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Preprint: “pygrank: A Python Package for Graph Node Ranking”

Emmanouil KrasanakisSymeon PapadopoulosIoannis Kompatsiaris Centre for Research & Technology Hellas, Information Technologies Institute Preprint Abstract: We introduce pygrank, an open-source Python package to define, run and evaluate node ranking algorithms. We provide object-oriented and extensively unit-tested algorithm components, such as graph filters, post-processors, measures, benchmarks and online tuning. Computations can be delegated to numpy, tensorflow […]

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Journal Paper: “p2pGNN: A Decentralized Graph Neural Network for Node Classification in Peer-to-Peer Networks”

Emmanouil KrasanakisSymeon PapadopoulosIoannis Kompatsiaris Centre for Research & Technology Hellas, Information Technologies Institute IEEE Access Abstract: In this work, we aim to classify nodes of unstructured peer-to-peer networks with communication uncertainty, such as users of decentralized social networks. Graph Neural Networks (GNNs) are known to improve the accuracy of simpler classifiers in centralized settings by […]

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Journal Paper: “Privacy-Aware Contact Sharing for Groups in P2P Networks”

Tommi Meskanen University of Helsinki Jarkko Kuusijärvi VTT Technical Research Centre of Finland Ltd Valtteri NiemiUniversity of Helsinki International Journal of Embedded and Real-Time Communication Systems (IJERTCS)  Abstract: The need for peer-to-peer (p2p) communications is obvious because current centralized solutions are capturing and storing too much information from individuals communicating with each other. HELIOS platform […]

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Journal Paper: “Researching Displaced Persons During COVID-19: Catering for Users’ Specific Needs in Media Accessibility Projects”

María Jiménez-AndrésUniversitat Autònoma de Barcelona Nourhan AlemamSouthern New Hampshire University Journal of Audiovisual TranslationVol. 4 No. 2 (2021): Special issue: Testing Times Abstract: Coronavirus disease 2019 (COVID-19) has created additional barriers to human interactions. For those conducting research with displaced persons, the barriers posed by COVID-19 add up to the existing linguistic, cultural, geographical, and […]

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Journal Paper: “Respecting the GDPR in Online Interviewed Focus Groups”

Carolina GobernaUniversität Passau Journal of Audiovisual TranslationVol. 4 No. 2 (2021): Special issue: Testing Times Abstract: Since March 2020the Coronavirus has limited personal encounters due to social distancing measures. Thus, many data collection techniques relying on face-to-face interaction, like interviews or Focus Groups(FG), are now being practiced in online environments. Such change requires the implementation […]

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Journal Paper: “Accessibility in Online User-Testing”

Estella OncincsUniversitat Autònoma de Barcelona Journal of Audiovisual TranslationVol. 4 No. 2 (2021): Special issue: Testing Times Abstract: The current COVID-19 crisis has revealed the crucial role of online communication technologies in providing unique opportunities to carry out qualitative research in online user-based testing. The ability to provide a shared common space for participants living […]

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Journal Paper: “Testing times: introduction”

Pilar OreroUniversitat Autònoma de Barcelona David Hernández FalagánUniversitat Politècnica de Catalunya Journal of Audiovisual TranslationVol. 4 No. 2 (2021): Special issue: Testing Times Abstract: That COVID-19 touched all walks of life is an understatement. With the risk of sounding frivolous, compared with other impacts, COVID-19 had direct implications in research, and particularly in funded research […]

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Preprint: “pygrank: A Python Package for Graphe Node Ranking”

Emmanouil Krasanakis Symeon Papadopoulos Ioannis KompatsiarisCentre for Research and Technology—Hellas Andreas SymeonidisAristotle University of Thessaloniki Author preprint  Abstract: We introduce pygrank, an open-source Python package to define, run and evaluate node ranking algorithms. We provide object-oriented and extensively unit-tested algorithm components, such as graph filters, post-processors, measures, benchmarks and online tuning. Computations can be delegated to numpy, […]

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Conference Paper: “Multi-party Private Set Operations with an External Decider”

Sara Ramezanian, Tommi Meskanen, Valtteri NiemiUniversity of Helsinki IFIP Annual Conference on Data and Applications Security and PrivacyDBSec 2021: Data and Applications Security and Privacy XXXV pp 117-135 Abstract: A Private Set Operation (PSO) protocol involves at least two parties with their private input sets. The goal of the protocol is to learn the output of a […]

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Conference Paper: “Towards a Privacy Respecting Image-based User Profiling Component”

Awarded as Best Paper Panagiotis Galopoulos, Chryssanthi Iakovidou, Vasiliki Gkatziaki, Symeon Papadopoulos, Yiannis KompatsiarisCERTH-ITI, Thessaloniki, Greece 2021 International Conference on Content-Based Multimedia Indexing (CBMI) Abstract: This paper explores the development of a framework for content-aware user profiling, studying how image producers and consumers can be better understood and consequently better served through services such as matchmaking and friend […]