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61.
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For the athlete training hard, nutritional supplements are often seen as promoting adaptations to training, allowing more consistent and intensive training by promoting recovery between training sessions, reducing interruptions to training because of illness or injury, and enhancing competitive performance. Surveys show that the prevalence of supplement use is widespread among sportsmen and women, but the use of few of these products is supported by a sound research base and some may even be harmful to the athlete. Special sports foods, including energy bars and sports drinks, have a real role to play, and some protein supplements and meal replacements may also be useful in some circumstances. Where there is a demonstrated deficiency of an essential nutrient, an increased intake from food or from supplementation may help, but many athletes ignore the need for caution in supplement use and take supplements in doses that are not necessary or may even be harmful. Some supplements do offer the prospect of improved performance; these include creatine, caffeine, bicarbonate and, perhaps, a very few others. There is no evidence that prohormones such as androstenedione are effective in enhancing muscle mass or strength, and these prohormones may result in negative health consequences, as well as positive drug tests. Contamination of supplements that may cause an athlete to fail a doping test is widespread.  相似文献   
63.
This article seeks to synthesize and apply White racial identity theory and concomitant research to the interaction between athletic and racial identity, specifically as it relates to the experiential variations of how race impacts White athletes within the college sport environment. White dialectics, or the tensions that White Americans experience as dominant social group members, serve as the guiding theoretical framework and provide a theoretical lens through which the experience of White college athletes is examined at each distinct dialectic. Through this article, the application of White dialectics offers a theoretical foundation for developing a better understanding of how White college athletes not only make sense of their racial identity, but also understand their racialized experiences within intercollegiate athletics.  相似文献   
64.
Trevor H. Levere 《Interchange》2006,37(1-2):115-128
Scientists often use more than the results of experiment to arrive at a result; they use anticipation and analogy to arrive at the results that fit their theories, and sometimes they correct results in the light of analogy. They also need to be clear about the difference between accuracy and precision. They do all this using not only theories, but also apparatus, and the interplay between apparatus and the development of concepts and theories is often crucial. Historians of chemistry (notably including the recent work of Usselman, Rocke, and Holmes) furnish us with plenty of examples of such interplay, and of the selection of data in the light of theory. Lavoisier, Dalton, and Liebig can each teach us a good deal about the way that good scientists arrive at reproducible results.  相似文献   
65.
Large numbers of students from the Chinese‐speaking world are nowadays enrolled in Western universities, prompting the need for awareness of their educational beliefs and practices. Although an established literature seeks to characterize ‘the Chinese learner’, much of this research results in stereotypical representations of a ‘reduced Other’: passive, uncritical and over‐reliant on the instructor. This paper, which is based on ethnographic research conducted in universities in the People’s Republic of China, aims to illuminate some of the common misperceptions of Chinese educational cultures.  相似文献   
66.
Much is made of the potential of lifelong learning for individuals and organisations. In this article we tend to make much less of it, certainly with respect to its use in universities to discipline academics. Nevertheless, we argue that academics now need to re-learn the positions they occupy and the stances they take in response to the marketisation of Australian universities. In particular, we suggest that the position of (pure) critique no longer commands attention in Australian contexts of higher education, although the paper does not suggest a disregard for a critical stance purely for the sake of participation. It is in understanding the interconnections between position and stance , and how they might be strategically performed during the everyday practices of academics, that a more promising way of engaging with the venalities of the market is envisaged; a strategy that could be described as 'sailing into the wind'. In discussing these matters, the paper draws on semi-structured interviews with academics located in university faculties/departments/schools of education along Australia's eastern seaboard.  相似文献   
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The 2008 commercial video game Spore allowed more than a million players to design their own life forms. Starting from single-celled organisms players played through a caricature of natural history. Press coverage of the game??s release offer two frames for thinking about the implications of the game. Some scientists and educators saw the game as a troubling teacher of intelligent design, while others suggested it might excite public interest in science. This paper explores the extent to which these two ways of thinking about the game are consistent with what players have done with the game in its online community. This analysis suggests that, at least for the players participating in this community, the game has not seduced them into believing in intelligent design. Instead the activities of these players suggest that the game has played a catalytic role in engaging the public with science. These findings indicate that designers of educational games may wish to consider more deeply tensions between prioritizing accuracy of content in educational games over player engagement.  相似文献   
69.
When sight was added to sound, the problems of presenting the news of the day multiplied, as did the cost of such coverage. Nevertheless, few news directors are satisfied with the strict “man‐on‐camera” approach; they prefer to use the additional information channel for a certain amount of visual augmentation of the audio channel's content. Beacuse television stations in a given market rarely have a chance to examine the output of stations in other markets, the survey reported in the following article was made'. Both the sources of visual news materials and their uses are studied in a sample of midwestern stations. It is interesting to examine this report after a review of William Hazard's study for the Radio‐Television News Directors Association, “Adequacy of Coverage by Still Picture and Film Services” published in the Journal of Broadcasting, Vol. IV, No. 1, pp. 64–76, Winter, 1959–60.  相似文献   
70.
This article extends currently reported theory and practice in the use of learning goals or targets with students in secondary and further education. Goal-setting and action-planning constructs are employed in personal development plans (PDPs) and personal learning plans (PLPs) and are advocated as practice within the English national policy agenda with its focus on personalisation. The article argues that frameworks widely used for goal setting and action planning by UK educational practitioners, in particular SMART targets or goals, have yet to be rigorously examined in the light of relevant theory and practice. Doing so is important given contemporary emphasis on the dimensions of the learner experience regarded by ‘learning to learn’ practitioners as underpinning effective learning in the modern classroom. The article draws from social cognitive theory and achievement goal theory, including Zimmerman's criteria for appropriate goals, to suggest an alternative framework for goal or target setting – ‘well-formed outcomes’, a construct from the field of neuro-linguistic programming (NLP). In comparison with SMART targets, the authors argue that well-formed outcomes offer a more rigorous and holistic approach, by taking greater account of the learner's identity, affective dimensions (feelings and emotions), social relations and values, as well as encouraging mental rehearsal.  相似文献   
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