Title
Utilizing Machine Learning and Social Network Analysis to Counter Disinformation on Online Social Networks
Abstract
The proliferation of disinformation and misleading content within online social networks (OSNs) has emerged as a pressing concern, posing detrimental effects at personal, societal, and national levels. The unchecked and swift dissemination of such content has fostered an environment conducive to the amplification of falsehoods, rumors, propaganda, and hoaxes, thereby significantly impacting economic, political, and public health landscapes in recent years. Tackling this multifaceted challenge necessitates a holistic, collaborative approach involving various stakeholders, including individuals, media entities, governmental bodies, technology firms, and researchers. This keynote seeks to shed light on the associated complexities and delve into the utilization of Machine Learning, and Social Network Analysis techniques in countering disinformation. Specifically, the keynote will center on two primary domains: Natural Language Processing (NLP) and Multimodal Deep Learning (DL) architectures. In the realm of NLP, emphasis will be placed on the facter-check architecture, a solution employing ensembles and deep learning rooted in Transformer technology. This framework showcases the effective integration of NLP and SNA methodologies in identifying misleading content and tracing its dissemination across OSNs. Conversely, the presentation will also spotlight novel deep learning models tailored for the analysis and fusion of multimodal information, encompassing images and textual information (comments, posts, metadata). Analyzing posts poses a formidable challenge due to the diverse modalities of information, including textual and visual components. Finally, the keynote will explore future trends and challenges associated with the detection and mitigation of misinformation, underscoring the ongoing efforts in combating this pervasive issue.
Biodata
David Camacho is Full Professor at Computer Systems Engineering Department of Universidad Politécnica de Madrid (UPM), he is the head of the Applied Intelligence and Data Analysis research group (AIDA: https://aida.etsisi.uam.es), the Director of the PhD program in Computer Science and Technologies of Smart Cities, and the Director of the Master program in Machine Learning and Big Data at UPM. He has published more than 300 journals, books, and conference papers (https://scholar.google.es/citations?hl=en&user=fpf6EDAAAAA). His research interests include Machine Learning (Clustering/Deep Learning), Computational Intelligence (Evolutionary Computation, Swarm Intelligence), Social Network Analysis, Fake News and Disinformation Analysis. He has participated/led more than 60 AI-based R&D projects (National and International: H2020, MCSA ITN-ETN, DG Justice, ISFP, NRF Korea), applied to real-world problems in areas as aeronautics, aerospace engineering, cybercrime/cyber intelligence, social networks applications, disinformation countering, or video games among others. He serves as Editor in Chief of Expert Systems from 2023 and sits on the Editorial Board of several journals including Information Fusion, Human-centric Computing and Information Sciences (HCIS), and Cognitive Computation, IEEE Transactions on Emerging Topics in Computational Intelligence (IEEE TETCI), among others. Contact at: David.Camacho@upm.es
Title
Multimodal Graph Generative AI and applications to biomedical domain
Abstract
Graph generative models are recently gaining significant interest in current application domains. They are commonly used to model social networks, knowledge graphs, molecules and proteins. In this talk we will present the potential of graph generative models and our recent relevant efforts in the biomedical domain. More specifically we present a novel architecture that generates medical records as graphs with privacy guarantees. We capitalize and modify the graph Variational autoencoders (VAEs) architecture. We train the generative model with the well known MIMIC medical database and achieve generated data that are very similar to the real ones yet provide privacy guarantees. We achieve there as well promising results with potential for future application in broader biomedical related tasks. Finally we present ongoing research directions for multi modal generative models involving graphs and applications to protein function text generation – the prot2text model.
Biodata
M. Vazirgiannis is a Distinguished Professor at Ecole Polytechnique in France. He has been intensively involved in data science and AI related research. His broad research area is in methods for data mining and machine/deep learning methods for diverse data types and applications (including graphs, text, time series). Recently he is working on i. GNNs and aspects including expressiveness, efficiency, generation ii. Pretrained models and resources for multilingual NLP and Biomedical applications. His research and industrial impact is spanning different domains such as web advertising, social networks, online gambling, insurance, legal text applications, aviation and maritime industry and the bio/medical domain. He also pioneered at the teaching/training level having introduced new machine/deep learning and AI courses for academic and executive training studies. Pr. Vazirgiannis has published more than 250 papers in international journals and proceedings of international conferences and his work is highly cited with his h-index 60 (Google scholar, as of March 2024). On the side of supervision he has supervised 30 completed PhD theses. Finally he has been able to attract significant funding for research from national and international sources, from research agencies and industrial partners (including Google, Airbus, Huawei, Deezer, BNP, LVMH). He lead(s) academic research chairs (DIGITEO 2013-15, ANR/HELAS 2020-26) and an industrial one (AXA, 2015-2018). He has received several awards and distinctions including i. Marie Curie Intra European Fellowship (2006-8) ii. "Rhino-Bird International Academic Expert Award" in recognition of his academic/professional work @ Tencent (2017), iii. best paper awards in international conferences (such as IJCAI 2018, CIKM2013). He has been invited to media interviews in France, USA and China and published popularized articles in French and Greek magazines/newspapers on Artificial Intelligence topics. More info at:
http://www.lix.polytechnique.fr/dascim/