Browsing by Author "Ajayi, M.O."

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    Development af a Near Field Communication-Based Attendance And Course Verification System
    (Faculty of Computing and Informatics, LAUTECH, Ogbomoso, 2024) Ajayi, A.R.; Olawole, E.T.; Ajayi, M.O.; Mahmud, H.O.
    The task of taking class attendance using the conventional paper-based method can be a challenge with increased number of studentsโ€™ enrolment for a course. The method is time consuming, prone to errors and unfairness in the process. An NFC-based attendance and course verification system is presented in this study. The system reads studentโ€™s data from the school ID card when brought in close proximity with an NFC module and sends the data to a web application where the attendance is taken and course(s) is verified as applicable. The technique is simple, cost effective and saves time. The developed system takes less than 3seconds to take a studentโ€™s attendance while compared with the manual paper-based method which took an average of 17seconds
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    Mesh Plot- Based Analytical Selection Of Optimal Mq-Series Gas Sensor Parameters
    (Faculty of Computing and Informatics, LAUTECH, Ogbomoso, Oyo State, Nigeria., 2024) Ajayi, A.R.; Adebayo, O.F.; Ajayi, M.O.
    Metal Oxide Semiconductor or MOS-Type gas sensors are a type of sensors that can detect presence of some volatile, oxidizable or reducible substances in an environment. The sensitivity of these sensors depend on the selection of the appropriate parameters in terms of the sensor resistance in clean air (๐‘…๐‘œ) and the load resistance value (๐‘…๐ฟ). A mesh plot analytical method for determing these parameters is presented in this paper. The model equation for MQ-135 sensor as a case study was derived and this was used to generate the mesh surface plot of the various relationships existing between the different parameters leading to the selection of the optimal value that can give a useful sensor output voltage. The mesh surface plot of ๐‘…๐‘œ (ฮฉ), ๐‘…๐‘  (ฮฉ) and concentration (ppm) and as well as the plot of ๐‘…๐ฟ(ฮฉ), ๐‘‰๐‘…๐ฟ(V) and ๐‘…๐‘ (ฮฉ) were critically examined. The result of the simulation shows that, for optimal sensor output in MQ-135 sensor, the ๐‘…๐‘œ value must be selected to be at a value of 30kฮฉ and the load resistor ๐‘…๐ฟ at a value of 47kฮฉ for effective sensor output.