http://196.220.128.81:8080/xmlui/handle/123456789/199 2026-04-08T10:46:54Z http://196.220.128.81:8080/xmlui/handle/123456789/5725 DEVELOPMENT OF A ROTARY FURNACE FOR COTTAGE FOUNDRIES AKINSIPE, TAIWO ELIZABETH ABSTRACT A 20 kg Rotary Furnace was designed and fabricated for application at the cottage industry level. The capacity which is considerably smaller than the industrial type (100 kg and above) facilitated economic application by the small-scale inventor. The components of the furnace such as the lining and the metallic bought out parts were locally developed and the performance compared very well the imported materials . Although higher capacity imported furnace with imported lining gave higher performance of higher refractoriness and life span. The present prototype still gave satisfactory performance and provides a ready source of relining. 75p.:ill.;30cm. 2004-12-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5724 DEVELOPMENT OF A QUEUEING MODEL FOR EFFECTIVE CREW SIZE IN MAINTENANCE OPERATIONS BULIAMINU, KAREEM ABSTRACT This thesis describes the use of heuristics and cost models based on the queueing theory to determine effective crew size for maintenance operations. The model was applied to mechanical maintenance workshop, Federal University of Technology, Akure, due to the fact that it has characteristics of external maintenance system. A computer software in "QBASIC"was.developed to solve the model. The results obtained from this approach showed that, the use of heuristics generated effective crew size of one (a seven-man crew), while that of maintenance cost model was two, given a difference of 50%. Also by using deterministic cost model 1.5 sees. was used to process the results, while the time used to process the results in stochastic cost model depends on maximum simulation time MCT, but for heuristic it was just 0.5 second. The results revealed the advantage of using heuristic over complex equations of maintenance cost models. Therefore, to achieve higher response rate, the jobshop should operate on two crews. Although, management can decide to operate on one crew (as prescribed by heuristic) if other maintenance strategic decisions are in her favour than any other jobshops in the environment. Finally, the results generated by both deterministic and stochastic cost models showed that both are equally likely to describe the maintenance jobshop under study. 128p.:ill.;32cm. 1998-09-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5577 A SYSTEM MODEL FOR DEVELOPING PLANT BUILDING LAYOUT OF AN INDUSTRIAL PARK IN A DEVELOPING ECONOMY ATOYEBI, ADEYINKA ABIODUN Gross Domestic Income (GDI) of any government must be a great concern to any administration. Generating income and taxes are to be the cheapest source of revenue for any government which can be achieved handsomely via Industrial Park development. This research developed a system model that enables allocation of land space to every proposed industry, consistent allocation with the constraints has produced the highest annual revenue to the investor through land leasing and taxes. Development plan for land allocated space was grouped into two: Plant Building Layout as 70% and Supporting Layouts as 30%. The supporting layouts percentages were recreational centers as 4%; cars and lorry parks as 10%; commercial centers as 5%; and utilities and service stations as 11%. Strategic decisions which are annual revenue from labour force spending pattern; utility and service charges; tax on Industrial Production and Plant Building Area to be leased for industries were formulated as the objective function. The objective function was optimized under Industrial Park constraints which are capital investment, labour force, utility and service levels, available acreage, as well as maximum and minimum plant building area. Data were collected from five industries for the formulation of Linear Programming (LP) model with tractable objective function and the critical twenty-three constraints. The formulated LP model equations were solved through simplex method. A Computer Algorithm was developed for the model and implemented using JAVA programming language. From the results of the analysis, the Maximum Annual Income for the five proposed industries in the park was estimated as ₦14,417,340,953.82 (USD: $34,740,580.61 at a forecast exchange rate of 415) with varied optimum Plant Building Areas. The optimum total land area for the five industries considered was 7.55 acres. The unused land space for future expansion was 292.47 acres. Labour Utilization, Utility and Service Levels were within capacity limits for the Industrial Park. Since the optimized Investment Cost is ₦283,940,000.00 (USD: $684,192.77), hence the result revealed that there is a good savings of ₦316,060,000.00 (USD: $761,590.36), 52.67% from the entire ₦600,000,000.00 (USD: $1,445,783.13) budgeted as investment cost for plant buildings. The balance was proposed for procuring infrastructural facilities. The highest equivalent land space difference in Naira between the optimized area of land and actual site area was ₦2,474,000.00 (USD: $5,961.44) for Lawal Obelawo Plastic Pipe Industry while the minimum equivalent in naira was ₦448,000.00 (USD: $1,079.52) for Abiola Electrical Machinery Company. The result exposed that more revenue can be generated by the investor under land leasing arrangement than permanent acquisition. Comparingly, Initial Capacities for Utility and Service Levels and Optimized Capacities were significant which can be used for future expansion. The Industrial Park highest optimized value for labour utilization was 191 for unskilled labour which gave a reduction value of 209 while the minimum was 22 for manager labour type with a reduction value of 8. From all the results, it is inferred that the statistical evaluations showed that the model developed can maximize profit for all the industries in a park. 2022-11-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5545 DEVELOPMENT OF SOFTWARE FOR SPUR GEAR DESIGN AWE, OLUWASEYI BABATUNDE Due to technology advancement from the Industrial Revolution to the present day, . the need for closer control over the accuracy, creation, modification, analysis, optimization, storing and communication of design information of systems used for transmitting power made available has also progressed. As a result, an interactive userfriendly and menu-driven CAD GEAR '2003 proprietary software is built to assist in the creation, modification, analysis, optimization, and storing of spur gear design information. This low cost software facilitates the design of spur gears, validates users input and eliminates human errors that may result from design process. It generates accurate data used in design process; performs repetitive and routine tasks involved in spur gear design. It also produces precise and efficient 2D (two dimensional) design drawings of the gears and stores the information for use in manufacturing and future design activities. It was observed that this proprietary software has the advantage of low cost over other operating software for spur gear design. The introduction of this software to the society will in no small way increase productivity and the reliability of spur gear design in Nigeria. M.TECH THESIS 2007-02-01T00:00:00Z