Browsing School of Pure and Applied Sciences by Title
Now showing items 199-218 of 259
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Participatory investigations of bovine trypanosomiasis in Tana River District, Kenya
(Blackwell Science Ltd, 2002-04-04)Participatory research on bovine trypanosomiasis was conducted with Orma pastoralists in Tana River District, Kenya. The use of participatory methods to understand local perceptions of disease signs, disease causes, disease ... -
Performance Comparison between the Traditional Intensity Modulation Direct Detection and Coherent Detection in a High Speed Optical Fibre Communication System
(2015)Passive optical networks (PONs) have become a dominant approach for the fibreto–the-home (FTTH) network deployments. Reliable and spectral efficient technologies are a necessity for extending the unamplified transmission ... -
Performance of a horizontal well in a bounded anisotropic reservoir: Part II: Performance analysis of well length and reservoir geometry
(De Gruyter Open Access, 2023-06)Evaluation of the performance of horizontal wells is an important aspect in the enhancement of their productivity. This study provides mathematical computations, and analysis for theoretical well and reservoir considerations. ... -
The Performance of Step-Wise Group Screening Designs
(Sultan Qaboos University, 2015)In this paper we evaluate the performance of step-wise group screening designs in which group-factors contain an equal number of factors in the initial step. A usual assumption in group screening designs is that the ... -
Photometric sensing of heavy metal ions using a naphthoquinodimethyl-bis-thioamide dye: Selectivity & photophysics of the metal organic complexes
(Elsevier, 2022)As Mother Nature is experiencing catastrophic environmental pollutions from both natural sources and anthropogenic activities, many scientists have been working around the clock to develop environmentally benign and ... -
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 ...