Faculty of Science & Technology (FST): Recent submissions
Now showing items 101-120 of 4283
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First-principle investigation of structural, electronic and magnetic properties of Co2VIn and CoVIn Heusler compounds
(University of Nairobi, 2017)Investigation of the structural, electronic and magnetic properties of full-Heusler Co2VIn as well as half-Heusler CoVIn Cobalt based Heusler compounds using density functional theory (DFT) leads to the general conclusion ... -
Optoelectronic property refinement of FASnI3 films for photovoltaic application
(University of Nairobi, 2021)Tin (Sn) is a promising substitute for lead (Pb) in organic–inorganic hybrid halide perovskite-photovoltaic devices, but it is prone to delivering low power conversion efficiencies (PCEs) due to the poor quality of ... -
A Fast and Accurate Analytical Method for Parameter Determination of a Photovoltaic System Based on Manufacturer’s Data
(University of Nairobi, 2020)Modeling and simulation of a photovoltaic solar system play a significant role in understanding its behavior in various environmental conditions. Utilization of the datasheet information in modeling and simulation of the ... -
Improving the efficiency and stability of tin-based perovskite solar cells using anilinium hypophosphite additive Check for updates
(University of Nairobi, 2021)Tin (Sn) is a potential replacement for lead in organic–inorganic perovskite solar cell (PVSC) technology due to the attractive optoelectronic properties of Sn-perovskites. However, the poor stability of Sn2+ ions is still ... -
Smartphones Supporting Monitoring Functions: Experiences from Sweet Potato Vine Distribution in sub-Saharan Africa.
(University of Nairobi, 2018)This chapter shares experiences in the use of smartphones to collect monitoring data for sweet potato vine multiplication and dissemination activities in sub-Saharan Africa. An Open Data Kit (ODK) technology is used to ... -
Supplier Selection Process Based on Fuzzy Logic
(University of Nairobi, 2018)In Kenyan governmental organizations, supplier selection during procurement process is regulated by the Public Procurement and Asset Disposal act. The act requires the selection to be done on technical and financial basis, ... -
An assessment of the sustainability of Living Labs in Kenya
(University of Nairobi, 2019)Purpose – There has been a high rate of failure among the Living Labs in Kenya resulting in the expected outcomes not fully realized. This paper aims to assess the sustainability of Living Labs in Kenya. Design/methodo ... -
Strengthening technology risk management in mobile money lending
(University of Nairobi, 2020)Innovative mobile money services have grown tremendously in the East African market. While there are positive effects of technology-enabled financial inclusion, risks exist. This study sought to strengthen the capacity of ... -
Determinants of Mobile Fintech Uptake in Kenyan Microfinance Sector
(University of Nairobi, 2020)The Kenyan microfinance sector faces many challenges such as high operation costs, increased credit risk, low visibility and poor understanding of emerging technology opportunities and risks among others. These problems ... -
Education for Sustainable Development? An Analysis of Financing Wetland Conservation in The Wetlands of Kenya
(University of Nairobi, 2021)Financing education is the future towards environmental protection including wetlands. The focus of this paper is to assess if there is conservation education in various wetlands sites of Kenya, and, to evaluate the key ... -
Characterization of Solar Thermal Energy RadiationPotential of Lake Victoria Region: A Case Study of Homabay County, Kenya
(University of Nairobi, 2018)The study sought to determine solar irradiation in Homa Bay County which can be tapped and utilized in improving lives of residents of the region by converting the solar thermal energy in Home Bay to other forms of energy ... -
Radiological Mapping of the Alkaline Intrusive Complex of Jombo, South Coastal Kenya by In-Situ Gamma-Ray Spectrometry
(University of Nairobi, 2016)Carbonatites and alkaline intrusive complexes are rich in a variety of mineral deposits such as rare earth elements (REEs), including Nb, Zr and Mn. These are often associated with U and Th bearing minerals, including ... -
Magnetic properties of iron nanoparticle
(University of Nairobi, 2010)Magnetic properties of Fe nanoparticles with different sizes synthesized by a physical deposition technique have been investigated experimentally. We have used a high pressure sputtering technique to deposit iron nanoparticles ... -
Effects of Tio2 Film Thickness and Electrolyte Concentration on Photovoltaic Performance of Dye-sensitized Solar Cell
(University of Nairobi, 2017)Effects of film thickness and electrolyte concentration on the photovoltaic performance of TiO2-based dye-sensitized solar cell (DSSC) were studied. Nanocrystalline anatase TiO2 thin films with varying thicknesses (3.2–18.9μm) ... -
On stock returns volatility and trading volume of the nairobi securities exchange index
(University of Nairobi, 2020)This study attempts to put forward a framework that can be utilized to model the dynamics of the underlying returns on asset. The intention is to probe the dynamic connection between volatility of stock returns and trading ... -
ZnO:Sn deposition by reactive evaporation: effects of doping on the electrical and optical properties
(University of Nairobi, 2013)Tin doped zinc oxide thin films have been deposited by reactive evaporation, the deposition has been done at various doping levels ranging from 1% to 8%. The optical properties have been characterized using UV-VIS-NIR ... -
Photo-thermal Conversion Efficiency of Textured and Untextured Aluminum Substrate Coated With Titanium Dioxide (Tio2)-bound Cufemno4 Absorber
(University of Nairobi, 2020)The possibility of obtaining thermal energy from the sun for household bathing and washing has resulted to growth in market for solar thermal applications with new types of solar absorbers ... -
Application of an Organic Plant-derived Binder in the Fabrication of Diatomaceous Earth Waste- Based Membranes for Water Purification Systems
(University of Nairobi, 2020)This work reports on the use of diatomaceous earth (DE) waste and organic binder derived from Corchorus olitorius, locally known as “Mrenda” in the design of an efficient water filtration membranes. Charcoal powder was ... -
Optoelectronic Properties of F-co-doped PTO Thin Films Deposited by Spray Pyrolysis
(University of Nairobi, 2013)F-co-doped Palladium Tin Oxide (PTO) thin films were pyrolytically deposited on glass substrate at 4500 C using an alcoholic precursor solution consisting of Tin (IV) Chloride (SnCl4.5H2O), Palladium Chloride (PdCl2) ... -
Preparation and Characterization of Indium and Gallium doped Transparent ZnO films for Solar cell Applications
(University of Nairobi, 2018)In this work, the effect of indium (In) and gallium (Ga) dopants on the structural, optical and electrical properties of ZnO thin films was studied. ZnO thin films were deposited on glass substrates at 400°C using the ...