ABSTRACT The issue of EMF radiation has for years been received with mixed feelings by all stakeholders. In this study, the relationship between EMF exposure levels with distance from the mobile base station has been illustrated. The contributions of each frequency band used by mobile operators in Zimbabwe, with reference to the area of study has been assessed and compared using well informed data and assumptions. Graphs have been used to clearly show such contributions and matlab was used fo...
ABSTRACT The thesis addresses the fundamental means of overcoming the challenge posed by voltage collapse to the success of electricity market unbundling. As regards the record available from the recent deregulation and unbundling of the Generation and Distribution segment of the electric power system, it has become evidently necessary to investigate the best and optimal operating conditions under which the transmission system is expected to perform with respect to the high level of transact...
ABSTRACT Modern power systems are operated under various constraints which are meant to ensure an appropriate delivery of service. Meanwhile power system faces imbalance in power generation and its consumption in which the higher the load consumption the lower the frequency of operation. The governor-turbine combination will then experience a devastating reduction in its frequency of operation due to disturbance that may lead to system collapse. Both governor and turbine are included in the ...
ABSTRACT In recent times, the issue of the gap between electricity supply and demand has been addressed using distributed generation (DG) technology. When DG technology is properly placed within a transmission and distribution network, there is always improvement in power loss reduction, voltage profile and system reliability. Proper placement can be achieved by evaluating the optimal values for voltage deviation, real power loss and bus voltage. Thus, this study presents a multi-objective D...
Abstract This study evaluated the economic and environmental potentials of improving the energy efficiency of the lighting technology at the University of Lagos, Nigeria. The energy audit report for the Faculty of Engineering, University of Lagos before retrofitting shows that all lighting fixtures in the lecture rooms are the 1.2 metre inefficient fluorescent lamps. The cost effectiveness of lighting retrofitting with Compact Fluorescent Lamps (CFL) and Light Emitting Diode tube (LED) light...
ABSTRACT The PID controller still remains a widely used and very effective means of achieving stability in control systems. Generally, the performance of the controller is determined by the proportional, integral and derivative gains of the controller. The classical techniques: ZieglerNichols (ZN) open loop method; ZN closed loop method; Chien-Hrones-Reswick (C-H-R) load rejection method; and meta-heuristic technique: the fuzzy logic algorithm, are used to determine the tuning parameters of ...
Abstract In the last half decade data traffic has surpassed voice traffic in telecommunications networks. Legacy networks could not cope with the overwhelming data traffic and exponential increase in subscribers. To address legacy systems limitations in this regard 4G LTE was introduced. With reduced network elements and advanced robust modulation technologies 4th generation systems offer data speeds much more than 3G and wired networks. In addition, 4G offers a variety of services which coul...
BSTRACT Phytosynthesis of TiO2 NPs from Ximenia Caffra leaf extract and their application in poultry feeds as an antibacterial agent was done. Reaction time and pH effect for the synthesis of TiO2 NPs were optimized using a single factor method. A Central Composite Design (CCD) was used to determine the effect of linear factors (titanium tetrachloride concentration, temperature and leaf extract volume) and their interactions on the synthesis of TiO2 NPs. A total of twenty experiments formulat...
Abstract This research work studied the behaviour of Africom’s converged network, measured and evaluated the QoS of service of the network with the various traffic streams. Its objective was to identify and measure the different metrics that affect the delivery of QoS in the network. Parameters for measuring QoS were be identified and measured and the overall performance of the network evaluated. The approach that was adopted was guided by the subscriber concerns as well as the technical pa...
ABSTRACT A new simple novel electrochemical sensing platform based onelectrodeposition ofnano zinc oxide ontomultiwalled carbon nanotubes modified glassy carbon electrode was constructed. The modified electrode was characterized by cyclic voltammetry and electrochemical impedance in a redox probe.The electrode surface area after modification was 0.15 cm2, which was twice large that of a bare glassy carbon electrode. The new fabricated sensor was applied for individual and simultaneous determi...
ABSTRACT This research looks at the prison community as a discourse community. The study also provides a sociolinguistic analysis of the language used at Whawha Medium Offenders Prison. Through the analysis of language the study also explores certain aspects of prison life at Whawha prison complex. The study uses the ‘sociolinguistics theory’. The research examines Whawha Prison Complex as a discourse community, investigates how the inmates at Whawha Prison Complex use language in a pecul...
ABSTRACT This report serves to give an account for a research on a Public Transport Inventory Monitoring System for Developing Countries. The research is based on the current situation in Zimbabwe where the public transport industry is dominated by the informal sector. In this document there is a discussion of the transport industry in Zimbabwe, identification of the problem of accountability of inventory in the current industry, a methodology to help solve the problem and the results of usin...
ABSTRACT The research focused into the impact of Information and Communication Technology (ICT) based technologies in the teaching and learning at Early Childhood Education (ECE) level settings in the context of the new curriculum in Bulawayo Urban schools. The study was conducted at Riverside Stimulation Centre in Imbizo District in Bulawayo Metropolitan Province. Ten ECE teachers formed the sample. Questionnaires were used to gather information from teachers. Focus groups interviews were us...
ABSTRACT The kinetic analysis of three complex reaction networks of catalytic reforming reaction systems has been studied. The complex systems of reaction networks were first fashioned into a system of single reactions. Each single reaction is then delineated into a sequence of elementary reaction steps. The principles of rate determining step, steady state approximations and microscopic reversibility were then involved for necessary simplifications Kinetic and equilibrium parameters for mode...
ABSTRACT An electrochemical sensor based on polyaniline cobalt phtahlocyanito doped with cobalt oxide nanoparticles was developed for the electrocatalytic oxidation of amitrole.FTIR, Electrochemical impedance spectroscopy (EIS) and Bode plots were used in the characterization of the synthesized modifiers CoTCPc, PANI, Co2O3NPs and to ascertain the chemical linkage between CoTCPc and PANI while cyclic voltammetry, linear sweep, chronoamperometry and differential pulse voltammetry were used to ...