Relevant bibliographies by topics / Play Ball

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Play Ball'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Play Ball"

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Ruiz-del-Solar, J., R. Verschae, M. Arenas, and P. Loncomilla. "Play Ball!" IEEE Robotics & Automation Magazine 17, no. 4 (December 2010): 43–53. http://dx.doi.org/10.1109/mra.2010.938840.

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SHADE, D. "Play ball." Journal of Pediatric Oncology Nursing 13, no. 2 (April 1996): 104. http://dx.doi.org/10.1016/s1043-4542(96)90066-1.

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Pollack, H. "Play ball!" Science 268, no. 5218 (June 23, 1995): 1681–85. http://dx.doi.org/10.1126/science.7792583.

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Adair, R. "Play ball!" Science 268, no. 5218 (June 23, 1995): 1681–82. http://dx.doi.org/10.1126/science.7792584.

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Chodosh, L., L. Lifson, and C. Tabin. "Play ball!" Science 268, no. 5218 (June 23, 1995): 1682–83. http://dx.doi.org/10.1126/science.7792585.

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Reider, Bruce. "Play Ball!" American Journal of Sports Medicine 43, no. 5 (April 30, 2015): 1041–44. http://dx.doi.org/10.1177/0363546515584145.

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Laput, Gierad. "Play ball." XRDS: Crossroads, The ACM Magazine for Students 25, no. 4 (July 9, 2019): 5–7. http://dx.doi.org/10.1145/3339882.

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Wojtys, Edward M. "Play Ball!" Sports Health: A Multidisciplinary Approach 10, no. 2 (February 23, 2018): 108–9. http://dx.doi.org/10.1177/1941738118756280.

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Shade, Debra R. "Play Ball." Journal of Pediatric Oncology Nursing 13, no. 2 (January 1996): 104. http://dx.doi.org/10.1177/104345429601300211.

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Jacobs, R. A. "Play Ball!" Science 268, no. 5218 (June 23, 1995): 1683. http://dx.doi.org/10.1126/science.268.5218.1683.

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Dissertations / Theses on the topic "Play Ball"

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Bergström, Liisa. ""Play ball!" : A Study of Speech Variations and Characteristics of UK Sports Commentary." Thesis, Högskolan i Halmstad, Akademin för lärande, humaniora och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-43153.

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This study uncovers how and to what extent UK sports commentaries vary in terms of speech variations and other sociolinguistic factors, such as social class and gender, in relation to the social status with which different sports are associated. It also analyses how the use of jargon, slang, colloquial forms of English, and other linguistic features are incorporated in the commentaries of the sports and how it affects the information expressed by the commentators. In order to do this, theories and scholarly work on variations in speech, phonological and sociolinguistic features will be applied to examples of recorded commentaries made during matches in five popular televised sports, namely football, cricket, rugby union, netball, and tennis. The primary data will consist of two-minute transcriptions made from matches from each sport. The study finds that there are speech variations in the commentators’ ways and that they relate, to some extent, to the social class associated with the sport which the commentators are commenting on. The variations also depend on the commentator’s role in the broadcast, whether or not they feature as the general commentator or as an expert in the particular sport. It also reveals how commentators rely on the use of jargon, slang and, colloquialisms to make the communication to the spectators/listeners efficient and entertaining.
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Pearson, Angela J. "The ethos of sporting games : fair play and elite women's cricket." Thesis, University of Gloucestershire, 2000. http://eprints.glos.ac.uk/3018/.

