Labours of division: Legitimacy, membership and the performance of business knowledge

The idea(l) of ‘legitimate peripheral participation’ remains at the heart of debates over the nature and potential of communities of practice. Yet the question of how the legitimacy or otherwise of participation is actually established is seldom addressed. In this article, we focus on ‘legitimacy’ as figure instead of ground. We attend to the ‘displays of competence’, and their associated ‘labours of division’, by means of which ‘practitioners’ claim recognition and are made recognisable to each other as members, or non-members, of an ‘us’. We seek to understand how members come to recognise particular ‘doings’ and forms of knowledge as belonging (or not belonging) to a particular practice. How is the common ‘domain’ (communis) of practice settled (or un-settled) in the course of specific performances of membership? Empirically, the article draws upon a 2-year investigation of how community of practice boundaries and participation were negotiated in ‘UltraGlass Plc’, a multinational manufacturing company, and specifically of the failure of ‘community’ to cohere around practices

The Inconsistent Work of Web Filters: Mapping Information Access in Alabama Public Schools and Libraries

Recent popular and academic discussions regarding the Internet have raised the question of whether and how networked intermediaries have a (dis)integrating social effects. In this study, we use public records of configurations of Internet filters in Alabama public schools and libraries to show how different institutions implement nominally consistent content standards inconsistently. We argue that these varying implementations are both significant and troubling for two reasons: first, they overreach the stated goals of the legislation with whic h they in principle comply; second, they may contribute to a broader epis temic breakdown by fragmenting the kind of information made available through and across public institutions. Keywords: Internet filtering, filter bubble, censorship, critical infrastructure studies, algorithms, categories, CIPA, libraries, schools, Leigh Sta

The health-enhancing efficacy of Zumba® fitness : an 8-week randomised controlled study

The purpose of this study was to gain a holistic understanding of the efficacy of Zumba® fitness in a community-recruited cohort of overweight and physically inactive women by evaluating (i) its physiological effects on cardiovascular risk factors and inflammatory biomarkers and (ii) its mental health-enhancing effects on factors of health-related quality of life (HRQoL). Participants were randomly assigned to either engagement in one to two 1 h classes of Zumba® fitness weekly (intervention group; n = 10) or maintenance of habitual activity (control group; n = 10). Laboratory assessments were conducted pre- (week 0) and post-intervention (week 8) with anthropometric, physiological, inflammatory and HRQoL data collected. In the intervention group, maximal oxygen uptake significantly increased (P < 0.05; partial η(2) = 0.56) by 3.1 mL · kg(-1) · min(-1), per cent body fat significantly decreased (P < 0.05; partial η(2) = 0.42) by -1.2%, and interleukin-6 and white blood cell (WBC) count both significantly decreased (P < 0.01) by -0.4 pg · mL(-1) (partial η(2) = 0.96) and -2.1 × 10(9) cells · L(-1) (partial η(2) = 0.87), respectively. Large magnitude enhancements were observed in the HRQoL factors of physical functioning, general health, energy/fatigue and emotional well-being. When interpreted in a community-based physical activity and psychosocial health promotion context, our data suggest that Zumba® fitness is indeed an efficacious health-enhancing activity for adults

Effects of zinc supplementation on cognitive function in healthy middle-aged and older adults: the ZENITH study

A randomised double-blind placebo-controlled design was employed to investigate the effects of Zn supplementation on cognitive function in 387 healthy adults aged 55–87 years. Several measures of visual memory, working memory, attention and reaction time were obtained using the Cambridge Automated Neuropsychological Test Battery at baseline and then after 3 and 6 months of 0 (placebo), 15 or 30 mg Zn/d. Younger adults (70 years), and performance improved with practice on some measures. For two out of eight dependent variables, there were significant interactions indicating a beneficial effect (at 3 months only) of both 15 and 30 mg/d on one measure of spatial working memory and a detrimental effect of 15 mg/d on one measure of attention. Further work is required to establish whether these findings generalise to older adults in poorer mental and physical health and with less adequate Zn intake and status than the present sample

Using or abusing? Scrutinising employer demand for temporary sponsored skilled migrants in the Australian hospitality industry

This article analyses the function of temporary sponsored skilled migrants in Australian hospitality, an industry with acute difficulties attracting and retaining skilled workers. Drawing upon survey data, the findings indicate that rather than utilising temporary sponsored skilled migration to source hard skills, as assumed within the extant literature, employers’ recruitment practices are motivated by a desire to source soft skills and labour perceived as relatively controllable, productive and reliable. In explaining these findings, the article develops new insights regarding the dependence of temporary sponsored skilled migrants on their employer sponsors and the industry effects of hospitality. These factors make these workers a relatively more attractive source of labour and shape the nature of employer demand

Analyzing Challenges to Library Materials: An Incomplete Picture

Ope

Labours of division : Legitimacy, membership and the performance of business knowledge

The idea(l) of ‘legitimate peripheral participation’ remains at the heart of debates over the nature and potential of communities of practice. Yet the question of how the legitimacy or otherwise of participation is actually established is seldom addressed. In this article, we focus on ‘legitimacy’ as figure instead of ground. We attend to the ‘displays of competence’, and their associated ‘labours of division’, by means of which ‘practitioners’ claim recognition and are made recognisable to each other as members, or non-members, of an ‘us’. We seek to understand how members come to recognise particular ‘doings’ and forms of knowledge as belonging (or not belonging) to a particular practice. How is the common ‘domain’ (communis) of practice settled (or un-settled) in the course of specific performances of membership? Empirically, the article draws upon a 2-year investigation of how community of practice boundaries and participation were negotiated in ‘UltraGlass Plc’, a multinational manufacturing company, and specifically of the failure of ‘community’ to cohere around practices