the united states and russia are two important actors in international system. the geography of their national interests is global and extra-regional; therefore, the quality of their relationship affects the security of international system. it can create security or can cause insecurity in international system. after the disintegration of soviet :union: there has been more interaction between ...

In recent decades, necessity to protect environment has been a serious concern for all people and international communities. In appropriate development of human economic activities, subsistence dependence of the growing world population on nature decreases the natural diversity of ecosystems and habitats day by day and provides additional constraints for life and survival of wildlife. As a resu...

the international data have indicated a growing trend of alcohol use worldwide during recent years. although alcohol use is against cultural norms and religious law in iran, anecdotal reports from substance abuse treatment providers show that there is demand for alcohol treatment in the country. a recent national report also documented alcohol use disorders in iran. development and implementati...

mobile robot navigation is one of the basic problems in robotics. in this paper, a new approachis proposed for autonomous mobile robot navigation in an unknown environment. the proposedapproach is based on learning virtual parallel paths that propel the mobile robot toward the trackusing a multi-layer, feed-forward neural network. for training, a human operator navigates themobile robot in some...

Background: Success of infection treatment depends on the availability of accurate, reliable, and comprehensive data, information, and knowledge at the point of therapeutic decision-making. The identification of a national minimum data set will support the development and implementation of an effective surveillance system. The goal of this study was to develop a national antimicrobial resistanc...

triple helix model (th) collaborations involving university, industry and government provide a networked infrastructure for shaping the dynamic fluxes of knowledge base of innovations locally and these fluxes remain emergent within the domains. in this article first the knowledge-based economy, national system of innovation, and three models of uig relations which represent different triple hel...