Time motion analysis of 2001 and 2002 super 12 rugby     

Duthie G  Pyne D  Hooper S 《Journal of sports sciences》2005,23(5):523-530

The aim of this study was to quantify movements of Super 12 rugby players in competition because information on elite rugby players' movements is unavailable. Players were categorized into forwards [front (n = 16) and back row (n = 15)] and backs [inside (n = 9) and outside backs (n = 7)] and their movements analysed by video-based time motion analysis. Movements were classified as rest (standing, walking and jogging) and work (striding, sprinting, static exertion, jumping, lifting or tackling). The total time, number and duration of individual activities were assessed, with differences between groups evaluated using independent sample t-tests (unequal variances), while differences between halves were assessed with paired sample t-tests. Forwards had 7:47 min:s (95% confidence limits: 6:39 to 8:55 min:s, P<0.01) more time in static exertion than backs, but backs spent 0:52 (0:34 to 1:09, P = 0.01) min:s more time sprinting than forwards, and had a 0.7 (0.3 to 1.2, P = 0.01) s longer duration of each sprint. Forwards spent 7:31 (5:55 to 9:08) min:s more time in work activities (P = 0.01) and had 2.1 (1.3 to 2.8) s longer work durations (P<0.01) than backs. The results indicate frequent short duration (<4 s) work efforts followed by moderate duration (<20 s) rest for forwards, and extended (>100 s) rest duration for backs. High-intensity efforts involved static exertion for forwards (mean +/- standard deviation frequency = 80 +/- 17) and sprinting for backs (27 +/- 9). In conclusion, after nearly a decade since becoming professional, elite rugby union is still characterized by highly intense, intermittent movement patterns and marked differences in the competition demands of forwards and backs.  相似文献   

Back to the basics—An introductory survey     

Carl Bognar 《Interchange》1976,7(4):1-2

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The Impact of Federal Aid on Counselor Education     

Carl McDaniels 《Counselor Education & Supervision》1967,6(Z3):263-274

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Sumner, Pareto, and Educational Constants     

Carl M. Tausig 《Educational theory》1969,19(3):223-235

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Temporal trends in 6-minute walking distance for older Japanese adults between 1998 and 2017     

Grant R. Tomkinson  Tetsuhiro Kidokoro  Trevor J. Dufner  Shingo Noi  John S. Fitzgerald  Holly M. Brown-Borg 《运动与健康科学(英文)》2021,10(4):462

BackgroundThe 6-minute walking distance (6MWD) is an excellent measure of both functional endurance and health. The primary aim of this study was to estimate temporal trends in 6MWD for older Japanese adults between 1998 and 2017; the secondary aim was to estimate concurrent trends in body size (i.e., height and mass) and self-reported participation in exercise/sport.MethodsAdults aged 65–79 years were included. Annual nationally representative 6MWD data (n = 103,505) for the entire period were obtained from the Japanese Ministry of Education, Culture, Sports, Science and Technology. Temporal trends in means (and relative frequencies) were estimated at the gender–age level by best-fitting sample-weighted linear/polynomial regression models, with national trends estimated by a post-stratified population-weighting procedure. Temporal trends in distributional variability were estimated as the ratio of coefficients of variation.ResultsBetween 1998 and 2017 there was a steady, moderate improvement in mean 6MWD (absolute = 45 m (95% confidence interval (95%CI): 43–47); percent = 8.0% (95%CI: 7.6%–8.4%); effect size = 0.51 (95%CI: 0.48–0.54)). Gender- and age-related temporal differences in means were negligible. Variability in 6MWD declined substantially (ratio of coefficients of variation = 0.89, 95%CI: 0.87–0.92), with declines larger for women compared to men, and for 75–79-year-olds compared to 65–74-year-olds. Correspondingly, there were moderate and negligible increases in mean height and mass, respectively, and negligible increases in the percentage who participated in exercise/sport at least 3 days per week and at least 30 min per session.ConclusionThere has been a steady, moderate improvement in mean 6MWD for older Japanese adults since 1998, which is suggestive of corresponding improvements in both functional endurance and health. The substantial decline in variability indicates that the temporal improvement in mean 6MWD was not uniform across the distribution. Trends in 6MWD are probably influenced by corresponding trends in body size and/or participation in exercise/sport.  相似文献   

Analysis of a laminar-flow diffusional mixer for directed self-assembly of liposomes     

Matthew J. Kennedy  Harold D. Ladouceur  Tiffany Moeller  Dickson Kirui  Carl A. Batt 《Biomicrofluidics》2012,6(4)

The present work describes the operation and simulation of a microfluidic laminar-flow mixer. Diffusive mixing takes place between a core solution containing lipids in ethanol and a sheath solution containing aqueous buffer, leading to self assembly of liposomes. Present device architecture hydrodynamically focuses the lipid solution into a cylindrical core positioned at the center of a microfluidic channel of 125 × 125-μm² cross-section. Use of the device produces liposomes in the size range of 100–300 nm, with larger liposomes forming at greater ionic strength in the sheath solution and at lower lipid concentration in the core solution. Finite element simulations compute the concentration distributions of solutes at axial distances of greater than 100 channel widths. These simulations reduce computation time and enable computation at long axial distances by utilizing long hexahedral elements in the axial flow region and fine tetrahedral elements in the hydrodynamic focusing region. Present meshing technique is generally useful for simulation of long microfluidic channels and is fully implementable using comsol Multiphysics. Confocal microscopy provides experimental validation of the simulations using fluorescent solutions containing fluorescein or enhanced green fluorescent protein.  相似文献   

