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31.
It is perceived that, during the triathlon or duathlon, cycling with a steep (>76°) rather than a shallow (?76°) frame geometry might attenuate the fatigue associated with progression from the cycle to run disciplines and improve subsequent 10-km running performance. This is based on anecdotal testimony from athletes purporting to have experienced improved performance; no empirical evidence exists. To evaluate this view, eight male triathletes completed a counterbalanced, 40-km cycle ride at two frame geometries (73° and 81°) at ~70% VO 2peak . Immediately after completion of each 40-km cycle, a self-paced 10-km treadmill time trial was undertaken, during which physiological, kinematic and performance variables were measured. The 10-km run performance (mean - s : 42:55 - 4:19 vs 46:15 - 4:52 min; P ? 0.01) and combined cycle and run performance (1:45:49 - 5:45 vs 1:50:33 - 6:08; P ? 0.001) were faster in the 81° than the 73° condition. Improvements in performance were most prominent during the first 5 km of the run (21:41 - 2:15 vs 24:15 - 2:31 min in the 81° and 73° conditions respectively). These improvements were not evident during the second 5 km of the run. No differences in physiological variables were noted, although heart rate, stride length and stride frequency were increased during the 81° condition ( P ? 0.05). Modifying frame geometry from a seat tube angle of 73° to 81° improves 10-km running and combined cycle plus run performance. These improvements in performance might relate to alterations during the cycling phase, which minimizes the 'residual effect' of this (i.e. the adverse changes in substrate availability, thermoregulatory, cardiovascular and biomechanical factors felt immediately after transition from cycling to running) and attenuates negative changes in physiological and kinematic responses during the 10-km run. 相似文献
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Jeffrey W. Kassing Kevin J. Pearce Dominic A. Infante 《Communication Research Reports》2013,30(3):237-249
This study was based on a communication‐oriented perspective of corporal punishment of children. The perspective posits that physically aggressive influence tactics would be associated with aggressive communication and a set of communication outcomes. The perceptions of 74 father‐son dyads were solicited to test these relationships. Results indicated that when there was lower argumentativeness and higher verbal aggressiveness in father‐son communication there was more corporal punishment as an influence tactic and that fathers and sons perceived the relationship as less favorable in terms of influence success, communication competence, affirming style, and credibility. 相似文献
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AbstractAgency, understood as the capacity to act independently and to make one’s own choices, is considered central to children’s development. Thus, education, and hence education curricula, have a role in the development of learner agency. While curriculum development is a key focus for educational theory, research, policy, and classroom practice, the potential implications of curriculum content selections for learner agency remain underexplored. Theoretically, this paper engages with critical realism, explaining how it can provide theoretical foundation for a more comprehensive view of learner agency and, by implication, more balanced curricula. Empirically, the paper draws on the findings from a content analysis of the national curriculum documents of four countries with relatively high scores in international comparative tables, England, Australia, Hong-Kong, and Canada, to develop a new typology of primary curricula. Based on the extent of emphasis placed on knowledge versus skills, values, and attitudes, three types of curricula were identified: knowledge-based, skills-oriented, and learner-centred. Due to its significant theoretical and practical influence globally, we focus on the knowledge-based model and its likely impact on students’ agency. We conclude by highlighting the importance of making learner agency a key orientation of the curriculum and suggesting directions for future research. 相似文献
35.
Development of Intra‐ and Intergroup Judgments in the Context of Moral and Social‐Conventional Norms
Melanie Killen Adam Rutland Dominic Abrams Kelly Lynn Mulvey Aline Hitti 《Child development》2013,84(3):1063-1080
Children and adolescents evaluated group inclusion and exclusion in the context of generic and group‐specific norms involving morality and social conventions. Participants (N = 381), aged 9.5 and 13.5 years, judged an in‐group member's decision to deviate from the norms of the group, whom to include, and whether their personal preference was the same as what they expected a group should do. Deviating from in‐group moral norms about unequal allocation of resources was viewed more positively than deviating from conventional norms about nontraditional dress codes. With age, participants gave priority to group‐specific norms and differentiated what the group should do from their own preference about the group's decision, revealing a developmental picture about children's complex understanding of group dynamics and group norms. 相似文献
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Dominic Wyse 《Education 3-13》2013,41(2):181-191
The Government's recent Creative Partnerships initiative in England represents part of the resurgence of interest in creativity which was stimulated by the NACCCE's 1999 All our futures report. However, many questions remain about the impact and processes of creative partnerships. The field of creativity research has been dominated by two key questions: how should creativity be defined and is it possible to teach creativity? Much has been written which attempts to shed light on the answers to these questions so it is important that creative partnerships' work is understood in the context of what it already known from research and theory. A welcome aspect of Creative Partnerships is the desire to ensure an evidence base to support the creative work happening in schools. Frequently this evidence base has been built in part by using action research methodology which has a strong track record in the context of practitioner research. This paper reports on work done with Creative Partnerships which involved the use of an action research framework to support creative work. It is concluded that there are potential problems with assuming that creativity will be enhanced by approaches such as multiple intelligence without careful thought about the way in which creativity is defined. It is also shown that action research does have the potential to enhance creative work but that one of the most important aspects of this is the relationships that are built between mentors and teachers. 相似文献
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Inger Andersen Naoko Ishii Thomas Brooks Cynthia Cummis Gustavo Fonseca Astrid Hillers Nicholas Macfarlane Nebojsa Nakicenovic Kevin Moss Johan Rockstr?m Andrew Steer Dominic Waughray Caroline Zimm 《国家科学评论(英文版)》2021,(7):12-15
The 2015 Paris Agreement to keep global warming well below 2℃above pre-industrial levels and aim towards limiting warming to 1.5℃marked a wa-tershed in planetar... 相似文献
39.
The Sterkfontein Caves UNESCO World Heritage site represents one of South Africa’s most valuable cultural heritage resources and is one of the world’s most prolific palaeoanthropological sites with its fossiliferous deposits spanning the last 3.5 million years. One of the most famous fossil-bearing deposits at Sterkfontein is the 2.5 million-year-old Member 4. This is the world’s richest Australopithecus-bearing deposit and has yielded iconic fossils like StS 5 – Mrs Ples, StW 53, two partial skeletons, and two species of Australopithecus. After 80 years of research, Member 4 continues to provide crucial evidence for human origins research. Over the last 35 years, since excavation of the Member 4 started exposing the walls of the deposit, their deterioration has been accelerating. The implications of this deterioration and impending collapse are severe, not only from a palaeoanthropological perspective but also a heritage management point of view. This article focuses on our efforts to conserve the deteriorating areas of the Member 4 excavation site. The project required the development of a comprehensive set of strategies that had to be adapted to the specific requirements of the national and local heritage management agencies and remain sensitive to ongoing research programmes. The strategy developed included: multiscale integrative documentation of the exposed deposits; comprehensive, independent but cohesive stabilization of the different components of the deposit while maintaining visibility for ongoing and future research; and installation of stabilization infrastructure that could be adapted to the long-term conservation excavation plan while maintaining deposit integrity and site safety. 相似文献
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