Dissertations / Theses on the topic 'Réseaux sociaux (Internet) – Société'
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Zammar, Nisrine. "Réseaux Sociaux numériques : essai de catégorisation et cartographie des controverses." Phd thesis, Université Rennes 2, 2012. http://tel.archives-ouvertes.fr/tel-00687906.
Full textTaniguchi, Yoko. "Les enjeux de gouvernance territoriale face à l'innovation sociale et numérique : les exemples de Brest et de Lille." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1A022/document.
Full textWhile the efficiency of exogenous territorial development is questioned, territorial social innovation has become a rising issue both for researchers and professionals in the field of territorial development. From our point of view, territorial social innovation can be understood as a transformation of territorial governance in favor of citizen initiatives. Though most examples of territorial social innovation occur spontaneously, our concern is to model the innovation process and establish a methodology for territorial transformation in order to make happen this innovation. Our thesis was prepared at the consultancy agency “Le Cinquième Pôle” within the CIFRE industrial research agreement, and aims at elaborating strategies and instruments for territorial innovation. It studies territorial social innovation process and evaluate the potentials of social web for the territorial transformation. Collective action being one of the most important levers for theses transformations, our thesis analyzed the roles of social web in enhancing communities of citizen initiatives leaders and actors at local level. In particular, two cases were studied: Catalyst collective and Brest municipality’s digital strategy. A number of advantages of social web were found, for example, in maintaining weak ties, in sharing resources, in raising awareness and educating actors, in co-creating knowledge etc. However challenges remain, notably the uneasiness of using collaborative Internet devices and the lack of practice in sharing
Le, Cornec Ubertini Anne-Hélène. "Internet et la démocratie : les réseaux tels l'Internet sont-ils des outils susceptibles de renforcer la démocratie ?" Lorient, 2002. http://www.theses.fr/2002LORIS006.
Full textThovex, Christophe. "Réseaux de compétences : de l'analyse des réseaux sociaux à l'analyse prédictive de connaissances." Phd thesis, Nantes, 2012. https://archive.bu.univ-nantes.fr/pollux/show/show?id=9655d57c-574a-4377-8aa1-cc682eecb122.
Full textIn 1977, Freeman formalised generic measures of Social Networks Analysis (SNA). Then, the Web “2. 0” social networks have become global networks (e. G. , FaceBook, MSN). This thesis defines a semantic model, non probabilist and predictive, for the decisional analysis of professional and institutional social networks. The presented multidisciplinary model, in parallel to the Galam sociophysics, integrates some semantic methods of natural language processing and knowledge engineering, some measures of statistic sociology and some electrodynamic laws, applied to the economic performance and social climate optimisation. It has been developped and experimented in line with the Socioprise project, funded by the French State Secretariat for the prospective and development of the digital economy
Thovex, Christophe. "Réseaux de Compétences : de l'Analyse des Réseaux Sociaux à l'Analyse Prédictive de Connaissances." Phd thesis, Université de Nantes, 2012. http://tel.archives-ouvertes.fr/tel-00697798.
Full textRamrajsingh, Athissingh. "Les nouvelles technologies Web, facteur d'un glissement de la prérogative politique? : approche critico-discursive du mode d'existence idéologique du Web 2.0 révélant ses impensés et analyse des enjeux sur le plan macro-sociétal." Aix-Marseille 3, 2009. http://www.theses.fr/2009AIX32079.
Full textThe concept of “Web 2. 0” has been so much discussed since it was first introduced in September 2005, that it has become difficult to perceive all its technical, economic and political developments. This work proposes a critical approach to this concept with a view to revealing its full scope, which seems to be hidden, either consciously or unconsciously, by technical experts as well as political or economic actors. The first part of this research work is based upon the discursive analysis of a compendium of bloggers’ postings in order to characterise the way “Web 2. 0” is viewed by bloggers. Two major arguments support this representation, namely increasing participation to the creation of content and power seizure by Internet surfers. The second part puts both arguments to the test by studying the workings of a given community, then the “success” of “Web 2. 0” through what is referred to as “simultaneity paradox” by physicists. Lastly, this work proposes a political insight into “web 2. 0” by putting it back into perspective and by shedding light on the manner in which it is giving rise to a shift in prerogative from politicians to private actors in the Internet industry
Maes, Arnaud. "Intervention du triptyque communauté virtuelle, multinationales et techniques d'information et de communication sur la communication virtuelle des masses : enjeux et stratégie de gouvernance de l'internet et rôle des TIC dans la co-régulation société civile et multinationales marchandes : étude de cas : sportmalin.com, le site communautaire d'e-commerce des sports et des loisirs en France." Aix-Marseille 3, 2007. http://www.theses.fr/2007AIX32026.
Full textThe increasing of ICT accentuates the phenomenon of the virtual communities. Rather privileging the social aspect more than the technological aspect, the aim of this thesis is to understand communication and organization in these communities. The ground problem has been to study this increasing phenomenon in a community context. The investigations then focused on the analysis of a community site of e-business in sports awarded by numerous innovation prizes as model of a community constitution: sportmalin. Com. Therefore from a theoretical point of view, it is necessary to understand the ICT as “communicational actefacts”. The principal interest was to reveal that the community phenomenon mainly results from a mediation between three antinomic objects of the system but nevertheless linked together : the community technical tools, the mercantile stakes and the will of the members to share and exchange their knowledge. The survey led during twenty months teaches us that an adequacy is possible between a mercantile and a community problematics. Just like a cog of a system, every part (virtual communities, community tools, the ICT, marketing initiative and the multinationals) completes the other as well as remaining dependent with the others. The analysis grants that the whole phenomenon of virtual community is the sole result of strategy of actors and rational choices. Although the virtual communities seem to be the product of deliberately coordinated efforts of a set of actors, the human factor is the unstable variable of this community system. The conclusion of this research reveals that the “ virtual commercial community ”, such as we are going to describe it in this study, establishes the universal model of any virtual community artefact
Ferrer, Isabel. "L'immigration sud-américaine en Espagne : transfiguration d'une société vécue par les citoyens et vue à l'écran." Thesis, La Réunion, 2014. http://www.theses.fr/2014LARE0009/document.
