Dr.-Ing. Robert Porzel

• Dialog Systems: context-adaptive natural language understanding and generation systems
• Knowledge Representation: grammars and ontologies
• Evaluation: usability and performance testing

Throughout his studies Robert Porzel earned degrees in general linguistics, computational linguistics and computer science. Previous to his current work he worked in the interdisciplinary collaborative research center "Language and Situation" (SFB 245) and the special research program "Language Production" (SPP 1022) funded by the German Research Foundation (DFG). Thereafter, he worked at the European Media Laboratory (EML) on several natural language processing projects, i.e. DeepMap, Embassi, SmartKom and SmartWeb, which were funded by the Klaus Tschira Foundation (KTS) and the German Ministry for Education and Research (BmBF). In between he was a guest researcher at the University of California, Berkeley working on a formalization of embodied construction grammar in the EDU project. After moving to the University of Bremen, Robert Porzel started work on contextual computing for autonomous collaborative systems in the DFG-funded special research program "Autonmous Logistic Processes" (SFB 637). He initiated and chaired the biannual ScaNaLU workshop series on scalable natural language understanding systems (2002, 2004 and 2006) and was a member of the steering board of the Interdisciplinary College (IK) - an international spring school on cognitive science, neurosciences and AI - which he chaired in 2010 together with Natalie Sebanz and Manfred Spitzer. His current position is that of "Reader in Digital Media" at the University of Bremen and he researches in the collaborative research center "Everyday Activity Science and Engineering" (SFB 1320) on knowledge models for cognitive robotics.

• SFB EASE (DFG, 2017-2021)
• MUHAI (EU FET-Open 2020-2024)
• KI-SIGS (BMWK 2020-2024)
• Graduiertenkolleg Empowering Digital Media (KTS, 2017-2023)

Monographs and Books

• Robert Porzel, Contextual Computing: Models and Applications. Cognitive Technologies, Springer Verlag, Heidelberg, Germany, 2010.
• Robert Porzel, Contextual Computing for Natural Language Processing. Dissertation, University of Bremen, 2010.

Contributions to Collections

• Robert Porzel, Mihai Pomarlan, Laura Spillner, Johanna Rockstroh and John A. Bateman. Narrativising Events. In  Ivana Marenzi, Simon Gottschalk, Eric Müller-Budack, Marko Tadi?, Jane Winters (eds.) Event Analytics across Languages and Communities. Springer Nature.
  2024.
• Be?ler, D., Porzel, R., Pomarlan, M., Beetz, M. Foundational Models for Manipulation Activity Parsing. In: Jung, T., tom Dieck, M.C., Correia Loureiro, S.M. (eds) Extended Reality and Metaverse. XR 2022. Springer Proceedings in Business and Economics. Springer, Cham. 2023.
• D?ring, Tanja, Porzel, Robert and Malaka, Rainer. Human-Computer Interaction with Novel and Advanced Materials: Technology and Applications, Chapter 26, 2017.
• Patrick Klein, Stefan Wellsandt, Klaus-Dieter Thoben, Susanne Putze, Robert Porzel, Rainer Malaka, Manuel Hahn, Axel Herrmann, Klaus Burkart, Hans-Werner Zoch, Munip Dalgic and Andre Irretier. Forschungsdatenmanagement mit InfoSys: Ein Ansatz zum Teilen von Forschungsdaten in den Materialwissenschaften. In Fortschritte in der Werksoffprüfung für Forschung und Praxis. H. Frenz and J.B. Langer (eds.). Deutscher Verband für Materialforschung und -prüfung, 2017.
• Tobias Warden, Robert Porzel, Jan D. Gehrke, Hagen Langer, Otthein Herzog, and Rainer Malaka, Knowledge Management for Agent-based Control under Temporal Bounds, In Hülsmann, M., Scholz-Reiter, B., Windt, K. (eds) Limitations of Autonomous Cooperation and Control in Logistics, Springer, Berlin, 2011.
• Robert Porzel, Iryna Gurevych, Rainer Malaka,In Context: Integrating Domain- and Situation-specific Knowledge. In: SmartKom - Foundations of Multimodal Dialogue Systems. Wolfgang Wahlster (eds.). pp. 269-284, Springer Verlag, Heidelberg, Germany, 2006.
• Iryna Gurevych, Robert Porzel and Rainer Malaka, Modeling Domain Knowledge: Know-How and Know-What. In: SmartKom - Foundations of Multimodal Dialogue Systems. W. Wahlster (eds.). pp. 71-84, Springer Verlag, Heidelberg, Germany, 2006.
• Iryna Gurevych and Robert Porzel, Empirical Studies for Intuitive Interaction. In: SmartKom - Foundations of Multimodal Dialogue Systems. Wolfgang Wahlster (eds.). pp. 603-615, Springer Verlag, Heidelberg, Germany, 2006.
• Hidir Aras, Vasu Chandrasekhara, Sven Krueger, Rainer Malaka and Robert Porzel, Intelligent Integration of External Data and Services into SmartKom. In: SmartKom - Foundations of Multimodal Dialogue Systems. Wolfgang Wahlster (eds.). pp. 363-379, Springer Verlag, Heidelberg, Germany, 2006.
• David Gelbart, John Bryant, Andreas Stolcke, Robert Porzel, Manja Baudis and Nelson Morgan, SmartKom-English: From Robust Recognition to Felicitous Interaction. In: SmartKom - Foundations of Multimodal Dialogue Systems. Wolfgang Wahlster (eds.). pp. 453-470, Springer Verlag, Heidelberg, Germany, 2006.
• Rainer Malaka, Jochen Haeussler, Hidir Aras, Matthias Merdes, Dennis Pfisterer, Matthias Joest, and Robert Porzel,SmartKom-Mobile: Intelligent Interaction with a Mobile System. In: SmartKom - Foundations of Multimodal Dialogue Systems. Wolfgang Wahlster (eds.). pp. 505-522, Springer Verlag, Heidelberg, Germany, 2006.
• Robert Porzel and Rainer Malaka, A Task-Based Framework for Ontology Learning, Population and Evaluation. In: Ontology Learning from Text: Methods, Evaluation and Applications. P. Buitelaar, P. Cimiano and B. Magnini (eds.) IOS Press, 2005.
• Porzel, Robert and Strube, Michael, Towards Context-dependent Natural Language Processing. In Manfred Klenner, Henriette Visser (eds.) Computational Linguistics for the New Millennium: Divergence or Synergy: Proceedings of the International Symposium Held at the Ruprecht-Karls-Universitat Heidelberg, 21-22 July 2000 Festschrift in Honour of Peter Hellwig, Peter Lang Academic Publishers, 2002.
• Robert Porzel, Ralf Meyer-Klabunde and Martin Jansche,Generating Spatial Descriptions from a Cognitive Point of View. In Coventry, K. R. and Olivier, P. (eds). Spatial Language. Cognitive and Computational Perspectives. Kluwer Academic Publishers. Dordrecht, 2002.
• Robert Porzel, Volker Coors, Christian Kray, Zu komplexen Diensten mit einfachen natürlichsprachlichen Interaktionen. In U. Stielke (ed.) Digital Storytelling. Fraunhofer IRB Verlag, Stuttgart, 2000.
• Ralf Klabunde, Daniel Glatz, and Robert Porzel,An Anatomy of a Spatial Description. In Meyer-Klabunde & von Stutterheim (eds.), Representations and Processes in Language Production. Deutscher Universit?ts Verlag, Wiesbaden, 1999.

