Search results for "social networks"
showing 10 items of 164 documents
Statistically validated networks in bipartite complex systems.
2011
Many complex systems present an intrinsic bipartite nature and are often described and modeled in terms of networks [1-5]. Examples include movies and actors [1, 2, 4], authors and scientific papers [6-9], email accounts and emails [10], plants and animals that pollinate them [11, 12]. Bipartite networks are often very heterogeneous in the number of relationships that the elements of one set establish with the elements of the other set. When one constructs a projected network with nodes from only one set, the system heterogeneity makes it very difficult to identify preferential links between the elements. Here we introduce an unsupervised method to statistically validate each link of the pr…
A Logical Key Hierarchy Based approach to preserve content privacy in Decentralized Online Social Networks
2020
Distributed Online Social Networks (DOSNs) have been proposed to shift the control over user data from a unique entity, the online social network provider, to the users of the DOSN themselves. In this paper we focus on the problem of preserving the privacy of the contents shared to large groups of users. In general, content privacy is enforced by encrypting the content, having only authorized parties being able to decrypt it. When efficiency has to be taken into account, new solutions have to be devised that: i) minimize the re-encryption of the contents published in a group when the composition of the group changes; and, ii) enable a fast distribution of the cryptographic keys to all the m…
Heterogeneous network games: Conflicting preferences
2013
Proceeding at: 2nd Annual UECE Lisbon Meeting: Game Theory and Applications, took place 2010, November, 4-6, in Lisbon (Portugal). The event Web site http://pascal.iseg.utl.pt/~uece/lisbonmeetings2010/ In many economic situations, a player pursues coordination or anti-coordination with her neighbors on a network, but she also has intrinsic preferences among the available options. We here introduce a model which allows to analyze this issue by means of a simple framework in which players endowed with an idiosyncratic identity interact on a social network through strategic complements or substitutes. We classify the possible types of Nash equilibria under complete information, finding two thr…
Using Topic Modeling Methods for Short-Text Data: A Comparative Analysis
2020
With the growth of online social network platforms and applications, large amounts of textual user-generated content are created daily in the form of comments, reviews, and short-text messages. As a result, users often find it challenging to discover useful information or more on the topic being discussed from such content. Machine learning and natural language processing algorithms are used to analyze the massive amount of textual social media data available online, including topic modeling techniques that have gained popularity in recent years. This paper investigates the topic modeling subject and its common application areas, methods, and tools. Also, we examine and compare five frequen…
Researchers' Age, Gender and Professional Status as Indicators of the Twitter Perception in Science Dissemination
2019
Resumen: El objetivo de este estudio es evaluar el grado de satisfacción e interés que presenta el personal de investigación de las universidades españolas por las redes sociales como Twitter. Para ello, se han examinado los datos obtenidos mediante una encuesta online a unos 600 investigadores proactivos de la divulgación científica de 20 universidades españolas (2016). Para el análisis de los datos, se utilizó el test de independencia de Kruskal-Wallis. Según los resultados, dos de cada tres (65.4%) investigadores percibieron beneficios después de haber realizado la comunicación de sus resultados de investigación y una gran mayoría (84.7%) no percibieron ningún perjuicio. En relación con …
Sociālo tīklu kā mārketinga instrumenta izmantošana
2015
Maģistra darba „Sociālo tīklu kā mārketinga instrumenta izmantošana” mērķis ir, pamatojoties uz sociālo tīklu mārketinga analīzi, uzņēmumu un sociālo tīklu lietotāju novērtējuma, izpētīt vai sociālie tīkli ietekmē patērētāju viedokļus un vai ar to palīdzību ir iespējams piesaistīt jaunus un lojālus klientus. Maģistra darbs sastāv no ievada, četrām nodaļām, secinājumiem un priekšlikumiem. Pirmajā nodaļā tika apskatīta teorētiskā bāze un sociālo tīklu pielietošana pasaulē un Latvijā. Otrajā nodaļā tika analizētas sociālo tīklu izmantošanas iespējas mārketingā. Trešajā nodaļā tika analizētas uzņēmumu lapas sociālajos tīklos. Ceturtajā nodaļā ir veikts uzņēmumu un sociālo tīklu lietotāju pētīju…
Sociālie tīkli kā produkta virzīšanas un pārdošanas rīks augstskolu izvēles kontekstā.
2019
Bakalaura darba tēma ir “Sociālie tīkli kā produkta virzīšanas un pārdošanas rīks augstskolu izvēles procesā”. Darba mērķis ir, balstoties uz teorijas atziņām par sociālajiem tīkliem un veiktās aptaujas rezultātiem, novērtēt sociālos tīklus kā mārketinga instrumentu un tā efektivitāti augstskolu izvēles veiksmīgai virzīšanai, atklāt nepilnības un sniegt priekšlikumus to novēršanai Darbs sastāv no 3 nodaļām. 1. nodaļā ir raksturoti sociālie tīkli mārketinga kontekstā kā virzīšanas instruments un tā teorētiskie aspekti. 2. nodaļā ir analizēti pieejamie statistikas dati par sociālo tīklu lietošanas tendencēm, kā arī par augstskolu jau esošajām mārketinga aktivitātēm sociālajos tīklos. Darba tr…
Discovering Homophily in Online Social Networks
2018
During the last ten years, Online Social Networks (OSNs) have increased their popularity by becoming part of the real life of users. Despite their tremendous widespread, OSNs have introduced several privacy issues as a consequence of the nature of the information involved in these services. Indeed, the huge amount of private information produced by users of current OSNs expose the users to a number of risks. The analysis of the users’ similarity in OSNs is attracting the attention of researchers because of its implications on privacy and social marketing. In particular, the homophily between users could be used to reveal important characteristics that users would like to keep hidden, hence …
Consentimiento de los menores de edad en las redes sociales: especial referencia Tiktok
2022
RESUMEN. El uso masificado de las redes sociales trae consigo una ingente cantidad de consecuencias jurídicas tanto en el ámbito del derecho de los contratos, como en materia de protección de datos, así como en el ámbito del derecho de los consumidores. Más de la mitad de la población mundial hace uso de este tipo de plataformas digitales y, en especial, un colectivo que merece una especial protección por parte de los legisladores: los menores de edad. Tras un análisis de la normativa aplicable a los menores de edad en las redes sociales se hace alusión, de una manera más tangible, al uso de la red social de TikTok por este colectivo. ABSTRACT. The massive use of social networks brings with…
Un luogo dell’immagine. Flickr e la visione collettiva on-line.
2008
Con questo apporto si intende effettuare un'analisi generale dei principali aspetti teorico-culturali aperti dalle nuove tecnologie di condivisione delle immagini. In particolare ci si concentra sulle modificazioni antropologiche che discendono da tale innovazione.