The proper orientation number χ→(G) of a graph G is the minimum k such that there exists an edges with all vertex-outdegrees at most and for any adjacent vertices, outdegrees are different. Two major conjectures about resolved. First it shown, planar 14. Secondly, shown every graph, , where r=χ(G) usual chromatic maximum average degree taken over subgraphs G. Several other related results deriv...

     Reduction of water resources limits the ability of farmers for food production and subsistence. Nowadays the quick growth of population has been the most important factor in the decline of renewable water. In many parts of Iran, including region of interest, the major factor in water resources decline was land use change, that may  cause to ecological destruction and disruption. Sustainabl...

this study aimed to assess the factors affecting electronic banking acceptance among customers using the technology acceptance model has been made. methods used, descriptive survey - correlation. the studies of those customers are people who have bank accounts and bank electronic banking services people have used. research model with a sample consisting of 384 bank customers were people in tehr...