abstract recognition of effective factors on landslide occurrence and so high and low hazard region is one of the most important and necessary works for mitigation of landslide damages. in this study, from all of the effective factors on landslide occurrence, land use changes and road construction, into a parts of tadjan watershed with area about 708.08 square kilometers in south of sari, was s...

A road map can be interpreted as a graph embedded in the plane, in which each vertex corresponds to a road junction and each edge to a particular road segment. We consider the cartographic problem to place non-overlapping road labels along the edges so that as many road segments as possible are covered by labels. We show that this is NP -hard in general, but can be solved in polynomial time if ...

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 ...