Volume 7, Issue 3 (2011) | Journal of Mathematics and Statistics

A New Cryptosystem Based on Factoring and Discrete Logarithm Problems

E.S. Ismail — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.165.168

Problem statement: A cryptosystem allows a sender to send any confidential or private message using a receiver’s public key and later the receiver confirms the integrity of the received message usin...

Reliability Equivalence Factors of a System with 2 Non-identical Mixed Lifetimes and Delayed Time

Abdelfattah Mustafa — 2011-07-29

Journal of Mathematics and Statistics, Published online: 29 July 2011; doi:10.3844/jmssp.2011.169.176

Problem statement: In reliability theory and operations research, there are many methods and techniques to improve the performance of a system. The aim of this study is to generalize reliability equiv...

A Hybrid Approach based on Winter's Model and Weighted Fuzzy Time Series for Forecasting Trend and Seasonal Data

Suhartono — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.177.183

Problem statement: In the literature, the most studied of fuzzy time series for the purpose of forecasting is the first order fuzzy time series model. In this model, only the first lagged variable is ...

Distribution of Records Defined on Ordered Words Representing Lattice Paths

A. M. Alahmadi — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.184.186

Problem statement: Let the sequence i1,i2,…,in, denoted by Snn be an increasing ordered word of length n taken from the set of the n positive integers S= {1,2,…,n}, m, n ∈N+, m≥n.. Approach: T...

Establishing an Adaptive Production-Procurement System with Markov Chain Approach Associated with 3C Theory

Chun-Ta Lin — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.187.197

Problem statement: In this study, we classify the imperfect situations that the unreliability of production and the defective products might be incurred from production process into eight independentl...

Microwave Assisted Bioethanol Production from Sago Starch by Co-Culturing of Ragi Tapai and Saccharomyces Cerevisiae

N. Saifuddin — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.198.206

Problem statement: Environmental issues such as global warming and recent events throughout the world, including the shortage of petroleum crude oil, the sharp increase in the cost of oil and the poli...

Flows of Continuous-Time Dynamical Systems with No Periodic Orbit as an Equivalence Class under Topological Conjugacy Relation

Tahir Ahmad — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.207.215

Problem statement: Flows of continuous-time dynamical systems with the same number of equilibrium points and trajectories, and which has no periodic orbit form an equivalence class under the topologic...

Optimizing Empty Containers Distribution among Ports

Mohammed A. Hajeeh — 2011-07-18

Journal of Mathematics and Statistics, Published online: 18 July 2011; doi:10.3844/jmssp.2011.216.221

Problem statement: Empty containers are an essential part of the logistics of the movement, repositioning and distribution of containers. Optimizing the allocation and transportation of empty containe...

Effect of Activation Energies on Thermal Explosion in the Interior of the Earth

Amos Oladele Popoola — 2011-07-27

Journal of Mathematics and Statistics, Published online: 27 July 2011; doi:10.3844/jmssp.2011.222.226

Problem statement: Literatures have shown that thermal processes in the interior of the earth and the classical thermal explosion are analogous and that combustion processes are characterized by ign...

Inversion of Covariance Matrix for High Dimension Data

Samruam Chongcharoen — 2011-07-27

Journal of Mathematics and Statistics, Published online: 27 July 2011; doi:10.3844/jmssp.2011.227.229

Problem statement: In the testing statistic problem for the mean vector of independent and identically distributed multivariate normal random vectors with unknown covariance matrix when the data has...

An Approximate Formula of European Option for Fractional Stochastic Volatility Jump-Diffusion Model

P. Sattayatham — 2011-07-27

Journal of Mathematics and Statistics, Published online: 27 July 2011; doi:10.3844/jmssp.2011.230.238

Problem statement: We presented option pricing when the stock prices follows a jumpdiffusion model and their stochastic volatility follows a fractional stochastic volatility model. This proposed mod...

Application of Theories of Complexity and Chaos to Economic Misgovernance

Partha Gangopadhyay — 2011-07-27

Journal of Mathematics and Statistics, Published online: 27 July 2011; doi:10.3844/jmssp.2011.239.248

Problem statement: In this study we develop a comprehensive model involving local taxes, intergovernmental transfers and bureaucratic corruption to characterize a fiscal equilibrium in order to expl...

A New Perturbative Approach in Nonlinear Singularity Analysis

Tat-Leung Yee — 2011-07-29

Journal of Mathematics and Statistics, Published online: 29 July 2011; doi:10.3844/jmssp.2011.249.254

Problem statement: The study is devoted to the “mirror” method which enables one to study the integrability of nonlinear differential equations. Approach: A perturbative extension of the mirror me...