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Porovnání vybraných minoritních sportů v ČR z hráčského, diváckého a manažerského hlediska / Comparison of selected minority sports in the Czech Republic from the player, spectator and management aspectsHeteš, Jan January 2012 (has links)
Title: Comparison of selected minority sports in the Czech Republic from the player, spectator and management aspects Objective: The aim of this work is to analyze the current situation in American football, frisbee and lacrosse in Prague and make suggestions for future improvements. Methods: The applied methods included the study of literature, collection of information, questionnaire examining players motivation and SWOT analysis. The research was conducted through surveys among athletes doing this sports. Results: Research has shown that the best prospects are waiting for frisbee, which benefits from minimum requirements for equipment and space. American football and lacrosse will probably never become mass sports, but using the above suggestions can improve their current position. Key words: amateur sport, american football, frisbee, lacrosse, SWOT analysis, motivation
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The (Arab) American Football Field: Examining Intersections of Sport and Social Identity Among Arab American Muslim Women in Detroit, MISutton, Frances January 2022 (has links)
No description available.
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It Wasn't a Revolution, but it was Televised: The Crafting of the Sports Broadcasting ActCrawford, Denis M. 03 May 2017 (has links)
No description available.
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Filosofie a teologie sportu se zřetelem k americkému fotbalu / Philosophy and Theology of Sport with Accent on American FootballSVOBODA, Vojtěch January 2011 (has links)
The thesis is searching for the possible connection between philosophy, theology and sports.
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American Football : A Markovian Approach / Amerikansk fotboll med MarkovkedjorLarsson, Joakim, Sjökvist, Henrik January 2016 (has links)
This bachelor's thesis in applied mathematics & industrial economics is an attempt to model drives in American football using Markov chains. The transition matrix is obtained through logit regression analysis on historical data from the NFL. Different outcomes of drives are modelled as separate absorbing states in the Markov chain. Absorption probabilities are calculated representing the probabilities of each outcome. Results are tested against a Markov chain with the transition matrix based on frequency analysis. Three scoring rules unanimously declare the regression based model to be superior. The application of the model pertains to live sports betting. With the insight provided by the Markovian model, a bettor should be able to make statistically informed betting decisions. The prospect of creating a start-up based on the Markovian betting model is discussed. / Denna kandidatuppsats i tillämpad matematik & industriell ekonomi är ett försök till att modellera drives i amerikansk fotboll med hjälp av Markovkedjor. Övergångsmatrisen fås genom logit-regressionsanalys av historisk data från NFL. Olika utfall av drives modelleras som separata absorberande tillstånd i Markovkedjan. Absorptionssannolikheter beräknas, vilka representerar sannolikheterna för de olika utfallen. Resultaten testas mot en Markovkedja där övergångsmatrisen fås genom frekvensanalys. Tre olika poängregler föredrar enhälligt den regressionsbaserade modellen. Modellens tillämpning berör sportbetting. Med hjälp av Markovmodellen bör en spelare kunna ta statistiskt underbyggda beslut i deras betting. Möjligheterna att skapa ett företag baserat på Markovmodellen diskuteras.
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Design of an American Football Helmet Liner for Concussion MitigationRush, Gustavus Alston 12 August 2016 (has links)
The objective of this research was to develop an optimal design for a polymeric American football helmet liner for concussion prevention utilizing experiments and high performance. Along with well-established injury criteria (HIC, SI, and Peak acceleration), localized brain injury mechanisms were explored by employing Finite Element simulations and experimental validation. Varying strain rate experiments (monotonic and hysteresis) were conducted on modern football helmet (Rush, Rawlings, Riddell, Schutt, and Xenith) liners and new possible polymeric foam liner materials. These experiments were used to characterize each material at low strain rates (0.1/sec; Instron), intermediate strain rates (100-120/sec; NOCSAE drop tower) and high strain rates (600-1000/sec; Split Hopkinson Pressure Bar). Experimental design optimization was performed on a football helmet liner by utilizing an exploratory Design of Experiments by National Operating Committee on Standards for Athletic Equipment (NOCSAE) drop tests. FEA simulations of drop impact tests were conducted on a helmeted NOCSAE headform model and a helmeted human head model. Correlations were made between both models to relate localized brain response to the global acceleration and the dynamic-based injury criteria HIC, SI, and Peak acceleration). FEA simulations were experimentally validated by twin-wire drop tests of the NOCSAE headform using correlations for validation of the human head model. The helmeted human head simulations were used to explore a Mild Traumatic Brain Injury (MTBI) limits based localized brain response (e.g. pressure and impulse). Based on these limits, future FEA simulations will be used to explore these limits as helmet liner design criteria.
