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    Methods of Intellectual Property Valuation in Nigeria: Preference of Estate Surveyors and Valuers in Southwest, Nigeria.
    (Journal of Harbin Engineering University Vol 46 No. 7, 2025-06) Ibisola, A. S.; Ayedun, C. A.; OLOKE, Olayinka C.
    Estate Surveyors and Valuers (ESVs) are by laws, education and training recognised and adjudged as the most qualified professionals to determine the value of interests in property in Nigeria. In doing this, many processes and ingredients are necessary to be blended together to arrive at acceptable and market compliance value. One of such tools or ingredients are the methods of valuation adopted in the course of the valuation processes for different purposes and at a specific point in time. This study evaluates the preference of ESVs among the various methods of IP valuation in Nigeria. Total number of 247 questionnaires was used to elicit data from the practicing ESVs in Southwest, Nigeria. The data obtained were analysed with the use of Relative Importance Index (RII). It was found that the sampled ESVs preferred the use of Rule of Thumbs methods of IP valuation on the basis that the methods are very easy to use and devoid of rigorous calculations. Findings further showed that ESVs preferred the use of Discounted Cash Flow (DCF) and premium profits approaches as variants of income-based methods. The study therefore recommended the inclusion of valuation of IP in the valuation curricula of institutions offering Estate Management in the study area.
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    ASSESSMENT OF AIRBORNE AND TERRESTRIAL RADIOMETRIC CONCENTRATIONS AND ASSOCIATED HEALTH RISKS IN SELECTED LOCATIONS IN SOUTHWEST NIGERIA
    (Covenant University Ota, 2025-08) MORAKINYO, Ruth Omoseeke; Covenant University Thesis
    Radiation is an inevitable part of the human environment, both from terrestrial and anthropogenic sources. Elevation of radiation levels in an environment above the threshold limit is detrimental to man and the ecosystem. Therefore, monitoring the radiation level of every human environment is expedient because of the harmful effect of exposure to ionizing radiation. The radiometric data of selected locations in southwest Nigeria was collected from the database of the Nigeria Geological Survey Agency (NGSA) and analysed using the Oasis Montaj software. The result of the NGSA data served as a guide in the selection of locations for in-situ assessment using an RS-125 handheld gamma spectrometer. Soil and water samples were collected in those locations and some quarry sites and analysed in the laboratory using NaI (TI) detector. The obtained activity concentrations were used to determine the radiological parameter. The absorbed dose rate for analysed aero radiometry data ranges between 31.92-214.04, 36.31-192.77, 13.82-162.02, 6.57-119.62, 10.83-116.93 and 16.4-63.70 nGy/h for Ado-Ekiti, Akure, Ondo, Apomu, Ibadan, and Ijebu-ode sheets respectively. The mean absorbed dose rate for in-situ assessment for the exact locations ranges between 38.00-149.43, 86.00-179.27, 51.21-116.53, 72.76-109.09, 84.32-194.41, 56.27-64.55nGy/h respectively. The results of soil and water samples of selected locations and quarry sites revealed that the absorbed dose rate in soil samples in 80% of the locations and 100% of the quarry sites was higher than the world average value. The estimated total annual committed dose for various categories of ages in all the water samples were higher than the world average value. The estimated annual effective dose and excess lifetime cancer risk in most locations in in-situ assessment and analysis of soil samples was higher than the global limit. Statistical analysis revealed that the concentration of 232Th contributes significantly to the absorbed dose rate in air and the total annual committed dose due to ingestion of water. In contrast, the activity concentration of 40K contributes significantly to the absorbed dose rate in soil samples in the study area. The need for potable water for the various communities in the region cannot be over-emphasized as the total annual effective dose for all categories of ages was higher than the reference limit. The study concludes that analysis of aero-radiometry data can be an effective guide in monitoring the radioactivity level of an environment.