Journal Articles http://repository.fuoye.edu.ng:80/handle/123456789/71 2026-04-16T13:34:16Z 2026-04-16T13:34:16Z • Owa, A.F, Kareem, B and Adesina• Owa, A.F, Kareem, B and Adesina http://repository.fuoye.edu.ng:80/handle/123456789/1041 2015-09-22T13:36:15Z 2015-09-22T00:00:00Z

Title: A Model For Determining the Influence of Irregular Power Supply on Production Industry in Developing Economy Authors: • Owa, A.F, Kareem, B and Adesina• Owa, A.F, Kareem, B and Adesina Abstract: In this paper, profit is maximized ( or production cost is minimized ) by developing an Integer programming ( IP ) model to determine, at a given respective unit cost, optimal numbers of outputs obtainable per production cycle (time) using public electricity generated from national grids and alternate electricity from generators subject to production output capacity or demand constraint. The results obtained showed that production cycle time has a great impact in the determination of optimal outputs for the respective conditions. Also increase in cost of public electricity per unit product has an upper limit beyond which it has negative effect on the profitability. The results served as determinant factors for production industry in establishing the level of outputs that sustained the profitability by providing optimal cost of public electricity to operate without having any effect on the profit, at a given cycle time.

2015-09-22T00:00:00Z Kolawole, Funsho Olaitan Adeniji, Sharafadeen Adetunji Idowu, Adeyinka Taiwo Owoseni, Tunji Adetayo Ngasoh, Odet Fayen Soboyejo, Wilson Oluwole http://repository.fuoye.edu.ng:80/handle/123456789/1022 2015-09-22T12:56:54Z 2014-03-01T00:00:00Z

Title: Corrugated Laterite Based Ceramic Roof Tile Stabilized with Cement Authors: Kolawole, Funsho Olaitan; Adeniji, Sharafadeen Adetunji; Idowu, Adeyinka Taiwo; Owoseni, Tunji Adetayo; Ngasoh, Odet Fayen; Soboyejo, Wilson Oluwole Abstract: The use of laterite based material as ceramic roof tile contributes to the innovation and application of local materials within our immediate environment. In this study the aim is to design and produce corrugated laterite based roof tile and investigate its water absorption and penetration. Paste of laterite-cement mix was formed with water to cement ratio of 3:1. The percentage composition of the cement used was 15% and 20%. The paste was poured into a wooden frame (dimension of 200mm x 300mm x 20mm) with an underlying corrugated metal sheet, while another corrugated metal sheet was placed on the paste to ensure formation of the corrugated shape on both sides. Water analysis carried out on the cast samples showed that the sample with 20% cement composition had a better resistance to water absorption and penetration. The result of this study indicates that the formation of corrugated roofing tile using laterite material is feasible and it is possible to have good water resistant property if fully optimized.

2014-03-01T00:00:00Z Kolawole, Funsho Olaitan Mohammed, Ramalan Aliyu http://repository.fuoye.edu.ng:80/handle/123456789/1005 2015-09-22T12:35:44Z 2013-09-01T00:00:00Z

Title: The Effect of Silicon Particulate on the Mechanical Properties and Microstructure of Aluminium Based Bearing Material (Al-6%Sn-0.35-1.40%Si) Authors: Kolawole, Funsho Olaitan; Mohammed, Ramalan Aliyu Abstract: The effect of different percentage of silicon on the ultimate tensile strength, energy absorbed, hardness and microstructure of aluminium bearing alloy was studied. Pure silicon powder was added to the aluminium bearing alloy (Al – 6%Sn) during casting to obtain different percentages of 0.35, 0.70, 1.05 & 1.40 of silicon for each of the composition. Samples were machined from the aluminium bearing alloy of composition (wt %); Al – 6%Sn (Control), Al – 6%Sn – 0.35%Si, Al – 6%Sn – 0.70%Si, Al – 6%Sn – 1.05%Si, Al – 6%Sn – 1.40%Si. From each composition of the aluminium bearing alloy five samples were machined and subjected to tensile test, impact test and hardness test. All the samples of the aluminium bearing alloy were taken and subjected to thorough metallographic samples preparation processes. The results obtained in this investigation shows that the aluminium bearing alloy with 0.35% Si gave a slight improvement in the ultimate tensile strength, energy absorbed and hardness value, the sample with 0.70% Si gave a great improvement in the ultimate tensile strength, energy absorbed and hardness value, 1.05% Si gave a greater improvement in the ultimate tensile strength, energy absorbed and hardness value, while 1.40% Si gave the highest ultimate tensile strength, absorbed and hardness value. In this work particulate method was used to hardening and strengthening the bearing material.

