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Silvia Fantozzi Andrea Giovanardi Fabrício Anício Magalhães Rocco Di Michele Matteo Cortesi Giorgio Gatta 《Journal of sports sciences》2016,34(11):1073-1080
The analysis of the joint kinematics during swimming plays a fundamental role both in sports conditioning and in clinical contexts. Contrary to the traditional video analysis, wearable inertial-magnetic measurements units (IMMUs) allow to analyse both the underwater and aerial phases of the swimming stroke over the whole length of the swimming pool. Furthermore, the rapid calibration and short data processing required by IMMUs provide coaches and athletes with an immediate feedback on swimming kinematics during training. This study aimed to develop a protocol to assess the three-dimensional kinematics of the upper limbs during swimming using IMMUs. Kinematics were evaluated during simulated dry-land swimming trials performed in the laboratory by eight swimmers. A stereo-photogrammetric system was used as the gold standard. The results showed high coefficient of multiple correlation (CMC) values, with median (first–third quartile) of 0.97 (0.93–0.95) and 0.99 (0.97–0.99) for simulated front-crawl and breaststroke, respectively. Furthermore, the joint angles were estimated with an accuracy increasing from distal to proximal joints, with wrist indices showing median CMC values always higher than 0.90. The present findings represent an important step towards the practical use of technology based on IMMUs for the kinematic analysis of swimming in applied contexts. 相似文献
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Michele Seikel 《Journal Of Archival Organization》2016,13(1-2):37-46
This survey of official U.S. tribal websites examined sites for documentary materials of importance to each tribe that have been archived online, including such materials as historical essays, photos, videos, maps, newspapers, legal and historical documents, historical images, books, pamphlets, bibliographies, cultural and language materials. The materials found on those websites appear to be intended for the use of both tribal members and the general public. The result of the survey was to show that many of the same types of documentary materials held in tribal archives are also available on official websites, and to produce a current snapshot of the large array of tribal records which have been made openly available, although the length of time each document will be available on each site is unknown. 相似文献
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Distance education planners face two basic, yet difficult decisions: which students should be targeted and which programs should be offered? This paper reports the process and results of the planning committee of a consortium of engineering schools in the United States that was tasked with these very decisions. A market research study measured the program preferences of potential students. Three program characteristics (course type, delivery method, and time availability) were examined. The results show there is no ‘average’ student and no single program will satisfy all the needs of the student population. Rather, the committee must choose one or more segments based on the program preferences of the students and the resources required to provide the programs. 相似文献
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Engaging by design: How engagement strategies in popular computer and video games can inform instructional design 总被引:2,自引:0,他引:2
Computer and video games are a prevalent form of entertainment in which the purpose of the design is to engage players. Game
designers incorporate a number of strategies and tactics for engaging players in “gameplay.” These strategies and tactics
may provide instructional designers with new methods for engaging learners. This investigation presents a review of game design
strategies and the implications of appropriating these strategies for instructional design. Specifically, this study presents
an overview of the trajectory of player positioning or point of view, the role of narrative, and methods of interactive design.
A comparison of engagement strategies in popular games and characteristics of engaged learning is also presented to examine
how strategies of game design might be integrated into the existing framework of engaged learning.
The preparation of this article was supported in part by the Proctor & Gamble Interactive Media Fellows grant. The ideas expressed
in this paper do not necessarily reflect the position of the grant agency. R Thanks to the ETR&D Development Editor, J. Michael
Spector, and the reviewers for their insightful comments and suggestions. Thanks, too, to John C. Belland and Keith A. Hall
for their advice and mentoring. 相似文献
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PURPOSE: This paper examines individual, family, and neighborhood level predictors of resilience in adolescence and young adulthood and describes changes in resilience over time from adolescence to young adulthood in abused and neglected children grown up. METHOD: We use documented cases of childhood physical and sexual abuse and neglect (n=676) from a Midwestern county area during the years 1967-1971 and information from official records, census data, psychiatric assessments, and self-reports obtained through 1995. Analyses involve logistic regressions, replicated with Mplus to test for possible contextual effects. RESULTS: Almost half (48%) of the abused and neglected children in adolescence and nearly one-third in young adulthood were resilient. Over half of those who were resilient in adolescence remained resilient in young adulthood, whereas 11% of the non-resilient adolescents were resilient in young adulthood. Females were more likely to be resilient during both time periods. Being white, non-Hispanic decreased and growing up in a stable living situation increased the likelihood of resilience in adolescence, but not in young adulthood. Stressful life events and a supportive partner promoted resilience in young adulthood. Neighborhood advantage did not exert a direct effect on resilience, but moderated the relationship between household stability and resilience in adolescence and between cognitive ability and resilience in young adulthood. CONCLUSIONS: Ecological factors appear to promote or interfere with the emergence and stability of resilience following childhood maltreatment. 相似文献
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