Faculty of Science: Recent submissions
Now showing items 261-280 of 317
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Collaborative Learning in an ICT Text Based Synchronous and Asynchronous Learning Communities. What Impact Does it Have on Learning Outcomes?
(2012-08-29)This dissertation analyses collaborative learning in synchronous and asynchronous learning communities and come up with the best suitable e-learning community for the Zimbabwean distance students. It focuses on the University ... -
Designing a Quality of Service for mobile Ad Hoc Networks carrying multimedia traffic.
(2012-08-29)Multimedia transmission over communication networks has been growing rapidly with respect to the number of users and the amount and type of traffic. Wireless communications are a fast emerging technology and have become ... -
The use of knowledge bases as repositories in learning environments.
(2012-08-29)This dissertation proposes a method of management of Learning Objects Repositories (LORs). It looks at both the storage and search of learning objects (LOs) in the LORs. The focus is on how LORs can be structured in order ... -
Challenges for TFRC as a Real-Time Protocol Over Multihop Wireless Ad Hoc Networks
(2012-08-29)Multihop wireless networks are emerging as a natural extension of the global Internet for scenarios where wired connections are unfeasible, impossible, or undesired. In these networks,nodes cooperate among themselves by ... -
MANETS/VANETS in AutomobileSystems: A Simulative Study into how Mobile Ad-hoc Networks can be used in Traffic Control Systems
(2012-08-29)This thesis describes the modeling and implementation of an advanced traffic signal control system within a simulation environment, thus creating a laboratory for the evaluation of advanced traffic control strategies ... -
Using Genetic Engineering Algorithm to Prevent Subversion of an Intrusion Detection System
(2012-08-29)Intruders mercilessly attack commercial, academic, defence; healthy centers distributed (networked) systems frequently, and often successfully. The challenges of intruders have become very critical. The most perceived ... -
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 ... -
Influence of Brachystegia spiciformis and Parinari curatellifolia on herbaceous flora and soils in Mukuvisi Woodlands, Harare
(2012-08-29)A comparative study between B. spiciformis and P. curatellifolia’s isolated and clumps of trees’ influence on patterning and structure of herbaceous flora and soils with those of adjacent open grasslands was conducted in ... -
Switch: An Extensible Framework for the Generation of Bespoke and Dynamic Software Development Models
(2012-08-29)Attempts to come up with a single Software Process Model (SPM) that can be used in all development scenarios have failed. The same can be said for the approach that seeks to come up with an authoritative and exhaustive set ... -
Impact of the invasive alien species, LANTANA CAMARA (L). on native vegetation in Northern Gonarezhou National Park, Zimbabwe
(2012-08-29)This study assessed the impact of Lantana camara invasion on native vegetation in Northern Gonarezhou National Park (GNP), Zimbabwe. Stratified random sampling was used with three categories; uninvaded, moderately invaded ... -
Distributed deadlocks in distributed databases
(2012-08-29)The developments of database management system (DBMS) technology has run in parallel with the developments in computer networks and distributed computing technologies. Consequently there is the birth of distributed ... -
Relational Database Framework for Geo Spatial Data Sets
(2012-08-29)Geographic Information Systems (GISs) have emerged as the most powerful and effective decision-making tools in terms of gathering, analysis, interpreting, distribution and using geographically referenced (Spatial) data for ... -
Study of ephemeral rock pools on Domboshawa Mountain, Zimbabwe.
(2012-08-29)Five ephemeral rock pools were sampled weekly from December 2006 to May 2007 on the Domboshawa Mountain. Physical variables, which included temperature, pH, dissolved oxygen, phosphorus, nitrogen, conductivity and pool ... -
Modelling a low cost, data acquisition and irrigation sequencing system for a greenhouse on an 8 Bit PIC Microcontroller
(2012-08-29)The debate on climate change is still going on and on, and there is still no convincing evidence that greenhouse gases are the real, real cause of the recent changes in climate patterns. Some records tend to suggest that ... -
Trophic Interrelationships Amongst Cichlid Fishes in a Tropical African Reservoir (Lake Chivero, Zimbabwe)
(2012-08-29)The diet of seven cichlid fish species of Lake Chivero was investigated from October 2004 to April 2005. Oreochromis niloticus and O. macrochir were microphages feeding on a wide range of algae of which Microcystis sp., ... -
Using Modelling as a Management Tool for Water Resources: Identifying Problems and Causes and Providing Solutions to Current Eutrophication Problems in Lake Chivero.
(2012-08-29)The PAMOLARE model can be used as an effective tool for managing water resources. Projections show that in the next 25 years Lake Chivero’s water quality will further deteriorate if there are no measures taken immediately ... -
Nutrient Limitation of Phytoplankton in Five Impoundments on the Manyame River, Zimbabwe
(2012-08-29)Nutrient limitation was investigated in the Manyame lakes during 2004-05, namely, Harava Dam, Seke Dam, Lake Chivero, Lake Manyame and Bhiri Dam. Selenestrum capricornutum was used as the test organism in one group of ... -
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 ... -
Influence of Physiographic, Edaphic and Anthropogenic Factors on the Structure, Composition and Species Diversity of Vegetation in the Mazowe Botanical Reserve, Christon Bank.
(2012-08-29)The influence of physiographic, edaphic and anthropogenic factors on vegetation structure, composition and diversity of Mazowe Botanic Reserve, Christon Bank, north of Harare, Zimbabwe was investigated. The sampled area ... -
Stream Fish Assemblages Along the Longitudinal Gradient of the Nyangui River.
(2012-08-29)This study investigated the influence of longitudinal and environmental gradients on fish biodiversity in a central African context. The Nyagui River was used as a study site. Fish and microhabitat data were collected at ...
