was seeing all the latest developments and advancements in holographic displays.

Also, I got to present our work on computing Optimal Trajectories for Acoustic Levitation Displays in the technical papers track, which this year took place in a slightly different format than previously. After presenting a summarized version of the video talk, the audience members could walk up to the authors of the papers in the particular session and have a roundtable discussion. I really appreciated the close interaction with the audience. I received great feedback and some excellent questions. The attendees were curios about how acoustic levitation technology works and what the future for (and with) acoustic levitation displays might look like.

The full pre-recorded video talk is available here.

Vancouver was a great host city. With the calm Stanley Park and the surrounding beaches, it provided the perfect setting for short academic retreats.

The conference venue
Turing Award Lecture
In-person presentation of the OptiTrap technical paper
English Bay Seawall in Vancouver
Burrard Street Bridge in Vancouver
A demonstration of a collaborative drawing of a user and a robot
OptiTrap poster put up for the roundtable discussion
the Gastown Steam Clock in Vancouver

OptiTrap goes to SIGGRAPH

posted on: March 9, 2022

Recently, I've been working on an algorithm that would compute optimal placements of acoustic traps such that a levitated particle would follow a pre-defined path as close as possible, based on a mathematical model of the trap-particle dynamics.

Now I am happy to announce that the paper describing this algorithm, that I named OptiTrap (i.e., Optimal Trapping of Levitated Particles), has been accepted to the Transactions on Graphics journal and it can already be found here.

OptiTrap allows the rendering of larger and more complex visual content on acoustic levitation displays than previously demonstrated, such as the almost 9 cm wide holographic fish shown bellow.

An image of a blue fish, created by an illuminated, rapidly-moving, levitated particle.
Volumetric graphics generated by rapidly moving a levitated particle in an acoustophoretic display.

In addition, I will have the opportunity to present this work at this year's SIGGRAPH conference. This would be my first time attending the conference and I am looking forward to all the inspiring new research in computer graphics and interaction.