Browsing Faculty of Science & Technology (FST) by Title
Now showing items 2861-2880 of 4283
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Optimal vaccination strategies in periodic settings: An orbital stability analysis
(University of Nairobi.School of Mathematics, 2013)We analyse a periodically driven SIR epidemic model for childhood related diseases, where the contact rate and vaccination rate parameters are considered periodic. The aim is to define optimal vaccination strategies for ... -
Optimisation of ethanol yield from cassava
(Centre For Biotechnology & Bioinformatics Publications, 2009) -
Optimised germination protocol for jackfruit seeds and evaluation of methods for extraction of DNA suitable for genetic analysis
(JPPS, 2022-08-18)Jackfruit (Artocarpus heterophyllus) is an underutilised plant that is promising in curbing food and nutritional security in sub-Saharan Africa. However, high level of secondary metabolites in its tissues significantly ... -
Optimization of acid activation conditions for Athi River Bentonite clay and application of the treated clay in palm oil bleaching
(2014)Athi River bentonite clay was activated using Sulphuric acid at various acid concentrations, clay-acid ratio, temperature and contact times. Optimization was based on palm oil bleaching performance. the chemical compositions ... -
Optimization of C/N ratio for Mesophilic anaerobic digestion from food wastes found in Nairobi a lab-scale case study
(University of Nairobi, 2016)Extensive work has been done on Anaerobic digestion of single substrates and using codigestion. In a number of cultures around the world, the wastes that are discarded as household waste may not easily fit in the biogas ... -
Optimization of enzymatic conversion of maize stover to bioethanol
(Centre For Biotechnology & Bioinformatics Publications, 2009) -
Optimization of essential oil extraction from eucalyptus grandis leaves by clevenger distillation
(University of Nairobi, 2016)Abstract : Recent statistics have shown a rise in the margin of consumption and utilization of essential oils, over the past years this has been marked by a divergence in the dependence of allophaticallopathic ... -
Optimization of fuzzy evapotranspiration model through neural training with input-output examples
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2001)In a previous study, we demonstrated that fuzzy evapotranspiration (ET) models can achieve accurate estimation of daily ET comparable to the FAO Penman-Monteith equation, and showed the advantages of the fuzzy approach ... -
Optimization of Narrow Band-Gap Propylenedioxythiophene:Cyanovinylene Copolymers for Optoelectronic Applications
(Department of Chemistry, University of Nairobi, 2006)Four analogues of the narrow band gap poly(3,4-propylenedioxythiophenedialkyl)cyano-p-phenylenevinylene (PProDOT−R2:CNPPV) polymer family have been designed with the goal of improving the film forming ability and utility ... -
Optimization of parameters for study of heavy metals in biological samples
(University of NairobiCollege of biological and physical science, 1996)In this work parameters such as AAS/CVAAS delay time, pH, digestion matrix, mercury reducing agents, sensitivity complexing time for XRF analysis and digestion temperature have been considered. The results demonstrates ... -
Optimization Of X-ray Fluorescence Elemental Analysis: An Example From Kenya
(University of Nairobi, 1998-07)A systematic study and application of a radioisotope excited energy dispersive X-ray fluorescence analysis method to multi-elemental determination in Kenyan rock samples whose supporting matrices are of light elements is ... -
Optimization of X-ray Fluorescence Elemented analysis.an example from Kenya
(Department of Physics, University of Nairobi., 1998)A systematic study and application of a radioisotope excited energy dispersive X-ray fluorescence analysis method to multi-elemental determination in Kenyan rock samples whose supporting matrices are of light elements is ... -
Optimizing Neural Network for TV Idle Channel Prediction in Cognitive Radio Using Particle Swarm Optimization
(University of NairobiCollege of biological and physical science, 2013) -
Optimum two stage group-screening designs
(School of Mathematics, 1984)In this paper, emphasis has been given to both the expected number of runs and the expected number of incorrect decisions and two stage group-screening designs have been obtained which minimise one fixing the other or ... -
Optimum two stage group-screening with unequal group sizes and with errors in decisions
(School of Mathematics, 1987)In this paper, the formula for the expected number of incorrect decisions has been obtained. It is assumed that the factors are defective with different a-priori probabilities. Group-screening designs have been described ... -
Optoelectronic Properties of F-co-doped PTO Thin Films Deposited by Spray Pyrolysis
(University of Nairobi, 2013)F-co-doped Palladium Tin Oxide (PTO) thin films were pyrolytically deposited on glass substrate at 4500 C using an alcoholic precursor solution consisting of Tin (IV) Chloride (SnCl4.5H2O), Palladium Chloride (PdCl2) ... -
Optoelectronic property refinement of FASnI3 films for photovoltaic application
(University of Nairobi, 2021)Tin (Sn) is a promising substitute for lead (Pb) in organic–inorganic hybrid halide perovskite-photovoltaic devices, but it is prone to delivering low power conversion efficiencies (PCEs) due to the poor quality of ... -
Organic acid production and digesta movement in the gastrointestinal tract of the baboon and sykes monkey
(University of Nairobi, 1980)1. Studies compare the sites of organic acid production and patterns of digesta movement in herbivorous and omnivorous sub-human primates. The results of this study indicate that digestive functions of the herbivorous Sykes ... -
Organic binders to enhance fuel efficiency of charcoal (Jikos) and in water filters
(University of Nairobi, 2013-12)This work presents experimental and theoretical study of the effect of a plant bidder (corchirus olitorius) on the thermal shock resistance and thermal con: of kaolinite-based refractories. Shock-induced crack growth, ... -
Organic content and X-ray density of lacustrine sediments from Hausberg Tarn, Mount Kenya
(University of Nairobi.Department of Geology, University of Nairobi, Nairobi, Kenya, 2004)The variations in the organic content of a sediment core from a pro-glacial lake, Hausberg Tarn, located on the NW slope of Mount Kenya has been determined. Two types of methods for determining organic content were compared ...