PhD Thesis written by Noa P. Cruz Díaz at the University of Huelva under the supervision of Dr. Manuel J. Maña López. The author was examined on 10th July 2014 by a committee formed by the doctors Manuel de Buenaga (European University of Madrid), Mariana Lara Neves (University of Berlin) and Jacinto Mata (University of Huelva). The PhD Thesis was awarded Summa cum laude (International Doctorate).

Negation status identification for findings or diagnoses is an important medical data mining problem. Negative qualifier assigned to a medical condition may indicate the absence of the condition, so the ability to reliably identify the negation status of medical concepts affects the quality of results produced by the indexing and search tools. Searching for the best negation algorithm to use in...

The article presents the experiments carried out as part of the participation in the pilot task (Modality and Negation)1 of QA4MRE@CLEF 2012. Modality and Negation are two main grammatical devices that allow to express extra-propositional aspects of meaning. Modality is a grammatical category that allows to express aspects related to the attitude of the speaker towards statements. Negation is a...

Linguistic research has clearly shown that natural languages exhibit different forms of negation. Foremost among these are sentence negation and predicate negation. In this study, the relationship between both will be discussed. In particular, it wiu be argued that we can give an accurate description of the logical connections between sentence negation and predicate negation by reference to the...

The aim of this paper is to propose f-structure representations of two different types of negation: constituent negation and eventuality negation. In particular, the paper substantiates a suggestion recently made within the PARGRAM community that two binary-valued attributes are needed. We also show that, while the distinction between constituent and eventuality negation is often treated as epi...

This paper tackles automatic detection of contradictions in Spanish within the news domain. Two pieces information are classified as compatible, contradictory, or unrelated information. To deal with task, ES-Contradiction dataset was created. contains a balanced number each three types The novelty research is fine-grained annotation different dataset. Presently, four covered contradiction examp...

Access to reliable data from electronic health records is of high importance in several key areas in patient care, biomedical research, and education. However, many of the clinical entities are negated in the patient record text. Detecting what is a negation and what is not is therefore a key to high quality text mining. In this study we used the NegEx system adapted for Swedish to investigate ...

In [10], several constructive description logics were proposed as intuitionistic variants of description logics, in which classical negation was replaced by strong negation as a component to treat negative atomic information. For conceptual representation, not only strong negation but also combining it with classical negation seems to be useful and necessary due to their respective features cor...