In this paper we present several fuzzy logics trying to capture different notions of necessity (in the sense of Possibility theory) for Godel logic formulas. Based on different characterizations of necessity measures on fuzzy sets, a group of logics with Kripke style semantics are built over a restricted language, namely a two level language composed of nonmodal and modal formulas, the latter m...

In this work we propose to use fuzzy prototypes for classification tasks. We create the prototypes by first clusterizing, separately, the available data for each class. Then we create a fuzzy set around each class center, according to clusterization indices that take into account both local and global data. We also investigate the use of an index to guide the process of obtaining a suitable num...

We develop a model for 2 agents to reach agreement over concept meaning in specific contexts. The model is based on an argumentationbased communication that engage the agents in a process of mutual adaptation using argumentation to reach an agreement over concept meaning. Our approach is to model concept meaning using the semiotic triangle and the notion of contrast sets. We implement and evalu...

Argumentative debates are a powerful tool for resolving conflicts and reaching agreements in open environments such as on-line communities. Here we introduce an argumentation framework to structure argumentative debates. Our framework represents the arguments issued by the participants involved in a debate, the (attack and defence) relationships between them, as well as participants? opinions o...

Argumentative debates are a powerful tool for resolving conflicts and reaching agreements in open environments such as on-line communities. Here we introduce an argumentation framework to structure argumentative debates. Our framework represents the arguments issued by the participants involved in a debate, the (attack and defence) relationships between them, as well as participants? opinions o...

BibTEX is the most commonly used bibliography processor in conjunction with LATEX. To put bibliography styles into action, it uses a stack-based language written with postfixed notation. Recently, other approaches have been proposed: some use a script programming language for designing bibliography styles, e.g., Perl in Bibulus; some are based on converters to XML texts and use XSLT for bibliog...

We develop a model for 2 agents to reach agreement over concept meaning in specific contexts. The model is based on an argumentationbased communication that engage the agents in a process of mutual adaptation using argumentation to reach an agreement over concept meaning. Our approach is to model concept meaning using the semiotic triangle and the notion of contrast sets. We implement and evalu...

This paper studies concentration aspects of bibliographies. More in particular we study the impact of incompleteness of such a bibliography on its concentration values (i.e. its degree of inequality of production of its sources). Incompleteness is modelled by sampling in the complete bibliography. The model is general enough to comprise truncation of a bibliography as well as a perfectly strati...