Browsing Faculty of Science e-Theses Collection by Title
Now showing items 185-204 of 257
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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 ... -
On Groups which are Products of Weakly Totally Permutable Subgroups
(2014-04-24)This work is a contribution to the theory of products of finite groups. A group G = AB is a weakly totally permutable product of subgroups A and B if every subgroup, U of A such that U ≤ A ∩ B or A ∩ B ≤ U, permutes with ... -
On the analysis of risk premiums in power markets using the Barndorff-Nielsen and Shephard model with leverage
(2017)This thesis is devoted to the study of risk premiums in power markets using the Ornstein- Uhlenbeck process with Barndorff-Nielsen and Shephard stochastic volatility with leverage. Forwards were priced using a class of ... -
Optical, thermal and structural characteristics of carbon-in- silica selective solar absorbers coatings synthesized by Sol-Gel technique
(2014-06-27)Carbon-in-silica composite films have been fabricated using sol-gel synthesis of silica and carbon precursor materials, followed by carbonization in an inert atmosphere. Four categories of samples were fabricated and ... -
Optimal stochastic control and risk minimisation in Insurance
(2014-06-17)The thesis examines a generalised problem of optimal control of a firm through reinsurance, dividend policy and convex risk minimisation in the presence of market friction. The major mathematical tool applied is the ... -
Optimisation of the growth conditions and genetic characterisation of Pleurotus species
(2012-08-29)A comprehensive genetic and optimisation of the growth conditions study of fifteen Pleurotus species and strains from Belgian Coordinated Collections of Microrganisms/ Mycotheque de l’ Université Catholique de Louvain ... -
Patterns of Elephant (Loxodonta Africana Blumenbachi) Browsing in Faidherbi Woodlands Of The Zambezi Heartland Floodplains In Mana Pools National Park (Zimbabwe) And Lower Zambezi National Park (Zambia)
(2012-08-28)Patterns of elephant browsing in Mana Pools and Lower Zambezi National Parks’ riverine vegetation were investigated in sixteen and five variables transects, respectively. In each transect, tree and shrub species were ... -
Pest status of the larger grain borer, prostephanus truncatus (horn) (coleoptera: bostrichidae) in zimbabwe and an assessment of inherent susceptibility of selected maize varieties to the pest
(2013-09-23)This study determined the occurrence and importance of Prostephanus truncatus (Horn), the larger grain borer (LGB) (Coleoptera: Bostrichidae) in relation to other storage insect pests in farm-stored maize grain samples ... -
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 ... -
Population Dynamics of Marula, Sclerocarya birrea sub sp. caffra in Mwenezi, Zimbabwe
(2012-08-29)This study, conducted in Ward 3, Mwenezi, determined the abundance, distribution and size structure of Marula, Sclerocarya birrea subsp. caffra. The relationship between incidence of debarked stems and size structure was ... -
Population Structure and Patterns of Regeneration of Zambezi Teak (Baikiaea Plurijuga) Logged at Different Periods in Gwai Forest, Zimbabwe.
(2012-08-29)Prudent management of natural forests requires information on their ecological status that can be estimated by monitoring population structure and regeneration especially in the presence of exploitation such as logging. A ... -
Possibilities of water pollution in Cheche and Mtilikwe rivers by stillage from Triangle
(2016-04)The main aim of this project was to perform an investigation on the possible impact of Triangle limited stillage on Cheche and Mtilikwe river water quality. This was done by measuring physico- chemical parameters and ... -
POSSIBLE SIMPLIFIED RATE MODELS FOR THE STUDY OF THE EMISSION SIGNAL ENHANCEMENT DUE TO EASILY IONIZABLE ELEMENTS DURING FLAME ATOMIC EMISSION (FAES) AND INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMMETRY (ICP-OES)
(2012-08-02)The effects of excess Na and K on K and Mg atom line emission during air-acetylene flame atomic spectrometry (FAES), and of excess Li and K on Ca, Mg and Sr atom and ion lines in the inductively coupled plasma (ICP), were ... -
Preliminary studies on the winter season abundance and fitness of tephritid fruit flies in the Harare area, Zimbabwe
(2016-04)Fruit flies (Diptera: Tephritidae) are among the major constraints in commercial fruit production in many developing African countries. Due to their economic importance, knowledge of the tephritid fruit fly spectrum ... -
Preparation of activated carbon from tobacco stalks using microwave assisted chemical activation for water purification
(2016-11)Tobacco crop is an economically important crop. The remaining stalk after reaping the leaf however presents environmental pollution challenges. The carbonaceous nature of the stalk on the other hand makes it a promising ... -
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 ... -
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 ... -
Promoter single nucleotide polymorphisms in pro-inflammatory cytokine genes in S. haematobium infected and the risk of prostate cancer development
(2021-10)This thesis reports the findings of a thorough study to establish the role of the genetic variations in the pro-inflammatory genes and the risk of developing prostate cancer (PCa) in male individuals residing in a ... -
Purification of water using surface engineered zeolites
(2018)Coal fly ash obtained from Coca Cola Company in Harare was utilised in synthesis of zeolites by hydrothermal method using 3M NaOH. The Ze-ZnO nanoflakes and Ze-ZnO nanorods were successfully synthesised using a combination ... -
Quality of Service in Wireless Ad-hoc Networks
(2012-08-29)As a consequence of the increased popularity of wireless local area networks (WLANs) based on IEEE 802.11, the interest for ad hoc networks has also increased. An ad-hoc network is an autonomous wireless network that can ...
