A User Modeling Server for Contemporary Adaptive Hypermedia: An Evaluation of the Push Approach to Evidence Propagation

  • Michael Yudelson
  • Peter Brusilovsky
  • Vladimir Zadorozhny
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4511)


Despite the growing popularity of user modeling servers, little attention has been paid to optimizing and evaluating the performance of these servers. We argue that implementation issues and their influence on server performance should become the central focus of the user modeling community, since there is a sharply increasing real-life load on user modeling servers, This paper focuses on a specific implementation-level aspect of user modeling servers – the choice of push or pull approaches to evidence propagation. We present a new push-based implementation of our user modeling server CUMULATE and compare its performance with the performance of the original pull-based CUMULATE server.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Michael Yudelson
    • 1
  • Peter Brusilovsky
    • 1
  • Vladimir Zadorozhny
    • 1
  1. 1.School of Information Science, University of Pittsburgh, 135 N. Bellefield Ave. Pittsburgh, PA 15232USA

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