Browsing by Author "Oyawale, F. A."

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An algorithm for job scheduling in 2 - machine flow shop problem
(2009) Odior, A. O.; Oyawale, F. A.
This paper considers the problem of scheduling in flow-shop by Johnson's Algorithm method and Genetic Algorithm method to find an optimal sequence for n jobs machine problem based on minimum elapsed time. In scheduling the two machine flow shop problem F2||∑C1, one has to determine a schedule that minimizes the sum of finishing times of an arbitrary number of jobs that need to be executed on two machines, such that each job must complete processing on machine 1 before starting on machine 2. We propose a heuristic for approximating the solution for the F2||∑C1 problem using a genetic algorithm.
Application of a neurofuzzy mathematical model in the development of a local oven design
(Tapas Institute of Scientific Research and Development, 2009-12) Odior, A. O.; Oyawale, F. A.; Charles-Owaba, O. E.
This paper presents a contribution on the development of a neurofuzzy mathematical model that aids in capturing and analyzing the various parameters in oven design. The oven was designed specifically for domestic and commercial baking operations. The neurofuzzy methodology was used to regulate the oven baking temperatures to acceptable standards. Particular use was made of neurofuzzy model since it is an improvement on the process design. The work was motivated by the need for a more reliable and easily understandable methodology that guides decision makers in making correct decisions in a timely manner. The results obtained demonstrated that it is feasible to apply the model in practice.
Application of fuzzy logic concept to profitability quantification in plastic recycling
(2006) Oke, S. A.; Johnson, A. O.; Popoola, I. O.; Charles-Owaba, O. E.; Oyawale, F. A.
This paper aims at applying a fuzzy logic control model to profitability in a case study of the plastic recycling industry in Nigeria. The studies of profitability components of the plastic recycling industry as used to develop a model framework and the application of fuzzy logic control model to the framework are given in this paper. A brief introduction to profitability concepts as well as useful suggestions and conclusions are all integral part of this paper which is based on the application of a fuzzy logic model of control to profitability concept in plastic recycling industry.
Application of hybrid structural interaction matrix to quality management
(Inderscience Enterprise Limited, 2008) Oke, S. A.; Ayomoh, M. K. O.; Akanbi, O. G.; Oyawale, F. A.
This paper applies the concept of Hybrid Structural Interaction Matrix (HSIM) to the management of quality in a manufacturing organisation. The application is motivated by the need to evolve alternative prioritisation tools in quality management. A process, which could be used to analyse a specific situation, was presented by showing how Structural Interaction Matrix (SIM) and Hierarchical Tree Structure Diagram (HTSD) could be used to create a model. The result indicates the feasibility of applying the model in a specific situation in some useful insight into the problem solution. This research has serious implications for management in manufacturing organisation in that it saves tremendous energy and cost that could be expended on alternative prioririsation techniques due to minimization of time expended in seeking expert of opinion on the issue. This paper is new in that it shows a new dimension about thinking on quality management.
Application of job scheduling in small scale rice milling firm
(Asian Reserch Publishing Network(ARPN), 2010-01) Odior, A. O.; Charles-Owaba, O. E.; Oyawale, F. A.
Rice is the edible seed of a plant which is a member of the grass family. It is an annual plant which is grown in many countries throughout the world and is the staple diet for over half the world's population. Rice milling firm has therefore occupied a significant position in the small,medium and large scale enterprises of many nations. In application of job scheduling in rice milling activities a framework for proper scheduling of activities (jobs) in rice milling processing firm in Nigeria has been developed. The methodology addresses this problem by supposing we have (n) customers to be served (where n is large); in what way should customers' order be processed such that the firm's profit is maximized while the customers are not unnecessarily delayed? The problem is addressed by using makespan as a measure of performance while the job orders were sequentially scheduled according to order of priority to achieve optimum results. The results show that CDS and A1 heuristics are preferred to the traditional method or USO. Accordingly, the CDS heuristic followed by A1 heuristic gives the best makespan result.
Application of mathematical model to job scheduling in an oil processing firm in Nigeria
(Science Hub, 2010) Odior, A. O.; Oyawale, F. A.
