2017

**(Invited)***"Von High-Tech im Alltag zum Alltag dank High-Tech"*at MINT-Fachtag 2017 (STEM advanced training), Universität Bremen, Germany, 08. March 2017, 2017**(Invited)***"SHIP – A Logic-Based Language and Tool to Program Smart Environments"*at Luxemburg Institute of Science and Technology (LIST), Belval, Luxemburg, 25.01.2017, 2017**(Invited)***"Intelligent Assistance Research in the Bremen Ambient Assisted Living Lab"*at Luxemburg Institute of Science and Technology (LIST), Belval, Luxemburg, 25.01.2017, 2017

**(Invited)***"Prevention, added value and independence through assistive technologies "*at ICT & the 4th Industry Revolution, Seoul, South-Korea, 02.11.2016, 2016**(Invited)***"Intelligent umgeben: Von High-Tech im Alltag zum Alltag dank High-Tech"*at GeWiNet Tagung "Altersgerechter Assistenzsysteme in der Wohnungswirtschaft der Metropolregion Nordwest", Varusschlacht-Kalkriese, Germany, 19.10.2016, 2016**(Invited)***"Intelligente wissensbasierte Algorithmen für individualisiertes Marketing"*at MarkeThing, Alte Teppichfabrik Berlin, Germany, 28.9.2016, 2016**(Invited)***"Intelligent umgeben: Von High-Tech im Alltag zum Alltag dank High-Tech"*at talKIT - Das Technologieforum - Living in an Automated World - Robotics and autonomous systems, KIT, Karslruhe, Germany, 10-12. Mai 2016, 2016**(Invited)***"Intelligent umgeben: Von High-Tech im Alltag zum Alltag dank High-Tech"*at IT2KO - IT- & Wirtschaftsforum Rhein-Mosel-Halle, Koblenz, Koblenz, Germany, 29-30. April 2016, 2016**(Invited)***"Von High-Tech im Alltag zum Alltag dank High-Tech"*at MINT-Fachtag 2016 (STEM advanced training), Universität Bremen, Germany, 2. March 2016, 2016

**(Invited)***"Entwicklung intelligenter Technologien zur Erhaltung der Selbständigkeit und Lebensqualität älterer Menschen "*at Deutsch-Chinesisches Altenpflege-Symposium , Bürgerschaft, Bremen, Germany, 5./6.2.2015, 2015

**(Invited)***"BAALL - Bremen Ambient Assisted Living Lab"*at 1st International Workshop on Enhanced Living EnvironMENTs, Würzburg, Germany, 24. September 2014, 2014**(Invited)***"ASSAM: Assistants pour mobilité sûre"*at Collque VITE 2014, vivre et se mouvoir dans la ville grâce aux nouvelles technologies , Paris, France, 5. February 2014, 2014

**(Invited)***"Assistants for Safe Mobility – ASSAM compensating for declining physical and cognitive capabilities"*at Raising the awareness of AAL JP activities and AAL JP projects among European regions, Vienna, Austria, 4. November 2013, 2013

**(Invited)***"Semantic Difference Analysis and Change Impact Analysis for interrelated Documents, Specifications and Programs: Methods, Tools, and Problems"*at , ONERA, Toulouse, France, 10-13. January 2011, 2011

*"Semantics-Based Change Impact Analysis for Heterogeneous Collections of Documents"*at 19th Clam — Inka — OMRS Workshop (CIAO 2010), RISC, Schloss Hagenberg, Austria, 3-5 August 2010, 2010*"A Tactic Language for Declarative Proofs "*at 19th Clam — Inka — OMRS Workshop (CIAO 2010), RISC, Schloss Hagenberg, Austria, 3-5 August 2010, 2010*"Proof Search Formalisms and Grammar Formalisms in OMEGA"*at Workshop on Mathematically Intelligent Proof Search (MIPS 2010), CNAM, Paris, France, 2010*"Recent Developments in Omega's Proof Search Programming Language"*at Programming Languages for Mechanized Mathematics Systems, CNAM, Paris, France, 2010*"Declarative Specification Tactics as a Lightweight-Formalism for Design Patterns for Formal Specifications"*at 20th Workshop on Algebraic Development Techniques (WADT-2010), Schloss Etelseon, Langwedel, Germany, 1-4. July 2010, 2010

