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Otto D. Harris III 《The Urban Review》2012,44(3):332-357
Are Historically Black Colleges and Universities (HBCUs) necessary in the twenty-first century so-called ??post-racial?? US American context? This question is raised loudly and frequently given the contemporary social climate and economic considerations. In this article, the author offers a response to and critique of this question and surveys histories, missions, and academic and social environments of the HBCUs. He contends that HBCUs offer alternate higher education experiences for Black educators and students who find themselves on the margins of the US American academic center. Demonstrating the parallels of HBCU settings to villages, the author illustrates how these HBCU village contexts contribute to pedagogy. Ultimately, he appeals to HBCU stakeholders to intentionally and consistently promote ??village?? environments to cultivate the academic and social sensibilities of its constituents. 相似文献
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Abstract Previous studies have shown that the start plays a critical role in sliding events and explains more than 55% of the variance of the final time in luge. Experts evaluate the contribution of the arm strokes to be 23% of the total starting performance. The aim of the present study was to develop a measurement and feedback training tool (Speedpaddler) for the arm strokes of high-performance luge athletes. The construction is an aluminium alloy framework with a customary belt conveyor system, which is driven by two synchronized servo motors. Training is possible with constant speeds up to 12 m · s?1 or several speed curves, which simulate the acceleration of different luge tracks. The construction facilitates variations in the inclination and speed of the conveyor belts and thereby the resistance and movement speed. If the athlete accelerates the conveyor belts during arm-paddling, the torque of the motors decreases. Torque measurements and high-speed video offer valuable insights into the several technique criteria. Comparisons of arm-paddle cycle durations on ice and on the Speedpaddler with 18 luge athletes (national team and juniors) showed no statistical differences. The Speedpaddler might be a useful tool to improve starting performance all year round. 相似文献
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Susan A. Everett Gail R. Luera Charlotte A. Otto 《International Journal of Science and Mathematics Education》2008,6(1):1-17
The goal of this study was to examine the two related links of research to teaching practice and teaching practice to research that pre-service elementary teachers made during an action research project focusing on a conceptual-change teaching experience
with elementary school students. Data were collected from the final written reports from 144 groups of students. Analysis
of the data by the process of grounded theory showed that the majority of students (96%) were able to link current educational
research successfully to their teaching practice while fewer students (16%) were able to link their teaching practice back
to the research base. Many students (30%), however, found new knowledge in the form of identifying new misconceptions or finding
previously reported misconceptions with new populations or confirming prior research. Preliminary results (n = 17) based on the changes to the course showed significant improvement. 相似文献
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The static and dynamic stiffness behaviour of composite golf shafts and their constituent materials 总被引:1,自引:1,他引:0
Nils F. Betzler Carl Slater Martin Strangwood Stuart A. Monk Steve R. Otto Eric S. Wallace 《Sports Engineering》2011,14(1):27-37
Golf shafts are normally characterised using static or quasi-static tests, yet the golf swing itself is dynamic. The purpose
of this research was to determine whether stiffness properties obtained from these tests can be used when modelling the dynamic
behaviour of golf shafts made from carbon fibre reinforced polymer (CFRP). Three shafts, matched for all properties except
shaft flex, were subjected to human swing testing by 12 skillful players whilst strains were recorded. Peak principal strains
as well as strain rates increased as shaft flex decreased (p < 0.001). CFRP flat panels with lay-ups similar to those contained in the shafts were constructed and tested statically and
at strain rates between 10−4 and 4 s−1. Some level of strain-rate dependency was found for these panels, but only for strain rates exceeding those seen during a
swing, which suggests that static material tests are appropriate for measuring the dynamic stiffness of golf shafts. 相似文献
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