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constructing new Information Visualization techniques, that may
help users to uncover complex relationships or make sense of large amounts
of data. At PLAY, we are especially interested in solving the problems
that occur when the size of the screen is very limited in relation to the
amount of information that needs to be displayed - a common occurrence with
handheld devices such as mobile phones and PDAs. We have also developed
several novel visualization techniques for the World Wide Web.
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We are currently experimenting with how to develop effective and user-friendly visualizations of texts based on a Rapid Serial Visual Presentation technique (RSVP). This project is a collaboration with Ericsson Research.
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Building on the PowerView application (below), we are looking at how interfaces for PDAs can be enhanced to incorporated telephony and proximity-based information. This project is a continuation of our collaboration with Ericsson Radio Systems.
M.A. theses:
1. Kronlid, F. & Nilsson, V. TreePredict. M.A. thesis in Computational Linguistics at Göteborg University, 2000. Supervised by Björk, S. and Wengelin, Å. [PDF][PS]
Publications:
1. Kronlid, F., & Nilsson, V. TreePredict: Improving text entry on PDAs. Student poster to be presented at CHI 2001, March 31 - April 5, Seattle, Washington, USA. [Abstract]
2. Björk, S. Activity-Based Mobile Interfaces - Towards a user model for Hybrids between Mobile Phones and PDAs. Workshop Paper to be presented at CHI 2001, March 31 - April 5, Seattle, Washington, USA. [Abstract]
3. Nyberg, M., Björk, S., Goldstein, M., & Redström, J. Handheld Applications Design: Merging Information Appliances Without Affecting Usability. To be presented at Interact 2001, July 9-13, Tokyo, Japan. [Abstract]
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In collaboration with Ericsson Radio Systems, we
are developing a new application that uses our focus+context technique
flip zooming to present data on devices with small screens. In order to easy the interaction for mobile users, several types of information are shown simultanously.
Publications:
1. Holmquist, L.E.
Will Baby Faces Ever Grow Up?
Proc. Human-Computer Interaction International (HCII) '99,
Lawrence-Earlbaum Associates, 1999.
2. Jacobsson, M. Comparing the PowerView interface with the traditional Windows CE interface: Novice users favour two-handed navigation over one-handed on PDAs. Master Thesis in Psychology, Department of Psychology, Lund University, 1999. [PDF]
3. Björk, S., Holmquist, L.E., Ljungstrand, P., and Redström, J. PowerView: Structured Access to Integrated Information on Small Screens. Short paper at Computer-Human Interaction 2000, April 1-6, The Hague, The Netherlands. [PDF]
4. Ljungstrand, P. Regarding System Output in Situated Computing. Workshop paper at the Research Directions in Situated Computing workshop, Computer-Human Interaction (CHI) 2000, The Hague, The Netherlands, 2000. [PDF]
5. Björk, S., Redström, J., Ljungstrand, P., and Holmquist, L.E. POWERVIEW: Using information links and information views to navigate and visualize information on small displays. Paper at Handheld and Ubiquitous Computing 2000 (HUC2k).
[PDF]
[Abstract]
6. Jacobsson, M., Goldstein, M., Anneroth, M. Werdenhoff, J. & Chincholle, D. (Ericsson Research) An Action Control but no Action: Users Dismiss Single-Handed Navigation on PDAs. In Proceedings of NordiCHI 2000, Stockholm, Sweden.
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To better understand focus+context visualization techniques,
we are developing a theoretical framework that can be used both as a descriptive and a constructive tool. The framework might also be generalized to other types of information visualization.
Publications:
1. Björk, S., Holmquist, L.E. and Redström, J. A Framework for Focus+Context Visualization. Proc. IEEE Information Visualization '99, IEEE Press, 1999. [PDF]
2. Björk, S., and Redström, J. Redefining the Focus and Context of Focus+Context Visualizations . Presented at Information Visualization (InfoVis) 2000. [PDF] (full version) [PDF] (short version) [Abstract]
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WebAware is an application that gives continuos
visual information about the activities on a web site, such as the number
of visitors per day or what areas of the server are most popular. By projecting
the WebAware images in a public space, such as the wall in a corridor,
we can give an "ambient" display of web site activity.
M.A. theses:
1. Siverbo, M. and Skog, T.
WebAware - A Dynamic Visualization of
Web Site Activity. Computational linguistics; supervised by L.E. Holmquist.
Publications:
1. Skog, T. and Holmquist, L.E.
WebAware: Continuous Visualization of Web Site Activity in a Public Place
Student poster presentation,
Computer-Human Interaction 2000,
April 1-6, The Hague, The Netherlands.
See also
Amplified Reality.
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The flip zooming toolbox is a set of Java classes
that makes construction of new flip zoom-based applications quick and easy.
WEST, The Hierarchical Image Browser and Digital Variants are examples
of applications based on the toolbox.