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The recent intellectual movement away from universalism towards particularism can be witnessed in most divisions of social philosophical thought. Such a paradigmatic shift has radically transformed a number of theories including feminist ethics. In contrast, however, philosophical analyses of fairness in sport have retained allegiance to universalist accounts in that conceptions of fair play remain enshrined in formalist accounts of the nature of rules and laws that govern sporting games. In this thesis, it is argued that universalist accounts of fair play in sport are incomplete in so far as they fail to consider that what constitutes fairness in sport is more than just the interpretation of formal rule structures. The richer analysis of fair play in sport offered here highlights the importance of individual experiences and the structures that shape those experiences. The ethical investigation is compatible with certain feminist ethical commitments. In order to evaluate whether a given sporting ethos is ethical, the thesis is committed methodologically to a mixed model approach. The aim is to find out the beliefs, values and ideologies of the people involved. Hence, a context-respectful methodology collecting and utilising thick descriptions is employed. It is argued that an ethical ethos has no room for intentional rule violation. For a given ethos to be ethical its game must be practised in a certain way with a certain attitude. The evaluation in this thesis concludes that the ethos of English elite women's cricket is unethical. It is hoped that a potential outcome of the thesis will be a different understanding of fair play that may shape new forms of ethical enquiry and challenge existing methodologies. Argument: (1) In sport philosophical literature fair play has been characteristically understood in one way: the formalist account of the nature of rules and laws. (2) While it is true that one can not talk about fair play without reference to the rules and laws of an activity, this account is incomplete since it fails to consider ethos. (3) Part of what an ethos means derives from the beliefs, values and ideologies of players themselves who have constructed agreements as to how the game ought to be enacted. (4) To understand fair play in elite women's cricket, therefore, one must understand the rules and laws but also, crucially, its ethos.
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Pappo, Harry A. "Simulation of the visuo-motor processes in the tracking and interception of a tennis ball in play." Thesis, Rhodes University, 1985. http://hdl.handle.net/10962/d1001431.

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In sports, one might wish to test new ideas regarding player movement, tactics, or strategy without subjecting the athletes to possibly wasteful or even harmful habit formations. If a method of simulation of the athlete can be devised, experiments might reasonably be conducted to evaluate the ideas independently of actual training or trial in the field. Simulation of a complex system generally begins with a long period of analysis. During this time there may be mathematical and programming explorations and constructions to sharpen and examine different approaches. Meetings are usually held by the participants to try to define the task and explore alternatives. Ideas are amplified, possibly discarded as not feasible, or incorporated into the system package. Gradually there evolves a tighter and more acceptable formulation using logical and mathematical expressions (Preface, p. vii)
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Sexton, Jonathan Merle. "Why can't we just play ball? An exploration of how collegiate female athletes experience traditional gender norm expectations." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/3187.

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The purpose of this dissertation study was to explore how traditional gender norms influence the daily experiences of female student-athletes. The following research question framed this study: How do collegiate female basketball players experience traditional gender norm expectations in relation to their sport? A combination of sources focused on gender norms and athletics informed this study, including previous research, mass media publications and documentaries, and the researcher's individual experiences with gender norms in organized athletics. To explore the research question, six National Collegiate Athletic Association (NCAA) Division I (D-I) female basketball players were interviewed to provide phenomenological data focused on their individual experiences with gender norms in college basketball. Semi-structured interviews utilizing a feminist phenomenological qualitative design were completed via Skype™. A phenomenological approach was employed to focus on the meaning of events experienced by people in specific situations. The feminist lens ensured that the study framed gender as a fluid concept consisting of multiple intersections. The six participants in the study represented five different teams from a major NCAA conference. Almost all of the participants in the study attended a different major research university in the Midwest (two participants attended the same institution). Three major themes surfaced from data provided by participants. These themes include: (1) the challenge of meeting traditional gender expectations (2) contrasting gender expectations in athletic and non-athletic settings (3) the changing dynamic of gender perceptions in women's basketball. These themes focus on participants' experience of contrasting gender expectations in different settings. In athletic settings participants described rarely thinking about gender dynamics or expectations. Off the court, however, players described a stronger perception of expectations for how they should look and behave. Players described experiencing regular questions and assumptions about their gender identity (i.e. female, male, trans*) and / or sexual orientation (i.e. bisexual, gay, heterosexual, queer) when wearing loose fitting basketball sweats during the day. While players rarely thought about conforming to a gender identity or role on the court, they did describe frustrations with an imbalance of media coverage between men's and women's athletics. Based on the findings of this study, recommendations for higher education practice include (1) providing training and educational opportunities for student-athletes, coaches, and administrators focused on gender socialization and subsequent perceptions of student-athletes (2) developing mentoring programs pairing new recruits with veteran players to help acclimate new student-athletes to the demands of the NCAA season, and to explore the impact of traditional gender norm expectations on student-athletes and (3) developing mass media or social media campaigns to help encourage positive recruiting practices in women's basketball and to discourage recruiters focusing on the gender identity or sexual orientation of players and coaches on other teams as a means of lowering interest in those programs.
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Degrenne, Olivier. "Caractérisation des évolutions de jeu en volley-ball de haut-niveau : Étude comparative de trois compétitions internationales." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC0067.

