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排序方式: 共有317条查询结果,搜索用时 15 毫秒
1.
Andrew Green Chloe Dafkin Samantha Kerr Warrick McKinon 《European Journal of Sport Science》2017,17(8):994-1003
Scrummaging is a major component of Rugby Union gameplay. Successful scrummaging is dependent on the coordination of the forward players and the strength of the eight individuals. The study aim was to determine whether individual scrummaging kinetics and other candidate factors associated with scrummaging performance discriminate team scrum performances. Sixteen club-level forwards (stature: 1.80?±?0.1?m; mass: 99.0?±?18.2?kg) were initially divided into two scrummaging packs. A total of 10 various scrum permutations were tested, where players were randomly swapped between the two packs. Winning scrums were determined by two observers on opposite sides of the scrum. Fatigue (100?mm visual analogue scale (VAS)) and scrummaging effort (6–20 rating of perceived exertion (RPE)) were assessed following each scrum contest. Individual scrummaging kinetics were acquired through an instrumented scrum ergometer and muscular power indicated through vertical jump heights. Student’s t-tests were used to differentiate between winning and losing scrum packs. VAS and RPE were assessed using repeated measures ANOVAs. Winning scrum packs had significantly larger combined force magnitudes (p?<?.002), regardless of the player contribution calculations. Additionally, winning packs had less individual movement (p?=?.033) and higher combined vertical jump heights (p?<?.001) but were not significantly heavier (p?=?.759) than losing scrum packs. While perceived VAS and RPE values progressively increased (p?<?.001), no differences in the individual scrum magnitudes were observed between the 1st and 10th scrum (p?=?.418). The results indicated that the combination of individual forces, variation in movement and factors related to scrummaging performance, such as vertical jump height, were associated with team scrummaging success. 相似文献
2.
Sharon Parsons 《International Journal of Science Education》2013,35(9):989-1005
This article relates stories of what I have learned by engaging in autobiographical analysis of my work as a science educator, over a seven year period. These stories can be described loosely as 'a play with three acts'. During each act I am played by a somewhat different feminist character who is not only influenced by her own pedagogical and philosophical underpinnings (feminisms) but, by her own disciplinary and institutional contexts. The first act presents an historical feminist perspective. The second act can be described as an emerging postmodern feminist story. The third act is a feminisms story which is where I currently locate my practice. 相似文献
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Human integration through Olympism education: a pragmatic engagement of youths in a war-torn society
Samantha Nanayakkara 《Sport, Education and Society》2016,21(4):623-643
This paper delineates the findings of a mixed methods study that investigated how Olympism education could strengthen competencies of human integration through delivery of physical, social, and critical literacy and conflict resolution literacy. The study introduced a curriculum model integrating Olympism values and conflict resolution strategies for the purpose of facilitating human integration. This integrated curriculum model was then tested among a group of young students who represent the two main ethnic groups Sinhalese and Tamils, in a war-torn society in Sri-Lanka. The intervention of this study provided pragmatic involvement for young students as the representatives of the next generation, in order to teach them the convergence and contradictions of perceptions of social reform ideals through sport. Results revealed that conflict resolution strategies combined with Olympism education integrated curriculum intervention significantly improved young students’ conflict resolution competencies, regardless of their gender or ethnicity. This study demonstrated significant gains in the ability of young students to learn about human integration through learning about Olympism within sport and physical education lessons, in regards to effective conflict resolution. 相似文献
5.
Recent economic pressures have demanded higher education institutions respond with strong, authentic brand promises. This mixed method multi-case study explored the authenticity of common brand promises at three Universities in Canada through Twitter and Facebook postings from February to April 2016 using a cloud-based text and network analytic tool. Our study revealed the content shared on social media channels, while largely trustworthy, was fraught with shades of gray and revealed that sometimes brand promises were used against the university when they appeared disingenuous or threatened institutional norms around equity and social justice. Further, social media strategies are still largely limited to push notification suggesting universities are missing opportunities to strengthen their brand and counter negative messaging. For marketing managers it reinforces investments should be directed toward creating engaging and authentic content that can be expressed through multiple touch-points including social media and this can be monitored through low-cost analytic tools. 相似文献
6.
Joanna Higgins Ro Parsons 《International Journal of Science and Mathematics Education》2011,9(2):503-522
Intervention at scale with the aim of improving student participation, engagement and outcomes in mathematics education is
a challenge for educational policy makers and reformers. This article argues that an iterative annual cycle of policy formulation,
implementation and evaluation enabled ongoing adjustments to the strategic focus, the professional development model and the
system infrastructure as the New Zealand Numeracy Development Project was taken to scale. The analysis draws on the project’s
evaluation data over a 6-year period to demonstrate how adjustments were made over time to the pedagogical tools and to the
professional development processes. The ongoing development of knowledge supported the management of strategic risks in taking
the project to scale: the ongoing appropriation of adequate levels of resourcing to support the school-based professional
development model and the availability of system-wide expertise for effective implementation. The analysis suggests that conceptualising
implementation as an interdependent and interrelated component of an iterative policy process and as an opportunity for knowledge
building ensured a continuing focus on student outcomes. The dynamic approach to the policy process appeared central to building
this intervention’s effectiveness and feasibility at scale. 相似文献
7.
Pigeons' keypecking was reinforced by food on baseline schedules of multiple variable interval (VI) x VI x and on contrast schedules of multiple VI x VI y. Deprivation of food was varied by maintaining subjects at 75%, 85%, and 95% (+/- 2%) of their free-feeding weights. Positive and negative behavioral contrast were observed. The size of the contrast was not systematically altered by changes in deprivation. Positive and negative contrast were both larger later in the session than they were earlier. Within-session decreases in responding were steeper for the baseline than for the contrast schedules for positive contrast. Within-session decreases were steeper for the contrast than for the baseline schedules for negative contrast. These results were predicted by the idea that different amounts of habituation to the reinforcer during the baseline and contrast schedules contribute to behavioral contrast. The results show that contrast occurs under conditions that reduce the effect of the following component. The results support the assumption that positive and negative contrast are produced by symmetrical theoretical variables. 相似文献
8.
Patrick R. Parsons 《广播与电子媒介杂志》2013,57(3):354-365
For the last 20 years, scholarly and popular accounts of the development of cable television have recounted the story of John Walson, Sr., who claimed to have started the first CATV system in June of 1948 in Mahanoy City, Pennsylvania. When Walson died in March of 1993, newspapers around the country credited him with starting the nation's first cable system and even “founding”; the industry. The claim, however, has always been clouded by questions and a lack of documentation. This paper reports the results of an investigation of the Walson story. It concludes that, as bright and promising as the Walson tale may be, it probably is not true. At the very least, the preponderance of evidence suggests that Walson got his start in the community antenna television business in late 1950, about the same time as many others around the country and, importantly, probably after another group of businessmen already had begun a system in Mahanoy City itself. 相似文献
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