Effect of cold water immersion on repeat cycling performance and thermoregulation in the heat     

Joanna Vaile  Shona Halson  Nicholas Gill  Brian Dawson 《Journal of sports sciences》2013,31(5):431-440

Abstract

To assess the effect of cold water immersion and active recovery on thermoregulation and repeat cycling performance in the heat, ten well-trained male cyclists completed five trials, each separated by one week. Each trial consisted of a 30-min exercise task, one of five 15-min recoveries (intermittent cold water immersion in 10°C, 15°C and 20°C water, continuous cold water immersion in 20°C water or active recovery), followed by 40 min passive recovery, before repeating the 30-min exercise task. Recovery strategy effectiveness was assessed via changes in total work in the second exercise task compared with that in the first. Following active recovery, a mean 4.1% (s = 1.8) less total work (P = 0.00) was completed in the second than in the first exercise task. However, no significant differences in total work were observed between any of the cold water immersion protocols. Core and skin temperature, blood lactate concentration, heart rate, rating of thermal sensation, and rating of perceived exertion were recorded. During both exercise tasks there were no significant differences in blood lactate concentration between interventions; however, following active recovery blood lactate concentration was significantly lower (P < 0.05; 2.0 ± 0.8 mmol · l^?1) compared with all cold water immersion protocols. All cold water immersion protocols were effective in reducing thermal strain and were more effective in maintaining subsequent high-intensity cycling performance than active recovery.  相似文献   

What Factors Determine the Uptake of A-level Physics?     

Tim Gill  John F. Bell 《International Journal of Science Education》2013,35(5):753-772

There has been much concern recently in the UK about the decline in the number of students studying physics beyond age 16. To investigate why this might be we used data from a national database of student qualifications and a multilevel modelling technique to investigate which factors had the greatest impact on the uptake of physics at Advanced Level (A-level) in a particular year. Each factor of interest was entered into a separate model, while accounting for prior attainment and gender (both well-known predictors of A-level uptake). We found that factors associated with greater probability of uptake included better attainment in physics (or combined science) and maths qualifications at age 16 in comparison to other subjects, and (for girls only) attending an independent or grammar school. While it is difficult to address these factors directly, the results imply that more needs to be done to improve relative performance at General Certificate of Secondary Education, perhaps by increasing the supply of specialist physics teachers at this level and to overcome the perception (especially among girls) that physics is a particularly difficult subject.  相似文献   

Solving problems: young children exploring the rules of the game     

Gill Hope 《Curriculum Journal》2013,24(3):265-278

This article is not a review of the problem-solving literature but instead explores the idea of children developing problem-solving tactics as learning to applying the ‘rules of the game’, based on Wittgenstein's concept of ‘language games’. The kind of learning under discussion here is not learning of facts. I will not be discussing how we learn to recite the two times table but, rather, the dawning of understanding of what those facts mean: when a child realizes that the two times table divides up the whole universe into sets of either odds or evens. The necessity of accepting the rules of the game in order to perceive relevancy in determining problem-solutions was illustrated by Donaldson's (1992) work with small children. The existence of general rules, and hence generic problem-solving skills, is discussed and a model for problem-solving is suggested. The article concludes with some observations on the role of rule-breaking in discovery and invention. Examples are taken from the author's observations of young children in English classrooms.  相似文献   

Assistance and Accountability in Externally Managed Schools: The Case of Edison Schools,Inc.     

Julie Marsh  Laura Hamilton  Brian Gill 《Peabody Journal of Education》2013,88(3):423-458

Edison Schools, Inc., is the largest and most visible among a growing number of Education Management Organizations that have entered into contracts to manage public schools, including both conventional and charter schools. Edison's approach to managing schools is comprehensive, and it distinguishes itself from most other school improvement strategies by simultaneously addressing both the resources and assistance provided to schools and the accountability systems under which school staff operate. In this article we explore the ways in which the assistance and resources provided by Edison (including diverse professional development opportunities, materials, technology, and other tools), as well as accountability mechanisms (such as monitoring and rewards), have translated into principal and teacher actions, and the factors that facilitated or constrained educators' efforts to implement the Edison design and improve teaching and learning. Drawing on data gathered from extensive interviews, observations, and document reviews collected during a four-year comprehensive study of Edison schools, we demonstrate how Edison intends to promote not only educators' capacity but also their motivation and opportunity to deliver high-quality instruction. We examine variation that occurs across schools as teachers and principals respond to these system-level efforts. In addition, we identify several important predictors of variation in implementation, including the strength of instructional leadership provided by the principal and the presence or absence of district-imposed constraints such as union contract rules.  相似文献   