Full textSpain's transition towards democracy has widely been acclaimed. Yet it is far from settling all its scores with the past. During the early days of democracy prudence prevailed in the political and social field. Then the 90s swept in and the country was overwhelmed by economic liberalism. In post-modern Spain growth rocketed and was served by an all pervading television which turned everything into a show. Meanwhile the migratory flow was reversed. The old mother country chiefly attracted South Americans. Foreigners were made invisible by a television dedicated to entertainment. Hence Spanish people were not ready to face cultural diversity and old racist prejudice reeking of colonial ethnocentricity reappeared. The economic crisis hit Spain in 2008 and living conditions deteriorated giving birth to a new social class «the precariat». Natives and foreigners protest together demanding a new model of society for the meta post-modern era. Internet is the meeting point for those who feel outraged (indignants, indignados) and accuse the traditional media of complicity with a system they reject
Khelifi, Meriem. "Le discours religieux dans les médias arabes : nouveau lieu de mobilisation." Electronic Thesis or Diss., Paris 8, 2017. http://www.theses.fr/2017PA080164.
Full textThe objective in this thesis was to study how the new religious discourse produced by the preachers in the religious satellite channels can give rise to the expression of a new form of mobilization. This study was carried out in the context of the Arab revolutions, and more specifically in Egypt, with some aspects of comparison with Algeria.The three axes on which we have articulated this research are the policy, the communication and the return of the actor as identified by A. Touraine.Taking as an example the speech of Amr Khaled, one of the most influential preachers of the Arab-Muslim world, we analyzed the product discourse and receptions made directly by the Egyptian public and more broadly by a wider audience , Via social networks
Najafi, Modjtaba. "L’espace public solidaire face aux séismes de Bam et d’Azerbaïdjan en 2003 et en 2012 : de l’Iran civil à l’Iran des réseaux." Thesis, Paris 3, 2019. http://www.theses.fr/2019PA030040.
Full textStudying the constitution of a united public during the earthquakes of Bam and Azerbaijan is the subject of this research. It tackles the issue with a pragmatist approach to show how techno-demographic and politico-social developments in the 2000s fostered the raising of the Iranian public during the earthquakes of Bam in 2003 and that of Azerbaijan in 2012.From this observation, this research aims at studying the contribution of citizen Internet users on the blogs and on the social networks, which allowed the gathering of the Iranians who made the investigation to check a problematic situation starting from the effects of the earthquakes to reach their causes.This thesis also analyses the media coverage of the Iranian press, either conservative or reformist, to discover the various aspects of these events.Based on discourse analysis, this research shows how the Iranian public sphere is closer to pragmatist approach and further away from Habermasian approach. According to the pragmatist approach, emotion is unifying and driving the individuals, it is conceived as a factor of unity and completeness in the experience. The emotions shared by the different actors of these events contributed to the creation of a We, brought together by a central objective. We see an emotional argument, characterized by the massive use of testimonies and stories, poems, metaphors and metonymies and images in a politico-social discourse. This study shows how indignant and shocked citizens gathered for the reconstruction of Iran.From this thesis work, arises the new image of contemporary Iran: civil Iran and networked Iran. The first is characterized by the emergence of a new civil society appeared particularly in the late 1990s and early 2000s and the second is distinguished by the expansion of the public sphere through the development of the internet including social networks
Tognacci, Selena. "Les mobilisations socio-numériques : de l’espace public numérique à la scène publique numérique, création de nouvelles sociabilités : le cas du #lundi14septembre sur TikTok." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCH015.
Full textSince 2017, the world has seen a new digital social network added to the list of existing ones: TikTok. In addition to recreational use, the platform has become a cross-disciplinary tool, serving the visibility of businesses, activist groups, public figures and politicians alike, but also enabling communities to come together and exchange. Mobilizing a hashtag allows individuals to come together and recognize each other. Thisis the starting point of this thesis, as the use of hashtags enables TikTok to reference content in order to build up its database. The aim is therefore to understand how socio-numerical mobilization by and for the general public works using a hashtag.The study focuses on a high school mobilization that took place in France in 2020, #lundi14septembre, during which girls demanded the right to go to school wearingcrop tops. Having noted the illusion of a digital public space and a militant dimension, this thesis will demonstrate that the characteristics of socio-numerical mobilizations give the feeling of amore equal voice without actually being part of a real democratic process. By understanding the stakes behind a mobilization on TikTok,this work will demonstrate that socio-numerical mobilizations are symptomatic of our modern society's move towards new characteristics where the individual takes precedence over the collective, and the social cause becomes secondary to the search for visibility, emancipation and recognition
Cambe, Jordan. "Understanding the complex dynamics of social systems with diverse formal tools." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN043/document.
Full textFor the past two decades, electronic devices have revolutionized the traceability of social phenomena. Social dynamics now leave numerical footprints, which can be analyzed to better understand collective behaviors. The development of large online social networks (like Facebook, Twitter and more generally mobile communications) and connected physical structures (like transportation networks and geolocalised social platforms) resulted in the emergence of large longitudinal datasets. These new datasets bring the opportunity to develop new methods to analyze temporal dynamics in and of these systems. Nowadays, the plurality of data available requires to adapt and combine a plurality of existing methods in order to enlarge the global vision that one has on such complex systems. The purpose of this thesis is to explore the dynamics of social systems using three sets of tools: network science, statistical physics modeling and machine learning. This thesis starts by giving general definitions and some historical context on the methods mentioned above. After that, we show the complex dynamics induced by introducing an infinitesimal quantity of new agents to a Schelling-like model and discuss the limitations of statistical model simulation. The third chapter shows the added value of using longitudinal data. We study the behavior evolution of bike sharing system users and analyze the results of an unsupervised machine learning model aiming to classify users based on their profiles. The fourth chapter explores the differences between global and local methods for temporal community detection using scientometric networks. The last chapter merges complex network analysis and supervised machine learning in order to describe and predict the impact of new businesses on already established ones. We explore the temporal evolution of this impact and show the benefit of combining networks topology measures with machine learning algorithms
Ouergli, Faika. "La promotion des valeurs olympiques au sein des communautés virtuelles : le cas de Facebook." Phd thesis, Université Nice Sophia Antipolis, 2014. http://tel.archives-ouvertes.fr/tel-00993225.
Full textCardoso, Gonçalves Ludmille. "L'expérience post moderne du citoyen brésilien : "Sitoyen" sensible vivant dans la démocratie totalitaire." Phd thesis, Université Paul Valéry - Montpellier III, 2013. http://tel.archives-ouvertes.fr/tel-00980286.
