University Journals/ Articles: Recent submissions
Now showing items 701-720 of 1502
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Antimicrobial Coumarins from the Oyster Culinary-Medicinal Mushroom, Pleurotus ostreatus (Agaricomycetes), from Keny
(International Journal of Medicinal Mushrooms, 2016-10-05)Pleurotus ostreatus has been widely used as food because of its nutritional and medicinal properties. These have been attributed to the presence of macronutrients, minerals, vitamins, and amino acids, among other secondary ... -
Shotgun Metagenomic Analyses of Microbial Assemblages in the Aquatic Ecosystem of Winam Gulf of Lake Victoria, Kenya Reveals Multiclass Pollution
(BioMed Research International, 2023-07-21)Lake Victoria, the second-largest freshwater lake in the world, provides an important source of food and income, particularly fish for both domestic consumption and for export market. In recent years, Lake Victoria has ... -
Influence of Liquidity Risk Management on Financial Performance of Commercial Banks in Kenya
(African Journal of Empirical Research, 2023-07-05)The management of liquidity risk in commercial banks determines the banks' financial performance, which predominantly influences the quality of the loan portfolio and the nature of credit administration programs as a whole. ... -
On the Zero Divisor and Cayley Graphs of Some Classes of the 2-Radical Index of Nilpotence Finite Local Rings
(Journal of Advances in Mathematics and Computer Science, 2022-07-08)The characterization of finite local rings via the well known structures of their zero divisor graphs and cayley graphs remains an open problem. Some classes of completely primary finite rings which are local, have however ... -
On Characterization of Norm Attaining Operators in Fr´echet Spaces
(Journal of Advances in Mathematics and Computer Science, 2022-10-25)In this paper, the norm attaining operators in Fr´echet spaces are considered. These operators are characterized based on their density, normality, linearity and compactness. It is shown that the image is dense for a ... -
Regular Elements and Von-Neumann Inverses of a Class of Zero Symmetric Local Near-Rings Admitting Frobenius Derivations
(Asian Research Journal of Mathematics, 2023-01-01)Let N be a zero-symmetric local near-ring. An element x ∈ N is either regular, zero or a zero divisor. In this paper, we construct a class of zero symmetric local near-ring of characteristic p k ; k ≥ 3 admitting an ... -
Automorphism Groups of Regular Elements with Von-Neumann Inverses of Local Near-Rings Admitting Frobenius Derivations
(Asian Research Journal of Mathematics, 2023-01-28)This paper presents the classification of the invariant subgroups of the automorphism groups of the regular elements obtained from finite local near-rings, the appropriate algebraic structure to study non-linear functions on ... -
Local Fractional Strong Metric Dimension of Certain Complex Networks
(Complexity, 2023-05-05)Fractional variants of distance-based parameters have application in the fields of sensor networking, robot navigation, and integer programming problems. Complex networks are exceptional networks which exhibit significant ... -
Mostar Index of Cycle-Related Structures
(Journal of Chemistry, 2022-03-07)A topological index is a numerical quantity associated with the molecular structure of a chemical compound. This number remains fixed with respect to the symmetry of a molecular graph. Diverse research studies have shown ... -
ON THE ADJACENCY AND INCIDENCE MATRICES OF THE ZERO DIVISOR GRAPHS OF A CLASS OF THE SQUARE RADICAL ZERO FINITE COMMUTATIVE RINGS
(International Journal of Pure and Applied Mathematics, 2018-04-16)The characterization of the zero divisor graphs of commutative finite rings has attracted a lot of research for quite sometime, however not so much has been done concerning their Adjacency and Incidence matrices. In ... -
Students’ Perception of Teacher Classroom Effectiveness and Academic Achievement: A Case of Secondary School Students in Hamisi Sub-County, Kenya
(African Journal of Empirical Research, 2023-07-19)Teacher classroom effectiveness plays a crucial role in influencing students' perceptions and academic achievement. This study aimed to address this research gap by examining students' perceptions of teachers' classroom ... -
Influence of Teacher’s Self-Worth on Secondary School Learners’ Academic Performance in Kakamega County, Kenya
(African Journal of Empirical Research, 2023-05-19)Teachers are charged with the responsibilities of leadership management in schools in Kenya. Teachers, as decision-makers, are continually faced with problems managing school resources and funds. Since principals have a ... -
Meyer-Neldel rule for Cu (I) diffusion in In2S3 layers
(Journal of Applied Physics, 2014-02-03)The nature of barriers for atomic transport in In2S3 layers has been varied by addition of chlorine. Diffusion of Cu(I) from a removable CuSCN source was used to probe the variation of the barriers. The Meyer-Neldel ... -
Effect of Surface Passivation on Electrical Properties of Pd-F:SnO2 Thin Films Prepared by Spray Pyrolysis Technique
(MDPI, 2014-11-19)Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique. Optimization has been done by doping SnO2 with palladium at varying levels of concentration and then recording sheet resistance. The sheet resistivity ... -
Role of Cl on Diffusion of Cu in In2S3 Layers Prepared by Ion Layer Gas Reaction Method
(coatings, 2015-02-15)Ion layer gas reaction (ILGAR) method allows for deposition of Cl-containing and Cl-free In2S3 layers from InCl3 and In(OCCH3CHOCCH3)3 precursor salts, respectively. A comparative study was performed to investigate the ... -
Electrical and Structural Properties of Aluminium Doped tin Oxide Codoped with Sulphur for Solar Energy
(Energy Procedia, 2016-08)Thin films of Tin Oxide co-doped with 28 atomic percentages of Aluminium (i.e. 28 at% Al) and varied concentration of Sulphur were prepared on 1mm thick, 1cm by 1cm glass substrates at 470 0C by Spray Pyrolysis technique. ... -
A Surface Photovoltage Study of Surface Defects on Co-Doped TiO2 Thin Films Deposited by Spray Pyrolysis
(MDPI, 2016-07-22)Surface photovoltage (SPV) spectroscopy is a powerful tool for studying electronic defects on semiconductor surfaces, at interfaces, and in bulk for a wide range of materials. Undoped and Cobalt-doped TiO2 (CTO) thin films ... -
Compositional analysis and optical properties of Co doped TiO2 thin films fabricated by spray pyrolysis method for dielectric and p hotocatalytic applications
(Optik, 2017-01)Cobalt doped TiO2 thin films (CTF) deposited by spray pyrolysis has been studied. The compositional analysis has been done using RBS method, while optical spectroscopy has been done by measuring the transmittance and ... -
Enhanced performance of Sb2S3 mesoscopic sensitized solar cells employing TiO2:Nb compact layer
(Journal of Materials Science: Materials in Electronics, 2018-07-28)This paper reports on the enhancement of charge transport and recombination by niobium doped compact layers of TiO2 in a solar cell with Sb2S3 absorber layer by characterizing both thin films of TiO2:Nb and working solar ... -
Probing the equatorial ionosphere using spread-F signatures and GPS scintillations at Maseno in East Africa
(Advances in Space Research, 2018-10-01)The Maseno (0.0°S, 34.6°E) ionosonde and the Mbarara (0.6°S, 30.7°E) GPS SCINDA receiver have been used to probe the equatorial ionosphere of the East Africa region using data obtained in 2012 and 2015. The equatorial ...
