Now showing items 154-173 of 246

    • Negative Magnetization and Inverse Exchange Bias Effect Induced By Modulating the Relative Proportion of Mn in Gd 2 Co 2−Xmnxo6 Perovskites 

      Li, Canglong; Yang, Wenqian; Zheng, Shuangshuang; Barasa, Godfrey Okumu; Qiu, Yang; Bai, Chunxu (Physical Review, 2023-06-28)
      The magnetic properties of Gd 2 Co2−x Mnx O6 by modulating the relative proportion of Mn are experimentally investigated in this paper. The experimental results indicated that an intrinsic effect of negative magnetization ...
    • New synthetic pathways for thiocarbohydrazide and salicylaldehyde azine compounds 

      Lugasi, Solomon Omwoma (Asian Journal of Chemical Sciences, 2017)
      Thiocarbohydrazide synthesis is an important intermediate step for many hydrazine organic synthetic reactions. Synthesis of thiocarbohydrazide can be done by reaction of carbon disulfide with hydrazine (hydrazinolysis) ...
    • Nonlinear H∞ Guidance Design for Missile against Maneuvering Target 

      Makena, Jacqueline; Omwoma, Solomon (Science Domain, 2017-05-01)
      A new guidance law is derived for missile against maneuvering target by adopting nonlinear H∞ control theory. The guidance law is based on three dimension (3D) nonlinear kinematics described by modified polar ...
    • Nonzero Lie Brackets of Third Order Nonlinear Ordinary Differential Equation 

      Aminer, T. J.; Ongati, Omolo; Miginjo, O.P. (ResearchGate, 2018-06)
      Lie symmetry analysis of Ordinary Differential Equation can be used to obtain exact solution of the equation of the form F (x, y, y’ y’’ y’’’) = 0. In this paper we use Lie Symmetry analysis approach to obtain the nonzero ...
    • The norm attainability of some elementary operators 

      Okelo, Benard N. (Applied Mathematics E-Notes, 2012)
    • Norm-Attainability and Range-Kernel Orthogonality of Elementary Operators 

      Okelo, Benard (Communications in Advanced Mathematical Sciences, 12/24/2018)
      Various aspects of elementary operators have been characterized by many mathematicians. In this paper, we consider norm-attainability and orthogonality of these operators in Banach spaces. Characterizations and generalizations ...
    • Numerical Analysis of Mathematical Model for Carbon Pollution in Roads with Ventilated Embankments in Absence and Presence of Forced Convection 

      Awino, J. O.; Aminer, T. J. O.; Onyango, T. M.; Okelo, N. B. (International Journal of Multidisciplinary Sciences and Engineering, 2018-11)
      In this paper, a two-dimensional grid based numerical carbon pollution model for the estimation of carbon pollutant concentrations in roads is developed. The simulations of carbon pollutants in roads with ventilated ...
    • Numerical Analysis of Prey Refuge Effects on the Stability of Holling Type III Four-Species Predator Prey System 

      Odhiambo, Francis; Aminer, Titus; Okelo, Benard; Manyala, Julius (Scientific Research Publishing, 2023-06-29)
      The dynamic behavior of a multi-species system that includes a prey refuge and a Holling type III functional response is examined in this work. The pre-requisites for the presence of the equilibrium points, as well as their ...
    • Numerical solution of dynamic vibration equation, ܠሷൌ ܐ܋܍ܛ ܠ 

      Ochieng, H. A.; Aminer, Titus J. O. (IJEMS, 2016)
      In this paper, we examine conservative autonomous dynamic vibration equation, f(x) = sech x which is time vibration of the displacement of a structure due to the internal forces, with no damping or external forcing. Numerical ...
    • Numerical solution of dynamic vibration equations 

      Aminer, T. J. O.; Okelo, B. N.; Ongati, Naftali O.; Okoya, M. E. Oduor (International Journal of mathematical Archive, 2011-09)
      In this paper, we examine conservative autonomous dynamic vibration equation, , which is time vibration of the displacement of a structure due to the internal forces, with no damping or external ...
    • Nutritional and developmental influences on components of rice crop light use efficiency 

