College of Natural Sciences (CoNAS): Recent submissions
Now showing items 161-180 of 340
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Solutions to a non-linear Diophantine equation of Pillai type
(Makerere University, 2022-04-07)Let $ \{F_n\}_{n\geq 0} $ be a sequence of Fibonacci numbers defined by $$ F_{0}=0, ~ F_{1}=1 ~~ \text{and} ~~ F_{n} = F_{n-1}+ F_{n-2} ~~ \text{for} ~~ n\geq 2. $$ In this research, we find all integers $c$ with at least ... -
Geological assessment of heavy metals' soil contamination by drilling waste discharge, Palogue Fields, Melut Basin, South Sudan
(Makerere University, 2022-03-31)Oil and gas operations produce wastes that are potentially toxic to the environment. The waste deposited into reserve pits can contaminate soil, groundwater, and surface water with heavy metals and other toxic substances ... -
Assessment of polycyclic aromatic hydrocarbons in the breast milk of mothers from Kampala capital city, Uganda
(Makerere University, 2022)The aim of this study was to investigate levels of polycyclic aromatic hydrocarbons (PAHs) in breast milk samples from healthy mothers who have lived in Kampala capital city (urban and industrialized area) for more thancarcin ... -
Optimization of the electrical resistivity of magnetron sputtered Aluminium and Boron co-doped zinc oxide thin films for solar cells
(Makerere University, 2022)The aim of this research was to optimize the electrical resistivity of transparent Al-B co- doped ZnO thin films for application as a transparent front electrode in thin film solar cells, as a cheaper alternative to the ... -
Molecular phylogeny, taxonomy and distribution of Chlorophytum Ker-Gawl. (Asparagaceae) in Uganda
(Makerere University, 2022-03)The study aimed to establish the phylogeny, review the taxonomic circumscription and establish the current distribution of Chlorophytum species in Uganda. Seventy districts were surveyed between June 2019 and January ... -
The use of Splines for solving ill-posed problems, with application to the Cauchy problems for the Heat and Helmholtz equations.
(Makerere University, 2022-03-22)Inverse heat conduction: The Cauchy problem for the heat equation is a model of situation where one seeks to compute the temperature, or heat-flux, at the surface of a body by using interior measurements. The problem is ... -
Prediction of daily global solar radiation on a horizontal surface in Uganda using artificial neural networks.
(Makerere University, 2022-02-03)In this research a five parameter artificial neural network model was developed to predict daily global solar radiation on a horizontal surface using input variables that include; sunshine hours, maximum temperature, minimum ... -
Performance Analysis of Bukuzindu Hybrid Power Plant in Kalangala District of Uganda
(Makerere University, 2022-02-01)Uganda has many isolated communities that are not connected to the national grid and most of such communities are Islands. Most of these communities meet their electricity demand through stand-alone diesel generators and ... -
Mathematical Models for HIV-HCV Co-infection Dynamics under Various Control Strategies
(Makerere University, 2022-03)Both HIV and HCV have considerable contribution to the global morbidity and mortality. Since these two viruses have similar transmission routes, HIV-HCV co-infection is common. The existing HIV-HCV co-infection mathematical ... -
Reduced modules relative to functors
(Makerere University, 2022-03)Reduced rings form an important class of rings which properly contains domains. The notion of reduced rings was studied and later extended to modules. Reduced modules have been studied using an element-wise approach. We ... -
Genotyping Rhesus, Kidd, Dombrock and Colton blood group systems in sickle cell patients in Uganda
(Makerere University, 2022-03)Sickle Cell Disease (SCD) is one of the most prevalent genetic blood disorders. Blood Transfusion (BT) has remained a cornerstone in its management but exposes a recipient to RBC alloimmunization. In Uganda an alloimmunization ... -
General large deviations of longest gaps in homogeneous Poisson processes
(Elsevier, 2020)Let (N(t))t≥0 be a homogeneous Poisson process with unit intensity. The longest gap L(t)of this process is the maximal time subinterval between epochs of arrival times up to time t, and it finds applications in the theory ... -
Limiting behaviours of the longest gaps between occurrence epochs in poisson processes
(Makerere University, 2022-02)This study concerns the limiting behaviours of the longest gap, between epochs in Poisson processes up to time t using large deviation theory. This theory is an area of probability theory which provides tools for studying ... -
Effect of changing temperature on the metabolic performance and life history of Nile Tilapia - Oreochromis Niloticus (Linnaeus, 1758)
(Makerere University, 2021-11)Tropical fresh water fishes are believed to be vulnerable to the impacts of climate warming on the basis of their physiological history, that is having a narrow thermal window and a low acclimation capacity. In this study, ... -
Flattened partitions: pattern avoidance and behavior of permutation statistics
(Makerere University, 2021-11-10)The study of permutations, and specifically flattened partitions is an active area of current research. We provide a new combinatorial interpretation to the sequence A124324 in the On-line Encyclopedia of Integer Sequences ... -
Genetic profiles of single nucleotide polymorphisms in alcohol metabolizing enzymes in the Ugandan population
(Makerere University, 2022-02)The pathway for alcohol (ethanol) metabolism in the body is catalyzed by alcohol dehydrogenase enzymes (ADHs), catalase (CAT) and CYP2E1 to generate acetaldehyde, which is metabolized by aldehyde dehydrogenase enzymes ... -
Nitrosoamines and narcotic drugs in smokeless tobacco products sold on Kampala City markets
(Makerere University, 2018-08)The consumption of smokeless tobacco products in Uganda has increased due to unregulated sale and easy of accessibility by the youth. It is usually characteristic of consumers of smokeless Tobacco products to behave ... -
Evaluating the shielding properties of selected building materials used in Kampala, Uganda for gamma radiation
(Makerere University, 2021-04)Humans are continuously exposed to ionizing radiation. For high ionizing radiation levels, shielding is needed to mitigate unwanted exposure. In this study, Shielding properties of selected local building materials used ... -
Incidence of mycotoxin producing fungi and aflatoxins in maize grains and flour in Arua District.
(Makerere University, 2022-02-04)The maize value chain in Uganda lacks mechanisms that ensure grain and flour quality and safety. The objective of this study was to assess the safety of maize and maize flour produced in Arua district with respect to fungal ... -
Hierarchical models and spatio-temporal processes in data analysis
(Makerere University, 2021-12)Spatio-temporal processes evolve in space and time. As a consequence data from such processes, usually possess both temporal and spatial dependence which have to be reflected by fitted stochastic models. The existing ...