Kinematic analysis of the double side kick in pointfighting,kickboxing     

Dominik Hölbling  Emanuel Preuschl  Michaela Hassmann  Arnold Baca 《Journal of sports sciences》2017,35(4):317-324

The double side kick is a frequently used technique in pointfighting on which most offensive kicking techniques are based on. The aim of the study was to identify parameters, e.g., trunk and leg positions, durations and velocities that affect successful technique execution.

44 fighters, male and female, including European and World champions, participated in the research. The participants performed double side kicks to a punching bag with the target at chest level. 10 international experts scored (1–10 points; interrater correlation ICC (3,1): 0.952) videos of the best individual trial for quality of technique execution. Based on the average of the scores participants were categorised into 2 equally sized groups. For kinematic data acquisition, a Vicon 3D-motion capturing system was used. The normalised knee height of the kick leg (KHK), normalised absolute distance to the frontal shoulder (DKS) at the end of both chambering phases, the horizontal velocity during both chambering phases (KEV), the durations of all 6 functional phases and total duration, were analysed.

KHK1, KHK2, DKS1 and DKS2, total duration as well as 4 out of 6 phase durations and KEV1 showed significant differences between groups in two-sided t-test or Mann–Whitney U-test for not normally distributed variables.  相似文献   

Promoting Prenatal Exercise From a Sociocultural and Life-Course Perspective: An “Embodied” Conceptual Framework     

Shannon Jette  Julie Maier  Katelyn Esmonde  Cherise Davis 《Research quarterly for exercise and sport》2017,88(3):269-281

Purpose: Prenatal exercise is a health behavior that is receiving growing attention amid concern that women in Western societies are gaining excess weight during pregnancy and contributing to future obesity in both the mother and child. In this article, we draw on insights from the fields of social epidemiology and social theory of the body to examine existing prenatal exercise interventions and to propose a multidimensional framework intended to guide future theorizing and intervention design. Method: A scoping review of existing prenatal exercise programs and interventions focused on controlling gestational weight gain was conducted. Articles published prior to January 2017 were obtained from PubMed and CINAHL, and relevant articles were identified (n = 62) using specified inclusion and exclusion criteria. Identified articles were further analyzed to classify the level(s) of the socioecological model targeted in the intervention or program. Results: The majority of existing interventions target intrapersonal factors during pregnancy and do not attend to the role that cumulative exposure of social and structural disadvantage over the lifetime—not just during the prenatal period—plays in shaping health outcomes. In response, a multidimensional framework is proposed that includes key concepts that facilitate a life-course perspective, as well as attention to the integration of biological and social factors as they relate to health and health-related behaviors. Conclusion: Efforts to promote prenatal exercise and to improve maternal and infant health should attend to how systemic inequality impacts women’s health.  相似文献   

Bender-Gestalt Test and social interactions of kindergarten children: Effects of socialization practices     

Michaela Lifshitz 《Psychology in the schools》1978,15(2):180-188

The present study assessed the extent to which kindergarten children's performance on the Bender-Gestalt Test is related to sex and sociocultural variables on the one hand, and to children's social behavior on the other hand. Two distinetly different Israeli populations were included: (a) The Druze—representing the traditional-authoritative culture, and (b) The Jews—representing the Westernized democratic society. Generally, the Jewish children were more socially active, and could differentiate and integrate the neutral elements of the Bender-Gestalt Test much more often than did the Druze children. Significant correlations between perceptual indicators and social behaviors were found and suggest that the Bender-Gestalt Test can be used for assessing and understanding the nature of the child's social interactions and struggle for a position within the constraints of his/her culture.  相似文献   

Creating and encouraging an innovative academic environment in higher education     

Robert H. Maier Vice Chancellor  Edward W. Weidner Chancellor 《Higher Education》1975,4(1):69-76

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Conditioned inhibition and the UCS-CS interval     

Steven F. Maier  Peter Rapaport  Kimbal L. Wheatley 《Learning & behavior》1976,4(2):217-220

The role of temporal factors in the development of conditioned inhibition was investigated in a backward conditioning design. Separate groups of rats received tone CSs either 3 or 30 sec following shock presentations. The CSs predicted the same shock-free interval for both groups. A third group was presented with a random relationship between CS and shock. The CSs were tested by super-imposition on a Sidman avoidance baseline and only the group with a 3-sec UCS-CS interval revealed an inhibitory effect of the CS. These results are in accord with predictions made by the Solomon-Corbit model of acquired motivation and by Denny’s “relaxation” theory of escape and avoidance.  相似文献   

Comparing three attitude‐behavior theories for predicting science teachers' intentions     

