Research Papers/Topics in Physics

Iron Ore Mineral Deposits Exploration By Ground Magnetics In Kindani Area, Meru County, Kenya

Recent geophysical surveys have reported presence of iron ore deposits within Meru County. It has been speculated that there could be more deposits within the region. Ground magnetic surveying was used to detect magnetic rocks within host formations in Kindani area of Maua. A fluxgate magnetometer was used to measure the vertical component of the Earth’s magnetic field in some 98 stations, covering an area of about 25 km2. Diurnal and geomagnetic corrections were then done on the dat...

Radioactivity Concentrations And Dose Assessment For Soil Samples From Wheat Plantation Areas Of Narok County, Kenya

Naturally occurring radioactivity has existed in our environment since the creation of the earth. Uranium, thorium and potassium radionuclides are relatively abundant in rocks and soils. Poor agricultural practices such as excessive use of fertilizers also lead to accumulation of radioactive elements in the soil. Due to their radiation, these radionuclides pose exposure risks which could lead to health related problems like cancer to the people exposed. There is therefore a growing conc...

Characterization Of Snxsey / Sno2-Ni Prepared By Spray Pyrolysis For Photovoltaic Application

Nickel doped tin oxide and tin monoselenide thin films were coated using spray pyrolysis. Nickel doped tin oxide Precursor solution was prepared using a 0.05M Tin (II) Chloride (SnCl4.2H2O) and 0.05M Nickel chloride 6-hydrate (NiCl2.6H2O) in de-ionized water and then being added in ethanol in the ratio 1:1 to get equal proportions, followed by about 2-3 drops of hydrochloric acid. Doping tin oxide was done using uniform concentration of (NiCl2.6H2O) of 0-10 %.  Precursor solution ...

Geophysical Prospection Of Iron-titanium Oxide (Ilmenite) Using Magnetic Method In Magaoni, Kwale County, Kenya.

The geology of Magaoni area is associated with the presence of heavy minerals. Magaoni neighbours    Maumba and Nguluku where ilmenite was discovered by Tiomin Resource Inc. in1996, using drilling and chemical analysis.  Ilmenite mineral is known to be magnetically weak, but provides observable magnetic response. In this study, ground magnetic survey method was carried out to map magnetic anomalies of established stations, associated with ilmenite bearing formations...

Investigations Into The Permeability And Tectonic Lineaments Of Homa Hills Geothermal Prospect, Using Ground Magnetic Method

In this study, the tectonic lineaments and permeability around Homa Hills geothermal prospect, Nyanzian rift were investigated in order to explore its geothermal potential using ground magnetic method. A proton-precession magnetometer model G-856 of accuracy of ±0.1nT was used to take total magnetic field intensity of the earth at every station. A total of 86 magnetic stations were established over an area of about 76km2. The magnetic data at each station was corrected for both diurna...

Radiation Exposure Levels Associated With Construction Sand From Tharaka-Nithi County In Kenya

Natural radioactivity levels and radiation risks due to construction sand mined from Tharaka region of Tharaka-Nithi County in Kenya has been measured. The region is mostly rocky with majority of rocks being volcanic rocks and sedimentary rocks of volcanic origin; the area is occupationally characterized by sand mining for construction purposes within the County and also in some parts of the neibouring Meru and Embu Counties. The sand is mined along the river banks and also gullies that...

Calculation Of Cross Sections For Elastic Scattering Of Electrons By A Magnesium Atom At Intermediate Energies

Elastic electron-atom collision data from experimental and theoretical studies is useful in the interpretation of spectra obtained in X-ray photoelectron spectroscopy and Auger electron spectroscopy as well as in the Monte Carlo simulation of conduction electrons in solids. In principle the behaviour of an electron-atom collision system is predicted by solving the Schrödinger equation. However this task is far from simple in that the equation can only be solved exact...

Use Of Learner- Centered Teaching Methods Towards Improving Student Performance In Secondary School Physics In Migori County, Kenya

ABSTRACT STEM Subjects and specifically Physics plays a major role in national development its knowledge is crucial in the manufacturing, healthcare and housing industries. This therefore calls for proper acquisition of knowledge and skills in the subject. However, the performance in the subject is low. The purpose of the Study was to establish the use of Learner- centered teaching methods to improve performance of Physics in Migori County. The main objectives of the study were; a)...

First Principles Study Of Structural, Electronic And Mechanical Properties Of Lanthanum Fluoride And Lanthanum Doped Barium Fluoride

ABSTRACT Lanthanum Fluoride (LaF3) has several applications for instance, in electrodes manufacture, fluorescent lamps and fiber optic devices due to its high heat capacity. Barium fluoride (BaF2) is an alkaline-earth element with a wide band gap with many optical applications, such as lithography. BaF2 has been established as an excellent candidate that is useful for hosting optically active centers (OAC).Lanthanide elements have been used as dopants in BaF2 lattice to achieve the desi...

Advantages of Using Biomass as Alternative Energy

AbstractThe focus of the researchis to investigate the advantages of biomass as analternative energysource to prevent or reduce the additional emissions ofgreenhouse gases; that is released from the conventional fuels combustion.A studyalso put a spot of light on the potentialof different sources whichcan produce good amount of biomass as fuelfeed stock.It is clear thatbiomass can be used as an alternative source of energy if the mentioned recommendations are done.

Multivariate Chemometric Analysis Of Radon Concentration In Geothermal Fluids From Homa Mountain, High Background Radiation Area (Hbra

ABSTRACT The activity concentration of radon in geothermal waters from Homa mountain region of south-western Kenya has been measured. Homa mountain is one of the regions in Kenya with elevated background radiation. This region is covered with geothermal grass and has some cold and hot springs. The activity concentration of radon in spring waters, river waters and pond waters from (i) geothermally active HBRA (ii) non-geothermally active HBRA and (iii) non-geothermally active non-HBRA areas of...

Effects Of Consolidation Parameters On Mechanical Properties And Thermal Degradation Of Self Reinforced High Density Polyethylene Composite

ABSTRACT The numerous applications of high density polyethylene (HDPE) in industries for production of domestic and commercial commodities have made it necessary to find ways of improving its mechanical properties. The most common way of doing this is to add reinforcement such as glass fibers. However these composites suffer limitations due to reduced recyclability, great weight and difficult to thermo-form. In order to improve properties such as specific strength, stiffness and thermo-formab...

Characterization Of Cu2s / Sno2: F P-N Junction For Solar Cell Applications

ABSTRACTDue 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 hand silicon based solar cells are expensive hence the need for low cost and reliable alternative source of energy. Photovoltaic is a reliable energy source which is renewable. Photovoltaic is a process of conversion of solar energy to electri...

Assessment Of Human Exposure To Natural Source Of Radiation On The Soil In Tongaren Constituency Of Bungoma County, Kenya

ABSTRACT Radionuclides are unstable nuclei with high ratio of proton to neutron. Natural activities like volcanic eruption and anthropogenic activities expose originally concealed radioactive elements in the rocks within the earth crust. Poor agricultural practices such as excessive use of fertilizers add radioactive elements in the soil. Transport agents like run-off water and rivers, spreads these radionuclides within the soil in Tongaren Constituency. The radionuclides disintegrate t...

Natural Radioactivity Measurements And Evaluation Of Radiation Hazards In Soil Samples Of Shinyalu, Kakamega County, Kenya

ABSTRACTRadioactive 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 radionuclides lead to internal exposure. In addition, humans also receive external exposure due to the radioactive materials located outside the body. Primordial radionuclides 238U, 232Th and 40K are the main sources of external radiation exposure to the general pub...


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