Investigation of high-speed badminton racket kinematics by motion capture     

Maxine Kwan  Michael Skipper Andersen  Ching-Lung Cheng  Wen-Tzu Tang  John Rasmussen 《Sports Engineering》2011,13(2):57-63

The kinematics of a badminton racket during a smash stroke was observed in this study with the purpose of investigating stroke dynamics and racket behaviour. Motion capture measurements of the racket during several smash strokes performed by three players of different skill levels indicated a clear increase in racket velocity at impact with increasing skill level. Variations between translational and rotational contributions to the impact speed could also be seen between the players. The advanced player produced a much higher peak angular velocity and also relied much less on translation, with a translational velocity of only 8% of the total velocity versus the 20% for the recreational player. It is proposed that, as an alternative to shuttlecock speeds, racket head speed measurements can be used as an indicator of performance, and can also provide some insight into the interaction between the racket and player.  相似文献   

Using my vocational situation with workers facing a plant closing   总被引：1，自引：0，他引：1  

G. Susan Mosley-Howard  Patricia Andersen 《Journal of Career Development》1993,19(4):289-300

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Early childhood professionals and children’s rights: tensions and possibilities around the United Nations General Comment No. 7 on Children’s Rights     

Glenda Mac Naughton  Kylie Smith 《International Journal of Early Years Education》2007,15(2):161-170

Young children’s views are heard rarely in public debates and are often subordinated to adults’ views. This article examines how early childhood staff could support and enhance young children’s participation in public decision making. We argue that when early childhood staff use their expertise in young children’s physical, social and cognitive development to facilitate consultations with young children, they are likely to reinforce the view that young children are unable to form and express their own views. Whatever their intentions, this weakens the notion of children’s rights and undermines young children’s participation in public decision making. In contrast, when staff use their expertise in child development to collaborate with young children, new social structures can emerge in which everyone’s voice is heard. This approach reaffirms staff’s status as experts, but redefines their expertise. Instead of being experts acting on behalf of children, staff become equitable collaborators with children, advancing citizenship for all.  相似文献   

An interview study of why parents conduct intensive ABA home training for their child with autism spectrum disorder. An analysis from the lens of the dialectical disability model     

Esther Ravn Andersen  Louise Bøttcher 《欧洲特需教育杂志》2017,32(2):270-286

The number of parents undertaking an intensive home training programme of children with disabilities (e.g. Applied Behavioural Analysis) has increased. It reveals a paradox in current disability research and policies. On the one hand, policies in general are aimed at inclusion through movement of social barriers for participation, grounded in the social model of disability. On the other hand, intensive home training is based on the aim of rehabilitation through intensive training of individual cognitive and social skills, an approach grounded in a bio-medical model. Intensive home training programmes are supported by political legislation that enables parents to partake the training and hire the necessary helpers. How is this paradox viewed from the perspective of the parents? From the departure of the dialectical model of disability – and its central concepts of developmental incongruence, developmental time and social agency – two mothers practising home training with their children with autism disorder were interviewed about their motives for home training and subsequent experience with their child. Results showed that the motive to home training was to create a local congruence that allowed the child to thrive. Intensive home training also restored the mothers’ sense of agency vis-à-vis their child’s development. However, home training might not abolish the need for adaptations of the child’s social practices outside the family. It is discussed how societal support to home training risks to hinder higher order reorganisation of developmental opportunities that are necessary to actualise policy statements of inclusion.  相似文献   

Interagency collaboration between child protection and mental health services: practices, attitudes and barriers     

Darlington Y  Feeney JA  Rixon K 《Child abuse & neglect》2005,29(10):1085-1098

OBJECTIVE: The aim of this paper is to examine some of the factors that facilitate and hinder interagency collaboration between child protection services and mental health services in cases where there is a parent with a mental illness and there are protection concerns for the child(ren). The paper reports on agency practices, worker attitudes and experiences, and barriers to effective collaboration. METHOD: A self-administered, cross-sectional survey was developed and distributed via direct mail or via line supervisors to workers in statutory child protection services, adult mental health services, child and youth mental health services, and Suspected Child Abuse and Neglect (SCAN) Teams. There were 232 completed questionnaires returned, with an overall response rate of 21%. Thirty-eight percent of respondents were statutory child protection workers, 39% were adult mental health workers, 16% were child and youth mental health workers, and 4% were SCAN Team medical officers (with 3% missing data). RESULTS: Analysis revealed that workers were engaging in a moderate amount of interagency contact, but that they were unhappy with the support provided by their agency. Principle components analysis and multivariate analysis of variance (MANOVA) on items assessing attitudes toward other workers identified four factors, which differed in rates of endorsement: inadequate training, positive regard for child protection workers, positive regard for mental health workers, and mutual mistrust (from highest to lowest level of endorsement). The same procedure identified the relative endorsement of five factors extracted from items about potential barriers: inadequate resources, confidentiality, gaps in interagency processes, unrealistic expectations, and professional knowledge domains and boundaries. CONCLUSIONS: Mental health and child protection professionals believe that collaborative practice is necessary; however, their efforts are hindered by a lack of supportive structures and practices at the organizational level.  相似文献   

