Research and Publications: Recent submissions
Now showing items 1061-1080 of 1138
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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 ... -
Signal monitoring and performance stability evaluation tool in a high speed optical communication network
(Elsevier, 2016)The diverse communication systems in South Africa have changed drastically over the last few years and are envisioned to continue to improve as evidenced by the deployment of high speed optical fibre networks, in both ... -
Comparison of Three Solid Phase Materials for the Extraction of Carboxylic Acids from River Water Followed by 2D GC × GC-TOFMS Determination
(Hindawi Publishing Corporation, 2016)The extraction and determination of aliphatic and aromatic carboxylic acids as well as their influence on the aromaticity and molecularity relationship of natural organic matter (NOM) in water are reported in this study.Three ... -
Experimental and Theoretical Characterization of Metal Complexation with Humic Acid
(2016)This study investigated the bonding of calcium and magnesium to specific sites in humic acid as a function of pH, temperature, and trace metal concentrations. Other metals were investigated but not in detail. Using a ... -
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 ... -
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 ... -
A Fumonisins Immunosensor Based on Polyanilino-Carbon Nanotubes Doped with Palladium Telluride Quantum Dots
(2014-12-24)An impedimetric immunosensor for fumonisins was developed based on poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes doped with palladium telluride quantum dots onto a glassy carbon surface. The composite was assembled ... -
Multi-walled carbon nanotubes: innovative sorbents for pre-concentration of polychlorinated biphenyls in aqueous environments
(RSC, 2015-07-21)Carbon nanotubes (CNTs) have demonstrated outstanding chemical and mechanical stability, electrical properties, and strong interactions with aromatic compounds owing to the p-electron system on the graphene sheets. Taking ... -
An alternative clean-up column for the determination of polychlorinated biphenyls in solid matrices
(RSC, 2015-11)The need for continuous monitoring of polychlorinated biphenyls (PCBs) has necessitated the development of analytical techniques that are sensitive and selective with minimal reagent requirement. In light of this, ... -
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 ... -
Molecularly imprinted polymers for the analysis and removal of polychlorinated aromatic compounds in the environment: a review
(RSC, 2016)Synthetic receptors and in particular molecularly imprinted polymers (MIPs) are gaining relevance as selective sorbent materials and biomimetic recognition elements for analyzing polychlorinated aromatic compounds (PACs) ... -
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 ... -
An Application Of Extreme Value Theory In Modelling Electricity Production In Kenya
(IISTE, 2014)Extreme Value Theory provides a well-established statistical model for the computation of extreme risk measure which includes, Value at Risk and Expected Shortfall. In this paper we apply Univariate Extreme Value Theory ... -
Measuring Financial Risk in Stock Returns: A Case of Nairobi Stock Exchange
(International Journal of Science and Research (IJSR), 2014-04)Value-at-Risk is an important concept in financial management, financial reporting and risk management. In this study, we have used this tool to assess risk in stocks listed in the Nairobi Stock Exchange. It is commonly ... -
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, ... -
Conditional Volatility Estimation by Conditional Quantile Autoregression
(HIKARI Ltd, 2014)This paper considers the problem of estimating conditional volatility function using conditional quantile autoregression function. We estimate the interquantile autoregression range and the conditional volatility function ... -
Assessment of photo-oxidative alterations to natural organic matter in water using fluorescence excitation emission matrices and liquid chromatography-organic carbon detection techniques
(RSC, 2015)Fluorescence excitation emission matrices (FEEMs) and liquid chromatography-organic carbon detection (LC-OCD) are relatively novel techniques currently used for analysing natural organic matter (NOM) in water. Regardless ... -
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 ... -
MODELLING THE VOLATILITY OF EXCHANGE RATES IN RWANDESE MARKETS
(European Centre for Research Training and Development UK, 2014-12)This work applied Generalized Autoregressive Conditional Heteroskedasticity (GARCH) approach to modelling volatility in Rwanda Exchange rate returns. The Autoregressive (AR) model with GARCH errors was fitted to the daily ...
