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Finding relationships between authors and thematic similar publications is getting harder and harder due to the mass of information and the rapid growth of the number of scientific workers. The io-port.net portal and the DBLP Computer Science Bibliography including more than 2,000,000 and 750,000 publications, respectively, from more than 450,000 authors(More)
Document image processing is a crucial process in the office automation and begins from the 'OCR' phase with difficulty of the document 'analysis' and 'understanding'. This paper presents a hybrid and comprehensive approach to document structure analysis. Hybrid in the sense, that it makes use of layout (geometrical) as well as textual features of a given(More)
Quality management is, not only for digital libraries, an important task in which many dimensions and different aspects have to be considered. The following paper gives a short overview on DBLP in which the data acquisition and maintenance process underlying DBLP is discussed from a quality point of view. The paper finishes with a new approach to identify(More)
Document Transformation techniques have been studied for decades. In this paper, a new approach for a significant improvement is presented based on using a new query expansion method. In contrast to other methods, the regarded query is expanded by adding those terms that are most similar to the concept of individual query terms, rather than selecting terms(More)
Information retrieval (IR) systems utilize user feedback for generating optimal queries with respect to a particular information need. However the methods that have been developed in IR for generating these queries do not memorize information gathered from previous search processes, and hence can not use such information in new search processes. Thus each(More)
The main purpose of business process modeling is the representation and analysis of alternative process designs by formal or semi-formal process models. Manual modeling of business processes is a time-consuming task. Typos and structural modeling errors make it particularly error prone to model business processes manually. Users can be assisted in modeling(More)
Query expansion methods have been studied for a long time – with debatable success in many instances. In this paper, a new approach is presented based on using term concepts learned by other queries. Two important issues with query expansion are addressed: the selection and the weighing of additional search terms. In contrast to other methods, the regarded(More)
Petri nets are widely accepted as a process modeling technique with formal semantics and mathematical foundation. They are well suitable for modeling (business) processes in executable form and for analyzing process models through simulative validation and formal verification. Nevertheless, there are currently only a small number of Petri net based tools(More)
Information Retrieval Systems have been studied in Computer Science for decades. The traditional ad-hoc task is to find all documents relevant for an ad-hoc given query but the accuracy of ad-hoc document retrieval systems has plateaued in recent years. At DFKI, we are working on so-called col-laborative information retrieval (CIR) systems whic h(More)