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Harry F. Dorrell Joseph M. Moore Mark F. Smith Thomas I. Gee 《Journal of sports sciences》2019,37(1):67-73
This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz). Least products regression were used to compare agreeability between devices. A within-trial one-way ANOVA, typical error (TE; %), and smallest worthwhile change (SWC) were used to assess reliability. Regression analysis resulted in R2 values of >0.85 for all variables excluding deadlift mean velocity (R2 = 0.54–0.69). Significant differences were observed between visits 3-2 for bench press bar displacement (0.395 ± 0.055 m; 0.383 ± 0.053 m), and deadlift bar displacement (0.557 ± 0.034 m; 0.568 ± 0.034 m). No other significant differences were found. Low to moderate TE (0.6–8.8%) were found for all variables, with SWC ranging 1.7–7.4%. The data provides evidence that the GPT can be used to measure kinetic and kinematic outputs, however, care should be taken when monitoring deadlift performance. 相似文献
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R. Clarke Fowler 《Journal of Early Childhood Teacher Education》2017,38(2):150-163
This study explores the relationship between grade-level overlap between elementary education (ELED) and early childhood education (ECED) licenses and ECED teacher output. Analysis of Title 2 data indicates that ECED/ELED overlap is extensive, as evidenced by the number of states with grade-level overlaps of 5 (n = 2), 4 (n = 24), 3 (n = 10), and 2 years (n = 7). In the 47 states with both types of credentials, ELED licensees may teach preschool in two states, kindergarten in 30, first grade in 41, second grade in 42, and third grade in 43. The percentage of ECED (relative to ELED) teacher licensure program completers is low in states where elementary licenses begin in preschool (5%), kindergarten (14%), and Grade 1 (23%), but higher in states where elementary licenses begin in Grades 2 (45%), 3 (44%), and 4 (70%). 相似文献
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Philip G Barker Harry Yeates 《British journal of educational technology : journal of the Council for Educational Technology》1981,12(2):158-175
Education is intimately associated with communication, and so may utilize any technology that is able to support a process that enables information to be transferred from one location to another. This paper describes the meaning of the term multi-media data base and presents a model of its potential role in aiding message creation for the purposes of communicating educational material using many parallel channels. Some of the problems associated with the implementation of such systems are outlined. 相似文献
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