The sawdust stove (SOS) has been introduced in Ghana as a cook stove using a- renewable energy resource (RER) - sawdust, for almost thirty years now. Over these years however, the sawdust stove is not as widely in domestic use as the wood stove and charcoal "pot" even where sawdust abounds. This study therefore sought to find the reasons behind the non-adoption of the sawdust stove, and based on the findings, recommend practical and money-saving ways of using the stove. Literature review on s...
Abstract/Overview A new guidance law is derived for missile against maneuvering target by adopting nonlinear H∞ control theory. The guidance law is based on three dimension (3D) nonlinear kinematics described by modified polar coordinate (MPC). In MPC, only three differential equations are used to describe the 3D relative motion between missile and target. The new guidance law is designed by solving the Hamilton-Jacobi-Isaacs (HJI) equation by simultaneous policy update algorithm (SPUA)...
Abstract: Quantum key distribution (QKD) and quantum secret sharing play a pivotal role in securing con dential information. QKD allows legitimate parties to create a cryptographic key which they can use to communicate privately without being intercepted by a malicious eavesdropper. QKD exploits the laws of quantum mechanics such as the Heisenberg uncertainty principle, the no cloning theorem and the principle of entanglement to detect any eavesdropper who tries to gain the knowledge of the ...
Abstract: This work is primarily focused on probing quantum gravity through astrophysical observations based on the theoretical framework of the Nexus Paradigm of quantum gravity. The Nexus Paradigm is a theoretical framework that is still in development and offers a different approach to the problem of quantum theory of gravity. In this framework gravity, Dark Energy (DE) and Dark Matter (DM) are seen as different manifestations of the quantum gravity. Astrophysical observations offer a...
Abstract The study focuses on the potential of naturally occurring dyes as photosensitizers in dye-sensitized solar cells (DSSCs). DSSCs are a type of solar cell that uses chemicals called photosensitizers to absorb energy from visible light and produce excited electrons. In 1991, Grätzel and his co-workers developed DSSCs, which have gained attention in recent years. However, the ruthenium-based compounds used as photosensitizers are expensive, and research suggests that organic dyes ...
Naturally occurring radionuclide materials are usually absorbed by plants through their root systems as nutrients, which in turn pose a radiation risk to humans when they consume the plants as food. This study evaluated the radionuclide risks from naturally occurring radionuclides in samples of commonly consumed vegetables in Owerri. Gamma ray spectroscopy was used to analyze and profile the 226Ra, 232Th and 40K levels in the vegetable samples of African basil, water leaf, uziza leaf and bitt...
Naturally occurring radionuclide materials are usually absorbed by plants through their root systems as nutrients, which in turn pose a radiation risk to humans when they consume the plants as food. This study evaluated the radionuclide risks from naturally occurring radionuclides in samples of commonly consumed vegetables in Owerri. Gamma ray spectroscopy was used to analyze and profile the 226Ra, 232Th and 40K levels in the vegetable samples of African basil, water leaf, uziza leaf and bitt...
This paper investigates the propagation of neutrinos in a curved spacetime background. Following from this, we propose a novel mechanism for generating their masses via gravity-embedded Weinberg operator. This model arises from a hitherto unexplored interaction between gravitational field and the Majorana-neutrino fields. Two distinct methods, each, of calculating dimensionless gravitational couplings from a gravitational field and spontaneous-symmetry-breaking mass-scale of high-energ...
Many physical processes are expensive or impracticable to observe directly, and certainly they can only be observed in operation under conditions that actually exist. Almost any industrial process, almost any natural biological, physical, or social environment, and almost any large computing system is quite complex. Such as, building a large chemical plant based on a newly discovered sequence of reactions without knowing that it will work on a large scale much as it does in the laboratory wou...
ABSTRACT Road traffic injuries among motorcyclists worldwide have persisted as a serious public health problem with much of the health burden in the developing countries especially the middle and low-income countries. This problem has not excluded Ghana which continually suffers from road traffic injuries and fatalities mainly caused by over speeding, non-adherence to road safety regulations (helmet usage) and poor enforcement of traffic regulations. The main aim of the study was to determin...
ABSTRACT Despite many building have firefighting systems installed in them; many people are still losing their lives and property due to fire accidents. The cost of installation of these systems is usually high and most of them are operated manually. They are often located inside the building which may not be accessible during fire accidents. In this research, an automatic cost effective prototype of a fire fighting system for the detection and control of fire has been designed and fabricated...
ABSTRACT Advanced technology in petrochemical based polymers has brought many benefits to mankind. However; it has become evident that the ecosystem is being disturbed because of non-biodegradable plastic materials. The environmental impact of persistent plastic wastes is growing into a more global concern. Currently, there is considerable interest in biodegradable polymers, which can be used as alternatives to traditional plastics, thus reducing the pollution caused by plastic wastes. The ma...
ABSTRACT Natural radiation is the major source of external doses in our environment. Human exposure to high dose rates poses a health risk. In this research work, radiometric survey and dose rate assessment was carried out on Archean rocks within the gold belt mining complex of Migori, Kenya. The objective was therefore to find out the contribution of different Archean rocks to the ambient gamma-ray dose in the mining complex. The high-resolution gamma-ray spectroscopy NaI (TI) provided a sen...
ABSTRACT Antibiotic resistance is a growing concern for public and animal health. Threats to public health could come from the transfer of pathogens from animals to people via indirect contact such as through food or by direct contact with animals during handling process. Development and prevalence of antibiotic resistance of Salmonella and Escherichia coli strains is common. There is also acquisition of pathogenicity by the commensals. The purpose of the present study was to determine the pr...
ABSTRACT Kenya has been experiencing rising cases of diseases such as diabetes, tuberculosis, liver complications, HIV/AIDS among others. Management of these conditions can be enhanced by use of plant-based trace elements. There is a need therefore to investigate crops that can provide a cheap source of these essential immune boosting trace elements. Grain amaranth is grown in different parts of Kenya including Bureti, Mt Elgon, Bondo, Meru and Embu. However, little research has been reporte...