Search results for " Twitter"
showing 8 items of 18 documents
COURAGE at CheckThat! 2022: Harmful Tweet Detection using Graph Neural Networks and ELECTRA
2022
In this paper we propose a deep learning model based on graph machine learning (i.e. Graph Attention Convolution) and a pretrained transformer language model (i.e. ELECTRA). Our model was developed to detect harmful tweets about COVID-19 and was used to tackle subtask 1C (harmful tweet detection) at the CheckThat!Lab shared task organized as part of CLEF 2022. In this binary classification task, our proposed model reaches a binary F1 score (positive class label, i.e. harmful tweet) of 0.28 on the test set. We demonstrate that our approach outperforms the official baseline by 8% and describe our model as well as the experimental setup and results in detail. We also refer to limitations of th…
«IN ALTO I CUORI / L’ITALIA CAMBIA VERSO». DISCORSO POLITICO E INTERAZIONE NEI SOCIAL NETWORK
2016
Scopo della comunicazione è studiare la presenza dei politici italiani nei due social network con maggior numero di utenti (Facebook e Twitter). Nel dibattito sviluppatosi negli ultimi anni è stato sottolineato come il passaggio dal web 1.0 al web 2.0 (e ormai quasi 3.0) abbia portato a un avvicinamento fra politici e utenti/elettori/cittadini (in quest’ordine). Nel più generale contesto di “disintermediazione della comunicazione” (Bentivegna 2002), si è pensato (forse ci si è illusi) che il superamento del filtro rappresentato dai media tradizionali avrebbe creato un rapporto diretto fra politici e cittadini, quasi del tipo “dal produttore al consumatore”. Recenti lavori (ad esempio Spina …
Discorsi geneticamente modificati nella democrazia dello 'streaming'. Il nuovo ordine del discorso politico nell'Italia post-berlusconiana
2016
In this paper I discuss some features of Italian political discourse after the ending of the so called ‘berlusconismo’ (that is, the specific communicative style of Silvio Berlusconi, the leader of Italian right wing for almost two decades). In particular, I display the figure of Matteo Renzi, the current Italian Prime Minister and Secretary of PD, the most important Italian political party. In my work, I try to pinpoint the peculiarity of Renzi’s discourse strategies. In this vein, I suggest to use the notion of ‘disphasic discourse’, in order to underline the strong decrease of styles, genres and textual types variability characterizing his ways of communicating. I focus the attention on …
Orígenes de las movilizaciones #primaveravalenciana. Un análisis de los actores sociales más influyentes en Twitter
2018
Twitter publics have become consolidated research objects. The main aim of this article is to make a contribution to this research current by analysing the social conditions that gave shape to the hashtag #primaveravalenciana. In order to do this, this study shall follow an analysis of the early tweets giving shape to this phenomenon. This approach shall stablish a participant's typology, identifying the most influent actors and pursuying a content analysis of relevant micro-messages which pushed forward the hashtag's viral expansion in the next few days. Against theories which tend to minimise the social distinction of digital actors, data analysis shows that the hashtag's origins were in …
La movilización política en Twitter, una red para "pescar" votos
2020
GAMLSS for Big Data: Roc Curve prediction using Twitter data
2017
During last years, Big Data appears as one of the most innovative and growing scientific area of interest. In this field, finding reliable methods to make accurate predictions represents one of the most inspirational challenges. The way to make prediction in the following paper is the use of ROC (Receiver Operating Characteristic) Curve, a binary prediction tool, often used for medical tests. The attention is focused in particular on the implementation of ROC Curve in GAMLSS (Generalized Additive Models for Location Scale and Shape), semi-parametric models suitable for huge and flexible dataset. An application will be shown where the class of GAMLSS is applied to Twitter data in order to pr…
Osallistu, keskustele, vaikuta! – Näkökulmia sosiaaliseen televisioon ja livetviittaamiseen
2017
Tässä artikkelissa tarkastellaan nykymedialle tyypillistä yleisön osallistamisen, aktivoinnin ja vuorovaikutuksellisuuden pyrkimystä sosiaalisen television ja livetviittaamisen näkökulmasta. Käsitteet kietoutuvat virallisen hashtagin ympärille, jonka kautta televisio-ohjelmien tai muiden livetapahtumien yleisöt linkittävät itsensä osaksi tilapäistä hashtag-yhteisöä ja laajaa julkista keskustelua. Artikkelissa esitellään Twitterin live-käyttöä mediatapahtumaan osallistumisessa ja pohditaan, millaisia käyttömahdollisuuksia livetviittaamiseen ja sosiaaliseen televisioon liittyvät käytännöt voisivat tarjota opetusmetodeina. nonPeerReviewed
La politica su Twitter: analisi di rete e sentiment analysis d'un caso studio
2021
Le interazioni sociali e le opinioni riguardanti la politica, espresse su Twitter da leader, candidati, normali cittadini o influencer, occupano una grossa parte del dibattito politico contemporaneo. Esse possono essere studiate facendo ricorso a tecniche computazionali, che comportano l’estrazione e l’analisi d’una enorme quantità di dati. In questo contributo, mostro le potenzialità di due di queste tecniche: la social network analysis e la sentiment analysis, indagando – come caso studio – il tema della scuola, oggetto di dibattito politico e trending topic su Twitter, nel settembre del 2020. A tale scopo, metto a confronto due reti di discussione diverse, una tematica e l’altra personal…