crisis management, as one of the key activities in strategic management has significant importance. one of the major requirements of crisis management is the high level of readiness and qualification of human resources responsible for crisis management. the focus of this paper is on presenting a crisis management model with human resources approach. first, we reviewed the literature and extract...

The need for oil and natural gas as a major source of energy is vital. On the one hand, it has affected the political and economic equations at the international, regional and national level. On the other hand, it has had negative effects on sociocultural, legal, and environmental aspects as well as on the physical and mental health of human beings. Therefore, the need to provide an environment...

the virtual space of internet social networks is one of the most important devices to exert the influence of globalization. this virtual space creates a vast quantity of information and meaning representations. faced with this space and the profusion of sources, people experience suspension (i.e. confusion and indecision) in shaping their identity. the loss of the concepts of time and place and...

The need for oil and natural gas as a major source of energy is vital. On the one hand, it has affected the political and economic equations at the international, regional and national level. On the other hand, it has had negative effects on sociocultural, legal, and environmental aspects as well as on the physical and mental health of human beings. Therefore, the need to provide an environment...

In the late 1970s the convective system that is referred to as the bow echo was identified by Fujita (1978). It was identified as a type of convective storm structure associated with intense damaging winds or downburst (Johns 1993). As more of these systems were studied, a better understanding was made on their kinematic structure and dynamical processes. Bow echoes can range in size from 15 km...

Ducted gravity waves are associated with potentially large perturbations in horizontal winds. It may be shown, neglecting friction, that these perturbations are maximized at the surface and minimized at the top of the wave duct, producing perturbation vertical wind shear as well. The magnitude of this shear is maximized in the wave ridge and the wave trough. The perturbation shear may be signif...