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Hitting a major league fastball, with approximately half a second to react, poses one of the greatest challenges in sports.
The ability to hit the ball derives from the dynamics of the bat swing which can be measured using video motion capture. However,
doing so necessitates swinging the bat within the confines of a motion capture laboratory, often with considerable time and
expense. This paper introduces an inexpensive and highly portable measurement method for use right on the field of play to
support player training, coaching, rehabilitation, and player-bat fitting. The method employs a highly miniaturized, wireless
MEMS inertial measurement unit (IMU) affixed to the knob of the bat. The IMU incorporates three-axis sensing of bat acceleration
and angular velocity with a low-power RF transceiver to transmit this data to a host computer. Analysis of this data yields
a near-instantaneous and highly resolved summary of three-dimensional bat dynamics. This paper describes this novel technology
for use in baseball and softball, presents example results, and reveals new features of bat motion overlooked in previous
studies. 相似文献
73.
V L Perkins 《Journal of learning disabilities》1988,21(4):244-248
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75.
Ariel R. Hart Rebecca Dillard Molly M. Perkins Camille P. Vaughan Kathy Kinlaw J. Lucas McKay 《Educational gerontology》2017,43(9):440-450
The DREAMS Team research advocacy training program helps clinical faculty and health students introduce basic clinical research concepts to diverse older adults to galvanize their active involvement in the research process. Older adults are frequently underrepresented in clinical research, due to barriers to participation including distrust, historical mistreatment, and their lack of health literacy. The DREAMS Team program aims to involve diverse older adults throughout all phases of research and increase research participation, thereby contributing to the growth of quality patient-centered, evidence-based health care. This course was developed for clinical faculty to deliver to diverse adults aged 55+ in eight 50-minute lectures, followed by half-hour small group discussions moderated by health students. A pilot cohort of 24 individuals was assessed for satisfaction post-program, and self-efficacy before and after the program. Older adult participants improved on a survey measure of self-efficacy, and indicated satisfaction on a post-program questionnaire. All agreed or strongly agreed that they enjoyed participating, and that classes enhanced knowledge/skills about the topics, were high quality, and provided useful information. Twenty-two out of 24 individuals who completed the program indicated they planned to get involved as research advocates. The DREAMS Team program can be offered either on its own, or as a follow-up program to a general health education course led by health students and/or professional researchers or clinicians. Educating older adults about the research process and advocacy through interactive seminars led by congenial and respectful researchers and health students may remove some barriers to research participation and involvement among diverse older adults. 相似文献
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Tasha Perkins 《Educational Studies A Journal of the American Educational Studies Association》2015,51(4):317-336
In recent reform efforts, school–community partnerships have been touted as a means for promoting student success (Decker, Decker, &; Brown 2007; Epstein 2010) and meeting student needs (Hands 2010). Yet, despite any accolades, the motives and results of school–community partnerships are contested. Gary Anderson (1998) points out that partnerships tend to be designed to graft members into prior objectives and goals instead of being designed to facilitate staff members in working together to redefine goals. Auerbach (2010) echoes this concern, suggesting that the literature regarding school partnerships focuses primarily on academic achievement while operating under “limited school agendas or mandates for collaboration” which do little to promote “socially just” schools (p. 729). And, schools are egregiously unjust. Thus, in this article, I first evaluate the school–community partnership in a new light by broadly conceptualizing how community exists as a term within the public education system and considering the impact of the historical situatedness of communities and political lines on renderings of community. Second, I offer an understanding of how school–community partnerships are discussed in terms of doublespeak, illustrating how the very word community can be employed across a spectrum of different meanings, interpretations, and implications. Last, I argue that community partnerships have been promoted as educational reform with little prospect of challenging meta-narratives that tell a story of who has something to offer to our schools and who does not. 相似文献
78.
萨如拉 《内蒙古科技与经济》2009,(8):20-21
文章结合牙克石——扎兰屯220KV输变电工程、海拉尔——扎赉诺尔220KV输变电工程、海拉尔——伊敏220KV输变电工程、扎兰屯——尼尔基220KV输变电工程等十多项榆变电工程施工管理经验,围绕工程质量管理这一课题,进行了探讨。 相似文献
79.
本调查以中央民族大学部分本科学生为研究对象,以《人力资源开发与管理》、《职业生涯规划》两门公选课为采样项目,测量学生对教师授课满意度的17个项目并对其进行了因子分析,得到知识传递、授课支持和课堂氛围共三个公因子。回归分析表明,学生对教师的整体评价受到三个公因子的共同影响,学生的学习效果受到授课支持和课堂氛围的共同影响,而学生学习的积极性不受三个公因子的影响。Abstract: An investigation was conducted by taking some students in Minzu University of China as subjects and two selective courses of "Human Recourse Development " and "Management and Career Planning"as sample projects.Afterwards,a factor analysis of students’satisfaction with teaching was made in 17 items,which revealed three common factors: knowledge transmission,instruction support and classroom atmosphere.A regression analysis showed that students’overall evaluation of a teacher is influenced by all the three factors,and that their learning effect is influenced by both instruction support and classroom atmosphere,whereas their enthusiasm is influenced by neither of the three. 相似文献
80.