In this paper, we present the main challenges “big data” raises to information systems, that is to systems dedicated to the storage and processing of data for decision making purposes. After presenting in detail two major applications of big data (information retrieval and business intelligence), we investigate the role of open data and the web in big bata applications, as well as the role the ...

Assuming that the underlying probability space is non-atomic we prove that products of random matrices (linear cocycles) with simple Lyapunov spectrum form an L p-dense set (1 p < 1) in the space of all cocy-cles satisfying the integrability conditions of the multiplicative ergodic theorem. However, the linear cocycles with one-point spectrum are also L p-dense. Further, in any L 1-neighborhood...

________________________________________________________________________________________________________ Study of the coarticulation CV within Italian adult stutterers The coarticulation of the stuttered speech shows distinctive characteristics in its dysfluent aspects as well as in its fluent ones. The present survey is about the coarticulation of fluent sequences tested in Italian adult stutt...

______________________________________________________ Regional Variations of Speech Rhythm in French: In Search of Lost Times This paper addresses the relevance of speech rhythm acoustic measures for the description of some standard, regional and contact varieties of French. First, the limitation of conventional speech rhythm measures (e.g. %V, ∆C or PVI) for the description of French regional...

Structured information retrieval (SIR) on XML documents allows to retrieve focused parts of documents that match the user needs. These needs can be expressed throught content and structured queries, that as well as XML documents can be represented as trees. Our approach uses these trees through tree edit distance to estimate the relevance of XML elements. Tree edit distance is the minimum set o...

The understanding of pedestrian mobility behaviors often relies on aggregated analyses. These analyses correlate spatial entities with the mobility streams that cross them. These types of approach are in particular developed to assess the impact of built morphology on pedestrian behavior. To go a bit further, we propose an unaggregated analysis, based on discrete choice models, and targeted on ...

The accumulation of records/archives within an association is linked to the growth of the activity in this association. What is to be done when, after sixteen years, the decision is finally taken to preserve the records/archives, as it happened at the “Restos du Cœur”? Besides the legal value stands the historical value, and also the information value for people involved in the activities of th...

________________________________________________________________________________________________________ Masked semantic priming in cocktail party situation The present study aimed at testing automatic semantic processing in the auditory modality using the cocktail party situation. Participants had to perform a lexical decision task on a target item embedded in a multi-talker babble. This babbl...

This paper introduces a modelling approach oriented to the representation of urban activities which takes into account several interacting spatio-temporal constraints. An activity is modeled as a constraint-based path with different transportation modalities and points of interest identified in a given urban system. The objective of this spatio-temporal model is to generate activity-oriented ro...

________________________________________________________________________________________________________ Comparison of journalistic and spontaneous speech: analysis of sequences between pauses. In this study we compare the ESTER corpus of journalistic speech (Galliano et al., 2005) and the NCCF corpus of spontaneous speech (Torreira et al, 2010) in terms of duration, f0 and spectral reduction i...