2013-09-01T00:00:00Z O. R. Bodede, P. O. Ojo, O. R. Ayodele, A. F. Owa and O. B. Ajayi http://repository.fuoye.edu.ng:80/handle/123456789/987 2015-09-22T12:07:57Z 2011-01-01T00:00:00Z

Title: Evaluation of As-Quenched Hardness of 1.2% Carbon Steels in Different Quenching Media Authors: O. R. Bodede, P. O. Ojo, O. R. Ayodele, A. F. Owa and O. B. Ajayi Abstract: The As-quenched hardness behaviour of 1.2% carbon steels in different quenching media was investigated. The hardness values were studied on two grades of high carbon steel materials, namely 1.2% carbon and low-alloy 1.2% carbon steels respectively. Specimens were prepared and given both spheroidizing and normalizing heat treatments before they were hardened. Hardening was done at both 800oC and 850oC and quenching was carried out in water, cold water, brine, cold brine and SAE engine oil. Then hardness measurements were carried out on the specimens in the pre-hardening and as-quenched conditions, results obtained showed that in the as-quenched condition, oil quenching resulted in partial hardening in both steels; the addition of 1.2% tungsten to the 1.2% carbon steel was not sufficient to cause full hardening. Full hardening was only attained when quenched in water or brine. Cold brine quenching produced maximum as-quenched hardness values in both steels; in conclusion, higher as-quenched hardness values were obtained for the case of normalized prehardening structure than the other case of spheroidized pre-hardening structure when quenched from 800oC, it is the reverse when they were quenched from 850oC. The two steels did not attain full hardening when quenched from 800oC or 850oC in SAE engine oil. Quenching in more severe media such as water and brine was found to result in adequate hardening, where hardness values of over 600VHN were obtained.

2011-01-01T00:00:00Z Moo-Yeon Lee http://repository.fuoye.edu.ng:80/handle/123456789/150 2016-01-15T13:30:09Z 2012-01-01T00:00:00Z

Title: Numerical Model on Frost Height of Round Plate Fin Used for Outdoor Heat Exchanger of Mobile Electric Heat Pumps Authors: Moo-Yeon Lee Abstract: The objective of this study is to provide the numerical model for prediction of the frost growth of the round plate fin for the purpose of using as a round plate fin- tube heat exchanger (evaporator) under frosting conditions. In this study, numerical model was considering the frost density change with time, and it showed better agreement with experimental data of Sahin (1994) than that of the Kim model (2004) and the Jonse and Parker model (1975). This is because the prediction on the frost height with time was improved by using the frost thermal conductivity reflecting the void fraction and density of ice crystal with frost growth. Therefore, the developed numerical model could be used for frosting performance prediction of the round plate fin-tube heat exchanger. Description: The objective of this study is to provide the numerical model for prediction of the frost growth of the round plate fin for the purpose of using as a round plate fin- tube heat exchanger (evaporator) under frosting conditions. In this study, numerical model was considering the frost density change with time, and it showed better agreement with experimental data of Sahin (1994) than that of the Kim model (2004) and the Jonse and Parker model (1975). This is because the prediction on the frost height with time was improved by using the frost thermal conductivity reflecting the void fraction and density of ice crystal with frost growth. Therefore, the developed numerical model could be used for frosting performance prediction of the round plate fin-tube heat exchanger.

2012-01-01T00:00:00Z