Introduction. Les expressions muséales de l’entreprise

The ties between museums and companies are strong and longstanding and have been strengthened in recent years as certain businesses, especially in luxury, industrial and food sectors, have sought to highlight their heritage and craft by opening their own museums. For many, a museum serves as a window on their expertise and as a creative space, a recognized phenomenon which has shown that the relationship between museums and companies is not just a matter of the former preserving the latter’s products once they have become obsolete. This issue of Culture & Musées aims to understand the cultural, heritage and economic issues at stake in the meeting of these two worlds, companies and museums.Les musées et les entreprises entretiennent des liens étroits, un phénomène ancien qui a connu un développement important ces dernières années lorsque certains secteurs – luxe, industrie, alimentaire – ont voulu valoriser leur patrimoine et leur savoir-faire en ouvrant des musées. Pour de nombreux secteurs, le musée d’entreprise est une vitrine du savoir-faire et un lieu de créativité, un phénomène avéré qui montre que les relations entre les musées et les entreprises ne reposent pas seulement sur la conservation de productions au moment où elles ne sont plus fabriquées. Ce dossier a l’ambition de comprendre les enjeux culturels, patrimoniaux et économiques qui se jouent dans cette rencontre entre le monde de l’entreprise et celui du musée

Utiliser le livre dans la médiation scientifique: Guide pratique à l’usage des professionnels

International audienceUn livre, des images, une histoire, des personnages, une aventure… Depuis Jules Verne on sait combien le livre peut être un point d’entrée dans la science. Mais aujourd’hui, quelle est la place du livre dans la diffusion des sciences ? Est-il utilisé de la manière la plus efficace ? Comment faire pour l’exploiter comme un réel outil de médiation scientifique ?Véritable guide destiné aux professionnels de la médiation, cet ouvrage est né de deux ans d’observation des bonnes pratiques de médiateurs et médiatrices scientifiques intervenant au sein des parcs naturels, musées, centres de diffusion de la culture scientifique et technique, etc.Composée de fiches actions synthétiques, pratiques et reproductibles, une première partie réunit les bonnes idées, les questions à se poser, les coûts, et les écueils à éviter pour tous les types de médiation construits autour du livre et de la lecture.La seconde partie, centrée sur la mise en place du processus d’évaluation, permet de juger de l’efficacité et de la pertinence de l’action menée, afin de l’ajuster et de la faire évoluer pour une meilleure efficacité auprès du public

Neurophysiology of gaze orientation: Core neuronal networks

First revision of a chapter for the Encyclopedia of the Human Brain, Jordan Grafman (Editor), Angela Sirigu and Jean-René Duhamel (Second Editors)International audienceThe appearance of an object triggers a shift of gaze toward its location. This orienting response consists of a rapid rotation of the eyes, the saccade, sometimes accompanied by a head rotation. In this chapter, instead of describing the path leading from the target-evoked retinal activity to the changes in muscle tension, we shall take the reverse path. Starting from the muscle contractions, we shall proceed upstream and describe the core neuronal networks in the brainstem and cerebellum that enable us to rapidly and accurately orient the foveae towards visual targets located at different eccentricities and depths.L’apparition d’un objet déclenche un mouvement du regard vers son emplacement. Cette réponse d'orientation consiste en une rotation rapide des yeux, la saccade, parfois accompagnée d'une rotation de la tête. Dans ce chapitre, au lieu de décrire le chemin menant de l'activité rétinienne évoquée par la cible aux changements de tension musculaire, nous emprunterons le chemin inverse. A partir des contractions musculaires, nous procéderons en amont et décrirons les réseaux neuronaux centraux du tronc cérébral et du cervelet qui nous permettent d'orienter rapidement et précisément la fovéa vers des cibles visuelles situées à différentes excentricités et profondeurs

COMPOUND POISSON STATISTICS FOR DYNAMICAL SYSTEMS VIA SPECTRAL PERTURBATION

We consider random transformations T n ω := T σ n-1 ω •• • ••T σω •T ω , where each map T ω acts on a complete metrizable space M. Associated with this random map cocycle is a transfer operator cocycle L n ω,0 := L σ n-1 ω,0 •• • ••L σω,0 •L ω,0 , where L ω,0 is the transfer operator for the map T ω. The randomness comes from an invtertible and ergodic driving map σ : Ω → Ω acting on a probability space (Ω, F, m). We introduce a family of random holes H ω,n into M , from which we define a perturbed cocycle L ω,n,s (•) := L ω,0 (•e is1 Hω,n). We develop a spectral approach for quenched compound Poisson statistics that considers random dynamics and random observations. To facilitate this we introduce the random variable S ω,n,n (x) := n-1 j=0 1 H σ j ω,n (T j ω x), which counts the number of visits to random holes in a suitably scaled time interval. Under suitable assumptions, we show that in the n → ∞ limit, the characteristic function of the random variable S ω,n,n converges pointwise to the characteristic function of a random variable that is discrete and infinitely divisible, and therefore compound-Poisson distributed. We provide several explicit examples for piecewise monotone interval maps in both the deterministic and random settings

