Search Results for author: Gianmarco De Francisci Morales

Found 13 papers, 7 papers with code

Extracting the Multiscale Causal Backbone of Brain Dynamics

1 code implementation31 Oct 2023 Gabriele D'Acunto, Francesco Bonchi, Gianmarco De Francisci Morales, Giovanni Petri

The bulk of the research effort on brain connectivity revolves around statistical associations among brain regions, which do not directly relate to the causal mechanisms governing brain dynamics.

Learning Multiscale Non-stationary Causal Structures

no code implementations31 Aug 2022 Gabriele D'Acunto, Gianmarco De Francisci Morales, Paolo Bajardi, Francesco Bonchi

Our model allows sampling an MN-DAG according to user-specified priors on the time-dependence and multiscale properties of the causal graph.

Time Series Time Series Analysis +1

On learning agent-based models from data

no code implementations10 May 2022 Corrado Monti, Marco Pangallo, Gianmarco De Francisci Morales, Francesco Bonchi

In this paper, we propose a protocol to learn the latent micro-variables of an ABM from data.

The Evolving Causal Structure of Equity Risk Factors

no code implementations9 Nov 2021 Gabriele D'Acunto, Paolo Bajardi, Francesco Bonchi, Gianmarco De Francisci Morales

They link the evolution of the causal structure of equity risk factors with market volatility and a worsening macroeconomic environment, and show that, in times of financial crisis, exposure to different factors boils down to exposure to the market risk factor.

Management

Learning Opinion Dynamics From Social Traces

1 code implementation2 Jun 2020 Corrado Monti, Gianmarco De Francisci Morales, Francesco Bonchi

In this work we propose an inference mechanism for fitting a generative, agent-like model of opinion dynamics to real-world social traces.

Graph Mining Link Sign Prediction +3

Predicting the Role of Political Trolls in Social Media

1 code implementation CONLL 2019 Atanas Atanasov, Gianmarco De Francisci Morales, Preslav Nakov

In particular, we show how to classify trolls according to their political role ---left, news feed, right--- by using features extracted from social media, i. e., Twitter, in two scenarios: (i) in a traditional supervised learning scenario, where labels for trolls are available, and (ii) in a distant supervision scenario, where labels for trolls are not available, and we rely on more-commonly-available labels for news outlets mentioned by the trolls.

Link Prediction via Higher-Order Motif Features

1 code implementation8 Feb 2019 Ghadeer Abuoda, Gianmarco De Francisci Morales, Ashraf Aboulnaga

A common approach is to use features based on the common neighbors of an unconnected pair of nodes to predict whether the pair will form a link in the future.

General Classification Link Prediction +1

Political Discourse on Social Media: Echo Chambers, Gatekeepers, and the Price of Bipartisanship

1 code implementation5 Jan 2018 Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis

By comparing the two, we find that Twitter users are, to a large degree, exposed to political opinions that agree with their own.

Social and Information Networks

VHT: Vertical Hoeffding Tree

no code implementations28 Jul 2016 Nicolas Kourtellis, Gianmarco De Francisci Morales, Albert Bifet, Arinto Murdopo

IoT Big Data requires new machine learning methods able to scale to large size of data arriving at high speed.

BIG-bench Machine Learning

Partial Key Grouping: Load-Balanced Partitioning of Distributed Streams

2 code implementations26 Oct 2015 Muhammad Anis Uddin Nasir, Gianmarco De Francisci Morales, David Garcia-Soriano, Nicolas Kourtellis, Marco Serafini

We study the problem of load balancing in distributed stream processing engines, which is exacerbated in the presence of skew.

Distributed, Parallel, and Cluster Computing

Quantifying Controversy in Social Media

1 code implementation18 Jul 2015 Kiran Garimella, Gianmarco De Francisci Morales, Aristides Gionis, Michael Mathioudakis

Unlike previous work, rather than study controversy in a single hand-picked topic and use domain specific knowledge, we take a general approach to study topics in any domain.

Social and Information Networks

Says who? Automatic Text-Based Content Analysis of Television News

no code implementations18 Jul 2013 Carlos Castillo, Gianmarco De Francisci Morales, Marcelo Mendoza, Nasir Khan

We perform an automatic analysis of television news programs, based on the closed captions that accompany them.

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