Acceleratory match-play demands of a Super Rugby team over a competitive season

The match-play demands of rugby union have increased over time, and these demands should be quantified so as to provide a basis for optimal player loading during training. The primary aim of this article was to quantify accelerations, decelerations, impacts and aggregated body demands during the first half of match-play in a Super Rugby team. The secondary aim was to determine whether these characteristics are position-specific. Thirty-three players were monitored for 14 matches using global positioning system units with inbuilt microtechnology. Players were grouped according to positional roles and data were analysed for those who completed the entire duration of the first half of a given match. Forwards sustained more (d = 0.44) high-intensity impacts and greater (d = 0.26) aggregated body demands, while backs had more moderate (d = 0.55) and heavy accelerations (d = 0.76), and moderate (d = 0.23) and heavy decelerations (d = 0.54). These differences suggest that conditioning and recovery strategies should reflect the physical demands placed on players in different playing positions. Forwards should be conditioned with a focus on impacts and require longer recovery for the same duration of playing time, whereas conditioning for backs should emphasise rapid accelerations and decelerations.     

Classroom and Worksheet Activities across the Curriculum

This article shows how teachers can create useful classroom activities to underpin data‐handling methods for pupils aged 7–19. We use the data base of responses from the UK CensusAtSchool project that are available for pupils and teachers.     

Real-time,evidence-based medicine instruction: a randomized controlled trial in a neonatal intensive care unit

Purpose: The study assesses potential for improving residents'' evidence-based medicine searching skills in MEDLINE through real-time librarian instruction.Subjects: Ten residents on a rotation in a neonatal intensive care unit participated.Methodology: Residents were randomized into an instruction and a non-instruction group. Residents generated questions from rounds and searched MEDLINE for answers. Data were collected through observation, search strategy analysis, and surveys. Librarians observed searches and collected data on questions, searching skills, search problems, and the test group''s instruction topics. Participants performed standardized searches before, after, and six-months after intervention and were scored using a search strategy analysis tool (1 representing highest score and 5 representing lowest score). Residents completed pre- and post-intervention surveys to measure opinions about MEDLINE and search satisfaction.Results: Post-intervention, the test group formulated better questions, used limits more effectively, and reported greater confidence in using MEDLINE. The control group expressed less satisfaction with retrieval and demonstrated more errors when limiting. The test and control groups had the following average search scores respectively: 3.0 and 3.5 (pre-intervention), 3.3 and 3.4 (post-intervention), and 2.0 and 3.8 (six-month post-intervention).Conclusion: Data suggest that measurable learning outcomes were achieved. Residents receiving instruction improved and retained searching skills six-months after intervention.     

利用单摆原理的设计性实验

物理是一门以实验为基础的学科.设计性实验对于考查学生综合运用所学知识,解决实际问题,提高学生的综合素质和科学素养;培养学生的创新意识和创造能力,以适应未来社会对人才的要求,具有积极的意义.在2001年高考说明中,明确指出"能灵活地运用已学过的物理理论,实验方法和实验仪器去处理问题."下面举例说明.     

探究圆形磁铁的磁极

1观察现象,提出问题我们知道磁铁有南北两个磁极,同名磁极相互排斥,异名磁极相互吸引。一个磁体无论被如何分割,南北两极总是同时存在的,磁单极子迄今还尚未发现。扬声器中的磁铁大多是圆形的,该磁铁外形如图1。它有四个面,我们姑且称之为正面、反面、外侧和内侧。用这种磁铁做     

实时内存数据库存储结构及数据安置策略

给出了实时内存数据库的定义、存储结构和数据特征,在此基础上,提出了一个合理的数据安置策略,引入了存储类的概念,使系统能够有效利用有限的内存空间,提高系统的性能。     

CensusAtSchool 2000

This article covers the development of an ambitious Internet‐based project to conduct a simple census of the schoolchildren of England and Wales linked to the 2001 UK National Census.