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L’analyse de la performance est un courant scientifique qui vise à identifier les facteurs qui mènent à la performance. L’analyse du jeu se fonde essentiellement sur l’observation d’indices qui ont vocation à expliquer la performance au cours d’un échange, d’un match ou d’une compétition. De notre point de vue, l’observation de la prestation d’une équipe ne saurait se faire sans prendre en considération celle de son adversaire. Dans le cadre de notre recherche, nous cherchons à observer la performance collective au regard de la gestion du rapport d’opposition. Dans cette logique, nous nous appuyons sur deux concepts centraux :- La répartition des états de rapport d’opposition- Les éléments du rapport de forceNotre travail a plusieurs objectifs. Le principal vise à discriminer une évolution du jeu au cours de trois compétitions internationales en observant la gestion des différents rapports d’opposition en suivant le modèle définis par Langlois (2018). D’un point de vue secondaire, nous tenterons de caractériser des styles de jeu propres aux différentes nations qui composent le Top 8 mondial lors de chaque compétition.Nous avons fait le choix d’observer trois compétitions internationales masculines regroupant les meilleures nations mondiales avec un intervalle de deux ans entre chaque afin de pouvoir identifier des évolutions entre les compétitions. Ainsi nous observons les championnats du Monde 2014 et 2018 ainsi que les Jeux Olympiques 2016. Afin d’identifier des différences entre les compétitions et entre les équipes, nous utilisons le test de Khi2 et nous observons les résidus ajustés afin d’identifier des différences notables.Nos résultats révèlent des évolutions notables du jeu dans les éléments de rapport de force mobilisés pour faire basculer le rapport d’opposition, bien que la répartition des états de rapport d’opposition n’évolue pas. Par ailleurs, nous démontrons des différences notables dans les moyens d’actions utilisés par les différentes équipes
Performance analysis is a topic which aims to identify factors of sports performance. Game analysis is based on observation of indicators which can explain performance during a specific point either in, a game, match, or competition. From our point of view, the observation of a team's performance shouldn’t be done without the observations of the performance of the opponents. In this research, we attempt to observe the performance through the opposition rapport. In this way, we build our work on two main concepts, (1) the opposition rapport, and (2) rapport of strength’s elementsThe primary aim was to discriminate the evolution during three competitions at the highest level by the observation of the opposition rapport following the model developed by Langlois (2018). The secondary aim was to characterize the style of play of the nations who compose the Top 8 of each competition.We chose to observe three men’s international competitions with two years between each competition to identify evolution between competitions. We will analyse the World Championship of 2014 and 2018 and the Olympic Games of 2016. To identify differences between competitions and teams, we used a chi-square test, with analysis of the adjusted residual.Our results show evolution in rapport of strength’s elements used despite no evolution in the opposition rapport. The results also demonstrate differences between teams in rapport of strength’s elements used
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Rahal, Sidi Ahmed. "Approche système expert pour une stratégie de jeu dans le sport : Application au basket-ball." Pau, 1989. http://www.theses.fr/1989PAUU3001.

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Kain, Jitin. "City of Muncie and Ball State University integration plan." Virtual Press, 2002. http://liblink.bsu.edu/uhtbin/catkey/1237762.

