ABSTRACT The toll of climate change on the Nigerian agricultural system in recent times has resulted in the decline of agricultural production constituting a threat to food security. There is therefore an urgent need for strategies to reverse the situation and greenhouse farming is contemplated as a possible option. Towards the successful adoption of this strategy, a survey was conducted using Oyo State as a case study to establish the present status of the use of greenhouses in the region. A...
ABSTRACT The moduli of elasticity and rupture and the energy to cause failure under impact load of the oil palm trunk were determined.
Abstract Cowpeas were prepared into flour by wet dehulling, wet milling into paste and drying; wet dehulling, drying and milling; and wet dehulling, wet milling and foam mat drying. Proximate chemical composition and functional properties (water and fat absorption capacities, foaming capacity, foam stability, bulk density, gelation capacity and emulsification capacity) of flours and of paste prepared by wet dehulling, wet milling and no drying, were determined. Akara from fresh paste and pas...
ABSTRACT Direct viscosity measurements are often expensive or unavailable. Therefore, empirical correlations are often used for predicting the viscosity of crude oils. However, several published correlations are either too simplistic or too complex for routine operational use, Many of the common correlations in use were developed using data from other regions of the world, Empirical correlations for predicting the viscosity of light crude oils in the Niger Delta have been presented in this pa...
ABSTRACT This contribution is on the development of a neurofuzzy model that aids in capturing imprecision and uncertainty in the. various road bump parameters. Road bumps are structures built on roads to act as obstructions to vehicles plying these roads. The neurofuzzy methodology is used to check the vehicle speeds to acceptable standards. Particular use is made of neurofuzzy since it is an improvement on the traditional model proposed earlier in the literature. The work is motivated by the...
ABSTRACT A survey was carried out to assess the methods of livestock and poultry wastes management in Swaziland. The survey adopted the use of questionnaires which sought for information on the types of wastes generated, types of litter materials used, methods of wastes collection, predisposal wastes treatment, wastes utilization and possible effects of the wastes on the environment. Additional information was collected through personal communication and focused group discussions during the f...
ABSTRACT The extensive completed research and continuous study of pendulum is due to its scientific and engineering importance. The present study simulate the Poincare solutions of damped, nonlinear and harmonically driven pendulum using FORTRAN90 coded form of the popular fourth and fifth order Runge-Kutta schemes with constant time step. Validation case studies were those reported by Gregory and Jerry (I 99()) for two damping qualities (ql' q2 = 2,4), fixed drive amplitude and frequency (g ...
ABSTRACT Body injuries sustained in sawmill industry as a result of mill site activities in Ondo, Oyo and Osun states in the Western part of Nigeria was investigated. Nigeria Sawmill Industries are essentially distributed between small, medium and large scale in the proportion of 81%: 13%: 6% respectively (RMRDC, 2003). A survey involving the use of questionnaire, participatory approaches, on-the-spot assessments and interviews were used as tools for investigation. A total of 140 injury cases...
Abstract Numerical simulation of thermal behavior of buildings was carried out with the application of Cooling Load Temperature Difference/Cooling Load Factor (CLTD/CLF) to estimate the energy required for cooling/heating of buildings. This was done to facilitate comparison of the energy being generated from a building while varying significant building parameters. Each factor contributing to space heat gain is described mathematically, considering energy balance within the system. The calcu...
ABSTRACT The effect of blank/punch diameter ratio (draw ratio) in deep drawing on earing for different gauges of Al 1200 sheet was studied. Using 60, 62, 64 and 65mm diameter circle blanks and 33mm diameter punch die, fully annealed Al 1200 sheets of gauge thicknesses 0.6 to 2.0mm were subjected to deep drawing on an ErrichsenR cup drawing machine. The results showed that with increase in sheet thickness, the smaller is the draw ratio that would draw the sheet. For 0.6-0.9mm sheet thickness,...
ABSTRACT Chaos is one of the most important behavioural modes exhibited by dynamical systems and refers to the unpredictable, seemingly random, motion of trajectories of a dynamical system. In recent time, non-linear dynamics and chaos have become familiar in the technical vocabulary of most sciences and technology due to the various applications of chaos in these areas. Chaotic systems display chaotic behaviours only for specific range of values of their parameters. It is therefore important...
ABSTRACT This study investigated thickness requirements for field fabricated (large) spherical liquefied natural gas (LNG) pressure vessels using the finite element method. In the FEM modeling, 3-dimenisonal analysis was used to determine thickness requirements at different sections of a 5-m radius spherical vessels based on the allowable stress of the material as given in ASME Section II Part D. Shallow triangular element based on shallow shell formation was employed using area coordinate sy...
ABSTRACT The amazing development in the thermal engineering literature during the last three decades has opened up totally new and challenging research areas. One of them is the determination of surface area of .metallic bodies. Modern advancements in surface area determination (SAD) have enabled the calculation of areas of several complex shapes. More recently, problems .in ragged metallic bodies (RMB) have evolved. , Research into SAD primarily aims at calculating the cost of coating or ele...
ABSTRACT This paper proposes a set sequencing heuristic solution for the travelling saIesman problem (TSP). It attempts to first select, preferably a set of M smallest elements of the TSP matrix and then form a sequence. A computer code of the procedure was developed in Fortran 77 and used to examine its efficiency and relative effectiveness. It was found to be as effective as, but more efficient than the best of the nearest neighbourhood heuristics.
ABSTRACT Aircraft disaster has been in existence since air was conquered by man as a means of transportation. 487.5 million and 874.4 millions of cumulative departures and flight hours respectively have been estimated since 1959. Analysis of aircraft failure based on 5,149 on-board fatalities recorded shows that 13% of total aircraft accident was caused by mechanical faiIure while loss of control was responsible for over 3 1% of onboard fatalities. Aircraft accident is known to be most fatal ...