In the present investigation transient, G x/G/m queuing model with balking and reneging has been studied. The diffusion process with elementary return boundary has been used for modeling purpose. The probability density function (p. d. f.) for the number of customers in the system has been obtained. In special case, the steady state results that tally with those of Kimura and Ohsone have been e...

Regularity of non-stationary and stationary solutions to the diffusion approximation of the GI/G/1 queueing system under the elementary return boundary condition are discussed in this paper. Some boundedness of the solutions are also verified by using maximum principle. Introduction We discuss explicit non-stationary and stationary solutions to an initial boundary value problem of a linear part...

IT is intuitively obvious that if a simple continuous curve is given in the (x, 2/)-plane, and a continuous distribution of values along the curve, there will exist functions of x and y which are continuous in both variables together, and which take on the prescribed values along the curve. It is the purpose of the present note to give an analytic proof of this fact, by elementary means, and, i...

In this empirical study, we investigate the effects of IT investments on firm risk-return profile, emphasizing the complementarities between IT investments and firm boundary strategies; i.e., diversification and vertical integration. Our results are consistent with a strong moderating role of IT in leveraging firm boundary strategies on both the return and risk dimensions of firm financial perf...

We present the findings of analysis of elementary cellular automata (ECA) boundary conditions. Fixed and variable boundaries are attempted. The outputs of linear feedback shift registers (LFSRs) act as continuous inputs to the two boundaries of a one-dimensional (1-D) Elementary Cellular Automata (ECA) are analyzed and compared. The results show superior randomness features and the output strin...

This article offers a new taxonomy of how actors may change ethnic boundaries. I distinguish between five main strategies: to redraw a boundary by either expanding or limiting the domain of people included in one’s own ethnic category; to modify existing boundaries by challenging the hierarchical ordering of ethnic categories, or by changing one’s own position within a boundary system, or by em...

OBJECTIVE To maximize active parent consent form return rates for third-grade minority, urban students enrolled in predominantly low-income elementary schools in Chicago, Ill. METHODS Research staff used a class incentive and class visits to retrieve consent forms from students. RESULTS Of the 811 third-grade students, 98% returned a form and 79% (n = 627) of those students' parents provide...

OBJECTIVE High resolution visual prostheses require dense stimulating arrays with localized inputs of individual electrodes. We study the electric field produced by multielectrode arrays in electrolyte to determine an optimal configuration of return electrodes and activation sequence. APPROACH To determine the boundary conditions for computation of the electric field in electrolyte, we assess...