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Youth empowerment is the main goal of sex education according to Dutch Government and NGO policies. Academics from different disciplines have argued, however, that the ideal of empowerment through education is problematic, because of the unequal power relations implicated in educational practices. Building on one-and-a-half years of online and offline ethnographic fieldwork among Dutch youth, this article argues that Dutch sex educational policies inhibit rather than encourage young people’s empowerment by allowing only a limited number of sexual knowledge building practices to thrive while making others nearly impossible. In order to facilitate young people’s empowerment, policies should aim to create space for young people to develop their own themes and priorities, to offer a multitude of perspectives, to set the pace and to use different strategies for sexual knowledge building, including learning by doing and online learning. This requires a cultural shift that involves both an openness to young people’s experimentation, and a change in existing power hierarchies based on age.  相似文献   
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Three issues are put forward with respect to the active participation of young people in leisure-time sports styles. It is considered (a) whether sports participation styles can be detected over the last three decades, (b) whether they have changed in this period of time, and (c) whether traditional parameters understood as structuring and positioning young people's lifestyles are still relevant with respect to their sports participation preferences. Youth sports participation data were retrieved from four large-scale surveys in 1969, 1979, 1989 and 1999 (Ntotal=22,424 high school boys and girls). These data allow for a time trend analysis of youth sports participation styles. Results from component and regression analyses indicate that different participation styles can be distinguished for each period of time and that these styles have been developing and differentiating through a growing responsiveness to wider social trends. Structural and positioning variables such as age, sex and education remain significant determinants for young people's active participation in leisure-time sports styles over the observed period of time. Although these social structures continue to shape youth sports participation styles, it is suggested that there is more variety within social groups than among social groups partially due to processes of individualisation and homogenisation.  相似文献   
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ABSTRACT

The objective of this review was to systematically describe the traditional and contemporary data capture and analytic methods employed in performance analysis research in team invasion sports, evaluate the practicality of these methods, and formulate practical recommendations on methods for analysing tactics and strategies in team invasion sports. A systematic search of the databases SPORTDiscus, Web of Science, Scopus, MEDLINE and PubMed was performed. Keywords addressed performance analysis methods and team invasion sports, with all other disciplines of sports science excluded. A total of 537 articles were included in the review and six main themes of research identified. Themes included game actions, dynamic game actions, movement patterns, collective team behaviours, social network analysis and game styles. Performance analysis research has predominantly focused on identifying key performance indicators related to success by analysing differences in game actions between successful and less successful teams. However, these measures are outcome-focused and only provide limited insight into winning team’s strategy. Team invasion sports are now viewed as dynamic, complex systems with opposing teams as interacting parts. Strategies and tactics should be analysed using a holistic process-orientated approach by recording dynamic actions, collective team behaviours and passing networks, and viewing them in game styles.  相似文献   
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Since 1998, the Flanders’ educational government in Belgium has been urging teacher education institutions by decree to implement competences in teacher training programs. Since then, years have gone by, and institutions have acted in order to achieve the competence-based goals. However, have they succeeded in implementing them? This is the research question that is central to the current study. An online survey inquiry was set up in eight elementary teacher education institutions using two questionnaires; one for final year elementary institution pre-service teachers, who were about to graduate at the time of completing the questionnaire (N = 218), the other for teacher trainers throughout the elementary teacher training program (N = 51). Ten years after the decree was issued, results show that competence-based education has become a reality in terms of its implementation. However, the process has not yet come to an end. Whereas some competences are clearly present in the institutions’ policies and practices (e.g. teacher as guide to learning and development, teacher as subject expert), others are poorly represented (e.g. teacher as partner of parents, external parties and as a member of the educational community). Moreover, teacher trainers tend to take four different approaches to the implementation of competences (1) during internship, (2) through the institution’s policy and program planning, (3) by means of their integration in both theoretical and practical components of the curriculum and finally, (4) a lack of implementation because the competences are considered insufficiently applicable by the teacher trainers. In particular, more experienced and subject expert teacher trainers tend to adopt the final approach more often than do younger colleagues and pedagogues. Student teachers’ results, on the other hand, suggest important differences between institutions concerning their understanding of competences and the integration of these competences in the curriculum; suggesting different paces of adaptation between teacher education institutions. Moreover, even within schools, the trajectory towards implementation is not always clear for all members of the teaching team, nor for the students of most teacher education institutions. Consequently, there is still important work to be done in order for successful competence-based change to occur.  相似文献   
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ObjectiveTo examine the impact of a 6-week endurance training on red blood cell (RBC) aging and deformability of healthy participants to detect possible improved hemorheological and performance-related adaptations.MethodsA total of 31 participants (17 females and 14 males) performed a 6-week moderate training protocol (three 1-h running sessions per week at 70% of maximal heart rate). Blood was sampled before and after the training. RBCs from each participant were fractioned according to density and age into 4 RBC subfractions. Subfractions were examined for changes of RBC properties, including aging distribution, RBC deformability, RBC microparticles, and phosphatidylserine concentrations. RBC and plasma nitrite levels were measured as indicators of nitric oxide metabolism.ResultsAerobic performance, peak oxygen consumption, ventilatory thresholds, velocity at the aerobic–anaerobic threshold, and lactate at exhaustion improved after training. The relative amount of both young RBCs and old RBCs increased, and the amount of the main RBC fraction decreased. Phosphatidylserine externalization and RBC-derived microparticles decreased. Overall deformability expressed as shear stress required to achieve half-maximum deformation to theoretical maximal elongation index at infinite shear stress improved in unfractioned RBCs (p < 0.001). Nitrite decreased in total (p = 0.001), young (p < 0.001), main (p < 0.001), and old (p = 0.020) aged RBCs and in plasma (p = 0.002), but not in very old RBCs.ConclusionThese results indicate that non-endurance-trained healthy participants benefit from a regular moderate running training program because performance-related parameters improve and a younger RBC population with improved RBC properties is induced, which might support oxygen supply in the microcirculation.  相似文献   
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This paper presents a very simple experiment on children's drawings to explore the reasons underlying children's contextual sensitivity. Five‐ and six‐year old children were asked to draw from a model on two consecutive tasks. The only difference between the two tasks was the model's orientation. A model cup was presented on one task with its handle visible (at the side) and on the other task with its handle hidden at the back. Previous research would predict that children of this age should show a tendency towards drawing a familiar model such as a cup in a stereotyped orientation (i.e. handle at the side), irrespective of whether or not the handle was visible. However, the results from the present study showed that the children's preparedness to draw the model as it appeared was influenced by the order of task presentation. The findings are discussed in terms of children's interpretation of the task demands which alters as a result of the contrast between the two tasks.  相似文献   
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