Vista University

About: Vista University is a based out in . It is known for research contribution in the topics: Boron trifluoride & Higher education. The organization has 225 authors who have published 336 publications receiving 3345 citations.

A PIXE study of abnormal X-rays from binary fluorides with protons in the range 0.4–2 MeV

Abstract: Previously reported abnormally high X-ray yields from the fluorides of some transition metals were confirmed. Using proton beams and beams of the molecule-ion 1H2+, at equivalent proton energies between 400 and 2000 keV the conditions for the production of abnormally high X-ray yields were studied for the effect of ion beam energy, beam current, charge, target thickness and atomic number of the target metal. The effect was probably due to buildup of potential and discharge with the production of a flux of energetic electrons, with an energy distribution peaking above 10 keV.

The recognition of access to health care as a human right in South Africa: is it enough?

Abstract: A right of access to health care services is among the economic and social rights guaranteed by the Constitution of South Africa. Given the jurisprudential novelty of such a right and its dependence on economic resources, however, its realization is likely to be difficult to secure. The article discusses the scope and limitations of the right of access to health care in South Africa. Though the country's courts have yet to develop clear principles for interpreting a right of access to health care services, the more significant obstacles to the full enjoyment of this right are the country's pervasive poverty, gross income disparities, and extremely high burden of disease.

Coherence lengths for three-dimensional superconductors in the BCS-Bose picture.

Abstract: Following an approach similar to that of Miyake or Randeria, Duan, and Shieh in two dimensions, we study a three-dimensional many-fermion gas at zero temperature interacting via some short-ranged two-body potential. To accommodate a possible singularity (e.g., the Coulomb repulsion) in the interaction, the potential is eliminated in favor of the two-body scattering {ital t}-matrix, the low-energy form of which is expressible in terms of the {ital s}-wave scattering length {ital a}{sub {ital s}}. The BCS gap equation for {ital s}-wave pairing is then solved simultaneously with the number equation in order to self-consistently obtain the zero-temperature BCS gap {Delta} as well as the chemical potential {mu} as functions of the dimensionless coupling variable {lambda}{equivalent_to}{ital k}{sub {ital F}}{ital a}{sub {ital s}}, where {ital k}{sub {ital F}} is the Fermi momentum. Results are valid for arbitrary coupling strength, and in the weak coupling limit reproduce the standard BCS results. Finally, root-mean-square pair sizes are obtained as a function of {lambda} and compared with experimental values.

An exploratory study on the perceptions of previously educationally disadvantaged first year learners of law regarding university education

Abstract: This article presents an exploratory study and focuses on the high failure rate amongst first year learners at South African universities. A trend that is significantly higher at HBU's (historically black universities). A cause for this problem can probably be found in the inadequate school education of these learners. Some of the findings of the study are that learner preparation had a non-significant influence whilst presentation of lectures had a significant influence on the perceptions regarding university studies. For the success of outcomes-based education and the successful shifting of focus from teaching to learning, a culture of learning needs to be cultivated. Lecturers should make learners aware that they must adopt a different approach to learning at university level. Learners have a greater responsibility to work on their own. South African Journal of Higher Education Vol.16(2) 2002: 177-182