helios. project
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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, […]
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 […]
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 […]