Abstract A gas-fired oven for commercial production of bread was designed and constructed using locally available material, and was subjected to various'tests to come out with its performance characteristics. Itsperformance was evaluated and then compared withsrespect to the total time required to bake a specified mass of white flour dough using the gas oven with that used by clay wood fired oven for the same mass of white flour dough. ., The outcome of the test result indicated that the ni&x...
ABSTRACT A survey was carried out to identify the types of crops popularly stored, the structures commonly used and problems experienced with produce storage in the Kingdom of Swaziland. Respondents included operators of government storage facilities, non-governmental organizations providing food relief, millers, large-scale farms, homesteads and artisans who fabricate metal tanks. Maize, the national staple food, was stored by all homesteads essentially for family consumption. It was the com...
Abstract This paper investigates the dynamical behaviour of a duffing oscillator using bifurcation diagrams. There has been growing interest and challenges in engineering dynamics to characterize dynamical systems that are chaotic using bifurcation diagrams. The relevant second order differential equations using Runge-Kutta method were solved for ranges of appropriate parameters. The solutions obtained were used to produce the bifurcation diagrams using Microsoft excel 2007. Since an average ...
ABSTRACT Solar Photovoltaic (PV) can be considered as one of the most reliable and promising renewable systems. This is of great importance for developing countries like Nigeria especially in the rural communities where there is little or no access to electricity. The use of solar energy will no doubt contribute to the improvement of the living conditions of these villag- ers. Solar PV systems have been installed in some villages in Nigeria but unfortunately, the expected benefits from us- in...
Photovoltaic Characteristics of Thin Film of CU2SNS3
Abstract This research assessed, among others, the current status and the impact of Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) applications in the Nigerian industrial and technological sector. Two prominent cities Lagos and Ibadan were selected as centers of case studies to establish the level of the applications. Data was collected from industries within the 2 cities in the areas of manufacturing, design, production, construction and consultancy service units during a...
Abstract. The level of utilization of many public utilities is, most often. influenced by their locations. Huge public funds are spent annually on the provision of several public infrastructures, such as pedestrian bridges, that are grossly underutilized due to their poor location or citing. This study was aimed at developing a fuzzy logic based decision support system for the optimal location of pedestrian bridges in a typical Nigerian city. Various factors. and their interactions. that affe...
Abstract: Fiscal regimes are very important in the global Petroleum Exploration and Production (E&P) industry. They sharpen policies, management strategies and revenue (take) by governments while defining the attractiveness of the industry to investors. One of the major parameters in fiscal regimes is royalty oil, which could be fixed or adjustable on a sliding scale. Nigeria, which has used fixed royalty scale since the first oil in 1958, is now proposing a change to the sliding royalty scal...
Abstract The welding workstation usually generates intense heat during operations, which may affect the welder's health if not properly controlled, and can also affect the performance of the welder at work. Consequently, effort to control the conditions of the welding workstation is essential, and is therefore pursued in this paper. This paper develops a mathematical model that maximises the work output while minimising energy consumption at the welding workstation. Particular emphasis is pla...
ABSTRACT The Power Holding Company of Nigeria (PHCN) is responsible for generating, transmitting, distributing and selling electric power to the various consumers throughout the country. The paper presents the results of an investigation conducted on some of the operations of Power Holding Company of Nigeria (PHCN) to determine some of the major factors affecting the availability of power supply to consumers in Benin City area of Nigeria. The average number of operating transformers in va...
Effect of Selected Pre Treatment on Setting of Cement Composite from Two Rattan Species. AbstractThe effects of aqueous extraction and removal of vilified epidermis from rattan canes on the maximum hydration temperature (Tmax) and settling time (tmax) of two rattan cane species, Calamus deerratus and Lascosperma secundiflorum, mixed with Portland cement were investigated. Max ranged from 37.0 to 58.6oC and from 43.1 to 56.8oC for the C. Detritus and L. secundiflorum composites respectively wh...
Abstract Abundant energy supply is the lifeblood of modern civilisation. Energy poverty arising from poor management despite appreciable energy resource base continues to be a major constraint on the socio-economic development of Nigeria. The crucial challenge of the energy sector in the country includes inadequate energy supply, its security and sustainability. In this paper we briefly examine the roles of the major primary energy forms in the country as well as some of the alternative energ...
ABSTRACT In this study, the feasibility of an artificial neural network (ANN) based model for the prediction of solar energy potential in Africa was investigated. Standard multilayered, feed-forward, backpropagation neural networks with different architecture were designed using NeuroSolutions®. Geographical and meteorological data of 172 locations in Africa for the period of 22 years (1983- 2005) were obtained from NASA geo-satellite database. The input data (geographical and meteorological...
Abstract Energy uti Iisatiou at V~)I"ki11 tile labour-i ntensi ve bui leiing industry is of prim importance to contractors who match people to jobs. This paper provides an insight into modelling energy expenditure ill a specific task, namely brick laying in various postures. It therefore lakes previous "generic" biomechanical-energy prediction models, and makes the case Ior apply: Ilg and adapting broader theoretical models to a specific occupational task. This refinement of established model...