MST-Department of Physics
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Recent Submissions
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Levels of Natural Radionuclides in Khat (Catha Edulis) Leaves and Soils in Selected Areas in Embu County, Kenya
(Kenyatta University, 2022)Environmental data and information on levels of accumulation of radionuclides is crucial towards putting in place mitigation measures to ensure a safe environment. Over the past years, khat (Catha edulis) has been the major ... -
Enhancement of Morphological and Opto-Electronic Properties of Perovskite (Ch3nh3pbi3) Thin Films for Solar Cell Applications.
(Kenyatta University, 2022)The functionality of the photovoltaic devices greatly depends on the film morphology, which is determined by the deposition methods and annealing techniques. Organometal halide perovskite based solar cells represents an ... -
Design and fabrication of an energy efficient smart air conditioning system
(Kenyatta University, 2022)Residential and commercial space cooling demands are increasing steadily throughout the world. This has led to high growth in demand for air conditioning (AC) systems. Technology is playing a key role in digitization of ... -
Positron Impact Elastic Scattering by Calcium Atom Using First Order Distorted Wave Born Approximation with a Complex Potential
(Kenyatta University, 2022)The concept of elastic scattering of projectiles by atomic targets has the fundamental importance in understanding the complex projectile-target interaction and the dynamics of the collision process. Compared to electrons, ... -
Determination of the Level of Naturally Occurring Radioactive Nuclides from Soil Samples in Kikuyu, Kiambu County, Kenya
(Kenyatta University, 2022)Human population is exposed to ionizing radiation from radionuclides. Radionuclides that occur naturally and other forms of radiation from materials such as water and vegetation releases ionizing radiation that can be a ... -
Assessment of Radioactivity Concentration and Radiation Hazards Index for Building Materials Used in Babadogo Estate, Nairobi City County, Kenya
(Kenyatta University, 2022)Natural radioactive materials in certain conditions can get to hazardous radiological level. Some of these hazards are not prone to control as well as, they are usually referred to as the background radiation. The aim of ... -
Design and Fabrication of an Energy Efficient Smart Air Conditioning System
(Kenyatta University, 2022)Residential and commercial space cooling demands are increasing steadily throughout the world. This has led to high growth in demand for air conditioning (AC) systems. Technology is playing a key role in digitization of ... -
Analysis of Telluric Currents on Miniature Electrical and Electronic Circuits in Nairobi City and Kajiado Counties, Kenya
(Kenyatta University, 2021)The necessity for electrically ensured and trustworthy electrical and electronic contraptions or systems is growing in various business areas around the world, for instance, mechanical and manufacturing, vehicle, clinical, ... -
Modelling of Petroleum System Structures by Use of Gravity and Seismic Data in Kerio Valley Basin, Kenya
(Kenyatta University, 2021)Kerio valley basin is one of the sedimentary basins in Kenya known to have hydrocarbon formation potential. Exploration is ongoing in the area with different geophysical methods being employed. The possible existence of ... -
Gamma Ray Spectrometry of Phonolite–Kenyte Sequence of Volcanic Sediments from the Selected Areas in Nyeri County, Kenya
(Kenyatta University, 2021)NORM is the major contributor of human exposure to radiations. Health hazard risks emanating from this exposure are lives threatening and they include ailments such as cancer, eye lens opacity, tumors and fibroids. A good ... -
Analysis of Natural Radioactivity Levels and Radiation Hazards due to Murram Quarried in Kakamega County, Kenya
(Kenyatta University, 2021)Exposure to ionizing radiation from 40K and those in the decay chains of 238U and 232Th for a prolonged time poses danger to human population. While 238U, 232Th and 40K are universally present in rock and soil, their ... -
Tio2–Cu Thin Film Material for Optical Hydrogen Gas Sensor Applications
(Kenyatta University, 2021)Several scientific researches are underway to investigate the possibility of using various green energies. Hydrogen gas is a candidate of such research, since its use as a fuel in automobiles releases pure water, a recyclable ... -
Characterization of Radiation Protection X-Ray Beam for Secondary Standard Dosimetry Laboratory at Kenya Bureau of Standards
(kenyatta University, 2021)The need for specification of X-ray beam quality arises from the fact that several parameters are required to realize and measure operational quantities accurately. X-ray measurements are affected by target material, tube ... -
Radiometric Assessment of Natural Radioactivity Levels and Radiation Hazard Indices for Soil Samples in Kericho County, Kenya
(Kenyatta University, 2020-10)Throughout their lives, human beings are continually exposed to radiation from terrestrial radionuclides particularly 40K, 238U, 232Th and their decay products. The radiation, usually in the form of gamma rays and alpha ... -
Optical and Electrical Characterization of Sns – Sno2: Sb P-N Junction for Solar Cell Applications
(Kenyatta University, 2020-02)For sustainability of future civilization, development of alternative clean energy technologies to replace fossil fuels has become one of the most crucial and challenging problems of the last few decades. Thin film solar ...
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Levels of Natural Radionuclides in Khat (Catha Edulis) Leaves and Soils in Selected Areas in Embu County, Kenya
(Kenyatta University, 2022)Environmental data and information on levels of accumulation of radionuclides is crucial towards putting in place mitigation measures to ensure a safe environment. Over the past years, khat (Catha edulis) has been the major ... -
Enhancement of Morphological and Opto-Electronic Properties of Perovskite (Ch3nh3pbi3) Thin Films for Solar Cell Applications.
