Browsing RP-Department of Physics by Title
Now showing items 1-20 of 112
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2D-Euler Deconvolution and Forward Modeling of Gravity Data of Homa-Hills Geothermal Prospect, Kenya
(2014-02-25)In order to fully assess the potential of Homa Hills Geothermal prospect, the heat source which is one of the main features of a geothermal system had to be located based on its perturbation on the gravity field. Ground ... -
2D-Forward Modeling of Ground Magnetic Data of Homa-Hills Geothermal Prospect Area, Kenya
(SAGE Publications, 2014)Two dimensional (2D) Euler de-convolution techniques was applied on the selected profiles of reduced ground magnetic data collected in Homa Hills area. Depth estimates of causative bodies were quantitatively analysed in ... -
An algorithm for simulation of a Chemical Transport Equation in an Aquifer
(2012)Dynamical systems can be predicted using mathematical models. These models are usually Partial Different Equations (PDEs). Examples include the wave equation, equations for diffusive processes, and the heat conduction equation. ... -
Analysis of Internal Exposure Associated with Consumption of Crops and Groundwater from the High Background Radiation Area of Mrima Hill, Kenya
(Oxford University Press, 2014-09)Specific concentrations of (226)Ra, (232)Th and (40)K were measured in cassava tubers, cassava leaves and groundwater obtained from the high background radiation area of Mrima hill and used in the evaluation of the ingested ... -
Analysis of Soil for Trace Elements along Two Highways of Kenya
(Faculty of Science Kenyatta University, 1998)Energy dispersive X-ray fluorescence technique has been used to study the levels of lead and other toxic trace elements in the soil samples collected along two major highways (Mombasa and Thika) of Kenya at the various ... -
Assessment of Levels of Natural Radioactivity in Sand Samples Collected from Ekalakala in Machakos County, Kenya
(Hindawi, 2020)Construction sand is naturally polluted with radionuclides of terrestrial origin. In this study, specific activities of 238U, 232+, and 40K in 30 sand samples collected along the Ekalakala River, Machakos County, Kenya, ... -
Assessment of Radioactivity Levels and Risks Due to Different Rock Types from the KERIO Valley “High Background Radiation Area (HBRA)” of Kenya
(IJMPSR, 2015)The goal of this study was to analyse the natural radioactivity levels and assess the contribution of different rock types to environmental dose in the Kerio Valley region of Kenya, a suspect high background radiation area ... -
Auger electron spectroscopy study and depth profile analyses of the CaS:Eu2+ pulsed laser deposited thin luminescent films
(Springer Science+Business Media, 2016)This paper presents the results of a study of the chemical composition, depth profile analyses of pulsed laser deposited CaS:Eu2? thin films grown at different substrate temperatures. Using Auger electron spectroscopy, we ... -
Calculation of Cross Sections for Elastic Scattering of Electrons at Intermediate Energies by a Magnesium Atom
(The African Review of Physics, 2014)We have obtained differential and integral cross sections for elastic scattering of electrons by magnesium atom at 10 – 100 eV using a complex, local, energy-dependent, spherically-symmetric optical potential incorporating ... -
Calculation of linear and non-linear optical properties of amorphous Silicon
(Faculty of Science Kenyatta University, 2001)We have used the random phase model for the electronic wave functions to calculate the imaginary part of the dielectric function 82 (m) and the magnitude of the third harmonic generation, 11'3(OJ ~ using a model structure ... -
Cancer and Non-Cancer Health Risks from Carcinogenic Heavy Metal Exposures in Underground Water from Kilimambogo, Kenya
(Elsevier, 2020)Water is very crucial for man, animals and plants because of its health implications in case it is polluted. Water has many uses like drinking for man and animals, domestic use and for agricultural use. The concentration ... -
Characterization of Aluminum Doped Zinc Oxide (Azo) Thin Films Prepared by Reactive Thermal Evaporation for Solar Cell Applications
(OMICS International, 2015)Aluminium doped Zinc Oxide (AZO) thin films have been deposited using reactive thermal evaporation technique using an Edward Auto 306 Magnetron Sputtering System. Transmittance and reflectance data in the range 300 nm-2500 ... -
Characterization of SnSe-CdO: Sn PN Junction for Solar Cell Applications
(Scientific and Academic Printing (SAP), 2015)Solar energy has a great potential of meeting a large fraction of energy needs using photovoltaics. While most photovoltaic cells in use today are Silicon-based, cells of other semiconductor materials have been manufactured. ... -
Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds
(International Journal of Biomaterials, 2009)Metal-sample-metal sandwich configuration has been used to investigate DC conductivity in 4 mum thick Nandi flame [Spathodea campanulata P. Beauv.] seed cuticles. J-V characteristics showed ohmic conduction at low fields ... -
Consumers satisfaction in the energy sector in Kenya
(Energy Policy, 2012-09)This paper analyzes consumer satisfaction in the energy sector in Kenya to assess the quality and level of service delivery. By use of the European Consumer Satisfaction Index (ECSI), the paper estimates consumer satisfaction ... -
Creep and Recovery Behavior of Compression Molded Low Density Polyethylene/Cellulose Composites
(Hindawi Publishing Corporation, 2013)Low density polyethylene (LDPE) is an important industrial material because it is durable, light-weight, easily processed and characteristically inert, but its everyday use is hazardous to the environment. The solution to ... -
Crystallization kinetics of In40Se60 thin films for phase change random access memory (PRAM) applications
(2015-06)Chalcogenide based semiconductors have attracted much attention recently due to their applications in solid state devices (SSD). Chalcogenide phase change memory is considered as a potential replacement of flash memory due ... -
Crystallization kinetics of sputter-deposited amorphous AgInSbTe films
(American Institute of Physics (AIP), 2001-10)AgInSbTe films have recently attracted considerable interest as advanced materials for phase change recording. For this application the determination of crystallization kinetics is of crucial importance. In this work the ... -
Current-voltage characteristics of p-CuO/n-ZnO:Sn Solar cell
(Natural Sciences Publishing Cor., 2013)A p-CuO/n-ZnO:Sn heterojunction solar cell has been fabricated on glass substrate in steps using Edwards AUTO 306 vacuum coater system. Copper oxide has energy band gap of the range 1.21-2.1 eV while tin doped zinc oxide ... -
Current-voltage characteristics of p-CuO/n-ZnO:Sn Solar cell
(Natural sciences publishing corporation, 2013)Abstract: A p-CuO/n-ZnO:Sn heterojunction solar cell has been fabricated on glass substrate in steps using Edwards AUTO 306 vacuum coater system. Copper oxide has energy band gap of the range 1.21-2.1 eV while tin doped ...
