this article reviews the ancient symbolic world, shia and modernity believes in iranian’s mind which are historical link between ancient symbolic world and shie. since the late nineteenth century with the modernization, for exampel civilization, constitutional movement and palavi government, gap created in iranians mind. dispite this gap, iranians mind have symbolic characteristics and are not ...

We discuss optimal detection of fast radio transients from astrophysical objects while taking into account the effects of propagation through intervening ionized media, including dispersion, scattering and scintillation. Our analysis applies to the giant-pulse phenomenon exhibited by some pulsars, for which we show examples, and to radio pulses from other astrophysical sources, such as prompt r...

The vast range of the electromagnetic spectrum and the wide range of potential signaling methods make comprehensive searches for extraterrestrial signals difficult. Perhaps because of this, in nearly five decades of SETI searches no indications of extraterrestrial civilization have been seen. Expanding technologies and new instruments can help close the gaps in the SETI search space. New techni...

Our understandings of civilizations on Earth inevitably influence speculation about extraterrestrial civilizations. Specifically, our assumptions about the development of Earth’s societies continually shape our conjectures about alien societies, on topics including the probability of their existence, their possible characteristics, appropriate search strategies, and the wisdom of seeking contac...

E. O. Wilson’s recent plea for employing consilience to achieve knowledge unification focuses on linking the biological and social sciences/humanities, yet admits to only minimal progress. If and when SETI succeeds in making contact with extraterrestrial civilizations, a comparative study of these could provide a means for overcoming current barriers to linking the natural and cultural realms, ...