The influence of Cardan rotation sequence on angular orientation data for the lower limb in the soccer kick

Abstract

The influence of the Cardan rotation sequence on the orientation angles for joints is well known but has not been explored for dynamic sports movements. The purpose of this study is to establish the influence of Cardan rotation sequence on the orientation angles of the ankle, knee, and hip of the support leg and pelvis during dynamic sports movements, typified by a maximal instep kick in soccer. We found that: (a) the X (flexion/extension) axis rotations provide data that are robust for any sequence used other than the YXZ sequence, although the Y (abduction/adduction) and Z (internal/external) axes rotations are variable in both shape and offset magnitude; (b) the preferred rotation sequence is either XYZ or XZY for dynamic sports movements, although for the soccer kick the XYZ rotation sequence has been widely used and so this is recommended as a standard; and (c) most uncertainties exist in the Y and Z axes and are most apparent at the beginning of the movement. Where uncertainty exists in identifying Y and Z axes orientations, the integrated angular velocity may be considered as an alternative to determine the relative changes in segment orientation.     

Instructional Climates in Preschool Children Who Are At-Risk. Part II

In Part II of this study, we examined the effect of two 9-week instructional climates (low-autonomy [LA] and mastery motivational climate [MMC]) on perceived physical competence (PPC) in preschoolers (N = 117). Participants were randomly assigned to an LA, MMC, or comparison group. PPC was assessed by a pretest, posttest, and retention test with the Pictorial Scale of Perceived Competence and Social Acceptance. A significant Treatment × Time interaction (p < .001) was present, supporting that MMC participants reported significantly higher PPC scores over time, while no positive changes were present in LA and comparison participants. The results show that an MMC leads to psychological benefits related to achievement motivation. These findings should encourage early childhood educators to consider the effect of instructional climates on children's self-perception.     

The FTSE-British Olympic Association Initiative: A resource dependence perspective

The Financial Times Stock Exchange (FTSE)-British Olympic Association (BOA) Initiative, a partnership scheme initiated in 2007 between a number of FTSE 100 companies and Olympic National Governing Bodies (NGBs) in the UK, seeks to improve the effectiveness of the Olympic NGBs delivery and subsequent performance through the provision of support in-kind from the corporate partner. The paper uses resource dependency theory to analyse the partnerships within the Initiative, focusing primarily on the operation and benefits of those partnerships from the perspective of the Olympic NGBs. Despite being the less powerful party in the partnership, the NGBs are able to use the partnerships to acquire critical resources. While the benefits received by the companies are softer and more social in nature, nevertheless they demonstrate mutual dependency between the partners. This knowledge provides an incentive for NGBs to engage in co-optation and constraint activities as a way to strengthen the dependency relationships and protect their position.     

The development, validation, and applicability of The Personnel Evaluation Standards

Michigan State UniversityAir Force Human Resources Laboratory     

Investigating the impact of NAPLAN on student,parent and teacher emotional distress in independent schools

Concerns have been raised about the impact Australia’s national standardised testing, the National Assessment Program-Literacy and Numeracy (NAPLAN), has upon the well-being of students, parents and teachers. To date, research evidence is unclear as to the level and extent of emotional distress experienced by stakeholders during testing. Despite an unclear evidence base, the prevailing view is that NAPLAN has a general negative impact upon stakeholder well-being. In a pilot study that surveyed all stakeholder groups across 11 independent schools in Western Australia, we found evidence of a minimal impact from the testing. We also found evidence for a small positive association between student and parent distress during testing, and a moderate positive association between parent and teacher distress during testing and their estimations regarding how NAPLAN impacts other people. Our results are not consistent with the prevailing view that NAPLAN has a broad negative impact on well-being, and highlights the need for further research to inform debates about the usefulness and impact of NAPLAN testing.     

The ‘Problem’ of the Female Pupil Teacher: constructions,conflict and control 1860‐1910

This paper highlights just one aspect of the highly gendered nature of nineteenth century pupil teaching and focuses on how the female pupil teacher was constructed as a ‘problem’. The paper consists of two broad sections and draws extensively upon the experience of female pupil teachers who attended pupil teacher centres during the school board period. First, to set the scene and contextualise the ‘problem’, a brief account of the feminisation of teaching and what this meant for the female pupil teacher and pupil teaching in general is explored, with particular reference to the complexities of female pupil teachers’ working life and the issue of mixed centre organisation. Secondly, there follows an analysis of how attempts were made to solve or contain the perceived ‘problem’ of the female pupil teacher through the simultaneous exercise of: moral control; protection and concern with physical and mental well‐being; moulding through the medium of ‘healthful recreation’.     

Using Virtual Field Trips to Connect Students with University Scientists: Core Elements and Evaluation of zipTrips?

Physical field trips to scientists?? work places have been shown to enhance student perceptions of science, scientists and science careers. Although virtual field trips (VFTs) have emerged as viable alternatives (or supplements) to traditional physical fieldtrips, little is known about the potential of virtual field trips to provide the same or similar science career exploration advantages as physical field trips. The overarching goal of this paper is to describe a VFT, zipTrips?, designed to provide middle school students, especially those in resource limited rural areas, with access to university scientists. Using zipTrips as a case example, the paper identifies and describes some of the core characteristics and elements of high quality authentic VFTs that foster student-scientist interactions. In addition, the paper uses program evaluation data to examine the impact of zipTrips on student perceptions of scientists.     

Break the rules,save the records: human rights archives and the search for justice in East Timor

How do distinctive historical experiences and political regimes shape human rights archives? How do those archives and those experiences in turn influence the way painful pasts are remembered or forgotten? And what can historical accounts tell us about the wisdom of prevailing norms and practices regarding the management and control of human rights records? This paper explores these questions through a close analysis of the history and politics of the principal archive documenting human rights abuse in East Timor. It underscores the work of archival studies scholars who argue that human rights archives are always in some degree shaped by the historical and political context in which they emerge and that conflicts over matters of content, mandate, and rules of access are virtually inevitable. Noting that such conflicts typically pit political authorities against victims and their advocates, it argues that successful human rights archival programs hinge critically on sensitive historical and political analysis and that, under certain conditions, human rights archivists should play a more active role in facilitating the pursuit of justice for victims of human rights abuse. It also makes the case for a move away from large, state-controlled archives toward multiple, smaller archives with varied mandates. Finally, it proposes the adoption of a new hierarchy of interest in the management of archives; away from the long-accepted principles of national sovereignty and inalienability, and in the direction of access to the survivors of human rights violations and their advocates.     

The Active Citizen's Information Media Repertoire: An Exploration of Community News Habits During the Digital Age

Digital technologies have reconfigured how active community members know about local news. Sampling one Midwest community's most engaged citizens—collectively, a “community of practice”—this research formalizes one emerging media-information repertoire around the issue of homelessness. Components of this repertoire include motivations, structuring conditions, norms of usage, and perceived consequences for media-source selection. Commenting, sharing, and other information exchange become “acts of news” for individuals involved in communities of practice. Through shared information-exchange practices, citizens can not only advocate their social causes but also reinvigorate their own affiliations to the community of practice and to the city itself. The use of this media repertoire by these individuals reconstitutes and amplifies their role in the pursuit of fostering a civil society focused on homelessness. The findings illuminate the process of how community activists work as an informal organizational form and, as a result, build a stronger commitment to civic action.