Karl Gyllstrom
post-doctoral researcher in computer science at kuleuven currently studying web search and information retrieval
Intro
I am a post-doctoral researcher in the Computer Science department of Katholieke Universiteit Leuven. Currently I work on the PuppyIR project, trying to help make children's web search a little bit better. I've explored ideas such as providing fun media results for search queries, approaches to automatically find child-oriented pages on the web, and detecting controversial elements among topics and queries. My general research interests span information retrieval and human-computer interaction.
Thesis
I completed my PhD at the Computer Science department at the University of North Carolina at Chapel Hill. My thesis was about helping users re-find their own lost documents by using their previous activity with the documents as a memory trigger. Have you ever lost a document because you can't remember its name or any exact keywords it contained? If so, you probably remember other activity-based attributes, such as when you last used it (to prepare for a paper submission), how you used it (heavily before the deadline, rarely afterwords), and what documents you used alongside it. In my thesis, I explored ways to support the application of users' memories of these forms of activity in re-finding/retrieval tasks. Confluence traces user activity in the filesystem; SeeTrieve extends this with activity in the GUI; and Passages is a more sophisticated combination of these layers.
Papers
Poster Karl Gyllstrom, Carsten Eickhoff, Arjen P. de Vries, Marie-Francine Moens: The downside of markup: examining the harmful effects of CSS and javascript on indexing today's web. CIKM 2012: 1990-1994
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Demo Leif Azzopardi, Douglas Dowie, Sergio Duarte Torres, Carsten Eickhoff, Richard Glassey, Karl Gyllstrom, Djoerd Hiemstra, Franciska de Jong, Frea Kruisinga, Kelly Ann Marshall, Sien Moens, Tamara Polajnar, Frans van der Sluis, Arjen P. de Vries: EmSe: Supporting Children's Information Needs within a Hospital Environment. ECIR 2012: 578-580
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Poster Karl Gyllstrom, Marie-Francine Moens. Examining the Leftness Property of Wikipedia Categories. In CIKM, 2011.
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Workshop Tamara Polajnar, Richard Glassey, Karl Gyllstrom and Leif Azzopardi. Enabling Picture-based Querying and Learning with the JuSe Interface. In Proceedings of the 2nd Child Computer Interaction: Workshop on UI Technologies and Educational Pedagogy at CHI, 2011.

