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E. Lubben

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Publications by E. Lubben (bibliography)

1991

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Hofmann, Martin, Langendorfer, Horst, Laue, K. and Lubben, E. (1991): The Principle of Locality Used for Hypertext Presentation: Navigation and Browsing in CONCORDE. In: Diaper, Dan and Hammond, Nick (eds.) Proceedings of the Sixth Conference of the British Computer Society Human Computer Interaction Specialist Group - People and Computers VI August 20-23, 1991, Heriot-Watt University, Edinburgh, UK. pp. 435-452.

“This paper presents a comparison of various graph-layout algorithms used for an hypertext overview. The solution finally implemented in a prototype system called CONCORDE is discussed.”

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Hofmann, M., Langendorfer, H., Laue, K. and Lubben, E. (1991): Attempts to Draw Nice Graphs by an Interactive Hypertext Browser. In: Proceedings of the Fourth International Conference on Human-Computer Interaction 1991. pp. 327-331.

“This paper deals with the interactive user interface of the CONCORDE hypertext system. A first prototype of CONCORDE was shown at the German workshop on hypertext in April 1990. Main objective of the realization of the system is the support of active hypertext applications. In opposite to browsing applications, active hypertext applications change the data inside the system. In the next sections of this paper, a brief survey of CONCORDE and its user interface is given (section 2). We had to implement some graph-layout algorithm since CONCORDE uses a machine-driven graph-layout. The selection of a fitting algorithm surprisingly proved to be difficult, since often the computation of "nice graphs" consumes more time than bearable in an interactive system. We compare some algorithms we tried to apply in our system (section 3). Finally, we describe the solution implemented (section 4).”

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