Pervasive information systems give an overview of what digital environments should look like in the future. From a data-centric point of view, traditional databases have to be used alongside with non-conventional data sources like data streams, services and events. In this paper, we tackle the definition of continuous queries combining standard relations, data streams and services in a declarat...

The integrated Brownian motion is sometimes known as the Langevin process. Lachal studied several excursion laws induced by the latter. Here we follow a different point of view developed by Pitman for general stationary processes. We first construct a stationary Langevin process and then determine explicitly its stationary excursion measure. This is then used to provide new descriptions of Itô’...

Dans cet article. on suggere que les problemes de sCcuritC a fondement politique devraient aussi &tre analyses d’un point de vue psychologique. Puisque les individus evaluent le niveau de sCcuritC a travers des processus cognitifs, les rksultats sont subjectifs. Les representations concernant la securitC sont construites a partir d’une menace perque dans l’environnement, menace que l’individu c...

— We discuss the integrability of Jacobi manifolds by contact groupoids, and then look at what the Jacobi point of view brings new into Poisson geometry. In particular, using contact groupoids, we prove a Kostant-type theorem on the prequantization of symplectic groupoids, which answers a question posed by Weinstein and Xu. The methods used are those of Crainic-Fernandes on A-paths and monodrom...