Browsing School of Pure and Applied Sciences by Title
Now showing items 98-117 of 170
-
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 ... -
Prediction of Compressive Strength of Calcined Clay Based Cement Mortars Using Support Vector Machine and Artificial Neural Network Techniques
(Research Gate, 2020)Prediction of strength in cement based materials is vital in construction industry as it forms the basis upon which important tasks can be performed such as the time for mortar form removal, project scheduling and quality ... -
Prediction of the likelihood of Households Food Security in the Lake Victoria Region of Kenya
(Pakistan Journal of Statistics and Operation Research, 2011)This paper considers the modeling and prediction of households food security status using a sample of households in the Lake Victoria region of Kenya. A priori expected food security factors and their measurements are ... -
Preparation and Chemical/Microstructural Characterization of Azacrown Ether-Crosslinked Chitosan Films
(Multidisciplinary Digital Publishing Institute, 2017)Chemically stable porous azacrown ether-crosslinked chitosan films were prepared by reacting varying molar amounts of N,N-diallyl-7,16-diaza-1,4,10,13-tetraoxa-dibenzo-18-crown-6 (molar equivalents ranging from 0, 0.125, ... -
Preparation of tervalent molybdenum complexes and a study of their reduction by zinc under low pressure of carbon monoxide
(Kenyatta University, 2011)Previously, molybdenum hexacarbonyl, MO(CO)6 has been prepared by reduction of highoxidation state molybdenum compounds such as MoCls under high pressure (60-100atm.) and temperature (20-1000C), carbonylation of metal oxide ... -
Pricing of European call options using generalized Wishart processes
(Mathematics and Systems Science, 2023)This study explores a multiple-security, high-risk pricing model where the implied volatility has been portrayed through Generalized Wishart affine processes. The presence of dual dependency matrices distinctively characterizes ... -
Pyroprocessing and the Optimum Mix Ratio of Rice Husks, Broken Bricks and Spent Bleaching Earth to Make Pozzolanic Cement
(Elsevier, 2019)This paper presents the findings of an experimental investigation on optimizing pozzolanic activity of a blend of Rice Husks (RH), Spent Bleaching Earth (SBE) and Broken Bricks (BB) to form pozzolana that would have ...