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The present study aimed to investigate positional differences in 744 high-level soccer players, aged 8 to 18 years. Players were assigned to six age groups (U9–U19) and divided into four playing positions (goalkeeper (GK), defender (DEF), midfielder (MF) and attacker (ATT)). MANOVA and effect sizes were used to examine anthropometrical and functional characteristics between all positions in all age groups. The main findings of the study were that GKs and DEFs were the tallest and heaviest compared with MFs and ATTs in all age groups. Further, between U9–U15, no significant differences in functional characteristics were found, except for dribbling skill, which MFs performed the best. In the U17–U19 age groups, ATTs seemed to be the most explosive (with GKs), the fastest and the more agile field players. These results suggest that inherent physical capacities (i.e., speed, power, agility) might select players in or reject players from an attacking position, which is still possible from U15–U17. Apparently, players with excellent dribbling skills at younger age are more likely to be selected to play as a MF, although, one might conclude that the typical physical characteristics for different positions at senior level are not yet fully developed among young soccer players between 8 and 14 years.  相似文献   
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The instructor in a course in German writing offered electronically at the University of Konstanz in Germany to students at the Alexandru Ioan Cuza University of Ias¸i describes the course. He has used it to teach different styles of writing interactively and to initiate his students in the use of the computer and the Web for the undertaking of research in German literature. He has attempted to structure and to operate his course in such a way as to bring the special characteristics of on-line teaching and learning to the fore and not simply to replicate a traditional course on-line, a frequent situation with on-line teaching and learning.  相似文献   
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This empirical study finds support for the hypothesis that participation in a special residential education programme enhances facets of pupils’ environmental perception. A 4-day extra-curricular educational unit with a cognitive outdoors focus (established in a nature centre in France) was surveyed by using a two stage sampling design in a pre-post-treatment evaluation; the post-test was delayed for a one-month period after participation. All selected participating pupils (n=151) responded twice to the same perception questionnaire. The factorial structure of this questionnaire had been previously developed using a large European sample (n=4500) and separately validated in a smaller French pupil sample (n=900). The matched-pair pre-post-test survey showed significant differences in two of the five primary factors; both of them covered utilitarian preferences and scored in a way which indicated an increase in sensitivity to the environment. A pre-post-tested control group (n=78) revealed no significant difference. Possible reasons for the partial shift in primary factors are discussed, including a consideration of two related studies (in Germany and Switzerland) which were both monitored by the same measurement instrument.  相似文献   
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This paper describes, by focusing on factor analytic structures, pupils’ reactions towards the utilisation and preservation of nature. A previously hypothesised model based on these two domains (comprised of 5 primary factors) was shown to be valid for four different Western European pupil samples: CH, D, DK, IRL. The empirical basis of this present paper comprises a survey of about 900 French pupils of both genders aged between 11 and 16 years from rural areas who responded to a paper-and-pencil questionnaire. Data from the remaining European samples added some 4000 respondents based on the same objective test each. The purpose of the present study was five-fold: Firstly, to test and confirm the hypothesised primary and secondary factor structure for the combined data set. Secondly, to apply the methods of linear structural relationship analysis to test the existence of two higher-order factors (the domains: “Preservation” and “Utilisation”). Thirdly, to investigate any age or gender effect in the primary factors. Fourthly, to provide an age-adjusted empirical instrument for evaluation purposes of educational programmes featuring conservation and environmental protection. Finally, to compare the means within-region factor scores in anticipation of substantial between-region differences. These differences followed a rather consistent pattern supporting the interpretation that “utilising” nature is negatively correlated with positive environmental reactions.  相似文献   
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This paper reports the findings from a survey conducted in Australia to explore current practices relating to knowledge management (KM) and intellectual capital (IC). A systematic approach in the form of the intellectual capital web guided the research. Findings revealed that KM was perceived to be more about developing knowledge culture than about managing organisational processes and structure. IC was perceived to be more about human capital than about customer capital and organisational capital. It can therefore be concluded that human capital holds the greatest importance for KM and IC. However, when facilitators for knowledge creation and knowledge sharing were rated, organisation structure was perceived to be more important than organisational culture and information technology. For KM practices, participants indicated that more attention was paid to training and developing employees and less to measurement and reward and incentive issues. The importance of aligning the management of IC and KM was perceived to be more important than the difficulty of doing so.  相似文献   
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