Faculty of Science: Recent submissions
Now showing items 221-240 of 317
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Determination of water productivity of maize varieties grown in Zimbabwe
(2012-09-12)The quantification of water use in plants is necessary to maximize water use efficiency in semi -arid areas where water is often limiting. The main objective of the study was to quantify maize water productivity and apply ... -
A Mathematical Model Of Combined Pre-Exposure, Post-Exposure Vaccines And Treatment Of Tuberculosis
(2012-09-12)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. ... -
Gas lensing in a heated rotating pipe
(2012-09-07)When a heated pipe is axially rotated, the dynamics of the gas inside exhibit properties reminiscent of a positive lens. These are the result of a parabolic distribution of refractive index in the pipe, which is caused by ... -
Design and consruction of microcontroller-based multi-parameter monitoring system.
(2012-09-07)Many farmers and agricultural research groups need environmental data to augment their agricultural measurements. Such data is needed to understand the physical environment that includes the climate in general, and the ... -
Production and Physiological Responses of Lactating Holstein Dairy Cows to the Provision of Shade in Sub-Tropical Zimbabwe.
(2012-09-07)The objective of this study was to establish production and physiological benefits of shade provision to lactating Holstein cows under hot summer conditions in Zimbabwe. Different shading materials providing shade at ... -
INDUCED POLARISATION TECHNIQUES FOR MINERAL EXPLORATION IN THE KUPA GRID, MADHLAMBUDZI, SOUTH WESTERN ZIMBABWE
(2012-09-07)The geophysical techniques of gravity, magnetics, induced polarisation (IP) and radiometrics were carried out in Madhlambudzi about 120 km west of Bulawayo from May to June, 2006. The area is overlaid by Kalahari sand and ... -
Monitoring the simultaneous response of various water status indicators for use in the irrigation scheduling and drought stress detection of a greenhouse tomato crop.
(2012-09-07)An experiment was conducted in a greenhouse at the Department of Biological Sciences, University of Zimbabwe to test the use of various plant water status indicators for use in the irrigation scheduling and water stress ... -
Response of Navel orange trees to timed partial root zone drying in northern Zimbabwe
(2012-09-07)Navel orange trees (Citrus sinensis (L.)Osbeck) were drip irrigated in an 8 hectare commercial orchard at Mazowe Citrus Estate (Mazowe Citrus Estate: block U5A) in the 2009/2010 season. We investigated the effects of partial ... -
Application of optical methods to determine the concentration of sugar solutions
(2012-09-07)Two optical methods were used to determine the concentration of sugar (sucrose) solution. The first employed a hollow perspex prism, a prism spectrometer and a monochromatic light source. The angles of minimum deviation ... -
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 ...
