Browsing School of Pure and Applied Sciences by Title
Now showing items 31-50 of 259
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Bootstrap of Kernel Smoothing in Quantile Autoregression Process
(Journal of Statistical and Econometric Methods, 2013)The paper considers the problem of bootstrapping kernel estimator of conditional quantiles for time series, under independent and identically distributed errors, by mimicking the kernel smoothing in nonparametric autoregressive ... -
Bootstrap Uniform Confidence Bands for A Local Linear Nonparametric Estimator and Applications to Financial Risk Management
(2012)This paper considers the problem of bootstrapping a local linear estimator in conditional quantile estimation of a financial time series assuming independent and identically distributed errors. A nonparametric ... -
Broadband quarter-wave plate based on dielectric-embedded plasmonic metasurface
(Royal Society of Chemistry, 2017)High transmission plasmonic and all-dielectric metasurface wave plates have been reported in recentstudies. However, narrow bandwidth and low polarization conversion need to be addressed to attaineven better operation ... -
Capture, isolation and electrochemical detection of industrially-relevant engineered aerosol nanoparticles using poly (amic) acid, phase-inverted, nano-membranes
(Elsevier, 2014-08-30)Workplace exposure to engineered nanoparticles (ENPs) is a potential health and environmental hazard. This paper reports a novel approach for tracking hazardous airborne ENPs by applying online poly (amic) acid membranes ... -
Car Antifreeze and Coolant: Comparing Water and Ethylene Glycol as Nano Fluid Base Fluid
(2018-06)Most internal combustion engines are fluid cooled using liquid coolants mostly water and ethylene glycol, whose heat transfer capabilities are limited. An alternative for improving their thermophysical properties is the ... -
Catalytic Reduction of Hexavalent Chromium using Nanostructured Polyamic Acid
(American Chemical Society, 2014)This paper provides a survey of conventional and emerging techniques that are available for characterizing engineered nanoparticles in complex matrices. Techniques that were considered include microscopy (TEM, SEM, HRTEM, ... -
Characterization of antibiotic resistance in environmental enteric pathogens from Kibera slum in Nairobi-Kenya
(Academic Journals, 2012)Kibera slum is characterized by poor sanitation hence the frequent outbreaks of diarrheal diseases. Emergence of antibiotic resistance by diarrhoea-causing bacteria is an inevitable challenge in the area. Diarrhea-causing ... -
Chemical Characteristics, with particular reference to phosphorus, of the rivers draining into Lake Naivasha, Kenya
(School of Biological Sciences, 2002)Macrophytes have been shown to perform important ecological roles in Lake Naivasha. Consequently, various studies regarding the impact of biotic factors on the macrophytes have been advanced but related studies on environmental ... -
A class of multi-phase traffic theories for microscopic,kinetic and continuum traffic models
(Computers and Mathematics with Applications, 2013)In the present paper are view and numerical comparison of a special class of multi-phase traffic theories based on microscopic, kinetic and macroscopic traffic models is given.Macroscopic traffic equations with multi-valued ... -
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 ... -
Comparative limnology, species diversity and biomass relationship of zooplankton and phytoplankton in five freshwater lakes in Kenya
(Springer, 1994)Comparative studies on the limnology, species diversity and standing stock biomass of phytoplankton and zooplankton in five freshwater lakes, Naivasha and Oloidien, Ruiru, Masinga and Nairobi reservoirs, were undertaken. ... -
Comparative studies in electrochemical degradation of sulfamethoxazole and diclofenac in water by using various electrodes and phosphate and sulfate supporting electrolytes
(Taylor and Francis, 2016-06)In this study, the electro-oxidation capacities of Na2SO4 and potassium phosphate buffer supporting electrolytes were tested and compared for destruction of the sulfamethoxazole (SMX) and diclofenac (DCF) on platinum (Pt) ... -
Comparing macrophyte herbivory by introduced Louisiana crayfish (Procambarus clarkii) (Crustacea: Cambaridae) and native Dytiscid beetles (Cybister tripunctatus) (Coleoptera: Dytiscidae), in Kenya
(2005)The omnivorous Louisiana crayfish, Procambarus clarkii, has caused significant changes to macrophyte communities worldwide and may have similar negative effects in Kenya if used as a biological control agent for snails ... -
Comparison of Godunov’s and Relaxation Schemes Approximation of Solutions to the Euler Equations
(Journal of Applied Mathematics and Bioinformatics, 2015)In this paper we deal with the study of Euler equations for isothermal gas that is governed by two hyperbolic equations. By analysing the equations we obtain two real and distinct eigenvalues which enables ... -
Comparison of Godunov’s and Relaxation Schemes Approximation of Solutions to the Traffic Flow Equations
(International Journal of Scientific and Innovative Mathematical Research, 2014)In this paper we deal with the study of the traffic flow model that is governed by two hyperbolic equations. By analysing the equations we obtain two real and distinct eigen values which enables us to determine the wave ... -
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 ... -
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 ... -
Conditional CAPM in Financial Risk Management: A Quantile Autoregression approach
(2012)The study aims to provide a comprehensive description of dependence pattern of a stock by studying a range of betas derived as quantiles of conditional return distribution using quantile regression based on moving window ... -
Conditional Dependence Modellingwith Regular Vine Copulas
(Journal of Statistical and Econometric Methods, 2019)Modelling sophisticated high-dimensional dependence structures forfinancial assets in a portfolio framework require flexible dependencemodels. In this paper, a regular vine-copula based model is employed toanalyze financial ... -
Conditional scale function estimate in the presence of unknown conditional quantile function
(African Network of Scientific and Technical Institutions (ANSTI), 2005)Standard approach for modeling and understanding the variability of statistical data or, generally, dependant data, is often based on the mean variance regression models. However, the assumptions employed on standardized ...