every year, a considerable portion of the national budget specifies to reconstruct the properties which have been destroyed during natural disasters in iran. recognition of vulnerable sites to natural disasters can reduce the probable damages. the most important point in designing railway tracks is to join stations in the least possible time. so, the railway track is meant to cross lots of vall...

An attempt was made to identify the productivity level of different zones of Nanak Sagar reservoir through the application of Geographical Information System (GIS). Based on biological, hydrological and soil parameters, thematic layers were created by interpolating point wise annual average value of given parameters and three models were developed using the weighted overlay method in ArcGIS v.1...

Vulnerability maps are useful for groundwater protection, water resources development, and land use management. The literature contains various approaches intrinsic vulnerability assessment, they mainly depend on hydrogeological settings anthropogenic impacts. Most methods assign certain ratings weights to each contributing factor vulnerability. Fuzzy logic (FL) is an alternative artificial int...

The dominant eigenvector of matrices defined by weighted links in overlay networks plays an important role in many peer-to-peer applications. Examples include trust management, importance ranking to support search, and virtual coordinate systems to facilitate managing network proximity. Robust and efficient asynchronous distributed algorithms are known only for the case when the dominant eigenv...

In this paper, we study the problem of how to design overlay topologies in multi-hop wireless networks such that the overlays achieve perfect resilience, in terms of all cooperative nodes included but misbehaving nodes excluded, and preserve the k-connectivity with high probability. To address this problem, we propose a new distributed topology control protocol called PROACtive. By using PROACt...

Population distribution has been long studied. There are no clear answers as to what the major influential factors that drive population density are. Using ArcGIS 9.1, this study focuses on global population distribution and it’s relationship to selected biological and environmental factors. Using geoprocessing techniques such as reclassify, weighted overlay and modelbuilder, models where creat...

Bloom filters are used for resource routing and distance-weighted Bloom filters (dwBFs) are used as a concise representation of routing information for scattered resources in overlay networks. Today's DHT-based P2P lookups are always influenced by unnecessarily long routers in the underlay network. The reason is that the false positives appearing in DHT lookup can lead to incorrect direction. T...

This study aims to delineate groundwater potential zones in Tana Righu. Multiple thematic maps were prepared using RS and GIS techniques was assigned suitable weights on the Saaty’s scale. The of then normalized AHP technique. Ultimately, these integrated with a weighted overlay technique GIS. results showed that about 42% area has “moderate” potential; 35.86% “high” 28,82% ”low” potential. 3.5...