111 citations · 248 across the 16 of their papers we have counts for
10 papers · 1 filter
Characterizing Nodes and Edges in Dynamic Attributed Networks: A Social-based Approach
Thiago H. P. Silva, Alberto H. F. Laender, Pedro O. S. Vaz de Melo
How to characterize nodes and edges in dynamic attributed networks based on social aspects? We address this problem by exploring the strength of the ties between actors and their a…
Facebook Ads Monitor: An Independent Auditing System for Political Ads on Facebook
Márcio Silva, Lucas Santos de Oliveira, Athanasios Andreou +3
The 2016 United States presidential election was marked by the abuse of targeted advertising on Facebook. Concerned with the risk of the same kind of abuse to happen in the 2018 Br…
A Multi-Strategy Approach to Overcoming Bias in Community Detection Evaluation
Jeancarlo Campos Leão, Alberto H. F. Laender, Pedro O. S. Vaz de Melo
Community detection is key to understand the structure of complex networks. However, the lack of appropriate evaluation strategies for this specific task may produce biased and inc…
Improving Community Detection by Mining Social Interactions
Jeancarlo Campos Leão, Michele Amaral Brandão, Pedro O. S. Vaz de Melo +1
Social relationships can be divided into different classes based on the regularity with which they occur and the similarity among them. Thus, rare and somewhat similar relationship…
Fast Estimation of Causal Interactions using Wold Processes
Flavio Figueiredo, Guilherme Borges, Pedro O. S. Vaz de Melo +1
We here focus on the task of learning Granger causality matrices for multivariate point processes. In order to accomplish this task, our work is the first to explore the use of Wol…
When Politicians Talk About Politics: Identifying Political Tweets of Brazilian Congressmen
Lucas S. Oliveira, Pedro O. S. Vaz de Melo, Marcelo S. Amaral +1
Since June 2013, when Brazil faced the largest and most significant mass protests in a generation, a political crisis is in course. In midst of this crisis, Brazilian politicians u…
Group Mobility: Detection, Tracking and Characterization
Ivan Oliveira Nunes, Pedro O. S. Vaz de Melo, Antonio A. F. Loureiro
In the era of mobile computing, understanding human mobility patterns is crucial in order to better design protocols and applications. Many studies focus on different aspects of hu…
How Many Political Parties Should Brazil Have? A Data-driven Method to Assess and Reduce Fragmentation in Multi-Party Political Systems
Pedro O. S. Vaz de Melo
In June 2013, Brazil faced the largest and most significant mass protests in a generation. These were exacerbated by the population's disenchantment towards its highly fragmented p…
You are What you Eat (and Drink): Identifying Cultural Boundaries by Analyzing Food & Drink Habits in Foursquare
Thiago H Silva, Pedro O S Vaz de Melo, Jussara Almeida +2
Food and drink are two of the most basic needs of human beings. However, as society evolved, food and drink became also a strong cultural aspect, being able to describe strong diff…
Universal and Distinct Properties of Communication Dynamics: How to Generate Realistic Inter-event Times
Pedro O. S. Vaz de Melo, Christos Faloutsos, Renato Assunção +2
With the advancement of information systems, means of communications are becoming cheaper, faster and more available. Today, millions of people carrying smart-phones or tablets are…