The present research was conducted to build a conceptual model of internal effective factors of small and medium enterprises in Mazandaran Province. To accomplish the goal of the research first, a complete review of the related literature was conducted. Second, questionnaires were given to the corresponding population. Finally, the gathered data were calculated and analyzed using SPSS, Exce...

an internal ballistics model has been developed for performance prediction of a solid propellant rocket motor. inthis model a 1-d unsteady euler equation with source terms is considered. the flow is assumed as a non-reacting mixture of perfect gases with space and time varying thermo physical properties. the governing equations in the combustion chamber are solved numerically by using the stege...

A Performance Model Interchange Format (PMIF) provides a mechanism whereby system model information may be transferred among performance modeling tools. The PMIF allows diverse tools to exchange information and requires only that the importing and exporting tools either support the PMIF or provide an interface that reads/writes model specifications from/to a file. This paper presents the develo...

the locus of control is a construct reflecting beliefs about the control of behavior and life events. according to this perception, people are grouped into two main categories: an internal and external locus of control. the main purpose of this study was to investigate the relationship between wheat yield performance, locus of control and wheat growers’ (wg) characteristics. survey research met...

The present research was conducted to build a conceptual model of internal effective factors of small and medium enterprises in Mazandaran Province. To accomplish the goal of the research first, a complete review of the related literature was conducted. Second, questionnaires were given to the corresponding population. Finally, the gathered data were calculated and analyzed using SPSS, Exce...