Volume 24, Issue 1 (May)

Articles in this Issue

24 articles
1
Research Article

Application of Assignment Model in Optimizing Cost of a Building Project

Nyor Ngutor*, Olaniyan Toyin, Ladi Kevin

The study sought to minimize the total cost of building a three bed-room Detached House in Minna. An Assign ment problem was formulated and using Hungarian solu tion method, a realistic result was obtained. The sighting study with unpopular scenario in building recommended the sum of N3,885,000 which can be used to build a house of the type and specifications as provided in the study.

Dec, 2015 pp. 01−12 1 views
2
Research Article

HYDROMAGNETIC BOUNDARY-LAYER FLOW OF A NANOFLUID PAST A STRETCHING SHEET EMBEDDED IN A DARCIAN POROUS MEDIUM WITH RADIATION

Yusuf A*, Aiyesimi Y. M, Jiya M.

The problem of laminar fluid flow which results from the stretching of a flat surface in a nanofluid has been obtained using the Adomian Decomposition Method. The model used for the nanofluid was presented in its rectangular form. The model is considered in a porous medium and incorporates the magnetic effect, thermal radiation effect and the effect of Brownian motion and thermophoresis. A similar...

Dec, 2015 pp. 13−29
4
Research Article

MOBILE DIGITAL CASH PAYMENT FOR MOBILE PHONE USERS

Usman F*, Olabiyisi S. O, Emuoyibofarhe O. J

As mobile communications become increasingly sophisticated and ubiquitous, the use of portable devices aims to exploit the increasing processing power of these consumer devices. This paper proposes a new computing model that tries to provide user mobility service to all applications through a system-level solution. It present the design and implementation of a model for mobile computing called Web...

Aug, 2026 pp. 39−46
7
Research Article

THE COUNTERPART OF A RESULT OF WEBB FOR THE BOUNDED DUAL Eb

SUNDAY OLUYEMI*

Denote by E, E+ andEb the continuous dual, the sequential dual and the bounded dual, respectively, of the lcs(E,τ). Well-known is that, [1, 22.2, p.87][2. Proposition 2.5.7, p.107], f ∈ E ⇐⇒ kerf is closed. John Webb added that, [5, Proposition 1.9., p.345], f ∈ E+ ⇐⇒ kerf is sequentially closed. I, hereby, add that f ∈ Eb ⇐⇒ kerf is locally closed. The result substantially improves             [4...

Dec, 2015 pp. 62−66
8
Research Article

A Seventh-order Block Integrator for Solving Stiff Systems

B. I. Akinnukawe*, S. A. Okunuga

In this paper, an L0- stable Second Derivative Block Integrator of uniform order seven is proposed for the numerical integration of stiff systems, including large stiff systems resulting from semi discretization of Parabolic differential equations. The conven tional 3-step second derivative backward differentiation formula is obtained from a continuous scheme while the additional methods are obtai...

Dec, 2015 pp. 67−78
9
Research Article

Mathematical Analysis of Draw-Down Level and Its Effect On Crop Yield

M. D. Shehu*, O. P. Evans, H. O. Ahmed, I. A. Adeniyi

In this paper, we formulated mathematical equations for ground water flow considering the Draw-down levels in an unconfined Aquifer system, using the parameters; well pumping rate, hydraulic conductivity, transitivity, radius of influence. Different draw-down levels for different wells were determined in an unconfined aquifer system. Relating the draw-down level to crop production (Maize yield) sh...

Dec, 2015 pp. 79−86
10
Research Article

FIVE SHORT NOTES ON BOUNDED MAPS

SUNDAY OLUYEMI*

This paper contributes five observations on bounded maps: (i) An observation on the definition of a bounded set, (ii) Three characterizations of bounded linear maps that parallel the usual general topology characterizations of continuity, (iii) An analogue of [2, PROPOSITION 3.12.1 p.254][7, Lemma 11.1.1, p.164] for bounded maps, (iv) That the Banach-Steinhaus Closure Theo rem is also true for bou...

Dec, 2015 pp. 87−99
11
Research Article

A REVIEW OF THE Pth MOMENT EXPONENTIAL STABILITY AND ALMOST SURE EXPONENTIAL STABILITY OF NON-LINEAR STOCHASTIC DELAY DIFFERENTIAL EQUATIONS WITH CONSTANT TIME LAG.

Augustine Omoghaghare Atonuje*

The paper tries to connect the pth- moment exponential stability and the almost sure exponential stability of non-linear stochastic delay differential equations (SDDEs) with small time lag. It is generally true that the pth- moment exponential stability of SDDEs and the almost sure exponential stability do not imply each other. By applying the Lyapunov function and an idea of generalized moment in...

