ABSTRACT Nigerian gas reserves is currently characterised by high production/reserves ratio due to increasing demand from liquefied natural gas, power generation plants and other industrial users. There has been increasing efforts at identifying new opportunities for conventional and/or nonconventional gas reserves. The Campano-Maastrichtian Nkporo shale is one of the potential sources of non-conventional gas reserves in Nigeria. Despite geological, geophysical and geochemical evaluations th...
ABSTRACT This work studied the biodegradation of the spent MWFs by using two inocular conditions: Indigenous microorganisms and seeding with Pseudomonas and Bacillus species (both earlier isolated from MWFs) both in a locally designed bioreactor. The performance of each inoculum condition was monitored by total viable bacteria counts, chemical oxygen demand (COD), biological oxygen demand (BOD), total organic carbon (TOC), oil and grease content and heavy metals residue over a 15-day period. ...
Abstract Song list generation, a crucial component of m us IC information retrieva I system. has been carried out based on users experiences and bias with no quantitative method to guarantee the generation and repeatability or harmonious arrangements. In this study, the problem of generating harmonious song-list has been modelled as a Single Machine Set-up Problem (MSP) and a solution software developed. Music factors that affect user perception and cognition of a smooth transition were iden...
Abstract: Most printing presses ill developing countries arc located in buildings with inadequate natural and mechanical ventilation such that the press operators work for major hours in poor indoor air quality buildings, which expose them to a wide range of health hazards such as lead poisoning. Understanding how poor air quality affects the operator's body system is studied using a methodology involving the principle of diffusion and the law of mass action. /I. hypothetical press in Nigeri...
Abstract Determination of friction factor is an essential prerequisite in pipe flow calculations. The DarcyWeisbach equation and other analytical models have been developed for the estimation of friction factor. But these developed models are complex and involve iterative schemes which are time consuming. In this study, a suitable model based on artificial neural network (ANN) technique was proposed for estimation of factor to friction in pipe flow. Multilayered perceptron (MLP) neural netwo...
ABSTRACT Energy audit was conducted using the energy accounting method in seven palm oil processing mills. The mills were stratified into small, medium and large categories based on the levels of mechanization and daily production capacity. The production process in three mill categories was divided into eight defined unit operations: bunch transportation, detachment and plucking, bunch sterilization, fruit digestion, pulp pressing, oil clarification, oil drying and oil packing. The energy (...
ABSTRACT The paper presents the results of investigation on the effect of soaking time on the yield strength, ductility and hardness properties of annealed cold-drawn low carbon steel. The low carbon steel cold-drawn at 40% deformation was annealed at 900 deg Celsius for soaking times of 10, 20, 30, 40, 50 and 60 minutes. Tensile, charpy and Brinnel hardness tests were conducted to determine the yield strengths, tensile strengths, impact strengths, ductility and hardness of the annealed stee...
ABSTRACT This research work investigated the corrosion resistance of nickel plated medium carbon steel in cocoa liquor. It simulated the effect of continuous use of the material in a cocoa liquor environment where corrosion products are left in place. Medium carbon steel samples were nickel electroplated at 4V for 20, 25, 30, and 35 mins. using Watts solution. The plated samples were then subjected to a cocoa liquor environment for 30 days. The electrode potentials mV (SCE) were measured eve...
Abstract This research work investigated the modeling of Von Mises stress in LNG Spherical Carbon Steel Storage tank using assumed displacement Finite Element analysis based on shallow shell triangular elements. Using equations of elasticity, constant thickness carbon steel spherical storage tanks were subjected to different loading conditions. This paper stresses the need for proper definition of shallow element using sector angles to obtain the shallowness. The shallow spherical triangular...
ABSTRACT A bone-crusher ( Haminrrer Mill ) was designed, constructed and tested. The machine was designed to crush 1000kg of bones in one hour. The motor operating speed employed is 2920rpm, the sieve hole diameters are 7mm and 5mm while the numbers of hammers are 12 and 18 'pieces. The performance tests show that the mill is capable of crushing between 860 to I l70kg within an hour.
ABSTRACT This investigation derived its strong motivation in the adoption of versions of second-order Runge-Kutta methods whery there is presently dearth of relevant literature to re-establish the complicated nature of solution of buffing oscillator dynamics, The choice of second-order Runge-Kutta methods hinged on its simplest algebraic formulation of relevant coefficients based on Taylor series expansion comparing With its higher order counterpart. Validation of FORTRAN-90 codes of algorith...
ABSTRACT Combustion characteristics of coconut shell (CS) samples in an experimental model bubbling fluidized bed combustor (BFE3C) was investigated with special focus on effect of particle size of the CS. CS waste obtained from farm were crushed and classified into three sizes; Size X (12-50mm). SizeY (2-12mm) and Size Z (c2mm). For overbed feeding of the feedstock, the impact of the particle size on emission and combustion performance were examined. in a 150m diameter experimental model BFB...
ABSTRACT Two field experiments were conducted to compare the growth and yield of tomatoes using experimentation and FAO AquaCrop model at the University of Cape Coast Teaching and Research Farm in the Cape Coast Metropolitan Assembly of the Central Region of Ghana. The Randomized Complete Block Design was used with four (4) treatments and four(4) replications for the two experiments. The treatments used for both experiments were T1 – Full irrigation (100 %), T2 – 90 % irrigation, T3 – 8...
ABSTRACT This study examines the manufacturing capabilities of the Nigerian furniture industry. An extensive review of literature was carried on wood; structure, seasoning types, properties and finishing, Also" a review on wood furniture manufacturing processes, In terms of tools. equipments, design, ergonomics, finishing was carried out. Interview, observation, discussion and survey method " were used for data gathering .from some selected furniture workshops in Lagos: An assessment of the f...
ABSTRACT Multi-layered, feed forward . , back-propagation artificial neural networks (ANN) models were developed to predict friction losses in spark-ignition engines. The friction losses were modeled as friction mean effective pressure (fmep) due to: crankshaft, reciprocating parts, valve trains, auxiliary, and pumping systems. The developed models were validated in relation to existing engine friction data and empirical models of Patton et ai. (patton, K.J., Nitsche, R.G. and Heywood lB. [1...