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The Effects of COVID-19 on Mental Health and Injury Occurrence of Division III College Football PlayersKennaley, Evan D. January 2022 (has links)
No description available.
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The Hothouse and Dynamic Equilibrium in the Works of Harold PinterFerber, Ben 06 June 2011 (has links)
No description available.
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Studying American Football with Finite Element Analysis and Video Analysis / Undersökning av Amerikansk Fotboll med Finit Element Analys och Video AnalysSliwinski, Daniel January 2021 (has links)
Head injuries in American football is a serious issue regarding player health which is highly affected by velocity and its direction. Impact location can affect the severity of the head injury in both helmet-to-helmet impacts and helmet-to-ground impacts hence the understanding of concussive outcome from velocities and impact locations must be improved. In this thesis a video analysis resulted in simulation of five helmet-to-helmet impacts and two helmet-to-ground impacts, where velocity in each impact also was approximated with the method of least squares to avoid extreme values. The average velocity in helmet-to-helmet impacts was 5.1728 m/s for tackler player and 4.4766 m/s for tackled player and in helmet-to-ground impacts it instead was 6.1975 m/s. With the regression method an average velocity of 4.3982 m/s for tackler player and 5.3854 m/s for the tackled player in helmet-to-helmet impacts and 5.874 m/s in helmet-to-ground impacts. The simulations were performed with LS-DYNA and examined in LS-PrePost where head kinematics and the strain of brain tissue or more specific the maximum principal strain (MPS) was of interest. Further the MPS was scaled to its 95th percentile which determined the concussive likelihood for each impact scenario. The highest concussive outcome for an impact scenario was 100% and the lowest was 15%. The head kinematics of interest was linear acceleration, angular acceleration and angular velocity which in high risk for concussive outcome wasn't dominated by a single head kinematic. Impacts locations in helmet-to-helmet impacts didn't show any connection between impact location and high concussive risk. In helmet-to-ground impacts a connection between impact location at the back of the head and high concussive risk was observed. / Huvudskador inom Amerikansk fotboll är ett återkommande problem när det gäller spelarnas hälsa. Hastigheten och vart tacklingen träffar är starkt kopplat till hur allvarlig en huvudskada kan bli i både hjälm-mot-hjälm tacklingarn och hjälm-mot-mark. För att förhindra huvudskador måste förståelsen om kinematiken och vart tacklingen träffar förbättras. I detta examensarbete gjordes en videoanalys vilket resulterade i fem hjälm-mot-hjälm simuleringar och två hjälm-mot-mark. Hastigheten approximerades också genom att använda uppskattnings metoden minsta kvadratmetoden. Medel-värdet av hastigheterna från videoanalysen blev 5.1728 m/s för spelaren som utförde tacklingen och 4.4766 m/s för spelaren som blev tacklad i hjälm-mot-hjälm tacklingar. I hjälm-mot-mark blev det istället ett medelvärde på 6.1975 m/s. Med uppskattnings metoden blev hastigheterna istället 4.3982 m/s för den tacklande spelaren och 5.3854 m/s för den tacklade spelaren i hjälm-mot-hjälm tacklingar. För hjälm-mot-mark blev medelvärdet av hastigheten 5.874 m/s med uppskattnings metoden. Simuleringarna av tacklings fallen gjordes med LS-DYNA och analyserades i LS-PrePost där huvudets kinematik och töjningen av hjärnvävnad är av intresse. Töjningen mättes av maximum principal strain (MPS) och den 95:e percentilen av MPS för att bestämma risken för hjärnskakning där den största risken för hjärnskakning var 100% och den minsta 15%. För huvudets kinematik var det linjär acceleration, vinkelacceleration och vinkelhastighet som var av intresse. Det fanns ingen koppling mellan endast en av kinematikerna och hög risk för hjärnskakning. Gällande vart tacklingen träffar fanns det ingen koppling mellan vart den träffar och hög risk för hjärnskakning i hjälm-mot-hjälm tacklingar. För hjälm-mot-mark tacklingar fanns det ett samband mellan att bakre delen av huvudet träffar marken och hög risk för hjärnskakning.
