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...
ABSTRACT This study addresses the analytic approach to decision making and its application to manpower planning in the crown section of a bottling company in Nigeria. The company produces crowns for several bottling companies and was faced with the challenge of meeting customer’s demand, which varied from month to month. A work sampling technique was used to investigate the discrepancy between the level of the work force and their output. The result of the work sampling study showed that al...
ABSTRACT One of the major problems confronting healthcare professionals is the control of pathogenic organisms. This is because microorganisms are present in our environment and may contaminate healthcare instruments from time to time. An autoclave was designed and constructed to sterilize materials/items used in such healthcare institutions. The autoclave has a liquid capacity of 2 litres and is heated electrically with a 2kw heating-element. The test showed a decrease in the growth of micro...
ABSTRACT Large quantities of agricultural and mill residues which are generated annually in Nigeria constitute environmental health hazards. Densification of these residues which is a major way of converting them to high quality fuel has not been adequately studied in Nigeria. The objective of this study was to develop and evaluate a system for briquetting and combusting Gmelina arborea sawdust and maize cob particles. Gmelina arborea Sawdust (GS) was obtained from a small-scale sawmill in Ib...
Abstract. Studies were conducted to evaluate the performance of drip irrigation and fertigation system on the yields of sweet maize and telfairia OCL·irtclltalis. Three treatments: watering once per week ((i.JR lures) (W;), twicc (11M:, 1itrcs) (W2), ,Ind thrice. (17.16 1itrcs) (V)) WCIC applied to sweet 1II'li;,(. Four tl'L'.;ltIIIClils: 17 litl'l:s (WI), I S7() lit res (W,), 170 litrcx ('IV}), 22.05 litrcs (W4) and lour Icrtigation levels: SLi.0kg/iJ'l (I:I!: 68.0Gkg/ha (F2); 81.92kg/ha (F...
ABSTRACT Retbiliry indices ore considered to be remonabk md logic wuys to judge the perfirmame of rm electric power tystem ReliabiIi~in dices which m proposed by the IEEE are used ra evaluate the perfmmce of selected distribution.~stemo n the natlonai grid. Ten yems of outage data (1998 - 200 7) from seven selected disi?ibwtl'on systems on the national grid were wed as case studies in this resewch work. A generalized model is developedf or a qsrantimive evalucrti~nof relative indices of the n...
ABSTRACT Porosity is a majw defect in cast aluminum alloys affecting in particuIm, the fatigue strength. l%e pom sewe cr9 points of saess concenmrion mdpolnts of crud initiation for evenfwI f~ilwe. In this work Fractal undysis was used to numericdy chmucferke the pores in mi-directiondly solidfleddl 4.5 WI % Cu alloy microgrqhs, nrnlsverse section at a distance of I4mm porn the mefaUchitl mold inteflme. l%e Spatial Point PaTtern (SPP) and the Multi-stage randbm samplng (MR$l methd were used 1...
ABSTRACT Power transmission shafts, such as the crankshaft, impeller shaft, propeller shafts, camshafts ere, are essential machine elements with wide application in mechanical systems. The manual shaft design procedure is known to be tedious and complex because of large numbers of formulas, many. computations and' iteration procedures involved in the design. However, the use of Computer Aided Software (CAS) offers improved accuracy, high speed computations, reduced rigorousness and cumbersome...
ABSTRACT Several factors influence the quantity of charcoal production in different parts of Nigeria. The study investigated species selectivity for charcoal production in three ecological zones of Nigeria. Data were obtained through the use of structured interview schedule administered to three hundred and twenty seven respondents selected through snowball. The data were subjected to descriptive and analysis of variance. The results show that the mean age of respondents was 44, male (88.1%),...