Programme: Industrial Physics
Permanent URI for this collectionhttp://itsupport.cu.edu.ng:4000/handle/123456789/28785
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Item Qualitative Analysis of Background Radiation from 238U, 232Th and 40K in Selected Locations in Ekiti State using Aeroradiometry Data(ICSSD 2024, 2025) Morakinyo, R. O; Usikalu, M. R.; Adagunodo, T. A.; Ojo, O. F.; Babarimisa, I. O.Airborne radiometric data collected from Nigeria Geological Survey Agency (NGSA) for selected locations of Ekiti State were analyzed using Oasis Montaj to measure the radionuclides content of the air at 500 m above the ground. The absorbed dose was consequently estimated from the radionuclides content measured in order to determine the possible radiation risk to the dwellers of the locations. The estimated activity concentration of 238U, 232Th and 40K ranges from 0.77-9.50 ppm, 3.49-52.84 ppm and 0.21-4.40% respectively. The radionuclides content was re-construe in Bq/kg using the relevant conversion factors and the values range from 9.49-117.36 Bq/kg, 14.17-214.51 and 65.33-1377.32 for 238U, 232Th and 40K accordingly. The qualitative analysis gave the value of the absorbed dose of 31.92-214.04 nGy/h. The ternary map indicates the relative abundance of 40K in the study area.Item Background Gamma Radiation in Grazing Patch Lands and Earthen Fish Ponds in Ota, Nigeria(ICSSD 2024, 2025) Babarimisa, I. O.; Usikalu, M. R.; Omeje, M.The pursuit of Sustainable Development Goal 3 (SDG3) concerning sound health and well being is being given much attention in many countries. This study investigates the safety of inhabited environments in relation to background gamma radiation levels linked to naturally occurring radionuclides (NORs). The research focuses on the Iju-Gas-Pipeline area, a significant settlement within the Ado Odo/Ota Local Government Area, comprising both residential and commercial zones. Radioactivity levels were measured in-situ around a grazing land and an earthen fishpond located in the Iju-Gas-Pipeline grassland and valley, respectively. The impact of natural radionuclides on the area was assessed by measuring ambient gamma dose rates and specific activities of radioelements using a mobile RS-125 gamma spectrometer made by Radio Solution Inc. Evaluations of radiological health risk indices were done using the specific activities of the NORs. For the grazing land, background gamma dose rates ranged from 13.94 to 17.92 nGy/h, with an average of 15.40 nGy/h. Specific activities of NORs 40K, 238U, with 232Th varied from 0.0 to 63.20, 22.14 to 34.44, and 1.23 to 6.81 Bq/kg, respectively, yielding average values of 47.40, 27.95, and 4.62 Bq/kg. In contrast, the earthen fishpond exhibited ambient gamma dose rates from 2.54 to 10.80 nGy/h, averaging 7.54 nGy/h, with activity concentrations of 40K, 238U, with 232Th averaging 0.00, 15.17, and 2.34 Bq/kg, respectively. All measured background gamma dose rates and average activity concentrations of NORs were much below their respective threshold limits: 59.00 nGy/h; 420.00, 33.00 and 45.00 Bq/kg. Moreover, the evaluated means of the seven radiological hazard indices considered were significantly lower than their associated permissible levels: 370 Bq/kg, 1, 1, 59.00 and 84.00 nGy/h, 1 and 0.29. Therefore, this study concludes that the Iju-Gas-Pipeline area is radiologically safe.Item Development of Energy-Efficient Smart Switch and Lighting System(ICSSD 2024, 2025) Usikalu, M. R.; Okogbue, S. C.; Ogunwale, E. I.The need for better security measures in controlling access to vital utilities bring about the high demand for smart home systems. In this project a smart switch and socket system was developed using the ESP8266 microcontroller and the Blynk application as wireless control. The main goal is to design and implement a cost-effective system that ensures dependable remote control and monitoring of electrical devices. The project provides a functional prototype capable of managing device states and enabling power cut-off for safety especially in school environments, to enhance child safety by adding the ESP8266 with relay modules. The Blynk app was used which facilitates effective monitoring and