Aug, 2026 pp. 100−111
12
Research Article

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
13
Research Article

APPLICATION OF HOMOTOPY PERTURBATION METHOD (HPM) FOR THE SOLUTION OF NANOFLUIDS OVER A POROUS STRETCHING SURFACE

U. Mohammed*, A. A. Mohammed, A. I. Ma’ali, E. O. Titiloye

In this study, by means of homotopy perturbation method (HPM) and sixth order Runge-Kutta method an approximate analytical and numerical solutions of the of viscous ag-water and Cu-water nanofluids over a porous stretching surface is obtained. Graphical results are presented to investigate the influence of the nanoparticles volume fraction parameter and suction/injection parameter on the velocity ...

Dec, 2015 pp. 128−136
14
Research Article

On The Strength of Agreement Between Students’ Initial and Final Academic Performances In Nigeria University System

A. W. Banjoko*, Yahya W. B., H. S. Abiodun, M. O. Adeleke, B. Afolayan, M. K. Garba, Olorede K. O., K. A. Dauda

This paper examines the strength of agreement between academic performances of students after their first and final years in the University. Academic performances of a total of 886 students that were admitted into various academic programs in the Faculty of Science, University of Ilorin, during the 2008/2009 academic session were followed-up to their year of graduation in 2012. Information on the ...

Aug, 2026 pp. 137−156
16
Research Article

Adomian Decomposition Method (ADM) Solution of Boundary Layer Flow Past a Stretching Plate with Heat Transfer, Viscous Dissipations, and Grashof Number

Yusuf A*, Jiya M, Tsadu S

The research work focuses on the solution of Magnetohydrody namics (MHD) boundary layer flow past a stretching plate with heat transfer and viscous dissipation. The non-linear of momen tum and energy equation are transformed into ordinary differential equation using similarity transformation, the resulting equations were solved using Adomian decomposition method (ADM). An attempt has been made to ...

Dec, 2015 pp. 165−175
17
Research Article

Functions Defined by Product of Geometric Expressions

F. M. JIMOH*, K. O. Babalola

We introduce a new class, Jα n(β), of analytic and univa lent functions defined by product of geometric expres sions. The univalence of functions in the new class as well as sufficient inclusion condition is established. The radius of convexity for the class J1 0(β) is also obtained.

Dec, 2015 pp. 176−183
19
Research Article

On the use of Statistical Power in Examining Changes in Rainfall

Obisesan K. O*

The main objective of statistical analysis is to make inference. One way of doing this is through Hypothesis Testing and Post-hoc power analysis which can be applied to environmental phenomena such as rainfall. Rainfall is an important element in understanding the climatic condition of any environment. In this work, tests of hypothesis and post-hoc power analysis are carried out using monthly rain...

Dec, 2015 pp. 193−215 1 views
20
Research Article

A Modified Interior Penalty Function Method for Constrained Optimization Problems

Catherine N. Ejieji*, J. Yohanna

Amodified Interior penalty function method algorithm for solving non-linear constrained optimization problems is presented in this work. The modified scheme was achieved by introducing a new function to the existing method and the proof of convergence for the new function is established. The modified algorithm is used to solve numerical examples and the results obtained show that the proposed inte...

Dec, 2015 pp. 216−227
21
Research Article

Flow of an Incompressible MHD Third Grade Fluid Through a Cylindrical Pipe with Isothermal Wall and Joule Heating

Aiyesimi Y. M*, Okedayo G. T, Obi B. I

In this paper, we considered the flow of an incompressible MHD third grade fluid through a cylindrical pipe with isothermal wall and Joule heating. Axial pressure-gradient was assumed to have induced the motion. The governing equations of the flow field are solved using perturbation method. Results are presented.

Dec, 2015 pp. 228−236
22
Research Article

Mathematical Recipe for Curbing Human Papillomavirus Transmission Dynamics

Abdulrahman S*, Popoola S. O, Yusuf I

A mathematical model for the transmission dynamics and control of Human Papillomavirus (HPV) was developed incorporating the impact of vaccination and condom usage. The effective reproduction number (Rc) was obtained and used to find the best recipe for curbing transmission of the disease. Using Nigerian demographic data, numerical simulations revealed that 20% HPV vaccination coverage of sexually...

Dec, 2015 pp. 237−251 1 views
23
Research Article

On a Hybrid Cryptography System for Data Using Advanced Encryption Scheme (AES) and Ron Rivest Shamir Adleman (RSA) Algorithms

A. O. Babatunde*, M. O. Mohammed

Nowadays, the use of information technology has taken over so many sectors. The survivals of many organizations are based on the information that is received or sent out. Due to the dependency on an unsecure communication network, some information that is confidential to the organization is revealed to an unauthorized user and this has necessitated the need for data security. This research work th...

Dec, 2015 pp. 252−260
24
Research Article

A NEW NUMERICAL METHOD FOR THE SOLUTION OF INITIAL VALUE PROBLEMS

Abolarin O. E*, Akingbade S. W

A method of representing the exact solution to the initial value problem by an interpolating function is considered to generate a numerical method which enjoys the higher-order advantage over all the existing methods. The algorithm de veloped is coded using MATLAB programming application language towards its applicability. The effectiveness of the proposed method is tested and therefore found to c...

Dec, 2015 pp. 261−267
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