Volume 7, Issue 1 (2011) | Journal of Mathematics and Statistics

Estimating the Parameters of the Negative-Lindley Distribution using Broyden-Fletcher-Goldfarb-Shanno

Naushad Mamode Khan — 2011-01-29

Journal of Mathematics and Statistics, Published online: 29 January 2011; doi:10.3844/jmssp.2011.1.4

Problem statement: The Maximum Likelihood Estimation (MLE) technique is the most efficient statistical approach to estimate parameters in a cross-sectional model. Often, MLE gives rise to a set of non...

Constrained Response Surface Optimization for a Laser Beam Welding Process

Pongchanun Luangpaiboon — 2011-01-29

Journal of Mathematics and Statistics, Published online: 29 January 2011; doi:10.3844/jmssp.2011.5.11

Problem statement: On a current operating condition of a laser beam welding process in the hard disk drive industry, it has been found that shear strength of the head support and suspension assembly i...

Periodic Review Probabilistic Multi-Item Inventory System with Zero Lead Time under Constraint and Varying Holding Cost

Naglaa Hassan El-Sodany — 2011-01-29

Journal of Mathematics and Statistics, Published online: 29 January 2011; doi:10.3844/jmssp.2011.12.19

Problem statement: This study treats the probabilistic safety stock n-items inventory system having varying holding cost and zero lead-time subject to linear constraint. Approach: The expected total c...

Time Series Forecasting by using Seasonal Autoregressive Integrated Moving Average: Subset, Multiplicative or Additive Model

Suhartono — 2011-01-29

Journal of Mathematics and Statistics, Published online: 29 January 2011; doi:10.3844/jmssp.2011.20.27

Problem statement: Most of Seasonal Autoregressive Integrated Moving Average (SARIMA) models that used for forecasting seasonal time series are multiplicative SARIMA models. These models assume that t...

On Computing of Eigenvalues of Differential Equations Q = λP with Eigenparameter in Boundary Conditions

S. M. Al-Harbi — 2011-01-29

Journal of Mathematics and Statistics, Published online: 29 January 2011; doi:10.3844/jmssp.2011.28.36

Problem statement: Our purpose of this study is to use sinc methods to compute approximately the eigenval-ues of second-order operator pencil of the form Q-λP. Approach: Where Q is second order self ...

Mathematical Genesis of the Spatio-Temporal Covariance Functions

Gema Fernández-Avilés — 2011-01-31

Journal of Mathematics and Statistics, Published online: 31 January 2011; doi:10.3844/jmssp.2011.37.44

Problem statement: Obtaining new and flexible classes of nonseparable spatio-temporal covariances have resulted in a key point of research in the last years within the context of spatiotemporal Geos...

New Family of Exact Soliton Solutions for the Nonlinear Three-Wave Interaction Equations

Sahar M. Alqaraleh — 2011-01-31

Journal of Mathematics and Statistics, Published online: 31 January 2011; doi:10.3844/jmssp.2011.45.50

Problem statement: To obtain new exact traveling wave soliton solutions for the threewave interaction equation in a dispersive medium and a non zero phase mismatch. Approach: The tanh method is usua...

Fuzzy Parametric Deduction for Material Removal Rate Optimization

Tian-Syung Lan — 2011-01-31

Journal of Mathematics and Statistics, Published online: 31 January 2011; doi:10.3844/jmssp.2011.51.56

Problem statement: A general optimization scheme without equipment operations for CNC (computer numerical control) finish turning is deemed to be necessarily developed. Approach: In this study, four...

Analysis of a Two Unit Standby Oil Delivering System with a Provision of Switching Over to another System at Need to Increase the Availability

Upasana Sharma — 2011-01-31

Journal of Mathematics and Statistics, Published online: 31 January 2011; doi:10.3844/jmssp.2011.57.60

Problem statement: The study deals with a standby system consisting of two units. Initially one unit is operative and the other is standby. When both the units are failed then there is a provision o...

