School of Biological, Physical, Mathematics & Actuarial Sciences: Recent submissions
Now showing items 201-220 of 246
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Evaluation of seasonal variation of MODIS derived leaf area index at two European deciduous broadleaf forest sites
(Elsevier, 2005)We present an evaluation of the operational MODIS Leaf Area Index (LAI) product over two temperate deciduous forests and focus on the seasonal variation. Two EUROFLUX beech (Fagus sylvatica) sites, Hesse, France and Sorø, ... -
An ethnobotanical study of medicinal plants used by the Nandi people in Kenya
(Elsevier, 2007)Ethnopharmacological relevance The study of local knowledge about natural resources is becoming increasingly important in defining strategies and actions for conservation or recuperation of residual forests. Aims of the ... -
Finite element approach to the solution of fourth order beam equation
(IJESM, 2013-06)Finite element method is a class of mathematical tool which approximates solutions to initial and boundary value problems. Finite element, basic functions, stiffness matrices, systems of ordinary differential equations and ... -
Finite difference solution of (2+1)-dimensional sine-gordon equation: A model for investigating the effects of varying surface damping parameter on josephson current flowing through the long josephson junction
(International Journal of Science and Research (IJSR), 2015)Modeling of some physical phenomena and technological processes taking into account dissipation leads to the Sine-Gordon equation with the first time derivative. The (2+1) Sine-Gordon equation with the first time derivative ... -
Finite difference solution of (1+1) sinegordon equation: A mathematical model for the rigid pendula attached to a stretched wire
(The SIJ Transactions on Computer Science Engineering & its Applications (CSEA), 2015-04)The nonlinear (1+1) Sine-Gordon equation that governs the vibrations of the rigid pendula attached to a stretched wire is solved. The equation is discretized and solved by Finite Difference Method with specific initial and ... -
Morphometric study of Senna didymobotrya (Fresen.) H. S. Irwin and Barneby in Kenya
(Journal of Natural Sciences Research, 2017)Herbal medicine has been used for many years and it remains widespread in developing countries while the use of complementary alternative medicine is increasing rapidly in developed countries. Senna didymobotrya is important ... -
Forensic estimation of time of death: A mathematical model
(International Journal of Management, IT and Engineering, 2013-07)In this paper we establish the exact time of death of a murdered person. This leads to an ordinary differential equation whose solution has been analyzed to provide the approximate time of death. Forensic expert will try ... -
Occurrence of nodulation in leguminous trees in Kenya
(Journal of Tropical Microbiology and Biotechnology, 2005)Exploitation of the potential for nitrogen fixing trees, soil improvement and multipurpose use, requires a good knowledge of their nodulation capabilities and agrosilvicultural manipulation. Nitrogen Fixation in some ... -
Mathematical model for co-infection of HIV/AIDS and pneumonia with treatment
(International Journal of Scientific Engineering and Applied Science, 2016)Pneumonia occurs commonly in HIV-infected patients. In this paper, we study a simple mathematical model for the co-infection of HIV/AIDS and Pneumonia. We establish that the model is well presented epidemiologically and ... -
Morphological, genetic and symbiotic characterization of root nodule bacteria isolated from Bambara groundnuts (Vigna subterraneaL. Verdc) from soils of Lake Victoria basin, western Kenya.
(Journal of Applied Biology and Biotechnology, 2015)Low soil nitrogen (N) is a major constraint for sustainable crop production in smallholder farming systems in Africa. Grain legumes such as bambara groundnuts (Vigna subterraneaL. Verdc). can form N fixing symbiotic ... -
Functions of multi-pendula system spatial motion
(Published by The Standard International Journals, 2017)A study has been done using generalized coordinates system with the application of the Lagrangian formalism for n mass units linearly connected to move in space. Lagrangian equations have been developed and used throughout ... -
Competition in Kenyan soils between Rhizobium leguminosarum biovar phaseoli strain Kim5 and R. tropici strain CIAT899 using the gusA marker gene
(Kluwer Academic Publishers, 1998-07)The contribution of appropriate inoculum strains to more efficient nitrogen fixation by legumes has been difficult to assess due to the laborious nature of the assays involved in assessing establishment of inoculum strains ... -
Derivation and solution of the heat equation in 1-D
(International Journal of Engineering, Science and Mathematics, 2013)Heat flows in the direction of decreasing temperature, that is, from hot to cool. In this paper we derive the heat equation and consider the flow of heat along a metal rod. The rod allows us to consider the temperature, ... -
Diversity of Rhizobia Nodulating Phaseolus vulgaris L. in two Kenyan soils with contrasting pHs.
(American Society for Microbiology, 1995)Rhizobia were isolated from two Kenyan soils with pHs of 4.5 and 6.8 and characterized on the basis of their host ranges for nodulation and nitrogen fixation, colony morphologies, restriction fragment fingerprints, and ... -
Two dimensional mathematical models for convective-dispersive flow of pesticides in porous media
(International Journal of Engineering Science and Computing, 2016)The transport of solutes through porous media where chemicals undergo adsorption or change process on the surface of the porous materials has been a subject of research over the years. Use of pesticides has resulted in ... -
Mathematical model for nutrient exchange across the placenta
(2015)This study presents a new mathematical model for nutrient exchange across the placenta which include nutrient exchange from foetus to mother to provide a system of equations in the form, Y ሶ ൌ AY rԦሺtሻ and whose solution ... -
Mathematical modeling of insulin therapy in patients with diabetes mellitus
(2015)This study presents a Mathematical Model Insulin Therapy in Patients with Diabetes Mellitus which includes external rate at which blood glucose, insulin and epinephrine are being increased in the form, Y =AY+r (t) and ... -
The algebra of smooth functions of rapid descent
(2009)A bounded operator with the spectrum lying in a compact set V ⊂ R, has C∞ (V) functional calculus. On the other hand, an operator H acting on a Hilbert space H, admits a C(R) functional calculus if H is self-adjoint. So ... -
Extraction of zero coupon yield curve for Nairobi securities exchange: finding the best parametric model for East African securities markets
(Science Signpost Publishing, 2015)We seek to construct a zero coupon yield curve (ZCYC) for Nairobi Securities Exchange (NSE). The objective of this paper is to construct a ZCYC that is differentiable at all points and at the same time, produces continuous ... -
Teachers` gender and primary school pupils` achievement in mathematics in Kenya
(Journal of Education and Practice, 2013)This descriptive causal comparative study examined the relationship between teacher’s gender and in primary schools pupils’ performance in mathematics in Kenya. The study objective was to investigate the effect of teachers’ ...