Recently added articles from Journal of Mathematics and Statistics:
Power series solution for a two-step reactive-diffusive equation with variable pre-exponential factor.(Report)
Apr 01, 2008; ... Abstract: We discussed in this research a power series method for solution of a two-step reactive-diffusive equation with variable pre-exponential factor. A transformation was used to fit in the geometry of the model to allow an asymptotic series expansion which is invoked in a two ...
Weyl's type theorems for quasi-class A operators.(Report)
Apr 01, 2008; ... Abstract: A variant of Weyl theorem for a class of quasi-class A acting on an infinite complex Hilbert space were discussed. If the adjoint of T is a quasi-class A operator, then the generalized a-Weyl holds for f(T), for every function that analytic on the spectrum of T. The generalized ...
Effect of multicollinearity on power rates of the Ordinary Least Squares estimators.(Report)
Apr 01, 2008; ... Abstract: Inferences on the parameter estimates of Ordinary Least Square (OLS) estimator in regression model when regressors exhibit multicollinearity is a problem in that large standard errors of the regression coefficients which cause low t-statistic value often result into the ...
Boundary effect on Marangoni convection in a variable viscosity fluid layer.(Report)
Jan 01, 2008; ... Abstract: 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 conductivity. The viscosity group, [R.sub.v], Biot number, Bi, depth ratio, ...
Rounding theorem the possibility of applying the cryptosystems on the decimal numbers.(Report)
Jan 01, 2008; ... Abstract: 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 integer numbers to avoid the fractions of the decimal numbers. That is to avoid ...
Transient solution of the M/M/[C.sub.1] queue with additional [C.sub.2] servers for longer queues and balking.(Report)
Jan 01, 2008; ... Abstract: The goal of this research is to discuss the M/M/[C.sub.1] queue with additional [C.sub.2] servers for longer queues and balking. By using generating function technique the transient probabilities are derived in terms of the modified Bessel function. Keywords: ...
Construction of control charts using fuzzy multinomial quality.(Report)
Jan 01, 2008; ... Abstract: 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 "nonconforming" or "conforming" to the specification with respect to the quality ...
On Sandwich theorems of analytic functions involving Noor integral operator.(Report)
Jan 01, 2008; ... Abstract: In this research, we introduce sufficient conditions for subordination and superordination for subclass of analytic functions containing Noor integral operator. Key words: Noor integral operator, subordination, superordination INTRODUCTION Let H ...
Integral dissipative set-valued maps.(Report)
Jan 01, 2008; ... Abstract: 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 endowed with Hausdorff topology having this dissipativity condition is a complete ...
Numerical study of tsunami waves with sloping bottom and nonlinear friction.(Report)
Jan 01, 2008; ... Abstract: 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 developed to simulate the wave propagation. The method uses an up-wind difference ...
An operator defined by convolution involving the polylogarithms functions.(Report)
Jan 01, 2008; ... Abstract: We define an operator on the class A of analytic functions in the unit disk U = {z : [absolute value of z] < 1} involving the polylogarithms functions and introduce certain new subclasses of Ausing this operator. Some inclusion results, covering theorem, coefficients ...
Framework of regression-based graph matrix analysis approach in multi-relational social network problem.(Report)
Jan 01, 2008; ... Abstract: 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 assume that there is only one kind of relation in the network and moreover, the ...
A new approach for solving second order ordinary differential equations.(Report)
Jan 01, 2008; ... Abstract: A new approach is presented to solve second order linear differential equations with variable coefficients and some illustrative examples are given. Key words: Second order equations, general solution, homogeneous and nonhomogeneous equations INTRODUCTION ...
A numerical algorithm for solving a one-dimensional inverse heat conduction problem.(Report)
Jan 01, 2008; ... Abstract: This research is intended to provide a numerical algorithm for solving a one-dimensional inverse heat conduction problem. The given heat conduction equation, the boundary conditions and the initial condition are presented in a dimensionless form. A numerical approach combining ...
Percentile double ranked set sampling.(Report)
Jan 01, 2008; ... Abstract: 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 sampling (RSS), median ranked set sampling (MRSS) and the extreme ranked set ...
Maximum principles for second order elliptic equations in nondivergence form and applications.(Report)
Jan 01, 2008; ... Abstract: 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 establish the maximum principles in small domains. The advantage of this work was that ...
Mathematical sophistication and differentiated emotions during Mathematical problem solving.(Report)
Oct 01, 2007; ... Abstract: George Polya, author of Mathematical Discovery and the enduring best seller How to Solve It: A New Aspect of Mathematical Method, claims that more sophisticated people experience more differentiated emotion during mathematical problem solving, a claim that has been untested for ...
The Extended Laplace Transform.(Report)
Oct 01, 2007; ... Abstract: The space of new generalized functions has been constructed. The operation of associative multiplication has been defined on this space. The Extended Laplace Transform has been defined. Key words: New generalized functions, extended Laplace Transform, associative ...
Numerical treatment of the mathematical models for water pollution.(Report)
Oct 01, 2007; ... Abstract: To evaluate the environmental impact of pollution, mathematical models play a major role in predicting the pollution level in the regions under consideration. This paper examines the various mathematical models involving water pollutant. We also give the implicit central ...
Nonparametric analysis on system availability: confidence bound and power function.(Report)
Oct 01, 2007; ... Abstract: In this study we consider the steady-state availability, denoted A, of a system with distribution-free failure and repair time. In particular, we are interested in constructing a lower confidence bound and a testing framework for A. We first show that the natural estimator [??] ...