School of Biological, Physical, Mathematics & Actuarial Sciences: Recent submissions
Now showing items 221-240 of 254
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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’ ... -
Attitudes of students and teachers towards use of computer technology in Geography education
(2010)The ability to display simulated environments through the computer may make it a stimulating instructional tool for illuminating abstract concepts in Geography. In Kenya, there is persistent lack of resources to improve ... -
New synthetic pathways for thiocarbohydrazide and salicylaldehyde azine compounds
(Asian Journal of Chemical Sciences, 2017)Thiocarbohydrazide synthesis is an important intermediate step for many hydrazine organic synthetic reactions. Synthesis of thiocarbohydrazide can be done by reaction of carbon disulfide with hydrazine (hydrazinolysis) ... -
On local minimum and orthogonality of normal derivations in Cp-classes
(G.I publications, 2017-02)The present paper gives some results on local minimum and orthogonality of normal derivations in Cp-Classes. We employ some techniques for normal derivations due to Mecheri, Hacene, Bounkhel and Anderson. Let CpCp be normal, ... -
On numerical ranges of convexoid operators
(G.I publications, 2017-02)Numerical range is useful in studying operators on Hilbert spaces. In particular, the geometrical properties of numerical range often provide useful information about algebraic and analytic properties of an operator. The ... -
Characterization of the late embryogenesis abundant (LEA) proteins family and their role in drought stress tolerance in upland cotton
(2018)Late embryogenesis abundant (LEA) proteins are large groups of hydrophilic proteins with major role in drought and other abiotic stresses tolerance in plants. In-depth study and characterization of LEA protein families ... -
2-butanone as a carbon dioxide mimic in attractant blends for the Afrotroical malaria mosquitoes anopheles gambie and anopheles funestus
(Malaria Journal, 2017-08-24)Most odour baits designed to attract host-seeking mosquitoes contain carbon dioxide (CO2), which enhances trap catches, given its role as a mosquito fight activator. However, the use of CO2 is expensive and logistically ... -
The inter-play of the opto-electrical properties of cuprite and tenorite semiconductors for solar cell application
(American Journal of Nano Research and Applications, 2017)The electrical and optical properties of cuprous oxide (Cu2O) thin films prepared by D.C. reactive magnetron sputtering technique have been systematically studied. The influence of the film deposition conditions on the ... -
Implication of pollen character coding and their diagnostic value in the determination of taxonomic resemblance among indigofera linn species
(International Journal of Life Sciences Research, 2017)Whereas phenetics emphasizes the use of maximum characters as practicable, decisions on how observations are translated to characters is of importance in systematics in order to partition objects in to nonoverlapping ... -
Technological tools for sustainable development in developing countries: The example of Africa, a review
(Elsevier, 2017-10)Abstract The development of Africa including industrialization such as chemical production, urbanization, agriculture, waste disposal, and electric power generation has a direct and diverse effect on the environment. These ... -
Effect of climatic variability on malaria trends in Baringo County, Kenya
(Malaria Journal, 2017-05-25)Malaria transmission in arid and semi-arid regions of Kenya such as Baringo County, is seasonal and often influenced by climatic factors. Unravelling the relationship between climate variables and malaria transmission ... -
Malaria vector species distribution and seasonal population dynamics across varied ecological zones in Baringo County, Kenya
(Journal of Mosquito Research, 2017)Vector populations fluctuate on a seasonal basis annually. Knowledge on seasonal abundance and distribution of vector species at the local level would improve vector control programmes and contribute to malaria prevention. ... -
QTL mapping of fiber quality and yield-related traits in an intra-specific upland cotton using genotype by sequencing (gbs)
(International Journal Molecular Science, 2018-02)Fiber quality and yield improvement are crucial for cotton domestication and breeding. With the transformation in spinning techniques and multiplicity needs, the development of cotton fiber quality and yield is of great ...
