Now showing items 1-10 of 366
Clifford-Fischer theory applied to certain groups associated with symplectic, unitary and Thompson groups.
The character table of a finite group is a very powerful tool to study the groups and to prove many results. Any finite group is either simple or has a normal subgroup and hence will be of extension type. The classification ...
Spatial modelling of fire dynamics in Savanna ecosystems.
Fire is used in the management of ecosystems worldwide because it is a relatively inexpensive means of manipulating thousands of hectares of vegetation. Deciding how, where and when to apply fire depends primarily on the ...
Analysis of mixed convection in an air filled square cavity.
A steady state two-dimensional mixed convection problem in an air filled square unit cavity has been numerically investigated. Two different cases of heating are investigated and compared. In the first case, the bottom ...
The application of multistate Markov models to HIV disease progression.
Survival analysis is a well developed area which explores time to single event analysis. In some cases, however, such methods may not adequately capture the disease process as the disease progression may involve ...
Artificial neural networks for image recognition : a study of feature extraction methods and an implementation for handwritten character recognition.
The use of computers for digital image recognition has become quite widespread. Applications include face recognition, handwriting interpretation and fmgerprint analysis. A feature vector whose dimension is much lower ...
On the theory and examples of group extensions.
The work described in this dissertation was largely motivated by the aim of producing a survey on the theory of group extensions. From the broad scope of the theory of group extensions we single out two aspects to discuss, ...
Partial exchangeability and related topics.
Partial exchangeability is the fundamental building block in the subjective approach to the probability of multi-type sequences which replaces the independence concept of the objective theory. The aim of this thesis is ...
Analysis of shear-free spherically symmetric charged relativistic fluids.
We study the evolution of shear-free spherically symmetric charged fluids in general relativity. This requires the analysis of the coupled Einstein-Maxwell system of equations. Within this framework, the master field ...
Exact solutions for perfect fluids conformal to a Petrov type D spacetime.
Abstract is available from the print copy.
Centre manifold theory with an application in population modelling.
There are basically two types of variables in population modelling, global and local variables. The former describes the behavior of the entire population while the latter describes the behavior of individuals within this ...