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31.
A.J. Dawson 《Asia-Pacific Journal of Teacher Education》1994,22(1):59-67
Teacher education programs around the globe are undergoing consolidation as the result of extensive, critical reviews. The concepts of faculty associates, school associates, module structure, research agenda and long practica, which were incorporated initially within the Professional Development Program (PDP) at Simon Fraser University (Vancouver, Canada) over 25 years ago, are offered as viable ways of addressing concerns, for greater school/university collaboration and more meaningful practica. Evidence is provided from a recent external review (British Columbia College of Teachers, 1991) regarding the impact of these program attributes on the PDP student teachers, as well as on the faculty members and faculty associates working with them. 相似文献
32.
This paper presents a reflective account of a science teacher’s endeavours to use the referent of critical constructivism
to transform her pedagogical practices. The context of her action research was a Year 10 Bioethics unit taught at an independent
girls’ school in Perth, Western Australia. Students were provided with opportunities to engage in open and critical discourses;
many did, but a few were unwilling to participate in accordance with the teacher’s intentions. We illustrate the disruptive
influence of these “dissident” students and explore the reasons for their unwillingness to suspend their disbelief in a new
way of knowing (and of being) that involves a radical change in the role of language in the classroom. We conclude with recommendations
for epistemological pluralism and the careful use of critical discourse for re-negotiating teaching and learning roles and
creating conditions for open discourse to flourish. 相似文献
33.
34.
Joseph C. DiPietro Wendy Drexler Kathryn Kennedy Vasa Buraphadeja Feng Liu Kara Dawson 《TechTrends》2010,54(1):25-32
This article focuses on the experiences of seven Ph.D. students implementing a wiki to collaboratively prepare for qualifying
examinations in the educational technology program at a large southeastern university. Concomitant study for such a rigorous
examination is rare, and the trials and tribulations of the group are described in detail. Specific guidelines highlighting
effective preparation options for qualifying exams are often elusive, and, as such, this article explores current research
related to collaborative preparation and mentoring, as well as the qualifying examination process in total, in hopes of adding
to the scientific body of knowledge related to these subjects. It also offers best practice strategies, suggests possible
technology tips regarding wiki implementation, and seeks to better scaffold future scholars and/or mentors seeking to effectively
participate in or plan for collaborative qualifying examination preparation. 相似文献
35.
Daniel J Hiscock Brian Dawson Michael Clarke Peter Peeling 《Journal of sports sciences》2018,36(2):191-197
This study examined the influence of differing volume load and intensity (%1 repetition maximum[%1RM]) resistance exercise workouts on session rating of perceived exertion (sRPE) countermovement jump (CMJ) performance and endocrine responses. Twelve participants performed a workout comprising four exercises (bench press, back squat, deadlift and prone bench pull) in randomised order as either power (POW); 3 sets × 6 repetitions at 45%1RM × 3 min inter-set rest, strength (ST); 3 sets × 3 repetitions at 90%1RM × 3 min inter-set rest, or hypertrophy (HYP); 3 sets × 10 repetitions at 70%1RM × 1 min inter-set rest in a randomised-crossover design. CMJ performance and endocrine responses were measured immediately pre-, post-, 12, 24, 48 and 72 h post-exercise. POW sRPE (3.0 ± 1.0) was lower than ST (4.5 ± 1.0) (P = 0.01), and both were lower than HYP (8.5 ± 1.0) (P = 0.01). Duration of CMJ decrement was longer (P ≤ 0.05) for HYP (72 h) compared to POW (12 h) and ST (24 h). Testosterone concentration was greater (P ≤ 0.05) immediately post-exercise in HYP compared to POW and ST. In conclusion, less inter-set rest, greater volume load and intensity (%1RM) may increase sRPE, duration of CMJ performance decrement and testosterone responses in resistance exercise. 相似文献
36.
Barthelemy Delecroix Alan McCall Brian Dawson Serge Berthoin 《European Journal of Sport Science》2018,18(9):1280-1287
Purpose: The aim of this study was to analyse the relationship between absolute and acute:chronic workload ratios and non-contact injury incidence in professional football players and to assess their predictive ability. Methods: Elite football players (n?=?130) from five teams competing in European domestic and confederation level competitions were followed during one full competitive season. Non-contact injuries were recorded and using session rate of perceived exertion (s-RPE) internal absolute workload and acute:chronic (A:C) workload ratios (4-weeks, 3-weeks, 2-weeks and week-to-week) were calculated using a rolling days method. Results: The relative risk (RR) of non-contact injury was increased (RR?=?1.59, CI95%: 1.18–2.15) when a cumulative 4-week absolute workload was greater than 10629 arbitrary units (AU) in comparison with a workload between 3745 and 10628?AU. When the 3-week absolute workload was more than 8319?AU versus between 2822 and 8318?AU injury risk was also increased (RR=?1.46, CI95% 1.08–1.98). Injury incidence was higher when the 4-week A:C ratio was <0.85 versus >0.85 (RR?=?1.31, CI95%: 1.02–1.70) and with a 3-week A:C ratio >1.30 versus <1.30 (RR?=?1.37, CI95%: 1.05–1.77). Importantly, none of the A:C workload combinations showed high sensitivity or specificity. Conclusions: In elite European footballers, using internal workload (sRPE) revealed that cumulative workloads over 3 and 4 weeks were associated with injury incidence. Additionally, A:C workloads, using combinations of 2, 3 and 4 weeks as the C workloads were also associated with increased injury risk. No A:C workload combination was appropriate to predict injury. 相似文献
37.