The job scheduling mathematical model was applied to small scale oil winning processing in this paper with a view to develop a framework for the proper scheduling of jobs (orders) in oil winning processing firm in Nigeria. The problem is addressed by supposing we have (n) customers to be served (where n is large) in what way should customers' older be processed such that the firm's profit is maximized while the customers are not unnecessarily delayed? The paper addressed the problem by using makespan as a measure of performance while the job orders were sequentially scheduled according to order of priority to achieve optimum results. The mean makespan for the CDS heuristic is 35.99, for Al is 36.08 while for the usual traditional serial order (USO) method is 40.91. The average gain with the application of CDS heuristic is 4.962 and for AI is 4.912.The results show that CDS and A1 heuristics are preferred to the usual method of USO. Accordingly, the CDS heuristic followed by A1 heuristic, gives the best makes pan results
Application of mathematical model to optimization of the production capacity of paint manufacturing company
(Spring, 2008) Odior, A. O.; Oyawale, F. A.
This paper presents a case study in the development and application of a mathematical model to optimize the production capacity of a paint manufacturing company. The organization specializes in the production of different grades of paint and paint containers. The paint production activities include; weighing of raw materials, drying of raw materials, dissolving of raw materials, materials filtering, material string, product inspection and quality control and product packaging.The processes in paint container production comprise of cutting of sheet metal, sheet metal rolling, sheet metal pressing for overlapping hook, cutting of top cover, cutting of bottom cover, coiling of sheet metal to shape, and pressing bottom cover to position. The study reveals that the time it takes to produce a unit product is directly proportional to the number of production stages Involved and the time spent at each of these production stages.This time is being represented by some structural equations which are characteristics of the system being studied.
Application of mathematical model to the production capacity of a yam flour producing company
(RIP Research India Publication, 2009) Odior, A. O.; Oyawale, F. A.; Orsarh, E. S.
Yam flour is usually required for the preparation of pounded yam which is a daily nutritional food requirement for most Africans. It facilitates the preparation of pounded yam for both domestic and commercial consumption. The production process and the basic operations involved in the production of pounded yam flour have been investigated in other to estimate the production capacity of the company studied. A time study model was developed and applied to analyze the various basic operations involved in the production of pounded yam flour.These basic operations include; the selection of yam, weighing of yam, washing of yam, peeling of yam, slicing of yam with a slicing machine, parboiling of sliced yam with a parboiler, drying of parboiled yam with a dryer, milling of dried yam into yam flour with a hammer mill, packaging of the yam flour and sealing of the packages with a sealing machine. In this paper therefore, a mathematical model was developed with the application of different techniques of differential calculus to the component elements of the production process of yam flour. The study reveals that the time it takes to produce some kilogram unit of pounded yam flour is directly proportional to the number of production stages involved and the time spent at each of these production stages. This time is being represented by some structural equations which are characteristics of the system being studied
Application of neuro- fuzzy to component elements of a grinding wheel
(RIP Research India Publication, 2008) Odior, A. O.; Oyawale, F. A.
The grinding wheel is made of very small sharp and hard silicon carbide abrasive particles or grits held together by strong porous bond. These silicon carbide abrasive particles are hard crystalline materials which are held together by the strong, porous bond and these abrasive materials which are of extreme hardness are used to shape other materials by a grinding or abrading action. The paper presents, an analysis of the various component elements of a typical grinding wheel using neuro- fuzzy technique. Among these component elements we have, the size of the grains and its spacing, volumetric proportion of grains, volumetric proportion of bonding material and volumetric proportion of pores. However, the work is new as it appears to be the first application of neuro- fuzzy to component elements of a grinding wheel.
Application of neuro-fuzzy models to grinding wheel parameters
(Research India Publications, 2010) Odior, A. O.; Oyawale, F. A.
Grinding is one of the most important finishing operations and it is very useful in our automobile industries. A grinding wheel is made of very small, sharp and hard abrasive particles or grits held together by strong porous bond. The paper presents, a control system for grinding process using neuro-fuzzy technique. The grinding parameters include circumferential speed of a grinding segment workpiece velocity and work depth of cut. The maximum grinding temperature is very important since too high temperature will lead to surface burns and thermal damage to the grinding wheel as well as the workpiece material. For fuzzy modeling, all the numerical values are replaced with linguistic values. The research work can be applied to any other grinding process, whether it is a wet or dry grinding process.
