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31.
The influence of preparation time on ankle joint biomechanics during highly dynamic movements is largely unknown. The aim of this study was to evaluate the impact of limited preparation time on ankle joint loading during highly dynamic run-and-cut movements. Thirteen male basketball players performed 45°-sidestep-cutting and 180°-turning manoeuvres in reaction to light signals which appeared during the approach run. Both movements were executed under (1) an easy condition, in which the light signal appeared very early, (2) a medium condition and (3) a hard condition with very little time to prepare the movements. Maximum ankle inversion angles, moments and velocities during ground contact, as well as EMG signals of three lower extremity muscles, were analysed. In 180°-turning movements, reduced preparation time led to significantly increased maximum ankle inversion velocities. Muscular activation levels, however, did not change. Increased inversion velocities, without accompanying changes in muscular activation, may have the potential to destabilise the ankle joint when less preparation time is available. This may result in a higher injury risk during turning movements and should therefore be considered in ankle injury research and the aetiology of ankle sprains. 相似文献
32.
The objective of this study was to investigate the impact of cultural diversity on communication effectiveness with different communication styles and to apply the results in the field of user interface design for computer-based communication systems. The scope of this study was limited to the relationship between context and verbal/nonverbal communication, and also the relationship between power distance and communication interaction. The results indicated that high context people (HCP) had better communication effectiveness in comprehending nonverbal clues than low context people (LCP), while LCP had better communication effectiveness in verbal communication than their counterparts. It was also found that high power distance people (HPDP) could not communicate as effectively as low power distance people (LPDP) during communication with interaction, but there was no significant difference between HPDP and LPDP in dealing with communication without interaction. 相似文献
33.
34.
On a kayak ergometer, an accurate simulation of the athlete-paddle-kayak system kinematics is essential for analysing the relationship between technique and performance. The purpose of this study
was to establish a strong relationship between performances on flatwater and performances on an ergometer by means of propulsive
force measurement and drag models. Two trials were performed by 12 kayakers in which they were first timed over 250 m of flatwater
kayaking (the reference test) and were then asked to perform a trial of the same duration on the ergometer with the same perceived
physical exertion. Three techniques for measuring propulsive force and three drag models generated nine combinations, which
were all evaluated for their ability to estimate kayak velocity. For each combination, the distance covered by the athlete
on the ergometer was simulated. A kayakers’ ergometer ranking was based on the average velocity in the ergometer trial. Both
distance and ranking were compared to the on-water results. The simulation with the best combination of force measurement
and drag model gave an accurate estimate of distance (253 ± 10.5 vs. 250 m) and ranking compared to the reference test. 相似文献
35.
36.
This article is based on a pilot study investigating the representation of women in a sample of texts for citizenship education in the immediate post-Second World War era in England. The authors argue that existing research into the field of education for citizenship does not engage adequately with how the subject is taught in schools, and how citizenship education constructs the polity in line with normative and traditionalist assumptions about the role of women and men in society. By studying the texts of citizenship for the period 1940-66, the authors argue that researchers can, if they deploy a more critically engaged approach to the way in which notions of 'citizenship' and 'polity' are gendered, generate new questions and new understandings of how education for citizenship functions in schools. 相似文献
37.
Patrick R. Parsons 《广播与电子媒介杂志》2013,57(3):354-365
For the last 20 years, scholarly and popular accounts of the development of cable television have recounted the story of John Walson, Sr., who claimed to have started the first CATV system in June of 1948 in Mahanoy City, Pennsylvania. When Walson died in March of 1993, newspapers around the country credited him with starting the nation's first cable system and even “founding”; the industry. The claim, however, has always been clouded by questions and a lack of documentation. This paper reports the results of an investigation of the Walson story. It concludes that, as bright and promising as the Walson tale may be, it probably is not true. At the very least, the preponderance of evidence suggests that Walson got his start in the community antenna television business in late 1950, about the same time as many others around the country and, importantly, probably after another group of businessmen already had begun a system in Mahanoy City itself. 相似文献
38.
ABSTRACT With the support of Unicef and Unesco, the Romanian Ministry of Education has since 1993 been operating a programme to promote the educational and social integration of children and young people with special needs. In a comparatively short time the programme has grown from a pair of pilot projects to comprise a number of interactive elements which include a Joint European Project within the EU's TEMPUS programme, as well as provision for networking, and for describing, monitoring and generalizing experience of good practice. In this process a ‘philosophy’ of integration has developed which is appropriate to Romanian realities and which offers the possibility of an integration project to everyone concerned with special needs. The paper stresses the importance of the voluntary organizations and their new cooperative relationship with the institutions, and of the role of the universities in professional training. The paper ends with a discussion of the barriers and supports to integration, together with some conclusions about the significance and future of the programme. 相似文献
39.
Patrick Ainley 《教育政策杂志》2013,28(4):497-514
This paper argues that changes at all levels of education and training (i.e., learning) policy exemplify a new capitalist state formation. This has been aptly named by US political scientist Philip Bobbitt (2002) ‘the new market‐state’, particularly with reference to its administration or ‘governance’. It can be seen especially in the governance of education and training where a new centralized system of contracting or devolving provision to ‘non‐governmental agencies’ has all but replaced the previous ‘national system locally administered’ (Ainley, ). The latter typified the administration of the classic post‐war welfare state, which Bobbitt calls the ‘nation‐state’. Like the former welfare state, the new ‘market‐state’ is also a capitalist state and, therefore, also the means to rule for a persisting capitalist ruling class (Roberts, , pp. 169–192). The new state formation is, however, as different as the former welfare state was in turn from pre‐war capitalist state forms in England. This is particularly clear when the new ‘settlement’ of education and training, imposed by the 1988 Education and 1992 Further and Higher Education Acts, is contrasted with the former welfare state ‘settlement’ established by the 1944 Education Act. In conclusion, implications for opposition to the ‘new market‐state’ are discussed. 相似文献
40.
In 1994, the New South Wales Board of Studies, Australia, introduced three high level Distinction Courses for gifted and talented students: comparative literature, cosmology, and philosophy. All are offered by distance education but the cosmology course employs an interactive design model and an extensive communication system that differentiates it from the other two. This article explains the model and the way it is used in practice to organize, sequence and deliver the course. Discussion addresses ways in which the model might be used to design a wider range of courses for gifted and talented students. 相似文献