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Workshop on Multi-User and Ubiquitous User Interfaces (MU3I)

January 13, 2004 at IUI/CADUI 2004








Final program with papers and presentations as PDF files online!


The vision of Ubiquitous Computing bears the promise of permanent access to information and computing resources through user interfaces (UIs) accessible to every human in many different situations and contexts. Current research in intelligent and instrumented environments shows that these UIs present quite a number of challenges, such as
  • new 'devices' such as tags or everywhere displays
  • new UI paradigms, such as tangible, physical and hybrid UIs
  • new UI metaphors for bridging the physical and virtual world
  • larger and 3-dimensional space of interaction
  • spatial and temporal mappings between real and virtual world
  • dynamic set of devices (i.e. people moving in and out)
  • dynamic adaptation among several dimensions: devices, users, services
  • restrictions of technical resources in the environment
  • restrictions of cognitive resources of users
  • presentation planning for single users vs. groups

Another direct consequence of ubiquitous user interfaces is the fact that they are used by more than one user at a time, more specifically, this implies
  • sharing of resources and control
  • synchronous and asynchronous collocated collaboration
  • conflict resolution such as control over parts of the environment
  • supporting and monitoring social protocols for group interaction
  • the need for UI metaphors for multiple simultaneous users
  • public vs. private services and devices
  • large UIs and specialized settings e.g. industrial control centers


The workshop will be held as as full day event, and will provide both time for presenting ongoing research and for the formation of break-out groups discussing relevant issues concerning one of the topics covered by the workshop.

We invite papers of about five pages length that report on original research covering one or more of the above named challenges.  Papers should be formatted according to CHI format (see style guide for details, latex style files can be found here). Submission should be uploaded to the Conference Review System no later than October 15, 2003. (Should that be impossible, we will also accept papers that are sent by email to Andreas Butz or Chris Kray.)  Submission should include the name and address of the primary contact and the paper as a PDF file. Notification of acceptance will be mailed to the contact author by November 10, 2003. 

We will also consider single page position papers describing a topic for discussion in break-out groups.

All workshop participants will be required to register for IUI/CADUI'04.  In order to benefit from the early registration discount, workshop participant will have a special extension on the early registration deadline.

Program committee and organization

Andreas Butz, Saarland University, Germany, (primary contact)
Christian Kray, Lancaster University, UK, (primary contact)
Antonio Krüger, Saarland University, Germany,
Albrecht Schmidt, University of Munich, Germany,

Anind K. Dey, Intel Research, Berkeley, U.S.A
Fredrik Espinoza, Swedish Institute of Computer Science, Sweden
Hans-Werner Gellersen, Lancaster University, U.K.
Tobias Höllerer, University of California at St. Barbara, U.S.A.
Dieter Schmalstieg, Vienna University of Technology, Austria
Lars Erik Holmquist, Viktoria Institute in Göteborg, Sweden
Thorsten Prante, Fraunhofer IPSI, Darmstadt, Germany
Aaron Quigley, University of Sydney, Australia
Peter Tandler, Fraunhofer IPSI, Darmstadt, Germany
Mark Billinghurst, Human Interface Technology Laboratory New Zealand, New Zealand
Hideyuki Nakashima, CyberAssist Research Center, Japan

Important dates

October 15, 2003
Deadline for paper submissions
October 24, 2003
Deadline for late submissions
November 28, 2003
Notification of acceptance
December 7, 2003
Camera-ready version of accepted papers due
December 8, 2003
Accepted papers available online on this site
January 13, 2004
January 14-16, 2004
IUI/CADUI main conferences


Andreas Butz
Christian Kray

Related workshop

There is a related workshop about 'Exploring the Design and Engineering of Mixed-reality Systems', which covers a distinct but related topic to the one covered by MU3I. More information on this complementary event is available here.