News

The Bavarian Minister of Science visited poster presentations and demos in order to learn about the JIM project of the University of Würzburg.

Thomas van Dijk and Jan-Henrik Haunert received the Best Short Presentation award at the Web and Wireless GIS 2013 (W2GIS) conference for the presentation of their paper "A probabilistic model for road selection in mobile maps."

Jan-Henrik Haunert received the Otto von Gruber Award 2012 of the International Society for Photogrammetry and Remote Sensing (ISPRS).

Point set embeddings of graphs are drawings of graphs in which nodes lie only on positions allowed by a specified input point set. At chair I such embeddings have been investigated with the additional constraint that all crossing angles of two edges are large. Martin Fink presents the results at the conference WALCOM'12.

Die Deutsche Forschungsgemeinschaft (DFG) stell Forschungsgelder für das deutsche Teilprojekt von "Graph Drawings and Representations" des European Research Council (ERC), das im Juli in Prag gestartet ist, zur Verfügung.

Internet maps often have a small number of levels of detail, thus zooming may imply abrupt changes. This distracts users. In a new project, algorithms are developed that allow for a continuous transformation between different scales.

The chair of computer science I participates in the european research project GraDR, which aims at investigating several problems in relation to graph drawings and representations.

In centrality problems we search for a set of nodes of a graph that - as a group - is located as central as possible. At the conference WALCOM'11, Martin Fink presents algorithms and additional results for the centrality problem "Maximum Betweenness Centrality", which he investigated together with Spoerhase.

Location problems deal with the choice of locations for facilities that are to be opened. At the conference ISAAC'10, Joachim Spoerhase presents an optimal algorithm for the so-called single maximum coverage location problem on tree-graphs.

Joachim Spoerhase, research assistant at the Chair of Computer Science I, defends his dissertation on competitive and voting location.

As is well-known, the traveling salesman has the difficult task to visit a given set of cities on a shortest round-trip. At the conference STACS'10 in Nancy, Alexander Wolff gave a talk on new results for the case that the cities have so-called squared Euclidean distances.

The Victor Rizkallah foundation was initiated by Prof. Dr.-Ing. Victor Rizkallah, who taught and did research at the Universität Hannover from 1978 to 2000; he now is an honorary citizen of the university. The foundation supports young researchers.

Jan-Henrik Haunert, since 1/09/09 research associate at the chair of Computer Science I, presents a new method for vehicle positioning at the conference ACM SIGSPATIAL 2009.

The seminar is about geometric networks and related areas. A geometric network is a graph that is drawn in the plane such that its nodes correspond to points and its edges to straight-line segments between the points.

The magazine focuses its 4/2009 issue on the topic "structure" and discusses the problem of drawing subway maps. The author of the article, Stefanie Schramm, describes the contribution of Alexander Wolff and his former PhD student Martin Nöllenburg (KIT).