Examining the influence of grip type on wrist and club head kinematics during the golf swing: Benefits of a local co-ordinate system     

Howie J. Carson  Jim Richards  Bruno Mazuquin 《European Journal of Sport Science》2019,19(3):327-335

Wrist movements have been identified as an important factor in producing a successful golf swing, with their complex motion influencing both club head velocity and orientation. However, a detailed analysis of wrist angles is lacking in the literature. The purpose of this study was to determine kinematics across wrists and club head characteristics during the golf swing under weak, neutral and strong grip conditions. Twelve professional male golfers executed 24 shots using a driver under three grip conditions. A six degrees of freedom analysis of the hand with respect to the distal forearm was performed using a 10-camera three-dimensional motion capture system. Differences in joint angles were explored using repeated measures ANOVAs at key swing events (onset, top of backswing and impact), in addition club head velocity and clubface angle at impact were also explored. Main findings revealed significant differences in flexion/extension and internal/external rotation for both wrists at all swing events, whereas fewer significant interactions were found in ulnar/radial deviation across grips for both wrists at all events. Clubface angle only differed significantly between the weak and the strong and neural grips, presenting a more ‘open’ clubface to the intended hitting direction. This study is the first to explore tri-planar wrist movement and the effect of different grips, such analysis has implications for coaching knowledge and practice and should inform future research into different aspects of skill, technique analysis and may inform injury mechanisms/prevention.  相似文献   

Gendered positionality among Irish male primary teachers: the staff room as a site of performative masculinity     

Suzanne O'Keeffe  Jim Deegan 《Irish Educational Studies》2018,37(3):373-389

The concept of masculinities has traditionally been defined in terms of crises associated with boys’ underachievement, the violence of homophobia, the under-representation of males in caring occupations, the rituals and discourses of laddism, and perceptions of disaffected and unrealised talent. Whereas the topic of masculinities has long been associated with warrants for distinctive and diverse male identities, it has a comparatively more recent history in the research on male Irish primary teachers as a particular social category. Two key findings are discussed in relation to performative masculinities – a form of strategic manoeuvring designed to exploit gender discourses, practices for control, power and privilege. First, the findings show the staffroom as a bellwether or highly developed locus for teacher socialisation through gendered discourses, events and actions. Second, the findings show nonsynchronous performative masculinities not only between male and female teachers but also with male colleagues. Therefore, it is argued that this frequently forgotten and neglected seam in the grand narrative of schools and schooling in Ireland needs to be more fully understood as a variable of quality, social justice and democratic practices across the full scope and sequence of the teacher continuum and as a prerequisite component in all teacher leadership programmes.  相似文献   

Technology column: public libraries as civic technology hubs     

Lori Bowen Ayre  Jim Craner 《Public Library Quarterly》2017,36(4):367-374

Civic technology is used to improve how citizens, businesses, and other groups engage and conduct business with governments. Libraries across the United States are uniquely positioned to be key players in the civic technology movement. Libraries offer community spaces where everyone is welcome and where people can come together, learn about new technologies, access information, and solve shared problems. By bringing our unique attributes and resources to bear, libraries can play a part in developing applications and services that power our communities.  相似文献   

The Transfer of Training: a cognitive perspective     

Jim Mitchell 《Asia-Pacific Journal of Teacher Education》1992,20(1):5-12

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Book reviews     

Jim Murphy  Robin Jones  Robert McCaig  K. M. Harman  Carolyn D. Baker 《The Australian Educational Researcher》1990,17(2):75-85

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Archetypal narratives in career counselling: a chaos theory application     

Robert G. L. Pryor  Jim E. H. Bright 《International Journal for Educational and Vocational Guidance》2008,8(2):71-82

This paper seeks to extend previous work on narrative career counselling by considering the role of plot within clients’ narratives. Seven archetypal narratives derived from the work of Booker (2004) are introduced that represent systems of meaning to provide insight into how individuals interpret their experience. These plots can be understood within the Chaos Theory of Careers (CTC) in terms of the attractors contained within the client narratives. Identifying the plots provides new insights into the nature of career development difficulties and how client stories may be reformulated.  相似文献   

Educational research,the education profession and public policy     

Jim Walker 《The Australian Educational Researcher》1992,19(1):19-28

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Exploring the Use of Cases and Case Methods in Influencing Elementary Preservice Science Teachers' Self-Efficacy Beliefs     

Susan Yoon  Erminia Pedretti  Larry Pedretti  Jim Hewitt  Kirk Perris  Roland Van Oostveen 《Journal of Science Teacher Education》2006,17(1):15-35

In this study, we hypothesize that cases demonstrating exemplary practice in the science classroom can be used as a source for learning content and pedagogical skills that will improve teachers' self-efficacy beliefs. Twelve preservice elementary science teachers are followed as they participate in a case and case method activity illustrating the Grade 7 topic of robotics and fluids. While there was little evidence to show improvements in content knowledge, results indicate that the case acted as a boundary object for brokering between individual experiences and those found in the science teaching community by scaffolding for multiple points of entry, bridging the theory practice gap and offering beginning teachers more immediate access to the community of already practicing teachers.

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Which future,university or bureaucracy?     

Jim Binder 《Innovative Higher Education》1983,8(1):29-37

This article is critical of major institutions of higher education because they often establish criteria for rewarding professors and organizational processes that have little to do with developing a real university. The author argues for the reconstruction of universities based on values of freedom and responsibility. A model based on such values, a creative university is developed and contrasted with educational bureaucracies. Arguments are given to favor the creative university as our best hope for the future.  相似文献   

Do the effects of computer-assisted practice differ for children with reading disabilities with and without IQ-achievement discrepancy?     

Jiménez JE  del Rosario Ortiz M  Rodrigo M  Hernández-Valle I  Ramírez G  Estévez A  O'Shanahan I  de la Luz Trabaue M 《Journal of learning disabilities》2003,36(1):34-47

This study was designed to assess whether the effects of computer-assisted practice on visual word recognition differed for children with reading disabilities (RD) with or without aptitude-achievement discrepancy. A sample of 73 Spanish children with low reading performance was selected using the discrepancy method, based on a standard score comparison (i.e., the difference between IQ and achievement standard scores). The sample was classified into three groups: (1) a group of 14 children with dyslexia (age M = 103.85 months; SD = 8.45) who received computer-based reading practice; (2) a group of 31 "garden-variety" (GV) poor readers (age M = 107.06 months; SD = 6.75) who received the same type of instruction; and (3) a group of 28 children with low reading performance (age M = 103.33 months; SD = 9.04) who did not receive computer-assisted practice. Children were pre- and posttested in word recognition, reading comprehension, phonological awareness, and visual and phonological tasks. The results indicated that both computer-assisted intervention groups showed improved word recognition compared to the control group. Nevertheless, children with dyslexia had more difficulties than GV poor readers during computer-based word reading under conditions that required extensive phonological computation, because their performance was more affected by low-frequency words and long words. In conclusion, we did not find empirical evidence in favor of the IQ-achievement discrepancy definition of reading disability, because IQ did not differentially predict treatment outcomes.  相似文献