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In the late 1800s and early 1900s, Muncie's city center was the core of urban life. It was similar to many industrial cities of the late 1800s, where the central business district was the hub of activities. The urban fabric in Muncie has changed significantly over the years, making it a city with very little activity in the city center. Downtown revitalization has therefore been an important task for civic leaders in the city. There are various revitalization strategies that aid in city center revival. Some have been classified as incremental, while some as catalysts. The first approach seeks to revitalize a city center using programs that show results over a period of time. The second approach depends on the successful development of a large project like a shopping mall, convention center or a hotel that brings back life in the city center. The goal of this study is to prove the effectiveness of colleges and universities as catalysts in downtown revitalization. Researched material suggests that various communities across the United States are harnessing the resources and forming partnerships with their host universities in order to aid in downtown revitalization efforts. Traditionally, universities and colleges in the United States developed away from the city center, but physically shifting downtown has proven effective in reviving the deteriorating condition of economically deprived communities. The proposed Integration Plan is aimed at guiding as well as providing ideas to further enhance the downtown revitalization process in the City of Muncie.
Department of Urban Planning
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Yu, Andrew Seohwan. "NBA ON-BALL SCREENS: AUTOMATIC IDENTIFICATION AND ANALYSIS OF BASKETBALL PLAYS." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu14943636475232.

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Sandling, Erik. "Crafty Conversations : Om konsthantverk, konversationer och det som händer där emellan." Thesis, Konstfack, Textil, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7243.

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Roche, Benjamin. "Les décisions du passeur de haut niveau en volley-ball sur side out : quatre études de cas." Phd thesis, Université Rennes 2, 2011. http://tel.archives-ouvertes.fr/tel-00609934.

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En accord avec Eloi (2009), tous les spécialistes s'accordent à reconnaître le rôle prépondérant du passeur dans la performance d'une équipe de volley-ball. Il n'existe paradoxalement, que peu de travaux disponibles sur ce thème. Cette thèse a pour objet l'élaboration d'une modélisation de son activité décisionnelle au haut niveau, en situation de match. L'enjeu est de caractériser la complexité des décisions tactiques, en soulignant les relations dynamiques entre les aspects circonstanciés et les sources d'influence plus générales. En adaptant la modélisation de Mouchet (2003), nous opérons une friction de plusieurs paradigmes scientifiques qui proposent différents modèles explicatifs de la cognition, apportant un éclairage particulier sur les conduites décisionnelles. Notre posture épistémologique consiste à appréhender la complexité (Morin, Le Moigne, 1999 ; Le Moigne, 1999) par une approche systémique, en investiguant les conduites décisionnelles en situation écologique et en prenant en compte le point de vue du sujet. Nous faisons l'hypothèse que le système d'influence, constitué de la culture, de l'environnement momentané et de l'expérience de la personne, imprègne l'activité décisionnelle, en étant compacté dans l'action en cours. Chaque joueur construit son propre monde en intégrant les différents niveaux selon une logique singulière. Notre étude porte sur quatre études de cas de passeurs français internationaux. Pour recueillir des données de la " partie cachée " (Gouju, 2001), nous avons mis en place une méthodologie constituée d'une observation armée, d'un entretien semi directif, d'une simulation, et de rétroactions vidéo (principe de triangulation).
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Books on the topic "Play Ball"

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Play ball! Washington, DC: TeachingStrategies, 2010.

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Play ball! New York: Atheneum Books for Young Readers, 1999.

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Christina, Weir, and Lewis, Jackie (Jackie Acki), ill, eds. Play ball. Portland, OR: Oni Press, 2012.

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Play ball! New York: Aladdin Paberbacks, 1999.

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Dravecky, Dave. Play ball. Nashvillem Tenn: J. Countryman, 2001.

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Posada, Jorge. Play ball! New York: Simon & Schuster Books for Young Readers, 2006.

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Gnagey, Larry. Play ball! [Mahomet, Ill.]: Early American Museum, 1996.

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Christopher, Matt. Play ball! New York: Scholastic, 2013.

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Sacks, Marcy Goldberg. Play ball! Boston: Houghton Mifflin Harcourt, 2009.