Application of time study model in a rice milling firm: a case study
(RIP Research India Publication, 2010) Odior, A. O.; Charles-Owaba, O. E.; Oyawale, F. A.
This paper presents a case study in the development and application of a time study model in a rice milling firm. Rice milling is a process whereby the rice grain is transformed into a form suitable for human consumption and it has to be done with utmost care to prevent breakage of the kernel and improve the recovery. Rice is a very important nutritional diet for over half the world's population and as a result rice milling firm has occupied a significant position in small, medium and large scale enterprises of many nations. The study reveals that the time it takes to mill a 50 kilograms bag of rice is directly proportional to the number of production stages involved and the time spent at each of these production stages. This time is being represented by some structural equations which are characteristics of the rice milling firm being studied
An approach for solving Iinear fractional programming problems
(An approach for solving Iinear fractional programming problems, 2009-05) Odior, A. O.; Oyawale, F. A.
Linear fractional programming problems are useful tools in production planning, financial and corporate planning, health care and hospital planning and as such have attracted considerable research interest. The paper presents a new approach for solving a fractional linear programming problem in which the objective function is a linear fractional function, while the constraint functions are in the form of linear inequalities. The approach adopted is based mainly upon solving the problem algebraically using the concept of duality and partial fractions and an example is given to clarify the developed method.
An assignment problem for n machines and m operators
(Nigerian Assocation of Mathematical Physics, 2010-11) Odior, A. O.; Oyawale, F. A.
The assignment problem is a special type of linear programming problem which is concerned with allocating in operators (men) to n machines (tasks) given that each operator is qualified for certain of the tasks. The output from each task is given as a function of the number of qualified men assigned to it. The assignment model is to be solved by conventional linear programming approach or transportation model approach. It is a square matrix, having equal number of rows and columns. It enables the assignment of men to task and the objective is to assign one man from row to one task from column so as to maximize total output and minimize the total cost.
Biogas production from organic waste
(2009) Oyawale, F. A.; Orimogunje
Waste management is a very big challenge in Nigeria today. With increased poultry farming and animal husbandry, a lot of droppings is generated which is presently constituting a nuisance in many neighbourhoods. One simple, effective and low cost method of management which has not been optimally utilized is the anaerobic digestion. The main objective of this project is to design and fabricate a simple low cost and acceptable household biogas plant which can serve as waste management device and also as a source of energy for cooking. A 100 litre galvanized plate biodigester was designed, fabricated and used to obtain biogas from these waste. The digester was charged with cow dung slurry, which had the composition: potassium (1.47), phosphorus (4.60), Nitrogen (3.19) and Organic Carbon (68.6). To 300 litres of the feed (dung), an equal volume of water was added and made into 600 litres slurry. An average of 0.3151m3 of methane gas was generated daily- a quantity of gas capable of sustaining cooking for 2.6403 hrs. On the 44th day from the day the first charging began the process attained stable steady-state with 15 litres of slurry fed into the digester daily and an equal volume of spent sludge discharged. On the average, the gas generated was enough to provide an average of 1hr. 36mins cooking daily.
The combined application of quality function deployment and pareto analysis for hotel services improvement
(Inderscience Enterprise Limited, 2008) Oke, S. A.; Ofiabulu, C. E.; Banjo, A. A.; Akanbi, O. G.; Oyawale, F. A.
This paper discusses the combined application of Quality Function Deployment (QFD) and Pareto Analysis (PA) to hotel services. This paper improves the current quality management practices in a case study hotel. This results into increased customer patronage and improved hotel profit margin. PA is applied as a prioritisation tool for the purpose of financial investment decision. The study may be applicable to other hotels. It could also significantly affect the goodwill of the organisation as well as its profit margin. This paper is new, in that it appears to be the first application of Pareto cum QFD principles in hotel services, and a new way of prioritisation and quality improvement in hotels systems
Cost analysis in the implementation of ISO quality system in a petroleum refinery
(Inderscience Enterprise Limited, 2009) Oke, S. A.; Abudu, A. J.; Akanbi, O. G.; Oyawale, F. A.
