Now showing items 19-29 of 29

    • On the performance, availability and energy consumption modelling of clustered IoT systems 

      Enver, Ever; Purav, Shah; Mosdarda, Leonardo; Omondi, Fredrick; Orhan, Gemikonakli (University of Nairobi, 2019)
      Wireless sensor networks (WSNs) form a large part of the ecosystem of the Internet of Things (IoT), hence they have numerous application domains with varying performance and availability requirements. Limited resources ...
    • Optical properties of amorphous Se90-XIn10SbX thin film alloys 

      Muiva, Cosmas M.; Mwabora, Julius M; Sathiaraj, T.S; King, James G (University of Nairobi, 2016)
      Ternary thin film alloys of Se90-XIn10SbX (x = 1, 4, 10, 15 and 20) were synthesised by flash evaporation of the pre-melt quenched bulk samples under a vacuum of 10−5 Torr. Optical absorption analysis pointed to indirect ...
    • Perpendicular magnetic anisotropy in Mn2VIn (001) films: An ab initio study 

      Muthui, Zipporah; Musembi, Robinson; Mwabora, Julius; Arti, Kashyap (University of Nairobi, 2017)
      First principles study of the magnetic anisotropy of Mn2VIn (001) films show perpendicular magnetic anisotropy (PMA), which increases as a function of the thickness of the film. Density functional theory (DFT) as implemented ...
    • Personal Cloud Computing Adoption: Integrating IT Mindfulness with TAM 

      Oredo, John (University of Nairobi, 2020)
      While extant literature is replete with studies on cloud computing adoption by organizations, there is a dearth of empirical literature on personal cloud computing adoption. This study aims at understanding how individuals ...
    • Photocatalytic degradation of 4-chlorophenol by titanium dioxide: role of annealing temperature and morphology 

      Tum, P.K; Kariuki, D.K. (Journal of Applied Sciences and Environmental Management, 2020-01)
      This work investigates the degradation rate of 4-cholorophenol using Titanium dioxide photocatalysts. Chlorophenols and their compounds are a nuisance as they are recalcitrant to degradation in the environment. Three ...
    • The Role of ICT Tools in the Access of Climate Information by Rural Communities 

      Yohannis, Michaelina A; Wausi, Agnes; Mwololo, Tim; Hutchinson, Margaret (University of Nairobi, 2019)
      This paper, seeks to explore how rural communities especially women in Kitui county use ICT tools to access localized climate information and how Digital Capital facilitates or impedes the process. Our view is that the ...
    • A Simplified Method for Parameter Determination of a Photovoltaic Module using Manufacturer’s data 

      Ndegwa, Robinson; Ayieta, Elijah; Simiyu, Justus; Odero, Nicodemus (University of Nairobi, 2020)
      Accurate and fast modelling and simulation of Photovoltaic module requires careful determination and identification of the unknown parameters required in fitting the voltage-current and power-voltage curves to replicate ...
    • A Simplified Simulation Procedure and Analysis of a Photovoltaic Solar System Using a Single Diode Model 

      Ndegwa, Robinson; Ayieta, Elijah; Simiyu, Justus; Odero, Nicodemus (University of Nairobi, 2020)
      A single diode model for a photovoltaic solar module is the most ideal and quick way of analyzing the module characteristics before implementing them in a solar plant. Solar modules manufacturers provide information for ...
    • Surface Photovoltage Study of Surface Defects on Co-Doped TiO2 Thin Films Deposited by Spray Pyrolysis 

      Wafula, Henry; Juma, Albert; Sakwa, Thomas; Musembi, Robinson; Simiyu, Justus (University of Nairobi, 2016)
      Surface photovoltage (SPV) spectroscopy is a powerful tool for studying electronic defects on semiconductor surfaces, at interfaces, and in bulk for a wide range of materials. Undoped and Cobalt-doped TiO2 (CTO) thin ...
    • Water and the UN sustainable development goals 

      Campos, Luiza C; Olago, Daniel; Osborn, Dan (University of Nairobi, 2022)
      Water is essential for life, but we need to balance human needs with those of the environment on which we depend for our wellbeing, our health and much of our wealth. Not all of us are lucky enough to have access to ...
    • Water quality issues in East Africa 

      O, Wandiga; O, Madadi (Department of Chemistry, University of Nairobi, 2009)
      The paper shows that in the analysis of a queuing system with fixed-size batch arrivals, there emerges a set of polynomials which are a generalization of Chebyshev polynomialsof the second kind. The paper uses these ...