Journals

• Pomarlan, M., Hedblom, M. M. and Porzel, R. Curiously exploring affordance spaces of a pouring task. Expert Systems, e13213, 2022.
• Sebastian H?ffner, Robert Porzel, Maria M. Hedblom, Mihai Pomarlan, Vanja Sophie Cangalovic, Johannes Pfau, John A. Bateman and Rainer Malaka. Deep Understanding of Everyday Activity Commands for Household Robots. Semantic Web Journal: Special Issue on Semantic Web for Industrial Engineering: Research and Applications. 2022
• Himangshu Sarma, Arun Baran Samaddar, Robert Porzel, Jan Smeddinck and Rainer Malaka. Updating Bayesian networks using crowds. Neural Network World. 27. 529-540, 2017.
• Himangshu Sarma, Robert Porzel, Jan Smeddinck, Rainer Malaka and Anrun Daran Samaddar. A Text to Animation System for Physical Exercises. The Computer Journal, 2018/02/21.
• Wuest, T., Tinscher, R., Porzel, R. & Thoben, K.-D. Experimental research data quality in materials science. International Journal of Advanced Information Technology, 6(4), 1-16, 2014.
• Jan Gehrke, Othein Herzog, Hagen Langer, Rainer Malaka, Robert Porzel and Tobias Warden,An Agent-Based Approach to Autonomous Logistic Processes. In: Künstliche Intelligenz, 2/2010.
• Robert Porzel. Glück im Lernen. Kultur und Management im Dialog, 39 (1), 2010.
• Daniel Oberle, Anupriya Ankolekar, Pascal Hitzler, Philipp Cimiano, Michael Sintek, Malte Kiesel, Babak Mougouie, Stephan Baumann, Shankar Vembu, Massimo Romanelli, Paul Buitelaar, Ralf Engel, Daniel Sonntag, Norbert Reithinger, Berenike Loos, Hans-Peter Zorn, Vanessa Micelli, Robert Porzel, Christian Schmidt, Moritz Weiten, Felix Burkhardt, Jianshen Zhou, DOLCE ergo SUMO: On foundational and domain models in the SmartWeb Integrated Ontology (SWIntO). Journal of Web Semantics: Science, Services and Agents on the World Wide Web 5 (2007) 156-174.
• Ralf Meyer-Klabunde, and Robert Porzel. Tailoring Spatial Descriptions to the Addressee: A Constraint Based Approach. Linguistics 36 (3), 1998.

