Development and Validation of a Method for Determining Tridimensional Angular Displacements with Special Applications to Ice Hockey Motions

Abstract

Tridimensional angular displacements of the skates were determined with a single cinecamera used in conjunction with two orthogonal rods attached to the rear part of the skater's boots. The method was based on the commutative law with the imposed restrictions that two of the angles were small in relation to the other one, and that a sequence of angular displacements was defined. This approach required the sole determinations of the planar coordinates of the three points delimiting the orthogonal rods. An experimental setup was designed to validate the method: the criterion angles were approximated with less than 2 degrees of error. Subsequently, the method was applied to a practical situation: the two-legged stop in ice hockey. The combination of this tridimensional method with instrumented strain gauge skates for the measurement of forces provides a new and powerful tool for performing kinetic analyses in tridimensional skating activities.     

The indifference of distinction. Art schools and the noblesse oblige of privileged students

ABSTRACT

A consolidated sociological line of the research allows us to understand the educational advantages of middle-class pupils in terms of the dynamics of reproduction [Bourdieu, P., and J. C. Passeron. 1970. The Inheritors: French Students and Their Relations to Culture, translated and edited by Richard Nice. Chicago: University of Chicago Press; Power, S., T. Edwards, G. Whitty, and V. Wigfall. 2003. Education and the Middle Class. Buckingham: Open University Press]. However, some scholars have pointed out how this process cannot be taken for granted, highlighting the difficulties experienced by youths in reaching academic success [Reay, D., and H. Lucey. 2002. “Carrying the Beacon of Excellence: Social Class Differentiation and Anxiety at a Time of Transition.” Journal of Education Policy 17 (3): 321–336. Doi:10.1080/02680930210127586]. Based on Bourdieu’s perspective, this article will explore the links between low educational attainment, artistic passion, and high aspirations in privileged students. The research is based on in-depth interviews and focus groups with middle-class pupils in two secondary art schools in Milan. It is argued the artistic disposition acts within dynamics of negotiation among different and contrasting expectations. Creativity emerges as a source to perform gendered privileged learner identities. This study on artistic educational pathways can contribute to understanding the process-making of inequalities in creative fields.     

Governance and knowledge transformations in educational administration: Greek responses to global policies

This article explores the localisation of the global and European discourse of educational governance in the Greek education system through the changes that have been introduced in the field of education administration since 2009 by the then socialist government. Our research aims to contribute to the critical policy literature on the spreading marketisation and privatisation in the governing of education around the world and in Europe – through the adoption of New Public Management and Educational Leadership models. In developing our theoretical perspective, we use the Foucauldian concepts of governmentality and discourse, and in order to conceptualise power and control relations in the organisation, transmission, acquisition, and evaluation of pedagogical knowledge, we draw on Bernstein's theory of symbolic control. Our study has examined how the field of education administration is governed through power and knowledge transformations. We trace these transformations by analysing systematically the pedagogic discourse through which the global governance discourse is relayed and becomes a ‘regime of truth’ within public policy and practice in Greece. We argue that such changes have significant implications for everyday educational practice and for the kinds of knowledge that are considered legitimate, and they may affect educational professionals' subjectivities in fundamental ways.     

A pedagogical analysis of science textbooks: How can we proceed?

This paper discusses some of the available frameworks for the pedagogical analysis of school science textbooks. First, it distinguishes between (a) studies which focus on elements of textbooks, such as the content, vocabulary, illustrations used, and the teaching methods promoted; and (b) those which consider the principles that organize the content and the form of presentation. In attempting to consider the sorts of principles that may be used in the studies categorised under (b), two crucial issues are discussed. The first issue refers to the relationship between scientific knowledge and school knowledge, which, as the relevant literature suggests, might not be conceived merely as a simplified “casting” of the scientific structure, but rather should be understood as a complex social process. The second issue explicitly addresses the nature of the pedagogic relationship and the place of the pedagogic text within it. Recent views about the nature of knowledge, it is argued, would suggest a reconceptualisation of the teaching activity, and indicate a model according to which the three elements of the teaching situation-the content, the pupil and the teacher—are seen as being (re)constituted in their articulation within and through the text(book). Thus, for example, what is to be a competent pupil in this approach is a function of the text. On the basis of these considerations, three approaches to the analysis of science textbooks are discussed: the socio-cognitive, the sociolinguistic and the socio-epistemic. The relative merits of the third approach are considered, and some examples are used from Greek science textbooks.     

Coexistence of proangiogenic potential and increased MMP-9, TIMP-1, and TIMP-2 levels in the plasma of patients with critical limb ischemia

Journal of Zhejiang University-SCIENCE B - 本研究通过比较间歇性跛行 (IC)...     

Physical discipline and children's adjustment: cultural normativeness as a moderator

Interviews were conducted with 336 mother-child dyads (children's ages ranged from 6 to 17 years; mothers' ages ranged from 20 to 59 years) in China, India, Italy, Kenya, the Philippines, and Thailand to examine whether normativeness of physical discipline moderates the link between mothers' use of physical discipline and children's adjustment. Multilevel regression analyses revealed that physical discipline was less strongly associated with adverse child outcomes in conditions of greater perceived normativeness, but physical discipline was also associated with more adverse outcomes regardless of its perceived normativeness. Countries with the lowest use of physical discipline showed the strongest association between mothers' use and children's behavior problems, but in all countries higher use of physical discipline was associated with more aggression and anxiety.     

Why do students consider dropping out of doctoral degrees? Institutional and personal factors

Despite the increasing popularity of doctoral education, many students do not complete their studies, and very little information is available about them. Understanding why some students consider that they do not want to, or cannot, continue with their studies is essential to reduce dropout rates and to improve the overall quality of doctoral programmes. This study focuses on the motives students give for considering dropping out of their doctoral degree. Participants were 724 social sciences doctoral students from 56 Spanish universities, who responded to a questionnaire containing doctoral degree conditions questions and an open-ended question on motives for dropping out. Results showed that a third of the sample, mainly the youngest, female and part time students, stated that they had intended to drop out. The most frequent motives for considering dropping out were difficulties in achieving a balance between work, personal life and doctoral studies and problems with socialization. Overall, results offer a complex picture that has implications for the design of doctoral programmes, such as the conditions and demands of part-time doctoral studies or the implementation of educational proposals that facilitate students’ academic and personal integration into the scientific community in order to prevent the development of a culture of institutional neglect.