Browsing by Author "Justo, Jackson John"

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    The 3rd International Training Course in Information Technology-based for Electric Engineering Education
    (2009-11) Mushi, Aviti Thadei; Justo, Jackson John
    This is a report from the representatives of Tanzania to the Third International Training Course in Information Technology-based for Electric Engineering Education. It was held at Electronic Engineering Polytechnic Institute of Surabaya (EEPIS).
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    Development of integrated telemedicine infrastructures for access to specialist doctors for rural communities in Tanzania
    (6th International Conference in Mechanical and Industrial Engineering (MIE' 2020), 2020-09) Justo, Jackson John; Budeba, Mussa Daniel; Wikedzi, Alphone Wendelin; Katandukila, Jestina; Chibwana, Fred; Mushi, Aviti Thadei; Bitebo, Ally; Sisala, Joseph Mwakijale; Katemi, Richard
    This presentation describes a project that develops a solution for the delivery of healthcare services by means of advanced information and communication technologies and control systems.
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    Digitalization of Tanzania Health Care Services: Telemedicine Infrastructures to Link Rural and Urban Areas
    (MUST Journal of Research and Development, 2023-08-10) Mushi, Aviti Thadei; Justo, Jackson John; Katemi, Richard Jackson; Wikedzi, Alphonce Wendelin; Bitebo, Ally Tahir; Mwakijale, Joseph Sisala; Chibwana, Fred Demetrius; Katandukila, Jestina Venance; Budeba, Mussa Daniel
    The majority of people in Tanzania live in rural areas where decent medical care is still a challenge. Consultation with specialists located in cities where hospitals with modern facilities exist becomes impossible for patients living in the rural areas of Tanzania. Patients travel long distances from remote areas to cities and make appointments to see the specialist, for which they incur several costs, including accommodation and subsistence. These can be addressed using Information and Communication Technology (ICT) and mobile phones. However, developing an infrastructure for a platform for bringing specialists or a panel of specialists living in cities to offer consultation services to patients living in rural areas has remained a challenge. This research, therefore, is aimed at improving health care services for rural patients by developing telemedicine technology in the context of Tanzania. This will ensure that patients have access to the specialists as quickly as possible instead of travelling long distances to the cities and spending time and money waiting for appointments. With the proposed system, collection and delivery of samples and drugs using drone technology, real-time online consultation with remote specialist doctors, and telesurgery will be possible. This telemedicine platform has been developed and tested. Patients could register, and doctors could prescribe tests and medicine within the system. Both video and audio calls were possible. Payments using the NHIF cards were demonstrated. The drone carried dummy samples from Magufuli Hostels to the UDSM Health Centre in Dar es Salaam. Further improvements could be made by testing the system with a much larger population over longer distances.
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    Overview of optimal operations of renewable energy power systems in microgrid and virtual power plants
    (Elsevier, 2023-11-23) Mushi, Aviti Thadei; Mnkeni, Godwin Elinazi; Justo, Jackson John; Mwasilu, Francis Avilus; Mwinyiwiwa, Bakari Mohamedi Mfaume
    Renewable energy sources (RES) in microgrids and virtual power plants are considered to be the backbone of these power systems. The RESs have been shown recently to reduce the costs per kWh by 85% in South Africa, some viability to electrify airport in Tanzania [1,2], and rural villages [2 4] Some reported case studies show that investing in the same project five years later has a great impact on running costs [5] and can improve electrification rates as some other technologies can [6 8]. The RESs in microgrid configuration are considered to be the most costeffective power solutions to meet the load requirements of people that live in rural areas [9,10].
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    Overview of Renewable Energy Power System Dynamics
    (Elsevier, 2023-11-23) Mushi, Aviti Thadei; Suwi, Owdean; Justo, Jackson John
    Depletion of fossil fuel, global warming, and environmental pollution clarify the importance of renewable energy sources (RESs). Renewable energy is derived from the Earth’s natural resources that are not finite or exhaustible, especially during human lifetime. Renewable resources include biomass energy (such as ethanol), microbial fuel cell [1], hydropower, geothermal power, wind energy, and solar energy [2]. Offline solar photovoltaic (PV) can power rural villages [3 5], or airports [6] at an equitable levelized cost of energy (LCOE) if the wind is not enough to give economies of scale [7 9].
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    Performance analysis of renewable energy resources in rural areas: Case study of solar energy
    (Tanzania Journal of Engineering and Technology, 2020-06) Justo, Jackson John; Mushi, Aviti Thadei
    This paper presents an overview of the recent development trends of solar photovoltaic (PV) systems and the performance in the Tanzanian context. The two types of solar power generation that are considered in this paper are: i) solar PV systems and ii) concentrated solar power (CSP). The two are compared in terms of cost of energy and energy storage mechanism. Moreover, the effect of ambient temperature on the solar PV module is analyzed. In addition, a detailed analysis on using solar axis tracking to increase the power generation is also presented. The extent to which the cell surface temperature and orientation of the solar module which determine the power generation is modeled. Since Tanzania has the possibility to utilize the solar irradiance in the Coastal region to generate solar power, and therefore it is selected as the case study in this paper.
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    Studying Dielectric Losses of Serially Combined Silicone Rubber and Epoxy Resin
    (College of Engineering and Technology, University of Dar es Salaam, 2023-02-28) Mushi, Aviti Thadei; Justo, Jackson John; Kyaruzi, Alexander Lugatona
    High voltage outdoor insulation systems are conventionally ceramics and glass with several advantages, such as proven in field, excellent dielectric properties, durability, and long life. However, they are heavy, attract vandals and break easily, and they can lose their dielectric properties easily when subjected to high voltage transients, arcing, and surges. To curb this, polymer insulators are used because they have excellent dielectric properties such as those of ceramics and glass, with the added advantages that they don’t break easily, and they recover their lost dielectric properties after any electrical transients. Therefore, this paper investigates the dielectric properties of polymeric materials – silicone rubber (SR) and epoxy resin (ER). Some of the SR samples were manufactured in the laboratory, and others were obtained from industrial manufacturer. All the ER samples were manufactured in the laboratory. The dielectric measurements were performed with the Insulation Diagnostics System. Within the measured frequency ranges, the dielectric losses of SR manufactured industrially differ with the laboratory manufactured specimens. This is due to presence of filler materials in the industrially manufactured samples. For the case of serially connecting the SR and ER, there was higher influence of dielectric loss of SR than the ER with some remarkable dielectric losses at some frequencies.