In the summer of 2003, the Littoral Acoustic Demonstration Center conducted an acoustic characterization experiment for a 21-element marine seismic exploration airgun array of total volume of 0.0588 m(3) (3590 in.(3)). Two Environmental Acoustic Recording System buoys, one with a desensitized hydrophone, were deployed at a depth of 758 m in a water depth of 990 m, near Green's Canyon in the Gul...

Satellite communications is the most prominent solution for covering remote areas for broadband Internet access where long and expensive cables are not feasible to be deployed. The Australia’s National Broadband Network (NBN) initiation ’delivering superfast broadband to Australian homes and workplaces’ currently face the problem of deploying long fibres to cover regional blackspots considering...

Abstract This contribution describes the development of Norwegian Seismic Array (NORSAR), from its origin 50 yr ago as a project for installing single seismic array in southern Norway to seismological research institute operating network six arrays and 14 three-component stations located Antarctica. In addition, we document different instrumentations narrowband, mostly short-period sensors toda...

it is well established that the seismic ground response of surface topographies may differ from those of free field motion during earthquakes. complex nature of seismic wave scattering by topographical structures can only be solved accurately and economically using advanced numerical methods under realistic conditions. among the numerical methods, the boundary element is a powerful numerical te...

* Corresponding Author: Hamed Ekhtiari, MD Neurocognitive Laboratory, Iranian National Center for Addiction Studies, Tehran University of Medical Sciences. Tel/Fax: 0098-21-55421177 E-mail: [email protected] Seyyed-Ehsan Parhizgar , Hamed Ekhtiari 1*

summarythe explanation of the elastic, or velocity structure of the earth has long been a goal of the world’s seismologists. for the first few decades of seismological research, the investigation on velocity structure was restricted to the determination of one-dimensional models of the solid earth and of various regions within it. seismologists are currently obtaining three dimensional velocity...

rural sustainable development is one the most important components of achievement to sustainable development in a national scale which is not doable without using an efficient management. therefore, recognizing the problems ahead of local management in the scale of various geographical regions of the country and attempting to solve them by using proper course of actions could be instrumental. i...