As a member of the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS), Iran has a long-term space exploration program. Space radiation is one of the challenges facing humans when they go outside Earth's protective atmosphere and magnetic field. Space is an environment that the cardinal principles of radiation protection i.e. time, distance and shielding cannot be effectively ...

Acute traumatic brain injury is a worldwide public health crisis. Post-traumatic subarachnoid hemorrhage (SAH) is a finding that is present at a frequency of 40% according to data from American TCDB (1,2). Among the mechanisms that have been implicated as causes of post-traumatic SAH is the cortical bleeding through the subarachnoid space. It is estimated that the incidence of post-traumatic SA...

land use changes are one of the important consequences of urban spatial extent. regarding the role of green space as one of important land use classes in urban ecosystems, the investigations of its changes seem to be crucial. in this study, to estimate the changes of green space, the ndvi index was applied to tm and irs images of 1990 and 2006 and green space maps of district 1 of tehran munici...