Georgina L. Kent Brian Dawson Gregory R. Cox Louise M. Burke Annette Eastwood Kevin D. Croft 《Journal of sports sciences》2018,36(11):1204-1211
This investigation examined the effect of beetroot juice (BR) supplementation, a source of dietary nitrate (NO3?), on cycling time-trial (TT) performance and thermoregulation in the heat. In a double-blind, repeated-measures design, 12 male cyclists (age 26.6 ± 4.4 years, VO2peak 65.8 ± 5.5 mL.kg?1.min?1) completed four cycling TTs (14 kJ.kg?1) in hot (35°C, 48% relative humidity) and euthermic (21°C, 52%) conditions, following 3 days supplementation with BR (6.5 mmol NO3? for 2 days and 13 mmol NO3? on the final day), or NO3–depleted placebo (PLA). Salivary NO3? and nitrite, core (Tc) and mean skin temperature (Tsk) were measured. Salivary NO3? and nitrite increased significantly post-BR supplementation (p < 0.001). Average TT completion time (mm:ss) in hot conditions was 56:50 ± 05:08 with BR, compared with 58:30 ± 04:48 with PLA (p = 0.178). In euthermic conditions, average completion time was 53:09 ± 04:35 with BR, compared with 54:01 ± 04:05 with PLA (p = 0.380). The TT performance decreased (p < 0.001), and Tc (p < 0.001) and Tsk (p < 0.001) were higher in hot compared with euthermic conditions. In summary, BR supplementation has no significant effect on cycling TT performance in the heat. 相似文献
38.
Matt Spencer Steven Lawrence Claire Rechichi David Bishop Brian Dawson Carmel Goodman 《Journal of sports sciences》2013,31(9):843-850
Limited information exists about the movement patterns of field-hockey players, especially during elite competition. Time–motion analysis was used to document the movement patterns during an international field-hockey game. In addition, the movement patterns of repeated-sprint activity were investigated, as repeated-sprint ability is considered to be an important fitness component of team-sport performance. Fourteen members of the Australian men's field-hockey team (age 26±3 years, body mass 76.7±5.6?kg, [Vdot]O2max 57.9±3.6?ml?·?kg?1?·?min?1; mean±s) were filmed during an international game and their movement patterns were analysed. The majority of the total player game time was spent in the low-intensity motions of walking, jogging and standing (46.5±8.1, 40.5±7.0 and 7.4±0.9%, respectively). In comparison, the proportions of time spent in striding and sprinting were 4.1±1.1 and 1.5±0.6%, respectively. Our criteria for ‘repeated-sprint’ activity (defined as a minimum of three sprints, with mean recovery duration between sprints of less than 21?s) was met on 17 occasions during the game (total for all players), with a mean 4±1 sprints per bout. On average, 95% of the recovery during the repeated-sprint bouts was of an active nature. In summary, the results suggest that the motion activities of an elite field-hockey competition are similar to those of elite soccer, rugby and Australian Rules football. In addition, the investigation of repeated-sprint activity during competition has provided additional information about the unique physiological demands of elite field-hockey performance. 相似文献
39.
Martyn John Binnie Brian Dawson Mark Alexander Arnot Hugh Pinnington Grant Landers Peter Peeling 《Journal of sports sciences》2013,31(11):1001-1012
AbstractThis study compared the use of sand and grass training surfaces throughout an 8-week conditioning programme in well-trained female team sport athletes (n = 24). Performance testing was conducted pre- and post-training and included measures of leg strength and balance, vertical jump, agility, 20 m speed, repeat speed (8 × 20 m every 20 s), as well as running economy and maximal oxygen consumption (VO2max). Heart rate (HR), training load (rating of perceived exertion (RPE) × duration), movement patterns and perceptual measures were monitored throughout each training session. Participants completed 2 × 1 h conditioning sessions per week on sand (SAND) or grass (GRASS) surfaces, incorporating interval training, sprint and agility drills, and small-sided games. Results showed a significantly higher (P < 0.05) HR and training load in the SAND versus GRASS group throughout each week of training, plus some moderate effect sizes to suggest lower perceptual ratings of soreness and fatigue on SAND. Significantly greater (P < 0.05) improvements in VO2max were measured for SAND compared to GRASS. These results suggest that substituting sand for grass training surfaces throughout an 8-week conditioning programme can significantly increase the relative exercise intensity and training load, subsequently leading to superior improvements in aerobic fitness. 相似文献
40.
Percy M. Dawson 《Research quarterly for exercise and sport》2013,84(2):95-101
Abstract The purpose of this study was to examine the strength-decrement fatigue effects in 14 muscle groups of the trunk and lower extremities resulting from a sub-maximal treadmill run at seven miles per hour for a period of ten minutes on a horizontal plane. Only two muscle groups, the hip outward rotators and the trunk flexors, were fatigued sufficiently to cause a significant strength decrement; a third muscle group, the knee flexors, had a loss in mean strength which approached the .05 level of confidence. 相似文献