Conference Papers

• Pomarlan, M., Hedblom, M. M., Spillner, L., & Porzel, R. Revising defeasible theories via instructions. Rules and Reasoning?: 8th International Joint Conference, RuleML+RR 2024, Bucharest, Romania, September 16–18, 2024, Proceedings, 176–190, 2024.
• Nima Zargham, Vino Avanesi, Thomas Mildner, Kamyar Javanmardi, Robert Porzel and Rainer Malaka. HASI: A Model for Human-Agent Speech Interaction. In Proceedings of CUI '24: ACM Conversational User Interfaces. Luxembourg City, Luxembourg from 8th–10th July 2024.
• Jens Nevens, Robin De Haes, Rachel Ringe, Mihai Pomarlan, Robert Porzel, Katrien Beuls and Paul Van Eecke. A Benchmark for Recipe Understanding in Artificial Agents. In Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024), Torino, Italy, 20-25 May, 2024.
• Shiyao Zhang, Omar Faruk, Robert Porzel, Dennis Küster, Tanja Schultz and Hui Liu. Examining the Effects of Human-Likeness of Avatars on Emotion Perception and Emotion Elicitation. In Proceedings of the 6th International Conference on Activity and Behavior Computing, Nakatsu and Kitakyushu, Kyushu, Japan, May 28-31, 2024.
• Christian Jaros, Eric Hiu-Sing Lau, Robert Porzel and Tanja D?ring. Breaking Barriers: Unveiling Trust Dynamics between Tangible and Graphical User Interfaces. Workshop at Mensch und Computer, 1.–4. September, 2024.
• Shiyao Zhang, Sergei Kolensnikov, Till Rennspie?, Robert Porzel, Tanja Schultz and Hui Liu. Really Can’t Hold On Anymore? Physiological Indicators Versus Self-Reported Motivation Drop During Jogging. In Proceedings of the 17th International Conference on Bio-inspired Systems and Signal Processing (BIOSIGNALS 2024), Rome, Italy, February 21 - 23, 2024.
• Robin Nolte, Mihai Pomarlan, Daniel Be?ler, Robert Porzel, Rainer Malaka and John Bateman. Towards an Ontology for Robot Introspection and Metacognition. In Proceedings of the 13th International Conference on Formal Ontology in Onformation Systems (FOIS 2023). Sherbrooke, Qc, Canada, 2023.
• Laura Spillner, Robert Porzel, Robin Nolte and Rainer Malaka. Conceptual Shadows: Visualizing Concept-specific Dimensions of Meaning in Word Embeddings with Self Organizing Maps. In Proceedings of CAOS VII at the Formal Ontology in Information Systems Conference (FOIS), Sherbrooke, Qc, Canada, July 20th, 2023.
• Nima Zargham, Dmitry Alexandrovsky, Thomas Mildner, Robert Porzel and Rainer Malaka. "Let's Face It": Investigating User Preferences for Virtual Humanoid Home Assistants. HAI '23: Proceedings of the 11th International Conference on Human-Agent Interaction, December 2023, Pages 246–256.
• Laura Spillner, Nima Zargham, Mihai Pomarlan, Robert Porzel and Rainer Malaka. Finding Uncommon Ground: A Human-Centered Model for Extrospective Explanations. In Proceedings of Explainable AI (XAI2023) at the International Joint Conference on Artificial Intelligence (IJCAI), Macao, China, August 19th, 2023.
• Laura Spillner, Rachel Ringe, Robert Porzel and Rainer Malaka. “My, my, how can I resist you?” Examining User Reactions to Bogus Explanations of AI Prediction. In Proceedings of Ethics and Trust in Human-AI Collaboration: Socio-Technical Approachesat the International (ETHAICS) Joint Conference on Artificial Intelligence (IJCAI), Macao, China, August 21th, 2023.
• Mona Abdel-Keream, Daniel Be?ler, Ayden Janssen, Sascha Jongebloed, Robin Nolte, Mihai Pomarlan and Robert Porzel. We'll give you what you want: An Ontological Model of User Preferences. In Proceedings of the Robontics Workshop at the IEEE RO-MAN Conference, Busan, Korea, August 31, 2023.
• Malte Borgwardt, Jonas Boueke, María Fernanda Sanabria, Michael Bonfert and Robert Porzel. VRisbee: How Hand Visibility Impacts Throwing Accuracy and Experience in Virtual Reality. In Proceedings of the ACM CHI Conference on Human Factors in Computing Systems, Hamburg, Germany, 2023.
• Ringe, Rachel and Porzel, Robert. Towards a Task-based Metric for Measuring Trust in Autonomous Robots for Everyday Activities. In Proceedings of the CHI TRAIT Workshop on Trust and Reliance in AI-Assisted Tasks, Hamburg, Germany, 2023.
• Robert Porzel, Mihai Pomarlan, Laura Spillner, John Bateman, Thomas Mildner, Carlo Santagiustina. Narrativizing Knowledge Graphs. Joint Proceedings of the 3th International Workshop on Artificial Intelligence Technologies for Legal Documents (AI4LEGAL 2022) and the 1st International Workshop on Knowledge Graph Summarization (KGSum 2022) co-located with the 21st International Semantic Web Conference (ISWC 2022). Virtual Event, Hangzhou, China, October 23-24, 2022.
