No description available.

The overall purpose of this study is to create an in-depth understanding of how coaches for children and young people in padel reflect about being coaches in the private sector in relation to the non-profitsector. To answer this purpose the following questions were asked: How do padel coaches experience that their leadership and training activities are affected or changed depending on whether they are hiredby a private or non-profit client? What contextual aspects do coaches state as reasons for this? What are the advantages and disadvantages of each sector according to the coaches? The empiric data in this study was collected through qualitative interviews via Zoom with six different padel coaches across Sweden who practices in the private sport sector. The primarily results demonstrates that the padel coaches generally experience several differences between the private and the voluntary sector and that these differences are both complex and difficult to handle. Some of the differences are connected to areas like education, quality in training, economic and inclusion aspects. Additionally, it shows that these differences could have an impact on the padel coaches and their leadership, but it could also affect the children practicing this sport

Tout comme l’entraînement, la recherche en science du sport est un facteur déterminant de la performance sportive. À travers l’étude d’une activité physique intermittente, le badminton, le prisme des concepts biomécaniques, physiologiques et physiques convergent vers une approche pluridisciplinaire des déterminants de la performance sportive. Ainsi, l’objectif de l’ensemble de ce travail doctoral est, à la fois, la prédiction de la performance en badminton et la compréhension des mécanismes de production d’une vitesse de volant proche des 500 km/h. Les réponses physiologiques et neuromusculaires ont permis la mise en place d’un test discriminant spécifique, prédictif du niveau d’expertise, et proche des situations écologiques d’un match. Paradoxalement, les causes des mécanismes neurophysiologiques liés à la fatigue induite lors d’un match prolongé restent toutefois inconnues. Il apparaît primordial d’approfondir les dits mécanismes vraisemblablement à l’origine de la diminution de la performance sportive. Les évolutions des observables de match, de la force maximale et de la puissance des membres supérieurs et inférieurs convergent vers une diminution progressive au cours de la pratique. Corollairement, la compréhension des mécanismes d’optimisation de la vitesse du volant a permis de mettre en exergue des principes biomécaniques et physiques déterminant lors de la prédiction d’une grande vitesse de volant lors d’une performance maximale. En effet, les principes d’adjonction des segments et d’étirement-renvoi influencent largement la vitesse de la main. En complément, le principe de bras de levier et l’effet élastique de la raquette permettent également d’accroître la vitesse de la raquette. Enfin, la conservation de la quantité de mouvement et le coefficient de restitution contribuent finalement à la vitesse du volant. / Just like training, sport science research is a key factor in sports performance. Through the study of intermittent physical activity, in this case badminton, biomechanical, physiological and physical concepts emerge and offer a multidisciplinary approach of the determinants of sport performance. Thus, the goal of this doctoral work is both the study of badminton in the performance prediction and the understanding of the mechanisms in the production of wheel velocity close to 500 km/h. The physiological and neuromuscular responses enabled the establishment of a specific discriminatory test, predicting the level of expertise, and close to the ecological conditions of a match. Paradoxically, the causes of neurophysiological mechanisms associated with the fatigue induced by a prolonged game remain unknown. It appears heuristic to further study those mechanisms which are at the origin of a decrease in athletic performance. The evolution of observable match variables, the maximum strength and the power of the upper and lower limbs converge towards a gradual decrease in the practice. As a corollary, the understanding of the optimisation of the speed of the flywheel mechanisms helped to highlight the biomechanical and physical principles, essential in predicting a large wheel speed during a maximum performance. Indeed, the principles of adding segments and stretching shortening cycle largely influence the speed of the hand. In addition, the principle of the lever arm and the elastic effect of the racket also increase the speed of the racket. Finally, the conservation of the momentum and the restitution coefficient ultimately contribute to the speed of the shuttlecock.

Bootstrap is a computer-programming curriculum that teaches students to program video games using Racket, a functional programming language based on algebraic syntax. This study investigated the relationship between learning to program video games from a Bootstrap course and the resulting effect on students' understanding of algebra. Courses in three different schools, lasting about six weeks each, were studied. Control and treatment groups were given a pre and post algebra assessment. A qualitative component consisting of observations and interviews was also used to further triangulate findings. Statistical analysis revealed that students who completed the Bootstrap course gained a significantly better understanding of variables and a suggestive improvement in understanding functions. In the assessments, students failed to demonstrate a transfer of the advanced concepts of function composition and piecewise functions from programming to algebraic notation. Interviews with students demonstrated that with coaching, students were able to relate functions written in Racket to functions written in algebraic notation, but were not yet able to transfer their experience of function composition from programming to algebra.

