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HCIL Seminar Series

The HCIL Seminar Series offers a common ground that can promote interdisciplinary discussion on a wide range of topics relating to Human-Computer Interaction.

Our Fall 2007 speakers will be announced soon! Save Friday November 30th from 1-4pm for our Seminars.

Fall 2007 Speakers

November 30, 2007

Friday, 1pm, Room 2105, Hornbake Bldg, South Wing

Loren Terveen
University of Minnesota

Communities that Create Content: Analysis and Design


The internet has enabled a new class of applications where users -- rather than designers or owners or managers - produce much of the value of the application. Social filtering systems -- as pioneered by sites like MovieLens and popularized in sites like -- took one step on this path. While site owners are responsible for entering the items of interest (movies, books, etc.), users add value by entering ratings, tags, reviews, etc. Other systems like wikis and open source software take user creation of content to a radical extreme: users produce all content. This idea might seem unlikely to work, but the sucess of systems like Wikipedia and Linux is proof to the contrary. I will report on several research projects that explore key issues in communities where users create content:

  • Who creates the value in these communities?
  • How vulnerable are these communities to "damage"? How effective are they at fixing damage?
  • How can these communities get their members to work more effectively, e.g, to do more tasks and do them better
  • How can the wiki concept be merged with Geographical Information Systems concepts to support geographically-based knowledge sharing?
We investigated these issues in Wikipedia, Movielens, and a new "geowiki" for cyclists. I also will reflect on when user content creation is a good approach and introduce several new research themes, including community -sensitive assignment of tasks to users.



Dr. Loren Terveen is Associate Professor of Computer Science and Engineering at Minnesota. His research interest spans a variety of topics in human-computer interaction and social computing, including creating more effective online participation and bringing local and online communities together. He helped develop one of the early recommender web sites (PHOAKS) and now is a co-leader of the CommunityLab project. Dr. Terveen received his Ph.D. 1991 from the University of Texas at Austin. He has served the human-coputer interaction community in various leadership roles, including co-chair of the CHI and IUI conferences and program chair of CSCW. 

November 30, 2007

Friday, 2:30pm, Room 2105, Hornbake Bldg, South Wing

Karrie Karahalios
University of Illinois at Urbana-Champaign

Visualizing Voice


Audio communication research to date has been primarily dominated by work in the areas of speech recognition, transmission and compression, synthesis, computer music theory, and some music information retrieval. Looking at many research laboratories and universities, we tend to find audio processing groups focusing exclusively on the above areas. In the area of Human Computer Interaction (HCI), research in audio is in the minority. For example, there are several textual search engines and even image search engines, yet barely a voice browser for public use. One reason is that a voice or audio browser relies heavily on speech recognition and audio classification which are not very accurate in general use scenarios. Given different speakers and different speaking environments, the problem becomes increasingly more difficult. In this talk, we are taking a step back and looking at voice from a simpler perspective. We will show examples of conversational dynamics, retreaval through the use of a real time voice visualization on a tabletop, and examples of new interactions by using this interface as a social mirror. 


Karrie Karahalios is an assistant professor in computer science at the University of Illinois where she heads the Social Spaces Group. Her work focuses on the interaction between people and the social cues they perceive in networked electronic spaces. Of particular interest are interfaces for public online and physical gathering spaces such as chatrooms, cafes, parks, etc. The goal is to create interfaces that enable users to perceive conversational patterns that are present, but not obvious, in traditional communication interfaces. Karrie completed a S.B. in electrical engineering, an M.Eng. in electrical engineering and computer science, and an S.M. and Ph.D in media arts and science at MIT.  

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