Full textTrainoir, Marianne. "Ethnographie des pratiques numériques des personnes à la rue." Thesis, Rennes 2, 2017. http://www.theses.fr/2017REN20063/document.
Full textHomelessness is studied within two paradigms: the critical approach, which emphasizes the phenomena of social domination and the interactionist approach that underlines the successive adaptations that individuals implement. Those adaptations are studied through particular situations within which the "homeless" identity is built and a career takes shape. That career is looked at either as a un-socialization career or as a survival career in which self-preservation forms a daily and biographical perspective. In this context, working on issues such as "Getting off the streets" and "Home" paves the way for a renewed approach to self-preservation beyond situational facework. In this perspective, our ethnography of digital practices forms a practical support for self-preservation. Our fieldwork within social support structures shows that all the people surveyed, despite their heterogeneity, experience wandering as an intimate and social experience, and as a form of extreme precariousness which is lived between street and assistance, and marked by a self-weakening and an alteration of the capacity to look to the future. This experience is punctuated by many trials, gathered in a struggle for self-preservation. Self-preservation is then both a daily concern and a biographical question encompassing past, present and future temporalities. It is a work in the daily reality of survival but also through a memory work, selfpresentation, self-experimentation and self-projection. If the struggle against disengagement is almost invisible, digital practices offer a new approach for observation and analysis. Digital uses make it possible to access to rights and margins of autonomy. They also support friendship and family links. Between private and public life, digital uses allow homeless people to set up times and spaces to care about themselves. Eventually, our study also shows that digital uses create an ambivalent form of support: sometimes enabling, sometimes disqualifying. Indeed, it can turn against the subject, feeding identity crumbling and strengthening the solitude and unworthiness feelings
Sakho, Jimbira Mohamed. "Facebook, un espace d’expression et de visibilité religieuse : le cas de l’islam (2012-2014)." Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0253.
Full textSocial networks are an integral part of the lives of millions of French people, and Facebook is a privileged space for expression and representation of identity and community. Given the fact that many users who define themselves as French and Muslims create on this global social network pages, groups and profiles dedicated to Islam, we wanted to question, especially in a context where Islam regularly occupies the media agenda, the logics underlying their presence on this social network. Far from any normative consideration, the aim is to move the gaze towards the actors through the analysis of the way in which they are defined and consider their uses. More generally, our problem is part of a comprehensive framework to see how Facebook - as a sociotechnical device - succeeds in shifting the boundaries traditionally devoted to Muslim religious expressions in a secular country like France
Le, Crosnier Hervé. "Réseau, bibliothèques et documents numériques : architecture informatique et construction sociale." Habilitation à diriger des recherches, Université de Caen, 2007. http://tel.archives-ouvertes.fr/tel-00204139.
Full textAvec le développement accéléré du numérique et des réseaux, nous sommes les témoins d'un basculement fantastique des activités humaines, qui porte sur l'expression de la culture et de la communication, la transformation des processus industriels, les relations inter-personnelles, les activités de travail et de loisir des individus, les conditions d'exercice de la démocratie.
En moins d'une vingtaine d'années, le nombre et la puissance des ordinateurs mis dans les mains des individus a explosé, offrant aux personnes et aux groupes une capacité de traitement inimaginable auparavant. Leur couplage avec l'interconnexion des réseaux a bousculé la donne culturelle, relationnelle, économique, politique, géopolitique, éducative, sociale, médiatique....
La maîtrise de techniques symboliques (traitement d'images, stockage de fichiers numériques, usage du réseau comme ressource d'information, recherche documentaire, transcodage de la musique, écriture et publication personnelle) s'est répandue comme une traînée de poudre dans le monde entier.
Les tranches d'âge concernées se sont élargies en quelques années. La jeunesse et plus encore l'adolescence faisant un large usage des médiations techniques dans sa sociabilité et son apprentissage personnel. Le troisième âge découvre avec intérêt les techniques numériques, de l'appareil photo au mail, qui les gardent en contact avec leur descendance. Les différences d'usage entre les sexes se réduisent, et le travail des groupes de femmes pour utiliser la technologie comme un outil d'égalité et de libération porte des fruits dans tous les types de communautés, notamment dans les pays en développement.
Les divers réseaux et pratiques immatérielles convergent de plus en plus vite vers un réseau ubiquitaire, mêlant intimement les activités de communication, de production symbolique (culture, connaissance et divertissement) et de diffusion. Les terminaux se diversifient, se font mobiles (baladeurs, ordinateurs portables, PDA, téléphones mobiles nouvelle génération...) et s'incrustent dans toutes les activités (travail, culture, loisir, vie quotidienne).
Les principes d'individualité, de vie privée, d'autonomie et même de citoyenneté ne sont plus des qualités intrinsèques aux personnes, mais ressortent de l'émergence de " technologies de la personnalité " et de systèmes d'exposition et de gestion de la personnalité (réseaux sociaux, systèmes d'identification, auto-publication, partage d'environnements culturels ou de jeux, mondes virtuels...).
Le " système nerveux " de l'économie mondiale repose sur ces échanges immatériels accrus, sur les formes nouvelles de production qu'ils permettent, et sur la valorisation et la monétarisation des activités de connaissance, de communication, d'éducation et d'échange. Ces événements technologiques accompagnent et rendent possibles, ou imaginables, d'autres bouleversements dans l'organisation du monde, souvent regroupés sous le terme de " mondialisation " d'une part et de " société de l'information " de l'autre.
Ces bouleversements massifs et en profondeur méritent une attention particulière de la recherche, afin d'analyser ce phénomène au moment même de son bouillonnement, et d'en dégager des principes, des concepts et des grilles d'analyse qui permettent :
- de proposer de nouvelles applications, protocoles et architectures, d'une part pour les sciences de l'ingénieur ;
- de replacer les pratiques sociales, économiques et culturelles qui se cristallisent et se recomposent dans le réseau et le numérique, au sein du fil global de l'histoire et des données de long terme ;
- de repérer les fractures qui se constituent, afin que les sciences humaines et sociales puissent jouer un rôle éclairant pour les citoyens et les acteurs politiques et économiques.
[...] et les derniers mots de la conclusion
Les questions du domaine public et des biens communs de l'information, parce qu'elles permettent d'imaginer une société dans laquelle la transmission et le partage des connaissances serait un moment essentiel de la socialisation et de la vie collective me semblent des questions centrales, qu'il faut encore polir et repolir sur le métier de la recherche sur le document numérique et les réseaux.
