On the Estimation of Parameters of Kumaraswamy-G Distributions

Cordeiro and de Castro proposed a new family of generalized distributions based on the Kumaraswamy distribution (denoted as Kw-G). Nadarajah et al. showed that the density function of the new family of distributions can be expressed as a linear combination of the density of exponentiated family of distributions. They derived some properties of Kw-G distributions and discussed estimation of parameters using the maximum likelihood (ML) method. Cheng and Amin and Ranneby introduced a new method of estimating parameters based on Kullback–Leibler divergence (the maximum spacing (MSP) method). In this article, the estimates of parameters of Kw-G distributions are obtained using the MSP method. For some special Kw-G distributions, the new estimators are compared with ML estimators. It is shown by simulations and a real data application that MSP estimators have better properties than ML estimators.     

Therapeutic Hypothermia: Quantification of the Transition of Core Body Temperature Using the Flexible Mixture Bent‐Cable Model for Longitudinal Data

Hypothermia which is induced by reducing core body temperature is a therapeutic tool used to prevent brain damage resulting from physical trauma. However, all physiological systems begin to slow down due to hypothermia and this can result in increased risk of mortality. Therefore quantification of the transition of core body temperature to early hypothermia is of great clinical interest. Conceptually core body temperature may exhibit an either gradual or abrupt transition. Bent‐cable regression is an appealing statistical tool to model such data due to the model's flexibility and readily interpretable regression coefficients. It handles more flexibly models that traditionally have been handled by low‐order polynomial models (for gradual transition) or piecewise linear changepoint models (for abrupt change). We consider a rat model to quantify the temporal trend of core body temperature primarily to address the question: What is the critical time point associated with a breakdown in the compensatory mechanisms following the start of hypothermia therapy? To this end, we develop a Bayesian modelling framework for bent‐cable regression of longitudinal data to simultaneously account for gradual and abrupt transitions. Our analysis reveals that: (i) about 39% of rats exhibit a gradual transition in core body temperature; (ii) the critical time point is approximately the same regardless of transition type; and (iii) both transition types show a significant increase of core body temperature followed by a significant decrease.     

The roots of black resistance: race,gender and the struggle for urban land rights in Salvador,Bahia, Brazil

In Salvador, Bahia, Brazil, during the past ten years, the city has transformed its historical centre into cultural sites for leisure tourism. This process has included projects of ‘slum clearance’, negatively impacting black communities who have historically occupied these areas. In this essay, I present an ethnographic account of Gamboa de Baixo, a black coastal community in the centre of Salvador, and its political movement against urban renewal programmes. Specifically, I focus on the articulation of racial and gender politics in black women's grassroots activism against land expulsion and for access to material resources. This case in Salvador unearths one aspect of institutional racism in Brazil and the formation of an anti‐black racism resistance movement. Resistance to urban renewal plans in Salvador demonstrates how struggles for urban land rights are a crucial part of engaging in the broader national and international politics of race. In black communities in Brazil and throughout the African diaspora, urban land and territorial rights are the local idioms of black resistance.     

Two new confidence intervals for the coefficient of variation in a normal distribution

In this article we introduce an approximately unbiased estimator for the population coefficient of variation, τ, in a normal distribution. The accuracy of this estimator is examined by several criteria. Using this estimator and its variance, two approximate confidence intervals for τ are introduced. The performance of the new confidence intervals is compared to those obtained by current methods.     

Variance components estimation for the balanced random effects model under mixed prior distributions

For the balanced random effects models, when the variance components are correlated either naturally or through common prior structures, by assuming a mixed prior distribution for the variance components, we propose some new Bayesian estimators. To contrast and compare the new estimators with the minimum variance unbiased (MVUE) and restricted maximum likelihood estimators (RMLE), some simulation studies are also carried out. It turns out that the proposed estimators have smaller mean squared errors than the MVUE and RMLE.     

Public Sociology: Working at the Interstices

The article examines recent debates surrounding public sociology in the context of a UK based Department of Applied Social Sciences. Three areas of work within the department form the focus of the article: violence against women and children; community-based oral history projects and health ethics teaching. The article draws on Micheal Burawoy’s typology comprising public, policy, professional and critical sociology, and argues that much of the work described in the case studies more often lies somewhere in between, in the interstices, rather than within one or other of the four types. The result is not without its tensions and dilemmas, some of which are identified and explored, notably those arising from attempts to appeal to diverse audiences and meet the sometimes conflicting expectations of each.     

Old and New Forms of Giving: Understanding Corporate Philanthropy in India

Corporate philanthropy in India is burgeoning due to a fast growing economy, rise in the number of billionaires, and the recent introduction of legislation that mandates spending 2 % of company profits on corporate social responsibility. Through analysis of key historical and anthropological texts, we argue that ‘business philanthropy has a long and honorable history in India’ (Sidel, Voluntas: International Journal of Voluntary and Nonprofit Organizations 12(2):171–180, 172, 2001), and explain this with reference to Indian giving practices from Hindu, Mughal (Muslim), British Raj, and Gandhian traditions. We then move into a review of the emerging field of literature on corporate philanthropy, to explore how these traditions synthesized with contemporary global business and economic practices to create a distinct form of Indian corporate philanthropy. We necessarily also include an overview of its salient critiques. This will be of interest to those concerned with Indian philanthropy and of culturally specific scholarship of philanthropy.     

Media Action Research Group: toward an antiauthoritarian profeminist media research methodology

The Media Action Research Group (MARG) is an antiauthoritarian, profeminist (antiracist, anticolonial, queer, trans and anti-capitalist) group of activist-researchers both inside and outside the university, studying autonomous social movement media activism in Canada and beyond. In this article we map a taxonomy of activist-research, illustrating how MARG brings together five specific methodologies—activist-led issue-based research, militant participatory ethnography, feminist community research, prefigurative antiauthoritarian feminist participatory action research (PAFPAR), and autonomous media research—to study how women, people of colour, queer and trans people, and Indigenous people in antiauthoritarian or anarchist-leaning social movements are using grassroots media to support and report on these movements. We find that although MARG set out to create an antiauthoritarian research-activist collective, we are restricted in some ways by the intensification of neoliberalism in the university institution. Nonetheless we are able to conduct transgressive research at the intersection between antiauthoritarian activism and the academy, producing three direct and immediate impacts: within social movements, within media activism, and within the university.