浙江的一切让我折服

我来自美国中部印第安那州的安德森市,一个人与人之间相处非常友善的城市。为商谈我的家乡安德森市和浙江杭州市余杭区建立姐妹城市,我已经两次访问余杭。今年10月,我将第三次访问浙江省。访问浙江的经历给我留下了难忘的记忆。     

Conditions,processes and consequences of technology use: a case study

Abstract

The conditions, processes and consequences of technology implementation were explored in order to develop a holistic view of technology use in a typical elementary school (ages 6-11 years). This qualitative case study employed a symbolic interactionist conceptual framework, an interpretivist research paradigm and analytic induction strategies. Assertions generated from the process of analytic induction suggest that even when conditions appear ripe for transformational uses of technology, these uses often do not occur. The study raises questions about whether school-wide transformational uses of technology can occur without an organized reform effort and whether the conditions for transformational use of technology advocated in the literature are sufficient to facilitate such use. The study also supports the need to consider stages of adoption when planning for technology integration within a school and adds another dimension to the question of whether constructivist teaching strategies enable transformative uses of technology or whether the transformational uses of technology lead to more constructivist tendencies.     

How Parent Perceptions Relate to Elementary Children’s Portable Technology Use by Gender and Grade Level

This study examined how parents' reports of children’s technology use in the home varies by a child’s gender or grade level. Framed by technology adoption models, this mixed-method study gathered parent reports of their elementary child’s use of portable technology for entertainment and learning in the home, collected from 120 surveys and 13 individual interviews with survey respondents. Results across the four 2×2 ANOVAs yielded three significant main effects: gender and entertainment devices, gender and entertainment apps, grade level and learning apps. No significant effects were found among any of the interaction variables or within the ANOVA summary for learning devices. Interview data revealed girls are interested in reading with Kindle, whereas parents are reluctant to provide boys with portable technology because of their preference to play games. Strategies are provided for teachers, support specialists, and parents to improve how children use technology. Implications for app developers are suggested.     

Upper primary boys' and girls' interests in science: have they changed since 1980?

Over the years concerns that many students have not been opting to study science further than required, and not progressing to scientific careers, have been partly related to low levels of interest and negative attitudes developed quite early in life. Of particular concern have been the differences observed between girls and boys, especially the negative attitudes of many girls to the physical sciences, where findings from many different international studies have been reasonably consistent. This paper reports on a 1997 study which repeated a 1980 survey of the attitudes of Year 7 South Australian primary school students. Given continuing approaches to improving science education, especially for girls, the aim was to discover whether the overall levels of interest, and the sex differences, detected in 1980 had changed in 1997. The results show that, while there have been some changes, these are not always in the desired direction. Some implications of the findings are discussed.     

Movement patterns in cricket vary by both position and game format

Abstract

We compared the movement patterns of cricketers in different playing positions across three formats of cricket (Twenty20, One Day, multi-day matches). Cricket Australia Centre of Excellence cricketers (n = 42) from five positions (batting, fast bowling, spin bowling, wicketkeeping, and fielding) had their movement patterns (walk, jog, run, stride, and sprint) quantified by global positioning system (GPS) technology over two seasons. Marked differences in movement patterns were evident between positions and game formats, with fast bowlers undertaking the greatest workload of any position in cricket. Fast bowlers sprinted twice as often, covered over three times the distance sprinting, with much smaller work-to-recovery ratios than other positions. Fast bowlers during multi-day matches covered 22.6 ± 4.0 km (mean ± s) total distance in a day (1.4 ± 0.9 km in sprinting). In comparison, wicketkeepers rarely sprinted, despite still covering a daily total distance of 16.6 ± 2.1 km. Overall, One Day and Twenty20 cricket required ～50 to 100% more sprinting per hour than multi-day matches. However, multi-day cricket's longer duration resulted in 16–130% more sprinting per day. In summary, the shorter formats (Twenty20 and One Day) are more intensive per unit of time, but multi-day cricket has a greater overall physical load.     

