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Currently, all elite high jumpers use the Fosbury Flop technique with a curved approach. This suggests that the curved approach presents some clear advantage, although there is no general agreement upon the mechanism or the mechanics. This study aimed to determine the characteristics of the approach curve and to investigate how it contributes to the generation of somersault rotation. A simple theoretical model was used to demonstrate that a tightening approach curve would change the inward lean towards the centre of the curve into outwards lean. Three-dimensional video analysis was used to record the performances of two elite male high jumpers in competition. It was found that in each case the radius of the approach curve and the inward lean angle both decreased towards the end of the approach. The amount of outward lean angular velocity generated was shown to be a major proportion of the required somersault angular velocity for a jump. It was concluded that the main advantage of a curved approach was that it resulted in the generation of somersault velocity providing the curve tightened towards the end of the approach. 相似文献
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Zane Ma Rhea 《The Journal of environmental education》2018,49(2):103-116
ABSTRACTThis study takes food as its scape to propose an Indigenist, Gaian pedagogy and asks what food studies might reveal ecopedagogically for approaches to teaching about Indigenous matters in the context of environmental education and its research. Drawing on empirical research about food and Indigenous-settler relations in Australia, and through analysis of data amassed from student assignments on food sources conducted over a six- year period, I find that there is resistance to taking an Indigenist approach to critical, place-based education (PBE) even as Indigenous scholarship argues for its urgent need. Even more muted is the recognition of Gaian understanding of the need to preserve the languages of “Scapes” to help with this work. 相似文献
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Jennifer Stevens Aubrey Loreen Olson Mark Fine Todd Hauser David Rhea Brian Kaylor 《Communication quarterly》2013,61(1):80-102
This study investigated the personality and viewing-motivation correlates of reality television exposure. Results from a survey of 592 undergraduates showed that extroversion negatively predicted reality television exposure, whereas neuroticism was not associated with it. Both instrumental (social interaction, information, and arousal) and ritualized (relaxation, pass time, entertainment, and companionship) viewing motivations positively predicted exposure to reality television. A two-stage model by which personality traits contributed to viewing motivations, which, in turn, contributed to the selection of reality television, was tested and offered an adequate fit to the data. Implications for uses and gratifications research are discussed. 相似文献
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Zane Ma Rhea 《教育政策杂志》2013,28(1):45-66
This paper examines the Australian government’s Indigenous policy by interrogating the concept of partnership between governments and Indigenous communities through three examples. Increasingly, the Australian federal government is focusing attention on the poor literacy and numeracy outcomes for Indigenous children in remote and very remote locations. The three examples examined in this paper occurred between 2002 and 2007 during the development of the government’s policies about partnership accountability. A case study methodological approach evolved into a policy ethnography which was adopted to investigate the central question examined in this paper about the strengths and limitations of partnering as a policy concept. The strongest theme to arise from analysis was that parents and caregivers, and indeed their broader families and communities, had a distinctly different expectation of partnership to that of the government policy. Drawing on social exchange theories, the differences identified were concerned with the asymmetry and reciprocity. Indigenous communities are asserting the right to negotiated agreements that are accountable ‘both ways’ and governments seem to be more focussed on a ‘one way’ process of making Indigenous people accountable for education failure. 相似文献
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Richard D. Carter Rhea S. Das Andrea H. Garnello Richard C. Charboneau 《Research in higher education》1984,20(2):167-179
The analysis of salary equity-parity in institutions of higher education typically involves the use of multiple regression analysis to determine predicted salary and the residual differences between predicted and actual salary. Multiple regression analysis forces the variable weights throughout the salary structure to be uniform, permits only one criterion or dependent variable to be examined at a time, restricts the coordinates to those provided by the variables as measured, and as customarily used, treats qualitative or discrete variables as if they were continuous, assuming ordinality of the numbers used. Two multivariate alternatives to regression analysis are presented, canonical analysis and multiple discriminant analysis, both of which define new coordinate systems for evaluation of dimensions underlying salary decisions.Presented at the 23rd Annual Forum of the Association for Institutional Research, Toronto, May 1983. 相似文献
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This study examined the extent to which the biological sex of nurse‐physician interactants related to the interpersonal communication satisfaction experienced by the nurse. The sample included 153 male and female nurses. Results indicated that same‐sex interactions are more satisfying for female nurses, while mixed‐sex interactions are more satisfying for male nurses. Nurses reported greater communication satisfaction when interacting with female physicians. 相似文献
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Rhea Brettell William Martin Stephanie Atherton-Woolham Ben Stern Lidija McKnight 《文物保护研究》2017,62(2):68-82
Vast numbers of votive mummies were produced in Egypt during the Late Pharaonic, Ptolemaic, and Roman periods. Although millions remain in situ, many were removed and have ultimately entered museum collections around the world. There they have often languished as uncomfortable reminders of antiquarian practices with little information available to enhance their value as artefacts worthy of conservation or display. A multi-disciplinary research project, based at the University of Manchester, is currently redressing these issues. One recent aspect of this work has been the characterization of natural products employed in the mummification of votive bundles. Using gas chromatography–mass spectrometry and the well-established biomarker approach, analysis of 24 samples from 17 mummy bundles has demonstrated the presence of oils/fats, natural waxes, petroleum products, resinous exudates, and essential oils. These results confirm the range of organic materials employed in embalming and augment our understanding of the treatment of votives. In this first systematic initiative of its kind, initial findings point to possible trends in body treatment practices in relation to chronology, geography, and changes in ideology which will be investigated as the study progresses. Detailed knowledge of the substances used on individual bundles has also served to enhance their value as display items and aid in their conservation. 相似文献
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The relationship between childhood adversity and adult depression is well-established but less is known about the association between childhood adversity and adult depression among the incarcerated. In this paper, we examine differential exposure and vulnerability to childhood adversity by race/ethnicity and gender on adult depression among the incarcerated in the United States. We address three research questions: does exposure to childhood adverse experiences vary by race/ethnicity and gender? Is there an association between these childhood adverse events and depression and does the strength of the association vary by the specific adverse experiences? And does vulnerability to childhood adversity vary by gender and race/ethnicity? Using the 2004 Survey of Inmates in State and Federal Correctional Facilities (SI-SFCF), we measure four key childhood adverse events – parental/caretaker substance abuse, physical assault, having been placed in foster care, and sexual assault. We use ordinary least squares regression and a series of interaction effect analyses to examine differential exposure and vulnerability to the four childhood adverse experiences by race/ethnicity and gender. Incarcerated women are more likely to report parental substance abuse, but all inmates/prisoners are similarly vulnerable to this experience. For the other three adverse experiences measured, we find that there are important racial/ethnic and gender differences in both exposure and vulnerability. African American men and women are more vulnerable to the effects of physical and sexual victimization than White and Hispanic men and women. Women are much more likely to be exposed to sexual victimization, but men who report this experience are significantly more depressed. Hispanic women and White men and women are more likely to report foster care, but all inmates/prisoners who report foster care experiences are significantly more depressed than other inmates/prisoners, with the exception of white men. The findings indicate that there are significant differences in exposure and vulnerability to childhood adversity by race/ethnicity and gender. We conclude that in order to effectively design and implement programs to decrease the probability that childhood adversity is a risk factor for adult depression interventions must be targeted toward specific, vulnerable groups according to race/ethnicity and gender. 相似文献
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