the fifth iranian national congress on the biology of addiction was held in 22-24 june 2011 in tehran university of medical sciences with over 100 valuable oral and poster presentations and over 300 participants. one of the main sessions of the congress was devoted to a national strategic planning and iranian drug control head quarter (dchq) introducing the first national executive road map on ...

Road and rail networks provide critical support for society, yet they can be degraded by seasonal soil movements. Currently, few transport network operators monitor small-scale soil movement, but understanding the conditions contributing to infrastructure failure can improve network resilience. Persistent Scatterers Interferometry (PSI) is a remote sensing technique offering the potential for n...

mountainous rangeland ecosystems have a highly delicate position in ecologic areabecause of severe environmental conditions and having wildlife and livestock. knowing andrealizing the biotic and abiotic components, which have an interaction with each other in thisecosystem, perform the most important role in to desirable management of it. the systematicmanagement is one of the managing features...

Tissot indicatrices have provided visual measures of local area and isotropy distortions. Here we show how large scale distortions of flexion (bending) and skewness (lopsidedness) can be measured. Area and isotropy distortions depend on the map projection metric, flexion and skewness, which manifest themselves on continental scales, depend on the first derivatives of the metric. We introduce ne...

We construct a map injecting the set of infrastructure ideals in a real function field into the class group of the correspoding hyperelliptic curve. This map respects the ‘group-like’ structure of the infrastructure, as a consequence of this construction we show that calculating distances in the set of infrastructure ideals is equivalent to the DLP in the underlying hyperelliptic curve. We also...

The shared medium of 802.11 wireless networks means that they are susceptible to many MAC-layer attacks, such as frame spoofing, denial of service, and greedy misbehavior. To detect such attacks it is necessary to monitor the wireless channel itself and examine the timing and content of the 802.11 frames. Wireless “sniffing” is challenging: sniffers may not hear every frame, nearby sniffers may...