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31.
ABSTRACT

Datafication of student learning has carved out an influential space for public and private actors who design technologies for visualizing data. As data visualizations shape how teachers’ interpret data, they are powerful devices. This paper examines how teachers get configured as data users in the making of Danish national test data visualizations for municipal primary and lower secondary schools. The paper is based on a qualitative study of the Danish Ministry of Education, which develops the official visualizations, and NordicMetrics, a private consultancy offering a supplementing visualization of student progression. We draw on science and technology studies (STS) to theorize techno-organizational dynamics of developing visualizations. We propose to understand data visualizations as contingent, situated and socio-material achievements that configure teacher as data users. Comparing two institutions’ respective negotiations of different concerns when developing data visualizations enables us to consider the otherwise ‘hidden’ data mediators and the entwined relations between public and private data mediators.  相似文献   
32.
Water quality experiments, especially the use of macroinvertebrates as indicators of water quality, offer an ideal context for connecting statistics and science. In the STAR program for secondary students and teachers, water quality experiments were also used as a context for teaching statistics. In this article, we trace one activity that uses virtual streams and repeated sampling to develop the notion of a hypothesis test for one proportion.  相似文献   
33.
This paper describes a semester concerned with international student teamwork. Here we emphasize the development of technical as well as personal competencies. Participants have completed at least four academic semesters at university or college. Students are given an opportunity to use their acquired knowledge, to develop a deeper insight of technical subjects and integrate them through product development. One hundred and ninety-five students from 14 different countries have joined since the start in 1995. The paper reports our experience of product design implementation in an integrated engineering context. Design is not an isolated activity; it must be integrated with the entire spectrum of activities within the company. The designer must learn to appreciate the requirements of marketing and work within the bounds of available technology. The course teaches that collaboration and co-operation are vital activities of every designer. It is important to ensure that the product designed fulfils the market needs and can be manufactured competitively. A system to assess both individual contribution and group performance is reported. This semester has proved to be an effective way to develop skills needed and to develop students' international awareness alongside their enhanced technical skills. This semester contributes to developing European competitiveness.  相似文献   
34.
Conclusion Our experience with interactive distance education for science teachers has been both exciting and rewarding. This class has convinced us that activity-based science method classes can be presented with this technology. Working with distance education equipment requires the creative combination of long-established teaching techniques with novel procedures required by the technology. Although the technology does involve inevitable limitations and compromises, it sharpens some teaching skills and provides an opportunity for teachers to learn and do more science. As available tools for distance education become even more sophisticated, delivery techniques will have to be altered continually. Doubtlessly, technological developments will continue to be increasingly site friendly. In the future, one can anticipate forms of distance education that will enable communication with an infinite number of remote sites, thus establishing the definitive electronic science classroom.  相似文献   
35.
This study's purpose was to determine whether science teaching self-efficacy beliefs among new teachers of elementary science interact significantly with teaching environments in their schools. The study hypothesized a mechanism by which environments can interact with self-efficacy and, consequently, affect the quality of science teaching. The self-efficacy of new elementary teachers from Denmark was assessed at the beginning, middle, and end of their first year of teaching. Their teaching success and environments were also assessed. It was found that positive changes in self-efficacy seemed positively related to the occurrence of environmental factors helpful to teaching (r= .401; p= .011; n= 39). In three case studies, there was some support for this association from assessments, interviews, and success in teaching.  相似文献   
36.
The aims of this study were to examine the release speed of the ball in maximal instep kicking with the preferred and the non-preferred leg and to relate ball speed to biomechanical differences observed during the kicking action. Seven skilled soccer players performed maximal speed place kicks with the preferred and the nonpreferred leg; their movements were filmed at 400 Hz. The inter-segmental kinematics and kinetics were derived. A coefficient of restitution between the foot and the ball was calculated and rate of force development in the hip flexors and the knee extensors was measured using a Kin-Com dynamometer. Higher ball speeds were achieved with the preferred leg as a result of the higher foot speed and coefficient of restitution at the time of impact compared with the non-preferred leg. These higher foot speeds were caused by a greater amount of work on the shank originating from the angular velocity of the thigh. No differences were found in muscle moments or rate of force development. We conclude that the difference in maximal ball speed between the preferred and the non-preferred leg is caused by a better inter-segmental motion pattern and a transfer of velocity from the foot to the ball when kicking with the preferred leg.  相似文献   
37.
Abstract

