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Lagos, Nigeria

Agunsoye J.O.,University of Lagos | Bello S.A.,Kwara State University | Talabi I.S.,University Of Ilorin | Yekinni A.A.,Lagos State Polytechnic | And 3 more authors.
Tribology in Industry

Aluminium based metal matrix composites have been produced from recycled aluminium cans and 150μm sized eggshell particles using a stir cast process. The mechanical properties of the control and aluminium can/eggshell composites produced have been investigated. The microstructures of the aluminium can/eggshell composites were examined with the aids of Scanning Electron Microscope (SEM) after the sample surfaces have been carefully prepared and etched with aqueous solution of 0.5 cm3 nitric acid. Micrographs revealed that there was a homogenous distribution of eggshell particles within the aluminium can matrix. An indication of effective stirring action during the melting process. The wear resistance was also investigated under different applied loads (6 to 14 N) on an abrasive surface emery paper of grade 220. The results revealed an increase in Young’s modulus of elasticity and yield stress from 1,206.45 and 50.23 Mpa respectively of the cast aluminium can with 0% eggshell particle to the maximum of 3,258.87and 73.2 MPa of aluminium can/12% eggshell composites. The hardness values increased from 66.23 to 75.13 VN. There was a gradual increase in wear rate of the tested samples as the applied load increased. However, the wear resistance of the aluminium can/6% eggshell and aluminium can/12% eggshell composites increased significantly. Hence, recycling of aluminium cans and eggshells can be harnessed into development of useful engineering metal matrix composite materials. © 2015 Published by Faculty of Engineering. Source

Asafa A.R.,Lagos State Polytechnic | Ologhobo A.D.,University of Ibadan | Adejumo I.O.,Landmark University
International Journal of Poultry Science

The study investigated the effect of crayfish waste meal on the performance characteristics and nutrient retention in broiler finisher. 150 one day old chicks were used for the study which lasted for 9 weeks. The result of the study showed that the average dry matter intake ranged from 1918.96 g in broiler chicken fed diet IV (25%FM:75%CWM) to 2141.60g in diet V (100% CWM) chickens. There was no significant differences (p>0.05) between treatment means. Birds fed the control diet (100%FM) recorded the highest gain (787.30 g) followed by those fed diet III (50%FM; 50%CWM) while the least gain (679.00 g) was by diet V (100%CWM) chickens. No significant (p>0.05) difference was observed between the treatment means. The feed conversion ratio was best (2.48) with chickens fed the control diet (100%FM) and progressively decreased with diet V (100%CWM) chickens recording the least (3.19). There was, however, no significant (p>0.05) difference between treatment means. Protein efficiency ratio followed similar trend with the feed conversion ratio. Diet I (100%FM) chickens had the highest value (2.09) followed by diet II (25%FM; 75%CWM) while those fed diet V (100%CWM) was the least (1.64). © Asian Network for Scientific Information, 2012. Source

Dekolo S.O.,Lagos State Polytechnic | Oduwaye A.O.,University of Lagos
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives

Lagos has assumed the Megacity status and it is projected to have its population doubled in the first quarter of this century. The Megacity has extended beyond the administrative boundary of the state, which is also one of the fastest growing urban agglomerations in the world. Information is the most vital component of urban management; however, a survey of the spatial data infrastructure of the city proves it derisory or out-of-date, thereby creating a void between urban development and its management. This has led to a sporadic growth of slums and unplanned settlements which now accounts for over 60% of the city. To avoid an impasse, it is necessary to review the level of geospatial technologies used at the local level and recommend formidable means of integration in the decision making process. This paper examines the level of geospatial technologies the 20 local governments of Lagos State and within the Megacity region and suggests success factors. Source

Olufemi B.A.,University of Lagos | Omotayo M.T.,University of Lagos | Olawuwo O.O.,University of Lagos | Sese O.E.,University of Lagos | Odunlami M.O.,Lagos State Polytechnic
Proceedings of the 2012 IEEE 4th International Conference on Adaptive Science and Technology, ICAST 2012

An experimental study was performed using an array of solar panels to power three non-asbestos diaphragm type electrochemical cells whose anodes consisted of carbon rods and cathodes made up of stainless steel plate for the electrolysis of a 25% w/w sodium chloride solution, with the aim of producing caustic soda. The non-asbestos diaphragms served to hinder the formation of unwanted substances as well as permit reasonable production of the desired products. Quantitative analysis showed that the quantity and concentration of caustic soda produced varied with the current and voltage obtained from the solar panels which were dependent upon the intensity of the sun on any particular day and the length of time the panels were exposed to sunlight. The three non-asbestos diaphragm cells exhibited various characteristic performances, which are reflections of their design, fabrication, composition and operational parameters. The non-asbestos diaphragm D3 with composition of 60 % w/w Portland cement, 20 % w/w silica and 20 % w/w polyvinyl chloride (PVC) indicated the highest yield of caustic soda per d.c Watt with specific electrical energy supplied. The research served as an encouraging inquisitive foundation into the possibility of producing caustic soda directly from solar powered electrolytic diaphragm cells as well as investigating key factors that affects cell performance in view of present conventional modes of electrochemical production. © 2012 IEEE. Source

Bolarinwa J.B.,Lagos State Polytechnic
International Journal of Agricultural Research

The study discussed the importance of fish as a food commodity and the rich, ichthyofauna resources of Nigerian territorial waters which has not been optimally utilized to be sustainable. Among the challenges facing the fisheries subsector of Nigerian economy apart from overfishing, poor post-harvest technology and high incidence of sea piracy is poor level of communications, public relations and restricted access to extension services especially to the rural artisanal fisherfolks/fishfarmers in Nigeria. This has been identified as contributory to the increasing shortfall between demand and supply of fish in Nigeria. There is a need for a good public image of big fisheries concerns. Production and marketing personnel need to respect the wishes of the consumers and have good interpersonal relationships. Communication should be a 2-way affair between the extension officers and the fisher folks in the rural communities for goals to be achieved. The various media that could aid better dissemination in the Fisheries subsector were highlighted. The author recommended better funding, training of extensionists and target audience, improved public sensitization of rural practitioners to increase fish output. There is a need for a more productive and result-oriented reform in Nigerian extension system. A unified extension method is also recommended for effective extension education from the stage of production, handling, processing, transport and retailing. A more conducive enabling environment should be created by the government. © 2015 Academic Journals Inc. Source

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