Volume 12, Issue 4 (2016) | Journal of Mathematics and Statistics

New Bivariate Wrapped Distributions

S. Nadarajah — 2016-11-24

Journal of Mathematics and Statistics, Published online: 24 November 2016; doi:10.3844/jmssp.2016.206.212

There are not many models for bivariate directional data. Here, we introduce more than ten new bivariate wrapped distributions. For each distribution, expressions are given for the means, covariances ...

Bifurcation and Stability Analysis of a Food Web in a Chemostat

S.M. Sohel Rana — 2016-10-22

Journal of Mathematics and Statistics, Published online: 22 October 2016; doi:10.3844/jmssp.2016.213.224

In this study, a classical model describing a food web in a chemostat involving three species competing for non-reproducing, growth rate-limiting nutrient in which one of the competitors predates on o...

CFD-PBE Modelling and Simulation of Enzymatic Hydrolysis of Cellulose in a Stirred Tank

Norazaliza Mohd Jamil — 2016-10-25

Journal of Mathematics and Statistics, Published online: 25 October 2016; doi:10.3844/jmssp.2016.225.237

Renewable energy or biofuel from lignocellulosic biomass is an alternative way to replace the depleting fossil fuels. The production cost can be reduced by increasing the concentration of biomass part...

Multilevel Mixed Analysis and Mapping on Divorce Problem in UAE

Faisal G. Khamis — 2016-10-31

Journal of Mathematics and Statistics, Published online: 31 October 2016; doi:10.3844/jmssp.2016.238.247

Despite the wealth of research investigating the divorce problem in the developed countries, few and inconsistent studies investigated this problem at emirate-level in developing countries, such as Un...

Modelling the Error Term of Australia Gross Domestic Product

Ayodele Abraham Agboluaje — 2016-11-02

Journal of Mathematics and Statistics, Published online: 2 November 2016; doi:10.3844/jmssp.2016.248.254

The main aim of this study is to model the Gross Domestic Product (GDP) with the new Combine White Noise (CWN) Model and compare the results with the Vector Autoregressive (VAR) Model and Exponential ...

A New Bivariate Distribution with Generalized Quadratic Hazard Rate Marginals

Abdelfattah Mustafa — 2016-11-03

Journal of Mathematics and Statistics, Published online: 3 November 2016; doi:10.3844/jmssp.2016.255.270

Recently, Sarhan (2009) introduced a new distribution named generalized quadratic hazard rate distribution. In this study, we define a bivariate Generalized Quadratic Hazard Rate Distribution (BGQHRD)...

Continuity Function on Partial Metric Space

Fitri Aryani — 2016-11-13

Journal of Mathematics and Statistics, Published online: 13 November 2016; doi:10.3844/jmssp.2016.271.276

Ordered pairs form of a metric space (S,d), where d is the metric on a nonempty set S. Concept of partial metric space is a minimal generalization of a metric space where each x∈S,d(x,x) does not ne...

Flow and Heat Transfer Profiles in a Square Channel with 45° V-Downstream Orifices

Withada Jedsadaratanachai — 2016-11-18

Journal of Mathematics and Statistics, Published online: 18 November 2016; doi:10.3844/jmssp.2016.277.289

Flow and heat transfer profiles in a square channel heat exchanger inserted with 45° V-orifices are presented. The influences of Reynolds number (Re = 3000-10,000) and blockage ratio (BR = 0.05, ...

The Uniform Truncated Negative Binomial Distribution and its Properties

Bahady I. Kamel — 2016-11-29

Journal of Mathematics and Statistics, Published online: 29 November 2016; doi:10.3844/jmssp.2016.290.301

A new three parameters continuous distribution which is named the Uniform Truncated Negative Binomial (UTNB) distribution is introduced. It has the uniform and the Marshall-Olkin extended uniform dist...

Piecewise Positivity Preserving Cubic Bezier Interpolation for Estimating Solar Radiation Missing Value in Penang, Malaysia

Azizan Saaban — 2016-12-28

Journal of Mathematics and Statistics, Published online: 28 December 2016; doi:10.3844/jmssp.2016.302.307

Complete solar radiation data is important in variety of disciplines such as solar radiation development system or solar project which is strongly affected by hourly variation of the solar radiation. ...

On Containment and Radical Graphs of a Commutative Ring

Saba Al-Kaseasbeh — 2016-12-29

Journal of Mathematics and Statistics, Published online: 29 December 2016; doi:10.3844/jmssp.2016.308.311

In this study, we consider various graphs with the vertices being sets of ideals of a commutative ring with identity, R. How we define the edge set will vary according to distinct ideal theoretic prop...

Robust Linear Discriminant Analysis

Sharipah Soaad Syed Yahaya — 2017-01-04

Journal of Mathematics and Statistics, Published online: 4 January 2017; doi:10.3844/jmssp.2016.312.316

Linear Discriminant Analysis (LDA) is the most commonly employed method for classification. This method which creates a linear discriminant function yields optimal classification rule between two or m...