Search results for "social networks."
showing 10 items of 157 documents
Knowledge Extraction from Biological and Social Graphs
2022
Many problems from the real life deal with the generation of enormous, varied, dynamic, and interconnected datasets coming from different and heterogeneous sources. This PhD Thesis focuses on the proposal of novel knowledge extraction techniques from graphs, mainly based on Big Data methodologies. Two application contexts are considered: Biological and Medical data, with the final aim of identifying biomarkers for diagnosis, treatment, prognosis, and prevention of diseases. Social data, for the optimization of advertising campaigns, the comparison of user profiles, and neighborhood analysis.
Analysis of Users Behaviour from a Movie Preferences Perspective
2018
Despite their tremendous popularity, Online Social Networks (OSNs) have several issues related to the privacy of social users. These issues have motivated researchers to develop OSN services that take advantage of the decentralized platforms (such as P2P systems or opportunistic networks). Decentralized Online Social Networks (DOSNs) need specific approaches to manage the decentralization of social data. In particular, data availability is one of the main issues and current proposals exploit properties of the social relationships to manage it. At the best of our knowledge, there are no proposals which exploit similarity between users, expressed with the term homophily. Homophily has been we…
Exploiting community detection to recommend privacy policies in decentralized online social networks
2018
The usage of Online Social Networks (OSNs) has become a daily activity for billions of people that share their contents and personal information with the other users. Regardless of the platform exploited to provide the OSNs’ services, these contents’ sharing could expose the OSNs’ users to a number of privacy risks if proper privacy-preserving mechanisms are not provided. Indeed, users must be able to define its own privacy policies that are exploited by the OSN to regulate access to the shared contents. To reduce such users’ privacy risks, we propose a Privacy Policies Recommended System (PPRS) that assists the users in defining their own privacy policies. Besides suggesting the most appro…
La libertà di espressione in rete fra content moderation dei social network e regolazione dell’Unione Europea
2022
Starting from the premise that digital society and advances in technology determine the need for adaptation, even if only in an interpretative sense, of the legal categories of constitutionalism, the study analyzes the new dimension of the freedom of expression of thought in the "digital environment". Through the examination of the different jurisprudential approaches expressed to protect this freedom in Europe and in the United States, the work also examines the role of social platforms, their power of self-regulation and that of content moderation, which will highlight the need for regulation of the phenomenon that balances the needs of protection of rights and those of technological adva…
La libertà di espressione nell’era dei social network fra content moderation e necessità di una regolazione flessibile
2023
Starting from the premise that digital society and advances in technology determine the need for adaptation, even if only in an interpretative sense, of the legal categories of constitutionalism, the study analyzes the new dimension of the freedom of expression of thought in the “digital environment”. Through the examination of the different jurisprudential approaches expressed to protect this freedom in Europe and in the United States, the work also examines the role of social platforms, their power of self-regulation and that of content moderation, which will highlight the need for regulation of the phenomenon that balances the needs of protection of rights and those of technological adva…
Significati vecchi e nuovi di ideologia: una rassegna
2020
Old ideologies, defined as «grand narratives», seem to have faded away, but this is not a conclusive argument to state that ideology has, itself, disappeared. In fact, there are strong reasons to believe that it has not. In the first part, this article offers a synthetic survey of some of the most significant conceptions of ideology in order to avoid the confusion generated by uncritical uses of the term. The vantage point of the analysis is the fundamental conceptual opposition between «ideology» and «praxis» («truth», or «reality»). The second part of the article opens up some questions about how the new forms of ideology may thrive in the new spaces created by the communication technolog…
Facebook as a Small World: a topological hypothesis
2011
Facebook is becoming a pervasive entity as its social, cultural and media ramifications grow deep and entrenched in our daily life. Its nature of a complex system of interactions, bearing a strong similarity to networks built through individual choices and systems shaped by evolu- tionary pressure, makes it an interesting target for research. Scale-free Small World networks, recently popularized by Barabasi, are a topological class pertaining to both these domains, whose members have resilience to disruption and short intermediate connections between nodes. In this paper we show that the topological structure of a specific subset of Facebook, gathered using data from a self-report online qu…
Utenti precoci di Pokémon Go - un report pilota sulle modalità di utilizzo
2016
Pokémon Go (PG) è una applicazione ludica gratuita per smartphone basata su tecnologie di realtà aumentata e di geolocazione lanciata sul mercato a fine di luglio del 2016 dalla società americana Niantic (Wilson, 2016). Scopo del gioco è trovare creature immaginarie appartenenti alla famiglia dei Pokémon, e per farlo è necessario spostarsi nel mondo reale. Una volta catturate, dette creature possono essere collezionate, allenate, e fatte combattere tra loro
Comportamenti individuali e connettivi in Facebook: uno studio simulativo
2010
Creazione di collegamenti a scambio di informazione nei social network. Una simulazione agent-based con metodologia soft computing.
2015
La robustezza di una rete sociale dipende da caratteristiche intrinseche della sua topologia, quali ad esempio l’invarianza di scala, la presenza di nodi denominati hub (i nodi più popolari del network, Barabási e Albert 1999), una distribuzione di probabilità esponenziale, come quella illustrata in Figura 1, nel grado dei vertici P(x) =x^(-α) con fattore α compreso tra 2 e 3, (come quella descritta da Albert e Barabási 2002); ma l’origine di queste caratteristiche va ricercata come emergente dal comportamento dei singoli componenti della rete, e non necessariamente nel suo complesso (in tal senso è emblematico il caso del World Wide Web, come descritto in Alb…