**(Invited)***"Semantics-based Authoring Tools for Mathematical Documents"*at Seminar on Formal Mathematics, Bonn, Germany, 31 October, 2008 (Slides)

**(Invited)***"Das Beweisassistenzsystem OMEGA"*at Ringvorlesung der Mathematik, Saarbruecken, Germany, 22 Juni, 2007 (Slides)**(Invited)***"Integrating the Text-Editor TeXmacs and the Proof Assistance System OMEGA using PLATO"*at LORIA, Nancy, France, 2007 (Slides)

*"Integrating the Text-Editor TeXmacs and the Proof Assistance System OMEGA using PLATO"*at CHIT/CHAT 06 (Small Types Workshop), Nijmegen, Netherlands, 21-22 December, 2006 (Slides)*"PLATO: A Mediator between Text-Editors and Proof Assistance Systems"*at 7th Workshop on User Interfaces for Theorem Provers (UITP'06), Seattle, WA, USA, 21st August, 2006 (Slides)*"The MathServe Framework for Semantic Reasoning Web Services"*at 3rd International Joint Conference on Automated Reasoning (IJCAR'06), Seattle, WA, USA, 17-20 August , 2006 (Slides)*"A Formal Correspondence between OMDoc with Alternative Proofs and the LambdaBarMuMuTilde-Calculus"*at 5th International Conference on Mathematical Knowledge Management (MKM 2006), Wokingham, UK, 11-12th August, 2006 (Slides)**(Invited)***"The New Proof Assistant OMEGA: Developments and Applications "*at CISA Seminar, University of Edinburgh, Edinburgh, 20th July, 2006 (Slides)*"The New Proof Assistant OMEGA: Developments and Applications "*at Scottish Theorem Proving Meeting, University of Glasgow, Glasgow, June 6th, 2006 (Slides)*"Automated reasoning in large structured theories"*at Workshop CIAO'06, Braunshausen, Germany, April 6-7, 2006 (Slides)*"Proof Development and Maintenance (after a brief survey of the new OMEGA System) "*at SFB-378 ``C-Tag'', Saarbruecken, Germany, March 17, 2006 (Slides)

*"The Deep Inferential Aspects of the CORE Calculus"*at ICCL Autumn Workshop - Deep Inference and Proof Theory, Dresden, Germany, December 14-15, 2005 (Slides)*"Architecture of the new OMEGA system + The CORE Calculus"*at Theorema-Ultra-Omega'05, Saarland university, Saarbrücken, Germany, November 14-15, 2005 (Slides)*"On the Dynamic Increase of Multiplicities in Matrix Proof Methods for Classical Higher-Order Logic"*at 3rd Nancy-Saarbrücken Workshop on Logic, Deduction, LORIA, Nancy, France, October 13-14, 2005 (Slides)*"On the Dynamic Increase of Multiplicities in Matrix Proof Methods for Classical Higher-Order Logic"*at Tableaux 2005, Koblenz, Germany, September 14-17, 2005 (Slides)*"The CORE Calculus"*at 20th International Conference on Automated Deduction, Tallinn, Estonia, July 22-27, 2005 (Slides)*" Generic Modular Data Structure for Proof Attempts Alternating on Ideas and Granularity"*at Fourth International Conference on Mathematical Knowledge Management (MKM'05), International University Bremen, Germany, July 15-17, 2005 (Slides)*"Representing Proof-Planning in the Rho-Calculus"*at Second Workshop on the Rho-Calculus, LIX-Ecole polytechnique, Palaiseau, France, May 30, 2005 (Slides)*"Integrating Proof Assistants as Reasoning and Verification Tools into a Scientific WYSIWIG Editor"*at Workshop on User Interfaces for Theorem Provers (UITP 2005), Edinburgh, Scotland, April 9, 2005 (Slides)*"Formalising and Analysing Textbook Proofs: The Problem of Under-Specification and Granularity"*at CIAO'05 Workshop, Nottingham, UK, April 4-6, 2005 (Slides)**(Invited)***"Three Approaches for Guiding the Cooperation of Mathematical Reasoning Systems: Proof Planning, Agent-based Reasoning, and Automated Composition of Reasoning Web Services"*at QSL day about Integration of deductive tools, LORIA, Nancy, France, February 10, 2005 (Slides)*"Organisation of Workshops between Nancy & Saarbrücken -- Experiences & Suggestions"*at Kick-Off Meeting INTERREG Project III C ``Recherche sans Frontières/Forschen ohne Grenzen'', Saarland university, Saarbrücken, Germany, January 18, 2005 (Slides)

