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排序方式: 共有558条查询结果,搜索用时 15 毫秒
541.
542.
543.
Alan Chalmers Lloyd Ackert Pnina Abir-Am Maria Trochatos Carolyn R. Miller Nicolas Rasmussen Roy Macleod Ingo Brigandt Lorna Barrow Ian Maclean Elof Axel Carlson Susan E. Cozzens Cindy Klestinec Patricia O'Grady Alison Bashford Jim Endersby Jonathan Simon David Mercer David Oldroyd Suzanne Verderber Peter Slezak Rachel Cooper Patricia Fara Ravi Arvind Palat Peder Anker Bernhard Fritscher David Branagan 《Metascience》2002,11(3):329-429
544.
A comparison of the under‐18 (U‐18) and under‐16 (U‐16) squads of the Canadian national soccer team with a representative sample of Canadians (Canada Fitness Survey, 1983) showed a tendency for the development or selection of the older players in teams of stature (U‐18, 175.8 cm; U‐16, 171.1 cm; CFS, 170.9 cm) and lean body mass (U‐18, 63.4; U‐16, 57.9; CFS, 54.2 kg). The larger lean mass of the older players could not be explained simply by size. The U‐18s also showed greater isokinetic leg extension force (particularly for rapid movements) and explosive strength (vertical jump) relative to the younger players, although the knee extension force was less than in some classes of athlete. Part of the gain in mass seems due to local training of the hip and leg muscles and part to a more general muscular development. Contrary to some reports, the hip flexibility of the Canadian players (sit and reach test) was greater than for a national sample; this may be important in avoiding soft tissue injuries to the legs. However, aerobic power (58.3±5.3 ml kg‐1 min‐1) and body fat (8.0±l.l%) were unremarkable. 相似文献
545.
Roy McCree 《国际体育史杂志》2013,30(4):472-492
The study of the global diffusion of modern sport and the relationship between local and global processes has focused on their divergent, contested and cohesive character. Major criticisms of this study, however, include the lack of empirical and historical research, the neglect of the role of the imperial and other middle classes and a tendency to present globalization as a late-twentieth-century phenomenon driven by Americanization. By way of a regional case study of the Trinidad Amateur Athletic Association during the British colonial period 1945–1952, this paper examines (i) the varying effects of the globalization of sport through the spread of amateurism and professionalization; (ii) the role of the middle classes; (iii) the historical connection and disconnection between global and local processes; and (iv) the horizontal nature of the diffusion process, in order to counter the currently too dominant focus on vertical diffusion between first world and third world countries. 相似文献
546.
Three experiments delivered food at fixed or random intervals independently of the rat’s behavior, always less than the amount eaten with food freely available. The results revealed a Polydipsie response to this experimental suppression of eating, and total drinking decreased as total eating increased. When we added a lever that signaled each food delivery, leverpressing and drinking rose far above their baseline levels; both responses decreased as total eating increased. When a similar schedule presented lever and food independently, rats still became Polydipsie, but showed no sign of autoshaped leverpressing. A fourth experiment revealed a hypophagic response to schedules that suppressed drinking; total eating increased with total drinking. As mutual substitutes in the economic sense, one behavior falls as the other rises; as mutual complements in the economic sense, the two behaviors rise or fall together. We discuss polydipsia and autoshaping in terms of drinking as an intrinsic substitute for eating, and leverpressing as a learned substitute for eating. The results suggest a revision of conservation theory, which views drinking and eating as substitutes when the schedule suppresses eating but as complements when the schedule suppresses drinking. 相似文献
547.
The Educated Habitus, Progress at School, and Real Knowledge 总被引:1,自引:0,他引:1
Roy Nash 《Interchange》2002,33(1):27-48
The New Zealand Progress at School study has demonstrated that certain personal dispositions, elements of the habitus, are associated with relative educational progress at school. The most important of these prove to be aspiration, academic self-concept, and perception of schooling. It is suggested, however, that these characteristics of the successful student are elements of the stratified self, unified by an overarching concept of education. Interview material with senior secondary school students is used to show how the desire to be educated within a specific concept of education is essential to their success. It is argued, with close reference to Bourdieu, that the concepts of education and the educated person need to be founded on the educational necessary as real knowledge. 相似文献
548.
Kaustuv Roy 《Educational theory》2005,55(4):443-459
This essay explores Henri Bergson's intuition as a philosophical and methodological concept, specifically considering how it might be useful in thinking about education. The main argument is that the repetition-succession model of time — or time as measure — that became established in modernity, and to which we are habituated, edits out of consciousness an organic, qualitative, nonhomogeneous aspect of time that is more true to our being-in-the world, resulting in an unfortunate thinning of our lives. An understanding of this different dimension of time, called duration here, awakens the intuition, making us less dependent on mechanical time, which is finitude, and more open to the nonmeasurable, qualitative aspects of phenomena. Pedagogically, this essay offers a praxis that aims toward a liberatory awakening to the conditions of our experience. 相似文献
549.
Kristen E. DiCerbo Yuning Xu Roy Levy Emily Lai Laura Holland 《Educational Assessment》2017,22(4):275-297
Inferences about student knowledge, skills, and attributes based on digital activity still largely come from whether students ultimately get a correct result or not. However, the ability to collect activity stream data as individuals interact with digital environments provides information about students’ processes as they progress through learning activities. These data have the potential to yield information about student cognition if methods can be developed to identify and aggregate evidence from diverse data sources. This work demonstrates how data from multiple carefully designed activities aligned to a learning progression can be used to support inferences about students’ levels of understanding of the geometric measurement of area. The article demonstrates evidence identification and aggregation of activity stream data from two different digital activities, responses to traditional assessment items, and ratings based on observation of in-person non-digital activity aligned to a common learning progression using a Bayesian Network approach. 相似文献
550.
Roy F. Privett 《Journal of The Franklin Institute》2004,341(3):185-190
Dr. Atal was chosen for his fundamental contributions to speech coding in digital cellular telephony—specifically for pioneering work in linear predictive coding (LPC) and use of analysis-by-synthesis leading to multi-pulse excited linear predictive coding and code excited linear predictive coding (CELP). These are the basis of time-division and code-division cellular systems (TDMA & CDMA), the Nextel system, and the global system for mobile communications (GSM). 相似文献