Maximum oxygen uptake ([Vdot]O2PEAK) is generally considered to be the best single marker for aerobic fitness. While a positive relationship between daily physical activity and aerobic fitness has been established in adults, the relationship appears less clear in children and adolescents. The purpose of this paper is to summarise recently published data on the relationship between daily physical activity, as measured by accelerometers, and [Vdot]O2PEAK in children and adolescents. A PubMed search was performed on 29 October 2010 to identify relevant articles. Studies were considered relevant if they included measurement of daily physical activity by accelerometry and related to a [Vdot]O2PEAK either measured directly at a maximal exercise test or estimated from maximal power output. A total of nine studies were identified, with a total number of 6116 children and adolescents investigated. Most studies reported a low-to-moderate relationship (r = 0.10–0.45) between objectively measured daily physical activity and [Vdot]O2PEAK. No conclusive evidence exists that physical activity of higher intensities are more closely related to [Vdot]O2PEAK, than lower intensities.  相似文献   
38.
Abstract

Thirty-three college men doing the toe-touch test were used as subjects to ascertain the relative contribution of the back and hamstring muscles to hip joint flexibility. The subjects, performing six tests over a 5-week period, were photographed during each of their tests. Anthropometric measurements were taken prior to testing to determine if there was any relationship to flexibility. Making use of concentric circles and marking reference points on the subject prior to testing, it was possible to ascertain the curvature of the back, the angle of straight back flexibility, and the angle of bent back flexibility.

Results indicate that the extensibility of the hamstring muscles appeared to be one of the main contributing factors to hip joint flexion, and since the warm-up did not affect the flexibility of the back, one might conclude that the back made no increased contribution to hip joint flexion, as measured in this study. There was no significant relationship to the angle of bent back flexibility.  相似文献   
39.
Abstract

The present study tested whether there were significant sport competition anxiety differences among sex-typed, androgynous, and cross sex-typed subjects and whether these differences were consistent with gender schema theory (Bem, 1981b).

Approximately 700 subjects were administered the Bem Sex-Role Inventory (BSRI) and, using two methods of scoring, 216 subjects were selected because of being either sex-typed (masculine males, feminine females), cross sex-typed (masculine females, feminine males) or androgynous (males and females who have strong masculine and feminine dimensions). Each subject was tested for competition anxiety using the Sport Competition Anxiety Test (SCAT). A one-way ANOVA of SCAT scores by group was significant, F(5,210) = 6.52, p < .001. Post-hoc analysis revealed that feminine females had significantly more competitive trait anxiety than all other groups and androgynous females were more anxious than masculine males (p < .05). The results are discussed in terms of gender schema theory.  相似文献   
40.
This paper addresses the development in children’s and adults’ awareness of the benefits of writing through the analysis of change in notetaking while engaged in scientific inquiry over 10 weeks. Participants were given a notebook that they could choose to use. Our results indicate consistent differences between the performance of adults versus children and also across time. First, there were clear differences in the number of participants who chose to take notes. Second, not only did adults write more notes than children, but also the adults’ mean number of notes slightly increased over time, whereas children’s notes actually decreased in frequency. Third, children and adults differed in the types of notes they took. These results are interpreted in terms of participants’ awareness of what needs to be noted in a scientific task and why it needs to be noted, and they suggest implications for educational practice. First, because learners often have inaccurate representations of the task demands and their own future state of knowledge, they do not perceive the utility of notetaking. Second, because of these misperceptions, learners do not refer back to their notes and thereby miss feedback that would spur the refinement of their metacognitive (particularly metastrategic) knowledge and strategy use. Educators need to design opportunities for students to engage in activities that increase metacognitive knowledge of their own cognitive abilities and the demands of the task.  相似文献   
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