Le numérique nous apporte des promesses inégalées de coopération et d'extension de la culture et de la connaissance. Comment permettre à tous les habitants de la planète d'en profiter ? Quels verrous faut ils ouvrir ? Quels ressorts de rêve et d'utopie peuvent être remontés pour que se libère une énergie libératrice ? Comment les réflexions techniques peuvent-elles accompagner un projet social mondial ?
Le chercheur, l'intellectuel et le citoyen sont convoqués pour travailler la compréhension de cet univers du numérique qui irrigue et transforme si profondément nos sociétés. Et faire coopérer les solutions techniques, juridiques, sociales et organisationnelles pour ouvrir des espaces publics mondiaux nouveaux. Ici et maintenant.
Grebennikova, Krasautsava Iryna. "Internet et les nouvelles formes de sociabilité à travers les "chats"." Grenoble 3, 2007. http://www.theses.fr/2007GRE39007.
Full textOur research project studies the use of public Francophone chat rooms. We conceptualize chats as the medium that provides access to new forms of communication, and have studied the forms of sociability that are intertwined through this medium. We have structured our study in three parts. The first part deals with the theoretical approaches on the uses of ICT (Information and Communication Technologies). In this part we applied an ethnological approach in order to observe the social networks and analyze the place that this technology occupies among the exchanges between the different members of the network. This perspective allowed us to consider the chat as a social element that connects individuals among themselves. The second part of the thesis presents the historical aspects of the evolution of the communicational practices as well as the changes brought upon in the day to day ways of life. On the third and last part of this work we conceptualize the chat as an instrument of contemporary sociability. We described the characteristic of this medium, analyzed the different types of chats, how they work and how they are applied. We conclude by presenting the main results obtained from the questionnaire applied to the users, and we analyzed the results obtained from an observation of a group that used the chat room called "Voilà"
Diallo, Papa Fary. "Aspects socioculturels et temporels dans les ontologies pour les communautés virtuelles." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4055/document.
Full textTemporal aspects to allow Senegalese communities to share and to co-constructtheir sociocultural knowledge. Indeed, with the globalization it is very commonto meet Senegalese youth knowing more about the geography of the West thanits own country. Thus, to refresh the memory of our fellow citizens, we initiatedthe establishment of an online application that allows them to share and coconstructtheir cultural heritage.Our proposals are based on social and semantic web technologies. indeed,social web proposes a framework where value is created by the aggregation ofmany individual user contributions. The semantic web enables to find, tocombine and to share resources, not only between humans but also betweenmachines. The combination of these two technologies enables Senegalesecommunities to share and co-construct their cultural heritage in a collaborativeand semantic framework.Our contributions include to (i) propose ontologies to annotate socioculturalresources and (ii) provide a collaborative framework to Senegalesecommunities. Ontologies are backbone of the semantic web and allow tocharacterize a domain. Thus, we defined two ontologies : 1) a socioculturalontology based on cultural-historical activity theory and 2) a temporal ontologyto annotate temporally sociocultural resources. We also defined a virtualcommunity called cultural knowledge-building community and proposed aprototype that integrates our contributions
Joly, Adrien. "A Context Management Framework based on Wisdom of Crowds for Social Awareness applications." Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0081/these.pdf.
Full textA l'heure où les sites de réseaux sociaux transforment les usages sur le Web, les échanges entre personnes deviennent de plus en plus faciles, ludiques et riches. Le partage en temps réel de nouvelles, d'humeurs, et autres contenus (personnels ou personnellement sélectionnés) permet de tisser, de maintenir et de renforcer des liens sociaux entre personnes à des échelles encore inédites. Cependant, la quantité sans cesse croissante d'information circulant sur ces réseaux, souvent en temps réel, motive une régulation des signaux (ici appelées "interactions médiatisées"), de manière à réduire le temps nécessaire pour suivre ses réseaux sociaux, et modérer les interruptions induites, non favorables à une bonne productivité sur le traitement de tâches demandant une attention continue. Dans le cadre de cette thèse, nous avons développé un système de filtrage et de recommandation de ces signaux qui repose sur la similarité contextuelle entre utilisateurs, producteurs et consommateurs de ces signaux, pour évaluer leur pertinence. Notre approche consiste à agréger et interpréter les données de contexte sur les terminaux des utilisateurs, sous forme de mots-clés pondérés (tags), avant qu'elles ne puissent être exploitées par le serveur de recommandation, à la demande de l'utilisateur. Dans ce mémoire, nous présenterons un état de l'art couvrant la gestion de données contextuelles, les réseaux sociaux et leurs pratiques actuelles sur internet, et des techniques de recherche d'information. Ensuite, nous proposerons une formalisation de notre problématique de filtrage contextuel, l'implémentation d'une application de réseautage social d'entreprise, et nous discuterons les résultats expérimentaux obtenus auprès d'utilisateurs
Rasool, Farasat. "Analysis of the role of communication devices shared on the internet - web 2.0 in the process of emergence of public sphere and democratization of Pakistan civil society." Thesis, Dijon, 2013. http://www.theses.fr/2013DIJOL027/document.
Full textIn this thesis, the first study of its kind, the role of internet specially that of social networking shared devices on web 2.0 is analyzed in the process of emergence of Public Sphere – the notion introduced by Habermas, and ultimately in the process of democratization of civil society in Pakistan. Lawyers’ Movement (March 2007 – March 2009) of Pakistan is selected to analyze this role as this successful movement for the rule of law in the country is solely responsible for a fundamental democratic change in the democratic culture and socio-political set up of Pakistan by bringing a vibrant and active civil society in the lime light of country’s political and social life.The content in Pakistani press and social communication content in blogs on blog sites during the course of and related to Lawyers’ Movement are analyzed using the technique of content analysis as defined by Lasswell Harold, focusing mainly on the content of communication (said what?) for a qualitative as well as quantitative analysis.The fundamental questions of the emergence of Public Sphere with the help of internet found to be true as it enhances the circle and forum of national public debate to the ones who had not been able to take part in it at the same level via the traditional means of mass communication, confirming the concept of Enhanced Public Sphere with the advent of internet presented by Cardon and also the concept of more participative democracy by Oberdorff by providing a platform to the educated middle class for voicing their opinion and ultimately filling the gap between the common people and intelligentsia of the society and taking active part in democratization of the society. The subsequent findings of the study reveal that there exists a freedom of expression not only on the internet but in the Pakistani press as well, that there is a link between the discussion in the press and in blogs and this discussion is concurrent, that internet has not yet presented itself as an alternate and better source for the flow of information confirming the criticism of Breton on the cult of internet and that the internet is instead behaving as complementary to the traditional media
Lee, Jong Gun. "User behavior modeling of content generation and consumption in online social networks." Paris 6, 2011. http://www.theses.fr/2011PA066032.
