05/2019. Invited Talk: Artificial Intelligence and Changes. Risks and Challenges. Department of Business Administration. University of Patras, Greece.
03/2018. 2 hs Tutorial: Belief Revision: 30 years. Institut de Recherche en Informatique de Toulouse (IRIT) at Université Paul Sabatier. March 2, 2018. Toulouse, France.
06/2017. Invited Talk: A Survey on Iterated Belief Change. IME. São Paulo University, Brazil.
09/2013. Invited Talk: O uso de Robots no Ensino de Inteligência Artificial. Computer Science Department. São Paulo University, Brazil.
08/2013. Invited Talk: Carlos Alchourrón- From AGM to DFT. Law Faculty, University of São Paulo.
08/2013. Invited Talk: Belief Revision: From 1985 to 2013. Computer Science Department. São Paulo University, Brazil.
11/2012. Invited Talk: AGM-25 years. Computer Science and Communication Lab, University of Luxembourg.
09/2012. Invited Talk: AGM-25 years. Faculdade de Ciências e Tecnologia. Universidade Nova de Lisboa.
09/2010. Invited Talk: Robots in Mathematics and Informatics Education. Faculté des Sciences. Université d'Artois, Lens - France.
05/2010. Invited Talk: Raciocínio e Dinâmica de Conhecimento em Robots. Conferência comemorativa do 58º aniversário da Força Aérea Portuguesa, UMa, Madeira. Portugal.
07/2008. 4 hs Tutorial: HighFive Collaborative Workshop. CMU Portugal, Madeira Summer Academy in HCI, CMU Portugal. Madeira. Portugal.
07/ 2008. 6 hs Tutorial: Tópicos avanzados en revisión de creencias. Universidad Nacional del Sur, Bahía Blanca, Argentina.
12/2006. Invited Talk: Robots for teaching Mathematics and Informatics. Mahasarakham University, Thailand.
09/2004. Invited Talk: From AGM to .... Sciences Faculty, University of Lisbon, Portugal.
08/2002. Invited Talk: Revisão de crenças, uma perspectiva histórica. IME. São Paulo University, Brazil.
07/2002. Invited Talk: From AGM to .... University of Birmingham, UK.
11/2001. Invited Talk: Belief Revision: An Introduction. Philosophy Department. University of Regensburg, Germany.
03/2001. Invited Talk: Belief Revision in Computer Science. Universidade Federal de Per¬nambuco, Brazil.
11/2000. Invited Talk: Credibility Limited Functions for Theory Change. IME. São Paulo University, Brazil.
03/2000. Invited Talk: On the notion of Credibility-Limited Functions. Philosophy Department. University of Regensburg, Germany.
07/ 1999. Invited Talk: Belief Revision in Computer Science. Escuela de Ciencias Informáticas, DC- Universidad de Buenos Aires. Argentina.
11/1997. Invited Talk: Semi-Contraction. Philosophy Department- Uppsala University, Sweden.
02/1997. Invited Talk: Applied Theory Change to Update Knowledge Bases. Philosophy Department- Uppsala University, Sweden.
10/ 1995. Invited Talk: Theory Change vs. Base Change. Sociedad Argentina de Analisis Filosófico. (SADAF), Argentina.
02/1995. 2 hs Tutorial: Belief Revision and Non-Monotonic Logics. Departamento de Ciências da Computação. Universidade Federal do Ceará, Brazil.
05/1994. Invited Talk: CWR: Contraction Without Recovery. Sociedad Argentina de Analisis Filosófico. (SADAF), Argentina.
07/ 1992. Invited Talk: Belief revision and knowledge base updat. Facultad de Ciencias. Universidad Católica de Nues¬tra Señora de la Asunción, Paraguay.
25/05/2020. Telejornal. RTP Madeira
26/09/2017. Interview: Olhar Indiscreto. RTP Madeira