• Mihai Pomarlan and Robert Porzel. Narrative Objects. In Proceedings of the IJCAI/ECAI Workshop on Semantic Techniques for Narrative-based Understanding. Vienna, Austria, July 23, 2022.
• Thomas Mildner, Robert Porzel, Laura Spillner and Carlo R. M. A. Santagiustina. Towards Conflictual Narrative Mechanics. In Proceedings of the IJCAI/ECAI Workshop on Semantic Techniques for Narrative-based Understanding. Vienna, Austria, July 23, 2022.
• Bastian D?nekas, Tanja D?ring, Tjorven Schnack, Georg Volkmar, Robert Porzel and Rainer Malaka. Insights from two Studies on AI-based Learning in Strength Training. In Proceedings of New Trends in HCI and Sports, Workshop at the ACM International Conference on Mobile Human-Computer Interaction, Sept. 28 - Oct. 1, Vancouver, Canada, 2022.
• Michael Bonfert, Stella Lemke, Robert Porzel and Rainer Malaka. Kicking in Virtual Reality: The Influence of Foot Visibility on the Shooting Experience and Accuracy. In Proceedings of the Conference on Virtual Reality and 3D User Interfaces (VR). IEEE, Online, 2022.
• Daniel Be?ler, Robert Porzel, Mihai Pomarlan, Abhijit Vyas, Sebastian H?ffner, Michael Beetz, Rainer Malaka and John Bateman. Foundations of the Socio-physical Model of Activities (SOMA) for Autonomous Robotic Agents. In Proceedings of the 12th International Conference on Formal Ontology in Information Systems. Bolzano, Italy, 13-16 September 2021.
• Robert Porzel. On Formalizing Narratives. In Proceedings of the JOWO - Ontology Workshops - Cognition and Ontologies (CAOS V). Bolzano, Italy, 2021.
• Mihai Pomarlan, Maria M. Hedblom and Robert Porzel. Panta Rhei: Curiosity-Driven Exploration to Learn the Image-Schematic Affordances of Pouring Liquids. In Proceedings of the 29th Irish Conference on Artificial Intelligence and Cognitive Science, Dublin, Ireland, 2021.
• Maria M. Hedblom, Mihai Pomarlan, Robert Porzel, Daniel Be?ler, Gayane Kazhoyan, Rainer Malaka and Michael Beetz. Dynamic Action Selection Using Image Schema-based Reasoning for Robots. In Proceedings of the JOWO - Ontology Workshops - Cognition and Ontologies (CAOS V). Bolzano, Italy, 2021.
• Nima Zargham, Michael Bonfert, Robert Porzel, Tanja Doring and Rainer Malaka. Multi-Agent Voice Assistants: An Investigation of User Experience. MUM 2021: 20th International Conference on Mobile and Ubiquitous Multimedia, December 2021.
• Michael Bonfert, Nima Zargham, Florian Saade, Robert Porzel and Rainer Malaka. An Evaluation of Visual Embodiment for Voice Assistants on Smart Displays. In Proceeding of Conversational User Interfaces (CUI), 27th-29th of July, 2021.
• Robert Porzel, Vanja Sophie Cangalovic and John A. Bateman. Filling Constructions: Applying Construction Grammar in the Kitchen. In Proceedings of the 11th International Conference on Construction Grammar. Antwerp, Belgium, 2021.
• Vanja Sophie Cangalovic, Robert Porzel and John A. Bateman. Streamlining Formal Construction Grammar. In Proceedings of the ICCG11 Workshop on Constructional Approaches in Formal Grammar. Antwerp, Belgium, 2021.
• Daniel Be?ler, Robert Porzel, Mihai Pomarlan, Michael Beetz, Rainer Malake and John Bateman. A Formal Model of Affordances for Flexible Robotic Task Execution. In Proceedings of the 24th European Conference on Artificial Intelligence Santiago de Compostela, Spain, June 8. - 12. 2020.
• Robert Porzel and Vanja Cangalovic. What Say You: An Ontological Representation of Imperative Meaning for Human-Robot Interaction. In Proceedings of the JOWO - Ontology Workshops. Bolzano, Italy, 2020.
• Nima Zargham, Michael Bonfert, Georg Volkmar, Robert Porzel, and Rainer Malaka. 2020. Smells Like Team Spirit: Investigating the Player Experience with Multiple Interlocutors in a VR Game. In Extended Abstracts of the Annual Symposium on Computer-Human Interaction in Play, November 2–4, 2020, Virtual Event, Canada. ACM, New York, NY, USA, 2020.
• Mihai Pomarlan, Vanja Sophie Cangalovic, Robert Porzel and John Bateman. Human, we have a problem: What to say when things go wrong. In Proceedings of the NLG for HRI Workshop at the International Conference on Human–Robot Interaction. Cambridge, UK, March 23, 2020.
• Johannes Pfau, Robert Porzel, Mihai Pomarlan, Vanja Sophie Cangalovic, Supara Grudpan, Sebastian H?ffner, John Bateman and Rainer Malaka. Give MEANinGS to Robots with Kitchen Clash: A VR Human Computation Serious Game for World Knowledge Accumulation. In Proceedings of the International Conference on Entertainment Computing (ICEC) & Joint Conference on Serious Games (JCSG), Arequipa, Perú, November 11-15th, 2019.