Full textBacha, Joelle. "Réseaux sociaux et autonomisation des adolescents." Phd thesis, Université de Cergy Pontoise, 2013. http://tel.archives-ouvertes.fr/tel-00957080.
Full textPortilla, Yonathan. "Etude des Réseaux Sociaux : modélisation et analyse." Thesis, Avignon, 2019. http://www.theses.fr/2019AVIG0235.
Full textCurrently social networks focus on the sharing and exchange of opinions, videos, photos, music,news and others informations, one of its objectives is to establish direct and indirect linkswith users. Social networks also promote products, people (their political or artistic image) orinfluential brands.Social networks are changing rapidly, so we’re looking to see the evolution of these sharingtools, and see how social networks change over time.We have the opportunity to study the events that occur in social networks thanks to the amount ofdata they produce. In the current market there are tools that allow the analysis of social networks,but most tools are not free, and 100% free tools disappear over time. For this reason we decidedto produce computer tools able to extract and analyse the data of the social networks studied.This study begins with the state of the art, where we describe the context of the problem, thework that led to this study and a summary of the contributions made during the thesis that wepresent briefly in the rest of the abstract.i. First we focus on the geo-linguistic fingerprint and language evolution in Twitter. Accessto content of messages sent by a group of subscribers of a social network may be usedto identify and quantify some features of a group. The feature can represent the level ofinterest in an event or product, or the popularity of an idea, or of a musical hit, or of apolitical figure. The feature can also represent how language is used and transformed,how words are written and how new grammatical rules appear.ii. Then we study the evolution of the cultural phenomenon called meme in social networks.Memes were defined by R. Dowkins as a cultural phenomenon that spreads through nongeneticforms. We examine three of the most popular memes of the internet and examinetheir impact on society in the Mediterranean countries. We use for analysing Google Trends, Topsy (a tool to measure the popularity of words on Twitter) and YouTube toquantify the impact of memes in the Mediterranean society.iii. After that we study the YouTube recommendation graph based on measurements andstochastic tools. We confirm that recommendation lists influence the views of a video.We focus on the recommendation system that boosts the popularity of videos. We buildfirst a graph that captures the recommendation system in YouTube and we study the relationshipbetween the number of views of a video and the average number of views of avideo in its recommendation list.iv. To conclude we describe the online tools available and the tools that we developed duringthe thesis. The online tools Topsy, Trendistic and Google Trends allowed us to analyseplatforms like YouTube and Twitter. We also produced tools based on API’s: in Twitterwe used the Streaming function to download and analyse tweets, with the Topsy APIwe studied the evolution of the language and the use of words, and the YouTube’s APIsallowed us to describe the behaviour on the lists of recommendations and the popularityof videos
Dahimene, Mohammed Ryadh. "Filtrage et Recommandation sur les Réseaux Sociaux." Electronic Thesis or Diss., Paris, CNAM, 2014. http://www.theses.fr/2014CNAM0945.
Full textIn the last years, the amount of available data on the social Web has exploded. For the average user, it became hard to find quality content without being overwhelmed with publications. For service providers, the scalability of such services became a challenging task. The aim of this thesis is to achieve a better user experience by offering the filtering and recommendation features. Filtering consists to provide for a given user, the ability of receiving only a subset of the publications from the direct network. Where recommendation allows content discovery by suggesting relevant content producers on given topics. We developed MicroFilter, a scalable filtering system able to handle Web-like data flows and RecLand, a recommender system that takes advantage of the network topology as well as the content in order to provide relevant recommendations
Cutillo, Leucio Antonio. "Protection des données privées dans les réseaux sociaux." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0020.
Full textOnline Social Network (OSN) applications allow users of all ages and educational background to easily share a wide range of personal information with a theoretically unlimited number of partners. This advantage comes at the cost of increased security and privacy exposures for users, since in all existing OSN applications, to underpin a promising business model, users' data is collected and stored permanently at the databases of the service provider, which potentially becomes a “Big Brother” capable of exploiting this data in many ways that can violate the privacy of individual users or user groups. This thesis suggests and validates a new approach to tackle these security and privacy problems. In order to ensure users' privacy in the face of potential privacy violations by the provider, the suggested approach adopts a distributed architecture relying on cooperation among a number of independent parties that are also the users of the online social network application. The second strong point of the suggested approach is to capitalize on the trust relationships that are part of social networks in real life in order to cope with the problem of building trusted and privacy-preserving mechanisms as part of the online application. Based on these main design principles, a new distributed Online Social Network, namely Safebook, is proposed: Safebook leverages on real life trust and allows users to maintain the control on the access and the usage of their own data. The prototype of Safebook is available at www.safebook.eu
Huynh, The Dang. "Extension de PageRank et application aux réseaux sociaux." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066114.
Full textRanking objects is one of the important and typical issues in our daily life. Many applications need to rank objects according to certain criteria, as simple as ranking students in a class according to average grades, or more complicated as ranking universities. Ranking objects means to arrange them in accordance with some criteria depending on the specific application.In the era of the Internet, a typical problem emerging in the last decades is the ranking of results returned by search engines. In conventional search engines (like Google, Yahoo or Bing ), the importance of a web page is the basis for ranking. This value is determined based on the analysis of graph links between web pages. With a set of documents V={v1, ..., vn}, when there is a user’s query q arriving, the search engine looks for documents in V matching the query q, then sorts the documents according to their relevance to the query in descending order. This process can be done thanks to a ranking function which allows us to compute the similarity s(q,vi) between the query q and a document vi ∈ V . Obviously, the ranking function can be seen as the core and significantly determines the quality of the search engine
Cutillo, Leucio Antonio. "Protection des données privées dans les réseaux sociaux." Phd thesis, Télécom ParisTech, 2012. http://pastel.archives-ouvertes.fr/pastel-00932360.
