on one hand, iran due to the low annual rainfall and lack of appropriate spatial and temporal distribution in precipitation is considered as an arid and semi-arid country experiencing stress and water scarcity; on the other hand, 90% of annual water consumption has been allocated to agriculture sector in iran and efficiency and productivity of water consumption do not enjoy favorable status in ...

In order to achieve the virtual machines live migration, the two "pre-copy" and "post-copy" strategies are presented. Each of these strategies, depending on the operating conditions of the machine, may perform better than the other. In this article, a new algorithm is presented that automatically decides how the virtual machine live migration takes place. In this approach, the virtual machine m...

along with the advent of recent communicative technologies, new cyber social networks have been emerged as the most influential line of interaction. this is a new world free from many of constraints and limitations of the physical world. it lacks weather, gravity, and geographical features; therefore it does not require addressing many of structures and necessities of the real world. in the vir...

nowadays, new informational and communicative media, and the rate of their use by individuals have caused deep metamorphoses in the material and non-material dimensions of human lives, and individuals’ mental regulation. the use of these media, especially the internet and virtual social networks, among iranian teenagers has unnoticeably increased, and providing numerous facilities and options m...

for about a decade the virtual water trade has been highlighted as a means of promoting water efficiency and helping to solve regional restrictions of water resources in order to provide water and food security. although these tools are not just for certain areas of the world with a specific climate, they are more important for countries which are faced with water resources restriction and cris...