Browsing by Author "Bolarinwa, M."

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Investigation of the bonding characteristics of termite hill clay in Akure, Ondo State, Nigeria for use in foundries
(2018) Bolarinwa, M.
On annual basis, the activities of termites to man’s habitat have been found to be destructive. Interestingly, man still goes in search of these insects day-in-day-out because of their usefulness in making life more convenient. In this work, the bonding characteristics of an active termite hill clay in the as – received state have been investigated. Three (3) different layers of clay: (Outermost layer -TCH 1; middle layer -TCHM 1 and innermost layer -TQH 1) from a termite colony were separately collected from a forest settlement in Akure, Nigeria, prepared and analyzed by means of compressive strength testing using an Instron Universal tester and mineralogical composition characterization using X-ray mini diffractometer. While results of the compressive strength testing showed that TQH 1, the innermost layer withstood the maximum compressive load of 3,370.27612N and absorbed 51.56948J in the process, results from the mineralogical composition characterization revealed that TQH 1 contained Sillimanite which melts around 1,850°C. This work is of paramount importance to the use of locally available materials, and in large quantities in Nigeria at little or no cost. This has implication for the development of foundries and foundry activities in order to meet up with the increasing demands of the foundry.
Materials for medical devices
(University of Cape Town Library, Cape Town, 2019) Saidi, T.; Dare, A. A.; Fasogbon, S. K.; Ewemoje, O.; Anyaeche, O.; Bolarinwa, M.; Adetoyi, O.; Adewole, K.; Lawal, O.; Coker, A.O.
Noise level assessment in selected Nigerian plank industries: Bodija, Olorunsogo and Olunde in Ibadan, Oyo State, Nigeria
(2018) Bolarinwa, M.
The nature of work that is commonly done in sawmills, together with the quantity of woods being worked on generate a lot of noise to the working environments. Noise is hazardous to human health as it can cause increased blood pressure, sleep deprivation and other physiological as well as psychological effects on the workers. The aim of this study was to assess the noise exposure level of sawmill workers to evaluate their safety at work. Three sawmills, all located in Ibadan, Oyo State, South-Western Nigeria were selected for study. Noise level measurements for planning, circular and drilling machines used in the three sawmills were determined using a precision sound pressure tester measurement. The fraction of exposure, and daily personal exposure levels for each of the machines were obtained. Also, questionnaires were administered to obtain subjective responses from the workers on their demographic data, their knowledge about sawmill noise and impact, as well as perception of noise on the workers. SPSS version 20 was used for data entry and analysis. The nature of work that is commonly done in sawmills, together with the quantity of woods being worked on generate a lot of noise to the working environments. Noise is hazardous to human health as it can cause increased blood pressure, sleep deprivation and other physiological as well as psychological effects on the workers. The aim of this study was to assess the noise exposure level of sawmill workers to evaluate their safety at work. Three sawmills, all located in Ibadan, Oyo State, South-Western Nigeria were selected for study. Noise level measurements for planning, circular and drilling machines used in the three sawmills were determined using a precision sound pressure tester measurement. The fraction of exposure, and daily personal exposure levels for each of the machines were obtained. Also, questionnaires were administered to obtain subjective responses from the workers on their demographic data, their knowledge about sawmill noise and impact, as well as perception of noise on the workers. SPSS version 20 was used for data entry and analysis.
Shift duty and cognitive alertness
(Leading Edge Printers and Publisher, Ibadan, 2023) Bolarinwa, M.
Night shift, a typical shift work common to 24-hour production companies is identified with a number of after-effects on health of workers, ranging from physical to psychological. Lack of solutions to these effects could result in cognitive deficiencies for workers and increased downtime for organisations. Therefore, to overcome the problems associated with shift work, especially night shift, there is the need to understudy the cognitive alertness of workers, in relation to shift duty. This chapter discusses the meaning, history, and forms of shift work, compares and classifies shift work types, highlights the merits and demerits of shift work, dwells on cognitive effects, cognition and cognitive ability, as well as factors affecting cognition and methods of testing cognitive ability. It also covers the Wechsler's classification of intelligence, circadian rhythm, night shift and cognition, together with suggested solutions. Lastly, it finally draws conclusions from the areas covered.
Techno-economic evaluation of biogas generation from selected substrates in a teaching and research farm in Ibadan, Oyo State, Nigeria
(2018-06) Bolarinwa, M.
Biogas, a form of renewable energy (biofuel) and whose by-products include methane, carbon-dioxide and other gases, depending on substrate type is producible from various substrates, with varying degrees of yield level and quality. However, the climatic and energy requirements in realising the optimum yield remain uncertain and vary with the environment. Therefore, this work was centred towards determining the substrate(s) that would give the optimum yield of methane and carbon-dioxide, under Nigerian climatic conditions. Two different substrates were collected and processed by means of anaerobic digestion for twenty-one days using a continuous flow digester. The synthesized gases were tested for a period of two days at varying atmospheric temperature, and humidity for methane, carbon-dioxide, energy yields, and other gases for each day, using AZ77535 gas analyzer and a gas detector. Economic analysis of the data obtained was also conducted. The substrates collected were cow-dung and pig-dung from University of Ibadan’s teaching and research farm. While pig dung yielded 59% and 53% of methane with 35% and 39% of carbon-dioxide at 33.7°C, 71% and 26°C, 50.1%; cow dung yielded 52% and 44% of methane with 30% and 33% of carbon-dioxide at 32.6°C, 65% and 27°C, 52%, as well as energy contents 18,266KJ/m3; 17,311KJ/m3 and 16,177KJ/m3; 13,817KJ/m3 for days one and two respectively. Pig dung gave a higher yield of methane and carbon-dioxide than cow dung, regardless of the working atmospheric temperature and humidity. Economic analysis of the biogas yield showed a potential saving of $267.24for the first year of production. This information is useful in setting up biogas processing plants in Nigeria.