Full textPietiläinen, Anna-Kaisa. "Opportunistic mobile social networks at work." Paris 6, 2010. http://www.theses.fr/2010PA066587.
Full textNossenko, Hercberg Ekaterina. "Les sites web des réseaux féminins professionnels : analyses sémiologiques, linguistiques (lexicale, sémantique et discursive), communicationnelles." Paris 5, 2010. http://www.theses.fr/2010PA05H023.
Full textUsing the theoretical and methodological framework of Anne-Marie Houdebine : the semiology of indices, I studied a socio-cultural phenomenon, that of professional women’s networks, through the semiotization in a corpus formed from their web sites. Thanks to a lexical- semantic analysis of the lexeme network we were able to prove that the meaning evolved : denotation as net-like arrangement of threads, wires, almost like a trap is replaced by a set of individuals who are somehow connected. Nowadays, danger is for those outside of the network and no longer for those trapped into. The semiological analysis of a corpus formed by professional women's networks shows a unifying indicial signifier characterizing the iconic and linguistic depictions we call with the seme of . The latter allows for interpretations which evoke meaning effects related to the social status of women and their place in the professional world. A cultural imaginary emerges and is found through an alliance of contradictions : women’s networking is characterized, on the one hand, by an ideology of modernity conveyed through a virtual community, and on the other, an archaic ideology that, through underlying messages, reveals a tribal life stigmatizing the image of the woman alone in public space
Letonturier, Éric. "Réseau et société : Emergence et avatars socio-historiques d'une notion polysémique." Paris 5, 2000. http://www.theses.fr/2000PA05H062.
Full textLeprovost, Damien. "Découverte et analyse des communautés implicites par une approche sémantique en ligne : l'outil WebTribe." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00866489.
Full textHugon, Stéphane. "Circumnavigations : la construction sociale de l'identité en ligne." Paris 5, 2007. http://www.theses.fr/2007PA05H011.
Full textStarting from an investigation of ground near users of the Internet, the thesis proposes to regard the success of the communications on line(chat, blog) as an evidence of a deep change of our society, in particular affecting social construction of the identity and nature of the social bond. The thesis poses the assumption that the success of these social forms is linked to the presence of imaginary which is former for him, imaginary drift and navigation, present in testimonys of the users met, and in a whole side of the European culture. Moreover, the experiment of the Net surfer is inseparable from one report/ratio to the machine. If the social history of technics were the place of a critical thought a long time on the boarding of the individual, it seems that the social re-appropriations of the computers give the sign of a form of réenchantement by the creation of social bond and of a culture resolutely directed towards the ludic one and the oneiric one
Yang, Wenjing. "Maximisation d'influence dans les réseaux sociaux." Electronic Thesis or Diss., Aix-Marseille, 2019. http://theses.univ-amu.fr.lama.univ-amu.fr/191129_YANG_852tol142jmlj781pehwkj336i_TH.pdf.
Full textIn recent years, a large number of social network sites have appeared to connect people and groups together. Networks have been proven to be a good tool to share information and communicate ideas. Influence propagation occurs when an individual’s opinions or behaviors change as a result of interactions with others. The influence maximization problem aims to identify a subset of initial adopters in a social network to maximize the influence propagation. There are two progressive models most used in the analysis of social networks, namely the independent cascade model and the linear threshold model. As a type of epidemic models, the independent cascade model assumes that an individual adopts an innovationwith a certain probability if at least one of its in-neighbors has adopted it. Differently, the linear threshold model assumes that an individual adopts an innovation if a certain ratio of its in-neighbors have already adopted it. The thesis addresses three problems: influence propagation computation, influence maximization by seed selection and influence maximization by link activation. The influence propagation computationconsist in computing the probability that each node can be activated given a certain set of initial adopters. We propose the PathMethod to give an exact result, the SSS-Noself algorithm and the SSS-Bounded-Path algorithm to give an approximate result. The influence maximization by seed selection consist in maximizing the final influence propagation by targeting a seed set of certain cardinality. We initially propose the problem of influence maximization by link activation. Various properties of this problem and some sub-optimal solutions are given
Hagenbach, Jeanne. "Communication stratégique et réseaux." Phd thesis, Université Panthéon-Sorbonne - Paris I, 2009. http://tel.archives-ouvertes.fr/tel-00450632.
Full textClément-Schneider, Élisabeth. "Économie scripturale des adolescents : enquête sur les usages de l'écrit de lycéens." Phd thesis, Université de Caen, 2013. http://tel.archives-ouvertes.fr/tel-00911228.
Full textVeyrat, Marc. "La société i matériel : de l'information comme matériau artistique." Paris 1, 2006. http://www.theses.fr/2006PA010589.
Full textDahimene, Mohammed Ryadh. "Filtrage et Recommandation sur les Réseaux Sociaux." Thesis, Paris, CNAM, 2014. http://www.theses.fr/2015CNAM0945/document.
Full textIn the last years, the amount of available data on the social Web has exploded. For the average user, it became hard to find quality content without being overwhelmed with publications. For service providers, the scalability of such services became a challenging task. The aim of this thesis is to achieve a better user experience by offering the filtering and recommendation features. Filtering consists to provide for a given user, the ability of receiving only a subset of the publications from the direct network. Where recommendation allows content discovery by suggesting relevant content producers on given topics. We developed MicroFilter, a scalable filtering system able to handle Web-like data flows and RecLand, a recommender system that takes advantage of the network topology as well as the content in order to provide relevant recommendations
Huynh, The Dang. "Extension de PageRank et application aux réseaux sociaux." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066114/document.
Full textRanking objects is one of the important and typical issues in our daily life. Many applications need to rank objects according to certain criteria, as simple as ranking students in a class according to average grades, or more complicated as ranking universities. Ranking objects means to arrange them in accordance with some criteria depending on the specific application.In the era of the Internet, a typical problem emerging in the last decades is the ranking of results returned by search engines. In conventional search engines (like Google, Yahoo or Bing ), the importance of a web page is the basis for ranking. This value is determined based on the analysis of graph links between web pages. With a set of documents V={v1, ..., vn}, when there is a user’s query q arriving, the search engine looks for documents in V matching the query q, then sorts the documents according to their relevance to the query in descending order. This process can be done thanks to a ranking function which allows us to compute the similarity s(q,vi) between the query q and a document vi ∈ V . Obviously, the ranking function can be seen as the core and significantly determines the quality of the search engine
Mahabir, Laetitia-Amanda. "L'identité personnelle et les réseaux sociaux." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM1015.
