De l’image au paysage sonore, la passion du théâtre public

Je retrouve André Serré à la « Brasserie Populaire » du TNP. Il me dira qu’elle lui rappelle des souvenirs : c’était la salle de couture à l’époque de Planchon. André Serré est un homme de théâtre, du théâtre. Il est connu comme ingénieur du son mais il a d’abord et toujours voulu être metteur en scène. Jeune professeur de lettres, il est d’abord entré au TNP comme spectateur, comme simple abonné puis devient responsable d’un groupe d’abonnés. Il est resté permanent dans « la maison » pendant..

A note on shortest paths in the plane subject to a constraint on the derivative of the curvature

Disponible dans les fichiers attachés à ce documen

Shortest path of bounded curvature in the plane

Disponible dans les fichiers attachés à ce documen

A Critical Review on the Assumptions of SETI

The Search for Extraterrestrial Intelligence (SETI) makes certain assumptions which guide all current search programs. To illustrate some, this includes (1) that interstellar flight is not possible (2) that the motivations of interstellar cultures are based largely on anthropomorphic understandings of homo sapiens (3) that the Fermi Paradox and the Drake equation are the starting point (axioms) of all reasoning (4) that definitions of 'life' are based largely on our understanding of homeostasis (5) that radio waves are the most likely method of interstellar communications (6) that unknown single event source signatures detected in space are not amenable to scrutiny due to the demands of the scientific method to be reproducible (7) that such anomalous signatures are either astronomical or communications based in type with no consideration for emissions from advanced industrialisation or propulsion and power technology. These assumptions, and others, have guided the SETI community towards a constrained level of thinking that is equivalent to philosophical dogma. In this paper, we unpack these assumptions, and others, and argue that the potential for life and intelligent life in the Cosmos may be much greater than the SETI community currently appears to conclude. It is also argued that more progress in our underanding of our place in the Cosmos can be made, if the separate disciplines of astronomy, interstellar spacecraft design, SETI, biology and philosophy can work together in a complementary way. Presented at the 47th IAA Symposium on the Search for Extraterrestrial Intelligence. SETI and Society.Comment: 14 pages, 7 figures, submitted to Acta Astonautica, 19th December 2018, presented at the 47th IAA Symposium on SETI, Breme

Reading in the digital era: performance and avenues for change in France and French-speaking Belgium - Documentary texts reading: What makes the difference ?

For the past ten years, the description of digital skills and their mastery have been at the focus of literacy experts, as they represent a citizenship issue (Morais, 2018). However, in the last round of PIRLS survey in 2021, French and french-speaking Belgian pupils did not take part in the section specifically dedicated to digital reading, and many questions remain unanswered. Would performance in digital documentary reading have been similar to the poor performance in paper-based documentary reading? Would new difficulties have arisen? In order to report on the skills of French and Belgian pupils in reading this type of texts and to give us a better idea of their difficulties, we designed a digital documentary reading test based on the ePIRLS typology (extract, infer, interpret, evaluate) and administered it to over 350 Belgian and French 4th and 5th primary grade pupils. The aim of this paper is to paint a picture of the performance and strategies used in a digital documentary reading situation, before suggesting ways of integrating this teaching into the classroom. Bautier, É., Crinon, J., Delarue-Breton, C., & Marin, B. (2012). Les textes composites : Des exigences de travail peu enseignées ? Repères, 45, 63‑79. https://doi.org/10.4000/reperes.136 Morais, J. (2018). Literacy and democracy. Language, Cognition and Neuroscience, 33(3), 351‑372. https://doi.org/10.1080/23273798.2017.1305116 Schillings, P., Rappe, J., & Dupont, V. (2023). La place du numérique dans l’enseignement et l’apprentissage de la lecture (PIRLS 2021-Dossier n°2). Université de Liège. https://orbi.uliege.be/handle/2268/30673

Comparison of two paradigms based on stimulation with images in a spelling brain-computer interface.