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Jordan, Apple. Play ball! New York: Golden Book, 2000.

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Book chapters on the topic "Play Ball"

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Jaeger, Manfred, Peter Gjøl Jensen, Kim Guldstrand Larsen, Axel Legay, Sean Sedwards, and Jakob Haahr Taankvist. "Teaching Stratego to Play Ball: Optimal Synthesis for Continuous Space MDPs." In Automated Technology for Verification and Analysis, 81–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31784-3_5.

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Singh, Surya P. N., Paul E. I. Pounds, and Hanna Kurniawati. "I-Ball: A Programmable Sporting Aid for Children with a Visual Impairment to Play Soccer." In Universal Access in Human-Computer Interaction. Design Methods, Tools, and Interaction Techniques for eInclusion, 584–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39188-0_63.

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Hanan, Himasari. "Stay, Play, and Learn at Bali Aga Traditional Village." In Proceedings of the 6th International Conference of Arte-Polis, 139–48. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5481-5_14.

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Cremona, Vicki Ann. "Fancy Dress, Rank and Dignity: Power and Play in Carnival Balls." In Carnival and Power, 99–142. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70656-6_4.

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Koch, Erwin. "Balz nach Plan (anläßlich des 3. Kongresses für Humanethologie und empirische Soziobiologie in Wuppertal)." In Wissenschaft als Satire, 166–80. Wiesbaden: VS Verlag für Sozialwissenschaften, 1998. http://dx.doi.org/10.1007/978-3-322-83332-7_13.

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"Ball." In The Art of Play, 71–87. Temple University Press, 2013. http://dx.doi.org/10.2307/j.ctvrf88kv.9.

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LIBERTI, RITA. "Play/Gay Ball!" In Seattle Sports, 69–86. University of Arkansas Press, 2020. http://dx.doi.org/10.2307/j.ctv12sdxcz.8.

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"5. Picaresque Love Games in Match Ball." In Play and the Picaresque. Toronto: University of Toronto Press, 1999. http://dx.doi.org/10.3138/9781442678521-007.

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Peterson, Robert. "Jim Crow Scores on the Squeeze Play." In Only the Ball Was White, 40–51. Oxford University Press, 1992. http://dx.doi.org/10.1093/acprof:oso/9780195076370.003.0019.

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Rutter, Emily Ruth. "“Let’s Play Two”: The Affective Resonances of Black Baseball in African American Poetry." In Invisible Ball of Dreams, 93–108. University Press of Mississippi, 2018. http://dx.doi.org/10.14325/mississippi/9781496817129.003.0007.

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As with August Wilson and Gloria Naylor (chapter 3), chapter 4’s poets—Yusef Komunyakaa, Michael S. Harper, Quincy Troupe, and Harmony Holiday—view black baseball as a vehicle for exposing racial degradation on the one hand and maintaining collective pride on the other. While they hold distinct vantage points and Holiday is of a younger, post-Civil Rights generation, these poets are all invested in shedding light on the paradoxical emotions educed by the memory of black baseball, illuminating what it felt like to be systematically excluded from the national pastime and, ultimately, mainstream civic life. In the process, Komunyakaa, Harper, Troupe, and Holiday continue to mine and enrich an “archive of feelings,” which includes the resonances and ephemera that are not housed within museums or captured in statistical records but are nonetheless vital resources for reconstructing the interior lives of marginalized people.
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Conference papers on the topic "Play Ball"

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Akiyama, Takumi, Kentaro Go, Akifumi Kijima, and Yuichiro Kinoshita. "Characterizing the Coordinating Behaviors in a Three vs. One Ball Possession Game using Gaze Interaction." In CHI PLAY '20: The Annual Symposium on Computer-Human Interaction in Play. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3383668.3419867.

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Bujarbaruah, Monimoy, Tony Zheng, Akhil Shetty, Martin Sehr, and Francesco Borrelli. "Learning to Play Cup-and-Ball with Noisy Camera Observations." In 2020 IEEE 16th International Conference on Automation Science and Engineering (CASE). IEEE, 2020. http://dx.doi.org/10.1109/case48305.2020.9216806.

