Browsing School of Pure and Applied Sciences by Title
Now showing items 127-146 of 259
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An integrated OADM based on Bragg trans-reflectance in 1550 nm VCSEL optical fibre access networks
(Elsevier, 2018)We experimentally demonstrate an all passive OADM using a single BGF, a pair of optical circulators and the low cost and energy efficient VCSELs. In this study, double reflection due to Bragg effect on a single fibre ... -
Intensification of Agriculture as the Driving Force in the Degradation of Nzoia River Basin: the Challenges of Watershed Management
(2007)The Lake Victoria riparian countries suffer from devastating effects of floods and droughts occasioned by severe weather related natural phenomena. The floods often follow prolonged droughts that have become a mark of ... -
Interaction between the Linear and Nonlinear Polarization in Optical Fibre
(2014)Interaction between polarization mode dispersion (PMD) and nonlinear induced birefringence in a fibre with consideration of mode coupling has been investigated theoretically using Matlab and Optism. The investigations show ... -
Investigation of Pressure Distributions for a Finite Elasto-Hydrodynamic Journal Bearing Lubricated by Ferro Fluids with Couple Stresses
(2014)The performance of finite elastohydrodynamic journal bearings lubricated by ferrofluids with couple stresses has been studied. We derive a Reynolds equation that takes into account magneto elastohydrodynamics, by using the ... -
Investigation of pressure distributions for a finite elastohydrodynamic journal bearing lubricated by Ferro fluids with couple stresses
(Journal of Computations and Modelling, 2015)The performance of finite elastohydrodynamic journal bearings lubricated by ferrofluids with couple stresses has been studied. We derive a Reynolds equation that takes into account magneto elastohydrodynamics, ... -
Investigation of Temperature effects for a finite elasto-hydrodynamic journal bearing lubricated by Ferro fluids with couple stresses
(2015)The performance of finite elasto-hydrodynamic journal bearings lubricated by ferrofluids with couple stresses has been studied. We derive the energy equation that takes into account magneto elasto-hydrodynamics. The ... -
Investigation of the effect of precursor ratios on the solution combustion synthesis of zinc zirconate nanocomposite
(Elsevier, 2019)Zinc zirconate nanocomposite was synthesized by a low-temperature solution combustion method using citric acid as fuel at a pH of 7. The synthesis was done by varying the ratios of zirconium butoxide and zinc nitrate, which ... -
Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings
(Science China Press, 2019)The use of reversible pump turbines (RPT) within pumped storage power plants goes with prolonged periods of off-design operating conditions, which leads to the onset of operating mode-dependent instabilities. In order to ... -
Isolation and Identification of Hexazinone-Degrading Bacterium from Sugarcane-Cultivated Soil in Kenya
(Springer US, 2014)The s-triazine herbicide hexazinone [3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4(1H,3H)- dione], is widely used in agriculture for weed control. Laboratory biodegradation experiments for hexazinone in ... -
Isolation And Testing The Cholesterol Reduction Ability (In-Vitro) Of Lactococcus Lactis From Fermented Smooth Pigweed (Amaranthus Hybridus) Leaves
(Bioline International, 2011)Probiotics are live microbial feed supplements, which positively affect the host animal by improving its intestinal microbial balance. Studies have shown probiotic activities of Lactococci isolated from dairy foods, which ... -
Kinetic derivation of a Hamilton-Jacobi traffic flow model
(2012)Kinetic models for vehicular traffic are reviewed and considered from the point of view of deriving macroscopic equations. A derivation of the associated macroscopic traffic flow equations leads to different types of ... -
Kinetics of Degradation of Metribuzin in aqueous solution using Zero Valent Iron Nanoparticles
(2018-06)In this work, zero-valent iron nanoparticles (nZVI NPs) were synthesized in (EW-Fe0) ethanol -water mixed system and have been evaluated for degradation in aqueous solution of metribuzin. The batch experiments at varying ... -
Lactic Acid Bacteria from African Fermented Cereal-Based Products: Potential Biological Control Agents for Mycotoxins in Kenya
(Journal of Toxicology, 2022)Cereals play an important role in global food security. Data from the UN Food and Agriculture Organization projects increased consumption of cereals from 2.6 billion tonnes in 2017 to approximately 2.9 billion tonnes by ... -
Lake Naivasha, Kenya: Ecology, Society and Future
(Freshwater Biological Association, 2011)We examine the degradation of the natural capital and ecosystem services of an important tropical lake, Kenya’s Lake Naivasha, in the context of human activities and exploitation since the mid-20th century. These factors ... -
A Levy Regime-Switching Temperature Dynamics Model for Weather Derivatives
(2018)Weather is a key production factor in agricultural crop production but at the same time, the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production ... -
LÉVY PROCESS BASED ORNSTEIN-UHLENBECK TEMPERATURE MODEL WITH TIME VARYING SPEED OF MEAN REVERSION
(Pushpa Publishing House, 2018)In this study we develop a Lévy process driven Ornstein-Uhlenbeck daily temperature model. The model takes into account a time dependent speed of mean reversion. It is statistically demonstrated that historical data and ... -
Limit Theory of Model Order Change-Point Estimator for GARCH Mode
(Scientific Research Publishing, 2018)The limit theory of a change-point process which is based on the Manhattan distance of the sample autocorrelation function with applications to GARCH processes is examined. The general theory of the sample autocovariance ... -
Magnetohydrodynamic (MHD) Free Convective Flow past an Infinite Vertical Porous Plate with Joule Heating
(2013)This work addresses the problem of Magnetohydrodynamic laminar unsteady flow of an incompressible electrically conducting fluid past an infinite vertical porous plate. It investigates how joule ... -
THE MAJOR ENVIRONMENTAL FACTORS THAT INFLUENCE RAPID DISAPPEARANCE OF PESTICIDES FROM TROPICAL SOILS IN KENYA
(Toxicological & Environmental Chemistry, 2001)Results of field and laboratory studies on adsorption/desorption, leaching, dissipation, bound residue formation and metabolism of DDT, DDE, lindane, parathion, malathion, dimethoate and carbofuran in tropical soils in ... -
Male Circumcision: A Means to Reduce HIV Transmission between Truckers and Female Sex Workers in Kenya
(2022-06)Kenya records over 1.5 million cases of HIV-infected people with a prevalence of 4.8% among adults in 2019, ranking Kenya as the seventh-largest HIV population in the world. A recent study showed that 55.9% of Kenyan ...