School of Biological, Physical, Mathematics & Actuarial Sciences: Recent submissions

Now showing items 61-80 of 253

    • Fixed Points Approximation for Non Expansive Operators in Hilbert Spaces 

      Okelo, N. B. (Int. J. Open Problems Compt. Math, 2/2/2021)
      Approximations of fixed points have been done in different space and classes. However, characterizations in norm attainable classes remain interesting. This paper discusses approximation of nonexpansive operators in Hilbert ...

    • Knockdown of Cytochrome P450 Genes Gh_D07G1197 and Gh_A13G2057 on Chromosomes D07 and A13 Reveals Their Putative Role in Enhancing Drought and Salt Stress Tolerance in Gossypium Hirsutum 

      Magwanga, Richard Odongo; Lu, Pu; Kirungu, Joy Nyangasi; Dong, Qi; Cai, Xiaoyan; Zhou, Zhongli; Wang, Xingxing; Hou, Yuqing; Xu, Yanchao; Peng, Renhai; Agong, Stephen Gaya; Wang, Kunbo; Fang, Liu (Multidisciplinary Digital Publishing Institute, 2019-03)
      We identified 672, 374, and 379 CYPs proteins encoded by the CYPs genes in Gossypium hirsutum, Gossypium raimondii, and Gossypium arboreum, respectively. The genes were found to be distributed in all 26 chromosomes of the ...

    • Reconstructing Global Earth Observation Based Vegetation Index Records with Stochastic Partial Differential Equations Approach 

      Okuto, E; Omolo, B; Ongati, O (Academia, 2018)
      Long-term Earth observation based vegetation index records have been used extensively by researchers to assess vegetation response to global climate variability and change. However, the records exhibit multiple temporal ...

    • Performance Evaluation Criteria of Credit Scoring Models for Commercial Lenders 

      Bakker, Daniel K; Odundo, F; Nyakinda, J; Paul, Samuel F (International Journal of Mathematics Trends and Technology, 2019-07)
      Credit scoring has been regarded as a main tool of different companies or banks during the last few decades and has been widely investigated in different areas, such as finance and accounting. Different scoring techniques ...

    • Sum Construction of Automorphic Symmetric Balanced Incomplete Block Designs 

      Otulo, C.W.; Muga, Zablon; Okelo, Nyaare; Nyakinda, J.O. (International Journal of Scientific Research in Mathematical and Statistical Sciences, 2020-08)
      In this study Sum construction method of automorphic symmetric balanced incomplete block designs has been presented in details. Efficiency of a test design used in the Sum construction of automorphic symmetric balanced ...

    • Relative Efficiency of Sum Constructed Automorphic Symmetric Balanced Incomplete Block Designs 

      Otulo, C.W.; Muga, Z.M.; Okelo, N.B.; Nyakinda, J.O. (ResearchGate, 2020)
      Several construction methods have been introduced to build the elements of BIBDs’ for specific parameters, with different techniques suggested for testing their existence, still no general technique to determine the ...

    • On the Effects of Motocycle Accidents and its Trends (A Case of Kenya) 

      Maua, Muga Zablon; Ongati, Naphtali Omollo; Orwa, George Otieno (JKUAT press, 2016)
      This study analyzes recent data of accidents’ prevalence in Kenya and investigates whether there might be new trends in areas formerly not prone to accidents. Polynomials of order 6 are found best suited for accidents’ ...

    • Effect of Sampling Bias on the Family of Exponential Random Graph Models 

      Warutumo, Paul Wachiuri; Orwa, George Otieno; Muga, Zablon Maua (International Journal of Statistics and Applied Mathematics, 2019)
      There is increased use and application of exponential random graphs emanating from use of big data and other techniques. This study sought to establish how sampling bias affects the exponential random graphs. This study ...

    • Forecasting Monthly Sugar Cane Yields Using Box-Jenkin’s Predictive Models in Kenya 

      Kwamboka, Lydiah; Orwa, George Otieno; Muga, Zablon Maua (International Journal of Statistics and Applied Mathematics, 2019-10-24)
      Sugarcane is the main raw material in the production of sugar in Kenya. The supply of sugarcane affects directly the quantity of sugar supplied in the markets. Low supply of sugarcane leads to a decline in the amount of ...

