School of Science and Computing (JA): Recent submissions

Now showing items 1-20 of 845

Genetic origins and climate-induced erosion in economically important Asian walnuts

Fan, Peng-Zhen; Zhu, Guang-Fu; Wambulwa, Moses C.; Milne, Richard I.; Wu, Zeng-Yuan; Luo, Ya-Huang; Shavvon, Robabeh S.; Jump, Alistair S.; Maity, Debabrata; Gao, Lian-Ming; Qi, Hai-Ling; Wu, Hong-Yu; Kong, Xing; Khan, Raees; Yan, Li-Jun; Turuspekov, Yerlan; Li, De-Zhu; Liu, Jie (2025-08-20)

The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation ...
Mathematical model of cholera transmission with education campaign and treatment through quarantine

Nyaberi, H. O.; Malonza, David M. (2019-05-20)

Cholera, a water-borne disease characterized by intense watery diarrhea, affects people in theregions with poor hygiene and untreated drinking water. This disease remains a menace to publichealth globally and it indicates ...
Maize edible-legumes intercropping systems for enhancing agrobiodiversity and belowground ecosystem services

Jalloh, Abdul A.; Mutyambai, Daniel M.; Yusuf, Abdullahi A.; Subramanian, Sevgan; Khamis, Fathiya (Nature Research, 2024-06-12)

Intensifcation of staple crops through conventional agricultural practices with chemical synthetic inputs has yielded positive outcomes in food security but with negative environmental impacts. Ecological intensifcation ...
Insect frass fertilizer upregulates maize defence genes and resistance against an invasive herbivore pest

Mutyambai, Daniel M.; Mutua, Johnstone M.; Jalloh, Abdul A.; Beesigamukama, Dennis; Kessler, Andre; Subramanian, Sevgan; Dubois, Thomas; Ekesi, Sunday; Tanga, Chrysantus M. (Nature Research, 2025-08-15)

The black soldier fly frass fertilizer (BSFFF) has gained global attention as a multipurpose input for soil fertilization and pest and disease management. However, there are limited studies that have examined its effects ...
Normal forms for coupled takens-bogdanov systems

Malonza, David M. (Taylor and Francis, 2004-04-27)

The set of systems of differential equations that are in normal form with respect to a particular linear part has the structure of a module of equivariants, and is best described by giving a Stanley decomposition of that ...
Mathematical model for crimes in developing countries with some control strategies

Mataru, Bilali; Abonyo, Okelo J.; Malonza, David M. (Wiley, 2023-02-07)

Crime is one among the most challenging problems in most developing countries in which unemployment is among the causes. Not all kind of crimes can be eradicated indeed; this paper is intended to contribute on eradication ...
On the spectrum of some infinite matrix as an operator on the sequence space c\(_0\)

Ochieng, Godrick F.; Akanga, Jotham; Wali, Augustus N. (2025)

In various papers some authors have previously investigated (Brown et al. 1965; Wenger 1975; Deddens 1978; Rhoads 1983; Reade 1985) and determined the spectrum of weighted mean matrices considered as bounded operators on ...
Hybrid approximation of solutions of integral equations of the hammerstein type

Zegeye, Habtu; Malonza, David M. (2012-12-18)

Let X be a uniformly convex and uniformly smooth real Banach space with dual X∗. Let F : X → X∗ and K : X∗ → X be continuous monotone operators. Suppose that the Hammerstein equation u + KFu = 0 has a solution in X. It is ...
Optimal cost-effectiveness analysis of a mathematical model of climate change induced by excessive emission of carbon dioxide

Achimugwu, Peter U.; Kinyanjui, Mathew N.; Malonza, David M. (2023-10-24)

The current crisis of global climate change and its consequences which are manifested in form of different environmental disasters is attributed to excessive emission and accumulation of greenhouse gases in the atmosphere, ...
Modeling the effects of insecticides resistance on malaria vector control in endemic regions of Kenya

Wairimu, Josephine; Chirove, Faraimunashe; Ronoh, Marilyn; Malonza, David M. (Elsevier, 2018-12)

