> Maxime Vanmeerbeck This visualisation is based on the dataset compiled by a team of researchers during the discovery of the Higgs boson on Twitter. The dataset describes the activity about the discovery on the social network of the users (reply, mention, retweet) over a period of several days. In order to study the propagation […]
> Marwan Ghanem, Clémence Magnien and Fabien Tarissan One of the main indicators of graph analyses is the centrality, which quantifies the importance of a node in the network. We are interested particularly in the closeness centrality, which relies on the shortest distance between the considered node and all other nodes in the network. As […]
> Lamia Benamara et Clémence magnien When trying to characterize the dynamics of a system, we are faced with two problems. First, the observation window must be long enough to be representative. Second, the fact that it is finite still induces a bias in the observations, sessions beginning/ending before/after the measurement window are not seen […]
> By Oussama Allali, Matthieu Latapy and Clémence Magnien Link prediction is a key research problem within the analysis of network dynamics. It aims at predicting the links which will appear in future evolution of the network. We consider here a set of peers and files, where each peer is linked to the files it […]
> By Raphaël Fournier and Matthieu Latapy P2P systems are known to host a large amount of paedophile activity. Thus, quantifying the number of paedophile users on a P2P system is crucial, for many reasons: easy access to such content is a major societal concern, policy making and law-enforcement budgeting rely on this figure and […]
> Bénédicte Le Grand This plot represents the evolution of the popularity of the keywords ‘avi’, ‘madonna’ and ‘jackson’ in eDonkey queries (captured on an eDonkey server during 102 days in 2009). The values on the y-axis represent the proportion of occurrences of these keywords in eDonkey queries for each day of the capture (x-axis). […]
> By Elie Rotenberg, Christophe Crespelle and Matthieu Latapy Here, we aim at measuring the IP-level neighborhood of internet core routers in a rigorous way. We proceed as follows. First, we send traceroute probes from many monitors distributed in the internet towards a given target router. Then we consider the last but one IP adress […]
> By Guillaume Valadon and Korlam Gautam Twitter is a micro-blogging platform that allows its users to post short messages (aka Tweets) to be displayed on their profile pages. A social network is also embedded in Twitter: users can receive messages from users they follow. In the Twitter terminology, there are following and followers. Given […]
> By Christophe Berger, Clémence Magnien, Matthieu Latapy, Firas Bessadok and Phillipe Jarlov We conduct a measurement of files available in eDonkey as follows. Our client connects to all eDonkey servers it discovers (it knows an initial lists of servers and explores the set of all servers reachable from these). Then it sends every 12 […]
> By Bénédicte Le Grand These figures represent Galois lattices built from two samples of online social networks (Myspace and DailyMotion). Galois lattices, from Formal Concept Analysis, cluster data (here the members of a social network sample) according to their common properties (here the members’ contacts). Each node of the lattice is called a concept; […]
