A nurse-based algorithm for earlier diagnosis of smear-negative pulmonary tuberculosis in HIV-infected adults in Lesotho

Cape Town TB Conferenc

X-rays and Gamma-rays from Cataclysmic Variables: The example case of Intermediate Polar V1223 Sgr

The accretion of matter onto intermediate polar White Dwarfs (IPWDs) seems to provide attractive conditions for acceleration of particles to high energies in a strongly magnetized turbulent region at the accretion disk inner radius. We consider possible acceleration of electrons and hadrons in such region and investigate their high energy radiation processes. It is concluded that accelerated electrons loose energy mainly on synchrotron process producing non-thermal X-ray emission. On the other hand, accelerated hadrons are convected onto the WD surface and interact with dense matter. As a result, high energy $\gamma$-rays from decay of neutral pions and secondary leptons from decay of charged pions appear. We show that GeV-TeV $\gamma$-rays can escape from the vicinity of the WD. Secondary leptons produce synchrotron radiation in the hard X-rays and soft $\gamma$-rays. As an example, we predict the X-ray and $\gamma$-ray emission from IPWD V1223 Sgr. Depending on the spectral index of injected particles, this high energy emission may be detected by the ${\it Fermi}$-LAT telescope and/or the future Cherenkov Telescope Array (CTA) observatory.Comment: 16 pages, 1 figure, accepted to MNRA

The Women's naked protest, Dobsonville 1990: gender consciousness and the body politic

Paper presented at the Wits History Workshop: Democracy, Popular Precedents, Practice and Culture, 13-15 July, 1994

Poverty, possessions and proper living : constructing and contesting propriety in Soweto and Lusaka City

Bibliography: 131-137.Recent material culture theory points out how material possessions are woven into the fabric of lives, shaping social relations and texturing people's meanings and interpretation of their world. This study embarks on exploring aspects of this objected fabric, in the context of urban working black South Africans, living in three different township suburbs in Gauteng, in four differing housing circumstances, in the mid-1990s and in the midst of much uncertainty of what the future might hold for poor urban residents. Drawing on participant observation, ethnographic interviews, and household and appliance ownership surveys, the study explores the ways in which domestic objects- appliances specifically - function symbolically for a set of people living in Soweto formal houses, backyard shacks, an informal settlement and in Lusaka City site-and -service settlement on the West Rand, in Gauteng, South Africa. I examine symbolic constructions and creations in these people's homes, gleaning some of the meaning people attributed to particular modes of equipping their homes, and how aspects of their image of themselves and each other were presented, acted out, created, 'conversationed', contested and negotiated through material goods

The use of first-person pronouns in argumentative writing of Afrikaans- speaking first-year students: A corpus-based investigation

The writing of academic texts in which the voice of the author figures more prominently is actively gaining support among academics. There is an increasing shift towards a more personal style of academic writing where authors, through the use of personal pronouns, are explicitly present in their texts. However, it seems as if many first-year students not only use the first-person pronoun excessively, but also find it difficult to apply the practice appropriately in their argumentative texts. This article focuses on the use of the first-person pronouns ek [I], my [me] and myns insiens [in my opinion] in the writing of Afrikaans-speaking students. A corpus-based investigation was conducted into the frequency and distribution of use throughout the three parts of an argument (introduction, content and conclusion), as well as the functional and objective application of these pronouns in an authentic learner corpus. The analysis gave insight into the use of first-person pronouns as well as potential problems pertaining thereto. In light of the findings in the particular corpus, it is recommended that Afrikaans-speaking first-year students’ skills in the use of first-person pronouns, should be further developed at university.Keywords: academic argument; academic writing; coherence; conventions; first-person pronouns; metadiscours