Measurement of badminton racket deflection during a stroke

The compliance of a badminton racket is an important design consideration, which can be better understood by studying the deflection behaviour of the racket during a stroke. Deflection can be measured using direct methods, such as motion capture or high speed video, or by indirect methods, which then require a mathematical model in order to calculate the deflections from indirect measures. Indirect methods include strain gauges and accelerometers. Here, racket deflection is measured directly using motion capture and compared with deflections calculated from strain gauge data using a beam model. While the elastic behaviour is better calculated from strains than measured by motion capture, it is not possible to extract the whole motion of the racket from strain data. Motion capture is therefore also necessary to determine the rigid body velocity, in order to put the elastic velocity (as calculated from strains) in perspective.     

Keeping them in line: choreographing classroom spaces

This paper provides teachers with an opportunity for thinking about the kinds of ‘people’ constructed in their classes, the kinds of ‘dances’ choreographed and the ways space is organised for learning. We argue that this is essential for teachers to think about if they are to enact socially just professional practices. In this study, we explore the ways in which students learn to be particular kinds of people. We understand this as happening through their participation in communities of practice. Becoming a member of a community of practice, of a classroom and of a school is a process of developing a particular identity, modes of behaviour and ways of knowing. It is through these ‘normalising’ practices that power is constituted, boundaries constructed and certain ‘kinds of people’ are recognised, represented and constituted, whilst others are not. All individuals are implicated in these processes and active in the construction of their own as well as others’ identities. This paper locates this discussion using social relations of gender and ethnicity, and considers how diversity and difference are actively constituted and play out in one primary school classroom. How students participate in the spatial practices and the construction of pedagogical spaces, what identities are available to them in these spaces and which they take up, is explored. The metaphor of dance is used to analyse these spaces, a metaphor which helps us to understand the complexity of classroom relationships and the way macro‐social practices are both reflected and reconstituted in classroom practices. We argue that the ways teachers think about how they place students, space students and construct students are crucial for student and teacher learning.