ABSTRACT The traditional method, De Saint-Venant theory which was used in the previous analysis of thin-walled structures assumed free warping of all thin-walled structures, which is very rare in engineering. In this research work, Vlasov’s torsion theory which incorporates restraint warping was employed in the analysis of box culvert. The incorporation of restraint warping by Vlasov made the equation for computing angle of twist extremely rigorous as compared to Saint Venant’s equati...
ABSTRACT The corrosion rates of magnetized mild steel coupons in HCl solutions were studied using the weight loss method. The coupons were magnetized with a laboratory electromagnet at 0.38T, 0.57T, 0.76T, 0.95T and 1.51T and immersed in HCl solutions of pH ranging from 2 to 6. Experimental results showed that coupons magnetized at 0.76T, 0.57T and 0.38T exhibited higher corrosion rates than their non-magnetized counterparts at pH values less than 5. At pH 5 and above however, they showed...
ABSTRACT The Mass and Energy Balance requirements for the production of potable water quality starting from sea water are presented. On the basis of economics of the process, a twenty (20) stage flash (MSF) plant analysis is presented for the production of 1,500m3 of potable water from sea water as required. The overall analysis seems attractive. The design of the nine pre treatment units and product storage tank are also presented. The quantitative block diagram as presented shows the m...
ABSTRACT This project is the design of an automated expert system (Auto Doc) for medical diagnosis preferably used in remote areas of the society. This AutoDoc is an intelligent system for diagnosing ailments for different patients and prescribes drugs. It has the tendency to advice patients for further medical checkup if need be. The system is gender and age sensitive and it is developed and implemented using VISUAL BASIC.NET. This project is designed and implemented with a group of inte...
ABSTRACT This thesis presents the findings of the investigation on the effects of some printing variables on the colour yield of reactive dye printed cotton fabric. The main print variables investigated are squeegee strokes, print paste viscosity, paste storage time and superimposed print. The printing pastes, (pastes A, B and C) used in this work were prepared using cassava starch, NaCl, NaOH and Procion reactive dye (Procion M); and were of different viscosities. The printing operation ...
ABSTRACT The effect of electrode types on the solidification cracking susceptibility of austenitic stainless steel weld metal was studied. The work also investigated the effect of electrode types on the strain hardening exponent of austenitic stainless steel welded joints. Manual metal arc welding method was used to produce the joints with the tungsten inert gas (TIG) welding serving as the control. Tensile tests and metallography of the joints were carried out using standard techniqu...
ABSTRACT The study was aimed at developing mathematical models on the hydraulic performance of Sandbags as Checkdam for erosion control. Pilot studies were carried out at two sites. Site ‘A’ was a natural gully at a location in Ezinihitte-Mbaise, Imo State while site ‘B’ was an artificial channel excavated on the slope of Otamiri River at Federal University of Technology, Owerri. Artificial runoff was simulated into site ‘B’ by pumping water from Otamiri River. Sandbags of var...
ABSTRACT The factors that affect the colour yield of an acid dye on nylon fabric were investigated at a constant temperature of 500C, usingC.I. Acid Yellow 23,with citric acid and sodium chloride as auxiliaries. It was observed from the absorbance results that the colour yield of C.I. Acid Yellow 23 improved with increase in time of dyeing, while the absence or increase beyond 1% (acid) and 5% (salt) reduced the colour yield of the acid dye on the nylon fabric. Also, at a constant dyeing ...
ABSTRACT This research work is aimed at the development of computer programs using MATLAB based on the new polynomial shape functions, for analysis of single panel and continuous thin isotropic rectangular plates. Twelve single panel plate types of different boundary conditions namely SSSS, CCCC, CSSS, CSCS, CCSS, CCCS, SSFS, SCFS, CSFS, CCFS, SCFC and CCFC for aspect ratio, s= b/a, were analyzed for pure bending, buckling and free vibration using computer programs developed in this work....
ABSTRACT Appraisal of industrial accidents and their effects on profitability are presented. Two manufacturing companies, The Nigerian Bottling company, Owerri, and the Nigerian Breweries, Aba were selected for the study which covered a period of three business years (2011–2013). Data collection was through administration of questionnaires and personal interviews of some strategic staff of the Companies. The data were analyzed using Mean Percentage Method. The results showed that th...
ABSTRACT The inhibition of corrosion of mild steel by Azadirachta indica leaf extract in acidic environments of HCl and HNO3 from pH1 to pH6 has been investigated using the weight loss technique. The Azadirachta indica leaf extract is the inhibitor and the mild steel used was in the form of coupons. The investigations were carried out at ambient temperature. The optimum concentration of the extract used for the experimentation was obtained by soaking 200g of ground fresh Azadirachta indic...
ABSTRACT This research aimed at empirical investigation of flexural strength of compressed stabilized earth slab. Two sets of 500 x 500 x 150mm compressed stabilized earth slabs were cast. One set was cast with BRC mesh of 5 x 150 x 150mm with strength of 250N/mm2 as reinforcement and the other set was cast without reinforcement. Eight mixture proportions of laterite, river sand and cement were used in this research work and optimum moisture content obtained from compaction test of the mi...
Environmental pollution is a form of land degradation which has contributed immensely to the reduction of available arable lands and could lead to the total annihilation of the ecosystem if not effectively mitigated. Bioremediation technology offers a biological means which provide an eco-friendly and cost-effective approach for soil remediation in contrast to physicochemical methods. This study aims to evaluate the application of wastewaters and air-injection for the treatment of crude oil c...
The prevalence and high rate of soil contamination have contributed immensely to the reduction of arable lands which might lead to the total annihilation of the ecosystem if not mitigated. Bioremediation employs microorganisms that offer a sustainable approach for the remediation of contaminated soils. This study focus on the evaluation of industrial (brewery) and municipal effluents for the treatment of crude oil-contaminated soil. A microcosm containing 1kg of crude oil-contaminated soil wa...
Abstract Automatic Three Phase Changer is considered one the most important element in the power distribution system as it works to reduce the problem during faulty condition time and also protecting high voltage to the consumption voltage. To achieve maximum efficiency of this phase faulty the stability of power consumption on the distribution center has a main role. This thesis aims to design, simulate and develop automated three phase changer by running different place. The system works a...