• ELECTROCOAGULATION METHOD FOR COLOUR REMOVAL IN TEA EFFLUENT: A CASE STUDY OF CHEMOMI TEA FACTORY IN RIFT VALLEY, KENYA 

  Justin K. Maghanga; Fred K. Segor; Lazare Etiégni; John Lusweti (Chemical Society of Ethiopia, 2009)

  A simple and efficient electrochemical method that utilizes two steel electrodes and is capable of reducing the colour of tea effluent prior to its discharge into the river system has been developed. The effects of potential ...
• Polycyclic Aromatic Hydrocarbon Gaseous Emissions from Household Cooking Devices: A Kenyan Case Study 

  Chiedza F. Munyeza; Aloys M. Osano; Justin K. Maghanga; Patricia B.C. Forbes (Environmental Toxicology and Chemistry, 2019)

  In developing countries, household energy use is highly variable and complex, yet emissions arising from fuel combustion indoors are typically poorly quantified. Polycyclic aromatic hydrocarbons (PAHs) are emitted during ...
• Phosphorus sorption and lime requirements of maize growing acid soils of Kenya 

  P. O. Kisinyo; C. O. Othieno; SO Gudu; J. R. Okalebo; P. A. Opala; JR Okalebo; PA Opala; J. K. Maghanga; W. K. Ng’etich; J. Agalo; R. W. Opile; J. A. Kisinyo; B. O. Ogola (Sustainable Agriculture Research, 2013)

  In Kenya, maize (Zea mays L.) is mainly grown on acid soils in high rainfall areas. These soils are known for low available phosphorus (P), partly due to its sorption by aluminium (Al) and iron oxides. The study ...
• Impact of Nitrogen Fertilizer Applications on Surface Water Nitrate Levels within a Kenyan Tea Plantation 

  J. K. Maghanga; J. L. Kituyi; P. O. Kisinyo; W. K. Ng’etich (Journal of Chemistry, 2013)

  Tea production in the Kenyan Ri Valley uses high rates of nitrogenous fertilizer. Nitrates can be discharged to water bodies through leaching and surface run-off. Nitrate levels above 10 mg/L NO3−–N cause methemoglobinemia ...
• Effects of lime, phosphorus and rhizobia on Sesbania sesban performance in a Western Kenyan acid soil 

  P. O. Kisinyo; S. O. Gudu; C. O. Othieno; J. R. Okalebo; P. A. Opala; J. K. Maghanga; J. J. Agalo; W. K. Ng'etich; J. A. Kisinyo; R. J. Osiyo; A. O. Nekesa; E. T. Makatiani; D. W. Odee; B. O. Ogola (African Journal of Agricultural Research, 2012)

  Aluminium (Al) toxicity, phosphorus (P) deficiency and low rhizobia populations limit Sesbania (Sesbania sesban) performance in tropical acid soils. The study determined the i) indigenous rhizobia populations that nodulate ...
• Occurrence and ingestion of microplastics by zooplankton in Kenya's marine environment: first documented evidence 

  L Ojwang; J Maghanga; J Kamau; A Kimeli; J Omukoto; N Ngisiag’e; J Mwaluma; H Ong’ada; C Magori; E Ndirui (African Journal of Marine Science, 2018)

  Microplastics can be ingested by marine organisms and may lead to negative impacts at the base of marine food chains. This study investigated the occurrence and composition of microplastics in the sea-surface water and ...
• MUTUA’S FORMULA: THE LAND SURVEYING AREA SOLVER 

  SAMUEL FELIX MUTUA; MUTUA NICHOLAS MUTHAMA; MUTUA NICHOLAS MUNG’ITHYA (ASIAN JOURNAL OF MATHEMATICS AND APPLICATIONS, 2013)

  Land surveying has been a challenge for many years both in developed and developing countries. For instance the triangular survey consumes a lot of time as several sides of the field need to be measured. Solutions to ...
• Aim Error bound theorems Numerical experiment Results Conclusions On Multi-Domain Polynomial Interpolation Error Bounds 

  Mutua Samuel; PROF. S.S. MOTSA (Applied Mathematics, 2016)
• MUTUA’S METHOD: PARTICULAR POLYNOMIAL AND COEFFICIENTS OF PARTICULAR INTEGRALS OF THE FORMcxn eAx 

  Samuel Felix Mutua (ASIAN JOURNAL OF MATHEMATICS AND APPLICATIONS, 2013)

  In many problems involving solutions to ordinary differential equations, students and researchers in the field of applied mathematics are faced with challenges of obtaining the particul ar integrals. In particular, when ...
• COMPUTATIONAL AND NUMERICAL ANALYSIS OF DIFFERENTIAL EQUATIONS USING SPECTRAL BASED COLLOCATION METHODS 

  Mutua Samuel (University of KwaZulu-Natal, Durban South Afrcia, 2019)

