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The evaluation of an implication by Imaging is a logical technique developed in the framework of modal logic. Its interpretation in the context of a possible worlds" semantics is very appealing for IR. In 1989, Van Rijsbergen suggested its use for solving one of the fundamental problems of logical models in IR: the evaluation of the implication d ! q where(More)
In this paper we present some new methods of ranking information retrieval systems without relevance judgement. The common ground of these methods is using a measure we called reference count. An extensive experimentation was conducted to evaluate the effectiveness of the proposed methods using various different standards Information Retrieval evaluation(More)
The rst part of the paper brieey introduces what automatic au-thoring of a hypertext for information retrieval means. The most diicult part of the automatic construction of a hypertext is the creation of links connecting documents or document fragments that are semantically related. Because of this, to many researchers it seemed natural to use IR techniques(More)
This contribution presents the evaluation methodology for the identification of potential " sexual predators " in online conversations as part of PAN 2012. We provide details of the realized collection and analyse the submissions of the participants, who had to solve two problems: identify the predators among all the users in the different conversations and(More)
i I certify that except where due acknowledgement has been given, the work presented in this thesis is that of the author alone; the work has not been submitted previously, in whole or in part, to qualify for any other academic award; and the content of the thesis is the result of work which has been carried out since the official commencement date of the(More)
The paper addresses the problem of the automatic construction of a hypertext to be used for Information Retrieval (IR) purposes. The starting point is modelling a set of raw IR data by means of a conceptual schema. The conceptual schema produced for a specific IR application domain provides the user with a frame of reference in the query formulation(More)