      Xue, Wei; Lindner, Steve; Nay-Htoon, Bhone; Dubbert, Maren; Ochuodho, Dennis O.; Muraoka, Hiroyuki (Elsevier, 2016)
      Light use efficiency (LUE) plays a vital role in determination of crop biomass and yield. Important components of LUE, i.e. canopy structure, nitrogen distribution, photosynthetic capacity and CO2 diffusion conductance ...
    • Occurrence of Fungal Foliar Diseases of Tomato in Different Agro-Ecological Zones of Kirinyaga County, Kenya 

      Ogolla, Fredrick Otieno; Muraya, Moses M.; Onyango, Benson O. (Fundamental and Applied Agriculture, 2022-03-30)
      Tomato production is characterized by inconsistent quality and yields due to biotic constraints such as fungal foliar diseases. Information on the occurrence of the diseases in different agro-ecological zones of Kenya is ...
    • Occurrence of nodulation in leguminous trees in Kenya 

      Anyango, Beatrice; Keya, Shelemiah (Journal of Tropical Microbiology and Biotechnology, 2005)
      Exploitation of the potential for nitrogen fixing trees, soil improvement and multipurpose use, requires a good knowledge of their nodulation capabilities and agrosilvicultural manipulation. Nitrogen Fixation in some ...
    • On Centre Properties of Irreducible Subalgebras of Compact Elementary Operators 

      W, Kangogo; N. B, Okelo; O., Ongati (doi:10.30538/psrp-oma2020.0065, 2020)
      In this paper, we characterize the centre of dense irreducible subalgebras of compact elementary operators that are spectrally bounded. We show that the centre is a unital, irreducible and commutative C∗ -subalgebra. ...
    • On Characterization of Very Rotund Banach Spaces 

      Wanjara, A. O.; Okelo, N. B.; Ongati, O. (International Journal of Modern Computation, Information and Communication Technology, 10/23/2018)
      It is known that the Hilbert space H is the most rotund space among all Banach spaces. The question whether if a normed space X is a rotund Banach space implies we can obtain other most rotund spaces is still open and ...
    • On Compact Operators Whose Norms Are Eigenvalues and Completeness 

      Owino, J. N.; Okelo, N. B.; Ongati, Omolo (International Journal of Contemporary Mathematical Sciences, 2/21/2018)
      Let X be a Banach space and T: X→Y be a linear operator, then Tis compact if it maps bounded sequences in X to sequences in Y with convergent subsequences, that is, if xn ∈ X is a bounded sequence, then T xn ∈ Y has a ...
    • On Compactness of Similarity Orbits of Norm-Attainable Operators 

      Mogotu, P. O.; Okelo, N. B.; Ongati, Omolo (International Journal of Mathematics And its Applications, 2019)
      The notion of compactness plays an important role in analysis. It has been extensively discussed on both metric and topological spaces. Various properties of compactness have been proved under the underlying spaces. However, ...
    • On denseness of similarity orbits of norm-attainable operators 

      Mogotu, P. O.; Okelo, N.B.; Ongati, Omolo (International Journal of Advances in Applied Mathematics and Mechanics, 4/16/2019)
      The notion of dense sets has been extensively discussed on both metric and topological spaces. Various properties of the sets have been proved under the underlying spaces. However, if we consider these sets to be from ...
    • On Equality of Complete Positivity and Complete Copositivity of Positive Map 

      Windaa, C. A.; Okelo, N. B.; Ongatia, Omollo (Journal of Linear and Topological Algebra, 5/30/2022)
      In this paper we construct a 2-positive map from M4(C) to M5(C) and state the conditions under which the map is positive and completely positive (copositivity of positive). The construction allows us to create a decomposable ...
    • On local minimum and orthogonality of normal derivations in Cp-classes 

      Owino, B. O.; Okelo, Bernad N.; Ongati, Naftali O. (G.I publications, 2017-02)
      The present paper gives some results on local minimum and orthogonality of normal derivations in Cp-Classes. We employ some techniques for normal derivations due to Mecheri, Hacene, Bounkhel and Anderson. Let CpCp be normal, ...