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When "where" is more important than "when": birthplace and birthdate effects on the achievement of sporting expertise 总被引:3,自引:2,他引:1
In this study, we assessed whether contextual factors related to where or when an athlete is born influence their likelihood of playing professional sport. The birthplace and birth month of all American players in the National Hockey League, National Basketball Association, Major League Baseball, and Professional Golfer's Association, and all Canadian players in the National Hockey League were collected from official websites. Monte Carlo simulations were used to verify if the birthplace of these professional athletes deviated in any systematic way from the official census population distribution, and chi-square analyses were conducted to determine whether the players' birth months were evenly distributed throughout the year. Results showed a birthplace bias towards smaller cities, with professional athletes being over-represented in cities of less than 500,000 and under-represented in cities of 500,000 and over. A birth month/relative age effect (in the form of a distinct bias towards elite athletes being relatively older than their peers) was found for hockey and baseball but not for basketball and golf. Comparative analyses suggested that contextual factors associated with place of birth contribute more influentially to the achievement of an elite level of sport performance than does relative age and that these factors are essentially independent in their influences on expertise development. 相似文献
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The influential Text REtrieval Conference (TREC) retrieval conference has always relied upon specialist assessors or occasionally participating groups to create relevance judgements for the tracks that it runs. Recently however, crowdsourcing has been championed as a cheap, fast and effective alternative to traditional TREC-like assessments. In 2010, TREC tracks experimented with crowdsourcing for the very first time. In this paper, we report our successful experience in creating relevance assessments for the TREC Blog track 2010 top news stories task using crowdsourcing. In particular, we crowdsourced both real-time newsworthiness assessments for news stories as well as traditional relevance assessments for blog posts. We conclude that crowdsourcing not only appears to be a feasible, but also cheap and fast means to generate relevance assessments. Furthermore, we detail our experiences running the crowdsourced evaluation of the TREC Blog track, discuss the lessons learned, and provide best practices. 相似文献
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Doune Macdonald 《Quest (Human Kinetics)》2013,65(2):197-201
Crum's notion of idola as a conceptual fallacy is interesting, somewhat helpful, yet potentially limiting in a critique of research in PE if one is to accept a postmodern or poststructuralist position. In line with a poststructuralist position, a strength in Crum's application of idola is the recognition that research in PE is constituted by the researcher and their social world which, in turn, constitutes the researcher. Limitations to Crum's idola thesis arise when the notion is used to suggest that as a resull of the researcher's lack of conceptual clarity, the quest for knowledge or truth about PE pedagogy is undermined as this assumes that meanings can be unequivocal and precede a linear research process. In cantrast, this response argues that a priority in research should be to examine how, and under what conditions, panicular discourses come to shape PE practices in schools and universities. In a postmodern world, conceptual clarity should not he the goal but rather a coming lo understand how PE knowledge and practice is being constructed across sites and contexts. 相似文献
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Helen Mary Macdonald 《Teaching in Higher Education》2013,18(6):670-682
This article examines the potential and limitations of Megan Boler's ‘pedagogy of discomfort’ in a post-apartheid yet heavily racialised South Africa. Taking an ‘ethnographic sensibility’ to anthropological teaching, this paper sketches the social and historical context of discomfort produced by everyday classroom practices at a historically privileged university. This paper argues that new patterns of thought, if achieved at all in the course of learning through ‘discomfort’, are deeply embedded within uneasy social relationships. 相似文献
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