University of Marne-la-Vallée

About: University of Marne-la-Vallée is a based out in . It is known for research contribution in the topics: Estimator & Context (language use). The organization has 831 authors who have published 1855 publications receiving 55316 citations.

Schur Q -Functions and Degeneracy Locus Formulas for Morphisms with Symmetries

Abstract: We give closed-form formulas for the fundamental classes of degeneracy loci associated with vector bundle maps given locally by (not necessary square) matrices which are symmetric (resp. skew-symmetric) w.r.t. the main diagonal. Our description uses essentially Schur Q-polynomials of a bundle and is based on a push-forward formula for these polynomials in a Grassmann bundle, established in [P4].

Determinization of Transducers over Infinite Words

Abstract: We study the determinization of transducers over infinite words. We consider transducers with all their states final. We give an effective characterization of sequential functions over infinite words. We also describe an algorithm to determinize transducers over infinite words.

A Spatial Decision Support System To Optimize Inspection, Maintenance And Reparation Operations Of River Levees

Abstract: More and more floods occurred over the last decade in France and in the world, causing important damages and significant costs. Moreover, levees are often not well maintained, so they hardly resist to major floods and can break easily. At French national scale, the length of levees, estimated to 7500 kilometers, and the lack of data all along these infrastructures complicates their management. In this frame, levee managers need approaches and tools in order to be helped in their maintenance decision. The goal of our research is to develop methods modeling levee failure mechanisms and allowing performance levee assessment. From collected data (detailed visual inspections, laboratory tests, historical data, etc.), we establish indicators able to assess levee condition and performance. These methods integrated in an existing GIS dedicated to levee management will contribute to obtain a spatial decision support system aiding levee managers in their maintenance decision. Our communication presents in a first part the development of the “Levee GIS” and an example of its current functionalities. In a second part we describe the models that have been set up to assess levee performances and we describe their integration into a new prototype version of the “Levee GIS”.

Co-operation and Unilateral Commitment in the Presence of Global Environmental Problems

Abstract: This paper focuses on the link between group co-operation and unilateral commitment of some countries in the presence of global environmental problems. We show that in case of a failure of negotiation, some countries can decide to commit unilaterally and reduce their emissions. we call this behaviour precautionary commitment. Absence of international agreement does not mean global defection from the environmental issue. we also show that the emergence of a non-co-ordinated global co-operation can result from a strategic action from the members of the coalition. The insiders of the coalition create an incentive for the non-members to reduce without co-ordinating their emissions.