Browsing by Author "Aliu, T. O."

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    Characterization of Optimal Control Model of Sorghum Production
    (Islamic University, Uganda, 2020) Aderinto, Y. O.; Issa, T. L.; Afolabi, A. O.; Aliu, T. O.
    In this work, an optimal control model of sorghum production with all the possible threats at every stages was formulated with the use of biological and botanical controls to maximize sorghum production. The model was characterized through optimal control approach and numerical implication was carried out using fourth order Runge-Kutta method. The results show that for optimum production the two controls must be implemented.
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    EXPERIMENTAL MEASUREMENT OF ATTENUATION OF SOBI FM SIGNALS AT VHF ALONG ILORIN JEBBA ROAD, NIGERIA
    (Nigerian Journal of Physics (NJP), 2022) Ajani, A.; Egebeyale, G. B.; Yusuf, O.; Aliu, T. O.; Aremu, O. A.; Odeyemi, C. S.; Oyero, O .
    The study of the propagation loss at very high frequency (VHF) band precisely 101.9 MHz (Sobi FM) signals was carried out in this research. It involves Experimental measurement and theoretical calculation using the existing Friis [FA] and Free Space attenuation [FSA] formula to determine the attenuation and the fade margin of 101.9MHz (Sobi FM) signals along Ilorin (Lat 80541; Long 40551E) – Jebba (Lat 90111N; Long 40821E) links, in Nigeria. The experimental measurement campaign was achieved by using an appropriately designed dipole antenna, using spectrum analyzer to determine the attenuation and the fade margin at regular intervals of two kilometers (2 km) from the base station, up to sixty kilometers (60 km) along the chosen links. The analytical models were obtained in form of polynomial equations for received power, measured attenuation and the fade margin of the signals. The measured results were compared with the calculated results. The calculated results correlated with the measurements (Correlation coefficient value R2 = 1), but gave deviation when compared with the measurements (Chi-square values equal zero for received power, measured attenuation and the fade margin). The variance of the results for the existing formula with the measurements were adjudged to hills, valleys, trees and bends along the links. The highest value of the fade margin obtained (75.89 dB) has not exceeded the receiver’s sensitivity of 80 dB, which implies that the radio-signals can be improved, by increasing the height and the power of transmitting antenna. This research hopes to give information to Sobi FM transmitting station or intending transmission companies on area to improve should there be a need to upgrade or redirecting their transmission signals.