Browsing School of Pure and Applied Sciences by Title
Now showing items 204-223 of 259
-
A Poisson-Gamma Model for Zero Inflated Rainfall Data
(Hindawi, 2018)Rainfall modeling is signifcant for prediction and forecasting purposes in agriculture, weather derivatives, hydrology, and risk and disaster preparedness. Normally two models are used to model the rainfall process as a ... -
A Poisson-Gamma Model for Zero Inflated Rainfall Data
(Hindawi, 2018)Rainfall modeling is significant for prediction and forecasting purposes in agriculture,weather derivatives,hydrology,and risk and disaster preparedness.Normally two models are used to model the rainfall process as a chain ... -
Polarization Converter with Controllable Birefringence Based on Hybrid All-Dielectric-Graphene Metasurface
(Nanoscale Research Letters, 2018)Previous studies on hybriddielectric-graphenemetasurfaceshavebeenusedtoimplementinducedtransparency devices,while exhibiting high Q-factors based on trapped magnetic resonances.Typically,the transparencywindows are ... -
Polarization independent and tunable plasmoninduced transparency for slow light
(Royal Society of Chemistry, 2017)A novel metamaterial composed of a Ag nanoprism periodic tetramer is proposed in this paper. Themetamaterial has high structural symmetry and shows polarization independent plasmon-inducedtransparency (PIT), demonstrated ... -
Prediction of the Likelihood of Households Food Security in the Lake Victoria Region of Kenya
(2011)This paper considers the modeling and prediction of households food security status using a sample of households in the Lake Victoria region of Kenya. A priori expected food security factors and their measurements are ... -
Predictive complexation models of the impact of natural organic matter and cations on scaling in cooling water pipes: A case study of power generation plants in South Africa
(Elsevier, 2014)This work discusses simulative models of Ca and Mg complexation with natural organic matter (NOM), in order to control the incidence of scaling in pipes carrying cooling water at the Eskom power generating stations in ... -
PREGNANCY OUTCOME IN WOMEN PRESENTING WITH OBSTRUCTED LABOUR IN A RURAL HOSPITAL, KENYA
(2015)Background: Obstructed labour still remains a life – threatening catastrophe all over the world but mostly in the developing countries. This, entirely preventable labour complication carrying a very high maternal and ... -
Pricing Interest Rate Caps and Floors under the Pearson-Sun Interest Rate Model
(2018)Interest rate derivatives are largely used to manage interest rate risk. For this reason, the accuracy of their pricing is very important as mispricing can result in huge financial losses. In this study, the Pearson-Sun model, ... -
Pricing floating strike lookback put option under heston stochastic volatility
(International Research Publication House, 2017)The pricing problems of the exotic options in the finance do not have the analytic solutions under stochastic volatility and so it is difficult to calculate the option prices or at least it requires much of time to compute ... -
Reactivity, Characterization of Reaction Products and Immobilization of Lead in Water and Sediments using Quercetin Pentaphosphate
(RSC, 2016)Lead is currently ranked the number one heavy metal pollutant with maximum contaminant level (MCL) of 0.015 mg/L. The use of organicsolvent free methods to immobilize lead from the environment is attracting the attention ... -
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 ... -
A Reduced Form of the Three Factor Commodity Derivative Valuation Model
(Research India Publications, 2016)This study build a reduced form of three factor valuation model by explicitly taking into account the unobservable character of the convenience yield. The spot priceprocess,theinstantaneousconvenienceyieldandCIRinterestr ... -
Reduction and Degradation of Paraoxon in Water Using Zero-Valent Iron Nanoparticles
(MDPI, 2022-08-02)Paraoxon is an emerging organophosphate pollutant that is commonly used as a pesticide and a drug, hence increasing the risk of contamination of water supplies. Its intensive use for vector control has led to pollutions ... -
Reduction of Hexavalent Chromium Using Naturally-Derived Flavonoids
(American Chemical Society, 2012)Quercetin is a naturally occurring flavonoid that is known to form complexes with metals; a process that reduces the environmental availability of toxic metals such as chromium. We hereby report the first evidence of the ... -
Refined node polynomials via long edge graphs
(2015)The generating functions of the Severi degrees for sufficiently ample line bundles on algebraic surfaces are multiplicative in the topological invariants of the surface and the line bundle. Recently new proofs of this fact ... -
Regime-Switching Temperature Dynamics Model for Weather Derivatives
(Hindawi, 2018)Weather is a key production factor in agricultural crop production and at the same time the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production ... -
A residual-based bootstrap for functional autoregressions
(arXiv preprint, 2019)We consider the residual-based or naive bootstrap for functional autoregressions of order 1 and prove that it is asymptotically valid for, e.g., the sample mean and for empirical covariance operator estimates. As a crucial ... -
Residue levels and dis charge loads of antibiotics in waste water treatment plants (WWTPs), hospital lagoons, and rivers within Lake Victoria Basin, Kenya
(Environ Monit Assess, 2016)The detection of antibiotics in water systems has instigated great environmental concern due to the toxicological effects associated with these compounds. Their discharge into the environment results from the ubiquity of ... -
Residue levels and discharge loads of antibiotics in wastewater treatment plants (WWTPs), hospital lagoons, and rivers within Lake Victoria Basin, Kenya
(Springer International Publishing Switzerland, 2015-12)The detection of antibiotics in water systems has instigated great environmental concern due to the toxicological effects associated with these compounds. Their discharge into the environment results from the ubiquity ...