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Possibilistic networks and possibilistic logic bases are important tools to deal with uncertain pieces of information. Both of them offer a compact representation of possibility distributions. This paper studies a new representation format, called hybrid possibilis-tic networks, which cover both standard possibilis-tic networks and possibilistic knowledge(More)
AIMS AND OBJECTIVES Current methods for drug susceptibility testing (DST) of Mycobacterium tuberculosis (MTB) are either costly or slow. As the prevalence of multidrug-resistant (MDR) strains increases, the need for fast, reliable, and inexpensive methods is obvious. This study evaluated a rapid colorimetric nitrate reductase assay (NRA) for direct DST of(More)
Possibilistic networks are important tools for dealing with uncertain pieces of information. For multiply-connected networks, it is well known that the inference process is a hard problem. This paper studies a new representation of possibilistic networks, called hybrid pos-sibilistic networks. The uncertainty is no longer represented by local conditional(More)
This paper contains two important contributions for the development of possibilistic causal networks. The first one concerns the representation of interventions in pos-sibilistic networks. We provide the counterpart of the " DO " operator, recently introduced by Pearl, in possibility theory framework. We then show that interventions can equivalently be(More)
Ascribing causality amounts to determining what elements in a sequence of reported facts can be related in a causal way, on the basis of some knowledge about the course of the world. The paper offers a comparison of a large span of formal models (based on structural equations, non-monotonic consequence relations, trajectory preference relations,(More)
OBJECTIVE/BACKGROUND Tuberculosis is a major public health problem and the emergence of drug resistance complicates the situation even more. It is therefore crucial to implement all conclusions from the studies that aim at a better understanding of the molecular mechanisms which govern the emergence and the evolution of drug resistance. The aim of this(More)
AIM To evaluate patients' profiles, demographics, clinical and therapeutic approaches and strategies in patients with tuberculous lymphadenitis (TBG). PATIENTS AND METHODS A retrospective study of all TBG-confirmed cases admitted in a tuberculosis-specific health care facility between 1 January 2009 and 16 June 2013. RESULTS A total of 181 clinical(More)