Diane Kelly, Karl Gyllstrom. An Examination of Two Delivery Modes for Interactive Search System Experiments: Remote vs. Face-to-Face. In CHI, 2011.
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Karl Gyllstrom, Marie-Francine Moens. Clash of the Typings: Finding controversies and children's topics within queries. In ECIR, 2011.
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Demo Carsten Eickhoff, Tamara Polajnar, Karl Gyllstrom, Sergio Duarte, Richard Glassey. Web Search Query Assistance Functionality for Young Audiences. In ECIR, 2011.
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☆ Karl Gyllstrom, Marie-Francine Moens. Wisdom of the ages: toward delivering the children's web with the link-based agerank algorithm. In CIKM, 2010.
Featured in Slate article.
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Workshop Karl Gyllstrom, Elin Rønby Pedersen. Not gone, but forgotten: Helping users re-find web pages by identifying those which are most likely to be lost. In SIGIR Desktop Search Workshop, 2010.
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Poster Karl Gyllstrom, Marie-Francine Moens. A Picture is Worth a Thousand Search Results: Finding Child-Oriented Multimedia Results with collAge. In SIGIR, 2010.
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☆ Diane Kelly, Amber Cushing, Maureen Dostert, Xi Niu, Karl Gyllstrom. Effects of popularity and quality on the usage of query suggestions during information search. In CHI, 2010.
Nominated for best paper award.
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Short paper Elin Rønby Pedersen, Karl Gyllstrom, Shengyin Gu, Peter Jin Hong. Automatic Generation of Research Trails in Web History. In IUI, 2010.
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Diane Kelly, Karl Gyllstrom, Earl Bailey. A Comparison of Query and Term Suggestion Features for Interactive Searching. In SIGIR, 2009.
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Poster Earl Bailey, Diane Kelly, Karl Gyllstrom. Undergraduates' Evaluations of Assigned Search Topics. In SIGIR, 2009.
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Karl Gyllstrom. Passages through time: chronicling users' information interaction history by recording when and what they read. In IUI, 2009.
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Doctoral Consortium Karl Gyllstrom. Tracing, indexing, and retrieving desktop activity with the Passages system. In UIST Doctoral Consortium, 2008.
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Karl Gyllstrom, Craig Soules, Alistair Veitch. Activity Put in Context: Identifying implicit task context within the user's document interaction. In IIiX, 2008. ACM Press.
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Karl Gyllstrom, Craig Soules. Seeing is retrieving: Building information context from what the user sees. In IUI, 2008. ACM Press.
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Poster Karl Gyllstrom, Craig A. N. Soules, Alistair Veitch. Confluence: enhancing contextual desktop search. In SIGIR, 2007.
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Karl Gyllstrom, Dorian Miller, and David Stotts. Techniques for improving the visibility and ``sharability" of semi-transparent video in shared workspaces. In ACM-SE 45, 2007. ACM Press.
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Dorian Miller, Karl Gyllstrom, David Stotts, and James Culp. Semi-transparent video interfaces to assist deaf persons in meetings. In ACM-SE 45, 2007. ACM Press.
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Kanyamas Navoraphan, Edward F. Gehringer, James Culp, Karl Gyllstrom, and David Stotts. Next-generation dpp with sangam and facetop. In eclipse '06, USA, 2006. ACM Press.
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David Stotts, Jason McC. Smith, and Karl Gyllstrom. Facespace: endo and exo-spatial hypermedia in the transparent video facetop. In Hypertext '04, 2004. ACM Press.
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☆ David Stotts, Jason McC. Smith, and Karl Gyllstrom. Support for distributed pair programming in the transparent video facetop. In XP/Agile Universe, 2004.
Best paper award.
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Patents
Methods for Merging Text Snippets for Context Classification. Karl Gyllstrom, Craig Soules. Filed May 6, 2010.

Methods for Pairing Text Snippets to File Activity. Karl Gyllstrom, Craig Soules. Filed May 6, 2010.

Using Interface Events to Group Files. Karl Gyllstrom, Alistair Veitch, Henri J. Suermondt, Pankaj Mehra. Filed October 30, 2008.

Work
Katholic University of Leuven
Post-doctoral researcher; January 2010 - present
Helping to design and implement an open source search engine for children. Research spans wide range from usability to content acquisition. Collaborating with several IR institutions including universities of Glasgow, Strathclyde, Twente, and Delft.

Google
Research intern; October 2008 - June 2009
Researched algorithms for automated detection of web research tasks among search users in order to determine when to provide more advanced organization features via the user interface.

(SILS) University of North Carolina at Chapel Hill
Researcher; March 2008 - 2009
Researched algorithms to automatically generate recommended search queries to users. Implemented web-based search system using recommended queries, and deployed large scale study involving more than 100 users.

HP Labs
Research intern; Summer/Fall 2007
Designed and implemented the SeeTrieve system, a personal document retrieval tool which uses activity as a search attribute; traces users' document interaction via both the file system and user interface. Designed and implemented user study involving 16 participants.

HP Labs
Research intern; Summer/Fall 2006
Designed and implemented the Confluence system, an extension to an existing search tool that identifies document similarity through task commonality; traces users' document interaction via both the file system and user interface. Designed and implemented long term user study (3-6 months) involving 6 participants.

(CS) University of North Carolina at Chapel Hill
Research assistant; 2003 - 2006
Lead engineer on the FaceTop system, a system supporting remote collaboration via a video-conferencing system combined with a shared desktop workspace. Project featured in Wired, Slashdot, and a number of conference publications.

IBM, Extreme Blue
Software engineer intern; June - August 2003
Developer on BPEL-Lite project, enabling suspension and resumption of Java processes in WebSphere. Presented work to IBM CEO Sam Palmisano.

Mentisys
Software engineer intern; June - August 2001
Developed testing software for large, distributed, enterprise Java application.