Abstract. Many kinds of morphisms on Petri nets have been defined and studied. They can be used as formal techniques supporting refinement/abstraction of models. In this paper we introduce a new notion of morphism on marked graphs, a class of Petri nets used for the representation of systems having deterministic behavior. Such morphisms can indeed be used to represent a form of abstraction on m...

A marked graph is obtained from a graph by giving each point either a positive or a negative sign. Beineke and Harary raised the problem of characterizing consistent marked graphs in which the product of the signs of the points is positive for every cycle. In this paper a characterization is given in terms of fundamental cycles of a cycle basis.

organizational culture of an organization is one of the fundamental staffs' job satisfaction factors. this study aimed to determine the effects of organizational culture on faculty members' job satisfaction using hofstede's model. in a descriptive applied study 61 faculty members of shahid beheshti university of medical sciences were randomly selected and studies in 2015. hofstede's model were ...

aim and background: the purpose of this study was to investigate the relationship between cognitive intelligence and ambiguity tolerance with entrepreneurship of west azarbayjan payam noor university students, iran. methods and materials: this cross-sectional correlational research was conducted during 2010-2011 academic years. 1122 student (672 female and 450 male) were selected using stratifi...

The objective of this paper is to show how ambiguity, and a decision maker (DM)’s response to it, can be modelled formally in the context of a general decision model. We introduce a relation derived from the DM’s preferences, called ‘‘unambiguous preference’’, and show that it can be represented by a set of probabilities. We provide such set with a simple differential characterization, and argu...