AVI 2008

Although it’s a bit late (almost a month after the facts), I finally found some time to blog about Advanced Visual Interfaces (AVI) 2008 in Naples, where Jan presented our paper about Gummy.


I liked it very much: the conference had good quality papers but was still reasonably small (around 150 attendants), and of course the weather and the Italian food were great :-) We arrived on Tuesday which gave us some time to explore the city and take the ferry to Capri (a great suggestion by Robbie).


I am not going to discuss the conference program into detail this time, but will just highlight a couple of interesting papers. Possibly one of the coolest papers was “Exploring Video Streams using Slit-Tear Visualizations” by Anthony Tang (video). Another presentation I enjoyed was “TapTap and MagStick: Improving One-Handed Target Acquisition on Small Touch-screens” by Anne Roudaut (video). It seems there is lots of related work in this area (e.g. ShiftThumbSpace, etc.). Peter Brandl presented two interesting papers: Bridging the Gap between Real Printouts and Digital Whiteboards and Combining and Measuring the Benefits of Bimanual Pen and Direct-Touch Interaction on Horizontal Interfaces. He was brave enough to do an impressive live demo for the first paper :-) Oh, and he also covered the conference in a blog post.

The first paper in our session, titled “A Mixed-Fidelity Prototyping Tool for Mobile Devices” by Marco de Sá, introduced a tool to easily design prototypes and evaluate them in real-life situations. The system was well thought out and serves a real need. I can imagine that we could use this kind of tool in a user-centered UI design course. The second paper in our session was “Model-based Layout Generation” by Sebastian Feuerstack. I already met Sebastian at CADUI 2006. They presented a generic layout model based on constraints. It reminded me a bit of the layout model Yves worked on for our EIS 2007 paper. They used the Cassowary constraint solver, which I also used for my MSc thesis on constraint-based layouts for UIML. Sebastian told me he got the idea from my demo at CADUI 2006. I forgot to add a certain constraint (the layout of the UI was thus underconstrained), which by coincidence had no effect on the user interface everytime I tested it. Of course, when I showed the demo it did have an effect :-) This clearly illustrated that constraint solvers are sometimes unpredictable (see Past, present, and future of user interface software tools by Myers et al.). Sebastian’s solution to this problem was to hide the constraints from the designer and generate them automatically from a graphical layout model.

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Juan Manuel Gonzalez Calleros — who I met at CADUI 2006, TAMODIA 2006 and a few other occasions — presented a poster and a paper at the workshop on haptics. He took a few pictures while Jan was presenting (thanks again Juan!). Here are Juan and Jan discussing UsiXML vs UIML ;-)


Overall, the comments on our work were positive, although of course one of the biggest problems is still the lack of support for multi-screen interfaces. As Jan is actively hacking on Gummy these days, I don’t think it will take very long for this to be included in the tool :-)

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