%0 Journal Article %T Influence, originality and similarity in directed acyclic graphs %A Stanislao Gualdi %A Matus Medo %A Yi-Cheng Zhang %J Computer Science %D 2011 %I arXiv %R 10.1209/0295-5075/96/18004 %X We introduce a framework for network analysis based on random walks on directed acyclic graphs where the probability of passing through a given node is the key ingredient. We illustrate its use in evaluating the mutual influence of nodes and discovering seminal papers in a citation network. We further introduce a new similarity metric and test it in a simple personalized recommendation process. This metric's performance is comparable to that of classical similarity metrics, thus further supporting the validity of our framework. %U http://arxiv.org/abs/1108.3691v1