Browsing School of Pure and Applied Sciences by Title
Now showing items 244-259 of 259
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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 ... -
Synthesis and characterization of poly (propylene imine) dendrimer–Polypyrrole conducting star copolymer
(Elsevier, 2010)A star copolymer based on poly(propylene imine) (PPI) dendrimer core (generations 1–4) and polypyrrole (PPy) shell was prepared. The synthesis procedure involved a condensation reaction between PPI surface primary amine ... -
Synthesis of mesoporous akaganeite functionalized maize cob biochar for adsorptive abatement of carbamazepine: Kinetics, isotherms, and thermodynamics
(Elsevier, 2022-09-01)In this work, akaganeite (β-FeO(OH)) impregnated maize cob biochar (Fe-MCB) was prepared by direct hydrolysis, and its adsorptive potential was tested against aqueous solutions of carbamazepine (CBZ), an emerging contaminant. ... -
Synthesis of stationary phases that provide group recognition for polychlorinated biphenyls by porogenic fragment template imprinting
(WILEY, 2015)Molecular recognition based on imprinted polymers results from the polymerization of functional monomers and cross-linkers in the presence of a target analyte (i.e. template), with subsequent removal of the template to ... -
A Three-Step Nonparametric Estimation of Conditional Value-At-Risk Admitting a Location-Scale Model
(Journal of Statistical and Econometric Methods, 2019)Financial institutions owners and regulators are concerned majorly about risk analysis, Value-at-Risk (VaR) is one of the most popular and common measures of risk used in finance, measures the down-side risk and is ... -
Unsteady hydromagnetic flow between parallel plates both moving in the presence of a constant pressuregradient
(International Journal of Engineering Science and Innovative Technology, 2017)An unsteady magneto hydrodynamicviscous incompressible electrically conducting fluid flow between two parallel porous plates of infinite length in xand zdirections subjected to a constant pressure gradient in the presence ... -
Unsteady MHD Free Convective Flow Past an Inclined Parabolic Accelerated Plate with Hall Current, Radiation Effects and Variable Temperature in a Porous Medium
(International Journal of Management and Fuzzy Systems, 2017)We analyze the effects of hall current and radiation on unsteady hydromagnetic free convection flow of a viscous incompressible electrically conducting fluid past an inclined parabolic accelerated plate in a ... -
Using Conditional Extreme Value Theory to Estimate Value-at-Risk for Daily Currency Exchange Rates
(Scientific Research Publishing Inc., 2017)This paper implements different approaches used to compute the one-day Value-at-Risk (VaR) forecast for a portfolio of four currency exchange rates. The concepts and techniques of the conventional methods considered in ... -
Using Conditional Extreme Value Theory to Estimate Value-at-Risk for Daily Currency Exchange Rates
(IOP Publishing, 2017)This paper implements different approaches used to compute the one-day Value-at-Risk (VaR) forecast for a portfolio of four currency exchange rates. The concepts and techniques of the conventional methods considered in ... -
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 ... -
Vehicular Traffic Flow Model with Driver Aggresiveness Component in a Multilane Road
(Journal of Applied and Computational Mathematics, 2016)In this study, we outline the Kerner’s 3-phase traffic flow theory, which states that traffic flow occurs in three phases and these are free flow, synchronized flow and wide moving jam phases. A macroscopic traffic flow ... -
Volatility Estimation of Stock Prices using Garch Method
(European Journal of Business and Management, 2015)Economic decisions are modeled based on perceived distribution of the random variables in the future, assessment and measurement of the variance which has a significant impact on the future profit or losses of particular ... -
Zn and Pb marking of Ca binding to humic substances and PHREEQC speciation simulations
(IWA Publishing, 2016)Power generating companies using and recycling cooling water usually experience deposition of insoluble salts on pipes carrying the water, leading to scaling problems. By controlling parameters that optimize competitive ...