Musique-fiction des XXe et XXIe siècle: vers une réflexion portant sur le livre « augmenté »

International audienceMusique-fiction des XXe et XXIe siècle : vers une réflexion portant sur le livre « augmenté ». Pour contribuer au numéro de la collection « Poétiques comparatistes » consacré aux rapports de la littérature et de la musique, je propose de mettre en avant, dans le prolongement d'une recherche consacrée à l'hybridité musico-littéraire 1 , une catégorie générique que l'on peut dénommer « musique-fiction », en prenant précisément appui tout d'abord sur trois oeuvres de la deuxième moitié du XXe siècle (oeuvres de Charles Reznikoff, de Robert Schneider et d'Alessandro Baricco), avant d'aborder la problématique du livre « augmenté » 2 à partir de références à différents textes du début du XXIe siècle (textes de Tiziano Scarpa, d

HybPSF: Hybrid Point-spread Function Reconstruction for the Observed JWST NIRCam Image

International audienceThe James Webb Space Telescope (JWST) marks a new era of astronomical observation and discovery, providing unrivaled precision in various measurements, including photometry, morphology, and shear measurement. Accurate point-spread function (PSF) models are essential for many of these measurements. In this paper, we introduce HybPSF, a hybrid PSF construction method for JWST NIRCam imaging data that combines the WebbPSF software, which simulates the PSF for JWST, with observed data to produce more accurate and reliable PSF models. We apply this method to the SMACS J0723 imaging data and construct supplementary structures from residuals obtained by subtracting the WebbPSF PSF model from the data. Our results show that HybPSF significantly reduces discrepancies between the PSF model and the data compared to WebbPSF. Specifically, the PSF shape parameter ellipticity and size comparisons indicate that HybPSF improves precision by approximately 10 times for R$^{2}$ and 50% for e. This improvement has important implications for astronomical measurements using JWST NIRCam imaging data

Entre imitation et appropriation : vers la définition d’un art monétaire celtique

International audienc

Characterization and structural study of a novel β‐ N ‐acetylgalactosaminidase from Niabella aurantiaca

International audienceWe report here the identification, characterization and three‐dimensional (3D) structure determination of Na Nga, a newly identified β‐ N ‐acetylgalactosaminidase from the Gram‐negative soil bacterium Niabella aurantiaca DSM 17617. When recombinantly expressed in Escherichia coli , the enzyme selectively cleaved 4‐nitrophenyl‐ N ‐acetyl‐β‐ d ‐galactosamine ( p NP‐β‐ d ‐Gal p NAc). The X‐ray crystal structure of the protein was refined to 2.5 Å and consists of an N‐terminal β‐sandwich domain and a (β/α) 8 barrel catalytic domain. Despite a mere 22% sequence identity, the 3D structure of Na Nga is similar to those previously determined for family GH123 members, suggesting it also employs the same substrate‐assisted catalytic mechanism. Inhibition by N ‐acetyl‐galactosamine thiazoline (GalNAc‐thiazoline) supports the suggested mechanism. A phylogenetic analysis of its proximal sequence space shows significant clustering of unknown sequences around Na Nga with sufficient divergence with previously identified GH123 members to subdivide this family into distinct subfamilies. Although the actual biological substrate of our enzyme remains unknown, examination of the active site pocket suggests that it may be a β‐ N ‐acetylgalactosaminide substituted by a monosaccharide at O‐3. Analysis of the genomic context suggests, in turn, that this substituted β‐ N ‐acetylgalactosaminide may be appended to a d ‐arabinan from an environmental Actinomycete

Disentangling microbial networks across pelagic zones in the tropical and subtropical global ocean

International audienceAbstract Microbial interactions are vital in maintaining ocean ecosystem function, yet their dynamic nature and complexity remain largely unexplored. Here, we use association networks to investigate possible ecological interactions in the marine microbiome among archaea, bacteria, and picoeukaryotes throughout different depths and geographical regions of the tropical and subtropical global ocean. Our findings reveal that potential microbial interactions change with depth and geographical scale, exhibiting highly heterogeneous distributions. A few potential interactions were global, meaning they occurred across regions at the same depth, while 11-36% were regional within specific depths. The bathypelagic zone had the lowest proportion of global associations, and regional associations increased with depth. Moreover, we observed that most surface water associations do not persist in deeper ocean layers despite microbial vertical dispersal. Our work contributes to a deeper understanding of the tropical and subtropical global ocean interactome, which is essential for addressing the challenges posed by global change

Resource Categories from Differential Categories

National audienceResource categories were recently introduced to capture the categorical structure of pointer concurrent games, and in particular to characterize morphisms behaving "linearly". These linear morphisms correspond to (beta-normal, etaexpanded) terms of the resource lambda-calculus. Resource calculus is closely related to Erhrard and Regnier's differential lambda-calculus, which is usually interpreted in differential categories (defined by Blute, Cockett, Lemay and Seely). However, strategies of pointer concurrent games are not built from a model of linear logic, so their categorical structure is not a differential category. Nevertheless, resource categories can be constructed from differential categories. We present such a construction in this paper, starting from an additive monoidal category and building a resource category from it