ABSTRACT The boundary layer flow, heat and mass transfer in a quiescent nanofluid driven by a continuous stretching sheet is significant in numerous engineering and industrial processes. Nanofluids posses enhanced thermo physical properties which make them more superior than convectional fluids. This study investigates numerically heat and mass transfer of asteady laminar,viscous incompressible electrically conducting micro polar nanofluid past a porous medium and over a sheet that is stretc...
ABSTRACT Consider the problem of r t / randomly distributed points in a unit n-ball and the convex hull created by these points. Let ~ 11 be r.t times the r-content of an rsimplex whose p vertices are in the interior and r + /- p vertices on the boundary of a unit n-ball. Explicit expressions for the exact distribution functions of ~,, are given when r 1 / points are independently, and identically distributed according to the Uniform distribution. The exact distributions are obtained using t...
ABSTRACT Automatic control systems penneate life in all advanced societies today. Such systems act as catalysts in promoting progress and development. They are integral components of any industrial society and are necessary for the production of standardized and quality goods. Suitable signal plans at each road intersections can be used to solve the problem of traffic :flow. These plans could be fixed-time, time varying, or traffic actuated. Traffic control systems have evolved during the 20...
ABSTRACT The erratic pattern of rainfall over the years coupled with increasing population has left no option but to cultivate more farmlands through irrigation to meet food demand. Irrigated Agriculture as essential as it is if not done with care through good practices and use of quality water can lead to soil salinization and ecological unsustainability. In Kenya a lot of irrigated lands have been abandoned after few years of cultivation due to salinization. This study was carried out to a...
ABSTRACT Cassava (Manihot esculenta, Crantz) is an important perennial tropical crop for millions of people around the world particularly in Sub-Saharan Africa. It is preferred due to its agronomical attributes such as ability to grow in poor soils and drought resistance. Cassava storage roots are also a good source of starch. In addition, cassava leaves and tender shoots are eaten as vegetables in many parts of Africa, Kenya included and are an excellent source of vitamins, minerals and pro...
ABSTRACT Tuberculosis, an air-borne infectious disease, remains a major threat to public health in Kenya. In this study we derived a system of non-linear ordinary differential equations from SLICR mathematical model of TB to study the effects of hygiene consciousness as a control strategy against TB in Kenya. The effective basic reproduction number (R0) of the model was determined by the next generation matrix approach. We established and analysed the equilibrium points. Using the Routh-Hurw...
ABSTRACT Multiple imputation procedure is used in handling of item non-response. The imputation procedure is affected by model misspecification and leads to loss in efficiency and biased results. The inclusion of auxiliary variables in the sampling design helps to avoid sensitivity of inference to model misspecification and improves the precision of estimate of population mean. The main aim of this study was to incorporate auxiliary variables in the Multiple Imputation to improve the accurac...
ABSTRACT Nutritional quality of market samples of some fruit drinks were assessed through laboratory analysis. The assessment covered the determination of quality parameters of six brands of fruits drinks which include California brands of orange and pineapple drinks, orange and pineapple fruta drinks and 5 – alive orange and pineapple drinks. The assessment indices included the determination of proximate compositions, mineral composition and vitamin composition of the drinks. From the res...
ABSTRACT Thaumatococcus daniellii and Musa accuminata are leaves used for wrapping foods and these herbs have some medicinal value. The affordability, preservation, usage techniques, and seasonal scarcity of the leaves make it difficult for people to use them frequently but they are preferred over plastic bags and aluminum foil in terms of wrapping edible foods like beans pudding (moi-moi), agidi, etc and fresh foods like uncooked meat, vegetables etc. This research work involved phytochem...
ABSTRACT Adansonia digitata has popular ethnomedicinal application in the treatment of malaria in sub-Saharan Africa. The present study sought to investigate the antimalarial and antioxidant effects of methanol and flavonoid-rich extracts of the stem bark on Plasmodium berghei-infected mice in vivo. Thirty-five male mice, weighing 18-20 g and randomly allocated into seven groups of five animals each were used. Group 1, which served as the positive control, was pretreated with 1 ml/kg of the ...
ABSTRACT Type 2 diabetes mellitus (T2DM) is a chronic progressive disease that has continued to be a global heath and economic burden. Acarbose is an antidiabetic drug, which acts by inhibiting alpha amylase and alpha glucosidase; while gallic acid is a simple phenolic acid that is widespread in plant foods and beverages such as tea and wine.This study therefore, sought to investigate the influence of gallic acid on α-amylase and α-glucosidase inhibitory and antioxidant properties of acarb...
ABSTRACT Social engineering is one of the most common attacking vectors in mobile money transactions. With the increasing rate of mobile money use, it has directly increased the number of social engineering incidents in mobile money services. It is therefore important to evolve a framework for detecting malicious and phishing messages. This could help to reduce threats posed by mobile phone criminals. As of now, some customers and agents have already lost thousands of shillings due to social...
Among other atmospheric region, ionosphere, which is the ionized region of the atmosphere, is considered to impose serious limitation on radio wave transmission while the effect of other layers, more especially, the troposphere is often treated as negligible. At higher frequency, radio waves pass through the ionosphere and are attenuated due to the free electrons present in it. However, recent studies have shown that while the ionospheric disturbances can be predicted on a global scale, trop...
The concentrations of Ni, Mn, Cd, Cu, Zn, Pb and Cr, were determined in some pastas consumed in Nigeria, with a view to providing information on the dietary intakes of heavy metals and exposure of humans to toxic metals. The concentrations of these seven (7) elements were determined by atomic spectrometry after nitric acid/perchloric acid digestion. The concentrations of the metals (µg/g) in the locally manufactured pasta samples were in the following ranges: Ni (0.109 - 0.344); Mn (0.377 - ...
Rampant cyber incidences in Kenya targeting banks call for mediations beyond existing cybersecurity principles. This quantitative study sought to collate multi-domain variables from previous works to develop a framework for measuring cyber-resilience in Kenyan banks known as the Cyber-resilience Framework for Banks (CRF4Banks). The framework consists of eight key cyber-resilience constructs and their constituent variables, identified from empirical research and literature. Cyber-resilien...