Volume 4, Issue 1 (2008) | Journal of Mathematics and Statistics

Boundary Effect on Marangoni Convection in a Variable Viscosity Fluid Layer

N.Z. Abidin — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.1.8

The onset of Marangoni convection in a horizontal fluid layer with a free surface overlying a solid layer heated from below is studied. Problem is focused on the effect of the solid layer depth or its...

Maximum Principles for Second Order Elliptic Equations in Nondivergence Form and Applications

Mohammad Al-Mahameed — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.9.14

The main objectives of this study were to introduce a maximum principle for second order elliptic equations in nondivergence form and to use a nondivergence technique called the ABP method to establis...

Rounding Theorem the Possibility of Applying the Cryptosystems on the Decimal Numbers

Rand Alfaris — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.15.20

The possibility of using the decimal numbers in cryptography as the base of the encryption and decryption is proposed by introducing the "Rounding Theorem". Until now, cryptosystems are used the integ...

Transient Solution of the M/M/C₁ Queue with Additional C₂ Servers for Longer Queues and Balking

R. O. Al-Seedy — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.21.25

The goal of this research is to discuss the M/M/C1 queue with additional C2 servers for longer queues and balking. By using generating function technique the transient probabilities are derived in ter...

Construction of Control Charts Using Fuzzy Multinomial Quality

V. Amirzadeh — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.26.31

Control charts are the simplest type of on-line statistical process control techniques. One of the basic control charts is P-chart. In classical P-charts, each item classifies as either "nonconformi...

On Sandwich Theorems of Analytic Functions Involving Noor Integral Operator

Rabha W. Ibrahim — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.32.36

In this research, we introduce sufficient conditions for subordination and superordination for subclass of analytic functions containing Noor integral operator.

Integral Dissipative Set-valued Maps

M. O. Ogundiran — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.37.40

Integral dissipativity arises over a period of time. This dissipativity for multivalued maps has some intrinsic properties together with their convexification. The space of Aumann integrable maps endo...

Numerical Study of Tsunami Waves with Sloping Bottom and Nonlinear Friction

Agustinus Ribal — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.41.45

In this paper we investigate the breaking of long-waves propagating on shallow water with nonlinear friction on the sloping bottom. A complete set of equations is presented and a numerical method is d...

An Operator Defined by Convolution Involving the Polylogarithms Functions

K. Al Shaqsi — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.46.50

We define an operator on the class A of analytic functions in the unit disk U = {z :|z | < 1} involving the polylogarithms functions and introduce certain new subclasses of A using this operator. Som...

Framework of Regression-Based Graph Matrix Analysis Approach in Multi-Relational Social Network Problem

Ford Lumban Gaol — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.51.57

Community mining is one of the major directions in social network analysis. Social network analysis has attracted much attention in recent years. Most of the existing methods on community mining assum...

A New Approach for Solving Second Order Ordinary Differential Equations

Laith K. AL-Hwawcha — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.58.59

A new approach is presented to solve second order linear differential equations with variable coefficients and some illustrative examples are given.

Percentile Double Ranked Set Sampling

Amer Ibrahim Al-Omari — 2008-03-31

Journal of Mathematics and Statistics, Published online: 31 March 2008; doi:10.3844/jmssp.2008.60.64

In this paper, percentile double ranked set sampling (PDRSS) method is suggested for estimating the population mean. The PDRSS method is compared with the simple random sampling (SRS), ranked set samp...