Now showing items 1-10 of 142
The effect of the f-component of the pseudopotential on selected properties of 5d transition metal systems
Cohesive energies, bulk moduli, and equilibrium lattice constants have been calculated for the 5d transition atoms (Hf, Ta, W, Re, Os, Ir and Pt) in face–centred cubic crystal lattices. We have used the ab initio ...
Computational studies of bond-site percolation.
Percolation theory enters in various areas of research including critical phenomena and phase transitions. Bond-site percolation is a generalization of pure percolation motivated by the fact that bond-site is close to ...
Numerical cavity-resonance modelling of impulse excited Pi 2 pulsations in the magnetosphere.
A magnetohydrodynamic (MHD) cavity-resonance model is developed to study the ultra low frequency (ULF) response in the magnetosphere to an external compressional impulse. It is assumed that the magnitude of the impulse is ...
Sugar crystal size characterization using digital image processing.
The measurement of the crystal size distribution is a key prerequisite in optimising the growth of sugar crystals in crystalisation pans or for quality control of the final product. Traditionally, crystal size measurements ...
Feasibility study of ionospheric tomography using HF radar
This thesis gives an outline of the ionosphere and studies that were conducted to investigate
Investigation of conceptual and language difficulties affecting the understanding of several mechanics concepts among some African teachers and students.
The results of national examination in matric and universities showed that African students were performing very poorly in their studies and examinations in science and in physics in particular. The objective in this ...
Measurement of the temperature dependence of the Buckingham effect (electric-field-gradient-induced birefringence) in gases
The aim of this research project was to assemble an apparatus to measure the electric quadrupole moments of gas molecules using the technique of electricfield- gradient-induced birefringence, or the Buckingham effect. ...
Transverse modes in porro prism resonators
This dissertation consists of two main sections. The first is a review of laser resonators using spherical mirrors, and incorporates a physical optics numerical model of a Fabry-Perot laser resonator without gain. The ...
Equilibrium properties of some high-temperature superconductors.
An important fundamental problem in the understanding of the high-Tc superconducting systems is the determination of their equilibrium magnetization behaviour, in particular their constitutive Brev(H) orMrev(H) behavior. ...
Towards practical quantum cryptography.
The information society that presides today is dependent on the communication industry to facilitate unintelligible data transfers between authenticated parties. Such requirements have, to date, taken advantage of security ...