Dividend Maximization in the Cramer-Lundberg Model using Homotopy Analysis Method

Juma Kasozi — 2011-01-31

Journal of Mathematics and Statistics, Published online: 31 January 2011; doi:10.3844/jmssp.2011.61.67

Problem statement: We used the Homotopy Analysis Method (HAM) to numerically compute the value function of the dividend payment in the basic insurance process. Approach: The process is a constant in...

A Note on the Numerical Solution for Fredholm Integral Equation of the Second Kind with Cauchy kernel

M. Abdulkawi — 2011-03-25

Journal of Mathematics and Statistics, Published online: 25 March 2011; doi:10.3844/jmssp.2011.68.72

Problem statement: In this study, numerical solution for the Fredholm integral equation of the second kind with Cauchy singular kernel is presented. Approach: The Chebyshev polynomials of the second...

Disjoint Sets in Graphs and its Application to Electrical Networks

Ford Lumban Gaol — 2011-03-25

Journal of Mathematics and Statistics, Published online: 25 March 2011; doi:10.3844/jmssp.2011.73.77

Problem statement: One of the well known problems in Telecommunication and Electrical Power System is how to put Electrical Sensor Unit (ESU) in some various selected locations in the system. Approa...

Remark on Bi-Ideals and Quasi-Ideals of Variants of Regular Rings

Samruam Baupradist — 2011-03-25

Journal of Mathematics and Statistics, Published online: 25 March 2011; doi:10.3844/jmssp.2011.78.80

Problem statement: Every quasi-ideal of a ring is a bi-ideal. In general, a bi-ideal of a ring need not be a quasi-ideal. Every bi-ideal of regular rings is a quasi-ideal, so bi-ideals and quasi-idea...

Half-bounded Numerical Solution of Singular Integral Equations with Cauchy Kernel

M. Abdulkawi — 2011-03-25

Journal of Mathematics and Statistics, Published online: 25 March 2011; doi:10.3844/jmssp.2011.81.85

Problem statement: In this study, a numerical solution for singular integral equations of the first kind with Cauchy kernel over the finite segment [-1,1] is presented. The numerical solution is bou...

An Application of Univariate Statistics to Hotelling's T²

Dr. A. Polymenis — 2011-03-25

Journal of Mathematics and Statistics, Published online: 25 March 2011; doi:10.3844/jmssp.2011.86.94

Problem statement: Hotelling's T2 statistic has been well documented in the existing literature and exact as well as asymptotic results have been obtained. In the present article, we focus on an imp...

Volume 7, Issue 1 (2011) | Journal of Mathematics and Statistics

Estimating the Parameters of the Negative-Lindley Distribution using Broyden-Fletcher-Goldfarb-Shanno

Constrained Response Surface Optimization for a Laser Beam Welding Process

Periodic Review Probabilistic Multi-Item Inventory System with Zero Lead Time under Constraint and Varying Holding Cost

Time Series Forecasting by using Seasonal Autoregressive Integrated Moving Average: Subset, Multiplicative or Additive Model

On Computing of Eigenvalues of Differential Equations Q = λP with Eigenparameter in Boundary Conditions

Mathematical Genesis of the Spatio-Temporal Covariance Functions

New Family of Exact Soliton Solutions for the Nonlinear Three-Wave Interaction Equations

Fuzzy Parametric Deduction for Material Removal Rate Optimization

Analysis of a Two Unit Standby Oil Delivering System with a Provision of Switching Over to another System at Need to Increase the Availability

Dividend Maximization in the Cramer-Lundberg Model using Homotopy Analysis Method

A Note on the Numerical Solution for Fredholm Integral Equation of the Second Kind with Cauchy kernel

Disjoint Sets in Graphs and its Application to Electrical Networks

Remark on Bi-Ideals and Quasi-Ideals of Variants of Regular Rings

Half-bounded Numerical Solution of Singular Integral Equations with Cauchy Kernel

An Application of Univariate Statistics to Hotelling's T2

An Application of Univariate Statistics to Hotelling's T²