Total Protein of Whole Saliva as a Biomarker of Anaerobic Threshold     

Miguel Sordi Bortolini Junior  Guilherme Gularte De Agostini  Ismair Teodoro Reis  Romeu Paulo Martins Silva Lamounier  Jeffrey B. Blumberg  Foued Salmen Espindola 《Research quarterly for exercise and sport》2013,84(3):604-610

Saliva provides a convenient and noninvasive matrix for assessing specific physiological parameters, including some biomarkers of exercise. We investigated whether the total protein concentration of whole saliva (TPWS) would reflect the anaerobic threshold during an incremental exercise test. After a warm-up period, 13 nonsmoking men performed a maximum incremental exercise on a cycle ergometer. Blood and stimulated saliva were collected during the test. The TPWS anaerobic threshold (PAT) was determined using the Dmax method. The PAT was correlated with the blood lactate anaerobic threshold (AT; r = .93, p < .05). No significant difference (p = .16) was observed between PAT and AT. Thus, TPWS provides a convenient and noninvasive matrix for determining the anaerobic threshold during incremental exercise tests.  相似文献   

A spectral analysis of team dynamics and tactics in Brazilian football     

Felipe Arruda Moura  Luiz Eduardo Barreto Martins  Ricardo O. Anido  Paulo Régis C. Ruffino  Ricardo M. L. Barros  Sergio Augusto Cunha 《Journal of sports sciences》2013,31(14):1568-1577

Abstract

The purposes of this study were to characterise the total space covered and the distances between players within teams over ten Brazilian First Division Championship matches. Filmed recordings, combined with a tracking system, were used to obtain the trajectories of the players (n = 277), before and after half-time. The team surface area (the area of the convex hull formed by the positions of the players) and spread (the Frobenius norm of the distance-between-player matrix) were calculated as functions of time. A Fast Fourier Transform (FFT) was applied to each time series. The median frequency was then calculated. The results of the surface area time series median frequencies for the first half (0.63 ± 0.10 cycles · min^?1) were significantly greater (P < 0.01) than the second-half values (0.47 ± 0.14 cycles · min^?1). Similarly, the spread variable median frequencies for the first half (0.60 ± 0.14 cycles · min^?1) were significantly greater (P < 0.01) than the second-half values (0.46 ± 0.16 cycles · min^?1). The median frequencies allowed the characterisation of the time series oscillations that represent the speed at which players distribute and then compact their team formation during a match. This analysis can provide insights that allow coaches to better control the team organisation on the pitch.  相似文献   

Migrant worker children: Conceptions of homelessness and implications for education     

Richard Kozoll  Margery Osborne  Georgia Earnest GarcÍA 《International journal of qualitative studies in education》2013,26(4):567-585

In this paper the authors draw from interviews with young migrant workers to problematize the question "What is a home?" The argument is made that once we acknowledge alternative images of "home" and the values and priorities that follow, policies and services for migrant workers and their children might take different forms than are currently configured. Migrating, or becoming "homeless," is a choice these families make to maintain their family structure. For these people homed-homeless is not a dichotomy. Rather, the operative word is family. The structure of the family is analyzed as a lifeworld (Habermas, 1984, 1987), or system of values and experiences that defines choices and ways of acting. Importantly, migrant workers travel as families and often as extended families. The unit of the family is assumed. Tensions arise when an individual member of the family questions the assumption of everyone working together for the family unit. When the family decides to break the unit, for example by sending a child away so he/she can attend school, the unit suffers as well as the individual. The sense of power that many assume is located in the home - a particular physical space - is also located in the family and the relationships among persons the word family implies. Social policies and institutions often disregard this distinction. 1  相似文献   

Kohlberg's Theory of Moral Development and Its Relevance to Education     

Andri Ísaksson 《Scandinavian Journal of Educational Research》2013,57(2):47-63

Isaksson, A. 1979. Kohlberg's Theory of Moral Development and Its Relevance to Education. Scandinavian Journal of Educational Research 23, 47‐63. The main assumptions and categories of Kohlberg's theory of moral development are succinctly outlined. New empirical studies and critical reviews are discussed, and their implications for the theory assessed. It is concluded that the theory is correct in its basic assumption of viewing moral development as a sequential progression towards more complex structural wholes that can be conceptualized as levels or stages. Empirical evidence is found to lend greater support to the identity of three sequential structural levels than to six distinct stages. Kohlberg's and his associates’ approach to moral education is briefly described. The relevance of the theory to moral education is seen as self‐evident. The conditions for the efficacy of moral educational programmes are discussed. The general conclusion of the article is that Kohlberg's approach has proven its basic theoretical and heuristic value. The theoretical framework favoured by the author is cognitive‐developmental.  相似文献   

