Department of Physics: Recent submissions
Now showing items 21-40 of 75
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Computation of the Expectation Value of the Electron – Phonon and Coulomb Interaction Hamiltonian using Second Quantization and Many Body Techniques
(International Journal of Research and Analytical Reviews (IJRAR), 2020-12)The problem of the strong electron coupling in the theory of superconductivity has been discussed in many studies on the basis of electron and phonon spectral functions. For the rationale of investigating the effect of ... -
Frequency stability characterization: DFB laser and Raman pump performance on a distributed clock signal over 24.69 km fiber
(Journal of the Optical Society of America, 2020-07)Distribution of timing and frequency signals in a fast-changing world requires unprecedented levels of stability for characterization.Transfer of frequency references over long distance without introducing any additional ... -
Improving Students’ Application of Moment of Force Concepts in Physics through Experimental Approach, a case of Secondary Schools in Marakwet West Sub-County, Elgeyo Marakwet County, Kenya
(African Journal of Education, Science and Technology, 2021)An investigation was carried out to ascertain the effectiveness of experimental approach on students’ application of moment of force concepts in Physics in secondary schools in Marakwet West Sub-county, Elgeyo Marakwet ... -
Analysis of CSRZ and CSNRZ Coding for DQPSK and OQPSK Transmitter Configurations for Optical Microwave Generation Signals Based on Stimulated Brillouin Scattering
(World Scientific News, 2020)The use of Carrier Suppressed Non-Return to Zero (CSNRZ) and Carrier Suppressed Return to Zero (CSRZ) modulation formats in Dense Wavelength Division Multiplexing (DWDM) channels at 1 Gb/s and 10 Gb/s is investigated. ... -
INCOMMENSURATE CRYSTALLIZATION OF NEUTRON MATTER IN NEUTRON STARS
(EAST EUROPEAN JOURNAL OF PHYSICS, 2020)The composition of the neutron stars from its surface region, outer-core, inner-core, and to its center is still being investigated. One can only surmise on the properties of neutron stars from the spectroscopic data ... -
CRYSTALLIZATION OF HELIUM-3 AND NEUTRON MATTER FERMIONS IN CONDENSED MATTER PHYSICS
(University of Eldoret, 2017)In this Thesis crystallization of a hard-sphere assembly of fermions with densities ranging from low to high values has been theoretically investigated, the fermions are very close to each other, and the interaction between ... -
MID-GAP STATES IN DEFECTIVE ANATASE TiO2 : A DENSITY FUNCTIONAL THEORY STUDY PLUS A HUBBARD TERM (DFT+U)
(University of Eldoret, 2016)Motivated by the performance of reduced Titania in various important applications including photo-catalysis, photo-voltaics and CO2 reduction in hydrocarbon fuels, a systematic study of the structural properties and the ... -
Ab-initio STUDIES OF STRUCTURAL, ELECTRONIC, MAGNETIC AND OPTICAL PROPERTIES OF NICKEL OXIDE
(University of Eldoret, 2014)Nickel Oxide (NiO) has many applications in solar energy utilization, due to variations in electronic, optical and magnetic properties. However, a satisfactory description of its properties is still not available. There ... -
MODELING OF RING RESONATOR AS AN OPTICAL FILTER USING MEEP SOFTWARE
(University of Eldoret, 2016)Ring resonators are key components in modern optical networks. Their small size allows high density integration in optical photonic circuits due to the use of high index contrast. Ring resonator filters based Optical Filters ... -
HYDROMECHANICAL SLOPE STABILITY ANALYSIS: MODELLING, MONITORING AND PREDICTION USING BP-FF ARTIFICIAL NEURAL NETWORKS
(University of Eldoret, 2021)Sloping regions of the earth’s crust have formed part of human settlements from time immemorial. However, these regions are prone to geological hazards especially mass wasting processes such as debris flows and landslips. ... -
Modulated Raman pump for integrated VCSEL-based reach enhancement and clock tone dissemination in optical communication
(Elsevier, 2019)The fast growth of data traffic in access networks calls for high speed and low-cost optical links. To extend reach for users in metro areas requires optical amplification of the signal carrying data. In this paper ... -
Integrated extended reach VCSEL interconnect with 8.5 Gbps data modulated forward Raman pump signals
(JOURNAL OF MODERN OPTICS, 2019)We experimentally present thefirst reported integrated cross-modulatedforward Raman pump, with low-cost, power-efficient VCSELs. A single-mode VCSEL is directly modulated with 8.5 Gbps data and transmitted over a 50.7 ... -
PHASE TRANSITION IN SUPERCONDUCTORS
(University of Eldoret, 2015)Superconductivity is the disappearance of DC electrical resistance in a material when it is cooled to a certain critical temperature, when a material changes from normal state to superconducting state when it is cooled ... -
THE CORRELATION BETWEEN NUCLEON-NUCLEON INTERACTION, PAIRING ENERGY GAP AND PHASE SHIFT FOR IDENTICAL NUCLEONS IN NUCLEAR SYSTEMS.
(University of Eldoret, 2021)The correlation between nucleon-nucleon interactions 𝑉(𝑟) and the pairing energy gap Δ is studied theoretically. When two nuclear particles collide due to the interaction, they get scattered after approaching within a ... -
A MODIFIED NUCLEAR MODEL FOR BINDING ENERGY OF NUCLEI AND THE ISLAND OF STABILITY
(University of Eldoret, 2021)A new nuclear model of quantifying binding energy of nuclei is proposed. The nucleus is assumed to be composed of two regions; the inner core region and surface region. The inner core is assumed to be composed of Z ... -
CANONICAL TRANSFORMATION AND THE PROPERTIES OF A MIXTURE OF FERMIONS AND BOSONS AT LOW TEMPERATURE
(University of Eldoret, 2021)Properties of free and interacting systems of bosons and fermions have been studied theoretically using canonical transformation. In the last few years (1995 to be exact), condensates have been obtained practically in the ... -
Quasi-Particle Energy of a Mixture of Two-Component Gas of Bosons
(World Scientific News, 2020)The properties of two component interacting gas of bosons are studied by assuming two slightly different types of interactions between the atoms of the two gases. The system is described by two operators a and b, that ... -
Performance of 1550 nm VCSEL at 10 Gb/s in G.655 and G.652 SSMF
(International Journal of Sustainability Management and Information Technologies, 2020)Vertical cavity surface emitting lasers (VCSELs) are now major optical sources in optical communication and technology. The VCSEL-based transmission systems satisfy the next generation optical fibre access networks ... -
The Role of Shell Model in Determining Pairing Interaction in Nuclei
(International Journal of Recent Research Aspects, 2019)The role of the shell model in pairing interaction in nuclei is investigated by calculating the pairing energies of O–O (odd–odd), O–E (odd–even), E–E (even–even) and E–O (even–odd) isotopes of four elements namely; 15P, ... -
MECHANICAL AND ELECTRONIC PROPERTIES OF CUBIC BORON NITRIDE AND CARBON BORON NITRIDE: A QUANTUM MONTE CARLO STUDY
(University of Eldoret, 2013)Carbon Boron Nitride (BC2N) has attracted a lot of attention in research and industry since it was first synthesized and continues to maintain this interest due to the fascinating mechanical and electronic properties ...
