Work in progress: Recent submissions

Now showing items 41-60 of 510

Nuclear scattering in the random phase approximation

Lemmer R.H.; Veneroni M. (1968)

A simple extension of the random phase approximation (RPA) is described that includes scattering channels of a single nucleon. Coupled equations are derived for the single-nucleon amplitudes that describe the scattering ...
Use of a truncated Hilbert space in nuclear reaction calculations

Hufner J.; Lemmer R.H. (1968)

This formulation of nuclear reaction calculations stays as close as possible to the usual bound-state shell-model calculations. The Hilbert space used in the bound-state calculations is enlarged by adding the scattering ...
A school-based socio-emotional programme as strategy against crime and violence ['n Skoolgebaseerde sosiaal-emosionele program as strategie teen misdaad en geweld]

Van Der Merwe P. (2011)

The point of departure of this article is that crime and violence is a serious problem in South African schools. School violence can be understood as any behaviour that violates a school's educational mission or climate ...
Comparative education - Perspectives in a changing South Africa

Pretorius F. (Kluwer Academic Publishers, 1992)

[No abstract available]
Effect of tempering temperature and time on the corrosion behaviour of 304 and 316 austenitic stainless steels in oxalic acid

Afolabi, A.S.; Potgieter, J.H.; Abdulkareem, A.S.; Fungura, N. (2011)

The effect of different tempering temperatures and heat treatment times on the corrosion resistance of austenitic stainless steels in oxalic acid was studied in this work using conventional weight loss and electrochemical ...
Urban early adolescents, crowding and the neighbourhood experience: A preliminary investigation

Van Staden F.J. (1984)

This interview study focused on urban early adolescents' conscious experiences of high density conditions. Thirty children residing in apartments in two boroughs of New York City (Brooklyn and Manhattan), participated in ...
Retarded interactions in fermi systems. II. Quasiparticle lifetimes

Dover C.B.; Lemmer R.H. (1969)

Properties of the inverse lifetime 1 of quasiparticles in an infinite system of nucleons ("nuclear matter") interacting via the exchange of a neutral scalar boson are studied in the dielectric formulation of the many-body ...
Proton-induced break-up of 3He at 35MeV

Slaus I.; Epstein M.B.; Mdlalose T.E.; Fiedeldey H.; Sandhas W. (1990)

The reactions 3He + p → d + p + p, and 3He + p → p + p + p + n have been studied at 35MeV. These reactions are dominated by quasi-two-body processes: pp and pd quasi-free scattering, pp final-state interactions, and neutron ...
Deuteron on deuteron break-up in regions characterized by competing mechanisms

Mdlalose T.E.; Fiedeldey H.; Sandhas W. (1988)

Previous calculations of the reaction 2H(d, nd)1H, performed in the quasi-free scattering (QFS) region by means of the four-body AGS formalism, are extended to kinematical situations, where final state interaction (FSI) ...
The prediction of the performance of simple catalytic reactors for Fischer-Tropsch type catalytic polymerization reactions

Green J.C.A.; Jager B. (1985)

Kinetic equations based on the Schultz-Flory theory and simple power law kinetics for the product distributions are used in a special class of catalytic polymerization reactions of which Fischer-Tropsch reactions form a ...
The detection of a change point in periodic gamma ray data

Lombard F.; de Jager O.C.; Schultz D.M. (1990)

We present a method which can identify the start- and end times of a periodic burst of gamma rays. The assumption is that the periodic light curve has power in the fundamental harmonic and that the noise (i.e. cosmic ray) ...
An improved molecular orbital localization scheme

Verwoerd W.S.; Nolting V. (1991)

A fully symmetrical orthogonalization algorithm is described and applied to the localized orbitals (LMOs) generated by the previously published POPLOC localization program. The results are compared with those of the ψ ...
The Manifestation of Religious Commitment with Regard to Divergent Reality Definitions

Coetzee J.K. (1978)

[No abstract available]
Adaptive local polynomial periodogram for time-varying frequency estimation

Katkovnik Vladimir (IEEE, Piscataway, NJ, United States, 1996)

The local polynomial periodogram enables one to obtain nonparametric estimates of the instantaneous frequency (IF) and its derivatives. The optimal choice of the window size based on asymptotic formulas for the variance ...
Research utilization.

Mhlongo T.P.; Brink H. (1996)

The gap that persists between research and practice has been highlighted by nurse practitioners. In South Africa the research-practice gap is maximized by the lack of research facilities and research utilization projects ...
Local polynomial periodograms for signals with the time-varying frequency and amplitude

Katkovnik Vladimir (IEEE, Piscataway, NJ, United States, 1996)

The estimation of the time-varying IF Ω(t) and amplitude A(t) of harmonic signal is considered. The non-parametric local polynomial approximation (LPA) is used in order to develop two new estimators, which enable one to ...
CAL for first year analytical chemistry by distance education

Steyn M.M.D.V.; Alexander P.M.; Rohm D. (1996)

A series of computer-aided learning (CAL) lessons for first year analytical chemistry was developed by the University of South Africa (UNISA) and made available to students as an optional learning activity. Evaluation of ...
A peoplecentred perspective on peoplecentred community development

Schenck C.I.; Louw H. (1995)

This article uses the concept of "peoplecentredness' for South Africa to stress the fact that development requires that the people themselves - who are meant to be the beneficiaries of development initiatives - be placed ...
Between the shark tank and the deep blue sea: Incidents from a history of the Durban Aquarium

Blanche M.T.; Hamber B. (1996)

We trace the history of the Durban Aquarium from its founding to the present. With reference to individuals such as Kelple the dolphin (Stenella euphrosyne), Sally the sawfish (Pristis pectinatus), ORI II the penguin ...
Training for Community Development. Some Guidelines from the Literature, Some Lessons from Experience

De Beer F. (1995)

[No abstract available]

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