*"The CORE Calculus for Contextual Reasoning"*at Theoretical Computer Science Seminars, LORIA, Nancy, France, February 9, 2004

*"Hierarchical Contextual Reasoning"*at Doctoral Thesis Defense, Saarland university, Saarbrücken, Germany, December 19, 2003 (Slides)**(Invited)***"Omega: From Proof-Planning towards Mathematical Knowledge Management"*at Mathematical Knowledge Management Symposium, Heriott-Watt University, Edinburgh, Scotland, November 25-29, 2003 (Slides)**(Invited)***"Formal Software Development in MAYA"*at , Labri, Univ. Bordeaux, France, November 13, 2003 (Slides)*"Disproving False Conjectures"*at LPAR 2003, Almaty, Kasachstan, September 22-26, 2003 (Slides)**(Invited)***"Towards Distributed Mathematical Knowledge Management using MAYA"*at MOWGLI-Project Meeting, INRIA, Sophia-Antipolis, France, September 15, 2003 (Slides)*"Hierarchical Contextual Reasoning"*at Workshop Theorema-Omega'03, RISC, Hagenberg Castle, Austria, May 24-26, 2003 (Slides)*"Management of Change in MAYA"*at Workshop ``Mathematics on the Semantic Web'', Eindhoven, The Netherlands, May 12-14, 2003 (Slides)

*"Maintenance of formal Software Development by Stratified Verification"*at LPAR 2002, Tbilissi, Georgia, Ocotober 14-18, 2002 (Slides)*"Integrating HOL-CASL into the development graph manager MAYA"*at FROCOS 2002, Santa Margherita Ligure, Italy, April, 2002 (Slides)*"Intuitive & Contextual Reasoning or Towards supporting theorem proving on the assertion level"*at CIAO 2002, Edinburgh, Scotland, April, 2002 (Slides)

*"Intuitive & Contextual Reasoning"*at AG Siekmann internal group seminar, Saarland university, Saarbrücken, Germany, December, 2001 (Slides)*"The INKA Development Graph: Bridging the gap between Specifications and Theorem provers"*at Deduktionstreffen'01, Karlsruhe, Germany, 2001 (Slides)*"A Proof Planning Framework with explicit Abstractions based on Indexed Formulas"*at 4th workshop on strategies in automated deduction (STRATEGIES'01), Siena, Italy, June, 2001 (Slides)*"A Proof Planning Framework with explicit Abstractions based on Indexed Formulas"*at CIAO 2001, Genova, Italy, 2001 (Slides)

*"Towards a Reasoning Framework"*at Theoretical Computer Science Seminar, University of Birmingham, England, November, 2000 (Slides)*"Supporting Evolutionary Formal Software Development"*at CIAO 2000, Dagstuhl, Germany, 2000 (Slides)*"The CASL - INKA Interface"*at CoFI-tools group meeting at ETAPS 2000, Berlin, Germany, April, 2000 (Slides)

*"INKA 5.0"*at CIAO 1999, Edinburgh, Scottland, 1999 (Slides)

*"Clark Glymour 'Artificial Intelligence is Philosophy' in J.H. Fetzer: Aspects of AI, 1998"*at AGS Group Seminar "Philosophical Foundations of AI", Dagstuhl, Germany, 1998*"Different talks about selected topics in Machine Learning"*at AGS Group Seminar "Machine Learning", Dagstuhl, Germany, 1998*"Logic as a General Framework for Planning"*at Workshop ClamInka 1998, Edinburgh, Scotland, 1998

*"Decision Theory"*at AGS Group Seminar about "Decision Theory", Dagstuhl, Germany, 1997 (Slides)*"Using Abstractions to Equalize Terms"*at Workshop ClamInka 1997, Genova, Italy, 1997 (Slides)

*"Using Abstractions to Equalize Terms"*at Workshop ClamInka 1996, Edinburgh, Scotland, 1996 (Slides)