Abstract The dissipation of information is an essential aspect of any community. The advent of media services such as television and radio has improved the way information has been broadcasted to the general public. Unfortunately in Zimbabwe Universities, these services have not yet been utilized. This Dissertation illustrates a prototype of campus radio streaming system over an intranet. This is to provide local universities with a cheaper alternative to providing a local radio station compa...
ABSTRACT A comparative analysis of the efficiency of activated carbon produced from Berchemia discolour seed shells derived activated carbon (BDSAC) and commercial grade activated carbon (Haycarb Carbon) was utilized in the adsorption of gold (iii) chloride from acidic medium. The adsorption process of BDSAC was best described by the Freundlich, Halsey, Dubinin Radushkevich (D R), Temkin isotherms and Langmuir isotherm had RL values in the range 0 < RL < 1 hence the adsorption process was fav...
Abstract In general, the electrowinning process consumes substantial electrical energy. Considering the ever-increasing unit cost of electrical power there is a need to improve current efficiency so that electrical energy is utilised efficiently. In light of the research/knowledge gap identified, this research aims to design a continuous quality improvement framework for improving electrowinning current efficiency. The objectives of this research are as follow: (i) To explore factors that inf...
Abstract A novel study on biomass-air gasification using a horizontal entrained-flow gasifier and catalytic processing of the product gas has been conducted. The study was designed to investigate the effect of catalyst loading on the product gas. The use of a horizontal entrained-flow gasifier reactor was used to assess the effect of the gasifier reactor orientation on the gasification process. Both experimental and computational fluid dynamics (CFD) approaches were employed. The gasifica...
ABSTRACT Ascorbic acid and dopamine are biomolecules found in humans. They both have important functions in the body and cause numerous side effects at high concentrations. An electrochemical sensor based on nickel( II) tetra amino phthalocyanine conjugated to iron oxide doped graphene oxide nanosheets was developed.FTIR,UV- vis, cyclic voltammetry ( CV) and electrochemical impedence spectroscopy (EIS) were used for characterisation of electrode modifiers.FTIR was used to ascertain that a che...
ABSTRACT Prior studies have identified many problems of having poor water sanitation system. The major problem being rise of water-borne diseases. This thesis is an advancement to an argument that the leading root cause of the water-borne disease outbreaks in Zimbabwe was the unsustainable urban environmental practice especially in the water reticulation system. The overarching purpose of this project is to give a solution to a case in which the failure in proper water reticulation system in ...
ABSTRACT Home/ Bank/ Office security has been a major issue where crime is increasing and everybody wants to take proper measures to prevent intrusion. The project is aimed at developing the security of home against Intruders. In a case of intrusion while the user is out of the house, then the device sends SMS to the emergency number provided to it and also display it on LCD connected to it. The paper consists of a background into the area At mega 2560 microcontroller, sensing elements and GS...
ABSTRACT This research is based on the modification of a glassy carbon electrode with cobalt (II) tetra carboxy phthalocyanine and nitrogen doped graphene oxide nanosheets composite (CoTCPc/N-GONS) was used for the electrocatalytic oxidation of nitrites. The synthesised cobalt (II) tetra carboxy phthalocyanine (CoTCPc) and nitrogen doped graphene oxide nanosheets (N-GONS) were characterized by FTIR spectroscopy, UV-Vis spectroscopy, electrochemical impedance and cyclic voltammetry. The electr...
ABSTRACT The study was conducted in Mbarali District of Mbeya Region with the objective of assessing the average annual utilization rates of farm tractors for both on-farm and off-farm activities during the cropping season of 2012/13. The study conducted aimed at addressing the following research questions: who are the owners of farm tractors in the study area, what models were in use and what were the available support services that could enhance sustainable utilization of tractors? Question...
Abstract This dissertation analyses the use of RFID cards as e-passports instead of the conventional paper passport booklet with an embedded chip as the e-passport. Advancement in technology comes with so many possibilities that all information can be stored electronically. The purpose is to limit the use of counterfeit documents. This in turn will prevent illegal entry of the traveller into any specific country at the same time maintaining the privacy and personal security of the e-passport ...
ABSTRACT In many types of buildings, both single and multi-storey, including schools, offices, places of worship, factories and residential buildings, the attic space is often given paramount consideration because its thermal characteristics have great influence on the conditions of the space directly below it. A significant amount of the cooling load in residential and industrial buildings is the result of heat transfer across the ceiling from the attic. Also, in some rural areas in the trop...
Compliant mechanisms (CMs) above the traditional rigid-body mechanisms have the sole merit of no relative moving parts hence preventing any form of wear, backlash, noise and need for lubrication. Its applications are versatile and fully domicile in such sectors as medicine, robotics, aerospace, biomechanics, food processing and automotive industries to mention a few. The Pseudo Rigid Body (PRB) equivalence of compliant mechanisms have been the conventional approach used by earlier researchers...
ABSTRACT The biodesulfurization of diesel and kerosene was investigated. Soil samples were taken at various points of the Ijora petroleum products haulage terminal, in Lagos, Nigeria. Microorganisms capable of selectively abstracting sulfur from diesel and kerosene without reducing their fuel values were isolated by using a sulfur-reducing selective medium. The choice of the sulfur selective reductive pathway is informed by the fact that it is sulfur specific and so the calorific value is ma...
ABSTRACT The laminar free convective heat transfer characteristics of parabolic enclosures have been investigated using numerical computation and experimental modeling methods. The geometry is a long cavity made up of a parabolic wall bowed over a horizontal wall. Due to symmetry, the analytical model is one half of a two-dimensional cross-section consisting of a hot parabolic upper-wall, a cold horizontal base-wall of width B, and an adiabatic vertical wall of height, H. Two cases of heat-in...
ABSTRACT The Asymmetrical Single - phase drive has an input power factor problem over its control range. With the race towards industrialisation, power networks in developing economies would face increasing power factor problems with extended application of these drives in industrial and traction systems. This project investigates the assertion that power factor of supply networks with multiple drives deteriorates with increased number of drives. The power factor problem is established analy...