The substantial amounts of financial and non-financial resources invested annually on petroleum refinery operations justify the need for documentation on the cost of implementing ISO quality systems ill refineries. The experience of ISO quality system implementation cost analysis in a petroleum refinery in a developing country is reported with a combination of mathematical model and application. The concept of strain as a function of growth in the physical sciences is adopted to conceptualise the growth phenomenon in the ISO organisation. Practically, developing a quantitative approach in evaluating cost of ISO implementation would help the manager in relying on scientific fact instead or intuition. The approach is new and has the potential for helping the top management in planning the strategy and allocating necessary funds for effective implementation of ISO quality systems.
Design and fabrication of a cassava peeling machine
(Nigerian Institute of Food Science and Technology, 2005) Akintunde, B. O.; Oyawale, F. A.; Tunde-Akintunde, T. Y.
The varying shapes and sizes of cassava tubers have made cassava peeling to be one of the major problems in the mechanization of cassava processing. A cassava peeling machine was designed and constructed. The design parameters include a power requirement of 0.36hp belt tensions of 349.7 and 1807.5N and shaft diameter of 35mm. Its main component is a peeling chamber, which consists of two perforated drums rotating in the opposite direction. The machine had an average capacity of 44.50kg/hr, an average peeling efficiency of 83% and all average percent flesh loss of 5.38%.
Design and fabrication of a vacuum cobweb cleaner
(Blackwell Educational Books, 2009) Oyawale, F. A.; Otesile, O. O.
A visit to high rise buildings will show infestations with cobwebs at the walls and ceilings. These buildings could not be cleaned except through the use of scaffolds and long poles with wet cloth or foam rubber attached to the end. The aim of this research is to design a device to do such cleaning efficiently without the inherent dangers in the use of scaffolding. The design of the vacuum cobweb cleaner was based on parameters used in the design of components such as the vacuum cleaner, floor polishers, and floor scrubbers. After the engineering drawing, materials were selected to strike a balance between the cost and quality. The fabrication of the vacuum cobweb cleaner was mainly through the use of basic manufacturing processes such as cutting, joining, machining and drilling. The performance of the vacuum cobweb cleaner was satisfactory. There is need however to improve the suction of sticky webs.
Design and fabrication of a water distiller
(Scholarlink Research Institute, 2010) Oyawale, F. A.; Odior, A. O.; Ismaila, M. M.
The objective of this project is to design and fabricate a low cost water distiller capable of producing water that is pure in all ramifications for domestic and commercial consumers. The critical components of the distiller are made of stainless steel. These parts include the tank, the lid/condenser and the distilled water collector. Selection of material used is based on both their physical and chemical properties. The tank has a square base and the opening end of the tank is slanted. This will make the condensate to trickle downward for collection at the end of the lid. The lid is continuously cooled by water at room temperature that runs from a tap. The distiller is able to produce 29.4 x 10-3 litres (29.4 ml) of distilled water in 10 minutes. Once the water is boiled, the heater can be switched off and continuous cooling of the condenser/lid could last 30 minutes. The volume of water produced is approximately 105.3ml. Distillation continues until the temperature drops to room temperature i.e. 25°C by which time, the volume of distilled water will drop since the production of steam will decrease due to the drop in temperature of water in the tank. The water distiller is designed and fabricated from locally sourced materials and this makes it cheap and affordable to the common man in our society.
Design and manufacture of manual electrode coating machine for small-scale arc welding electrode manufacture
(2005) Oyawale, F. A.; Ibhadode, A. O. A.
Local production of electrodes in Nigeria has always been by major manufacturers. The technical partners have maintained that there are no suitable substitutes for the raw materials locally in an attempt to continue to import from their home countries. Our effort at local sourcing required experimentation, which could not be carried out without a means of applying the coating to the wire. This was effected through a direct extruder, which was fabricated to coat electrodes under manual pressure built up through a plunger in an extrusion chamber. Once a wire was coated, the plunger was withdrawn to remove the pressure. The electrode-coating machine is expected to find application in research laboratories of tertiary institutions and small scale manufacturing outfits.