School of Pure and Applied Sciences: Recent submissions
Now showing items 181-200 of 259
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Effects of the direction of a transverse magnetic field on unsteady MHD Couette flow with suction and injection
(International Journal of Education and Research, 2015)In this paper, the problem of an unsteady magnetohydrodynamic viscous incompressible electrically conducting fluid flow subjected to a constant pressure gradient in the presence of a uniform transverse magnetic field applied ... -
Control volume method for modelling slightly compressible flow reservoirs
(2015)Numerical simulation is widely used for predicting reservoir behavior and forecasting its performance. In this paper numerical modeling isperformed to simulatesingle phase flow in oil reservoir in horizontal ... -
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 ... -
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 ... -
Growth performance and intestinal morphology of African catfish ( Clarias gariepinus , Burchell, 1822) larvae fed on live and dry feeds
(2018)Effects of live and dry feeds on intestinal morphology and growth of African catfish, Clarias gariepinus, larvae (Burchell, 1822) were investigated from 2 days post hatching (dph) to 6 dph and 11 dph, respectively. Feeding ... -
Factors Influencing Smallholder Farmers’ Adaptation to Climate Variability in Kitui County, Kenya
(Juniper Publishers, 2018-02)The study was carried out to examine the factors and constraints that influence small farmers’ adaptation to climate variability in Kitui County. Descriptive survey design was used. Two villages, Kaveta and Mikuyuni, were ... -
Modelling Multi-Mutation and Drug Resistance: A case of Immune-Suppression
(Research India Publications, 2018)A model that takes into account multi-mutation and drug resistance in a case of simple immune system and immune-suppression caused by drug resistant tumor cells is proposed. Since methods for revising therapeutic approaches ... -
Smoothed Conditional Scale Function Estimation in AR(1)-ARCH(1) Processes
(Hindawi Publishing Corporation, 2018-03-12)The estimation of the Smoothed Conditional Scale Function for time series was taken out under the conditional heteroscedastic innovations by imitating the kernel smoothing in nonparametric QAR-QARCH scheme. The estimation ... -
A VCSEL-based backbone extended-reach optical fibre network: Supporting up to 10 Gbps flexible access networks for Africa
(2018)In this paper, using vertical cavity surface-emitting lasers (VCSELs) and Raman amplification, a low power consuming, energy-efficient and cheap technique to transmit high speed data signals over optical fibre is ... -
Analytical and numerical investigation of unsteady wind for enhanced energy capture in a fluctuating free-stream
(Elsevier, 2017)Unsteady wind is characterized by low energy content and large fluctuations. A Computational Fluid Dynamics (CFD)-based method for capturing wind energy in a fluctuating free-stream, supported by analytical formulations, ... -
Application of Conditional Autoregressive Value at Risk Model to Kenyan Stocks: A Comparative Study
(Science Publishing Group, 2017-05-22)Value at Risk (VaR) became the industry accepted measure for risk by financial institutions and their regulators after the Basel I Accords agreement of 1996. As a result, many methodologies of estimating VaR models used ... -
Numerical and experimental study of pressure-wave formation around an underwater ventilated vehicle
(Elsevier, 2017)The objective of this study was to understand better the ventilated cavitation flow structure around an underwater ventilated vehicle. A high-speed camera system was used to observe the cavity evolution of unsteady ... -
Green Remediation of Carbamazepine from Water Using Novel Magnetic Iron Modified Carbonized Baggasse: Kinetics, Equilibrium and Mechanistic Studies
(SCIENCE DOMAIN, 2017-03-15)Baggasse derived biochar magnetically modified with iron (α-Fe2O3-CBG) was fabricated, characterized and applied as a low-cost adsorbent for the removal of carbamazepine (CBZ), a pharmaceutically active compound which ... -
Exponentiated generalized exponential Dagum distribution
(Elsevier, 2017)In this study, the exponentiated generalized exponential Dagum distribution has been proposed and studied. This family of distribution consists of a number of sub-models such as the exponentiated generalized Dagum ... -
Organochlorine Pesticides Residues in Lake Naivasha Catchment Water
(2017)Lake Naivasha, Kenya, hangs precariously in balance between economic exploitation and biodiversity conservation. There is increasing intensity of horticultural activities around the lake, believed to result in excessive ... -
Reconfigurable high-speed optical fibre networks: Optical wavelength conversion and switching using VCSELs to eliminate channel collisions
(Elsevier, 2017-01)We experimentally provide an alternative solution to channel collisions through upwavelength conversion and switching by using vertical cavity surface-emitting lasers (VCSELs). This has been achieved by utilizing purely ... -
Demonstration of Raman-based, dispersion-managed VCSEL technology for fibre-to-the-hut application
(Elsevier, 2017-03)For the first time, we experimentally investigate the use of vertical cavity surface emitting lasers (VCSELs) in the fibre-to-the-home (FTTH) flavour for Africa, known as fibre-to-the-hut. Fibre-to-the-hut is a VCSEL ... -
A signal impairment-aware scheme for next-gen flexible spectrum in 10 Gb/s VCSEL metro-access optical fibre networks
(Elsevier, 2017-07)We experimentally characterized and optimized link performance of a multi-node flexible spectrum network. The cheap and low power consuming and wavelength tunable vertical cavity surface-emitting lasers (VCSELs) have ... -
Discussion on Generalized Modified Inverse Rayleigh
(2018-01-01)In this paper, a generalization of the modified inverse Rayleigh distribution called the new exponentiated generalized modified inverse Rayleigh distribution is proposed and studied. Various sub-models of the new distribution ...
