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Teixeira LA de Oliveira DL Romano RG Correa SC 《Research quarterly for exercise and sport》2011,82(1):21-27
To examine the effect of long lasting practice on pedal behavior in sport, we compared experienced adult soccer players and nonsoccer players on leg preference in motor tasks requiring general mobilization, soccer related mobilization, and body balance stabilization. We also evaluated performance asymmetry between the right and left legs in static and dynamic unipedal body balance, based on center of pressure displacement, and correlated that with leg preference in balance stabilization tasks. Results revealed (a) a distinct leg preference between mobilization and stabilization tasks, which were significantly different between players and nonplayers, (b) similar balance stability between the right and left legs, (c) greater stability of experienced players compared with nonplayers in static and dynamic balance, and (d) absence of a significant leg preference correlation with interlateral balance asymmetry. These results suggest an effect of extensive soccer skill practice on establishing leg preference for specific mobilization tasks and overall balance control. 相似文献
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Geri Augusto 《International Information and Library Review》2013,45(4):211-218
In contemporary African societies where multiple systems of knowledge coexist, and the use of informatics is becoming increasingly widespread, conventional perspectives drawn from cultural anthropology, environmentalism, development studies and intellectual property rights are insufficient guides to thinking about the digitization of indigenous knowledge. Taking an interdisciplinary approach, three moments in South African knowledge dynamics are used to probe some of the ontological, epistemological, and performative implications of science/IKS interaction in the design and construction of archives and databases of local plants. Twenty-first century databases of indigenous African medico-botanical knowledge need to assure that it is recontextualized historically and socially; that its multiplicity, visuality, and orality are retained; and that “articulation work” is done to make sure that design choices and use are cognitively just. 相似文献
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Luís Lopes Jorge Augusto Pinto Silva Mota Carla Moreira Sandra Abreu Cesar Agostinis Sobrinho José Oliveira-Santos 《Journal of sports sciences》2019,37(3):285-290
An appropriated level of motor competence is essential for children´s healthy growth and development and a key factor in the promotion of lifelong active lifestyles and health.
The purpose of this study was to examine associations between motor competence and different physical activity intensities (light, moderate, moderate-to-vigorous and vigorous physical activity), as well as total physical activity, over a two-year period, in adolescents. The sample comprised of 103 adolescents (13.49 ± 0.87 years, 53 girls), from the north of Portugal. Motor competence was evaluated with the body coordination test, Körperkoordination-Test-für-Kinder. Physical activity was objectively assessed with GT1M accelerometers (ActiGraph, Pensacola, FL, USA). Physical activity variables were expressed as proportions of accelerometer wear time. Regression analyses showed positive longitudinal associations between motor competence at baseline and moderate physical activity (B = 0.0033, p = 0.018), moderate-to-vigorous physical activity (B = 0.0052, p = 0.024) and total physical activity (B = 0.067, p = 0.040) at follow up, after adjustments for age, sex, the corresponding physical activity intensity at baseline, body mass index, pubertal stage and socioeconomic status. Our ?ndings highlight the importance of motor competence development to promote moderate-to-vigorous physical activity during adolescence. 相似文献
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Nikola Paranosic Augusto Riveros 《International Journal of Leadership in Education》2017,20(4):432-450
This paper reports the results of a study that examined the ways a group of department heads in Ontario, Canada, describe their role. Despite their ubiquity and importance, department heads have been seldom investigated in the educational leadership literature. The study uses the metaphor as an analytic tool to examine the ways participants talked about their role. It was found that while department heads seem essential to the policy implementation, their role is rarely acknowledged. In the analysis, we use the term ‘Fifth Business’, originally coined by Robertson Davies, to refer to the actors in a play who were never assigned the role of heroes or villains, but whose work was to incarnate a role that was nonetheless essential to the play. The study concludes that by building on the complex ways department heads understand their role, school leaders and policy-makers could clarify their role and develop strategies to support them. 相似文献
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AbstractIn this article, we argue for a study of educational administration centered on an ontology of practices. This is an initial proposal for thinking about and conceptualizing practices in educational administration. To do this, first, we explore how practices are constituted and how they configure the social realities of practitioners. Second, we explore what an ontology of practices has to offer for our understanding of organizations. Third, we examine how an ontology of practices might inform our understandings of leadership in educational organizations, and we conclude by exploring some implications of an ontology of practices for the study of educational administration. 相似文献
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Thiago Telles Renato Barroso Augusto Carvalho Barbosa Diego Fortes de Souza Salgueiro Emilson Colantonio Orival Andries Júnior 《Journal of sports sciences》2015,33(10):1084-1092
This study investigated the effects of hand paddles, parachute and hand paddles plus parachute on the inter-limb coordination of butterfly swimming. Thirteen male swimmers were evaluated in four random maximal intensity conditions: without equipment, with hand paddles, with parachute and with hand paddles + parachute. Arm and leg stroke phases were identified by 2D video analysis to calculate the total time gap (T1: time between hands’ entry in the water and high break-even point of the first undulation; T2: time between the beginning of the hand’s backward movement and low break-even point of the first undulation; T3: time between the hand’s arrival in a vertical plane to the shoulders and high break-even point of the second undulation; T4: time between the hand’s release from the water and low break-even point of the second undulation). The swimming velocity was reduced and T1, T2 and T3 increased in parachute and hand paddles + parachute. No changes were observed in T4. Total time gap decreased in parachute and hand paddles + parachute. It is concluded that hand paddles do not influence the arm-to-leg coordination in butterfly, while parachute and hand paddles + parachute do change it, providing a greater propulsive continuity. 相似文献
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Marcos Augusto Francisco Borges & M. Cecília C. Baranauskas 《British journal of educational technology : journal of the Council for Educational Technology》1998,29(1):25-34
This paper reports the objectives, design approach and first results of a research project that aims to develop an intelligent computer-based learning environment for industrial applications. Jonas , an expert system, is part of a modelling/simulation environment which enables shopfloor workers to test and to put new philosophies of work into practice in the context of manufacture. Our approach is focused on three main ideas: the Intelligence Augmentation paradigm, user-centred system design and the constructionist theory of learning. The architecture of the modelling environment and the main features of Jonas are presented as an illustration of the design ideas discussed in the paper. 相似文献