Wir stellen eine zweischichtige Visualisierung vor, die StudentInnen helfen soll, Dokumente zu identifizieren, die fur ihr Studium relevant sind. Wahrend die erste Visualisierung eine Ubersicht bietet, zeigt die zweite eine adaptierte Perspektive: Wir visualisieren die Beziehung des Benutzermodells zu den Dokumenten, die fur die Aufgabe der BenutzerIn relevant sind; jede Benutzermodellkomponente ist durch einen Referenzpunkt reprasentiert.

We will visualize a user model to achieve adaptive information retrieval in a learning environment. User profile components such as user interests and user knowledge are visualized in WebVIBE with the purpose of helping the student in identifying relevant documents for study. We will be able to find out whether this visualization will change the students' access patterns to the study material and whether they will be able to find relevant documents faster.

This paper describes the use of specialized software to assist editors in the conduct of an IEEE mock ballot. Specifically, the CASCADE (Computer Augmented Support of Collaborative Authoring and Document Editing( system was configured to support a mock ballot for IEEE 1003.21(POSIX:Real Time Distributed System Communication). CASCADE is an experimental system for the development and exploration of agents to support the authoring and editing processes. The mock ballot of IEEE 1003.21 presented an opportunity to examine the applicability of real time collaborative systems as an assist to the document editing process. This study describes the development and testing of functions to assist editors in the management and disposition of comments that are normally made during the refinement and balloting of a standard. The results of the field test were disappointing due in large part to delayed software delivery. Cultural expectations and technological limitations also had negative impacts.While CASCADE was ultimately successful in parsing and placing comments in the revisable form of the document, early software failures undermined the editors' faith in the system. The current state of firewalls for most participants were such that it was virtually impossible to mount a real-time, shared system for the participants. We are confident that the evolution of CASCADE into an RPC-compliant client server system and the development of secure shells bridging trusted systems will eliminate many of the barriers to use.

The development of information technology standards is slow and expensive. Spring et al. (1994) suggested electronic document development tools for improving the process. CASCADE, a system developed at the University of Pittsburgh, supports collaborative authoring. CASCADE was tested in a review of comments made on a mock ballot of POSIX 1003.21 to determine the reliability and accuracy of a parser for mail delivered comments and to gather preliminary usability data. Asynchronous electronic commenting and comment review can improve both the quality and speed of standards development