Chance regained: David Albert’s oeuvre revisited     

Kerry McKenzie 《Metascience》2016,25(1):51-55

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The acute testosterone,growth hormone,cortisol and interleukin-6 response to 164-km road cycling in a hot environment     

Jakob L. Vingren  Ronald G. Budnar Jr.  Amy L. McKenzie  Anthony A. Duplanty  Hui-Ying Luk  Danielle E. Levitt 《Journal of sports sciences》2016,34(8):694-699

This study investigated the acute endocrine responses to a 164-km road cycling event in a hot environment. Thirty-four male experienced cyclists (49.1 ± 8.3 years, 86.8 ± 12.5 kg, 178.1 ± 5.1 cm) participating in a 164-km road cycling event were recruited. Blood samples were collected within 0.3–2.0 h before the start (PRE: ~0500–0700 h) and immediately following the ride (POST). Samples were analysed for testosterone, growth hormone (GH), cortisol and interleukin-6 (IL-6). The temperature and humidity during the event were 35.3 ± 4.9°C and 47.2 ± 14.0%, respectively. Based on the finishing time, results for the fastest (FAST, 305 ± 10 min) and the slowest (SLOW, 467 ± 31 min) quartiles were compared. At POST, testosterone concentration was significantly (P < 0.05) lower (PRE, 20.8 ± 8.6; POST, 18.2 ± 6.7 nmol · L^?1), while GH (PRE, 0.3 ± 0.1; POST, 2.3 ± 0.3 µg · L^?1), cortisol (PRE, 661 ± 165; POST, 1073 ± 260 nmol · L^?1) and IL-6 (PRE, 4.0 ± 3.4; POST, 22.4 ± 15.2 pg · mL^?1) concentrations were significantly higher than those at PRE. At POST, GH and cortisol were significantly higher for the FAST group than for the SLOW group (GH, 3.6 ± 2.0 and 1.0 ± 0.8 µg · L^?1; cortisol, 1187 ± 209 and 867 ± 215 nmol · L^?1). Participation in an ultra-endurance road cycling event in a hot environment induced significant acute changes in concentrations of circulating hormones, with a greater augmentation of GH and cortisol in those completing the ride fastest.  相似文献   

An analysis of how and why a TAFE course was changed: The implications     

Peter McKenzie 《The Australian Educational Researcher》1991,18(3):1-20

The Federal government has indicated that vocational education, especially education that is technically oriented, is essential to Australia’s economic future. The Federal government has also expressed concern at the educational inequalities faced by certain groups in society. The Associate Diploma of Technology (Computing) a cross-accredited course giving access to a university degree, was designed to address both of these concerns. This article examines how the course has been altered and the forces behind these changes. This examination is carried out by exploring different perspectives of the course, such as: the government, TAFE, and the students and the teachers. The resulting evidence suggests that students have taken up the government’s rhetoric; they believe they will be snapped up by industry and gain employment in high technology areas, and think that social issues are a waste of time. The evidence also indicates that the course is being targeted more towards young adults who have failed to get into a university course than towards the original target of women and immigrants.  相似文献   

Can squirrel monkeys (Saimiri sciureus) plan for the future? Studies of temporal myopia in food choice     

McKenzie T  Cherman T  Bird LR  Naqshbandi M  Roberts WA 《Learning & behavior》2004,32(4):377-390

In seven experiments, 2 squirrel monkeys were given choices between arrays of food that varied in the quantity offered. In Experiments 1-5, the monkeys were offered choices between quantities of the same food that varied in a 2:1 ratio. The squirrel monkeys failed to show the temporal myopia effect or a decrease in preference for the larger quantity as the absolute number of food items offered increased. Even when given choices of 8 versus 16 peanuts and 10 versus 20 peanuts, both monkeys significantly preferred the larger quantity. An examination of the monkeys' rates of consumption indicated that 20 peanuts were consumed over a 1- to 2-h period, with eating bouts separated by periods of nonconsumption. In Experiments 6A, 6B, and 7, food was either pilfered or replenished 15 min after an initial choice, so that choice of the smaller quantity led to more total food in the long run. These manipulations caused both monkeys to reduce choice of the larger quantity, relative to baseline choice. The results suggest that squirrel monkeys anticipated the future consequences of their choices.  相似文献   

Networking around The Waterhole and other tales: the importance of relationships among texts for reading and related instruction     

