Search results for "ARISA"
showing 10 items of 310 documents
Systèmes financiers et canaux de transmission de la politique monétaire
2010
This dissertation analyses the consequences of transformations in the financial sphere on the transmission channels of decisions in monetary policy in industrialized countries over the past several years. We observe that as a result of these transformations, banking institutions have evolved from an originate to hold model to an originate to distribute model. This has enabled banks to turn more toward derivative products and credit risk transfer instruments. We demonstrate that these techniques of active/passive management have completely revolutionized the theoretical foundations of traditional channels and in particular the credit channel. Our analysis of these landmark changes is organiz…
Le trou noir de synthèse, un divertissement éducatif ?
2013
National audience; Au-delà de l'argument pédagogique, l'emploi d'images de synthèse dans les émissions télévisées sur l'astronomie relève aussi du spectacle ludique, que certains créateurs assument sans complexe. Cet article propose justement de confronter deux programmes mettant en scène - de manière diamétralement opposée - la découverte d'un super-trou noir au centre de la Voie Lactée, afin de révéler leur promesse respective, la manière dont ils la tiennent et questionner ainsi la pertinence de la dichotomie traditionnelle " éducation / divertissement ".
Comparative study assessing effects of sonic hedgehog and VEGF in a human co-culture model for bone vascularisation strategies.
2011
The morphogen sonic hedgehog (Shh) seems to mediate adult repair processes in bone regeneration and vascularisation. In this study we investigated the effects of Shh on co-cultures consisting of human primary osteoblasts and outgrowth endothelial cells in terms of angiogenic activation and vessel maturation in comparison to the treatment with the commonly used proangiogenic factor, VEGF. Both, stimulation with VEGF or Shh, leads to an increase in the formation of microvessel-like structures compared to untreated controls. In contrast to VEGF, proangiogenic effects by Shh could already be observed after 24 h of treatment. Nevertheless, after 14 days the angiogenic activity of OEC was compara…
Temporal dynamic of biofilms enhances the settlement of the central-Mediterranean reef-builder Dendropoma cristatum (Biondi, 1859).
2021
Abstract Research on marine invertebrate settlement provides baseline knowledge for restoration technique implementation, especially for biogenic engineers with limited dispersion ability. Previously, we determined that the maturity of a biofilm strongly enhances the settlement of the vermetid reef-builder Dendropoma cristatum. To elucidate settlement-related biofilm features, here we analyse the structure and composition of marine biofilms over time, through microscopic observations, eukaryotic and prokaryotic fingerprinting analyses and 16S rDNA Illumina sequencing. The vermetid settlement temporal increase matched with the higher biofilm coverage on the substratum and the reduction of th…
How bright are the Nordic Lights? : job quality trends in Nordic countries in a comparative perspective
2017
Nordic countries stand out from the rest of the Europe in terms of job quality. Comparative research literature sought to explain the distinctiveness of Nordic countries with diverse sets of institutional frameworks. However, global competition, technological revolution and deregulation are common developments throughout the industrial world – processes which are seen to erode the meaning of institutions and nation states as protective mechanisms. This dissertation discusses the question on the existence and persistence of the Nordic working life model through the concept of job quality, which are investigated using surveys on working conditions. The study draws from both universal and inst…
Impact of textual data augmentation on linguistic pattern extraction to improve the idiomaticity of extractive summaries
2021
International audience; The present work aims to develop a text summarisation system for financial texts with a focus on the fluidity of the target language. Linguistic analysis shows that the process of writing summaries should take into account not only terminological and collocational extraction, but also a range of linguistic material referred to here as the "support lexicon", that plays an important role in the cognitive organisation of the field. On this basis, this paper highlights the relevance of pre-training the CamemBERT model on a French financial dataset to extend its domainspecific vocabulary and fine-tuning it on extractive summarisation. We then evaluate the impact of textua…
La science aux chansons : réflexions sur un objet médiatique-populaire en vulgarisation scientifique
2012
International audience
Beyond ideal two-dimensional metals: Edges, vacancies, and polarizabilities
2018
Recent experimental discoveries of graphene-stabilized patches of two-dimensional (2D) metals have motivated also their computational studies. However, so far the studies have been restricted to ideal and infinite 2D metallic monolayers, which is insufficient because in reality the properties of such metallic patches are governed by microstructures pervaded by edges, defects, and several types of perturbations. Here we use density-functional theory to calculate edge and vacancy formation energies of hexagonal and square lattices of 45 elemental 2D metals. We find that the edge and vacancy formation energies are strongly correlated and decrease with increasing Wigner-Seitz radii, analogously…
Contribution à l'estimation non paramétrique des quantiles géométriques et à l'analyse des données fonctionnelles
2008
In this dissertation we study the nonparametric geometric quantile estimation, conditional geometric quantiles estimation and functional data analysis. First, we are interested to the definition of geometric quantiles. Different simulations show that Transformation-Retransformation technique should be used to estimate geometric quantiles when the distribution is not spheric. A real study shows that, data are better modelized by geometric quantiles than by marginal one's, especially when variables that make up the random vector are correlated. Then we estimate geometric quantiles when data are obtained by survey sampling techniques. First, we propose an unbaised estimator, then using lineari…
Differential inclusions involving normal cones of nonregular sets in Hilbert spaces
2017
This thesis is dedicated to the study of differential inclusions involving normal cones of nonregular sets in Hilbert spaces. In particular, we are interested in the sweeping process and its variants. The sweeping process is a constrained differential inclusion involving normal cones which appears naturally in several applications such as elastoplasticity, electrical circuits, hysteresis, crowd motion, etc.This work is divided conceptually in three parts: Study of positively alpha-far sets, existence results for differential inclusions involving normal cones and characterizations of Lyapunov pairs for the sweeping process. In the first part (Chapter 2), we investigate the class of positivel…