Nowadays, more and more users keep up with news through information streams coming
from real-time micro-blogging activity offered by services such as Twitter. In these sites,
information is shared via a followers/followees social network structure in which a follower
receives all the micro-blogs from his/her followees. Recent research efforts on
understanding micro-blogging as a novel form of communication and news spreading
medium have identified three different categories of users in these systems: information …