Overview of the 6th International Competition on Plagiarism Detection

[EN] This paper overviews 17 plagiarism detectors that have been evaluated within the sixth international competition on plagiarism detection at PAN 2014. We report on their performances for the two tasks source retrieval and text alignment of external plagiarism detection. For the third year in a row, we invite software submissions instead of run submissions for this task, which allows for cross-year evaluations. Moreover, we introduce new performance measures for text alignment to shed light on new aspects of detection performance.We thank the participating teams of this task for their devoted work. This paper was partially supported by the WIQ-EI IRSES project (Grant No. 269180) within the FP7 Marie Curie action.Potthast, M.; Hagen, M.; Beyer, A.; Busse, M.; Tippmann, M.; Rosso, P.; Stein, B. (2014). Overview of the 6th International Competition on Plagiarism Detection. CEUR Workshop Proceedings. 1180:845-876. http://hdl.handle.net/10251/61151S845876118

Understanding search

This thesis provides a framework for information retrieval based on a set of models which together illustrate how users of search engines come to express their needs in a particular way. With such insights, we may be able to improve systems’ capabilities of understanding users’ requests and through that eventually the ability to satisfy their needs. Developing the framework necessitates discussion of context, relevance, need development, and the cybernetics of search, all of which are controversial topics. Transaction log data from two enterprise search engines are analysed using a specially developed method which classifies queries according to what aspect of the need they refer to