EditorialKeeping information centre stage amid changing scenery     

Maria J Grant 《Health information and libraries journal》2010,27(2):91-92

With conference season upon us, consideration is given to the importance of subject‐specific and library association conferences. The biennial Health Libraries Group (HLG) conference meets both these criteria and takes place in Greater Manchester in July. The conference provides an opportunity for peer‐to‐peer learning, identifying new trends and professional rejuvenation. An open invitation is given to attend the Health Information and Libraries Journal‘Writing for Publication’ workshop at the HLG conference. An overview of three bursaries available from the Health Libraries Group and Library and Information Research, both groups of the UK Chartered Institute of Library and Information Professionals (CILIP) is provided. The bursaries offer opportunities to cover the costs of registration and travel expenses to national and international conference.  相似文献   

Challenges to Institutionalizing Participatory Extension: The Case of Farmer Livestock Schools in Vietnam     

Thai Thi Minh  Carl Erik Schou Larsen  Andreas Neef 《The Journal of Agricultural Education and Extension》2013,19(2):179-194

Abstract

Purpose: The objective of this article is to analyze the introduction of participatory extension approaches (PEA) in the predominantly supply-driven, hierarchical Vietnamese extension system. Drawing on the case of the so-called Farmer Livestock School (FLS) concept, the authors investigate the potential and challenges of scaling up and out the FLS/PEA principles of participatory training methods, encompassing intensive and interactive training sessions, group-based sharing of experience, practical learning, and learning-by-doing processes.

Design/Methodology/Approach: The article is based on data collected and synthesized from 36 pilot communes from 2000 to 2007 and draws on the extensive insider experience of two of its authors during their work for a DANIDA-funded livestock project.

Findings: At the micro-scale and with external support, FLS has been a successful experiment of using participatory extension approaches in farmer training and extension in the livestock sector. Yet, possibilities of scaling up and institutionalizing FLS remain a challenge given the capacity and resource limitations and the resistance at various levels within the Vietnamese extension system.

Practical Implications: The starting point for successfully institutionalizing participatory extension approaches should be to assess the existing system's root problems and capacities and then gradually and systematically introduce institutional innovations rather than aiming at a complete overhaul of a system that may result in the creation of a parallel universe.

Originality/Value: The FLS project provided a unique opportunity to study the enabling and constraining factors of institutionalizing participatory extension approaches in a traditionally top-down oriented extension system beyond the immediate duration of an externally orchestrated project.  相似文献   

Young offenders in New South Wales,Australia and the need for remedial sexual health education     

Grant Mistler  Kristie Kirkwood  Emily Potter 《Sex education》2013,13(4):439-449

The 2005–2008 Australian National Sexually Transmissible Infections Strategy identifies young people as a key target group in need of sexual health education, screening and management. For young people who are in contact with the New South Wales (NSW) juvenile justice system, a dire need for remedial sexual health education exists. NSW young offenders indicate initiation of sexual activity at a younger age than their peers, higher numbers of sexual partners, infrequent condom use and higher rates of sexually transmitted infections. They also report family instability, poor accessing of health services, and low school attendance: all factors that result in poor sexual knowledge and health outcomes. An examination into the cognitive profile of these young offenders indicates remedial education for this group may require a dual approach in order to redress their specific circumstances and needs. The first approach should target young offenders who simply missed out on stages of sexual health information in the school curriculum. The second approach requires a tailored teaching methodology more appropriate for a group with atypical cognitive profiles. Both approaches need to engage an educative model that acknowledges that these disadvantaged young people are already sexual active; and that many did not have the benefit of an informed or consensual decision making processes. More importantly, the tailoring of a sexual health education program to these young people needs to resonate with teaching to a cognitively distinctive population who have experienced higher than usual rates of alcohol and other drugs abuse, and higher than usual episodes of physical and emotional abuse and neglect.  相似文献   

Fact or folklore? Exploring “Myths” about outdoor education accidents: Some evidence from New Zealand     

Grant Davidson 《Journal of Adventure Education & Outdoor Learning》2013,13(1):13-37

Abstract

This paper provides analysis on the frequency and nature of accidents and near accidents that have occurred in larger outdoor education centres in New Zealand. This is the first time that information of this type has been collected and analysed in New Zealand.

All 25 of the known outdoor education organisations employing three or more full-time staff were invited to participate in a study that would extract and review data from their records about accidents and near accidents. Twelve agreed to participate.

The data collected is analysed in the context of various myths that are often heard referred to by the outdoor education community. These are that: 1. i.focusing on minor incidents prevents major accidents occurring,

2. ii.selecting activities with high perceived risk but low real risk reduces exposure to accidents,

3. iii.more accidents occur while under the supervision of male rather than female instructors,

4. iv.accidents are more likely in the afternoon than the morning, and

5. v.outdoor education is dangerous compared to other risks in life.

The results lend some support to the factual nature of “myths” iii and iv, but help consign “myths” i, ii and v to the category of folklore. These results provide insights that may assist in developing strategies to improve safety in outdoor education.

In view of the current size and importance of the outdoor education sector in New Zealand and its likely future growth, one of the main recommendations arising from this study is for the establishment of a national system to formally record and report incidents and accidents.  相似文献