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301.
Abstract

The aim of this study was to compare accumulated oxygen deficit data derived using two different exercise protocols with the aim of producing a less time-consuming test specifically for use with athletes. Six road and four track male endurance cyclists performed two series of cycle ergometer tests. The first series involved five 10 min sub-maximal cycle exercise bouts, a VO2peak test and a 115% VO2peak test. Data from these tests were used to estimate the accumulated oxygen deficit according to the calculations of Medbø et al. (1988). In the second series of tests, participants performed a 15 min incremental cycle ergometer test followed, 2 min later, by a 2 min variable resistance test in which they completed as much work as possible while pedalling at a constant rate. Analysis revealed that the accumulated oxygen deficit calculated from the first series of tests was higher (P<0.02) than that calculated from the second series: 52.3±11.7 and 43.9±6.4 ml·kg?1, respectively (mean±s). Other significant differences between the two protocols were observed for VO2peak, total work and maximal heart rate; all were higher during the modified protocol (P<0.01 and P<0.02, respectively). Oxygen kinetics were also significantly faster during the modified 2 min maximal test. We conclude that the difference in accumulated oxygen deficit between protocols was probably due to a reduced oxygen uptake, possibly caused by a slower oxygen on-response during the 115% VO2peak test in the first series, and VO2—power output regression differences caused by an elevated VO 2 during the early stages of the second series.  相似文献   
302.
Abstract

The power output achieved at peak oxygen consumption (VO 2Peak) and the time this power can be maintained (i. e., Tmax) have been used in prescribing high-intensity interval training. In this context, the present study examined temporal aspects of the VO2 response to exercise at the cycling power that output well trained cyclists achieve their VO 2peak (i. e., Pmax). Following a progressive exercise test to determine VO 2peak, 43 well trained male cyclists (M age = 25 years, SD = 6; M mass = 75 kg, SD = 7; M VO2 peak = 64.8 ml-kg1 min?1, SD = 5.2) performed two Tmax tests 1 week apart. Values expressed for each participant are means and standard deviations of these two tests. Participants achieved a mean VO 2peak during the Tmax test after 176 s (SD = 40; M = 74% of Tmax, SD = 12) and maintained it for 66 s (SD = 39; M = 26% of Tmax, SD = 12). Additionally, they obtained mean 95% of VO 2peak after 147 s (SD = 31; M = 62% of Tmax, SD = 8) and maintained it for 95 s (SD = 38; M = 38 % of Tmax, SD = 8). These results suggest that 60–70 % of Tmax is an appropriate exercise duration for a population of well trained cyclists to attain VO 2peak during exercise at Pmax. However, due to intraparticipant variability in the temporal aspects of the VO2 response to exercise at Pmax, future research is needed to examine whether individual high-intensity interval training programs for well trained endurance athletes might best be prescribed according to an athlete's individual VO2 response to exercise at Pmax.  相似文献   
303.
Teacher-conducted assessments of practical skills are a compulsory component of GCSE examinations in science in England and Wales. The paper presents some of the findings of a research project that investigated this aspect of a science teacher's work. The project was concerned principally with the ways in which science teachers interpreted and operationalised the policy decision of central government and examination boards that teachers assume responsibility for the internal assessment of the practical competence of pupils aged 14–16 preparing for GCSE examinations in science. Specializations: the social history and politics of school science education  相似文献   
304.
305.
This study examines the impact of universities’ reputation on teaching income and demonstrates how strongly reputation may affect the fees that they can charge. Higher Education is increasingly competitive and international, and institutions are preoccupied with national and international prestige. Research output is demonstrably central to reputation and, specifically, to global rankings, but less has been written about the benefits of high prestige for teaching income and the ability to charge high fees. This article uses English data to show the impact when fees are partially deregulated. Public universities with high rankings in global league tables and on domestic measures can command teaching income per student which is very much higher (in this case typically more than a third) than lower‐prestige institutions. This financial return to prestige further increases universities’ incentives to seek high positions in league tables and establish a reputational brand.  相似文献   
306.
Although curriculum orientations are widely discussed in educational literature, the extent to which teachers and other educational specialists in the United States hold these curriculum orientations is neither well documented nor well known. The relationships between a teacher's beliefs and the five dominant curriculum orientations (Academic Rationalism, Behavioural, Humanistic, Social Reconstruction and Cognitive Process) are unclear. Therefore, it is difficult to discuss the nature of how these curriculum orientations influence teacher choices and their execution and implementation of educational policy. This study replicated the 2002 research of Cheung and Wong in Hong Kong. A sample of 308 teachers in the United States participated. Findings indicate that the reliability and validity of the data were weak to moderate, and gender, level, subject speciality and experience influence a teacher's value of the particular curriculum orientations. The research also indicates that the construct of complementary pluralism (a strong positive relationship between the orientations of an individual teacher) does not exist with the same level of intensity for teachers in the United States. Rather, the theoretical opposition of the curriculum orientations is a practical opposition.  相似文献   
307.
The purpose of this article is to summarize the recent literature on caregiving in order to identify viable ways to educate families to care for elderly relatives in the home environment. The demands and stresses currently associated with providing home care to older members are discussed, followed by an overview of support services that represent promising and workable approaches in enhancing families’ home‐caregiving capacities. With few exceptions, this paper is based on caregiving research published in the past five years.  相似文献   
308.
The ability of kindergarten and 3rd-grade children to accurately interpret implied motion in pictures was examined. Sixty-four children responded to pictures from experimental conditions that varied type of motion, cueing strategy, pictorial complexity, and color. The 3rd-grade children were more adept at identifying implied motion than the kindergarten children, the postural motion condition was more effective than the flow-line condition in conveying motion, and cues and relevant pictorial background information increased accuracy of interpretation.  相似文献   
309.
This study outlines what 29 part-time adult learners perceive as effective teacher (tutor/instructor/lecturer) practice in supporting their learning. The positive characteristics of teacher support from the students' perspective are first examined, and then what they found to be disappointing. Finally, the underlying themes that emerge are considered and the data is subjected to a holistic interpretation. Overall, the study confirmed the usefulness of a framework developed from a consideration of literature on learner-centred education and students' conceptions of learning. The investigation was able to reveal both key differences between and key similarities among the groups of students. The differences relate to conceptions of the roles and responsibilities of both students and teachers, while the similarities relate to the relationships between the parties in the teaching and learning environment. The implications for tutors/lecturers in improving their support to their students are highly significant. However, the most challenging task in establishing a learner-centred context is to influence students' learning conceptions and help them take a more active role in their learning.  相似文献   
310.
  • Plain language summaries (PLS) are accessible, short, peer-reviewed summaries of scholarly journal articles written in non-technical language.
  • The aim of PLS is to enable a broader audience of experts and non-experts to understand the original article.
  • Here, we outline the evidence base for the value and impact of PLS and how they can enable diversity, equity, inclusion and accessibility in scholarly publishing.
  • PLS can diversify readership and authorship, address information inequity, include typically under-represented stakeholders and provide an accessible route into scholarly literature.
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