WebAssembly is an instruction set designed for a stack based virtual machine, with an emphasis on speed, portability and security. As the use cases for WebAssembly grow, so does the desire to target WebAssembly in compilation. In this thesis we present Rasm, a Racket to WebAssembly compiler that compiles a select subset of the top forms of the Racket programming language to WebAssembly. We also present our early findings in our work towards adding a WebAssembly backend to the Chez Scheme compiler that is the backend of Racket. We address initial concerns and roadblocks in adopting a WebAssembly backend and propose potential solutions and patterns to address these concerns. Our work is the first serious effort to compile Racket to WebAssembly, and we believe it will serve as a good aid in future efforts of compiling high-level languages to WebAssembly.

No description available.

This thesis aims to describe the proposed implementation process of the introduction of padel in the Czech Republic and to draw up a business plan to build the first padel centre in the Czech Republic called Padel centre Prague. The main analytical method is a detailed financial plan on which economic indicators of implementation of this investment project are quantified. Leading procedures for detecting data are questionnaire surveys, telephone query and also an estimate, which is used mainly in the analysis of the financial plan. The estimated average payback period for this investment is 3.2 years, while the real recovery of funds spent on the construction of padel centre should occur during the fifth year of its operation.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Bakgrund: Padeltennis, en sport som på kort tid ökat explosionsartat i Sverige och lockat till sig många utövare- unga som gamla, tränade som otränade, kvinnor som män. Att börja med en ny sport kan innebära nya påfrestningar på kroppen, däribland många repetitiva slag som kan leda till överbelastningsskador samt akuta skador som det visat sig i studier för idrottare. Målet med denna studie är att öka kunskapen för det skadeförebyggande arbetet samt rehabiliteringsprocessen för denna målgrupp. Syfte: Syftet med studien var att undersöka skadepanorama samt identifiera de främst förekommande skadelokalisationerna inom padeltennis för att kartlägga och analysera skadorna i förhållande till kön, ålder och nivå hos padeltennisspelare. Metod: En kvantitativ kunskapsansats med retrospektiv design valdes. Insamlingen av data skedde genom delning av en egenutformad digital enkät både genom sociala medier samt padelhallar runt om i landet. Resultat: 610 personer deltog i studien varpå 56,5% uppgav att de haft en skada till följd av padelspel det senaste året. Den kroppsdel som varit mest utsatt för överbelastningsskador var armbåge medan fot/fotled hade flest akuta skador. Analys av skadefrekvensen visade ingen märkbar skillnad bland könen, däremot hade de äldre åldersgrupperna samt de högre spelarnivåerna något större skadefrekvens. Konklusion: Denna studie kan ses som ett första steg för ett skadeförebyggande arbete inom padel. Likt andra studier visar denna att skador inom padel förekommer, dock behövs det fler standardiserade studier inom ämnet för att lättare jämföra resultat av framtida undersökningar.

A l'instar des autres métropoles subsahariennes, Abidjan traverse une crise multiforme. Elle se traduit, entre autres, par une croissance urbaine accélérée, par une réduction des emplois modernes et, par voie de conséquence, par un renforcement des activités de l'informel, le tout dans un contexte d'affaiblissement de l'Etat et de son administration. Comme tous les secteurs socio-économiques, celui des transports n'a pas été épargné par cette crise. L'extension spatiale rapide conjuguée à la pression démographique et les changements des principes gestionnaires ont influé sur le système de transport collectif. Ces facteurs ont entraîné l'essor du secteur privé populaire : woro-woro et gbaka. L'initiative privée pallie l'insuffisance d'Etat régulateur et a ouvert la porte à diverses pratiques illicites comme la corruption et le racket dans le secteur. Les transports populaires constituent un secteur pourvoyeur d'emplois. Leur dynamique a permis une certaine amélioration du transport urbain local. En revanche, elle pose un certain nombre de problèmes urbanistiques et gestionnaires. Les rues, les trottoirs et les carrefours sont détournés de leur fonction circulatoire au profit d'une émergence de gares spontanées. Les recettes générées constituent une manne financière pour les acteurs, l'Etat et les collectivités locales peu efficaces à réguler ces activités sur le territoire urbain