Browsing School of Pure and Applied Sciences by Title
Now showing items 92-111 of 170
-
A numerical investigation of the effect of curvature and Reynolds number to radial velocity in a curved porous pipe
(International Journal of Advances in Applied Mathematics and Mechanics, 2017)Different irrigation methods are being used in agriculture. However, due to scarcity of water, irrigation methods that use water efficiently are needed. The motivation of this study is the increasing use of porous pipes ... -
On Estimation of Panel Data Regression Model in the Presence of Endogeneity and Heterogeneity
(International Journal of Mathematics & Computation, 2015) -
On quantiles estimation based on stratified sampling using multiplicative bias correction approach.
(Journal of Mathematics, 2022)In the context of stratified sampling, we develop a nonparametric regression technique to estimating finite population quantiles in model-based frameworks using a multiplicative bias correction strategy. Furthermore, the ... -
On The Existence of a Non-Relativistic Hermitian Time Operator
(2015)The existence of a hermitian time operator is proposed in the framework of non-relativistic quantum mechanics. The Heisenberg equation of motion is shown to yield constant rate of flow of time. It is shown to yield results ... -
Optical properties of ZnO nanoparticles synthesized by varying the sodium hydroxide to zinc acetate molar ratios using a Sol-Gel process.
(Springer, 2016)Material property dependence on the OH−/Zn2+ molar ratio of the precursor was investigated by varying the amount of NaOH during synthesis of ZnO. It was necessary to control the water content and temperature of the mixture ... -
Outlier Robustness of the Estimators of Variance of the Ratio Estimator
(Jomo Kenyatta University of Agriculture and Technology (JKUAT), 2002) -
Parallel evolution of hysterothecial ascomata in ascolocularous fungi (Ascomycota, Fungi).
(The Natural History Museum, 2009-12-01)Ascoma morphologies have traditionally been used to classify filamentous ascomycete fungi. Phylogenies generated using DNA sequence data have since shown most of the previously identified groups not to be monophyletic. The ... -
Parameter Estimation of Power Lomax Distribution Based on Type-II Progressively Hybrid Censoring Scheme
(HIKARI Ltd, 2018)In this study, we consider the parameter estimation of a three-parameter continuous distribution, namely, power Lomax distribution proposed by [7], when the lifetime experiments are under Type-II Progressively Hybrid ... -
Parametric Modeling of Probability of Bank Loan Default in Kenya
(JAGST, 2012)Commercial banks in Kenya are the key players not only in the financial market but also in spurring the economic growth that has been witnessed in the country in the recent past. Besides Safaricom and East Africa Breweries, ... -
Performance of Ground Clay Brick Mortars in Simulated Chloride and Sulphate Media
(Hindawi, 2019)The durability of cement-based structures majorly depends on their resistivity to the aggressive media in the construction environment. The most aggressive ions commonly encountered in construction environment are chloride ... -
Photo-Thermal Induced Optical Scattering Modulation Sensor for Malaria Diagnosis
(Scientific Research Publishing, 2018-09)Malaria is one of the leading killer diseases in sub-Saharan Africa. Although the disease is curable, early and accurate diagnosis is key to effective therapy. Existing malaria diagnostic techniques have low detection ... -
Phylogenetic studies uncover a predominantly African lineage in a widely distributed lichen-forming fungal species
(MycoKeys, 2016)A number of lichen-forming fungal species are widely distributed. Here, we investigate biogeographic patterns in a widely distributed isidiate taxon –Parmelinella wallichiana – using molecular sequence data. Our results ... -
Physico-Chemical Properties of Kenyan made Calcined Clay-Limestone Cement (LC3).
(Elsevier, 2020)In Kenya fired clay bricks are mainly used as construction materials. However, vast quantities of these Fired Rejected Clay Bricks (FRCB) generated are rejected annually as a result of improper calcination or demolition ... -
Physicochemical Performance of Portland-Rice Husk Ash-Calcined Clay-Dried Acetylene Lime Sludge Cement in Sulphate and Chloride Media
(ResearchGate GmbH, 2019)This paper reports leach and/or intake of SO42−, Cl−, Ca2+, Na+, and K+ from and/or into cement mortar cubes made from a novel cementious material in naturally encountered environmental simulated media. The paper also ... -
Physicochemical Properties of Hydrated Portland Cement Blended with Rice Husk Ash
(Hindawi, 2020)In the presence of significant quantities of carbon dioxide (CO2) and elevated temperatures in the atmosphere due to climate change, cement-based materials are susceptible to carbonation. Blended cements are more prone to ... -
Poisson Incorporated Credibility Regression Modelling of Systematic Mortality Risk for Populations with Finite Data
(Hindawi, 2021-12-21)This study considered the modeling of systematic mortality risk for populations with finite data using the Poisson incorporated Credibility regression model. For novelty, we have included the credibility regression approach ... -
Polyphyly of the genus Canoparmelia—uncovering incongruences between phenotype-based classification and molecular phylogeny within lichenized Ascomycota (Parmeliaceae)
(PHYTOTAXA, 2016)Many phenotypical features traditionally used to classify genera in Parmeliaceae and in lichens in general have evolved several times independently, potentially limiting their taxonomic utility. Here, we aim to elucidate ... -
The Possibility of Angle Trisection (A Compass-Straightedge Construction)
(Journal of Mathematics and System Science, 2017)The objective of this paper is to provide a provable solution of the ancient Greek problem of trisecting an arbitrary angle employing only compass and straightedge (ruler).(Pierre Laurent Wantzel, 1837) obscurely presented ... -
Potential for Selected Kenyan Clay in Production of Limestone Calcined Clay Cement
(Springer, 2020)The potential for calcined clay, and in particular Limestone Calcined Clay Cement (LC3), to be used in concrete in Kenya was examined in this study. Locations of clay sources and existing mining infrastructure were examined ...