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Cynthia R. Chambers Michael L. Wehmeyer Yumiko Saito Kerry M. Lida Youngsun Lee Vandana Singh 《Exceptionality》2013,21(1):3-15
Abstract Promoting self-determination has become an important aspect of the educational programs of students with disabilities. There is now a sufficient literature base to support some syntheses that enable researchers to judge their progress in this area to date and to provide direction for future research and practice. For this study, we conducted a literature review of studies that measured or examined global self-determination. 相似文献
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Sequential muscle activity and its functional role in the upper extremity and trunk during overarm throwing 总被引：1，自引：1，他引：0
The proximal-to-distal segmental sequence has been identified in many sports activities, including baseball pitching and ball kicking. However, proximal-to-distal sequential muscle activity has not been identified. The aims of this study were to establish whether sequential muscle activity does occur and, if it does, to determine its functional role. We recorded surface electromyograms (EMGs) for 17 muscles from the upper extremity and abdomen during overarm throwing and detected the onset and peak times as indices of muscle activity. The following electromyographic properties were commonly identified in the participants. First, sequential muscle activity was observed from the scapular protractors to the shoulder horizontal flexors and from the shoulder horizontal flexors to the elbow extensor, but not from the elbow extensor to the wrist flexor or forearm pronator. Secondly, the external oblique contralateral to the throwing arm became activated before the ipsilateral external oblique. This sequence is considered to be very effective for the generation of high force and energy in the trunk. Thirdly, the ipsilateral external oblique began its activity almost at foot strike. Finally, the main activity of the rectus abdominis appeared just before the point of release. 相似文献
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Christine McWayne Virginia Hampton John Fantuzzo Heather L. Cohen Yumiko Sekino 《Psychology in the schools》2004,41(3):363-377
The primary objective of this study was to obtain a multidimensional picture of parent involvement in kindergarten. Participants in this study were 307 low‐income, ethnic minority children and their primary caregivers in a large, urban school district in the Northeast. Results revealed that kindergarten parent involvement dimensions (i.e., from the Parent Involvement in Children's Education Scale; Fantuzzo, Tighe, McWayne, Davis, & Childs, 2002) were congruent with those established with preschool (Head Start) parents. Multivariate relationships were found between kindergarten parent involvement dimensions and children's social and academic competencies. Parents who actively promote learning in the home, have direct and regular contact with school, and experience fewer barriers to involvement have children who demonstrate positive engagement with their peers, adults, and learning. © 2004 Wiley Periodicals, Inc. Psychol Schs 41: 363–377, 2004. 相似文献
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Koji Murofushi Shinji Sakurai Koji Umegaki Junji Takamatsu 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):301-314
Ground reaction force and wire tensile force were measured during test throws by three hammer throwers: the Asian record holder, who had a personal best of 83.47 m at the time of the investigation, and two university athletes, with personal bests of 59.95 m and 46.30 m respectively. They were filmed using three high-speed video cameras (250 Hz). The displacements of the hammer head and the athletes' centres of mass were calculated using three-dimensional analysis procedures. The Asian record holder's centre of mass and the hammer head on the final two turns exhibited approximate conjunctions of the hammer high point and the thrower's low point and vice versa about the hammer's azimuth angle. It is conjectured that the reason why the thrower's movement is asynchronous with the hammer's movement by approximately half a turn is to accelerate the hammer head in a manner similar to the way that the amplitude of a pendulum increases when it is pulled upward by a string against the downward movement of the swinging weight. 相似文献
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Yumiko Iida 《Inter-Asia Cultural Studies》2013,14(1):56-74
Contemporary Japanese society has seen the emergence of aesthetically conscious young men who employ ‘feminine’ aesthetics and strategies as ways of exploring and practising new masculine identities. In this paper, I explore the significance of this emerging trend of male beauty by observing and analysing the expressions, strategies and intentions of those young men who have taken to aesthetically representing themselves in these ways. This cultural trend is often described as the ‘feminization of masculinity,’ echoing the gendered articulation of rising mass culture in terms of the ‘feminization of culture,’ which acknowledges aspects of the commercialization of masculine bodies in Japan of the 1990s onward. While this view successfully links important issues, such as femininity, beauty, and the gendered representation of the self in a broader context of capitalist culture, it does not sufficiently convey a sense of agency in the young men's lively practices of exploring and expressing new masculine values and ideals. Rather than viewing ‘feminization’ simply as a sign of commodification, I