Browsing School of Pure and Applied Sciences by Title
Now showing items 179-198 of 259
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Nonparametric Estimates for Conditional Quantiles of Time Series
(2014)We consider the problem of estimating the conditional quantile of a time series fYtg at time t given covariates Xt , where Xt can either exogenous variables or lagged variables of Yt . The conditional quantile is ... -
Nonparametric Estimation of the Error Functional of a Location-Scale Model
(Scienpress Ltd, 2018-10-01)Two estimators of the distribution of the error term are proposed based on nonparametric regression residuals; considering a heteroscadastic location-scale model where the mean and variance functions are smooth, and the ... -
Nonparametric Mixed Ratio Estimator for a Finite Population Total in Stratified Sampling
(2018)We propose a nonparametric regression approach to the estimation of a finite population total in model based frameworks in the case of stratified sampling. Similar work has been done, by Nadaraya and Watson (1964), Hansen ... -
A numerical analysis of unsteady inflow wind for site specific vertical axis wind turbine: A case study for Marsabit and Garissa in Kenya
(Elsevier, 2014)Most of the wind analysis studies have been conducted under steady wind conditions. The study of real unsteady wind environment, however, is still an open-ended research question. This is attributable to the existing ... -
Numerical and experimental study of pressure-wave formation around an underwater ventilated vehicle
(Elsevier, 2017)The objective of this study was to understand better the ventilated cavitation flow structure around an underwater ventilated vehicle. A high-speed camera system was used to observe the cavity evolution of unsteady ... -
Numerical Solution for a Model on Cancer Growth Reduction Using both Chemotherapy and Radiotherapy
(Research India Publications, 2019)Using mathematical models to simulate dynamic biological processes has a long history. In this study, we have employed mathematical modeling to understand the behavior of cancer and its interaction with both chemotherapy ... -
A numerical solution to estimate hydro-geologic parameters of a fractured geothermal porous medium based on fluorescein thermal decay correction
(Elsevier, 2014-07)A numerical solution to model the flow of fluorescein tracer in a fractured, high temperature geothermal system is presented. This study was carried out in Olkaria, Kenya. Results show that correcting for fluorescein ... -
On Changepoint Detection in a Series ofStimulus-Response Data
(2017)n this paper, we demonstrate the power of functional data models for a statistic al analysis of stimulus-response experiments which is a quite natural way to look at this kind of data and which makes use of the full ... -
On Derivation of the Probability of Occurrence of an Epidemic with Application to HIV/AIDS Spread Given Tuberculosis Co-infections in the Presence of Treatment
(Science Journal of Applied Mathematics and Statistics, 2017)Human Immunodeficiency Virus (HIV) and Mycobacterium Tuberculosis (TB) infections are two major world’s public health problems especially in developing countries. Worldwide, 13% of TB cases are estimated to be co-infected ... -
ON LOCAL LINEAR REGRESSION ESTIMATION IN SAMPLING SURVEYS
(Far East Journal of Theoretical Statistics, 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. ... -
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. ... -
On Local Linear Regression Estimation of Finite Population Totals in Model Based Surveys
(American Journal of Theoretical and Applied Statistics, 2018)In this paper, nonparametric regression is employed which provides an estimation of unknown finite population totals. A robust estimator of finite population totals in model based inference is constructed using the procedure ... -
On Local Linear Regression Estimation of Finite Population Totals in Model Based Surveys
(American Journal of Theoretical and Applied Statistics, 2018) -
On the Estimation and Properties of Logistic Regression Parameters
(IOSR Journal, 2014)Logistic regression is widely used as a popular model for the analysis of binary data with the areas of applications including physical, biomedical and behavioral sciences. In this study, the logistic regression model, ... -
Optimal Investment Strategy under Stochastic Interest Rates
(Scientific Research Publishing, 2017)We study how firms’ management can make effective investment decision under the influence of random interest rates. We define the threshold interest rate value below which investment can be effectively done and above ... -
Optimal threshold determination based on the meanexcess plot
(Taylor and Francis Group, 2019)Choosing a suitable threshold has been an issue in practice. Based on the mean excess plot (MEP), the eyeball inspection approach(EIA) is mainly used to determine the threshold. This involves fitting the threshold at the ... -
Optimization of Oyster Mushroom Yield By Using Simplex-Centroid Mixture Design
(Journal of Scientific Research and Innovative Technology, 2020)Despite the increased recognition of the nutritional value of the Oyster mushroom, coupled with its ability to tolerate a wide range of climatic conditions, its production is still at infancy stage with low adoption rate ... -
Organochlorine pesticide residues in sediment and water from NairobiRiver, Kenya: levels, distribution, and ecological risk assessment
(Environmental Science and Pollution Research, 2018)Production and use of most organochlorine pesticides (OCPs) was banned through the Stockholm Convention on persistentorganic pollutants. However, appreciable amounts are still detected in the environment due to their ... -
Organochlorine Pesticides Residues in Lake Naivasha Catchment Water
(2017)Lake Naivasha, Kenya, hangs precariously in balance between economic exploitation and biodiversity conservation. There is increasing intensity of horticultural activities around the lake, believed to result in excessive ...