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Michael Clemens Rumpf John Cronin Jonathan Oliver Michael Hughes 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(3):256-263
The purpose of this study was to quantify the reliability of kinematic and kinetic variables using a sample of pre-peak-height-velocity (PHV) male athletes sprinting on a non-motorised treadmill. Following variables were measured and their normative data presented, average and peak velocity, average and peak power, average and peak horizontal force, average and peak vertical force, average step frequency, average step length, average work. Twenty-five participants performed three 5-s all-out sprints from a standing split start on a non-motorised treadmill on three separate occasions. Per cent change in the means (-3.66 to 3.35%) and coefficients of variation (0.56–7.81%) were thought reliable for all variables. However, average step rate, average horizontal force and average vertical force did not meet the standards (≥0.70) set for acceptable intraclass correlation coefficients (ICC). Due to the homogeneous group, it was expected to receive low ICC values. Therefore, youth sprinting performance can be tested reliably on a non-motorised treadmill, especially if the per cent change in the mean and CV are deemed the important reliability measures. Normative data are given for the participant’s age as well as their maturity level for kinematic and kinetic variables. 相似文献
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Jonathan Buehl 《Technical Communication Quarterly》2014,23(3):184-206
Over the past two decades, scientific editors have attempted to correct “mistaken” assumptions about scientific images and to curb unethical image-manipulation practices. Reactions to the advent and abuse of image-adjustment software (such as Adobe Photoshop) reveal the complex relations among visual representations, scientific credibility, and epistemic rhetoric. Perelman and Olbrechts-Tyteca's model of argumentation provides a flexible system for understanding these relations and for teaching students to use scientific images ethically and effectively. 相似文献
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We report a multidimensional test that examines middle grades teachers’ understanding of fraction arithmetic, especially multiplication and division. The test is based on four attributes identified through an analysis of the extensive mathematics education research literature on teachers’ and students’ reasoning in this content area. We administered the test to a national sample of 990 in‐service middle grades teachers and analyzed the item responses using the log‐linear cognitive diagnosis model. We report the diagnostic quality of the test at the item level, mastery classifications for teachers, and attribute relationships. Our results demonstrate that, when a test is grounded in research on cognition and is designed to be multidimensional from the onset, it is possible to use diagnostic classification models to detect distinct patterns of attribute mastery. 相似文献
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Jonathan Gray 《Critical Studies in Media Communication》2017,34(1):79-83
Audience measurement data are increasingly central to what many media corporations produce, yet much of these data are inaccessible to scholars. I therefore argue that cultural studies is in need of an audience studies revival. Fan studies continues at strength, but a wider range of audience studies is required to counter and to interrogate the occasional proclamations that companies such as Netflix, Facebook, and Google share with us about audiences and users. 相似文献
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Assessment,and the literacy practices of trainee PCET teachers 总被引:1,自引:0,他引:1
Jonathan Tummons 《International Journal of Educational Research》2008,47(3):184-191
Drawing on concepts of learning as socially situated within communities of practice and of literacy as social practice (the New Literacy Studies), this paper seeks to explore the assessment practices of a part-time teacher training course for teachers working in the post-compulsory education and training sector. This paper argues that the ways in which student teachers make sense of the assessment requirements of their course is not related to their prior experiences as students or as teachers, contradicting notions of transferable study skills. This paper also posits a conceptual framework for exploring the assessment process that seeks to reconcile assessment and pedagogy with the community of practice model. 相似文献