Approche graphique pour la modélisation statistique de la dépendance entre activités journalières

http://mistis.inrialpes.fr/workshop-statistique-transport.html Transparents disponibles sur http://mistis.inrialpes.fr/docs/workshop-statistique-transport/slidesDurand.pdfInternational audienceIn this presentation, we introduce a new family of statistical models for the analysis of multivariate count data. We propose an application in modelling daily activity programs at the scale of individuals or families

The European community’s response to the central European challenge the Genesis of a European common foreign policy

This MA thesis deals with the European Community's response to the Central European challenge. The lack of explanatory and normative theories to explain the European integration process as a whole demonstrates that it has been driven by Member States' interests and could be heavily influenced by external aspects. Despite the different political models of organisation (i.e. federation, confederation or international organisation) at the disposition of several states to organise themselves to tackle international problems, West European member states did not completely subscribe to any of these and that makes the European Union the political invention of this century. The politico-administrative model of the European Union is the result of a original and unprecedented bargaining to preserve national interests and supranational efficiency both at the same time. This process is both the source of its originality and the reason of its relative inefficiency when compared to the United States of Germany. However the European Union survives and proves the relevance in the international scene when confronted to external effects. Our argument is that Central Europe could be considered as one of the external factors that might push the European Union to strengthen its decision making process and to render its action more efficient and responsive to Central European needs. This thesis deliberately limits itself to the economic and political sides of European external policy and shows the evolution of the methods, structures and concepts that the European Union used to build up a Common Commercial Policy and to set up the Common Foreign and Security Policy

Estimation of Discrete Partially Directed Acyclic Graphical Models in Multitype Branching Processes

International audienceWe address the inference of discrete-state models for tree-structured data. Our aim is to introduce parametric multitype branching processes that can be efficiently estimated on the basis of data of limited size. Each generation distribution within this macroscopic model is modeled by a partially directed acyclic graphical model. The estimation of each graphical model relies on a greedy algorithm for graph selection. We present an algorithm for discrete graphical model which is applied on multivariate count data. The proposed modeling approach is illustrated on plant architecture datasets

Integration of Heterogeneous Cultural Heritage Data in a Web-based <br />Information System: A Case Study from Vianden Castle, Luxembourg

ISBN 978-963-8046-90-1International audienceThe project presented here proposes the first implementation of a Web-based Information System for the conservation, handling, and use of site data. The case study is the castle of Vianden in Luxembourg, on which considerable archaeological data have accumulated over the years. There is a recognized need in archaeology for a tool that will allow for fast, effective, and flexible exploratory analysis of data, especially at spatial and temporal levels. We have developed such an Information System with maximal portability by using Extensible Markup Language (XML) and Extensible Stylesheet Language (XSL) for data exchange. Our system consists of several interfaces permitting different types of access to heterogeneous information. We propose a description of the data in textual interfaces along with images, and dynamic links to this data through interactive 2D and 3D representations. The 2D images, photos, or vectors are generated in Scalable Vector Graphics (SVG), while 3D models are generated in X3

Détection de motifs disruptifs au sein de plantes : une approche de quotientement/classification d'arborescences

National audienceMultiple change-point models for path-indexed data are transposed to tree-indexed data. The objective of multiple change-point models is to partition a heterogeneous tree into homogeneous subtrees. Since optimal algorithms for segmenting sequences cannot be transposed to trees, we propose here an efficient heuristic for tree segmentation. Segmented subtrees are grouped together in a post-processing phase since similar disjoint patches are often observed in tree canopy. Application of such models is illustrated on mango tree where subtrees are assimilated to plant patches and clusters of patches to patch types (e.g. vegetative, flowering or resting patch).Les modèles de détection de ruptures multiples pour séquences sont transposés aux arborescences. L'objectif est de quotienter une arborescence en sous-arborescences homogènes. Comme les algorithmes optimaux de segmentation de séquences ne peuvent être transposés aux arborescences, nous proposons ici une méthode heuristique permettant de segmenter efficacement une arborescence. Les sous-arborescences obtenues sont ensuite groupées dans une phase de post-traitement car des sous-arborescences disjointes relativement similaires sont observées dans les canopées d'arbre. Ces modèles sont illustrés par le cas du manguier où les collections de sous-arborescences permettent d'identifier les motifs disruptifs (juxtaposition de sous-arborescences végétatives, florifères ou en pause) observés dans les canopées

A web information system for the management and the dissemination of Cultural Heritage data.

Safeguarding and exploiting Cultural Heritage induce the production of numerous and heterogeneous data. The management of these data is an essential task for the use and the diffusion of the information gathered on the field. Previously, the data handling was a hand-made task done thanks to efficient and experienced methods. Until the growth of computer science, other methods have been carried out for the digital preservation and treatment of Cultural Heritage information. The development of computerized data management systems to store and make use of archaeological datasets is then a significant task nowadays. Especially for sites that have been excavated and worked without computerized means, it is now necessary to put all the data produced onto computer. This allows preservation of the information digitally (in addition with the paper documents) and offers new exploitation possibilities, like the immediate connection of different kinds of data for analyses, or the digital documentation of the site for its improvement. Geographical Information Systems have proved their potentialities in this scope, but they are not always adapted to the management of features at the scale of a particular archaeological site. Therefore this paper aims to present the development of a Virtual Research Environment dedicated to the exploitation of intra-site Cultural Heritage data. The Information System produced is based on open-source software modules dedicated to the Internet, so users can avoid being software driven and can register and consult data from different computers. The system gives the opportunity to do exploratory analyses of the data, especially at spatial and temporal levels. The system is compliant to every kind of Cultural Heritage site and allows management of diverse types of data. Some experimentation has been done on sites managed by the Service of the National Sites and Monuments of Luxembourg