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Brian Kahin J.D. 《Archives and Museum Informatics》1988,2(2):35-35
Research Affiliate, Research Program on Communications Policy M.I.T., 254 Concord Ave, Cambridge, MA 02138 相似文献
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This article presents findings from a one–year research project undertaken by experienced researchers and practitioners from the University of Strathclyde. Eleven comprehensive schools in Scotland were involved and the aim of the study was to evaluate the effectiveness of in–school support systems for young people who display challenging behaviour. Pupil Support Bases (Pupil Referral Units) had been set up in most of the schools aimed at reducing exclusion rates and these were examined from the perspective of all stakeholders – teachers, parents, young people and key inter–agency personnel. The specific focus of this article is the views of the young people who, although often perceived as disruptive, disaffected and troubled, were surprisingly articulate. They had clear messages for all professionals and, in this article, Paul Hamill, Head of the Department of Educational Support and Guidance, and Brian Boyd, a Reader in the Language Education Department, ensure that their voices are heard. 相似文献
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Chiu LZ Schilling BK Fry AC Salem GJ 《Sports biomechanics / International Society of Biomechanics in Sports》2008,7(2):260-273
For simplicity of biomechanical analyses, the weightlifting barbell is typically modelled as a rigid, nondeformable object. Most coaches and weightlifters, however, are aware of the elastic nature of the barbell, and its influence on the successful completion of lifting attempts. Variables such as velocity, work performed, and power output are indicators of the quality of performance during the snatch, clean, and related weightlifting pulling movements. The aim of this study was to establish whether differences exist in determining these biomechanical parameters when the centre of the barbell is analysed compared with each end of the barbell. Nine men performed three maximal-effort repetitions in the clean pull exercise at 85% of their self-reported single repetition maximum (1-RM) clean (90-155 kg) using a barbell instrumented for mechanical analysis. Results indicated that peak barbell speed was 5-30% (P < 0.05) lower for the centre of the barbell than the ends. Although differences (P < 0.05) in kinetic and potential energy were found between the centre and ends of the bar, differences between total work performed were small (< 6%; P < 0.05) and no differences were observed for average power (P > 0.05). Although approximately the same work and power occur for the centre and ends of the barbell, they manifest as different kinematics as a result of the elastic nature of the equipment. The elastic characteristics should be considered when selecting instrumentation and variables for research involving barbells. Coaches should be aware of the elasticity of barbells, including selecting appropriate viewing angles as well as understanding how deformation may affect the ends of the barbell relative to the centre. 相似文献
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Brian Stephenson 《Early Childhood Education Journal》1992,20(2):40-40
Brian J. Stephenson writes fiction for and about young children, and he lives in Chicago, IL. 相似文献
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