Configuring the teacher as data user: public-private sector mediations of national test data     

Helene Ratner  Bjarke Lindsø Andersen  Simon Ryberg Madsen 《Learning, Media and Technology》2019,44(1):22-35

ABSTRACT

Datafication of student learning has carved out an influential space for public and private actors who design technologies for visualizing data. As data visualizations shape how teachers’ interpret data, they are powerful devices. This paper examines how teachers get configured as data users in the making of Danish national test data visualizations for municipal primary and lower secondary schools. The paper is based on a qualitative study of the Danish Ministry of Education, which develops the official visualizations, and NordicMetrics, a private consultancy offering a supplementing visualization of student progression. We draw on science and technology studies (STS) to theorize techno-organizational dynamics of developing visualizations. We propose to understand data visualizations as contingent, situated and socio-material achievements that configure teacher as data users. Comparing two institutions’ respective negotiations of different concerns when developing data visualizations enables us to consider the otherwise ‘hidden’ data mediators and the entwined relations between public and private data mediators.  相似文献   

Life in the Hive: Supporting Inquiry into Complexity Within the Zone of Proximal Development   总被引：1，自引：1，他引：0  

Joshua A. Danish  Kylie Peppler  David Phelps  DiAnna Washington 《Journal of Science Education and Technology》2011,20(5):454-467

Research into students’ understanding of complex systems typically ignores young children because of misinterpretations of young children’s competencies. Furthermore, studies that do recognize young children’s competencies tend to focus on what children can do in isolation. As an alternative, we propose an approach to designing for young children that is grounded in the notion of the Zone of Proximal Development (Vygotsky 1978) and leverages Activity Theory to design learning environments. In order to highlight the benefits of this approach, we describe our process for using Activity Theory to inform the design of new software and curricula in a way that is productive for young children to learn concepts that we might have previously considered to be “developmentally inappropriate”. As an illuminative example, we then present a discussion of the design of the BeeSign simulation software and accompanying curriculum which specifically designed from an Activity Theory perspective to engage young children in learning about complex systems (Danish 2009a, b). Furthermore, to illustrate the benefits of this approach, we will present findings from a new study where 40 first- and second-grade students participated in the BeeSign curriculum to learn about how honeybees collect nectar from a complex systems perspective. We conclude with some practical suggestions for how such an approach to using Activity Theory for research and design might be adopted by other science educators and designers.  相似文献   

Listening and Experiences of Interpersonal Transcendence     

Kylie L. Geiman  John O. Greene 《Communication Studies》2019,70(1):114-128

Interpersonal transcendence is a phenomenon marked by total immersion in an interaction, a deep sense of understanding, feelings of mutuality, new insight, and playfulness. Such experiences can be exhilarating, memorable, and rare. This study examines relationships between various listening dispositions and people’s propensity to experience interpersonal transcendence. Participants (N = 300) completed the Interpersonal Transcendence Scale (ITS) along with the Listening Styles Inventory (LSI), the Active Empathic Listening scale (AEL), and the Listening Styles Profile–Revised (LSP-R). Results indicated substantial relationships between ITS responses and the LSI and AEL. The LSP-R dimensions of Relational Listening and Analytical Listening were also related to ITS responses. Other results indicate that propensity to experience interpersonal transcendence is associated with minority group status and age.  相似文献   

Learning in the visual arts and the worldviews of young children     

James S. Catterall  Kylie A. Peppler 《Cambridge Journal of Education》2007,37(4):543-560

This paper reports a research study into the effects of rich, sustained visual arts instruction on 103 inner city 9‐year‐olds in two major US cities. We use the lenses of social learning theory, theories of motivation and self‐efficacy, and recent research on artistic thinking to investigate the programs' effects on children's self‐beliefs and creative thinking. The study enlisted a pre–post measure, treatment‐comparison group design along with structured observations of participant and comparison group classrooms. The arts students made significant comparative gains on a self‐efficacy scale and on an ‘originality’ subscale of a standard creativity test. These effects are attributed to children's engagement in art and to the social organization of instruction including reinforcing peer and student–adult relationships. Relationships between self‐efficacy beliefs and tendencies to think originally are explored.  相似文献   

Water Quality Statistics     

Ted Hodgson  Lyle Andersen  Jim Robison‐Cox  Clain Jones 《Teaching Statistics》2004,26(1):2-8

Water quality experiments, especially the use of macroinvertebrates as indicators of water quality, offer an ideal context for connecting statistics and science. In the STAR program for secondary students and teachers, water quality experiments were also used as a context for teaching statistics. In this article, we trace one activity that uses virtual streams and repeated sampling to develop the notion of a hypothesis test for one proportion.  相似文献