Full textThe identity of people in the digital space cannot be defined in one way. Its mode of expression is multiple. In fact, an individual can have several identities in the digital environment. It can also play different social roles according to social contexts that it faces. But what are effects of using identity masks ? The individual's identity within the social networks refers to the self-questioning, and others. The individualistic side and the community side of this identity are the foundation of the building of user's identity. Moreover, it appears that the wealth and the complexity of networks are the result of the confusion made by the law between individual and identity. In fact, the law is based on an essentialist conception of identity, by which each player has its own trajectory. But the individual does not live alone, he lives in a group and it is part of a network of social relations. The identity is made in the interaction of a claimed identity for oneself and assigned by others. Also, develop a personal identity on the fringes of the digital reality is to distinguish the person of the concept of online presence which is eminently declarative and performative.All this leads to reconsider the place of identity in the digital space. To understand the question of the construction of personal identity in social network, different approaches will be detailed. Those approaches are aimed to ensure everyone an identity according his wishes. Also, it will be necessary to adapt the existing measures to the virtual reality, in order to establish a more secure regime of personal identity, in respect of the rights of each user's personnality
Maniu, Silviu. "Gestion des données dans les réseaux sociaux." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0053.
Full textWe address in this thesis some of the issues raised by the emergence of social applications on the Web, focusing on two important directions: efficient social search inonline applications and the inference of signed social links from interactions between users in collaborative Web applications. We start by considering social search in tagging (or bookmarking) applications. This problem requires a significant departure from existing, socially agnostic techniques. In a network-aware context, one can (and should) exploit the social links, which can indicate how users relate to the seeker and how much weight their tagging actions should have in the result build-up. We propose an algorithm that has the potential to scale to current applications, and validate it via extensive experiments. As social search applications can be thought of as part of a wider class of context-aware applications, we consider context-aware query optimization based on views, focusing on two important sub-problems. First, handling the possible differences in context between the various views and an input query leads to view results having uncertain scores, i.e., score ranges valid for the new context. As a consequence, current top-k algorithms are no longer directly applicable and need to be adapted to handle such uncertainty in object scores. Second, adapted view selection techniques are needed, which can leverage both the descriptions of queries and statistics over their results. Finally, we present an approach for inferring a signed network (a "web of trust")from user-generated content in Wikipedia. We investigate mechanisms by which relationships between Wikipedia contributors - in the form of signed directed links - can be inferred based their interactions. Our study sheds light into principles underlying a signed network that is captured by social interaction. We investigate whether this network over Wikipedia contributors represents indeed a plausible configuration of link signs, by studying its global and local network properties, and at an application level, by assessing its impact in the classification of Wikipedia articles.javascript:nouvelleZone('abstract');_ajtAbstract('abstract')
Lagnier, Cédric. "Diffusion de l'information dans les réseaux sociaux." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENM072/document.
Full textPredicting the diffusion of information in social networks is a key problem for applications like Opinion Leader Detection, Buzz Detection or Viral Marketing. Many recent diffusion models are direct extensions of the Cascade and Threshold models, initially proposed for epidemiology and social studies. In such models, the diffusion process is based on the dynamics of interactions between neighbor nodes in the network (the social pressure), and largely ignores important dimensions as the content diffused and the active/passive role users tend to have in social networks. We propose here a new family of models that aims at predicting how a content diffuses in a network by making use of additional dimensions : the content diffused, user's profile and willingness to diffuse. In particular, we show how to integrate these dimensions into simple feature functions, and propose a probabilistic modeling to account for the diffusion process. These models are then illustrated and compared with other approaches on two blog datasets. The experimental results obtained on these datasets show that taking into account these dimensions are important to accurately model the diffusion process. Lastly, we study the influence maximization problem with these models and prove that it is NP-hard, prior to propose an adaptation of the greedy algorithm to approximate the optimal solution
Laslier, Pierre-François. "Réseaux sociaux numériques et responsabilité pénale." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0119.
Full textSpearheading the democratization of online speech, social networks have undoubtedly revolutionized our informational landscape by offering everyone the opportunity to express themselves and connect with others. Bearers of hope, these platforms have also contributed to the emergence of new forms of infringement that criminal law could not ignore. Digital raids, hate speech, sexual offences, deceit and offences to the personality, are some of the unlawful acts that are amplified by social networks, and that ultimately justify resorting to criminal law. The thesis delves into the relationship between this punitive branch of the law and social networks, and, more precisely, measures the impact of these online services on the conditions of criminal liability. Far from turning criminal liability upside down, the features of social networks spur a renewal of this repressive mechanism. On the one hand, the contours of the offences need to be renewed in order to embrace the interactive and intrusive dimensions of social networks. As a result, many offenses have to be confronted with these new communication media, such as press offences, sexual offenses, offenses against consent or offenses against privacy or identity. On the other hand, the specific functioning of these online services calls for a renewal of the rules relating to the repression lato sensu. Regarding social networks users, their repressive regime needs to be adapted to take the interactive nature of these media into account. Thus, the rules of attribution and punishment of the offenses have to be adjusted. Regarding platform managers, the growing awareness of their active role in the circulation of contents calls for a deepening of their repressive regime, in order to force them to anticipate the occurrence of offenses risks
Maisongrande, Vincent. "Les circulations migratoires roumaines en Europe: Réseaux sociaux et inscription dans l'espace." Phd thesis, Université de Poitiers, 2008. http://tel.archives-ouvertes.fr/tel-00603335.
Full textGashti, Shahab. "Architecture de la découverte de services pour les réseaux de domicile communautaires." Paris 6, 2010. http://www.theses.fr/2010PA066038.
Full textBen, Chaabene Nour El Houda. "Détection d'utilisateurs violents et de menaces dans les réseaux sociaux." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAS001.
