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51.
Kevin King N. C. Perkins Hugh Churchill Ryan McGinnis Ryan Doss Ron Hickland 《Sports Engineering》2011,13(2):95-104
This paper presents a novel sensor technology to deduce the dynamics of a bowling ball. The sensor, a miniature wireless inertial
measurement unit (IMU), incorporates MEMS accelerometers and angular rate gyros, a microcontroller, a low power RF transceiver,
and a rechargeable battery. When embedded in a bowling ball, the IMU transmits the acceleration and angular velocity data
that define the dynamics of the ball starting with the bowler’s delivery and its motion in the lane. Example results from
professional bowlers illustrate how this technology can be used to assess bowler skill and ball performance. For instance,
the IMU accurately measures the spin dynamics of the ball which are crucial to develop the ball “hook.” An analysis of ball
dynamics in the lane is distilled to a measurable “hook potential” metric for further assessing bowler skill. Finally, the
sensor presented herein is believed to be the world’s smallest, wireless IMU. This highly miniaturized and wireless design
will enable parallel training systems for many sports, including basketball, baseball, crew, cricket, golf, fly fishing, soccer,
softball, tennis, rowing, among others. 相似文献
52.
Greene NP Greene ES Carbuhn AF Green JS Crouse SF 《Research quarterly for exercise and sport》2011,82(2):264-273
We compared cardiorespiratory responses to exercise on an underwater treadmill (UTM) and land treadmill (LTM) and derived an equation to estimate oxygen consumption (VO2) during UTM exercise. Fifty-five men and women completed one LTM and five UTM exercise sessions on separate days. The UTM sessions consisted of chest-deep immersion, with 0, 25, 50, 75, and 100% water-jet resistance. All session treadmill velocities increased every 3 min from 53.6 to 187.8 m x min(-1). Cardiorespiratory responses were similar between LTM and UTM when jet resistance for UTM was 50%. Using multiple regression analysis, weight-relative VO2 could be estimated as: VO2 (mLO2 c kg(-1) x min(-1)) = 0.19248 x height (cm) + 0.17422 x jet resistance (% max) + 0.14092 x velocity (m x min(-1)) -0.12794 x weight (kg)-27.82849, R2 = .82. Our data indicate that similar LTM and UTM cardiorespiratory responses are achievable, and we provide a reasonable estimate of UTM VO2. 相似文献
53.
All women should be allowed and encouraged to bring a loved one, friend, or doula to their birth without financial or cultural barriers. Continuous labor support offers benefits to mothers and their babies with no known harm. This article is an updated evidence-based review of the “Lamaze International Care Practices that Promote Normal Birth, Care Practice #3: Continuous Labor Support,” published in The Journal of Perinatal Education, 16(3), 2007. 相似文献
54.
This paper describes 3 language learning approaches common in many urban and rural Ojibwe communities, as well as the ideologies of endangerment that drive and sustain them. Drawing from collaborative language revitalization work with teachers, learners, and community leaders, we analyze some of the teaching and learning practices that lead to the common mismatch between language learner goals and expectations, on the one hand, and the outcomes of language learning, on the other. We outline how these 3 approaches to language learning relate to cultural identities and place-based notions of authenticity as well as to current findings in the field of second language acquisition. We then profile 2 speakers who have learned Ojibwe successfully as adults to illustrate how their success was possible largely because they were able to engage with the Ojibwe language in interactive ways that run counter to common language learning approaches. We suggest that for language revitalization efforts, and individual learners, to experience higher levels of success, greater attention needs to be paid to how ideologies of endangerment impact language learning approaches. 相似文献
55.
Christina L. Jones Robin E. Jensen Abigail Selzer King 《American journal of sexuality education》2014,9(4):464-484
Instructors of sexual health courses in rural areas face unique challenges as they are often forced to use school-based prevention curricula field-tested in urban areas. Research has yet to consider what future sex educators’ regional expectations are for their profession and how those expectations might have an impact on the classroom. Drawing from interviews with 26 sex-educators-in-training, we find that future educators tended to expect that rural communities would be less diverse, more conservative, and less informed about sexual health matters, even though research demonstrates that today's rural communities inconsistently align with those perceptions. 相似文献
56.
Wanta Wayne; King Pu-tsung; McCombs Maxwell E. 《Int. Journal of Public Opinion Research》1995,7(4):353-365
The study extends agenda-setting research by examining issuediversity as a consequence of media exposure. Results from twosurveysone conducted in the United States, the otherin Taiwanillustrate differences in the cultures of thetwo samples. In general, older individuals who find low utilityin advertising information but who read a variety of newspapersand feel a strong civic duty to keep informed believe thereare many important issues facing the United States. Younger,highly educated individuals who have a high interest in politicalnews and who read a variety of newspapers believe there aremany important issues facing Taiwan. 相似文献
57.
Demand for and productivity analysis of Turkish public theater 总被引:1,自引:0,他引:1
We estimate a demand function for live theater provided by the General Directorate of State Theaters in Turkey. We show that demand is more elastic in less developed cities, that attendance is not significantly affected by various qualitative variables, and that the government's practice of offering free passes to government officials is an ineffective way of increasing paid attendance. Comedies and musicals both show significantly higher attendance. Having a Turkish author does not significantly affect attendance. Having a known author significantly increases attendance for more developed cities but not for less developed cities. Being the opening season significantly reduces attendance in less developed cities but has no effect in more developed cities. We also present evidence of inefficiency in state theaters in Turkey through a performance of plays equation in which we evaluate the determinants of the number of performances per play. 相似文献
58.
59.
David L. Green 《The Urban Review》1992,24(1):39-54
Three vocational high schools provide illustrative and contrasting histories in terms of African-American education and economic opportunity. Washburne Trade School reinforced trade union exclusion of African-Americans, and since integration in the 1960s has been abandoned by most of the powerful unions. Dunbar Vocational High School directed African-Americans into the lower-paying trades, but has lost the economic base that the ghetto once provided. Chicago Vocational School prepared the white working class for industrial jobs, but integration and re-segregation has coincidentally seen the erosion of Chicago's manufacturing base. These schools are compared in the economic, political, and cultural contexts of past and present. It is proposed that an integrated strategy for the reform of vocational education is necessary for these schools to adapt to economic change in the present and future. 相似文献
60.