There is a lack of educational technology to support cognitive systems engineering topics such as models of human performance in dynamic environments. This paper describes the Cognitive Systems Engineering Educational Software (CSEES) system, an integrated toolset designed to facilitate curricula related to human judgment and decision-making performance modeling and evaluation. CSEES provides s...

The mathematical modeling of a gas network is a powerful tool in order to identify the behavior of system under the different conditions. The modeling can be performed both for the steady state and unsteady state conditions. It is possible to use the fluid flow basic governing equations or the electrical analogy concept for developing the model. The second approach provides a simpler and more r...

The paper is concerned with the bifurcation of limit cycles in general quadratic perturbations of a quadratic reversible and non-Hamiltonian system, whose period annulus is bounded by an elliptic separatrix related to a singularity at infinity in the poincar'{e} disk. Attention goes to the number of limit cycles produced by the period annulus under perturbations. By using the appropriate Picard...

the implementation of inter-organizational systems like business- to- business e-commerce (b2b e-commerce)  is being categorized as a system with high degree of difficulty since it involves complexity of the multiple relationships and interactions between trading partners. companies need to consider their own strengths and weaknesses before making decisions to explore new b2b e-commerce without...

In this study, it is attempted to survey some intervening factors leading L2 Iranian learners’ not to be successful as well, and then seeks some of the features that might be applicable to open new windows into L2 learners in Iran. Also it concerns some aspects of language learning, which have received poor attention from both pedagogical and non-pedagogical areas. This article examined some so...