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Kodama, Sachiko, Shuzo Matsuno, Ryutaro Ogawa, Kenji Inokuchi, Toshiki Sato, Takahiro Shida, Yasuki Takeno, and Eitetsu Komiyama. "A practical ball sports platform combining dynamic body action with real-time computer graphics during ball play." In SA'15: SIGGRAPH Asia 2015. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2818466.2818497.

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Osato, Kazufumi, Tatsuhiro Yonekura, Yoshihiro Kawano, and Dai Hanawa. "On an Analysis of Pass Play in a Virtual Ball Game." In 2007 International Conference on Cyberworlds (CW'07). IEEE, 2007. http://dx.doi.org/10.1109/cw.2007.46.

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Antao, Liliana, Armando Sousa, Luis Paulo Reis, and Gil Goncalves. "Learning to Play Precision Ball Sports from scratch: a Deep Reinforcement Learning Approach." In 2020 International Joint Conference on Neural Networks (IJCNN). IEEE, 2020. http://dx.doi.org/10.1109/ijcnn48605.2020.9207518.

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Schlosser, D. J., M. Johe, T. Humphreys, C. Lundberg, and J. L. McNichol. "Evolution of Completion Techniques in the Lower Shaunavon Tight Oil Play in Southwestern Saskatchewan." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173368-ms.

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Abstract The Oil and Gas industry has explored and developed the Lower Shaunavon formation through vertical drilling and completion technology. In 2006, previously uneconomic oil reserves in the Lower Shaunavon were unlocked through horizontal drilling and completions technologies. This success is similar to the developments seen in many other formations within the Williston Basin and Western Canadian Sedimentary Basin including Crescent Point Energy's Viewfield Bakken play in southeast Saskatchewan. In the Lower Shaunavon play, the horizontal multistage completion era began in 2006, with horizontal divisions of four to six completion stages per well that utilized ball-drop sleeves and open-hole packers. By 2010, the stage count capabilities of ball-drop systems had increased and liners with nine to 16 stages per well were being run. With an acquisition in 2009, Crescent Point Energy began operating in the Lower Shaunavon area. The acquisition was part of the company's strategy to acquire large oil-in-place resource plays. Recognizing the importance that technology brings to these plays, Crescent Point Energy has continuously developed and implemented new technology. In 2009, realizing the success of coiled tubing fractured cemented liners in the southeast Saskatchewan Viewfield Bakken play, Crescent Point Energy trialed their first cemented liners in the Lower Shaunavon formation. At the same time, technology progressed with advancements in completion strategies that were focused on fracture fluids, fracture stages, tool development, pump rates, hydraulic horsepower, environmental impact, water management, and production. In 2013, another step change in technology saw the implementation of coiled tubing activated fracture sleeves in cemented liner completions. Based on field trials and well results in Q4 2013, Crescent Point Energy committed to a full cemented liner program in the Lower Shaunavon. This paper presents the evolution of Crescent Point Energy's Lower Shaunavon resource play of southwest Saskatchewan. The benefits of current completion techniques are: reductions in water use, increased production, competitive well costs, and retained wellbore functionality for potential re-fracture and waterflooding programs.
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Honarmandi, Peyman, Alessandra Palmisano, Iryna Stashuk, and Shawn Ladda. "Study of Head Concussions on Female Soccer Players." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88347.

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The goal of this research is to evaluate the extent of damage to the brain in regard to concussions when female soccer players head the ball to pass, defend, and score goals. It is reported that female soccer players have higher concussion rates than male players, which is why they will be the focus of this study. The anatomy of the female body seems to be structured in a way that increases the risk of concussions, but that has not been verified yet. While many clinical studies document post-concussion results, our research evaluates the impact of the soccer ball during active play both computationally and experimentally. The force from the ball hitting the head and the resulting acceleration of the brain are analyzed. First, the head accelerations and corresponding HIC (Head Injury Criterion) values are obtained using computational programming. Then, a newly developed experimental framework is used to track the head acceleration using an accelerometer. The velocity and angle at which the ball makes contact with the head are measured using a projectile motion and time-lapse imaging technique. The results of heading the ball in different kick scenarios are compared with the threshold HIC values for concussions.
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Honarmandi, Peyman, Lisa Toscano, Michael Calicchia, Miguel Diaz, Emma Kaishian, and William Stallings. "A Study of Concussions in Women’s Lacrosse." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-12024.

