Optimal speed in Thoroughbred horse racing

The objective of this work is to provide a mathematical analysis on how a Thoroughbred horse should regulate its speed over the course of a race to optimize performance. Because Thoroughbred horses are not capable of running the whole race at top speed, determining what pace to set and when to unleash the burst of speed is essential. Our model relies on mechanics, energetics (both aerobic and anaerobic) and motor control. It is a system of coupled ordinary differential equations on the velocity, the propulsive force and the anaerobic energy, that leads to an optimal control problem that we solve. In order to identify the parameters meaningful for Thoroughbred horses, we use velocity data on races in Chantilly (France) provided by France Galop, the French governing body of flat horse racing in France. Our numerical simulations of performance optimization then provide the optimal speed along the race, the oxygen uptake evolution in a race, as well as the energy or the propulsive force. It also predicts how the horse has to change its effort and velocity according to the topography (altitude and bending) of the track

COVID-19 symptoms at hospital admission vary with age and sex: results from the ISARIC prospective multinational observational study

Background: The ISARIC prospective multinational observational study is the largest cohort of hospitalized patients with COVID-19. We present relationships of age, sex, and nationality to presenting symptoms. Methods: International, prospective observational study of 60 109 hospitalized symptomatic patients with laboratory-confirmed COVID-19 recruited from 43 countries between 30 January and 3 August 2020. Logistic regression was performed to evaluate relationships of age and sex to published COVID-19 case definitions and the most commonly reported symptoms. Results: ‘Typical’ symptoms of fever (69%), cough (68%) and shortness of breath (66%) were the most commonly reported. 92% of patients experienced at least one of these. Prevalence of typical symptoms was greatest in 30- to 60-year-olds (respectively 80, 79, 69%; at least one 95%). They were reported less frequently in children (≤ 18 years: 69, 48, 23; 85%), older adults (≥ 70 years: 61, 62, 65; 90%), and women (66, 66, 64; 90%; vs. men 71, 70, 67; 93%, each P < 0.001). The most common atypical presentations under 60 years of age were nausea and vomiting and abdominal pain, and over 60 years was confusion. Regression models showed significant differences in symptoms with sex, age and country. Interpretation: This international collaboration has allowed us to report reliable symptom data from the largest cohort of patients admitted to hospital with COVID-19. Adults over 60 and children admitted to hospital with COVID-19 are less likely to present with typical symptoms. Nausea and vomiting are common atypical presentations under 30 years. Confusion is a frequent atypical presentation of COVID-19 in adults over 60 years. Women are less likely to experience typical symptoms than men

Sur le concept du visage du fils de Dieu de Castellucci, puissances de récits médiatiques, source d'un scandale et du spectacle dans les rues

International audienc

Le corps scenique : Incarnation dramaturgique du pouvoir dans "L’Orestie" de Romeo Castellucci

International audienceDans le spectacle « Orestie » (« Une comédie organique ? ») de 1995, reprise en 2015, Romeo Castellucci poursuit sa démarche de mettre en scène des corps « hors-norme » pour en faire des icônes et objets signifiants du pouvoir et de la domination, des corps rhétoriques incarnant des lieux de pouvoir. À partir d’une analyse dramaturgique du texte originel d’Eschyle, Romeo Castellucci choisit de réinventer cette trilogie dramatique en choisissant d’établir l’ordre matriarcal contre celui patriarcal. Or, cette nouvelle dramaturgie du pouvoir trouve son incarnation dans les corps choisis pour la défendre, tantôt en surcharge pondérale, tantôt amaigris, handicapés ou maltraités, contraints ou bestiaux. Du corps, il ne reste plus que ce pur communicable manipulé, cette matière « organique » qui garantit l’incarnation de la dramaturgie du pouvoir en devenant matériau textuel et dramatique de rhétorique

Emboîtement, effacement et exaltation des corps dans les mises en scènes d'Ilka Schönbein

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La Fête populaire des Rats d’Arras : Du défilé de reconstitution historique et des géants processionnels, au théâtre satirique et banquet gargantuesque

International audienceFrom 1987 to 1995, the Festival of the Rats of Arras was a major cultural event for residents of Arras, municipality and local associations and participated in the revitalization of heritage memory. If it was initially a historical parade, punctuated by a parade of giants and banquets, the Festival of the Rats became part of the axes of political reflection, where the public space is indicated as much as a festive gathering space than that of a resistance.De 1987 à 1995, la Fête des Rats d’Arras représente un événement culturel majeur à la fois pour les Arrageois, les collectivités territoriales et les tissus associatifs locaux et participe à la revitalisation de la mémoire patrimoniale. S’il s’agit initialement d’un défilé de reconstitution historique, ponctué d’une parade des géants et de banquets, la Fête des Rats s’inscrit progressivement dans des axes de réflexions politiques, où l’espace public est envisagé tant comme un espace de rassemblement festif que comme celui d’une résistance. Cette dimension nouvelle se manifestera notamment par le déploiement d’un festival de théâtre de rue satirique, où artistes et publics se réapproprient l’Histoire de la ville d’Arras et son patrimoine

A criança errante e a errância da infância no ‘Teatro Infantile’ de Chiara Guidi

O artigo discute o status da criança no Teatro Infantile com base em entrevistas e publicações de Chiara Guidi e leituras críticas sobre a poiesis e a praxis de seu trabalho. A análise das criações infantis permitiu identificar a transformação da criança-espectadora para a criança-atriz. A Escola Experimental e o Festival Puerilia conduzem a criança ao papel de atuante e mestre de jogo das experiências teatrais. Por fim, os métodos e práticas de Chiara Guidi consideram a criança como modelo e imago, origem e finalidade do teatro de laboratório

L'ob-scène de l'obscène dans les créations d'arts de rue des fakirs de Ma(ka)dam'Kanibal

International audienc

A criança errante e a errância da infância no ‘Teatro Infantile’ de Chiara Guidi

O artigo discute o status da criança no Teatro Infantile com base em entrevistas e publicações de Chiara Guidi e leituras críticas sobre a poiesis e a praxis de seu trabalho. A análise das criações infantis permitiu identificar a transformação da criança-espectadora para a criança-atriz. A Escola Experimental e o Festival Puerilia conduzem a criança ao papel de atuante e mestre de jogo das experiências teatrais. Por fim, os métodos e práticas de Chiara Guidi consideram a criança como modelo e imago, origem e finalidade do teatro de laboratório