List of Articles directivity Open Access Article Abstract Page Full-Text 1 - Improving Microstrip Antenna Characteristics with Coaxial Feed Line Using Metamaterial Superstrate Reza Khajeh Mohammad Lou Mahdi Jalali Open Access Article Abstract Page Full-Text 2 - Investigation of forward directivity effects on design spectra of industrial complexes near Assaluyeh fault Ali Raoof Mehrpoor Masoud N. Ahari Open Access Article Abstract Page Full-Text 3 - Dynamic Response of Bridges to Near and Far Fault, Forward Directivity Ground Motions mohammad hajali abdolrahim jalali ahmad maleki Open Access Article Abstract Page Full-Text 4 - Comparison among seismic design codes on near field effect Mohammad Reza Tabeshpour Esmaeil Khosrojerdi