Christophe Dousson

Learn More
The situation recognit ion system, to which this paper is devoted, receives as input a stream of time-stamped events; it performs recognition of instances of occurring situations, as they are developing, and it generates as output deduced events and actions to trigger. It is mainly a temporal reasoning system. I t is p red ic t i ve in the sense that i t(More)
We address the problem of knowledge acquisit ion for alarm correlation in a complex dynamic system like a telecommunications network. To reduce the amount of informat ion coming from telecommunications equipment, one needs to preprocess the alarm stream and we propose here a way to acquire some knowledge to do that. The key idea is that only the frequent(More)
This article falls under the problem of the symbolic monitoring of real-time complex systems or of video interpretation systems. Among the various techniques used for the on-line monitoring, we are interested here in the temporal scenario recognition. In order to reduce the complexity of the recognition and, consequently, to improve its performance, we(More)
S. Cauvin, IFP, 1-4 Avenue du Bois Préau, F-92852 Rueil Malmaison cedex M-O. Cordier, IRISA, Campus de Beaulieu, F-35000 Rennes C. Dousson, France Telecom – CNET, 2 Avenue Pierre Marzin, F-22307 Lannion cedex P. Laborie, EDF/DER/ER, 1 Avenue du Général de Gaulle, F-92141 Clamart cedex F. Lévy, LIPN, Avenue J.B. Clément, F-93430 Villetaneuse J. Montmain, CEA(More)
This paper describes a formalism to model the behavior of telecommunications networks when a fault occurs and how the effects are propagated across equipment. The objective of such a formalism, which is derived from UML diagram sequences, is to ease the construction and the update of a model corresponding to the supervised network; this model can be used to(More)
The aim of this study was to compile a register of all the employees of a University Hospital Centre who complained of dermatosis of the hands due to latex. Recruitment was made by their spontaneous presentation in the service of the Workers Doctor (Médecine de Travail). The prevalence of clinical signs of contact eczema or professional urticaria is 2.3%(More)
In this paper we propose a method to pre-process a telecommunication alarm log with the aim of discovering more accurately frequent patterns. In a first step, the alarm types which present the same temporal behavior are clustered with a self organizing map. Then, the log areas which are rich in alarms of the clusters are searched. The sublogs are built(More)
This article falls under the problems of the diagnosis of distributed systems such as telecommunication networks. Among the various techniques used for the on-line diagnosis, we are interested in the chronicle recognition. A chronicle is a set of patterns of observable events temporally constrained. Within the framework of the diagnosis, the set of(More)
An optimally working mobile system requires tight cooperation and an information stream that flows impeccably between its components. This, however, is not the current state of the art, as applications and system components must each, in isolation, acquire data, create a knowledge base, and maintain it with diligence. We introduce chronicle recognition to(More)