{"id":5199,"date":"2026-02-05T12:46:49","date_gmt":"2026-02-05T12:46:49","guid":{"rendered":"https:\/\/cognitionconferences.com\/artificialintelligence\/?post_type=speaker&#038;p=5199"},"modified":"2026-02-05T12:53:12","modified_gmt":"2026-02-05T12:53:12","slug":"georgia-fargetta","status":"publish","type":"speaker","link":"https:\/\/cognitionconferences.com\/artificialintelligence\/speaker\/georgia-fargetta\/","title":{"rendered":"Georgia Fargetta"},"content":{"rendered":"<p>Global disasters are increasing in scale and frequency, disrupting livelihoods worldwide and intensifying food insecurity. Quantifying how shocks alter agricultural commodity shipping volumes and prices is essential to identify fragilities in trade networks and to design resilient mitigation strategies. This work presents a hybrid multi-agent reinforcement learning (MARL) approach for solving variational inequality (VI) problems that model multi-commodity trade network equilibria. While VIs provide a rigorous framework for capturing interacting supply\u2013demand decisions under network constraints, their solution via MARL is still limited by stability and convergence challenges. Building on an actor\u2013critic backbone, the proposed method integrates a gradient-based learning-rate scheduler, adaptive exploration decay, prioritized replay, and a dual reward that combines individual incentives with centralized feedback to steer agents toward equilibrium. Agents represent supply- and demand-side actors that learn decentralized strategies through repeated interaction in simulated markets. Experiments progressively increase environmental complexity, moving from stable conditions to time-varying prices and disruption scenarios such as route blockages. Results indicate faster, more reliable convergence than baseline MAPPO and MADDPG implementations, alongside robust adaptation under dynamic and adverse conditions. These findings support MARL as a practical tool to simulate economic behavior and optimize decentralized decision-making in complex, networked trade systems.<\/p>\n","protected":false},"featured_media":5200,"template":"","meta":{"_acf_changed":false},"schedule":[7],"speaker-category":[6],"class_list":["post-5199","speaker","type-speaker","status-publish","has-post-thumbnail","hentry","schedule-day-2","speaker-category-speakers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Georgia Fargetta | University of Catania | Italy<\/title>\n<meta name=\"description\" content=\"Georgia Fargetta is a researcher at the University of Catania (Italy), within the Department of Mathematics and Computer Science and the Image Processing Laboratory (IPLab). Her research focuses on artificial intelligence and computer vision, with interests in biometrics, multimodal learning, and open-set classification, addressing the analysis of complex and unconstrained visual data. She also works on optimization and game-theoretic models for complex systems, applied to sustainability and emergency management. She received the Young Women in Operational Research Award, and her doctoral thesis was recognized with a doctoral thesis award.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cognitionconferences.com\/artificialintelligence\/speaker\/georgia-fargetta\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Georgia Fargetta | University of Catania | Italy\" \/>\n<meta property=\"og:description\" content=\"Georgia Fargetta is a researcher at the University of Catania (Italy), within the Department of Mathematics and Computer Science and the Image Processing Laboratory (IPLab). Her research focuses on artificial intelligence and computer vision, with interests in biometrics, multimodal learning, and open-set classification, addressing the analysis of complex and unconstrained visual data. She also works on optimization and game-theoretic models for complex systems, applied to sustainability and emergency management. 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