The effectiveness of a learning disabilities inservice program

Forty-three regular classroom teachers were provided with four one-hour inservice sessions related to the field of learning disabilities. Pre- and posttest administrations of the Learning Disabilities Information Inventory were utilized to measure change resulting from these sessions. Twenty-four control subjects did not participate in these sessions but did complete the dependent measure. An analysis of covariance with pretest scores serving as the covariate indicated that the inservice treatment did result in improved performance on the dependent measure. Approximately 50% of the experimental subjects completed a follow-up questionnaire and most indicated that the sessions increased their knowledge of learning disabilities and provided them with techniques and materials useful in their classroom settings. It is concluded that such inservice sessions are a viable means of increasing classroom teachers' information concerning learning disabilities and the Learning Disabilities Information Inventory is sensitive to the effects of such inservice.     

Asian Martial Arts: The Anarchic Legacy of the War Machine

Abstract

The renaissance of Asian martial arts is a conspicuous example of cultural hybridity in a global setting. Globalization brings these arts under the dual sway of cinema and sport to a degree unprecedented in their history. This pull, which I describe in terms from Deleuze and Guattari as deterritorialization, creates new challenges for Asian martial arts practice. To explore these challenges and their stakes, I demonstrate the relevance of the concept of the war machine from Deleuze and Guattari, and discuss their distinction between weapons and tools as it bears on Asian martial arts history and practice.     

A review of tennis racket performance parameters

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.