Time filter

Source Type

Cape Town, South Africa

The University of the Western Cape is a public university located in the Bellville suburb of Cape Town, South Africa. The University of the Western Cape has a history of creative struggle against oppression, discrimination and disadvantage. Among academic institutions it has been in the vanguard of South Africa's historic change, playing a distinctive academic role in helping to build an equitable and dynamic nation. UWC's key concerns with access, equity and quality in higher education arise from extensive practical engagement in helping the historically marginalised participate fully in the life of the nation. The university was established in 1960 by the South African government as a university for Coloured people only. Other universities near Cape Town are the University of Cape Town, and the Stellenbosch University . The establishing of UWC was a direct effect of the Extension of University Education Act, 1959. This law accomplished the segregation of higher education in South Africa. Coloured students were only allowed at a few non-white universities. In this period, other 'ethnical' universities, such as the University of Zululand and the University of the North, were founded as well. Since well before the end of apartheid in South Africa in 1994, it has been an integrated and multiracial institution. Wikipedia.

Koen C.,University of the Western Cape
Monthly Notices of the Royal Astronomical Society | Year: 2014

1SWASP J234401.81-212229.1 may be one of a handful of contact binaries comprising two Mdwarfs. Modelling of the available observations is complicated by the fact that the radiation of the eclipsing system is dominated by a third star, a K dwarf. New photometry, presented in this paper, strengthens this interpretation of the data. The existence of such systems will have implications for the statistical distributions of masses in hierarchical multiple star systems. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Source

Maritz G.S.,University of the Western Cape
Paediatric Respiratory Reviews | Year: 2013

Many diseases are due to gene-environment or epigenetic-environment interactions resulting in a change in the program that controls tissue structure and function. Changes in the in utero and external environment during perinatal development due to parental smoking, or nicotine exposure, may reduce the capacity of the offspring to protect themselves against environmental stressors. Nicotine is genotoxic and also induces reactive oxygen species [ROS] production. It also reduces the antioxidant capacity of the lung. The lungs of the offspring are therefore developing in an environment of an oxidant-antioxidant imbalance with the concomitant adverse effects of the oxidants and nicotine on cell integrity. Consequently, they are more prone to develop respiratory diseases such as asthma and emphysema later in life. The use of NRT by pregnant or lactating females is therefore not an appropriate strategy to quit smoking. © 2012 Elsevier Ltd. Source

Koen C.,University of the Western Cape
Monthly Notices of the Royal Astronomical Society | Year: 2013

In this paper, a summary of optical time-series photometry of 125 ultracool dwarfs is given. The observing strategy was to monitor each object continuously for 2-3 h in order to ascertain whether itwas rapidly variable. Many of the targetswere observed atmultiple epochs, to follow up possible short time-scale variability, or to test for slow brightness changes on longer timescales. The 353 data sets obtained contain nearly 22 000 individual measurements. Optical (IC) magnitudes, accurate to roughly 0.1-0.2 mag, were derived for 21 objects for which there is no optical photometry in the literature. It is shown that photometry is affected by variable seeing in a large percentage of the time-series observations. Since this could give the appearance of variability intrinsic to the objects, magnitudes are modelled as functions of both time and seeing. Several ultracool dwarfs which had not been monitored before are variable, according to certain model-fitting criteria. A number of objects with multi-epoch observations appear to be variable on longer time-scales. Since testing for variability is far from being straightforward, the time-series data are made available so that interested readers can perform their own analyses. © 2012 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. Source

Cousins B.,University of the Western Cape
Journal of Agrarian Change | Year: 2013

A key issue in debates on agrarian reform in South Africa is the potential for small-scale farming, in conjunction with redistributive land reform, to make a significant contribution to employment creation and poverty reduction. Two problems hinder these debates - the paucity of reliable data on small-scale agriculture, and lack of clarity on the meaning of terms such as 'smallholder' and 'small-scale farmer'. This paper applies class-analytic perspectives on social differentiation to critically examine these terms, and explores the prospects for 'accumulation from above and from below' through agrarian reform, drawing on wider debates within the Southern African region. It focuses in particular on smallholder irrigation schemes, potentially a key focus of policy, and presents research findings on production and marketing of fresh produce in one such scheme in Tugela Ferry, KwaZulu-Natal. Survey data show that farming households combine agriculture and various forms of off-farm labour, as is often the case throughout the region, and that accumulation in small-scale agriculture is constrained by a number of factors, including the inherited and largely untransformed agrarian class structure of South Africa. In this context, expanded access to land and water is a necessary but not sufficient condition for such accumulation; wider structural change is also required. © 2012 Blackwell Publishing Ltd. Source

Henkel R.,University of the Western Cape
Asian Journal of Andrology | Year: 2012

For assisted reproduction technologies (ART), numerous techniques were developed to isolate spermatozoa capable of fertilizing oocytes. While early methodologies only focused on isolating viable, motile spermatozoa, with progress of ART, particularly intracytoplasmic sperm injection (ICSI), it became clear that these parameters are insufficient for the identification of the most suitable spermatozoon for fertilization. Conventional sperm preparation techniques, namely, swim-up, density gradient centrifugation and glass wool filtration, are not efficient enough to produce sperm populations free of DNA damage, because these techniques are not physiological and not modeled on the stringent sperm selection processes taking place in the female genital tract. These processes only allow one male germ cell out of tens of millions to fuse with the oocyte. Sites of sperm selection in the female genital tract are the cervix, uterus, uterotubal junction, oviduct, cumulus oophorus and the zona pellucida. Newer strategies of sperm preparation are founded on: (i) morphological assessment by means of motile sperm organelle morphological examination (MSOME); (ii) electrical charge; and (iii) molecular binding characteristics of the sperm cell. Whereas separation methods based on electrical charge take advantage of the sperm's adherence to a test tube surface or separate in an electrophoresis, molecular binding techniques use Annexin V or hyaluronic acid (HA) as substrates. Techniques in this category are magnet-activated cell sorting, Annexin V-activated glass wool filtration, flow cytometry and picked spermatozoa for ICSI (PICSI) from HA-coated dishes and HA-containing media. Future developments may include Raman microspectrometry, confocal light absorption and scattering spectroscopic microscopy and polarization microscopy. © 2012 AJA, SIMM & SJTU. All rights reserved. Source

Discover hidden collaborations