School of Pure and Applied Sciences: Recent submissions
Now showing items 81-100 of 259
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Intensification of Agriculture as the Driving Force in the Degradation of Nzoia River Basin: the Challenges of Watershed Management
(2007)The Lake Victoria riparian countries suffer from devastating effects of floods and droughts occasioned by severe weather related natural phenomena. The floods often follow prolonged droughts that have become a mark of ... -
Isolation and Identification of Hexazinone-Degrading Bacterium from Sugarcane-Cultivated Soil in Kenya
(Springer US, 2014)The s-triazine herbicide hexazinone [3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4(1H,3H)- dione], is widely used in agriculture for weed control. Laboratory biodegradation experiments for hexazinone in ... -
Degradation characteristics of metribuzin in soils within the Nzoia River Drainage Basin, Kenya
(Taylor & Francis, 2016)Metribuzin, a triazinone herbicide, is heavily used within the expansive Nzoia River Drainage Basin in Kenya for the optimization of sugarcane yields. For field experiments, soils were spiked with metribuzin and amended ... -
Comparison of lead levels with calcium, zinc and phosphorus levels in human blood
(European Centre for Research Training and Development UK, 2013)The purpose of the study was to determine how the levels of calcium, phosphorus and zinc affected the levels of lead in the human blood. The levels of lead, calcium, zinc and phosphorus in human blood of subjects from ... -
The dissipation and degradation of methoxy‐ 14C malathion in soil under tropical conditions
(Taylor & Francis Group, 2000)l4C-malathion[S-1,2-bis(ethoxycarbonyl) ethyl O,O-dimethyl phosphorodithioate] has been studied in soil under tropical field conditions by applying the 14C-malathion pesticide to soil in Polyvinyl chloride (PVC) pipes ... -
Biodegradation of phenylurea herbicide diuron by microorganisms from long-term-treated sugarcane-cultivated soils in Kenya
(Taylor & Francis, 2011)The phenylurea herbicide diuron [N-(3,4-dichlorophenyl)-N,N-dimethylurea] is widely used alone or in a broad range of herbicide formulations. Its degradation in sugarcane-cultivated soils which have been impacted by the ... -
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 ... -
MATHEMATICAL MODELLING OF HIV INFECTION
(2013)We formulate a deterministic mathematical model for the HIV/AIDS -
On Local Linear Regression Estimation in Sampling Surveys
(Pushpa Publishing House, 2017)A model based survey is employed to estimate the unknown values of the survey variable, using the local linear regression approach. In particular, a local linear regression estimator in model based surveys is studied. ... -
Mathematical Model for Detecting Diabetes in the Blood
(2011)This study presents a new mathematical model for Blood Glucose Regulatory System(BGRS) which includes epinephrine as a third variable in the form, Y˙ = AY, and whose solution has been analyzed for equilibrium and stability ... -
Impedimetry and microscopy of electrosyntheticpoly(propylene thiophenoimine)-co-poly(3,4 ethylenedioxythiophene) dendritic star copolymer
(International Journal of Electrochemical Science, 2011)The electrochemical impedance spectroscopy of generation 2 poly(propylenethiophenoimine)-co-poly(3,4 ethylene dioxythiophene) dendritic star copolymer(G2PPT-co-PEDOT) film was studied in LiClO4solution. The results show ... -
Robust Optimal Portfolio and Bank Capital Adequacy Management
(Research India Publications, 2018)The task of jointly estimating an optimal portfolio and bank capital adequacy ratio under model uncertainties is a real and challenging problem to portfolio managers in the banking industry. In this paper, we investigate ... -
LÉVY PROCESS BASED ORNSTEIN-UHLENBECK TEMPERATURE MODEL WITH TIME VARYING SPEED OF MEAN REVERSION
(Pushpa Publishing House, 2018)In this study we develop a Lévy process driven Ornstein-Uhlenbeck daily temperature model. The model takes into account a time dependent speed of mean reversion. It is statistically demonstrated that historical data and ... -
A Levy Regime-Switching Temperature Dynamics Model for Weather Derivatives
(2018)Weather is a key production factor in agricultural crop production but at the same time, the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production ... -
A Co-Integration Analysis of the Interdependencies between Crude Oil and Distillate Fuel Prices
(Scientific Research Publishing, 2018)The co-evolution and co-movement of financial time series are of utmost importance in contemporary finance, especially when considering the joint behaviour of asset price realizations. The ability to model interdependencies ... -
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 ... -
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 ... -
Analyzing Expected Returns of a Stock Using The Markov Chain Model and the Capital Asset Pricing Model
(2017)The chances of success of an investor in the stock market depends heavily on the decisions he takes based on his knowledge of the behavior of the stock market. In this study, the behavior of a stock on the Nigerian stock ... -
Foreign Exchange Derivative Pricing with Stochastic Correlation
(Scientific Research Publishing, 2016)Financial markets are known to be far from deterministic but stochastic and hence time dependent correlation tends to suit the markets. We price for European Options by using three dimensional assets under stochastic ... -
ANALYSIS OF THE CONSUMERS’ SWITCHING BEHAVIOR FOR DIGITAL SET TOP BOXES IN KENYA
(DBA Africa Management Review, 2016)We determine the consumers’ selection criteria and explore the effectiveness of selected attitudinal, behavioral and demographic variables in discriminating between switchers and continuers of particular digital set ...