• Bonfert, Michael, Porzel, Robert, Malaka, Rainer. Get a Grip! Introducing Variable Grip for Controller-Based VR Systems. In Proceedings of the Conference on Virtual Reality and 3D User Interfaces (VR). IEEE, Osaka, 2019.
• Be?ler, Daniel, Robert Porzel, Mihai Pomarlan and Michael Beetz. Foundational Models for Manipulation Activity Parsing. In Proceedings of AR and VR Conference: Changing Realities in a Dynamic World, Munich, 2019.
• Meier, Moritz and Mason, Celeste and Porzel, Robert and Putze, Felix and Schultz, Tanja. Synchronized Multimodal Recording of a Table Setting Dataset. In Proceedings of the IROS 2018 Workshop on Latest Advances in Big Activity Data Sources for Robotics and New Challenges, Madrid, Spain, 2018.
• Mihai Pomarlan, Robert Porzel, John Bateman and Rainer Malaka. From Sensors to Sense: Integrated Heterogeneous Ontologies for Natural Language Generation. In Proceedings of the NLG for HRI Workshop at the 11th International Conference on Natural Language Generation. Tilburg, The Netherlands, November 5-8, 2018.
• Ambreen Zaman, Carolin Stellmacher, Zihe Xu, Anna-Viktoria Marutschke and Robert Porzel. Step up the volume: Investigating the environmental effect on the range of possible foot-based interactions. In Proceedings of 12th International Conference on Software, Knowledge, Information Management & Applications, Phnom Penh, Cambodia, 3-5 Dec 2018.
• Michael Bonfert, Maximilian Splieth?ver, Roman Arzaroli, Marvin C. Lange, Martin Hanci and Robert Porzel. If you ask nicely: A Digital Assistant Rebuking Impolite Voice Commands. In Proceedings of the 20th International Conference on Multimodal Interaction, Boulder, Colorado. October 16-20th, 2018.
• Susanne Putze, Gian-Luca Savino, Robert Porzel and Rainer Malaka. A Manageable Model for Experimental Research Data: An Empirical Study in the Materials Sciences. In Proceedings of 30th International Conference on Advanced Information Systems Engineering. Tallinn, Estonia, 11-15 June 2018.
• Sandeep Kumar Dash, Partha Pakray, Jan Smeddinck, Robert Porzel, Rainer Malaka and Alexander Gelbukh. Designing An Ontology for Physical Exercise Actions. In Proceedings of the 18th International Conference on Computational Linguistics and Intelligent Text Processing, April 17 to 23, 2017 ? Budapest, Hungary.
• Till Becker, Michael Lütjen, and Robert Porzel. Process maintenance of heterogeneous logistic systems - a process mining approach. In Proceedings of the 5th International Conference on Dynamics in Logistics, Bremen, Germany, February 22 – 25, 2016.
• Himangshu Sarma, Robert Porzel, and Rainer Malaka: A step towards automated simulation in industry. In Proceedings of the 5th International Conference on Dynamics in Logistics, Bremen, Germany, February 22 – 25, 2016.
• Michael Freitag, Martin Gogolla, Hans J?rg Kreowski, Michael Lütjen, Robert Porzel, and Klaus Dieter Thoben: Towards a unified logistics modelling language: constraints and objectives. In Proceedings of the 5th International Conference on Dynamics in Logistics, Bremen, Germany, February 22 – 25, 2016.
• Felix Ritter, Robert Porzel, Fariba Mostajeran Gourtani and Rainer Malaka. Brain-Computer-Interface for Software Control in Medical Interventions. In Proceedings of the 15th CURAC, Bremen, Germany, 2015.
• Himangshu Sarma, Robert Porzel, Jan Smeddinck and Rainer Malaka, University of Bremen. Towards Generating Virtual Movement from Textual Instructions A Case Study in Quality Assessment. In Proceedings of HCOMP, San Diego, USA, 2015.
• Christina Freihorst, Simón Algorta, Vivien Mast and Robert Porzel. When Apples Mean Oranges: Lexical De-Entrainment and Alignment Theories. In Proceedings of SemDial 2013. Amsterdam, NL, 2013.
• Robert Porzel, Adeel Naveed, Yuting Chen and Marc Herrlich. Strategy, Ownership and Space: The Logistics of Collaborative Interaction. In Proceedings of the Mensch und Computer 2013 Workshop on Interactive Spaces, Bremen, Germany, 2013.
• Markus Krause and Robert Porzel. It is about Time: Time Aware Quality Management for Interactive Systems with Humans in the Loop. In Proceedings of CHI'13, Paris France, 2013.
• Robert Porzel, Tobias Warden, Markus Aust and Farideh Ganji, Anwendungspotentiale von Mixed-Reality-Simulationen in der Entwicklung selbststeuernder Montageprozesse. In Proceedings of the 10th Workshop on Augmented & Virtual Reality in der Produktentstehung, Paderborn, 19.-20. May 2011.
