The evolution of internet created new opportunities for small and medium enterprises (SME), among which are social networks. This work aims at analyzing the potential of these networks for the SME in Algarve, creating a questionnaire for the purpose. The empirical study revealed that some firms have already an integrated business strategy with social networks, as well as a group in the firm res...

The paper considers studying the perception and assessment of media content in the Russian-language social networks, analyzing the causes that affect the perception and distribution of network content. The importance of language learning and communication in Russian-language social networks, and problems of content effectiveness is determined by the growth in the number and activity of Runet us...

We study the evolution of opinions (or beliefs) over a social network modeled as a signed graph. The sign attached to an edge in this graph characterizes whether the corresponding individuals or end nodes are friends (positive link) or enemies (negative link). Pairs of nodes are randomly selected to interact over time, and when two nodes interact, each of them updates her opinion based on the o...