Department of Mathematical Sciences

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https://repository.run.edu.ng/handle/123456789/73

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    Assessing the Impact of ATM and POS Transactions on Currency Circulation in Nigeria: a comparison of artificial neural network and linear regression models
    (Revue d'Intelligence Artificielle, 2024-02) Adesina, Olumide Sunday
    This work is aimed at assessing the impact of ATM and POS transactions on currency in circulation in Nigeria via the comparison of the Artificial Neural Network and Linear Regression models. The Pearson product moment correlation coefficient was used to assess the degree of relationship between currency in circulation and ATM transactions, currency in circulation and POS transactions, ATM transactions and POS transactions. In addition to this, a multiple linear regression model was also fitted on the data to in order to assess the impact of currency in circulation on ATM transactions and POS transactions. From the results obtained, it was observed that POS transactions have a significant impact on the amount of currency in circulation compared to ATM transactions because the value of POS transactions has a P-value of 1.5542E-13 which is significant at 0.05. This was further studied using the Artificial Neural Network (ANN). The Multilayer preceptor of ANN was adopted, with 70 percent of the data initially subjected to training and 30 percent for validity. Thereafter, the amount of training data was increased to 61.4% and testing data was increased to 38.6% and it was observed that there was corresponding increase in the R-square from 0.809 to 0.839. This shows that the R-square of the ANN can be improved by increasing the amount of training data and testing data.
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    Unsupervised learning analysis of European working condition
    (Cogent Business & Management, 2024-02) Adesina, Olumide Sunday
    Workers require good working conditions to enhance their job performance, in this study, we conducted a survey of European working conditions in 2022 and compared the results with that of 2016 using an unsupervised learning approach for exploratory data analysis and determining the relationships. Hence, the Principal Component Analysis (PCA ) was adopted. The analyses were in two parts for both the 2016 and 2022 surveys. Following the PCA , the first part shows that European workers are mostly characterized by cheerfulness and good spirits. The second part reveals that European workers are best characterized by enthusiasm in their work. Test statistics showed that the European working condition for the two periods does not differ significantly. The working conditions in Europe have not been altered in the space of six years. This study recommends that the working condition in Europe should be improved so that employers would continue to give their best.
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    On logistic regression versus support vectors machine using vaccination dataset
    (Nigerian Society of Physical Sciences, 2024-02-18) Adesina, Olumide Sunday
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    A non-parametric analysis of the effect of Covid-19 pandemic on Nigerians’ well-being based on geopolitical zones
    (JP Journal of Biostatistics, 2024-02-12) Adesina, Olumide Sunday
    The COVID-19 pandemic has crippled the economic activities of so many nations across the globe since its outbreak in 2019. This study is focused on the consequential effect of the COVID-19 pandemic in terms of standard of living, and perception of economic and security situation of Nigerians. A non-parametric approach was adopted on a primary data obtained through the administration of questionnaires online by NoiPolls during the COVID-19 period. The result obtained from this study depicts that there is a significant relationship between the security situation and perception of the country’s economic situation. Kruskal-Wallis test was used to check if there is a significant difference in economic perception, security situation and standard of living where it was observed that there exists a significant difference based on the geopolitical zone. We, therefore, recommend that efforts should be made by the government towards improving the economic state of affairs especially in the southern part of the country as this will in the long run lead to sustainable cities and communities across the geopolitical zones which is one of the goals of SDGs. Moreover, efforts should also be made by the government towards improving the security situation in the north and southeast as improvement in the country’s economic situation has a direct influence on the security position of the country.
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    Modelling the response rate of Apache web server using extreme value theory
    (Scientific African, 2024-01-26) Adesina, Olumide Sunday
    Delay in response is associated with servers used in processing data particularly when there is large number of users. Consequently, the performance of web servers plays a crucial role in the digital ecosystem, necessitating analysing their tail behaviours. Models such as queue models, neural networks have been used for modelling the response time of web servers that are characterised with heavy-tailedness. Such models cannot sufficiently describe the behaviours in the tail area of the distributions. Therefore, a proper model is required to fit these extreme responses to have a comprehensive insight into server performance. In this study, an explorative data analysis was conducted on a selected web servers, and the Generalized Extreme Value (GEV) and Generalized Pareto Distribution (GPD) models were fitted to the data. The outcome of the study showed practical applicability of extreme value models to model tail events of response time of a web server relative to the existing studies in literature that ignored extreme behaviours of server response rate. The study highlights the point at which the referenced server would break down, which could account for a total breakdown of work in an organization. Website operators should leverage on these analyses and results to device measures to improve server performance and prevent breakdowns. This study recommends the adoption of extreme value models for modelling web server behaviours, providing valuable insights for enhancing server performance through hardware, software, or configuration adjustments. Additionally, proactive measures like load balancing, alerts, and performance monitoring are suggested to avert extreme events and ensure a reliable and efficient web server operation. These findings contribute to optimizing web server performance and ultimately elevating users' experience and site reliability in the digital landscape which aligns with the Africa's Union's Agenda 2063 (Goal,2) and Sustainable Development Goals (SDGs, 9) that underpins education and skills revolution with advanced technology and innovations.