Michaela Zint 《科学教学研究杂志》2002,39(9):819-844

Social psychologists' attitude‐behavior theories can contribute to understanding science teachers' behaviors. Such understanding can, in turn, be used to improve professional development. This article describes leading attitude‐behavior theories and summarizes results from past tests of these theories. A study predicting science teachers' intention to incorporate environmental risk education based on these theories is also reported. Data for that study were collected through a mail questionnaire (n = 1336, r_adjusted = 80%) and analyzed using confirmatory factor and multiple regression analysis. All determinants of intention to act in the Theory of Reasoned Action and Theory of Planned Behavior and some determinants in the Theory of Trying predicted science teachers' environmental risk education intentions. Given the consistency of results across studies, the Theory of Planned Behavior augmented with past behavior is concluded to provide the best attitude‐behavior model for predicting science teachers' intention to act. Thus, science teachers' attitude toward the behavior, perceived behavioral control, and subjective norm need to be enhanced to modify their behavior. Based on the Theory of Trying, improving their attitude toward the process and toward success, and expectations of success may also result in changes. Future research should focus on identifying determinants that can further enhance the ability of these theories to predict and explain science teachers' behaviors. © 2002 Wiley Periodicals, Inc. J Res Sci Teach 39: 819–844, 2002  相似文献   

Racist Harassment in the White Hinterlands: Minority ethnic children and parents' experiences of schooling in Northern Ireland     

Paul Connolly  Michaela Keenan 《British Journal of Sociology of Education》2002,23(3):341-355

The present article explores the nature and extent of racist harassment in predominantly white areas. It is based on a case study of Northern Ireland, and draws on data from in-depth interviews with a total of 32 children and 43 parents chosen from the four largest minority ethnic groups in the region: Chinese, Irish Travellers, South Asians and Black Africans. The article demonstrates that racist harassment is a significant problem in schools in Northern Ireland and highlights the varied forms that it can take, from overt acts of physical and verbal abuse to more covert and subtle forms of teasing and 'friendly' banter. It also highlights the central role that schools play within this. More specifically, some schools were found to respond appropriately and effectively to incidents of racist harassment among their pupils. Other schools, however, through inactivity and/or responding inappropriately, were found to not only indirectly reinforce the racist harassment that was taking place, but at times to directly contribute to it. The article concludes by stressing the relevance and importance of schools developing effective strategies for dealing with racist harassment in predominantly white areas.  相似文献   

Light and shadows: Appreciative inquiry,communication ethics literacy,and the opioid epidemic     

Craig T. Maier 《Qualitative Research Reports in Communication》2018,19(1):62-67

This study explores the interrelationship between Cooperrider’s (Barrett &; Cooperrider, 1990) appreciative inquiry (AI) and Arnett, Fritz, and Bell’s (2009 Arnett, R. C., Fritz, J. M. H., &; Bell, L. M. (2009). Communication ethics literacy: Dialogue and difference. Thousand Oaks, CA: Sage. [Google Scholar]) communication ethics literacy (CEL) through interviews with professionals struggling with a mid-Atlantic city’s opioid epidemic. Findings suggest that AI can pinpoint the “light” groups protect and promote, while CEL can clarify “shadows” hindering AI implementations and propose communicative practices to strengthen those goods.  相似文献   

Messages About Sex on Israeli Television: Comparing Local and Foreign Programming     

Keren Eyal  Yarden Raz  Michaela Levi 《广播与电子媒介杂志》2013,57(1):42-58

A content analysis of 584 prime-time programs examines messages about sex on Israeli television, comparing local and foreign shows. A 2-week composite sample from 7 commercial broadcast, cable, and satellite channels is analyzed. Results show that sexual content is highly prevalent, with a significantly higher frequency in foreign than local shows. Less than 20% of programs with sexual content address sexual health and risks; foreign shows again exceed local ones. Few differences emerge between local and foreign content in the contextual presentation of sex. Findings are discussed in light of theory, research, and implications for audience effects, policy, and education.  相似文献   

An investigation of the influence of emotional factors on learning in physics instruction     

Matthius Laukenmann  Michael Bleicher  Stefan Fuß  Michaela Gläser-Zikuda  Philipp Mayring  Christoph von Rhöneck 《International Journal of Science Education》2013,35(4):489-507

In a study of learning processes in 24 eighth grade physics classrooms in Germany, data were collected in respect to cognitive variables (prior knowledge, learning outcomes, use of learning strategies), cognitive-emotional variables (self-concept, interest), as well as emotional variables (anxiety, boredom, sense of well-being). Both quantitative and qualitative methods were used. Interest and emotional factors are further differentiated into situation-related and habitual (most likely biographically determined) components. In constructing the teaching unit (basic electricity) a learning oriented knowledge acquisition phase was followed by a more achievement oriented practice phase. Analysis shows that positive emotions are more important in the acquisition phase than in the practice phase. Anxieties play an ambiguous role in the practice phase. Additionally, the results provide indications that joy about learning in particular, and also interest are frequently linked to successful learning processes, and not merely to the nature of the subject matter.  相似文献