argue that these young men strategically distance themselves from conventional masculinity by artificially standing in the position of the ‘feminine’, where they can more freely engage in the creation of alternative gender identities. From this point of view, the use of the phrase ‘feminization of masculinity’ often implies a fear and anxiety on the part of patriarchy over the boundary‐crossing practice that seriously challenges the stability of gendered cultural hegemony. Moreover, such anxiety driven reactions easily merge with nationalist inclination, as those threatened tend to seek the consolidation of patriarchal/hegemonic order by eliminating ambiguities and indeterminacy in cultural/national discourse. I conclude that the cultural hegemony of contemporary Japan could better sustain itself by incorporating non‐hegemonic gender identities, which would allow it maintain an open space for critical imagination and effectively diffuse an obsessive and ultimately self‐destructive desire for transparency/identity. 相似文献
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Murofushi K Sakurai S Umegaki K Takamatsu J 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(3):301-314
Ground reaction force and wire tensile force were measured during test throws by three hammer throwers: the Asian record holder, who had a personal best of 83.47 m at the time of the investigation, and two university athletes, with personal bests of 59.95 m and 46.30 m respectively. They were filmed using three high-speed video cameras (250Hz). The displacements of the hammer head and the athletes' centres of mass were calculated using three-dimensional analysis procedures. The Asian record holder's centre of mass and the hammer head on the final two turns exhibited approximate conjunctions of the hammer high point and the thrower's low point and vice versa about the hammer's azimuth angle. It is conjectured that the reason why the thrower's movement is asynchronous with the hammer's movement by approximately half a turn is to accelerate the hammer head in a manner similar to the way that the amplitude of a pendulum increases when it is pulled upward by a string against the downward movement of the swinging weight. 相似文献
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Muscle activity and accuracy of performance of the smash stroke in badminton with reference to skill and practice 总被引：1，自引：1，他引：0
The aims of this study were to establish the temporal-spatial relationship between muscle activity and the smash stroke of skilled badminton players and to assess performance accuracy using the ellipse of constant distance. We recorded the surface electromyographic (EMG) activity of selected superficial muscles of the stroking arm and shoulder--flexor carpi ulnalis, extensor carpi radialis, triceps brachii (lateral head), biceps brachii and trapezius (upper)--during the badminton smash. In the first part of the study, we examined the characteristics of muscle function and performance accuracy of skilled and unskilled individuals during the badminton smash. Five well-trained badminton players and five students with no experience of badminton were asked to smash a shuttle as hard as they could towards a vertical square target 4 m away, repeating the stroke 30 times. In general, the skilled players showed a more constant time from peak electromyographic amplitude to impact. Immediately after impact, the electromyographic activity of the triceps brachii and flexor carpi radialis of the skilled players decreased; in the unskilled participants, however, it continued until well after impact. The area of the ellipse of constant distance and the off-target distance, which were used as indices of performance accuracy, were smaller for the skilled than for the unskilled participants. In the second part of the study, one skilled and one unskilled participant performed 100 trials a day for 6 days. The time from peak electromyographic amplitude to impact in the extensor carpi radialis and flexor carpi ulnalis was more variable in the unskilled than in the skilled participant even after 6 days of practice, but the proximal muscles of the unskilled participant had a similar pattern of activity to that of the skilled player. Thus, controlling the distal muscles appears to be important for achieving accurate performance of the smash in badminton. 相似文献
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Shigetada Kudo Yoshihisa Sakurai Takahiro Miwa Yuji Matsuda 《Journal of sports sciences》2017,35(10):945-952
This study re-evaluated the magnitude of hand propulsion (HP) in the pull and push phases of the front crawl stroke and investigated the association between the angular velocity of shoulder roll (ωSR) and hand propulsive lift (HPL). ωSR was computed in the plane normal to a forward direction for 16 skilled swimmers performing the front crawl stroke at a maximal sprinting pace. HP, hand propulsive drag (HPD) and HPL were determined by a dynamic pressure approach. HP and HPD in the pull phase were greater than in the push phase (P < 0.05) while HPL in the pull phase was similar to that in the push phase. Eleven swimmers out of the 16 swimmers had a significant within-swimmers correlation between ωSR and HPL in the push phase (P < 0.05). That is, HPL increased in the push phase as the ωSR of rolling back to the neutral position became faster. A swimmer should use more drag for hand propulsion in the pull phase and propulsion from drag and lift equally in the push phase. Based on the relationship between ωSR and HPL in the push phase, a possible stroke technique to enhance HPL using ωSR is discussed. 相似文献