University of South Africa

About: University of South Africa is a education organization based out in Pretoria, South Africa. It is known for research contribution in the topics: Context (language use) & Population. The organization has 8478 authors who have published 19960 publications receiving 237688 citations. The organization is also known as: Unisa.

Why Young Men Drive Dangerously: Implications for Injury Prevention:

Abstract: Why is risk consistently underestimated, and why do young men in particular take exceptionally high risks and think of themselves as invulnerable? Two explanatory paths are proposed. The first is that risk taking in young males has been shaped by evolutionary forces to provide a fitness value. The second pathway is through myth and the other narrative forms that affirm the ego's immortality and invulnerability. Because of its evolutionary base, risk taking is emotionally driven: Emotions are preverbal and irrational, which means that persuasive prevention cannot be more than weakly successful. Three prevention challenges emerge from this analysis: to determine what it is that young drivers fear, to attach affectively experienced fears to defined driving behaviors, and to devise injury-prevention programs that acknowledge that young males’ risk taking is not “stupid,” but driven by adaptive needs that are as significant to today's young adults as they were to our distant ancestors.

The Psychological Society of South Africa sexual and gender diversity position statement: contributing towards a just society

Abstract: In this article, we outline the position statement on sexual and gender diversity adopted by the Psychological Society of South Africa’s Council on 24 September 2013. In line with the Society’s con...

Influence of PVA, PVP and PEG doping on the optical, structural, morphological and magnetic properties of zinc ferrite nanoparticles produced by thermal method

Abstract: This work demonstrated an in-depth investigation of the effect of surface doping by three different polymers on the synthesis of zinc ferrite nanostructures by a thermal method. The zinc ferrites were doped with 20% concentration by mass of Polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP) and Polyethylene glycol (PEG) to enhance its properties. The X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) confirmed the incorporation of the polymers in the lattice with an obvious increase in the crystallite size, functional groups, spherical morphology, and superparamagnetic behavior respectively. It is noteworthy that the cubic crystalline structure, favorable particle size and magnetic properties of the doped samples gave the NPs a controllable and improved properties for sundry applications in the medical fields such as Hyperthermia and drug delivery with PEG dopant showing a towering leverage on the properties of the ZF with 11% polydispersity Index (PDI).

Government Expenditure and Economic Growth in South Africa: an Empirical Investigation

Abstract: In this study, the dynamic causal relationship between government expenditure and economic growth is examined using data from South Africa, the most advanced economy in Africa. The study uses the recently developed auto-regressive distributed lag model (ARDL)-bounds testing approach to examine this linkage. In order to address the omission of variable bias, the study incorporates unemployment as an intermittent variable between economic growth and government spending, thereby creating a simple multivariate model. The empirical findings of this study show that, although both government expenditure and economic growth Granger-cause each other in the short run, in the long run, it is economic growth that Granger-causes government expenditure.

A functional semantic web architecture

Abstract: A layered architecture for the Semantic Web that adheres to software engineering principles and the fundamental aspects of layered architectures will assist in the development of Semantic Web specifications and applications. The most well-known versions of the layered architecture that exist within literature have been proposed by Berners-Lee. It is possible to indicate inconsistencies and discrepancies in the different versions of the architecture, leading to confusion, as well as conflicting proposals and adoptions by the Semantic Web community. A more recent version of a Semantic Web layered architecture, namely the CFL architecture, was proposed in 2007 by Gerber, van der Merwe and Barnard [23], which adheres to software engineering principles and addresses several of the concerns evident from previous versions of the architecture. In this paper we evaluate this recent architecture, both by scrutinising the shortcomings of previous architectures and evaluating the approach used for the development of the latest architecture. Furthermore, the architecture is applied to usage scenarios to evaluate the usefulness thereof.