• Robert Porzel and Tobias Warden,Working Simulations with a Foundational Ontology. In: Schill, K.; Scholz-Reiter, B.; Frommberger, L. (eds.): Proceedings of the Workshop on Artificial Intelligene and Logistics at the19th European Conference on Artificial Intelligence, Lisbon, August 2010.
• Yuting Chen, Adeel Naveed and Robert Porzel. Behavior and Preference in Minimal Personality: A Study on Embodied Conversational Agents. In Proceedings of the 12th International Conference on Multimodal Interfaces. Peking, China, November 8-12, 2010.
• Lutz Dickmann, Tobias Lensing, Robert Porzel, Christoph Lischka and Rainer Malaka, Sketch-based Interfaces: Exploiting Spatio-temporal Context for Automatic Stroke Grouping.  In Proceedings of the 10th International Symposium on Smart Graphics, Banff, Canada, June 24-26, 2010.
• Tobias Warden, Robert Porzel, Jan D. Gehrke, Otthein Herzog, Hagen Langer and Rainer Malaka.Towards Ontology-based Multiagent Simulations: The PlaSMA Approach. In Proceedings of the 24th European Conference on Modelling and Simulation, June 1st - 4th, Kuala Lumpur, Malaysia, 2010.
• Jan Smeddinck, Kamila Wajda, Adeel Naveed, Leen Touma, Yuting Chen, Muhammad Abu Hasan, Waqas Latif and Robert Porzel,QuickWoZ: A Multi-purpose Wizard-of-Oz Framework for Experiments with Embodied Conversational Agents. In Proceedings of the International Conference on Intelligent User Interfaces, Hong Kong, 07-10 February, 2010.
• Aneta Takhtamysheva, Robert Porzel and Markus Krause. Games for Games. Learning Action Descriptions for Interactive Fiction Games. Human Computation , Workshop at the 15th ACM SIGKDD conference on Knowledge Discovery and Data Mining, Paris, France; 2009.
• Rainer Malaka and Robert Porzel,Design Principles for Embodied Interaction. In: Mertsching, B.; Hund, M.; Aziz, Z. (eds.): KI 2009. Advances in artificial intelligence, Springer, Heidelberg, 2009, pp. 711-718.
• Vanessa Micelli, and Robert Porzel, Formal Models of Construction Grammar: Usage, Gains and Challenges. In Proceedings of the Second International Conference of the German Cognitive Linguistics Association, October 2006. Munich, Germany.
• Robert Porzel and Hans-Peter Zorn and Berenike Loos and Rainer Malaka, Towards a Seperation of Pragmatic Knowledge and Contextual Information. In Proceedings of ECAI'06 Workshop on Context and Ontology, Riva del Garda, August 28, 2006.
• Robert Porzel and Annika Scheffler and Rainer Malaka.How Entrainment Increases Dialogical Efficiency. In Proceedings of Workshop on on Effective Multimodal Dialogue Interfaces, Sydney, January, 29th, 2006.
• Robert Porzel, Vanessa Micelli, Hidir Aras, and Hans-Peter Zorn,Tying the Knot: Ground Entities, Descriptions and Information Objects for Construction-based Information Extraction. In Proceedings of the OntoLex Workshop at LREC, pp. 35 - 40. May 2006. Genoa, Italy.
• Paul Buitelaar, Thierry Declerck, Anette Frank, Stefania Racioppa, Malte Kiesel, Michael Sintek, Ralf Engel, Massimo Romanelli, Daniel Sonntag, Berenike Loos, Vanessa Micelli, Robert Porzel and Philipp Cimiano, LingInfo: Design and Applications of a Model for the Integration of Linguistic Information in Ontologies In Proceedings of the OntoLex Workshop at LREC, Genua Italy, pp. 28-32. May 2006.
• Arndt Faulhaber, Berenike Loos, Robert Porzel and Rainer Malaka, Towards Understanding the Unknown: Open-class Named Entity Classification in Multiple Domains. In Proceedings of the Ontolex Workshop at LREC, Genua Italy, 2006.
• Vanessa Micelli, Robert Porzel and Aldo Gangemi, ECtoloG: Construction Grammar Meets the Semantic Web. In Proceedings of the Fourth International Conference on Construction Grammar (ICCG4), Tokyo, Japan, September 1-3, 2006.
• Berenike Loos and Robert Porzel, Towards Ontology-based Pragmatic Analysis. In Proceedings of DIALOR'05, Nancy, France, 2005.
• Robert Porzel and Manja Baudis, The Tao of CHI: Towards Effective Human-Computer Interaction. In Proceedings of HLT-NAACL 2004: Main Proceedings Susan Dumais, Daniel Marcu and Salim Roukos (eds.), May 2 - May 7, Boston, Massachusetts, USA, pages 209--216, 2004.
• Robert Porzel and Rainer Malaka,A Task-based Approach for Ontology Evaluation. In Proceedings of ECAI-2004 Workshop on Ontology Learning and Population, Valencia, Spain, 2004.
• Robert Porzel and Rainer Malaka. Towards Measuring Scalability in Natural Language Understanding Tasks
  In Proceedings of the 2nd International Workshop on Scalable Natural Language Understanding (ScaNaLU 2004) at HLT-NAACL 2004
  May 2-7. Association for Computational Linguistics, Boston, Massachusetts, USA
  pages 9-16.