Movement patterns and physical strain during a novel,simulated cricket batting innings (BATEX)

Abstract

A simulated cricket batting innings was developed to replicate the physical demands of scoring a century during One-Day International cricket. The simulated innings requires running-between-the-wickets across six 5-over stages, each of 21 min duration. To validate whether the simulated batting innings is reflective of One-Day International batting, movement patterns were collected using a global positioning system (GPS) and compared with previous research. In addition, indicators of physical strain were recorded (heart rate, jump heights, sweat loss, tympanic temperature). Nine club cricketers (mean ± s: age 20 ± 3 years; body mass 79.5 ± 7.9 kg) performed the simulated innings outdoors. There was a moderate trend for distance covered in the simulated innings to be less than that during One-Day batting (2171 ± 157 vs. 2476 ± 631 m · h^?1; effect size = 0.78). This difference was largely explained by a strong trend for less distance covered walking in the simulated innings than in One-Day batting (1359 ± 157 vs. 1604 ± 438 m · h^?1; effect size = 1.61). However, there was a marked trend for distance covered both striding and sprinting to be greater in the simulated innings than in One-Day batting (effect size > 1.2). Practically, the simulated batting innings may be used for match-realistic physical training and as a research protocol to assess the demands of prolonged, high-intensity cricket batting.     

Effect of precooling and acclimation on repeat-sprint performance in heat

Abstract

This study determined whether precooling would have an additive effect on repeat-sprint cycling performance in heat following partial acclimation. Ten males completed three trials; Pre Acclimation (Pre Acc) and two Post Acclimation trials, one with precooling (ice jacket and slushy; Post Acc +PC) and another without (Post Acc). Trials consisted of a 30-min baseline period followed by a 70-min repeat-sprint protocol in ～35°C and 60% relative humidity. Separating pre and post trials were five heat acclimation sessions. Although no significant differences were found for performance variables, inferential statistical analysis resulted in moderate effect sizes, which suggested more work (J · kg^?1) was performed in Post Acc compared with Pre Acc. Further, ‘possible’ and ‘very likely’ benefits were found for every performance variable for Post Acc compared with Pre Acc, while ‘possible’ benefits were found for Post Acc, compared with Post Acc +PC, for peak power output (W and W · kg^?1). Moderate to strong effect sizes suggested lower core temperatures in both post acclimation trials compared with Pre Acc. Sweat loss was significantly higher (P < 0.05; 23.1%) in Post Acc +PC compared to other trials. In conclusion, no additional performance enhancement was seen when partially acclimated individuals precooled prior to repeat-sprint performance in heat.     

Workload and injury incidence in elite football academy players

ABSTRACT

The aim of this study was to prospectively analyse the relationship between workloads and injury in elite football academy players. Elite football academy players (n = 122) from under-19 (U19) and under-21 (U21) of a professional football team competing in UEFA European Cups were followed during 5 seasons. Injuries were collected and absolute workload and workload ratios (4-weeks, 3-weeks, 2-weeks and week-to-week) calculated using a rolling days method with the help of the session Rate of Perceived Exertion. There was no association between absolute workload or workload ratio with the injury incidence in the U19. In the U21, the level of cumulative absolute workloads during 3-weeks (RR = 1.39, p = 0.026) and during 4-weeks (RR = 1.40, p = 0.019) were associated with an increase in injury. There was no association between workload ratio and injury in U21. The significant link between high cumulated 3-weeks and 4 weeks workloads and injury in U21 confirmed the requirement to monitor the internal subjective workload in U21 in order to prevent injury. Further studies exploring the relationships between workload and injury are required in football academy.     

Acting global,thinking local: ‘Liquid imperialism’ and the multiple meanings of the 1954 British Empire & Commonwealth Games

Challenging earlier scholarship that has suggested that the Commonwealth Games contributed unproblematically to imperial and commonwealth unity, this article explores the multiple, and conflicting, contemporary local meanings of the 1954 British Empire & Commonwealth Games held in Vancouver, Canada. In addition to emphasising the sporting and economic dimensions of the Games, the article introduces the concept of ‘liquid imperialism’ to highlight the complexity of Canada's imperial connection in the post-war era. By examining not only official pronouncements, but also oppositional voices and the manner in which the Games were appropriated by a number of competing interests, the article argues for a more complex understanding of the Games' cultural influence while examining the nature of Canada's imperial connection during the middle of the 20th century.     

Controlling Variables: testing a programme for teaching a general solution strategy

Detail is provided of a theoretically based teaching programme designed to induce students to construct a mental scheme in which experimental design and natural experiments (Kuhn & Brannock, 1977) are understood as facets of the same problem, and which incorporates a general solution procedure applicable to both. A pre‐test‐post‐test‐delayed post‐test controlled examination of the efficacy of the programme is described using grade 8 students as subjects. The results show a highly significant post‐test achievement increase by the experimental group over the control, which is retained in the delayed post‐test. Evidence is also presented indicating a probable decrease in performance decalage between planned and natural experiments by the experimental grade 8 group.