    • Survival Analysis of Broilers in Two Poultry Farms in Kaloleni Sub County 

      Ngolo, Ndurya; Muhua, George; Okuto, Erick (International Journal of Statistics and Applied Mathematics, 2018)
      This research is about a survival analysis on broilers in two poultry farms in Kaloleni sub-county. Chapter one gives an insight into the introduction of the paper, chapter two discusses the methodology used, chapter three ...

    • Sensitivity Analyses of Population Projection Matrix of Cestrum Aurantiacum 

      Ojung’a, S.O; Nyakinda, J.O; Okuto, E; Mullah, J.A (Kenya Forestry Research Institute/Jaramogi Oginga Odinga University of science and Technology., 2020)
      The Lefkovitch stage specific matrix population models are divided into discrete stage classes defined by a growth variable such as size, height and diameter at breast height for trees. In matrix model, the deterministic ...

    • Extensions of Lefkovitch Matrix for Modeling Invasive Cestrum Aurantiacum Population Dynamics 

      Ojunga, S.O.; Nyakinda, J.O; Okuto, E.; Mullah, J.A (KEFRI/, Jaramogi Oginga Odinga University of science and Technology., 2020)
      Modeling of invasive species using stage based matrix methods can be exploited to understand population dynamics of plants using stage based Leftkovitch matrix models. This study reviewed and extended the stage based matrix ...

    • Recurrent Malaria in Kenya: Survival Distribution and Equality of Survival Distribution 

      James, Ondulo; Erick, Okuto; Maua, Muga; Dickens, Omondi; Charles, Obonyo (ResearchGate, 2017-12)
      Malaria is a leading cause of morbidity and mortality in Kenya, mostly affecting the rural poor, especially young children and pregnant women. Most clinical studies in malaria involve a number of equally important endpoints. ...

    • Fitting a Markovian Queuing Model to Bus Park Revenue Collection Point in Kisii Town, Kenya 

      Ongiri, Hudson Nyang’wara; Orwa, George Otieno; Muga, Zablon Maua (International Journal of Statistics and Applied Mathematics, 2019)
      In queuing theory one deals with the mathematical analysis of the performance of queuing systems. In our daily lives customers encounter queues while seeking services in institutions. The increase in the number of customers ...

    • Modeling Household Water Demands Using Sinusoidal Models 

      Onyoni, Robert Orwenyo; Orwa, George Otieno; Muga, Zablon Maua (International Journal of Statistics and Applied Mathematics, 2019)
      Household water in Kenya is used in agricultural activities, industrial activities and other uses. A lot of water is consumed by indoor appliances. The water management strategy affects the household demand for water. The ...

    • Spatial Motion of Multi-Pendula Systems 

      Prichani, JS; Sakwa, TW; Ongati, N.O. (International Journal of Science and Research, 7/7/2017)
      A multiple chain pendula system constrained to move in space has been studied within the framework of a generalized coordinate system by using the Lagrangian formalism. Equations of motions for many body pendula systems ...

    • On Tensor Products and Elementary Operators 

      Achieng, Otieno E.; Okelo, Benard; Ongati, Omolo (Core, 2018)
      In this paper we describe operator systems and elementary operators via tensor products. We also discuss norms of elementary operators.

    • Wilson-Theta Algorithm Approach to solution of Dynamic Vibration Equations 

      Aminer, Titus J. O.; Okelo, N. B. (ResearchGate, 2014)
      In this paper, we examine conservative autonomous dynamic vibration equation, x¨ = − tanh2 x, which is time vibration of the displacement of a structure due to the internal forces, with no damping or external forcing. ...

    • Lie Symmetry Solution of Fourth Order Nonlinear Ordinary Differential Equation: (yy'(y(y') -1)'')'=0 

      Aminer, T. J. O.; Ongati, N. Omolo; Okoya, M. E. Oduor (International Journal of Multidisciplinary Sciences and Engineering, 2017-10)
      The equation F(x, y, y, y, y, y (4))  0 is a one-space dimension version of wave equation. Its solutions can be classified either as analytic or numerical using finite difference approach, where the convergence of ...

    • Determining Equations of Fourth Order Nonlinear Ordinary Differential Equation 

      Aminer, T.J (ResearchGate, 2018)
      Determining Equations are linear partial differential equations. The equation to be solved is subjected to extension generator. The coefficient of unconstrained partial derivatives is equated to zero and since the equations ...