We present a model to investigate the effects of vector resistance to control strategies. The model captures the development of resistance as well as loss of resistance in mosquitoes and how these affect the progress in ...
Modelling and optimal control of typhoid fever disease with cost-effective strategies

Tilahun, Getachew T.; Makinde, Oluwole D.; Malonza, David M. (2017)

We propose and analyze a compartmental nonlinear deterministic mathematical model for the typhoid fever outbreak and optimal control strategies in a community with varying population. The model is studied qualitatively ...
Modelling and optimal control of pneumonia disease with cost-effective strategies

Tilahun, Getachew T.; Makinde, Oluwole D.; Malonza, David M. (Taylor and Francis, 2017-06-14)

We propose and analyse a nonlinear mathematical model for the transmission dynamics of pneumonia disease in a population of varying size. The deterministic compartmental model is studied using stability theory of differential ...
Non-local operator as a mathematical tool to improve the modeling of water pollution phenomena in environmental science: A spatio-temporal approach

Soh, Pasquini F.; Kinyanjui, Mathew; Malonza, David M.; Kiogora, Roy (Elsevier, 2025-06)

This paper aims to develop a fractional order mathematical model addressing water pollution dynamics. The model is designed to elucidate the effect of pollutants and propose effective strategies for mitigating their spread ...
Co-dynamics of pneumonia and typhoid fever diseases with cost effective optimal control analysis

Tilahun, Getachew T.; Makinde, Oluwole D.; Malonza, David M. (Elsevier, 2018-01-01)

In this paper, we propose and analyze a mathematical model for Pneumonia–Typhoid co-infection to examine their characteristic relationship due to preventive and treatments strategies. Firstly, we qualitatively analyzed the ...
An improved theory of asymptotic unfoldings

Murdock, James; Malonza, David M. (Elsevier, 2009-08-01)

An asymptotic unfolding of a dynamical system near a rest point is a system with additional parameters, such that every one-parameter deformation of the original system can be embedded in the unfolding preserving all ...
A mathematical model of the dynamics of coffee berry disease

Nyaberi, H. O.; Mutuku, W. N.; Malonza, David M.; Gachigua, G. W. (Wiley, 2023-09-27)

Coﬀee berry disease (CBD) is a fungal disease caused by Colletotrichum kahawae. CBD is a major constraint to coﬀee productionto Kenya and Africa at large. In this research paper, we formulate a mathematical model of the ...
The implications of HIV treatment on the HIV-malaria coinfection dynamics: A modeling perspective

Nyabadza, F.; Bekele, B. T.; Rúa, M. A.; Malonza, David M.; Chiduku, N.; Kgosimore, M. (Wiley, 2015-09-06)

Most hosts harbor multiple pathogens at the same time in disease epidemiology. Multiple pathogens have the potential for interaction resulting in negative impacts on host fitness or alterations in pathogen transmission ...
A model for childhood pneumonia dynamics

Ngari, Cyrus G.; Malonza, David M.; Muthuri, Grace G. (2014-06-04)

This paper presents a deterministic model for pneumonia transmission and uses the model to assess the potential impact of therapy. The model is based on the Susceptible-Infected-Treatment-Susceptible compartmental structure ...
Hybrid approximation of solutions of nonlinear operator equations and application to equation of hammerstein-type

Ofoedu, Eric U.; Malonza, David M. (Elsevier, 2011-03-01)

In this paper we study hybrid iterative scheme for finding a common element of set of solutions of generalized mixed equilibrium problem, set of common fixed points of finite family of weak relatively nonexpansive mapping ...
Application of Markov chain model to analysis and prediction of green gram price transitions in Kitui county, Kenya

Ndengele, Richard T.; Mutwiri, Robert M.; Odhiambo, Fredrick O. (Asian journal of probability and statistics, 2025-07-04)

This study investigated the stochastic price dynamics of green grams in Kitui County, Kenya, aiming to analyze and predict price movements using a Markov chain model. Employing monthly price data from January 2012 to ...

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