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ABSTRACTThis paper draws upon learning from three action research projects conducted as part of a Europe-wide project exploring young people’s social and political participation. Challenging dominant discourses about what ‘counts’ as participation and what does not, the paper explores how, through the action research projects, young people engaged in knowledge democracy in ‘new democratic arenas’. Building upon experiential knowing and creating knowledge and learning through practice, the young people explored their own democratic knowledge production, communication and engagement within a context of shifting discourses of participation, democratic engagement and active citizenship. The increasing preference of young people for more informal forms of participation as lived practice reflects a shift to young people constructing their own modes of participation and ‘remaking democracy’ in their own vision and according to their own needs. By working outside of the confines of normative assumptions of democratic practice and participation, young people exercised their own ‘political’ agency in response to their own priorities, interests and concerns and, in doing so, illustrated that new forms, understandings and practices of knowledge democracy can emerge that reflect the promise of inclusive democratic societies more meaningfully. 相似文献
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Sanders R Gibson B Prassas S 《Sports biomechanics / International Society of Biomechanics in Sports》2002,1(2):193-212
The purpose of this study was to compare the reverse two and one half somersault dive in a tuck position (305C) performed by females (n = 24), and the reverse two and one half somersault dive in a pike position (305B) performed by males (n = 21), to determine changes required by females to successfully perform 305B. Key performance variables in reverse dives were also compared to those of forward dives. Video data of the dives performed at the 1999 FINA World Diving Cup were captured and digitised to obtain times and postures of the divers at specific events including hurdle landing, takeoff, and entry. Estimates of hurdle flight height and mass-normalised work done on the springboard were obtained from hurdle and flight times. The males did more work on the springboard to achieve greater height and rotation than females. Females performing 305C had less hip and knee flexion at hurdle landing than males performing 305B and took longer to achieve maximum hip flexion after takeoff from the springboard. To progress from 305C to 305B females need to adjust their techniques to put more energy into the system. Desirable changes include increased height in the hurdle and increased hip and knee flexion prior to hurdle landing. Comparison of results for reverse dives with data previously presented for forward dives indicated that divers are more limited in the number of somersaults and dive position in reverse dives than forward dives despite equivalent or better height in reverse dives than forward dives. 相似文献
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Marcus P. Hannon Daniel J. Carney Stephen Floyd Lloyd J. F. Parker John McKeown Barry Drust 《Journal of sports sciences》2020,38(11-12):1326-1334
ABSTRACT For the first time we aimed to: (1) assess fat-free mass (FFM) and RMR in youth soccer players, (2) compare measured RMR to estimated RMR using previously published prediction equations, and (3) develop a novel population-specific prediction equation. In a cross-sectional design, 99 males from a Premier League academy underwent assessments of body composition (DXA) and RMR (indirect-calorimetry). Measured RMR was compared to estimated values from five prediction equations. A novel RMR prediction equation was developed using stepwise multiple regression. FFM increased (P<0.05) between U12 (31.6±4.2 kg) and U16 (56.3±5.3 kg) after which no further increases occurred (P>0.05). RMR in the U12s (1655±195 kcal.day?1), U13s (1720±205 kcal.day?1) and U14s (1846±218kcal.day?1) was significantly lower than the U15s (1957±128 kcal.day?1), U16s (2042±155 kcal.day?1), U18s (1875±180 kcal.day?1) and U23s (1941±197 kcal.day?1) squads (P>0.05). FFM was the single best predictor of RMR (r2=0.43; P<0.01) and was subsequently included in the novel prediction equation: RMR (kcal.day?1) = 1315 + (11.1 x FFM in kg). Both FFM and RMR increase from 12-16 years old, thus highlighting the requirement to adjust daily energy intake to support growth and maturation. The novel prediction RMR equation developed may help to inform daily energy requirements. 相似文献
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Catherine A. Masden Olivia N. Leung Barry H. Schneider Stephen J. Udvari 《High Ability Studies》2015,26(1):3-38
This research examined links among academic ability, social-perspective coordination, and friendship quality, within the context of gifted adolescents’ friendships. The sample consisted of 120 early adolescents (59 girls, 61 boys), 81 of whom were identified as gifted. Academic ability, sex, and grade significantly predicted social-perspective coordination (an indicator of psychosocial maturity) in multiple regression analyses. Social-perspective coordination, perceptions (self-concept) of ability to make and keep friends, academic ability, sex, and grade predicted perceptions of the overall quality of friendships. Being a female, seventh grader, or adolescent not identified as gifted, significantly predicted higher friendship quality. Social-perspective coordination and self-concept based on having a close friend predicted higher levels of friendship quality for the gifted participants. 相似文献