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Caractérisation de la physiologie du système moteur primaire en phase aiguë en lien avec les forces biomécaniques à la suite d'un match de footballVinet, Sophie-Andrée 08 1900 (has links)
L’exposition aux impacts commotionnels et sous-commotionnels est une préoccupation majeure dans les sports de contact en raison de leurs effets néfastes sur la santé cérébrale. Des changements physiopathologiques et neurocognitifs ont été constatés après une seule saison de football chez des athlètes exposés à des coups sous-commotionnels. Vu l'absence d'outils sur les lignes de côtés permettant d'identifier les coups sous-commotionnels potentiellement dangereux, il est crucial de mettre au point des mesures objectives pour évaluer les perturbations neuropsychologiques aiguës associées aux chocs à la tête dans les sports de contact. Cette étude a pour but de documenter l'association entre l'exposition aux impacts à la tête pendant un match de football universitaire et les changements à court terme de l’excitabilité du cortex moteur primaire (M1) à l'aide de la stimulation magnétique transcrânienne (SMT). À cette fin, vingt-neuf athlètes masculins de niveau universitaire ont porté des protège-dents instrumentés (iMG) pendant un match de football afin de mesurer l'exposition aux impacts à la tête. Les mesures SMT ont été effectuées 24 heures avant et 1 à 2 heures après le match. De plus, vingt athlètes de football assigné au groupe contrôle ont participé à une séance d'entraînement physique sans contact et ont effectué les mêmes mesures de SMT. Les résultats suggèrent que, par rapport au groupe contrôle, le groupe d'athlètes ayant joué un match de football présentait une désinhibition intracorticale significative (p=0,028) sur l'inhibition intracorticale à intervalle court (SICI 3-ms) après le match. Par ailleurs, les joueurs de football exposés à un plus grand nombre de coups de 40g+ et à des forces cumulées plus importantes dues à des chocs de 40g+ présentaient une désinhibition intracorticale plus importante après le match. Compte tenu les effets délétères d'une diminution de l'inhibition sur le contrôle moteur et l'équilibre, suivre de manière systématique l'exposition aux impacts à la tête des athlètes tout au long de la saison pourrait s'avérer avantageux pour la gestion clinique des risques de blessure. Ces changements observés renforcent la conviction qu’il est nécessaire d’investiguer davantage les effets à long terme de l’exposition aux impacts sous-commotionnels. / Repetitive head impacts and sport-related concussions are significant concerns in contact sports
due to their adverse effects on brain health. Pathophysiological and neurocognitive changes have
been found after a single season of football in athletes exposed to subconcussive hits. Considering
the lack of sideline tools to identify potentially dangerous subconcussive hits, coming up with
objective measures to evaluate acute neurologic impairments associated with head impacts in
contact sports is crucial from a clinical standpoint. The current project aimed to investigate the
association between head impact exposure (HIE) during a varsity football game and short-term
changes in cortical excitability of the primary motor cortex (M1) using transcranial magnetic
stimulation (TMS). To this end, we conducted a study, in which twenty-nine university-level male
athletes wore instrumented mouthguards (iMGs) during a football game to measure HIE. TMS
measurements were conducted 24 hours before and 1-2 hours after the game. Additionally, twenty
control football athletes submitted to a non-contact physical training session and underwent
identical TMS assessments. Results suggest that relative to controls, the group of athletes who had
played a full contact football game exhibited a significant intracortical disinhibition (p=.028) on
short-interval intracortical inhibition (SICI 3-ms) within hours following the game. Moreover,
football players exposed to more 40g+ hits and greater cumulative forces from 40g+ head impacts
exhibited greater post-game SICI disinhibition. Given the deleterious effects of decreased
inhibition on motor control and balance, systematically tracking head impact forces throughout the
course of contact sport season could reveal essential for sideline clinical management of head
injury risk. These observed changes add to the concern that more research into the lasting
consequences of HIE is needed.
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