Approaches and Methodologies for a Course on History and Epistemology of Physics: Analyzing the Experience of a Brazilian University     

Katemari Rosa  Maria Cristina Martins 《Science & Education》2009,18(1):149-155

This paper is an analysis of inserting history and philosophy of science (HPS) in a physics undergraduate program at a Brazilian university. It is an examination of the approaches and methodologies adopted by professors of a History and Epistemology course. The course aims to have an explicit approach to HPS. The results suggest a concern of the Physics Institute regarding inserting these questions into physics teacher training programs. The study also uncovered that the professors who taught the subject had different visions of HPS.  相似文献   

On the Meeting of the Moral and the Aesthetic in Literary Education          下载免费PDF全文

ANDRÉS MEJÍA  SILVIA EUGENIA MONTOYA 《Journal of Philosophy of Education》2017,51(2):370-386

For millennia it has been discussed whether literature appropriately can or should be used in education for a moral purpose. Taking as a premise that it can actually be educative and not merely moralising, we tackle the case made against such use, based on the claim that it would be perverting the aesthetic nature of literature as a form of art, as it would be instrumentalised. Given that this claim is based on a dichotomy between an aesthetically educative approach and a morally educative approach to literature, we examine how warranted such a formulation of this dichotomy is. We argue that, at least on some occasions, those two educative approaches to literature—the aesthetic and the moral—can actually be mutually reinforcing in such a way that aesthetic appreciation will suffer if the moral is not deeply examined with both mind and heart, and vice versa. This does not mean, however, that this relation of mutual contribution will always obtain in a neat way. It may actually be the case that just in a few cases, and only if carried out in a pedagogically appropriate manner, it will be correct to use literature with a morally educative purpose.  相似文献   

THE RESPONSIBILITIES OF MANAGERS IN EDUCATION     

György Páris 《Higher Education in Europe》1985,10(3):15-18

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大坝与坝基稳定性分析研究     

赵引 《东南大学学报》2004,20(4):508-512

大坝与坝基的稳定一直是工程师密切关注的一个安全问题. 论文提出2种分析重力坝和坝基稳定的方法: 一种是基于刚体极限平衡原理的直接分析方法, 它将坝体和岩基作为不变形的刚体, 利用该方法可直接计算出可能滑动面的安全因数; 另一种是基于弹塑性理论的间接分析方法, 它采用非线性有限元方法分析大坝和坝基的应力和变形. 根据收敛和突变准则来确定稳定安全度.结果表明:工程建筑物的破坏不仅仅是由于施加荷载的原因,同时也与组成材料的性质有关.  相似文献   

Knowledge about Science in Science Education Research from the Perspective of Ludwik Fleck’s Epistemology     

André Ferrer Pinto Martins 《Research in Science Education》2016,46(4):511-524

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Policy,practice, and reconversion in Spanish educational reform: teaching and teacher education in physical education     

JOSE DEVÍS‐DEVÍS 《Curriculum Journal》2013,24(2):213-230

Abstract

Since the late 1980s, reform of the Spanish education system has been justified by reformists as a response to the social and economic changes that have occurred in Spanish society since the democratic transition in the 1970s. Consolidation of democracy, development of technology and economic convergence with the advanced nations of Europe have been seen as the major challenges for educational reform. Restructuring and legitimation processes derived from the requirements of the new reform have been conceptualized as a policy of reconversion, the main purpose of which is to maintain, or achieve, a strong competitive position in the international market. In this paper, conceptualizing educational reform as a reconversion process will allow us to link aspects of the new curriculum (content, pedagogy and assessment), school organization, teaching and teacher education in physical education with wider economic, social and cultural influences and explore the tensions and conflicts between policy and practice in PE in schools. The paper will argue that there is a widening gap between the interests of progressive educationalists and the direction of market‐driven education reform.  相似文献