Browsing School of Science by Issue Date

Now showing items 21-40 of 308

Statistical modelling by neural networks

Fletcher, Lizelle (2002-06)

In this thesis the two disciplines of Statistics and Artificial Neural Networks are combined into an integrated study of a data set of a weather modification Experiment. An extensive literature study on artificial neural ...
Products of diagonalizable matrices

Khoury, Maroun Clive (2002-09)

Chapter 1 reviews better-known factorization theorems of a square matrix. For example, a square matrix over a field can be expressed as a product of two symmetric matrices; thus square matrices over real numbers can be ...
Measurable functions and Lebesgue integration

Brooks, Hannalie Helena (2002-11)

In this thesis we shall examine the role of measurerability in the theory of Lebesgue Integration. This shall be done in the context of the real line where we define the notion of an integral of a bounded real-valued ...
The evaluation of the Augmented Programme for ND Analytical Chemistry at the ML Sultan Technikon for the period 1994-1999

Timm, Delysia Norelle (2005-01)

Due to the inadequate schooling system and the underpreparedness of learners in South African High Schools, Higher Education Institutions are faced with learners who do not meet the minimum criteria for acceptance into ...
Nuclear reactions inside the water molecule

Dicks, Jesse (2005-06)

A scheme, analogous to the linear combination of atomic orbitals (LCAO), is used to calculate rates of reactions for the fusion of nuclei con¯ned in molecules. As an example, the possibility of nuclear fusion in rotationally ...
The effects of hydrating agents on the hydration of industrial magnesium oxide

Matabola, Kgabo Phillemon (2006-11-30)

Magnesium hydroxide, a stable flame retardant, can be obtained by mining or by the hydration of magnesium oxide. In this study, the effect of different hydrating agents on the pH of the hydrating solution, rate of hydration ...
The role of three-body forces in few-body systems

Masita, Dithlase Frans (2006-11-30)

Bound state systems consisting of three nonrelativistic particles are numerically studied. Calculations are performed employing two-body and three-body forces as input in the Hamiltonian in order to study the role or ...
The development of FT-Raman techniques to quantify the hydrolysis of Cobalt (III) nitrophenylphosphate complexes using multivariate data analysis

Tshabalala, Oupa Samuel (2007-03)

The FT-Raman techniques were developed to quantify reactions that follow on mixing aqueous solutions of bis-(1,3-diaminopropane)diaquacobalt( III) ion ([Co(tn)2(0H)(H20)]2+) and p-nitrophenylphosphate (PNPP). For the ...
Metal ion mediated hydrolysis of 4-nitrophenylphosphate in microemulsion media: catalytic versus stoichiometric effects

Eguzozie, Kennedy Uchenna (2008-05)

The hydrolysis of 4-Nitrophenylphosphate (NPP) as model substrate in the presence of several cobalt (III) amine [N4Co(OH)(H2O)]2+ and copper bipyridyl [Cu(bpy)(H2O)2]2+ complexes in oil in water microemulsion media was ...
A strategic model for planning and implementing an on-line approach for continuous professional development

Van der Merwe, Thomas Mc Donald (2008-06)

The poor performance by South African pupils in The Third International Mathematics and Science Study highlighted the importance of and need for Continuing Professional Development (CPD) for South African mathematics ...
Nitric oxide triggered dephosphorylation reactions

Enemchukwu, Emeka Martin (2009-01)

The synergistic effect of nitric oxide toward dephosphorylation reactions involving phosphate esters was the subject of investigation in this research. Sodium nitroprusside under UV irradiations at 254nm, 365nm and white ...
Hybrid numerical methods for stochastic differential equations

Chinemerem, Ikpe Dennis (2009-02)

In this dissertation we obtain an e cient hybrid numerical method for the solution of stochastic di erential equations (SDEs). Speci cally, our method chooses between two numerical methods (Euler and Milstein) over a ...
Modelling of W UMa-type variable stars

Skelton, P.L.; Smits, D.P (OpenJournals Publishing, 2009-04)

W Ursae Majoris (W UMa)-type variable stars are over-contact eclipsing binary stars. To understand how these systems form and evolve requires observations spanning many years, followed by detailed models of as many of them ...
Numerical solution of multiband k.p model for tunneling in type-II heterostructures.

Botha, A.E. (OpenJournals Publishing, 2009-07)

A new and very general method was developed for calculating the charge and spin-resolved electron tunnelling in type-II heterojunctions. Starting from a multiband k.p description of the bulk energy-band structure, a multiband ...
The impact of interactive-engagement models in the teaching and learning of physics to first year education students

Khwanda, Mphiriseni Norman (2009-07)

The aim of this study was firstly to evaluate the impact of two interactive-engagement models of instruction, namely Whole Class Discussions (WCD) and Computer Simulations (CS) on first year physics student-teachers’ ...
Pyridine and amine functionalized polymers by anionic and controlled free radical polymerization methods

Ndawuni, Mzikayise Patrick (2009-07)

The synthesis of dipyridyl functionalized polysulfones with improved hydrophilicity, enhanced membrane morphology and excellent ATRP polymeric ligand properties was conducted by the following method: (a) the formation of ...
Constructing programs, how children with Attention Deficit Hyperactivity Disorder (ADHD) learn to program

Pilkington, Colin Leon (2009-08)

Many learners find the study of introductory computer programming difficult. This is also true of children with attention deficit hyperactivity disorder (ADHD), and we need an improved understanding of how they learn ...
Biscarbene complexes of Bithiophene

Ramontja, James (2009-08)

Binuclear mixed biscarbene complexes of bithiophene were synthesized via the classical Fischer method of synthesis. The metal carbonyls, Mo(CO)6, Cr(CO)6, W(CO)6 and Mn(MeCp)(CO)3 were reacted with dilithiated bithiophene ...
The fractal geometry of Brownian motion

Potgieter, Paul (2009-08)

After an introduction to Brownian motion, Hausdorff dimension, nonstandard analysis and Loeb measure theory, we explore the notion of a nonstandard formulation of Hausdorff dimension. By considering an adapted form of the ...
Artificial neural network methods in few-body systems

Rampho, Gaotsiwe Joel (2009-08)

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