Volume 1, Issue 2 (2005) | Journal of Mathematics and Statistics

Numerical Simulation of a Turbulent Lean, Premixed Combustion with an Explicit Algebraic Stress Model

William Vicente — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.86.90

A computational model is used in the present paper to study the influence of the turbulence modeling on the chemical species in a turbulent lean premixed flame. The simulated configuration is about a ...

A Repairable System with N Failure Modes and K Standby Units Using Separation of Variable Method

Kh. M. El-Said — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.91.94

This study deals with a repairable system with N failure modes and K standby unit. Using separation of variable method by solving linear ordinary differential equation for system equations obtained by...

Approximation Methods for Fixed Points of Quasi-contractive Mappings in Arbitrary Real Banach Spaces

Olusegun O. Owojori — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.95.102

Owojori and Imoru [1] introduced some iteration methods and investigated its convergence for pseudocontractive and accretive operators in arbitrary Banach spaces. In this work, strong convergence resu...

On Selecting "r" Items From "m" Independent Groups

Ezz H. Abdelfattah — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.103.105

doesn’t consider the competition “between” these groups, but it only considers the competition “within” the groups. In this study we discuss the selection by considering the competition with...

Analysis of the Chord Length Distribution Along an Edge: The Wedge Case and the Quadratic Rod Case

Wilfried Gille — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.106.112

The analytic expression is given for the chord length distribution density f(l,b) along the edge of an infinitely long rectangular wedge and for a quadratic rod, both of constant breadth b. The genera...

Firms: A Dynamic Reading of Corporate Behaviour

Damien Bazin — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.113.114

This study proposes to re-examine a dynamic managerial model. Its aim is to highlight the ambivalence of the dynamic approach regarding a firm’s behavioural strategies for optimisation.

On Hypersurfaces of Hessian Manifolds with Constant Hessian Sectional Curvature

Mehmet Bektas — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.115.118

In this study, we give one instrinsic inequality for Riemannian hypersurfaces in Hessian manifolds and sufficient and necessary condition for such hypersurfaces to be totally geodesic.

Evaluation of Reliability and Availability Characteristics of Two Different Systems by Using Linear First Order Differential Equations

Khaled M. El-Said — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.119.123

This study deals with the reliability and availability characteristics of two different series system configurations. The second system differs from the first system due to the additiona...

Computing ULV Decomposition by Divide Conquer Method

Hasan Erbay — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.124.128

The ULV decomposition (ULVD) is an important member of a class of rank-revealing two-sided orthogonal decompositions used to approximate the Singular Value Decomposition (SVD). The ULVD can be modifie...

On Concircular Structure Spacetimes

A. A. Shaikh — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.129.132

This study presents a study of concircular structure spacetimes which are connected 4-dimensional Lorentzian concircular structure manifolds.

Strong Convergence Theorems for Fixed Points of Asymptotically Nonexpansive Mappings in Uniformly Smooth Banach Spaces

Olusegun Olawale Owojori — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.133.141

In this work, we establish strong convergence of the improved modified three-step iteration methods for asymptotically nonexpansive operators in uniformly smooth and convex Banach spaces. Our results ...

On the Relations among Characteristic Functions of Theta Functions

Ismet Yildiz — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.142.145

In this study, using the characteristic values $\begin{bmatrix} \varepsilon\\ \varepsilon' \end{bmatrix} = \begin{bmatrix} 1\\ 1 \end{bmatrix}, \begin{bmatrix} 1\\ 0 \end{bmatrix}, \begin{bmatrix} 0\\...

Dynamics of Infected Snails and Mated Schistosoma Worms within the Human Host

G. Besigye-Bafaki — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.146.152

Male and female worms are independently distributed within a human host each with a Poisson probability distribution mass function. Mating takes place immediately when partners are available. It was f...

On the Elliptic Function Arising from the Theta Functions and Dedekind's η-Function

Ismet Yildiz — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.153.159

It's a reality that there is a relationship between the sigma function of Weierstrass and theta functions. An elliptic function can be set up using the theta functions just as it can be astablished wi...

Busy Period Analysis of a Man-machine System Operating Subject To Different Physical Conditions

G S. Mokaddis — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.160.164

This study deals with some characteristics of a single-unit of a man-machine system operating under different physical conditions. The failure, repair and change of physical conditions (good-poor) ar...

Korovkin and Weierstrass Approximation via Lacunary Statistical Sequences

Richard F. Patterson — 2005-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2005; doi:10.3844/jmssp.2005.165.167

In this study we shall extended Korovkin and Weierstrass approximation theorem to lacunary statistical convergent sequences. In addition, to these approximation theorems, we established also introdu...