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Abstract Concussions in athletes can be brought on by a hit to the head or sudden change in direction of the neck or head. This causes the brain to oscillate in the cranium hitting against the skull. Two common scenarios that result in a concussion in women’s lacrosse were studied: lacrosse ball to head contact and stick to head contact. Current Manhattan College student athletes on the Women’s Lacrosse team were used to obtain data regarding the average velocity of the ball, stick, and players. A pitching machine was utilized to accurately control the velocity of the ball when striking the dummy’s head to obtain the time of impact. The first step of this research is computational, as the collision scenarios were modeled and analyzed from a mechanical point of view. A linear acceleration value was obtained for a wide range of potential impact scenarios between the ball and player. When a linear acceleration greater than 50g is sustained, a concussion is likely to occur. The maximum linear acceleration calculated in this research was roughly 75.46g for ball to head contact and 62.3g for stick to head contact. Therefore, it was concluded that there is a high risk that a player will suffer a concussion in these scenarios. The results highlight the dangers in a gameplay setting, which indicates a potential need for alteration to game play style or regulations.
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Srinidhi, S., Mayank Tiwari, Rajni Burra, Hombe Gowda, and Paul A. Siemers. "Bearing Wear Due to Mechanical Stresses and Electrical Currents." In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15255.

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Passage of current through moving conductive contacts results in electrical discharge and then melting of the material, which leads to wear. Such kind of bearing wear is common in electrical machines. There are however certain patterns which are unique to this kind wear. This wear pattern is called ‘fluting’, which are repetitive in nature. Electrical discharge can create higher surface roughness. Also the thermal and rheological properties of the lubricant play a big role in the film thickness formation. The passage of current through the lubricant also changes this and is determined by the electrical properties of the lubricant. In this work effect of bearing currents on a 7204 angular contact ball bearing is studied. This is tested with and without different cage materials with an axial load and no radial load, rotating at 2700 rpm. Four experiments were done at different-level of voltage, lube and cage material. Type of lubricant was seen to play a significant role in fluting.
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Marques, Filipe, Fernando Isaac, Nuno Dourado, António Pedro Souto, Paulo Flores, and Hamid M. Lankarani. "A Study on the Dynamics of Spatial Mechanisms With Frictional Spherical Clearance Joints." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59089.

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An investigation on the dynamic modeling and analysis of spatial mechanisms with spherical clearance joints including friction is presented. For this purpose, the ball and the socket which compose a spherical joint are modeled as two individual colliding components. The normal contact-impact forces that develop at the spherical clearance joint are determined by using a continuous force model. A continuous analysis approach is used here with a Hertzian based contact force model, which includes a dissipative term representing the energy dissipation during the contact process. The pseudo-penetration that occurs between the potential contact points of the ball and the socket surface, as well as the indentation rate play a crucial role in the evaluation of the normal contact forces. In addition, several different friction force models based on the Coulomb’s law are revisited in this work. The friction models utilized here can accommodate the various friction regimens and phenomena that take place at the contact interface between the ball and the socket. Both the normal and tangential contact forces are evaluated and included into the systems’ dynamics equation of motion, developed under the framework of multibody systems formulations. A spatial four bar mechanism, which includes a spherical joint with clearance, is used as an application example to examine and quantify the effects of various friction force models, clearance sizes, and the friction coefficients.
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Reports on the topic "Play Ball"

1

Spanner, G. E., and G. P. Sullivan. Impact evaluation of an adjustable speed drive installed at Ball-InCon Glass Packaging Corporation under the Energy $avings Plan. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10165593.

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