Anne-Marije Vendeville (39) is sinds 2017 art director van NRC. Vorig jaar werd haar krant uitgeroepen tot European Newspaper of the Year. 'Het vertrouwen in collega's met een andere expertise moet gr...

Fernando Diaz-Diaz, Elena Candellone, Miguel A. Gonzalez-Casado, Emma Fraxanet, Antoine Vendeville, Irene Ferri, Andreia Sofia Teixeira Signed networks provide a principled framework for representing systems in which interactions are not merely present or absent but qualitatively distinct: friendly or antagonistic, supportive or conflicting, excitatory or inhibitory. This polarity reshapes how we think about structure and dynamics in complex systems: a negative tie is not simply a missing positive one but a constraint that generates tension, and possibly asymmetry. Across disciplines, from sociology to neuroscience and machine learning, signed networks provide a shared language to formalise duality, balance, and opposition as integral components of system behaviour. This review provides a comprehensive and foundational summary of signed network theory. It formalises the mathematical principles of signed graphs and surveys signed-network-specific measures, including signed degree distributions, clustering, centralities, motifs, and Laplacians. It revisits balance theory, tracing its cognitive and structural formulations and their connections to frustration. Structural aspects of signed networks are examined, analysing key topics such as null models, node embeddings, sign prediction, and community detection. Subsequent sections address dynamical processes on and of signed networks, such as opinion dynamics, contagion models, and data-driven approaches for studying evolving networks. Practical challenges in constructing, inferring and validating signed data from real-world systems are also highlighted, and we offer an overview of currently available datasets. We also address common pitfalls and challenges that arise when modelling or analysing signed data. Overall, this review integrates theoretical foundations, methodological approaches, and cross-domain examples, providing a structured entry point and a reference framework for researchers interested in the study of signed networks in complex systems. Read the full article at: arxiv.org

A fine-grained database of Twitter posts gathered during the 2017 French presidential election validates a popular network model of opinion dynamics.

ツバメのブローチをご紹介しますくちばしで運ぶのは、カッシアの聖リタの小さなメダイ聖リタの聖地　Vendevilleのサン・テュベール教会を訪れた際の記念...

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"Promouvoir plus largement l'affichage environnemental en France et à l'international", c’est ainsi qu’Hubert Vendeville, le dirigeant de...-Tourisme

Au sanctuaire de sainte Rita à Vendeville, au sud de l’agglomération de Lille dans le même diocèse, les cloches ne sonnent plus depuis 1984. Une nouvelle cloche de 315 kilos Lire la suite ...

Classée depuis six mois ville sanctuaire au même titre que Lourdes, la commune de la patronne des causes désespérées, située dans le Nord, a enregistré une hausse de 30 % de ses visiteurs. Elle espère désormais que la région financera la rénovation de son église.

A fine-grained database of Twitter posts gathered during the 2017 French presidential election validates a popular network model of opinion dynamics.