Publications:
Björk, S. Hierarchical Flip Zooming: Enabling Parallel Explorations of Hierarchical Visualizations. Presented at Advanced Visual Interfaces (AVI) 2000, May 24-26, Palermo, Italy.
[PDF] [Abstract]
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In collaboration with Telia Research and the Swedish
Institute of Computer Science, we have developed a web browser for use
on devices with very small screens, such as PDAs. The browser uses flip
zooming in conjunction with other novel techniques to present users with
an overview of a web page.
Publications:
1. Björk, S. and Redström, J.
An Alternative to Scrollbars on Small Screens.
Extended Abstracts of ACM Computer-Human
Interaction (CHI) '99,
ACM Press, 1999. [PDF]
2. Björk, S., Holmquist, L.E., Redström, J., Bretan, I., Danielsson,
R., Karlgren, J. and Franzèn, K. WEST: A Web Browser for Small Terminals. Proc.
ACM Conference on User Interface Software and Technology (UIST) '99, ACM Press, 1999. [PDF]
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WebWho
is a tool for visualization of where people are currently located in a
computer lab environment. It provides awareness of who is present and who
is not, thus supporting emergent collaboration and coordination between
distributed users.
Publications:
1. Ljungstrand, P. WebWho: Support for Student Awareness and
Coordination.In Proceedings of European Conference on Computer
Supported Cooperative Work (ECSCW) '99, 1999.
2. Ljungstrand, P. & Hård af Segerstad, Y. An analysis of WebWho: How does awareness of presence affect written messages?. Workshop paper at the Awareness and the World Wide Web workshop at Computer-Supported Cooperative Work (CSCW) 2000, Philadelphia, PA, USA, December 2-6, 2000. [PDF] [Abstract]
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What is the geography of cyberspace? In this project,
we developed a method to generate visual "maps" of web sites. The maps
could show a variety of information at a glance, including the age, size
and complexity of a site.
Publications:
1. Holmquist, L.E., Fagrell, H. and Busso, R. Navigating Cyberspace
with CyberGeo Maps. In Proceedings of IRIS 21, Sæby, Denmark,
1998. [PDF] |
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In cooperation with the Department of Italian at
the University of Edinburgh, we developed a new visualization tool for
literature studies. By presenting several versions of the same text simultaneously
using flip zooming, we could help scholars track changes between version
of a text and thus better understand the writing process.
Publications:
Björk, S. and Holmquist, L.E.: The Digital Variants Browser:
An explorative tool for literature studies. To be published in Proceedings
of Computers, Literature and Philology, Edinburgh, UK, 1998. [RTF]
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Presenting image collections on the web is problematic,
especially if we want to approximate the experience of visiting an art
museum or looking through a book of reproductions. Here, we used a set
of images from the web site of the Louvre Museum, and arranged them hierarchically
in a flip zoom-based visualization, approximating the ordering and spatial
relationships that a visitor would get when seeing the same images in the
"real" museum.
Publications:
1. Holmquist, L.E. and Björk, S. A Hierarchical Focus+Context
Method for Image Browsing. In Proceedings of SIGGRAPH '98: Sketches
and Applications, ACM Press, 1998. [HTML]
Demo:
Hierarchical Image Browser Demo
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StarZoom presented a visual interface to a complex
database, in this case 700 articles from the WIRED news service. By classifying
the articles in a hypernym tree using WordNet and visualizing the tree
in the StarZoom applet, we enabled users to search the database using abstract
concepts rather than strict string matches.
Publications:
Bruno, P., Ehrenberg, V. and Holmquist, L.E.:
STARzoom - An Interactive
Visual Database Interface.
Proc. ACM Intelligent User Interfaces (IUI) '99,
ACM Press, 1999.
[PDF] |
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To evaluate and find ways to improve flip zooming,
a formative evaluation was performed where an application for image browsing
which used the technique was constrasted against two traditional applications.
Publications:
1. Björk, S. and Holmquist, L.E.:
Formative Evaluation of a Focus
+ Context Visualisation Technique.
Poster at HCI'98. [HTML]
[PS]
[RTF]
[PDF] |
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The Zoom Browser was the first application to utilize
flip
zooming, a focus+context visualization technique developed by members
of PLAY. The browser used flip zooming to present simultaneous detail and
overview of one or more web pages.
Publications:
1. Holmquist, L.E.:
Focus+Context Visualization with Flip Zooming and
the Zoom Browser.
Extended Abstract of
ACM Computer-Human Interaction (CHI) '97,
ACM Press, 1997.
[PDF]
2. Holmquist, L.E. and Ahlberg, C.:
Flip Zooming: A Practical Focus+Context Approach to Visualizing
Large Information Sets.
Proc. Human-Computer Interaction International '97,
Elsevier, 1997.
[PDF]
3. Holmquist, L.E.:
The Zoom Browser: Showing Simultaneous Detail and
Overview in Large Documents.
In
Human IT vol. 2 no. 3, ITH, 1998.
[
HTML]
Demo:
Zoom Browser Java applet
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