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Relying on cultural transmission, social identity and self-categorization theories, this study uses an innovative two-part photo-pasting and survey method to investigate quantitatively and qualitatively non-fans’, fans’ and players’ assumptions about what positions black and white players should occupy in American football. Both white and black players and fans showed evidence of being cultural transmitters of racial ideologies associated with the quarterback position in American football. Overall, the respondent choices for quarterback diverged significantly from equality but not significantly from the reality of the National Football League. Players and fan and non-fan participants alike showed evidence of being cultural consumers and transmitters of racial ideologies associated with the quarterback position. Narrative reasons for player choices aligned with past literature about racial stereotypes. On most measures, the findings did not differ greatly among the institutions from which study participants were drawn, their diversity in geography, racial composition, ideology, athletic division and public–private status notwithstanding. 相似文献
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The application of advanced engineering to tennis racket design has influenced the nature of the sport. As a result, the International Tennis Federation has established rules to limit performance, with the aim of protecting the nature of the game. This paper illustrates how changes to the racket affect the player-racket system. The review integrates engineering and biomechanical issues related to tennis racket performance, covering the biomechanical characteristics of tennis strokes, tennis racket performance, the effect of racket parameters on ball rebound and biomechanical interactions. Racket properties influence the rebound of the ball. Ball rebound speed increases with frame stiffness and as string tension decreases. Reducing inter-string contacting forces increases rebound topspin. Historical trends and predictive modelling indicate swingweights of around 0.030–0.035 kg/m2 are best for high ball speed and accuracy. To fully understand the effect of their design changes, engineers should use impact conditions in their experiments, or models, which reflect those of actual tennis strokes. Sports engineers, therefore, benefit from working closely with biomechanists to ensure realistic impact conditions. 相似文献
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David D. Williams Joseph B. South Stephen C. Yanchar Brent G. Wilson Stephanie Allen 《Educational technology research and development : ETR & D》2011,59(6):885-907
This study employed a qualitative research design to investigate how instructional designers use evaluation in everyday design
practice. While past research has examined how designers spend their time, how they generally make decisions, and expert-novice
differences, little attention has been paid to use of context, input, process, or product evaluation, from the perspective
of practicing designers. Based on interviews of practitioners, our findings included ten themes regarding how designers use
evaluation to improve their products. While these results substantiate to some degree the claim that practitioners believe
clients will not pay for formal evaluations, they also suggest that practitioners use evaluation in important but less formal
ways. Other conclusions regarding the role of evaluation in design are provided and future directions for training and research
are discussed. 相似文献
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