A BCI Speller is a typical Brain-Computer Interface (BCI) system for communication purposes. This technology can provide users with severe motor disability with an assistive device controlled by brain activity. The present preliminary study, with only four subjects, is focused on the control of a 5x5 P300-based speller matrix for communication purposes. In this work, we study the effect of flashing stimuli used to highlight the letters in two conditions: pictures and red famous faces (that is, famous faces coloured in red). These preliminary results, based on performance and the Information Transfer Rate (ITR), showed that both conditions are similar, obtaining very good performance compared to conventional P300-speller. In this sense, the use of pictures does not make the performance worse, allowing to develop more attractive and usable interfaces. More tests would confirm if there is a difference in performance between the two conditions proposed.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Comparison of Two Paradigms Based on Stimulation with Images in a Spelling Brain–Computer Interface

A P300-based speller can be used to control a home automation system via brain activity. Evaluation of the visual stimuli used in a P300-based speller is a common topic in the field of brain–computer interfaces (BCIs). The aim of the present work is to compare, using the usability approach, two types of stimuli that have provided high performance in previous studies. Twelve participants controlled a BCI under two conditions, which varied in terms of the type of stimulus employed: a red famous face surrounded by a white rectangle (RFW) and a range of neutral pictures (NPs). The usability approach included variables related to effectiveness (accuracy and information transfer rate), efficiency (stress and fatigue), and satisfaction (pleasantness and System Usability Scale and Affect Grid questionnaires). The results indicated that there were no significant differences in effectiveness, but the system that used NPs was reported as significantly more pleasant. Hence, since satisfaction variables should also be considered in systems that potential users are likely to employ regularly, the use of different NPs may be a more suitable option than the use of a single RFW for the development of a home automation system based on a visual P300-based speller.This work was partially supported by the project PID2021-127261OB-I00 (SICODIS), funded by MCIN (Ministerio de Ciencia e Innovación)/AEI (Agencia Estatal de Investigación)/10.13039/501100011033/FEDER, UE (Fondo Europeo de Desarrollo Regional). The work was also partially supported by the University of Málaga (Universidad de Málaga). Partial funding for open access charge: Universidad de Málag

Engineering Ising-XY spin models in a triangular lattice via tunable artificial gauge fields

Emulation of gauge fields for ultracold atoms provides access to a class of exotic states arising in strong magnetic fields. Here we report on the experimental realisation of tunable staggered gauge fields in a periodically driven triangular lattice. For maximal staggered magnetic fluxes, the doubly degenerate superfluid ground state breaks both a discrete Z2 (Ising) symmetry and a continuous U(1) symmetry. By measuring an Ising order parameter, we observe a thermally driven phase transition from an ordered antiferromagnetic to an unordered paramagnetic state and textbook-like magnetisation curves. Both the experimental and theoretical analysis of the coherence properties of the ultracold gas demonstrate the strong influence of the Z2 symmetry onto the condensed phase

Étude de la marqueterie d’un secrétaire à gradin du xviiie siècle

Le secrétaire à gradin (inv. V4081) conservé au musée du Louvre a fait l’objet d’une restauration en 2013 dans les ateliers du Centre de recherche et de restauration des musées de France (C2RMF), au pavillon de Flore. L’intervention s’est accompagnée d’une importante étude matérielle de la partie polychromée de la marqueterie. Les procédés de mise en œuvre de la couche picturale et de la couche de corne qui la protège ont nécessité d’adapter la méthodologie par le couplage de multiples techniques d’examens et d’analyses. Le recoupement de l’ensemble des données a permis de caractériser finement les matériaux utilisés pour deux interventions distinctes de polychromies et de mieux cerner les dates de leur mise en œuvre.The Louvre’s drop-front secretary desk with drawers (inv. V4081) was restored in 2013 in the workshops of the Centre de Recherche et de Restauration des Musées de France (C2RMF), in the Pavillon de Flore. The restoration went hand in hand with a detailed material study of the polychromed part of the marquetry. The manner of applying the layer of pigment and the veneer of horn that protected it required the methodology to be adapted through the interaction of multiple tests and analysis techniques. By cross-referencing all the data obtained, the materials used for the two separate polychromy procedures were distinguished and dated more precisely

Non-Abelian gauge fields and topological insulators in shaken optical lattices

Time-periodic driving like lattice shaking offers a low-demanding method to generate artificial gauge fields in optical lattices. We identify the relevant symmetries that have to be broken by the driving function for that purpose and demonstrate the power of this method by making concrete proposals for its application to two-dimensional lattice systems: We show how to tune frustration and how to create and control band touching points like Dirac cones in the shaken kagom\'e lattice. We propose the realization of a topological and a quantum spin Hall insulator in a shaken spin-dependent hexagonal lattice. We describe how strong artificial magnetic fields can be achieved for example in a square lattice by employing superlattice modulation. Finally, exemplified on a shaken spin-dependent square lattice, we develop a method to create strong non-Abelian gauge fields.Comment: 5 pages, 4 figures + supplemental material (2 pages, 1 figure). Accepted for publication in Phys. Rev. Lett.. Minor changes with respect to version 2 to improve presentatio