Articles

Browse our published research articles

193 articles
111
Research Article DOI: 10.67897/njma.2019.oifrrfxp

A Truncated Acceptance Sampling Inspection Plans for Finite and Infinite Lot Under Rayleigh Distribution

J. O. Braimah*, d I. W. Edokpa

In this paper, single and double acceptance sampling plans were developed when the product life time follows a Rayleigh Distri bution. The sample size (n) and Average Sample Number (ASN) for single and double sampling plans respectively were developed. The operating characteristic values for the two sampling plans were also obtained. The sampling plans were also obtained for various values of the ...

Apr, 2019 pp. 102−117 10 views 8 downloads
112
Research Article DOI: 10.67897/njma.2022.yw3rpfga

Application of Laplace Beltrami Equation to Solve Vortex Flow in a Closed Cylinder with Dirichlet Boundary Condition

S. O. Momoh*, S. A. Aniki, U. F. Amoo

The guiding equation here happens to be the Laplacian for Cylinder, the equation was obtained by using the known definition of differential operator for Cylindrical coordinates (rho, theta, z), it was then decomposed into three Partial Differential Equation (PDE) by variable separable methods and solved independently to obtain the general solution. Finally, contour plots of the solution describing...

Jun, 2022 pp. 104-116 10 views 4 downloads
113
Research Article DOI: 10.67897/njma.2019.arbbhn6f

Optimal Control Analysis of an SIRS Epidemic Model with the Asymptotic Transmission

E. A. Bakare*, O. Olubosede, E. B. Are

In this paper, we developed and analysed a SIRS(Susceptible-Infected-Recovered-Susceptible) epidemic model that capturesthe asymptotic transmission in the presence of two controlinterventions (vaccination and treatment). Non-linear deter-ministic system of di erential equations was used to capturethe asymptotic transmission of the SIRS epidemic model andthe basic reproduction number, R0, with the ...

Dec, 2019 pp. 104-128 5 views 6 downloads
114
Research Article DOI: 10.67897/njma.2014.czkk37n9

A NOTE ON A CHARACTERIZATION OF LOCAL NULL SEQUENCE

SUNDAY OLUYEMI*

We replace an arbitrary sequence of positive real numbers by a sequence of positive integers in a characterization of local null sequence, and consequently procure an example of a separated locally convex space in which convergence is Mackey.

Jun, 2014 pp. 105-109 3 views 5 downloads
115
Research Article DOI: 10.67897/njma.2022.acp7p281

Diagonally Implicit 2-Point Block Backward Differentiation Formula With Two Off-Step Points For Solving Stiff Initial Value Problems

Hamisu Musa*, Alhassan Buhari, Naghmeh Abasi

A diagonally implicit form of the 2-point block backward differentiation formula (BDF) with two off-step points is developed for solving stiff initial value problems. The method is derived by introducing a lower triangular matrix in the coefficient matrix of the existing 2-point block BDF method with off-step points for solving stiff ordinary differential equations. The method approximates two sol...

Dec, 2022 pp. 108-119 8 views 4 downloads
116
Research Article DOI: 10.67897/njma.2021.e35txbt7

A Bootstrap Approach to Cumulative Sum (CUSUM) and Exponentially Weighted Moving Average (EWMA) Control Charts for Monitoring Process Means

J. O. Braimah*, S. A. Omotoso, O. Ikpotokin, E. M. Ogbeide

This research proposed a bootstrapped method for setting control boundaries and detecting out-of-control signals. The proposed approaches for determining control limits are designed to address the issues of distributional assumptions and out-of-control signal detection. It enables the setting of control limits, which can improve the detection of the out control signal, according to the results of ...

Jul, 2021 pp. 108−129 10 views 4 downloads
117
Research Article DOI: 10.67897/njma.2018.9waubmlz

Unsteady Mhd Oscillatory Flow Through A Porous Channel Saturated With Porous Medium

S. A. Onitilo*

In this paper, we investigate the effect of suction/injection on the unsteady oscillatory flow through a vertical channel with non-uniform wall temperature. The fluid is subjected to a transverse magnetic field, and the velocity slip at the lower plate is taken into consideration. Exact solutions of the dimensionless equations governing the fluid flow are obtained, and the effects of the flow para...

Jun, 2018 pp. 108-115 3 views 4 downloads
118
Research Article DOI: 10.67897/njma.2020.miaa05xp

Analysis of High-Pressure Transient flow in Pipeline of Hydrogen-Natural Gas Mixture

Baba Galadima Agaie*, S. Magaji Abubakar, Baba Ibrahim Mundi, Peter Anthony

Hydrogen is a high pressure gas whose natural mixture requires accurate prediction of pressure drop. The reduced order mod elling is used in analysis of transient flow where viscosity change is neglected leading to Euler equation which becomes the governing equation. This study provides an improvement on the accurate prediction of pressure drop analysis of transient flow of hydrogen natural gas mi...

Aug, 2020 pp. 111−120 13 views 3 downloads
119
Research Article DOI: 10.67897/njma.2016.l3k9u55b

Existence and Uniqueness of Solution of Ebola Virus Disease Model with Contact Tracing and Quarantine as Controls

C. E. Madubueze*, A. R. Kimbir, E. S. Onah, T. Aboiyar

In this paper, we begin the study of the transmission dynamics of a model of Ebola Virus disease (EVD) incorporating contact tracing and quarantine as control measures. Furthermore, we present the proof of the existence and uniqueness of the solution of the model.

Jun, 2016 pp. 111-121 3 views 4 downloads
120
Research Article DOI: 10.67897/njma.2015.393kvf2h

Gradient Analysis in pipe networking for Domestic water supply system in transient flow

Aiyesimi Y. M*, Effiom Uket Effiom, Gbolahan Bolarin

Transient flow in water distribution networks is studied using the Gradient Method. In an attempt to obtain solutions rapidly, a computer program has been developed in FORTRAN 77. The computer program developed herein is general, easy to use, and allows a dynamic analysis of complex looped and open water distribution networks. Piezometric heads at nodes and flow rates in pipes are computed for wat...

Dec, 2015 pp. 112−127 12 views 5 downloads