Abstract: This study was dealing with assessment of groundwater quality and its fitness for agriculturaland domestic uses for Umbada district in western Omdurman, Sudan. The objectives of the study were to determine the groundwater quality through chemical and microbiological analyses for the samples taken from the studied boreholes in the area under investigation. Water samples for five groundwaterwells were collected in poly ethylene bottles and analyzed physically, chemically and bacterio...
ABSTRACT This research evaluates air transportation safety in Nigeria. Records of aircraft crashes in Nigeria were extracted from different archives to create a database of air traffic incidences within the air space of Nigeria since Independence. Statistical overview of air transportation accidents in Nigeria using accident data to examine a national trend in air transportation disasters was carried out. Results of the analysis showed that air traffic accidents in Nigeria have increased per...
Abstract This work tests the hypothesis that nanoparticles of 75 at.% platinum (Pt) composition and anisotropic morphology, will outperform standard catalysts in (PEMFC) hydrogen fuel cells. A survey of the scientific literature on this topic is first presented. The synthetic strategies which were developed for the preparation of novel Pt-based binary (bimetallic) and ternary (trimetallic) nanoparticles, containing nickel (Ni), cobalt (Co) and/or vanadium (V), are then described. The synthes...
Steel plays a very key role in the transformation of an economy, as it is the key driver in any industrial revolution majorly being used in transport, building and construction, power generation and machinery. It is in this regard that the study of iron and steel in Kenya is important. This study sought to determine the viability of setting up an iron and steel processing plant in Kenya, develop a process design for such a plant and determine the plant's economic feasibility. This research em...
Abstract An investigation is presented into the mechanisms governing both the ageing and axial cyclic loading characteristics of displacement piles in silica sands. The thesis considers first the state–of–knowledge regarding the axial capacity of displacement piles in silica sands. Three main areas of uncertainty are identified; the stress regime setup by installation, the mechanisms of ageing that lead to capacity increases with time (set-up), and the effects of axial cyclic loading. Ne...
ABSTRACT Several attempts have been made to optimize the design of bridge and roof trusses. This work presents the development of an Expert System (ES) for the optimal design of bridge trusses subjected to moving loads and roof trusses as well. The research improves on such previous attempts in many areas including automation of structure data generation, experience gaining facilities, suggestions and decision making, flexibility, and structural arrangement, shortest possible volume of input...
ABSTRACT In Nigeria, a large number of jacket platforms installed in the Niger Delta have been operating beyond design life of 25 years due to the exorbitant cost of replacement with new ones. These Jacket structures often undergo corrosion and fatigue damages due to hostile offshore conditions and accidental release of corrosive agents from crude oil production activities. Therefore, there is a growing need to closely monitor the structures to protect unexpected failures. Applications of ap...
ABSTRACT Increase in population led to the growth of industrialisation which has stimulated the development of alternatives to produce electricity, including the use of coal. Coal-fired power plants produce an abundant amount of electricity, addressing the ever-increasing electricity demand. Power plants produce fly ash as a result of coal combustion for electric power generation. The Van Eck Power Station is the oldest and only coal-fired plant in Namibia that is located at the outskirts of ...
INTRODUCTION The power sector in Nigeria is in a deplorable state due to many factors.
Abstract In the United Republic of Tanzania (URT), all environmental issues related to the mining industry are regulated according to two principle Acts: The Mining Act and the Environmental Management Act, and their respective regulations. The current acts were enacted in 2010 and 2004 respectively. Mineral exploration (that includes all on-site activities performed before a mining project is declared feasible) projects in URT appears to be “unforgotten phenomena” in the two major legis...
Abstract: This paper presents the results of a mathematical model developed for predicting the 28-day compressive strength of foamed aerated concrete containing pulverised bone as partial replacement of cement for the purpose of quality controls. Strength-porosity relation was used as a basis for the development of the model, and the Bisection Methods of Numerical analysis was used to evaluate the inherent constants. For all the percentages of cement replacement with pulverised bone, the exp...
Abstract: The unbalance application of the hydropower and others renewable energy generation in west Africa, constant rise in the demand of energy, which leads to damping in the electricity supply and the importance of reducing greenhouse emissions, has brought the adoption of clean renewable energy sources for generation of electrical power. One of these sources that have the potential to supply the world’s energy needs is the ocean (Home of waters). The current utilization of ocean area...
ABSTRACT Lagos State has grown from 300,000 and 500,000 in 1950 and 1991 to an unprecedented population of 15.7 million (Mabogunje, 2002). Already, it is projected to have a population of 25 million by 2015 which will make Lagos the third largest megacity after Tokyo and Bombay and a population of 29 million by 2020, with an annual growth rate of 8 %( UNCHS, 1996; George, 2010; LWC, 2011). This scenario presents enormous emerging challenges as well as opportunities that are numerous, diverse...