Pauline Harris  Barbara McKenzie 《Literacy》2005,39(1):31-37

This article explores ways in which children's picture books form networks of relationships, and their implications for readers and classroom teachers. In this exploration, reading is seen to involve making connections within and beyond the text at hand. These connections, evoked differently across readers, shape readers' interpretations of text. Many possible meanings may arise from just one text, reinforcing the idea that no single correct meaning resides in a text. This article demonstrates tools for exploring textual connections with readers, and the value of such explorations for opening‐up reader interpretations of a text.  相似文献   

A Word for Encouragement     

Malcolm W. McKenzie 《College Teaching》2013,61(4)

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Student activity levels, lesson context, and teacher behavior during middle school physical education     

McKenzie TL  Marshall SJ  Sallis JF  Conway TL 《Research quarterly for exercise and sport》2000,71(3):249-259

There is little research on students' engagement in physical activity in middle school physical education (PE). We observed student activity, lesson context, and teacher behavior in 430 PE lessons taught by 126 teachers in 24 schools. Variables were analyzed by mixed-model nested analyses of covariance. Boys were more active than girls overall and during skill drills, game play, and free play. Student activity varied by lesson context, with fitness activities producing the most activity. Class size was negatively associated with student activity. Daily PE contributed a weekly total of 25 min of vigorous activity and 83 min of moderate-to-vigorous activity--much less than national objectives. Results suggest that numerous opportunities exist for increasing student physical activity during middle school PE.  相似文献   

Education policy mobility: reimagining sustainability in neoliberal times     

Marcia McKenzie  Andrew Bieler  Rebecca McNeil 《Environmental Education Research》2015,21(3):319-337

This paper is concerned with the twinning of sustainability with priorities of economic neoliberalization in education, and in particular via the mobility or diffusion of education policy. We discuss the literature on policy mobility as well as overview concerns regarding neoliberalism and education. The paper brings these analyses to bear in considering the uptake of sustainability in education policy. We ask to what extent sustainability as a vehicular idea may be twinning with processes of neoliberalization in education policy in ways that may undermine aspirations of, and action on, environmental sustainability. Toward the end of the paper, we draw on data from an empirical study to help elucidate how the analytic frames of policy mobility can inform our analyses of the potential concerns and possibilities of sustainability as a vehicular idea. In particular, we investigate how sustainability and related language have been adopted in the policies of Canadian post-secondary education institutions over time. The paper closes by suggesting the potential implications of the proceeding analyses for policymakers, practitioners, and researchers concerned with sustainability in education policy.  相似文献   

Making and Breaking Careers: Reviewing Law Enforcement Hiring Requirements and Disqualifiers     

McKenzie Wood 《Journal of Criminal Justice Education》2017,28(4):580-597

With an increasing number of students entering criminal justice programs across the country, the majority of students are looking to pursue a career in law enforcement. While many students graduate college equipped for the law enforcement job market, some are unprepared for the scrutiny and depth the law enforcement hiring process requires. Using LEMAS data and a content analysis, this article reviews local and federal law enforcement agency websites and investigates specific job requirements, as well as noted disqualifiers, for both local and federal law enforcement positions. Furthermore, this article offers suggestions to criminal justice educators for assisting students in being prepared for realistic employment opportunities in the criminal justice field upon graduation.  相似文献   

Meeting the Great Challenge: What Growth-Oriented Writing of the 1960s and 1970s can Teach Us about Uniting the Individualistic and Social Aims of English Education     

Cori McKenzie 《Changing English: An International Journal of English Teaching》2017,24(1):91-102

This study explores the relationship between two values that sit at the heart of English education: a commitment to democratic citizenship and a commitment to fostering students’ personal growth. Some scholars have argued that these values are often at odds and the ‘great challenge’ of the field is to unite the individualistic and social goals of English education. The study explores the commensurability of these aims by considering the way they were united in the growth-oriented practitioner writing composed in the decade after the Anglo-American Seminar on the Teaching of English in 1966. To conduct the study, I examined English Journal articles written between 1968 and 1978 to see if articles that emphasised students’ personal growth also attended to the goal of democratic citizenship. The analysis shows that while it may be rare for advocates of the personal growth model to attend to students’ development as citizens, these goals are not inherently incompatible. I conclude with closing remarks on what this study suggests about how the field might meet the ‘great challenge’ of uniting the individualistic and social aims of English.  相似文献