• Robert Porzel, Berenike Loos and Vanessa Micelli, Making Relative Sense: From Word-graphs to Semantic Frames. In Proceedings of the HLT-NAACL 2004 Workshop on Scalable Natural Language Understanding, May 2 - May 7, Boston, Massachusetts, USA, pp. 57-64.
• Berenike Loos. and Robert Porzel, Resolution of Lexical Ambiguities in Spoken Dialogue Systems. In Proceedings of the 5th SIGdial Workshop on Discourse and Dialogue, April 30 - May 1 2004, Cambridge, Massachusetts, USA, pp 55-62.
• Iryna Gurevych, Rainer Malaka, Robert Porzel and Hans-Peter Zorn, Semantic Coherence Scoring Using an Ontology. In Proceedings of the Joint Human Language Technology and Northern Chapter of the Association for Computational Linguistics Conference (HLT-NAACL), Edmonton, Canada. pp. 88-95, 2003.
• Iryna Gurevych, Robert Porzel, Elena Slinko, Norbert Pfleger, Jan Alexandersson, and Stefan Merten, Less is More: Using a Single Knowledge Representation in Dialogue Systems. In Proceedings of the HLT-NAACL Workshop on Text Meaning, Edmonton, Canada. pp. 14-21, 2003.
• Iryna Gurevych, Stefan Merten and Robert Porzel, Automatic Creation of Interface Specifications from Ontologies. In Proceedings of the HLT-NAACL Workshop on the Software Engineering and Architecture of Language Technology Systems (SEALTS), Edmonton, Canada. pp. 60-67, 2003.
• Iryna Gurevych and Robert Porzel, Using knowledge-based scores for identifying best speech recognition hypothesis. In Proceedings of ISCA Tutorial and Research Workshop on Error Handling in Spoken Dialogue Systems, Chateau-d'Oex-Vaud, Switzerland. pp. 77-81, 2003.
• Robert Porzel, Norbert Pflege, Stefan Merten, Markus L?ckelt, Iryna Gurevych, Ralf Engel and Jan Alexandersson. More on Less: Further Applications of Ontologies in Multi-Modal Dialogue Systems. In Proceedings of the IJCAI Workshop on Knowledge and Reasoning in Practical Dialogue Systems, Acapulco, Mexico, 2003.
• Robert Porzel and Iryna Gurevych, Contextual Coherence in Natural Language Processing. In Proceedings of the 4th International Conference on Modeling and Using Context.Lecture Notes in Artificial Intelligence. Blackburn, P., Chidini, C., Turner, R., Giunchigla, F. (eds.). pp. 272-285, Springer Verlag, Heidelberg etc., Germany, 2003.
• Robert Porzel, Iryna Gurevych and Christof Müller, Ontology-based Contextual Coherence Scoring. In Proceedings of the Fourth SIGdial Workshop on Discourse and Dialogue, Sapporo, Japan. pp. 178-186, Association for Computational Linguistics, 2003.
• Robert Porzel and John Bryant, Employing the Embodied Construction Grammar Formalism for Knowledge Represenation: The Case of Construal Resolution. In Proceedings of the 8th International Conference on Cognitive Linguistics, Logrono, Spain, 2003.
• Robert Porzel and Iryna Gurevych, Towards Context-adaptive Utterance Interpretation. In Proceedings of the 3rd SIGDial Workshop on Discourse and Dialogue. Association for Computational Linguistics, Philadelphia, 2002.
• Iryna Gurevych, Strube, Michael and Porzel, Robert. Annotating the Semantic Consistency of Speech Recognition Hypotheses. In Proceedings of the 3rd SIGDial Workshop on Discourse and Dialogue. Association for Computational Linguistics, Philadelphia, 2002.
• Nancy Chang, Jerry Feldman, Robert Porzel and Keith Sanders, Scaling Cognitive Linguistics: Formalisms for Language Understanding. In Proceedings of the 1st International Wokshop on Scalable Natural Language Understanding (ScaNaLU), Heidelberg, 2002.
• Robert Porzel and Tomasz Marcinak, Encoding Spatial Localizations with Construction Grammar. In Proceedings of the 2nd International Conference on Construction Grammar, University of Helsinki, 2002.
• John Bryant, Nancy Chang, Robert Porzel and Keith Sanders, Where is Natural Language Understanding? Towards Context-dependent Utterance Interpretation. In Proceedings of the 7th Annual Conference on Architectures and Mechanisms for Language Processing (AMLaP). Saarbrücken, 2001.
• Rainer Malaka, Robert Porzel, Alexander Zipf and Vasu Chandrasekhara, Creating Your Personal Mobile Assistant. In Proceedings of the Workshop Artificial Intelligence in Mobile Systems, ECAI 2000, Berlin.
• Rainer Malaka and Robert Porzel, Integration of Smart Components for Building Your Personal Mobile Guide. In Proceedings of the ECAI Workshop on Artifical Intelligence in Mobile Systems, Berlin, Germany, 2000.
• Chrisitan Kray and Robert Porzel, Spatial Cognition and Natural Language Interfaces in Mobile Personal Assistants. In Proceedings of the Workshop Artificial Intelligence in Mobile Systems, ECAI 2000, Berlin.

