Journal paper published on Elsevier: Krasanakis, E., Schinas, E., Papadopoulos, S., Kompatsiaris, Y., & Symeonidis, A. (2019). Boosted seed oversampling for local community ranking. Information Processing & Management, 102053 – https://doi.org/10.1016/j.ipm.2019.06.002
Local community detection is an emerging topic in network analysis that aims to detect well-connected communities encompassing sets of priory known seed nodes. In this work, we explore the similar problem of ranking network nodes based on their relevance to the communities characterized by seed nodes. However, seed nodes may not be central enough or sufficiently many to produce high quality ranks. To solve this problem, we introduce a methodology we call seed oversampling, which first runs a node ranking algorithm to discover more nodes that belong to the community and then reruns the same ranking algorithm for the new seed nodes. We formally discuss why this process improves the quality of calculated community ranks if the original set of seed nodes is small and introduce a boosting scheme that iteratively repeats seed oversampling to further improve rank quality when certain ranking algorithm properties are met. Finally, we demonstrate the effectiveness of our methods in improving community relevance ranks given only a few random seed nodes of real-world network communities. In our experiments, boosted and simple seed oversampling yielded better rank quality than the previous neighborhood inflation heuristic, which adds the neighborhoods of original seed nodes to seeds.Read More
The envision of a Next Generation Internet focused on people is the main topic of the new generation of Decentralized Online Social Networks, which considers the main characteristics of the previous generations.
The authors Barbara Guidi and Andrea Michienzi from Universitá di Pisa (UNIPI), and Kristina Kapanova and Kevin Koidl from Trinity College Dublin (TCD), present a new idea to model a multi-layer P2P Social Overlay which considers different actors and relationships to be included in smart environments. It is organized in layers, where one layer represents a specific social context of the peer it models.
The paper provides a formal definition of the Heterogeneous Social Network and we show how it works in a general scenario.
The paper will be presented at the event GOODTECHS 2019 – 5th International Conference on Smart Objects and Technologies for Social Good, which will take place in from the 25th to the 27th of September in Valencia, Spain.Read More
The project aims at developing a decentralized social media platform guaranteeing trust and privacy to all users while allowing developers to create easy-to-apply social media functionality by reducing costs and development complexity
April 15, 2019. HELIOS is a 3-year Research and Innovation Action (RIA) project funded by the European Commission as part of its H2020 Programme, targeting the Topic “Future Hyper-Connected Sociality” and working on the development of a decentralized social media platform, initially available for Android, that will offer several functionalities and address the dynamic nature of human communication and interactions in three dimensions: contextual, spatial and temporal.
With the ambition to become a disruptive force in the European Social Media landscape, HELIOS aspire to lay the foundation for a new social network vision grounded on transparency and verification integrating blockchain-enabled network architecture to support the ad-hoc creation and management of social graphs within the context and proximity of users, provide all necessary means and features to ensure the highest level of trust and control into the platform –including novel decentralization, content creation and sharing-, allow new ways to control the monetization of users’ data, and ensure the highest level of privacy in line with all the necessary ethical and legal requirements.
Currently, Social Media and Networking platforms are the main channels for people to share information and experiences in real-time, but some of the online applications fail to address the complexity of social structures in which users’ change roles constantly from one network to other in several independent but interconnected context. Each Social Media fulfils a single need, remarkably well, but only see the social graphs as a content distribution channel instead of a mean to express and empower meaningful relationships easily.
On the other hand, existing Social Media Networks give users the impression that they are in full control of their data. However, are the owners’ companies which have the sole authority over a person’s information, and people without thinking twice sign and agree to privacy policies that give these companies the power to use users’ data in any way they want, and even for commercialization.
It’s clear that the current monopoly is a detriment to personal privacy and lack of trust that has harmful implications for users and their personal information. Consequently, HELIOS envisions a successful decentralization setting that provides the users control of three aspects: privacy, ownership, and sharing of content – all of which are stripped away when using any of the mainstream platforms.
In addition, the project will overcome the closed ecosystem stigma and will re-define the term “Social Media Platform” by creating a foundation for cooperation on social networking services with openness, flexibility, versatility, effectiveness and scalability, that follows the concepts of Contextual Integrity where users will be able to share information based on their context or sphere of life (e.g. friends, work, studies, etc) the same way they do in the physical world.
The pillars of design and implementation strategy of HELIOS include:
The project has a consortium, coordinated by VTT, composed by 15 partners from several EU-Member States and with different areas of expertise to address all the development of the platform, following novel concepts for social graph creation and management, adding trust and transparency to enrich the value of users’, that will be tested on different use cases along the life of the project. The partners are VTT (Finland), Atos (Spain), Centre for Research and Technology Hellas (Greece), Grassroots Arts and Research (Germany), LINKS Foundation (Italy), Nagoon AB (Sweden), Swiss TXT (Switzerland), Trinity College Dublin (Ireland), Università di Pisa (Italy), Universitat Autònoma de Barcelona (Spain), Universitat Politècnica de València (Spain), Universitat Passau (Germany), University of Helsinki (Finland), Worldline Iberia (Spain), and Escola Massana (Spain).
For more information visit: www.helios-h2020.eu
HELIOS is an EU-funded project under the H2020 Programme with the Grant Agreement Nº 825585, working on the development of a Context-aware Distributed and Descentralised Social Network Platform introducing novel concepts for social graph creation and management, which are grounded in trust and transparency.
For further information about the project please contact HELIOS Project Coordinator, Ville Ollikainen, VTT: email@example.com, and for any media enquiries please contact HELIOS Communication Manager, Ana María Morales, Atos Spain: firstname.lastname@example.orgRead More