Student retention,teacher education,and Open Access publishing     

Gill Kirkup 《Open Learning》2013,28(2):101-104

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Social Inclusion for South Australian schooling? Trying to reconcile the promise and the practice     

Judith Gill 《教育政策杂志》2013,28(5):453-467

This paper will trace the adoption of a policy of Social Inclusion in schools in one Australian state in terms of the way in which the policy direction, its discourses and adoption reflect a rhetoric of what Ball has labelled a ‘paradigm of convergence’. The analysis will show that the policy discourse, especially in its focus on school retention, appears to endorse the vision of a neo‐liberal entrepreneurial competitor as the educated product despite being initiated and implemented by a Labor state government within a rhetoric of community concern for social justice. The second part of the paper reports on the ways in which primary school leaders have responded to this policy which reflects some older educational discourses and is more in line with a prior version of a well‐run school and an inclusive society.  相似文献   

Making it work for their children: white middle-class parents and working-class schools     

Gill Crozier  Diane Reay  David James 《International Studies in Sociology of Education》2013,23(3):199-216

The white middle-class parents who chose to send their children to urban comprehensives largely rejected engaging in the usual competitiveness for educational success. Nevertheless the parents in our study still found themselves wittingly or otherwise captured by that same discourse. Their children are high achievers and are regarded as a valuable resource for their comprehensive schools generating high volume capital. However, in spite of this, the parents do not leave such success to chance. Drawing on an ESRC-funded research project (Educational Choices and the White Urban Middle-Classes RES-148-25-0023) we analyse how middle-class parental involvement is part of the age old process of social reproduction and the transmission of parents’ middle-class privilege to their children, almost regardless of their intentions. Not only are the parents interventionist in their children’s schooling, they draw on and dispose their own privileged capitals to prepare and position their children for educational success.  相似文献   

The effects of facial‐head cue combinations on interpersonal evaluations     

W. Gill Woodall  Judee K. Burgoon  Norman N. Markel 《Communication quarterly》2013,61(3):47-55

Two experiments were conducted to examine the role of visual cues in interpersonal attraction and credibility. In the first study, 128 subjects viewed eight randomly ordered videotape segments of trained actors presenting a short speech accompanied by head nods, eyebrow raises, smiles, combinations of those cues, or no such cues. Ratings of the speakers on task and social attraction revealed that, as expected, the presence of any face or head cues produced more attraction than none; however, instead of the three combined cues producing the most attraction, the smiles‐head nod condition produced the greatest social attraction and the head nod only condition produced greatest task attraction; expected sex differences were largely supported. In the second study, face and head cues were performed by confederates during a live interview situation while subjects observed the interaction from behind a two‐way mirror. Results showed that smiles produced higher attraction and credibility ratings than did no smiles and nods, thus further substantiating the reward power of facial and head cues in social interaction.  相似文献   

关于悬链线的一点注记     

黄迅成 《扬州职业大学学报》2009,13(1)

悬链线是微积分、微分方程、微分几何、变分计算及数值分析中的一个重要课题.本文通过一些诸如方轮自行车、旋转的最小面积等有趣的例子,计算悬链线和相应半圆下面的面积,证明悬链线到处都有,但并不是无处不在.  相似文献   

A model for the effective engagement of all stakeholders in engineering education and its pilot implementation     

Bárbara Filipa Casqueria Coelho Gabriel  João Alexandre Dias-de-Oliveira  Victor Fernando Santos Neto  António Gill D’Orey De Andrade-Campos 《European Journal of Engineering Education》2018,43(6):950-966

Methodologies for engineering learning and teaching (MELT) approach aims to enhance the attractiveness of education through science, technology, engineering and mathematics (STEM) among young people, while promoting awareness of future careers in these areas. To this end, students’ expectations are considered within university programmes, aiming to an increased engagement in STEM careers. To accomplish these goals, a new and integrated approach (MELT) is presented, involving the main stakeholders in both scientific education and society. An education framework is presented, providing guidelines for an improved collaborative approach to STEM education in the future. Results from the pilot implementation of MELT are presented, from a small-scale education parliament prototype. From these initial stage and results, it is seen that there is a need for a proper alignment of expectations from all involved stakeholders, concerning the engineering education towards society’s demands.  相似文献