Browsing by Author "Nafuna, Ritah"

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    The differences between single diode model and double diode models of a solar photovoltaic cells: systematic review
    (Journal of Engineering, Technology & Applied Science, 2023-08-21) Eze, Val Hyginus Udoka; Kalyankolo, Umaru; Edozie, Enerst; Nafuna, Ritah; Nansukusa, Yudaya
    This research paper systematically reviewed and investigated single diode model and double diode model of a solar photovoltaic systems in terms of accuracy, differences under major unknown PV parameters, different optimization and fabrication. This research paper reviewed the differences and the similarities between the single diode model and double diode model. From the review, it was clear that single diode model has less computation time and number of unknown parameters compared to double diode model. The double diode model on its own superiority is more accurate under solar shading condition effect than single diode model but single diode model performs better under high insolation levels. None of the two models is superior than the other but the solar photovoltaic modelers/installers should bear the solar irradiance of the environment before installation.
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    Mobile disinfectant spraying robot and its implementation components for virus outbreak: Case study of COVID-19
    (International Journal of Artificial Intelligence, 2023-07-28) Udoka, Eze Val Hyginus; Edozie, Enerst; Musika, Davis; Twijuke, Dickens; Wantimba, Janat; Okafor, Wisdom O.; Kalyankolo, Umaru; Nafuna, Ritah; Nansukusa, Yudaya
    The virus pandemic COVID-19 outbreak brought a huge pressure to the public healthcare system worldwide, especially in developing African countries like Uganda. The Educational system and institutions were put on a standstill due to no quick countermeasures to make the environment clean and safe for normal activities to continue. This paper successfully and comprehensively reviewed the Bluetooth and smart disinfectant spraying robot that successfully controlled the spread of the deadly virus. It also detailed different components that made up the complete spraying robot systems and from this it was observed that spraying robot systems are made up of almost the same components for implementations but differs on program that is embedded on the microcontroller due to different functions. This programing differs based on the functions that the designer/programmer wants the robot to do despite using almost the same components. This research review paper will act as guide for future researchers when designing and implementing a mobile spraying robot.