Faculty of Science e-Theses Collection: Recent submissions
Now showing items 181-200 of 257
-
Effects of different ventilation strategies on the microclimate and transpiration of a rose crop in a greenhouse
(2012-09-07)In this study, the water vapour balance method was used to evaluate the ventilation rate to calibrate and validate the ventilation sub-model of the Gembloux Dynamic Greenhouse Climate Model (GDGCM) in a naturally ventilated ... -
Maize Yield Forcasting in Malawi Using Satellite Data and a Soil Water Balance Modelling Aproach.
(2012-09-07)The potential of using Normalized Difference Vegetation Index (NDVI) and the AgroMetShell (AMS) to forecast and estimate maize yield at Rural Development Project (RDP) level in Malawi was investigated. NDVI is derived from ... -
PREVALENCE OF INTESTINAL PROTOZOAN PARASITES IN DIVERSE COMMUNITIES AND DRINKING WATER BODIES IN ZIMBABWE AND WATER DISINFECTION METHODS AGAINST Giardia duodenalis AND Entamoeba histolytica/dispar.
(2012-09-03)A prevalence study of parasitic infections in 1 260 school pupils living in urban, rural tribal trust land and commercial farming environments of Zimbabwe was done. Stool specimens were collected on 3 alternative days and ... -
Modelling the effects of treatment on chronically infected HIV-positive patiants.
(2012-09-03)The devastating impact of HIV as a chronic infectious agent on humankind has forced a consideration of the rationale of administering combined drug therapies that incorporate fusion inhibitors, reverse transcriptase ... -
Low-frequency asymmetric vibrations of a tn shell with sign-changing curvature.
(2012-09-03)Most problems in Applied Mathematics involving difficulties such as nonlinear governing equations and boundary conditions, variable coefficients and complex boundary shapes preclude exact solutions. Consequently exact ... -
Travelling wave solutions of a mathematical model for tumor encapsulation.
(2012-09-03)The formation of a capsule of dense, fibrous extracellular matrix around a solid tumour is a key prognostic indicator in a wide variety of cancers. However, the cellular mechanisms underlying capsule formation remain ... -
Asymptomatic Solution Of The Thin Shell Equations Containing A Turning Point
(2012-09-03)The subject matter of this report is the vibrating behavior of thin shells of revolution when the generating line has a point of inflection at s*. At this point s*, the curvature changes its sign. We develop from the ... -
Minimal Variance Hedging In A Discrete Time Market Driven By Markov Process
(2012-09-03)Techniques in stochastic analysis are presented in a continuous time framework.We then review methods in quadratic hedging approaches with focus on minimal variance hedging in a discrete time framework. We also consider ... -
Some apsects of products of totally permutable groups.
(2012-09-03)In this work groups factorised as products of pairwise totally permutable subgroups are investigated in the framework of SC-groups, P ST -groups, PT -groups and T -groups. In particular an attempt is made to answer the ... -
Mathematical Modelling Of Passive Cooling In Buildings
(2012-09-03)This thesis presents mathematical models for thermal energy storage in low energy buildings. Two different cooling systems are considered. One uses a ventilated slab, the other a packed bed. The ventilated slab design is ... -
Phenomenological Study of Backward Bifurcation in Epidemiological Models.
(2012-09-03)This thesis is about the phenomenological study of bifurcations in epidemiologicalmodels, in particular, in backward bifurcation. We consider models that exhibit such bifurcation and also consider the factors that cause ... -
A Mathematical Model Of Combined Pre-Exposure, Post-Exposure Vaccines And Treatment Of Tuberculosis
(2012-09-03)Due to high prevalence of tuberculosis (TB) in developing countries where HIV prevalence is also high, developing effective TB vaccines that will prevent infection and reactivation of latent infection is a high priority. ... -
Effects Of Vaccination And Treatment On HIV Transmission
(2012-08-31)This paper is an investigation of the possible effects of vaccination and treatment on the dynamics of HIV-AIDS in a varying population. The devastating global impact of HIV has increased research efforts to find an effective ... -
Evaluating the potential impact of condoms and vaginal microbicides to reduce the spread of HIV.
(2012-08-31)Since its emergence in the 1980s,the HumanImmuno-deficiency Virus(HIV),the causative agent of Acquired Immune Deficiency Syndrome (AIDS) has claimed the lives of millions of people(20 million), and continues to exert ... -
Single Period Inventory Models for Products whose Demand Follows Compound Distributions
(2012-08-31)Up to this point, the Single Period Inventory models developed have focused on a product whose demand distribution in a single period is some simple classical distribution like the normal distribution, log-normal distribution, ... -
On a Stochastic Control Problem with Terminal State Constraints
(2012-08-31)In this thesis, we consider a stochastic control problem in both finite and infinite time interval, with a terminal state constraint. We consider two approaches in solving the problem i.e., the Maximum Principle and the ... -
Treatment of HIV-1 with Reverse Transcriptase Inhibitors ( RTI's) and Protease Inhibitors ( PI's )
(2012-08-31)Treatment with antiretroviral drugs has been reported to delay progression of HIV infection to AIDS, and may even lower the infectiousness of the infectives. This study investigates the effects of treatment of HIV-1 with ... -
A Study of Heap Fermentation and Protein Enrichment of Cassava.
(2012-08-30)Cassava (Manihot esculenta Crantz) is an important source of carbohydrate for humans and animals, producing high energy of 610 kJ/100 g fresh root weight. However, it is very poor in protein (1 % fresh root weight) and ... -
Metal, Arsenic and Cyanide Pollution of the Environment in the Vicinity of a Mining Waste Disposal Dump at Athens Mine.
(2012-08-30)Mining activity and mine wastes at Athens mine; Mvuma, Zimbabwe, have been generated since the 15th century accelerated significantly during the 20th century. The mine wastes constitute a potential source of contamination ... -
The Limnology and Ecology of Two Small Man-Made Reservoirs in Zimbabwe.
(2012-08-30)This study investigated the limnology of two small dams (< 5ha) built in series on Munwahuku river. Very little is known about the ecology of such small water bodies and the hydrological regime of these dams is that they ...
