Search results for " Social network analysis"

Robust link prediction in criminal networks: A case study of the Sicilian Mafia

2020

Abstract Link prediction exercises may prove particularly challenging with noisy and incomplete networks, such as criminal networks. Also, the link prediction effectiveness may vary across different relations within a social group. We address these issues by assessing the performance of different link prediction algorithms on a mafia organization. The analysis relies on an original dataset manually extracted from the judicial documents of operation “Montagna”, conducted by the Italian law enforcement agencies against individuals affiliated with the Sicilian Mafia. To run our analysis, we extracted two networks: one including meetings and one recording telephone calls among suspects, respect…

Italian Amateur Pop-Rock Musicians on Facebook: Mixed Methods and New Findings in Music Making Research

2017

This chapter investigates how and why amateur musicians use social networking sites, employing a mixed-methods approach. Attention is focused on four big Italian Facebook communities of pop-rock musicians: drums, bass, guitar, and keyboard players (overall, 2,101 active users), analyzing the relational and textual data extracted from the web. The chapter analyzes the network structures emerging from the interactions among the users. It also identifies and maps the main areas of discussion (sound shaping, studio recording, marketplace, musical references, computer production, and relations) and the latent semantic dimension characterizing Facebook users’ activities, through social network an…

Place Attachment and Its Consequence for Landscape-Scale Management and Readiness to Participate: Social Network Complexity in the Post-Soviet Rural …

2019

This paper uses the tripartite place attachment framework to examine six rural parishes across Estonia and Latvia. Existing analyses/frameworks on participatory processes often neglect the complexity of relationships that rural residents have to their local environments. From a qualitative analysis of face-to-face, semi-structured interviews with case study area inhabitants (23 interviews in Estonia and 27 in Latvia), we depict varying degrees of attachment of individuals to each other and to the place in which they live and their readiness to participate in terms of willingness and ability to participate in a landscape-scale management process. Attachment to the local area was strongest wh…

Social Network Analysis of Sicilian Mafia Interconnections

2019

In this paper, we focus on the study of Sicilian Mafia organizations through Social Network Analysis. We analyse datasets reflecting two different Mafia Families, based on examinations of digital trails and judicial documents, respectively. The first dataset includes the phone calls logs among suspected individuals. The second one is based on police traces of meeting that have taken place among different types of criminals. Our breakthrough is twofold. First in the method followed to generate these new datasets. Second, in the method used to carry out a quantitative phenomena investigation that are hard to evaluate. Our networks are weighted ones, with each weight catching the frequency of …

Reti mafiose. Cosa nostra e camorra: organizzazioni criminali a confronto

2011

Nella vastissima produzione editoriale sul fenomeno mafioso i gruppi criminali sono stati spesso rappresentati come organizzazioni verticistiche, fortemente centralizzate e gerarchizzate. Si è fatto spesso ricorso alla metafora della piramide, della burocrazia o dell'azienda, evidenziando, in tal modo, la presenza di una netta articolazione interna e di una precisa suddivisione dei ruoli e delle funzioni tra i singoli associati. Pur riconoscendo l'efficacia e la persistente attualità di una simile rappresentazione, questo volume guarda alle organizzazioni criminali da un punto di vista differente, adoperando una prospettiva di analisi di tipo relazionale. Le singole cosche possono essere, i…

La valorizzazione dell’agoralimentare di qualità e lo sviluppo del territorio

2012

Obiettivo dello studio è indagare la capacità di valorizzazione del patrimonio territoriale in alcuni ambienti della Sicilia (ricadenti nelle province Trapani) posti a confronto con un contesto di riferimento, individuato in Toscana (nella provincia di Siena). Questo studio ha indagato entrambe le aree attraverso due approcci complementari: la relazione tra le attività agricole e l’ambiente – con l’applicazione del DPSIR (Driving forces, Pressures, States, Impacts, Responses; Trisorio, 2004) – e il sistema relazionale degli operatori dei comprensori attraverso la SNA (Social Network Analysis). Si sono pertanto indagati gli aspetti relazionali del sistema produttivo del vino Alcamo DOC e del…

SVILUPPO RURALE E I NETWORK PLACE-BASED DELLE AREE MARGINALI: IL CASO SICILIA

American Horror Story e i suoi fan italiani: interazioni e costruzione del discorso on-line

2020

A partire dal concetto sociologico di “audience performativa”, che contraddistingue alcune forme della spettatorialità televisiva contemporanea, in questo contributo prendo in considerazione l’attività di produzione dei fan; in particolare, la produttività testuale e discorsiva, che è spesso riferita alle serie TV. Discuto, poi, il posto dell’horror nella narrazione seriale, traendo spunto da American Horror Story, la serie di successo ideata, nel 2011, da Ryan Murphy e Brad Falchuk. Quindi, attraverso una ricerca empirica di tipo quali-quantitativo, provo a descrivere e spiegare le modalità d’interazione e i discorsi dei fan italiani, iscritti ad una pagina Facebook dedicata alla serie, fa…

Riflessività, interazione e rispetto delle norme. Il contributo dei mixed methods tra analisi dei testi e social network analysis

2018

The book, through a special methodological mix that uses text analysis and social network analysis, explores the ways in which people, starting from some elements considered implicit, are able to problematize specific behaviours. People contribute differently to social change or reproduction, by selecting certain aspects of reality and attributing to these aspects power of constraint or facilitation. Starting from the theoretical approach of Margaret Archer, which looks at the reflexivity of social actors as the capacity to develop an internal conversation, which is able to mediate between structure and agency, the book deals with the dynamics that take place when reflexive types converse o…

Multilayer Network Analysis: The Identification of Key Actors in a Sicilian Mafia Operation

2021

Recently, Social Network Analysis studies have led to an improvement and to a generalization of existing tools to networks with multiple subsystems and layers of connectivity. These kind of networks are usually called multilayer networks. Multilayer networks in which each layer shares at least one node with some other layer in the network are called multiplex networks. Being a multiplex network does not require all nodes to exist on every layer. In this paper, we built a criminal multiplex network which concerns an anti-mafia operation called “Montagna” and it is based on the examination of a pre-trial detention order issued on March 14, 2007 by the judge for preliminary investigations of t…