Full textOnline social networks are an integral part of people's daily social activity. They provide platforms to connect people from all over the world and share their interests. Recent statistics indicate that 56% of the world's population use these social media. However, these network services have also had many negative impacts and the existence of phenomena of aggression and intimidation in these spaces is inevitable and must therefore be addressed. Exploring the complex structure of social networks to detect violent behavior and threats is a challenge for data mining, machine learning, and artificial intelligence. In this thesis work, we aim to propose new approaches for the detection of violent behavior in social networks. Our approaches attempt to resolve this problem for several practical reasons. First, different people have different ways of expressing the same violent behavior. It is desirable to design an approach that works for everyone because of the variety of behaviors and the various ways in which they are expressed. Second, the approaches must have a way to detect potential unseen abnormal behaviors and automatically add them to the training set. Third, the multimodality and multidimensionality of the data available on social networking sites must be taken into account for the development of data mining solutions that will be able to extract relevant information useful for the detection of violent behavior. Finally, approaches must consider the time-varying nature of networks to process new users and links and automatically update built models. In the light of this and to achieve the aforementioned objectives, the main contributions of this thesis are as follows: - The first contribution proposes a model for detecting violent behavior on Twitter. This model supports the dynamic nature of the network and is capable of extracting and analyzing heterogeneous data. - The second contribution introduces an approach for detecting atypical behaviors on a multidimensional network. This approach is based on the exploration and analysis of the relationships between the individuals present on this multidimensional social structure. - The third contribution presents a framework for identifying abnormal people. This intelligent framework is based on the exploitation of a multidimensional model which takes as input multimodal data coming from several sources, capable of automatically enriching the learning set by the violent behaviors detected and considers the dynamicity of the data in order to detect new violent behaviors that appear on the network. This thesis describes achievements combining data mining techniques with new machine learning techniques. To prove the performance of our experimental results, we sums based on real data taken from three popular social networks
Maigrot, Cédric. "Détection de fausses informations dans les réseaux sociaux." Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S085.
Full textFalse information are multiplying and are spreading quickly on social networks. In this thesis, we analyze the publications from a multimodal point of view between the text and the associated image. Several studies were conducted during this thesis. The first compares several types of media present on social networks and aims to discriminate them automatically. The second one allows the detection and the localization of modifications in an image thanks to the comparison with an old version of this image. Finally, we focused on merged knowledge based on the predictions of other research teams to create a single system
Jacob, Yann. "Classification dans les graphes hétérogènes et multi-relationnels avec contenu : Application aux réseaux sociaux." Paris 6, 2013. http://www.theses.fr/2013PA066494.
Full textThe emergence of the Web 2. 0 has seen the apparition of a large quantity of data that can easily be represented as complex graphs. There is many tasks of information analysis, prediction and retrieval on these data, while the state-of-the-art models are not adapted. In this thesis, we consider the task of node classification/labeling in complex partially labeled content networks. The applications for this task are for instance video/photo annotation in the Web 2. 0 websites, web spam detection or user labeling in social networks. The originality of our work is that we focus on two types of complex networks rarely considered in existing works: \textbf{multi-relationnal graphs} composed of multiple relation types and \textbf{heterogeneous networks} composed of multiple node types then of multiple joint labeling problems. First, we proposed two new algorithms for multi-relationnal graph labeling. These algorithms learn to weight the different relation types in the label propagation process according to their usefullness for the labeling task. They learn to combine the different relation types in an optimal manner for classification, while using the node content information. Then, we proposed an algorithm for heterogeneous graph labeling. Here, a specific problem is that each type of node has it own label set: for instance visual tags for a photo and groups for an user, then we must solve these different classification problems simultaneously using the graph structure. Our algorithm is based on the usage of a latent representation common to all node types allowing to process the different node types in an uniformized manner. Our experimental results show that this model is able to take in account the correlations between labels of different node types
Maniu, Silviu. "Gestion des données dans les réseaux sociaux." Thesis, Paris, ENST, 2012. http://www.theses.fr/2012ENST0053/document.
Full textWe address in this thesis some of the issues raised by the emergence of social applications on the Web, focusing on two important directions: efficient social search inonline applications and the inference of signed social links from interactions between users in collaborative Web applications. We start by considering social search in tagging (or bookmarking) applications. This problem requires a significant departure from existing, socially agnostic techniques. In a network-aware context, one can (and should) exploit the social links, which can indicate how users relate to the seeker and how much weight their tagging actions should have in the result build-up. We propose an algorithm that has the potential to scale to current applications, and validate it via extensive experiments. As social search applications can be thought of as part of a wider class of context-aware applications, we consider context-aware query optimization based on views, focusing on two important sub-problems. First, handling the possible differences in context between the various views and an input query leads to view results having uncertain scores, i.e., score ranges valid for the new context. As a consequence, current top-k algorithms are no longer directly applicable and need to be adapted to handle such uncertainty in object scores. Second, adapted view selection techniques are needed, which can leverage both the descriptions of queries and statistics over their results. Finally, we present an approach for inferring a signed network (a "web of trust")from user-generated content in Wikipedia. We investigate mechanisms by which relationships between Wikipedia contributors - in the form of signed directed links - can be inferred based their interactions. Our study sheds light into principles underlying a signed network that is captured by social interaction. We investigate whether this network over Wikipedia contributors represents indeed a plausible configuration of link signs, by studying its global and local network properties, and at an application level, by assessing its impact in the classification of Wikipedia articles.javascript:nouvelleZone('abstract');_ajtAbstract('abstract')
Ruspil, Thomas. "Le statut, l'identification et le rôle des e-leaders d'opinion dans les réseaux sociaux internet." Thesis, Toulouse 1, 2017. http://www.theses.fr/2017TOU10065.
Full textE-Opinion Leaders (e-OL) identification on internet social networks is a major issue for marketing managers. This thesis deals with the role, status and identification of these e-OL. Each one of these three aspects are subject to controversial debates in the literature. Three studies are conducted within this thesis. They provide complementary and crossed answers to these debates. Regarding the e-OL status, we offer a definition for the e-OL concept in the specific context of internet social networks within three main characteristics: expertise in the product category, the will to publish valuable contents for their contacts, and the will to develop their social capital. Then, for the e-OL identification, we develop a new and multidimensional measurement scale for this concept. This scale shows good external validity. We confront it with others e-LO measures inspired by traditional OL measures, but also with alternative identification methods as the Twitter profile indicators and the Klout score algorithm. Finally, we test four models and their variants in order to better understand the origin and mechanism of the main e-LO role: the e-influence. We especially show that e-OL has an impact on e-influence. We also show that confidence mediates the link between e-LO and e-influence. These results speak to the relevance of e-OL in a viral marketing perspective