iran due to its unique condition in terms of tourist attraction and because of the specific location and a variety of natural resources and human phenomena, that different regions of the country including guilan province has a typical position in terms of tourism which attracts a lot of tourists. by itself, ecological, environmental, cultural, historical and religious attraction in the north, w...

In this paper we formalize sanction-based obligations in the context of Searle’s notion of construction of social reality. In particular, we define obligations using a counts as conditional, Anderson’s reduction to alethic modal logic and Boella and Lesmo’s normative agent. Our analysis presents an alternative criticism to the weakening rule, which has already been criticized in the philosophic...

The main aim of access control models is to provide means to simplify the management of the security policy, which is a fastidious and error-prone task. Supporting delegation is considered as an important mean to decentralize the administration and therefore to allow security policy to be more flexible and easier to manipulate. Our main contribution is the proposition of a unified model to the ...

Combining two new datasets on sanctions and agricultural trade implementing step-by-step the latest developments in empirical structural gravity literature, we investigate effects of international products. We find that have been effective impeding trade, while other do not show any significant effects. The complete our sample led to about a 73% decrease between sanctioned sanctioning countries...