Posters

• Johanne Hesselbach, Manuel Hahn, Axel S. Herrmann, Susanne Putze, Robert Porzel, Rainer Malaka, Stefan Wellsandt, Klaus-Dieter Thoben, Klaus Burkart, Hans-Werner Zoch, Munip Dalgic and Andree Irretier. Scientific data management in materials sciences – data models and user interactions for fibre-reinforced plastics. Poster at the 4th International Conference & Exhibition on Thermoplastic Composites (ITHEC), Bremen, 30 – 31 October 2018.
• Susanne Putze, Robert Porzel and Rainer Malaka. Advantages of a Model-Based  Library for Scientific Experiments. In Proceedings of the Joint Conference on Digital Libraries. Fort Worth, Texas, June 3 - 6, 2018.
• Gian-Luca Savino and Robert Porzel. A Semi-automatic Approach for Constructing Construction Grammars. Poster at the Interdisciplinary College on Transitions and Transformations in Cognition, Biology, and Interactive Systems, Günne, Germany, 2016.
• Robert Porzel and Tobias Warden, Towards a Foundational Simulation Ontology. Poster at the Interdisciplinary College on Play, Act and Learn, Günne, Germany, 2010.
• Robert Porzel and Aneta Takhtamysheva, What You Play is What You Get. Poster at the International Summer School on Embodied Language Games and Construction Grammar, 29 August - 4 September 2009 Palazzone di Cortona, Tuscany, Italy.
• Jan Gehrke and Hagen Langer and Robert Porzel.Knowledge Management for Autonomous Logistics. Poster at the Interdisciplinary College on Cooperation, Günne, Germany, 2008.
• Sebastian F?rster and Robert Porzel, Interacting with Digital Music: A Thought Experiment. Poster at the Interdisciplinary College on Rhythm and Timing, Günne, Germany, 2009.
• Vanessa Micelli and Robert Porzel, Constructing Constructions for Language Processing. Poster at the International Atelier on Modeling Language Evolution with Computational Construction Grammar at the International Summer School on Semiotic Dynamics and Statistical Physics of Social Dynamics and Language, Erice, Italy, 16th July, 2007. 

Technical Reports/Other

• Daniel Be?ler, Robert Porzel, Mihai Pomarlan, Abhijit Vyas, Sebastian H?ffner, Michael Beetz,Rainer Malaka, and John Bateman. Foundations of the Socio-physical Model of Activities (SOMA) for Autonomous Robotic Agents. arXiv 2011.11972
• Petra Boxler, Maren Pra?, Robert Porzel, Anneliese Nottebaum und J?rg Kastens. konstruktiv: Für Lehrende mit Pioniergeist – und solche, die es werden wollen. Resonanz, Universit?t Bremen, 15. Oktober 2018.
• Robert Porzel, How People (Should) Talk to Computers. In Proceedings of the Workshop on How People Talk to Computers, Robots, and Other Artificial Communication Partners. Fischer, K. (ed.), SFB/TR 8 Report No. 010-09/2006.
• Chrisitan Ebert, Daniel Glatz, Martin Jansche, Ralf Meyer-Klabunde and Robert Pozel, From Conceptualization to Formulation in Generating Spatial Descriptions. In Schmid, U.; Krems, J. & Wysotzki, F. (eds.), Proceedings of the First European Workshop on Cognitive Modeling. Forschungsberichte des Fachbereichs Informatik, Report No.96-39, 1996, Technical University of Berlin.
• Jansche, M. and Porzel, R. ParOLE: A cognitively motivated NLG system for Spatial Descriptions. Arbeiten aus dem SFB 245 ``Sprache und Situation'', Report Nr. 93, 1996, Univs. of Heidelberg and Mannheim.
• Meyer-Klabunde, R., Glatz, D. and Porzel, R. Some Issues in Generating Preverbal Messages: The Case of Spatial Descriptions. In Meyer-Klabunde, R. & von Stutterheim, C. (Eds.) Proceedings of a Workshop on Conceptual and Semantic Knowledge in Language Production, Arbeiten aus dem SFB 245 `"Sprache und Situation'', Report Nr. 92, 1996, Univs. of Heidelberg and Mannheim.
• Porzel, R. Changing the Point of View and the Linearization Strategy within Spatial Descriptions: Modeling the Linearization Processes with Granular Representations. Arbeiten aus dem SFB 245 "Sprache und Situation'', Report Nr. 94, 1996, Univs. of Heidelberg and Mannheim.
• Glatz, D., Meyer-Klabunde, R. and Porzel, R. Towards the Generation of Preverbal Messages for Spatial Descriptions. Arbeiten aus dem SFB 245 "Sprache und Situation'', Report Nr. 91, 1995, Univs. of Heidelberg and Mannheim.