(Kenyatta University, 2022)The functionality of the photovoltaic devices greatly depends on the film morphology, which is determined by the deposition methods and annealing techniques. Organometal halide perovskite based solar cells represents an ... -
Design and fabrication of an energy efficient smart air conditioning system
(Kenyatta University, 2022)Residential and commercial space cooling demands are increasing steadily throughout the world. This has led to high growth in demand for air conditioning (AC) systems. Technology is playing a key role in digitization of ... -
Positron Impact Elastic Scattering by Calcium Atom Using First Order Distorted Wave Born Approximation with a Complex Potential
(Kenyatta University, 2022)The concept of elastic scattering of projectiles by atomic targets has the fundamental importance in understanding the complex projectile-target interaction and the dynamics of the collision process. Compared to electrons, ... -
Determination of the Level of Naturally Occurring Radioactive Nuclides from Soil Samples in Kikuyu, Kiambu County, Kenya
(Kenyatta University, 2022)Human population is exposed to ionizing radiation from radionuclides. Radionuclides that occur naturally and other forms of radiation from materials such as water and vegetation releases ionizing radiation that can be a ... -
Assessment of Radioactivity Concentration and Radiation Hazards Index for Building Materials Used in Babadogo Estate, Nairobi City County, Kenya
(Kenyatta University, 2022)Natural radioactive materials in certain conditions can get to hazardous radiological level. Some of these hazards are not prone to control as well as, they are usually referred to as the background radiation. The aim of ... -
Design and Fabrication of an Energy Efficient Smart Air Conditioning System
(Kenyatta University, 2022)Residential and commercial space cooling demands are increasing steadily throughout the world. This has led to high growth in demand for air conditioning (AC) systems. Technology is playing a key role in digitization of ... -
Analysis of Telluric Currents on Miniature Electrical and Electronic Circuits in Nairobi City and Kajiado Counties, Kenya
(Kenyatta University, 2021)The necessity for electrically ensured and trustworthy electrical and electronic contraptions or systems is growing in various business areas around the world, for instance, mechanical and manufacturing, vehicle, clinical, ... -
Modelling of Petroleum System Structures by Use of Gravity and Seismic Data in Kerio Valley Basin, Kenya
(Kenyatta University, 2021)Kerio valley basin is one of the sedimentary basins in Kenya known to have hydrocarbon formation potential. Exploration is ongoing in the area with different geophysical methods being employed. The possible existence of ... -
Gamma Ray Spectrometry of Phonolite–Kenyte Sequence of Volcanic Sediments from the Selected Areas in Nyeri County, Kenya
(Kenyatta University, 2021)NORM is the major contributor of human exposure to radiations. Health hazard risks emanating from this exposure are lives threatening and they include ailments such as cancer, eye lens opacity, tumors and fibroids. A good ... -
Analysis of Natural Radioactivity Levels and Radiation Hazards due to Murram Quarried in Kakamega County, Kenya
(Kenyatta University, 2021)Exposure to ionizing radiation from 40K and those in the decay chains of 238U and 232Th for a prolonged time poses danger to human population. While 238U, 232Th and 40K are universally present in rock and soil, their ... -
Tio2–Cu Thin Film Material for Optical Hydrogen Gas Sensor Applications
(Kenyatta University, 2021)Several scientific researches are underway to investigate the possibility of using various green energies. Hydrogen gas is a candidate of such research, since its use as a fuel in automobiles releases pure water, a recyclable ... -
Characterization of Radiation Protection X-Ray Beam for Secondary Standard Dosimetry Laboratory at Kenya Bureau of Standards
(kenyatta University, 2021)The need for specification of X-ray beam quality arises from the fact that several parameters are required to realize and measure operational quantities accurately. X-ray measurements are affected by target material, tube ... -
Radiometric Assessment of Natural Radioactivity Levels and Radiation Hazard Indices for Soil Samples in Kericho County, Kenya
(Kenyatta University, 2020-10)Throughout their lives, human beings are continually exposed to radiation from terrestrial radionuclides particularly 40K, 238U, 232Th and their decay products. The radiation, usually in the form of gamma rays and alpha ... -
Optical and Electrical Characterization of Sns – Sno2: Sb P-N Junction for Solar Cell Applications
(Kenyatta University, 2020-02)For sustainability of future civilization, development of alternative clean energy technologies to replace fossil fuels has become one of the most crucial and challenging problems of the last few decades. Thin film solar ... -
Natural Radioactivity Measurements and Evaluation of Radiation Hazards in Soil Samples of Shinyalu, Kakamega County, Kenya
(Kenyatta University, 2020-10)Radioactive elements are found everywhere in the environment. Detectable amounts occur naturally in soil, rocks, water, air and vegetation and may be ingested if they enter the food chain, or, inhaled. Inhaled and ingested ... -
Design and Construction of a Microcontroller-Based Human Audio Noise Monitoring and Control System
(Kenyatta University, 2020-11)Audio noise monitoring and control has been a subject of research for several decades. Researchers have developed audio noise monitoring systems which rely on computers, internet and mobile telephone services which are ... -
Optical and Electrical Characterization of Cdxni1-Xs and Sb2S3 Thin Films for Photovoltaic Application
(Kenyatta University, 2020-11)The demand for silicon in microelectronics has put a lot of strain on the availability and eventually high prices for silicon type of solar cells. In this work, nickel doped cadmium sulphide (CdxNi1−x S) was investigated. ... -
Reduction of Errors Caused by Cross-Polarization in a Microstrip Antenna
(Kenyatta University, 2020-01)Microstrip antennas are used for transmitting and receiving electromagnetic signals. The transmitted signals can be reflected back within the building. This affects the strength of signal transmission. Polarization of ... -
Characterization of Cu2S / SnO2: F P-N Junction for Solar Cell Applications
(Kenyatta University, 2019)Due to industrialization and increase in population, there is need for clean, green and renewable source of electrical energy. Traditional sources of electrical energy like fossil fuels are getting depleted, on the other ...
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