Browsing School of Pure and Applied Sciences by Title
Now showing items 228-247 of 259
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Salary Determinants for Higher Institutions of Learning in Kenya
(2014)There has been a debate over the years on which category of salary determinants best predicts an employee salary, that is, whether it is organizational characteristics or individual attributes. This study adopts a hybrid ... -
Sediment Accumulation in Fish Ponds; Its Potential for Agricultural Use
(2014)ABSTRACT An experiment was conducted at the World Fish Center in Egypt, to describe and quantify sediment and nutrient accumulation in semi-intensive tilapia ponds, evaluate the effect of input type and stocking density ... -
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 ... -
Signal monitoring and performance stability evaluation tool in a high speed optical communication network
(Elsevier, 2016)The diverse communication systems in South Africa have changed drastically over the last few years and are envisioned to continue to improve as evidenced by the deployment of high speed optical fibre networks, in both ... -
A silver Nanoparticle/Poly (8-Anilino-1-Naphthalene Sulphonic Acid) Bioelectrochemical Biosensor System for the Analytical Determination of Ethambutol
(2011)Ethambutol (2S, 2′S)-2, 2′-(ethane-1, 2-diyldiimino) dibutan-1-ol) is a first-line antitubercular drug effective against actively growing Mycobacterium tuberculosis. Resistance of the mycobacterium to ethambutol among ... -
Simulation of Dimple Characteristics on the Trajectories of a Dimpled Sphere (Golf Ball) in Motion
(2018)A mathematical model describing the flight motion of a golf ball is developed, and the effects of dimple characteristics are studied. Using the Newton’s second law of motion, the equations governing the motion of the golf ... -
Simulation of Traffic Congestion at Unsignalised Intersections using aMicroscopic Traffic Flow Model
(Journal of Applied Mathematical Sciences, 2016)In this paper, we study and present a Microscopic Simulation of traffic in an unsignalised intersection using a Microscopic Car Following model based on the General Motors Theory (GM). The adverse effect caused by the ... -
Simultaneous detection of anthracene and phenanthrene on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite modified carbon electrode
(IOSR Journal of Applied Chemistry, 2019-02-22)A simple and highly selective amperometric sensor for simultaneous determination of anthracene (AN) and phenanthrene (PHE) has been developed based on a composite of overoxidized-polypyrrole (PPyox) and Ag-Au ... -
Smallholder Farmers’ Perceptions and Adaptations to Climate Change and Variability in Kitui County, Kenya
(OMICS International, 2017)The effects of climate change have highly challenged the productivity of the agricultural sector. The increasing temperatures and erratic rains, as well as diseases and pests have significantly reduced crop yields in the ... -
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 ... -
Social Value Formation and Switching toTtithonia in Nzoia River drainage
(Global Business & Economics Anthology, 2010)Following Ozaki (2009) the paper examines positive social values for switching from inorganic fertilizers to* tithonia in the NRDB. The predominance of sugar cane production in the NRDB generates immense water 3 pollutants ... -
Species Composition, Phenotypic and Genotypic Resistance Levels in Major Malaria Vectors in Teso North and Teso South Subcounties in Busia County, Western Kenya
(Hindawi, 2020-01)Knockdown resistance (kdr) is strongly linked to pyrethroid insecticide resistance in Anopheles gambiae in Africa, which may have vital significance to the current increased use of pyrethroid-treated bed net programmes. ... -
Stability Analysis Using Nonstandard Finite Difference Method and Model Simulation for Multi-Mutation and Drug Resistance with Immune-Suppression.
(2018)We introduced recently a model that takes into account mutation and drug resistance of tumor cells in a case of simple immune system and immune-suppression caused by the resistant cells. The present study is to apply the ... -
Statistical techniques for modeling extreme price dynamics in the energy market
(IOP Publishing, 2013)Extreme events have large impact throughout the span of engineering, science and economics. This is because extreme events often lead to failure and losses due to the nature unobservable of extra ordinary occurrences. ... -
Structural and optical characteristics of dysprosium-doped zinc zirconate nanocomposites
(Optica Publishing Group, 2020-09)Zinc zirconate nanocomposites with varying compositions of Dy3+ ions were synthesized through a solution combustion method using citric acid as a fuel. There were mixed hexagonal ZnO and cubic ZrO2 phases in the X-ray ... -
Study of atrazine degradation in soil fromKenyan sugarcane-cultivated fields in controlledlaboratory conditions
(2009)A study to compare the extent of atrazine mineralization in soils from Kenyan sugarcane-cultivated fields with and without history of atrazine use was carriedout in the laboratory under controlled conditions. The study was ... -
A Study of Solutions to Euler Equations for a One Dimensional Unsteady Flow
(American Journal of Comp utational and App lied M athematics, 2013)In this paper we deal with the Euler equations for Isothermal gas. In analyzing the equations we obtain two real and distinct eigenvalues which enables us to determine the wave structure of the possible solutions to the ... -
A study of two-phase Jeffery Hamel flow in a geothermal pipe
(IJAAMM, 2018)In this paper a two-phase convergent Jeffrey-Hamel flow in a geothermal pipe concentrated with silica particles and thermophoresis has been studied. The governing equations are equation of mass, momentum, heat transfer ... -
Suitability of Athi River Water for Irrigation within Athi River Town and Its Environs
(Science Domain, 2016)Aims: To assess the suitability of the Athi River water for irrigation in Athi River area and its environs. Study Design: The study design was purposive with sampling points deliberately chosen to assess the water quality ... -
A Synoptic Ecopath model of biomass flows during two different static ecological situations in Lake Nakuru (Kenya)
(Department of Zoology, University of Nairobi, 2001)Trophic relationships inside the Lake Nakuru ecosystem during two different phases are described by using the ECOPATH model. This allows a partial explanation of the ecological changes observed in the lake and to show that ...