This study was carried out on 621 schoolboys with age range of 12-17 years in Junior and Senior Secondary Schools in Odeda area of Odeda local government in Ogun State, Nigeria. Different anthropometric data were collected from these boys. It was observed from the results that all anthropometric dimensions of the school children increase with their age. Moreover, there exists a little difference between mean values of different anthropometric dimensions between the boys of 12-13 years (2.9% to 8.8%), 14-15 years (1.3% to 9.9%), and 16-17 years (1.4% to 5.5%). But the said differences become much higher (16.2% to 42.4%) when the same were compared between the children of 12 years and 17 years. Therefore, it can be said that the design of furniture for the children of 12 years will not match the children of 17 years. If single furniture is designed by considering dimensions of the children from 12 years to 17years, it will also not suit the children of all age groups. Therefore, in the present investigation, all the students have been divided into three combined age groups, e.g., 12-13 years, 14-15 years, and 16-17 years, and the percentile values (5 th , 50 th and 95 th) of anthropometric measures, which will be helpful for designing of the classroom furniture.

This study is to determine whether design improvement and further study is required to improve the conditions in Nigeria tertiary institutions. The supplied standard government issued furniture was measured and anthropometrics measurements data were collected from 720 students of three randomly selected tertiary institutions in Abeokuta, Ogun State, Nigeria, covering the age group of between 17 and 27 years. The data collected indicates a substantial degree of mismatch between the student anthropometric dimensions and the furniture they used. The chair is either too high or too deep for the students. The data also reveals that the desk is too high for most of the students. The variability between gender and age has profound impact on the mismatch level. The result is of great concern which could affect students in other institutions throughout Nigeria. Further investigations are suggested in order to provide better understanding of the problem and improve it.

Nigeria automobile service industry is labour intensive with high level of work-related injuries among its workforce. This research assessed work-space (WsD) and work-method designs (WmD), level of compliance with recommended standards (RSs) and effects on workers' wellbeing. Clearances for services in 55 supine positions and 45 stand-up workbenches' (SUWb) heights were measured and compared with RSs. Questionnaires were completed among 252 workers to measure prevalence of work-related injuries. Descriptive statistical procedure and Chi-Square tests were conducted using SPSS. 94.4% of workers suffered from low back, 43.5% neck and 40% knees pains among others. Averagely, 43.33±7.3cm and 67±0.15cm were measured for supine position clearance and SUWb heights with 15.03±14.3 and 26.55±16.23 percentage deviations respectively from the minimum RSs. Automotive mechanics may be prone to back, hand and/or wrist related problems and Cumulative Trauma Disorders. Ergonomics trainings, use of mechanical devices and protective equipment will reduce injuries connected with the job.

Abstract:The objective of this study is to undertake an Ergonomic Scrutiny of Desecrate Management Industry. Ten (10) employees of the parking and collection department of Kim Waste Management Authority (KWMA) were selected. Their activities were video and recorded while working and their different postures were analyzed using Rapid Entire Body Assessment (REBA) and Rapid Upper Limb Assessment (RULA). Result showed that 10 % were at medium risk; 40 % were at high risk and 50 % were at very high risk for the workers in KWMA. It as discovered that workers are subjected to Musculoskeletal Disorder (MSDs) as a result of the postures adopted during the work process.

This study was a comparative study on the effect of the flux produced from coconut and eggshell powders during arc-welding of mild steel. An arc welding machine and flux prepared from agrowastes were employed for the study. The Flux compositions used for the 5 welded groups include 100% Eggshell, 100% Coconut shell, 70% Eggshell with 30% Coconut shell, 30% Eggshell with 70% Coconut shell and finally, normal convectional flux for control experimentation. Tensile test shows that the 100% egg shell powder as flux had the highest tensile strength with 850 N at maximum tensile compare with 70% Egg shell, normal flux, 30% Coconut shell and 100% Coconut shell that returned values of 847, 785, 750 and 712 N respectively. Samples welded using 100% Eggshell developed flux produced the highest Brinell Hardness Value of 125.25 BHN at the welded joint compared to results from other flux types. Tensile results shows that welded joints formed by 100% Eggshell flux had the highest Maximum Tensile Stress (MTS) of 850.2 N compared with others having lower values of MTS and can last longer when load bearing properties is considered. Hence, flux developed from 100% Eggshell is recommended for use as substitute for the conventional flux.