ebook, tangibe programming, iPhones bring back wired telephony

Having used the Sony PRS-505 now for a few weeks (mainly to read dissertations and project reports) I have quickly gotten used to carrying less weight. The user interface requires some learning – as the screen is pretty slow pressing a button does not give immediate feedback and that feels strange – more than expected. I wonder if there are studies on traditional interacton with electronic paper? Another issue: it seems to depend on the crew whether or not it is OK to read from an eBook during the entire flight (including take-off and landing)…

While reading a thesis I was reminded of an interesting paper on tangible programming [1] from a special issue of Personal and Ubiquitous Computing we did in 2004. The paper situates the topic historically and gives an interesting introduction.

In recent meetings as well as in airports around the world one can observe a trend: wired telephony! Whereas people with traditional mobile phone walk up and down and talk on the phone iPhone users often sit wired up to the next power plug an phone… seems apple has re-invented wired telephony 😉 and other brands will soon follow (make sure to reserve a seat with a power connection).

[1] McNerney, T. S. 2004. From turtles to Tangible Programming Bricks: explorations in physical language design. Personal Ubiquitous Comput. 8, 5 (Sep. 2004), 326-337. DOI= http://dx.doi.org/10.1007/s00779-004-0295-6

Christmas market in Essen

Going to Christmas market is in Germany a tradition – and obviously our group went, too 😉
It is interesting that most of us had time for this „appointment“ with only two days notice – usually it takes us weeks to find a date for a meeting and so far we did not find a date for a strategy meeting in the near future. Perhaps offering GlĂźhwein (that is what you drink at Christmas markets) would help…
The quality of photos taken with a mobile phone is in difficult context (e.g. night, lights around) still not satisfactory (even with 5MP, downscaling, and image enhancing).

Lucia and Thomas from Vodafone R&D visiting

Lucia Terrenghi and Thomas Lang from Vodafone R&D in Munich visited our lab. We talked at lot about the future role of mobile devices and in particular how they may change personal computing in the near future. 

After lunch they gave a talk for our students describing Vodafone research and their particular research interests. Using a nice visualization of train lines they showed the research themes and introduced some of their research foci. One area of interest is electronic paper, resulting future devices and potential applications and services. In the discussion I briefly mentioned that I had a look at some of the displays with my microscope – have a look in the previous blog post if you are interested.

Christian Kray visits our Lab

Christian Kray and I were colleagues in Lancaster for a very short time – he just joined the university when I left for Munich. After his post-doc in Lancaster he moved to a position in Newcastle.

His work at the cross roads of mobile interaction and public displays is very exciting. In particular he investigates interesting concepts related to visual codes – some aspects to these ideas are discussed in “Swiss Army Knife meets Camera Phone” [1]. His new prototypes are really cool and I look forward to see/read more about them.

We realized that there are many areas where we have common interests. Perhaps there is a chance in the future to work together on some of the ideas discussed!

[1] Swiss Army Knife meets Camera Phone: Tool Selection and Interaction using Visual Markers. C. Kray and M. Rohs. (2007) In „Workshop on Mobile Interaction with the Real World at Mobile HCI 2007“. Singapore, September 9, 2007.

Paul presented our paper at Pervasive 2008

Paul presented after lunch our full paper on a development approach and environment for mobile applications that supports underlying user models [1]. In the paper he shows how you can create applications while programming by example where the development environment automatically adds a KLM model. In this way the developer becomes automatically aware of estimated usage times for the application. The paper is work that builds on our paper on KLM for physical mobile interaction which was presented last year at CHI [2]. The underlying technology is the embedded interaction toolkit [3] – have a look – perhaps it makes you applications easier, too.

[1] Paul Holleis, Albrecht Schmidt: MAKEIT: Integrate User Interaction Times in the Design Process of Mobile Applications. In: Proceedings of the Sixth International Conference on Pervasive Computing, Pervasive’08. Sydney, Australia 2008, S. 56-74.

[2] Holleis, P.; Otto, F.; Hußmann, H.; Schmidt, A.: Keystroke-Level Model for Advanced Mobile Phone Interaction. In: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (San Jose, California, USA, April 28 – May 03, 2007). CHI ’07. ACM Press, New York, NY, 1505-1514.. 2007.

Paul presented a paper on mobile phone interaction at TEI’08

Paul Holleis presented at TEI’08 the results of the research he did during his internship at Nokia Research [1]. Over the summer Paul spent 3 month with Jonna Häkkila’s group in Helsinki, where he worked on two projects: combing touch and key-presses and wearable controls.

Technically both projects used capacitative sensing to recognize touch. In his paper “Studying Applications for Touch-Enabled Mobile Phone Keypads” [1] they added to common mobile phone buttons touch sensing so that multiple levels of interaction can be measured, such as approaching, touching and pressing. The paper additionally discusses new interaction possibility that arise from this.

[1] Paul Holleis, Jonna Häkkilä, Jussi Huhtala. Studying Applications for Touch-Enabled Mobile Phone Keypads. Proceedings of the 2nd Tangible and Embedded Interaction Conference TEI’08. February 2008.

On the Mobile Phone While Working?


It seems that recently I come across many people that speak on the phone while they do their work. In Toronto on the bus to the airport the driver spoke on the phone (telling someone how to find and edit a file in Windows) while driving. Here in Bonn I saw it in shops and on the ferry – it felt really awkward to interrupt people in their phone conversation just to pay my ticket or bread.

At the moment most people speak while holding a handset – but given they use BT-headsets one could image new working practice 😉 e.g. driving a bus and doing a call center job on the side. I would expect there will be some regulation soon…