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71.
Carlos Balsalobre-Fernández Gretchen Geiser John Krzyszkowski Kristof Kipp 《Journal of sports sciences》2020,38(6):710-716
ABSTRACTThe purpose of this study was to investigate the validity of a smartphone app to measure biomechanical barbell parameters during the snatch. Ten collegiate NCAA division I athletes performed two repetitions each at 40, 50, 60, 70, and 80% of their 1-repetition maximum snatch. Barbell motions were simultaneously recorded with a motion capture system and the smartphone app. The motion capture system recorded the 3-D position of a reflective marker attached to the end of the barbell while the smartphone app was used to record sagittal plane video and track the shape of the weight plate from which the barbell center was derived. Peak forward (PFD) and backward (PBD) displacements and peak vertical displacement (PVD) and velocity (PVV) were calculated from both sets of data. Significant, strong to very strong Pearson’s product-moment correlation coefficients between both systems were noted for all parameters (r = 0.729–0.902, all p < 0.001). Small significant biases between systems were observed for PVD (ES = 0.284, p < 0.001) and PFD (ES=0.340, p < 0.01), while trivial to small, non-significant biases were observed for PBD (ES = 0.143) and PVV (ES = –0.100). Collectively, the results suggest that the app can provide biomechanical data of barbell motions similar to a 3-D motion capture system. 相似文献
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Gretchen Oltman 《Clearing house (Menasha, Wis.)》2017,90(5-6):172-176
Survival for public school teachers goes beyond curriculum design, discipline and other skills. School law is critical for teachers to face the areas of challenge that are currently present. There are two types of common legal mistakes made by teachers: a) failing to take disciplinary action when they should, and b) unintentionally violating students rights. Social media, religion, the rights of transgender students and the possibility of teachers right to carry a weapon are all within the realm of rapidly changing public school law. Teachers should stay well-informed, so they are ready to protect students and their own constitutional freedoms. 相似文献
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Covering violence is an expected part of the daily job for many journalists in the United States; however, are college and university programs fully preparing students for what they may experience? This study surveyed accredited journalism schools in the United States. Of the 41 respondent schools, only one offered a course specifically aimed at teaching journalists how to protect themselves from psychological trauma and how best to interact with victims of trauma. Results show that although schools believe the topic of trauma is important and worth teaching to future journalists, the approach to the topic is mostly reactive and inconsistent. Implications for the future of journalism education are discussed. 相似文献
75.
Scores on state standards‐based assessments are readily available and may be an appropriate alternative to traditional placement tests for assigning or accepting students into particular courses. Many community colleges do not require test scores for admissions purposes but do require some kind of placement scores for first‐year English and math courses. In this study, we examine the efficacy of using the reading and math portions of the Kansas State Assessment (KSA) for predicting the success of high school students taking College Algebra and College English I at a Kansas community college. Results showed that in this sample KSA scores predicted as well or better than more traditional placement tests and with no extra cost to the institution. 相似文献
76.
Gretchen Soderlund 《The Communication Review》2013,16(3):307-327
This essay explores the use of Walter Lippmann’s ideas in three areas of mass communications research: message-driven media effects research and related studies of agenda setting, priming, and framing; social histories of U.S. journalism, advertising, and public relations; and interpretive accounts of the field’s genesis. It offers a new understanding of the role Lippmann played in yoking together a range of communication-related issues under a single problematic. In the process it exposes a critical lacunae stretching across (and beyond) scholarship in communications research: a lack of attention to the rhetorical deployment of Lippmann, characterized by an inclination to endow this figure’s political philosophy with the power to stand in for a range of developments occurring across an emerging communications field. This essay addresses the implications of being positioned to speak not only for a field of research but for history as well, being able to so perfectly mirror shifts in cultural attitudes and emerging institutional practices. 相似文献
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Gretchen Whitney 《Publishing Research Quarterly》1990,6(3):44-75
The Unesco Statistical Yearbook includes in its annual volumes tables reporting the number of books published by countries
in subject classes according to the UDC classification system. These statistics are examined to assess global trends in subjects
areas such as pure, social, medical, and applied sciences, and literature. Data from Asia, Latin America, Africa, and North
America are found to be highly inconclusive due to nonreporting patterns. Data from Europe and the USSR are more comprehensive.
According to these data, social science titles form the largest percentages of the world's production, followed by applied
sciences and literature. Overall, literature and medical science titles appear to be increasing in production faster than
other subject areas.
Gretchen Whitney is an assistant professor at the Graduate Library School of the University of Arizona and author ofLanguage Distribution in Databases. She teache in the fields of information science and information policy. 相似文献
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