control of various electrical loads. Effective monitoring and control of various loads was facilitated by the Blynk app. The results showed that the microcontroller’s response time in putting on relay 1 and putting off relay 2 respectively were 1.2 and 1.1 seconds. In case when the load exceeds the safe limit, it ensures power cut off enhancing the safety and reliabilityItem Qualitative Analysis of Background Radiation from 238U, 232Th and 40K in Selected Locations in Ekiti State using Aeroradiometry Data(ICSSD 2024, 2025) Morakinyo, R. O.; Usikalu, M. R.; Adagunodo, T. A.; Ojo, O. F.; Babarimisa, I. O.Airborne radiometric data collected from Nigeria Geological Survey Agency (NGSA) for selected locations of Ekiti State were analyzed using Oasis Montaj to measure the radionuclides content of the air at 500 m above the ground. The absorbed dose was consequently estimated from the radionuclides content measured in order to determine the possible radiation risk to the dwellers of the locations. The estimated activity concentration of 238U, 232Th and 40K ranges from 0.77-9.50 ppm, 3.49-52.84 ppm and 0.21-4.40% respectively. The radionuclides content was re-construe in Bq/kg using the relevant conversion factors and the values range from 9.49-117.36 Bq/kg, 14.17-214.51 and 65.33-1377.32 for 238U, 232Th and 40K accordingly. The qualitative analysis gave the value of the absorbed dose of 31.92-214.04 nGy/h. The ternary map indicates the relative abundance of 40K in the study area.Item URSI-NG CONFERENCE 2021 ON THE FUTURE OF RADIO COMMUNICATION: PROSPECTS AND CHALLENGES(URSI-NG 2021, 2025) Adimula, L. A.; Ojo, J. S.; Ogunjo, S. T.; Ajewole, M. O.; Falodun, S. E.; Willoughby, A. A.; Usikalu, M. R.In 1899, Guglielmo Marconi transmitted a message by radio across the English Channel, and, in 1901; he sent signals across the Atlantic Ocean from Cornwall, England to Signal Hill Newfoundland. Radio communication research has since then developed in leaps and bounds. Today, the developments in radio communication have taken many diverse forms requiring a sound understanding of the processes involved. The widespread availability and applications of radio communication devices in the various emerging fields have also come with prospects and many challenges to the quality of signals being transmitted and received. The challenges can only be substantially mitigated through sound research and understanding of the environment through which radio waves propagate. These and more are the reasons the International Union of Radio Science-Nigeria (URSI-NG), a foremost professional association for radio scientists and engineers in Nigeria have come up to hold the 7th National Annual Conference (Virtual) in 2021titled: The Future of Radio Communication: Prospects and Challenges to foster sharing of knowledge among all the stakeholders including the network service providers, military, etc that will assist in the better understanding of radio wave propagation, especially in a tropical environment. To this end, scholarly research papers are invited from seasoned researchers, engineers, scientists, technologists, students, service providers, and all stakeholders for presentation at the 7th Annual Conference which was held virtually from 22nd to 24th June 2021. For this year’s conference, the virtual mode was chosen. This was due to the prevailing health and security situation within Nigeria. The organizers chose the Federal University of Technology Akure, Ondo State, Nigeria as the base of operations. The conference was held over a period of three days to properly attend to all submissions. There were three plenary speakers who spoke for thirty minutes each followed by a discussion session. Only oral presentations were allowed due to platform restrictions. Each presenter was given fifteen minutes for the presentation and five minutes for questions and answers. Breakout sessions were created for interactions among participants. In all, about eighty-five participants with thirty-three presenters were registered for the conference. The organizing and editorial committee of the conference will like to appreciate all the authors and reviewers for their support and contributions.