the aim of this study was to analyze the components of social capital among agricultural students with emphasis on entrepreneurship. this survey was descriptive and correlational study. statistical population consisted of agricultural students in tarbiat modares university (n=468) which 181 student was selected as samples by bartlett table. samples were studied via using simple random sampling ...

Motivated by applications to social network analysis (SNA), we study the problem of finding the maximum number of disjoint unicolor paths in an edge-colored graph. We show the NP-hardness and the approximability of the problem, and both approximation and exact algorithms are proposed. Since short paths are much more significant in SNA, we also study the length-bounded version of the problem, in...

A model for network panel data is discussed, based on the assumption that the observed data are discrete observations of a continuous-time Markov process on the space of all directed graphs on a given node set, in which changes in tie variables are independent conditional on the current graph. The model for tie changes is parametric and designed for applications to social network analysis, wher...

men and women are manufacturers the main families and healthy family the most suitable background perfection and excellence of both the individual and society. in this study, the factors affecting sexual attitudes towards family bonds among faculty and staff in payame noor university, hamedan province was. research has sociological approach and survey method. data, inventory and multi-stage ran...

We consider the computational complexity of the Market equilibrium problem by exploring the structural properties of the Leontief exchange economy. We prove that, for economies guaranteed to have a market equilibrium, finding one with maximum social welfare or maximum individual welfare is NP-hard. In addition, we prove that counting the number of equilibrium prices is #P-hard.