数字的未来在中国——2002国际数学家大会侧记

20 0 2国际数学家大会 (ICM ) ,于 2 0 0 2年 8月2 0 - 2 8日在中国北京举行。这次大会充满了“第一” :ICM第一次在一个发展中国家举行 ;第一次有举办国的最高领导人出席ICM的开幕式 ;许多出席大会的数学家是第一次来到中国 ;即使对那些以前曾来过中国的与会者 ,由于这个国家近年来的巨大变化 ,他们也觉得是到了一个新地方。中国的组织者的友好和热情 ,不仅反映了这个国家历史悠久的对学问和知识的尊重 ,也说明了他们已认识到加强中国的科学研究能力 ,对国家未来的发展有举足轻重的作用。“这是一次非常特别的ICM ,确实是绝无仅有的”…     

Public libraries,digital literacy and participatory culture

In recent years public libraries have experimented with user-generated or community-contributed content through the interactive tools of Web 2.0. For some commentators this not just establishes a new relationship between libraries and their publics, but signals the end of information hegemony and an ‘expert paradigm’. Such claims need to be treated with caution. This article argues that public library experiments with user-generated content can be more usefully analysed in the context of wider institutional mandates around literacy, civic engagement and access. This article critically examines some recent library developments in this field, with a particular focus on Australian libraries.     

The value and valuing of continuing professional development: current dilemmas,future directions and the case for action research

This paper explores and challenges the rationale for current, mainstream approaches to teachers’ continuing professional development (CPD) within schooling systems. Such approaches are significantly influenced by neoliberal and managerial pressures, evident in advocacy for generic, individualistic models of teacher learning, often focused on specific state-sanctioned domains. The paper draws upon a précis of recent action research literature, and empirical research from Sweden, to argue for an alternative paradigm, based on the practices and principles of participatory and collaborative action research. Action research is not presented as a simplistic ‘method’ which can be ‘applied’ regardless of context, but is explicitly focused on situated, specific, local sites. While more managerial and neoliberal practices can close down debates necessary for effecting real improvements in practice, evidence suggests action research, in its emancipatory iterations, enables a rich conception of educational practice which cannot be ‘managed’ into existence by a simplistic application of ‘what works.’     

Teaching Science Inquiry in Urban Contexts: The Role of Elementary Preservice Teachers’ Beliefs

This paper reports on a study of elementary preservice teachers’ inquiry-based practices, their efficacy beliefs, and the role beliefs had on two preservice teachers’ practices in urban classrooms. Results show inquiry-based practices can be cultivated through field-based experiences and preservice teachers’ efficacy beliefs, as it relates to practice in urban settings, are malleable. Specifically, personal efficacy beliefs about teaching science improved or were sustained for one cohort of preservice teachers. However, beliefs about students’ ability to learn science, that is outcome beliefs, were less stable. The results of two case studies show that science content knowledge was a factor in preservice teachers’ inquiry-based practices. However, why preservice teachers’ beliefs about student learning declined is less clear. More research is needed, along with follow-up data on teacher induction, to learn how preservice teachers’ beliefs impact urban students’ science education.     

English Premiership Academy knee injuries: lessons from a 5 year study

This study addresses the epidemiology of knee injuries in adolescent males. Data were collected prospectively from 41 Premiership soccer academies over a 5 year period from July 2000 to June 2005. A total of 12,306 player seasons were registered in the U9 to the U16 age categories with a total of 1750 recordable injuries specific to the knee joint. There was a mean incidence of 0.71 (95% confidence interval ± 0.05) knee injuries per player per year, and a median of 17 (inter-quartile range 9-38) training days and 2 (inter-quartile range 1-4) matches missed per knee injury. Knee injuries were found to be most common in the 14-16 year age group. Six hundred and nine (35% of total) injuries were classed as severe resulting in more than 28 days' absence. Injuries were more likely to be sustained in a competitive or match-play environment (862 or 52%) than in training (796 or 48%), and a non-contact mechanism was implicated in 823 (55%) of recorded cases. Peaks in injury numbers were seen in early season and subsequent to the winter break. Sprain was the most common diagnosis recorded, with the medial collateral ligament affected in 23% of all knee injuries. Knee injuries are common in elite youth footballers. In this uninsured age group, it could be argued that earlier medical intervention may reduce long-term damage to the immature skeleton.     

Inspiratory muscle warm-up and inspiratory muscle training: separate and combined effects on intermittent running to exhaustion

In the present study, we examined the independent and combined effects of an inspiratory muscle warm-up and inspiratory muscle training on intermittent running to exhaustion. Twelve males were recruited to undertake four experimental trials. Two trials (Trials 1 and 2) preceded either a 4-week training period of 1 × 30 breaths twice daily at 50% (experimental group) or 15% (control group) maximal inspiratory mouth pressure (PImax). A further two trials (Trials 3 and 4) were performed after the 4 weeks. Trials 2 and 4 were preceded by a warm-up: 2 × 30 breaths at 40% PImax. Pre-training PImax and distance covered increased (P < 0.05) similarly between groups after the warm-up (~11% and ~5-7% PImax and distance covered, respectively). After training, PImax increased by 20 ± 6.1% (P < 0.01; d = 3.6) and 26.7 ± 6.3% (P < 0.01; d = 3.1) when training and warm-up were combined in the experimental group. Distance covered increased after training in the experimental group by 12 ± 4.9% (P < 0.01; d = 3.6) and 14.9 ± 4.5% (P < 0.01; d = 2.3) when training and warm-up interventions were combined. In conclusion, inspiratory muscle training and inspiratory muscle warm-up can both increase running distance independently, but the greatest increase is observed when they are combined.