  In this thesis, we develop accurate and computationally efficient spectral collocation-based methods, both modified and new, and apply them to solve differential equations. Spectral collocation-based methods are the most ...
• https://www.researchgate.net/profile/Victor-Kaigalula-2/publication/378683845_Soret_and_Dufour_Effects_on_MHD_Fluid_Flow_Through_a_Collapssible_Tube_Using_Spectral_Based_Collocation_Method/links/65e441c0adf2362b636830c2/Soret-and-Dufour-Effects-on-MHD-Fluid-Flow-Through-a-Collapssible-Tube-Using-Spectral-Based-Collocation-Method.pdf 

  Victor Kaigalula; Samuel Mutua (Applied and Computational Mathematics, 2024)

  This paper examine numerical study for soret and dufour effects on unsteady Newtonian MHD fluid flow with mass and heat transfer in a collapsible elastic tube using Spectral Collocation technique. The objective of the ...
• Magneto-hydrodynamic flow of an incompressible fluid in a collapsible elastic tube with mass and heat transfer 

  Victor Kaigalula; econia Okelo; Samuel Mutua; Onesmus Muvengei (Journal of Applied Mathematics and Physics,, 2023)

  The aim of this study is to examine unsteady incompressible Magnetohy- drodynamic fluid flow together with soret and dufour effects on mass and heat transfer through a collapsible elastic tube. The governing equations ...
• A highly accurate trivariate spectral collocation method of solution for two-dimensional nonlinear initial-boundary value problems 

  Mutua Samuel; S.S. Motsa (Applied Mathematics and Computation, 2019)

  In this paper, we propose a new numerical method namely, the trivariate spectral collo- cation method for solving two-dimensional nonlinear partial differential equations (PDEs) arising from unsteady processes. The ...
• AN EVALUATION OF INFORMATION LITERACY INITIATIVES: A CASE STUDY OF TAITA TAVETA UNIVERSITY LIBRARY 

  Willy Maghanga Kisingo (UoN institutional repository, 2021)

  Information Literacy (IL) skills are integral in today’s information society. Efforts and initiatives put in place have a great impact on how Information Literacy skills are imparted to the targeted population. The aim ...
• AMOUD-G FAMILY OF LIFETIME DISTRIBUTIONS: PROPERTIES, HAZARD-BASED REGRESSION MODELS AND APPLICATIONS TO SURVIVAL DATA 

  Abdisalam Hassan MUSE; Samuel MWALILI; Oscar NGESA (International Conference on Mathematics and Its Applications in Science and Engineering (ICMASE 2022), 2022)

  In this article, we introduce a new family of lifetime distributions with one extra shape parameter, called the Amoud-G family, based on the cumulative hazard rate function, the well-known concept in survival and reliability ...
• MISSPECIFICATION OF FRAILTY RANDOM EFFECTS IN A CLUSTERED SURVIVAL DATA. 

  Kiche J; Oscar Ngesa; George Orwa (Journal of Statistical and Econometric Methods, 2019)

  Survival analysis models the time it takes until an event occurs. The prototypical event is death, from which the name survival analysis is derived.Accordingly, each time survival analysis is studied, aspects of some ...
• Exponentiated Nadarajah Haghighi Poisson Distribution 

  Diouma Sira KA; George Otieno Orwa; Oscar Ngesa (International Journal of Statistics and Probability, 2019)

  This paper discusses the Exponentiated Nadarajah-Haghighi Poisson distribution focusing on statistical properties such as the Quantile, Moments, Moment Generating Functions, Order statistics and Entropy. To estimate the ...
• A Comparative Study of Bayesian Stochastic Search Variable Selection Approach in Multiple Linear Regression 

  Christabel Nyanchama Bisonga; Oscar Owino Ngesa; Martine Odhiambo Oleche (International Journal of Mathematics Trends and Technology, 2022)

  The presence of insignificant predictors in models causes estimation bias and reduces prediction precision. Collinearity among predictors is a common problem that renders the design matrix unstable leading to unreliable ...
• THE EXTENDED EXPONENTIAL-WEIBULL ACCELERATED FAILURE TIME MODEL WITH APPLICATIONS TO CANCER DATA SET 

  Adam Braima MASTOR; Oscar NGESA; Joseph MUNGATU; Ahmed Z. AFIFY (International Conference on Mathematics and Its Applications in Science and Engineering, 2022)

  To model time-to-event data, the Weibull, log-logistic, and log-normal distributions are commonly utilized. Only monotone hazard rates are accommodated by the Weibull family, although log-logistic and log-normal are ...
• A FLEXIBLE FAMILY OF DISTRIBUTIONS BASED ON THE ALPHA POWER FAMILY OF DISTRIBUTIONS AND ITS APPLICATION TO SURVIVAL DATA 

  Veronica Kariuki; Anthony Wanjoya; Oscar Ngesa; Mohammed Alqawba (Pak. J. Statist., 2023)

  In this paper, we propose a flexible family called the exponentiated alpha-power-G (EAP-G) family. The benefits of the proposed family include its analytical simplicity and its ability to confer flexibility to the baseline ...

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