Père et fils, tous deux investis dans l’économie sociale solidaire, Hugues Bastien Sibille confrontent leurs engagements au service du changement social. Le fossé générationnel n’interdit pas la rencontre des radicalités.

This paper considers the research goal of dependable steganalysis: where false positives occur once in a million or less, and this rate is known with high precision. Despite its importance for real-world application, there has been almost no study of steganalysis which produces very low false positives. We test existing and novel classifiers for their low false-positive performance, using milli...

In the field of information retrieval (IR), the goal is to identify documents from a large collection that are most relevant to a user’s query. If the subset of relevant documents is known, we can evaluate the quality of an information retrieval method using the metrics of precision, recall, accuracy, fallout and the F -measure (harmonic mean of precision and recall). To define these metrics we...