Search results for " SOCIAL NETWORK"

Capital social i xarxes relacionals en els processos de creació de conexement i innovació

2010

Fa aproximadament dues dècades, el concepte de capital social va ser integrat al debat i discurs sobre el desenvolupament, en termes d'un actiu de cooperació, reciprocitat i confiança, present en normes i valors, i en les relacions socials de certs grups. El concepte de capital social guarda relació amb la necessitat d'aprehendre en un sol concepte un conjunt de dimensions de la interacció col·lectiva, en les quals els individus s'han de situar a fi d'estructurar una interacció amb sentit i establir-se com a persones en la trama de normes i valors morals que constitueixen i construeixen la comunitat i la societat que es viu. Així, doncs, el capital social de forma implícita porta associada …

Mobile social networking in theory and practice

2008

Mobile social networks have gained the attention of the media, academy and mobile market. Despite of the robust tradition of network and community studies, mobile social networks are often addressed improperly. This paper presents a theoretical framework to study mobile social networking and examines the design implications of results of an exploratory study conducted with a group of 18 young adults in Finland. The findings of this study indicate that the quality of mobile applications offering social networking could be greatly increased by integrating the knowledge of two traditions that so far developed in parallel, namely the mathematical as well as social approaches to social networks.

Evaluation of Structural and Temporal Properties of Ego Networks for Data Availability in DOSNs

2017

The large diffusion of Online Social Networks (OSNs) has influenced the way people interact with each other. OSNs present several drawbacks, one of the most important is the problem of privacy disclosures. Distributed Online Social Networks (DOSNs) have been proposed as a valid alternative solution to solve this problem. DOSNs are Online Social Networks implemented on a distributed platform, such as a P2P system or a mobile network. However, the decentralization of the control presents several challenges, one of the main ones is guaranteeing data availability without relying on a central server. To this aim, users’ data allocation strategies have to be defined and this requires the knowledg…

Logical Key Hierarchy for Group Management in Distributed Online Social Networks

2016

Distributed Online Social Networks (DOSNs) have recently been proposed to shift the control over user data from a unique entity to the users of the DOSN themselves. In this paper, we focus our attention on the problem of privacy preserving content sharing to a large group of users of the DOSNs. Several solutions, based on cryptographic techniques, have been recently proposed. The main challenge here is the definition of a scalable and decentralized approach that: i) minimizes the re-encryption of the contents published in a group when the composition of the group changes and ii) enables a fast distribution of the cryptographic keys to all the members (n) of a group, each time a new user is …

Towards better privacy preservation by detecting personal events in photos shared within online social networks

2015

Today, social networking has considerably changed why people are taking pictures all the time everywhere they go. More than 500 million photos are uploaded and shared every day, along with more than 200 hours of videos every minute. More particularly, with the ubiquity of smartphones, social network users are now taking photos of events in their lives, travels, experiences, etc. and instantly uploading them online. Such public data sharing puts at risk the users’ privacy and expose them to a surveillance that is growing at a very rapid rate. Furthermore, new techniques are used today to extract publicly shared data and combine it with other data in ways never before thought possible. Howeve…

Criminal networks analysis in missing data scenarios through graph distances.

2021

Data collected in criminal investigations may suffer from: (i) incompleteness, due to the covert nature of criminal organisations; (ii) incorrectness, caused by either unintentional data collection errors and intentional deception by criminals; (iii) inconsistency, when the same information is collected into law enforcement databases multiple times, or in different formats. In this paper we analyse nine real criminal networks of different nature (i.e., Mafia networks, criminal street gangs and terrorist organizations) in order to quantify the impact of incomplete data and to determine which network type is most affected by it. The networks are firstly pruned following two specific methods: …

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…

“From Trust to Travel: the Role of Electronic Word of Mouth through Tourist Social Networks”

2013

The Role of Social and Collaborative Networks in the Development of in-House Multimedia Language Learning Materials

2012

The development of in-house language learning materials has being going on for many decades. In the past, it was difficult for language teachers worldwide to share their in-house materials with other teachers, and so was having access to the materials developed by others. This often produced a feeling of isolation and, very frequently, provoked a duplication of efforts and a bigger investment of time. However, thanks to the Web 2.0 teachers and practitioners worldwide can communicate with each other and share experiences and materials. While this aspect of the so-called Social Web has being successfully exploded in the past few decades, especially in the case of online communities of teache…

Electronic word of mouth (eWOM) in tourism

2012

This paper is based on the idea that user generated contents (UGC) about holidays, travels and destinations, widely propagated throughout modern social networks, have a topical relevance respect to the diffusion of the image of tourist destinations. More than other information transmission mechanisms, word of mouth (WOM) strongly influences consumer behavior and decision-making, especially when ‘experience goods’ (as in the case of tourism) difficult to be evaluated before their consumption are concerned (Wilson 1994; Griffin 1995; Silverman 1997; Rosen 2002; Dall’Ara, 2002; Lambin, 2004). The advances of ICT tools and the emergence of the Internet strongly influence word of mouth, since la…