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Archive for the 'ai' Category

Talk at SRI International, Menlo Park, CA (2011)

On Friday October 14, I gave a talk about some preliminary work on building a PDDL benchmark for First-Person Shooter games at SRI International’s Artificial Intelligence Center, Menlo Park, CA USA, 2011.

The talk was based on the following workshop paper I presented at AIIDE-2011: The SimpleFPS Planning Domain: A PDDL Benchmark for Proactive NPCs.

The details of the talk can be found here. The slides of my presentation can be found here.

A Database-type Approach for Progressing Action Theories with Bounded Effects (Book chapter-2011)

A Database-type Approach for Progressing Action Theories with Bounded Effects, Stavros Vassos, Sebastian Sardina, In Gerhard Lakemeyer and Sheila McIlraith, editors, Knowing, Reasoning, and Acting: Essays in Honour of Hector J. Levesque, College Publications, 2011.
[pdf | citeulike | more]

Continue reading ‘A Database-type Approach for Progressing Action Theories with Bounded Effects (Book chapter-2011)’

The SimpleFPS Planning Domain: A PDDL Benchmark for Proactive NPCs (NPCAI-2011)

The SimpleFPS Planning Domain: A PDDL Benchmark for Proactive NPCs, Stavros Vassos, and Michail Papakonstantinou, In Proceedings of the Non-Player Character AI workshop (NPCAI-2011) of the Artificial Intelligence & Interactive Digital Entertainment (AIIDE-2011) Conference, Stanford CA, USA, 2011.
[pdf | citeulike| slides]
Continue reading ‘The SimpleFPS Planning Domain: A PDDL Benchmark for Proactive NPCs (NPCAI-2011)’

Planning in video games seminar at Hellenic Artificial Intelligence Summer Scholl (HAISS-2011)

Earlier today I gave a seminar about planning and possible applications in video games in the 2nd Hellenic Artificial Intelligence Summer School (HAISS-2011) that was organized by the Hellenic Artificial Intelligence Society (EETN) and the Technoesis network of  the University of Patras, in Patras, Greece.

The slides of my talk (in Greek) can be found  here and the PDDL files mentioned in the talk can be found here. The planner used for the demo is BlackBox which can be found here (for windows use this executable and install the Cygwin DLL or make sure that cygwin1.dll is at the same folder as the BlackBox executable).

The abstract of the talk follows (in Greek).

Πρώτο μέρος: Εισαγωγή στην αναπαράσταση προβλημάτων σχεδιασμού (planning) με βάση τη γλώσσα STRIPS. Προέλαση, οπισθοχώρηση, και ευρετικές συναρτήσεις για την εύρεση λύσης σε προβλήματα σχεδιασμού με βάση την αναζήτηση. Αναπαράσταση προβλημάτων σχεδιασμού στην τυπική γλώσσα PDDL και χρήση του planner BlackBox για την επίλυση προβλημάτων σχεδιασμού στο πεδίο του puzzle game Sokoban.

Δεύτερο μέρος: Εισαγωγή στην ανάπτυξη τεχνητής νοημοσύνης για χαρακτήρες (non-player characters) σε video games και εφαρμογές τεχνικών σχεδιασμού σε εμπορικά video games. Αναπαράσταση των βασικών στοιχείων ενός First-Person Shooter game σε PDDL από την οπτική ενός αντίπαλου χαρακτήρα στον κόσμο του παιχνιδιού, και χρήση του planner BlackBox για την επίλυση προβλημάτων σχεδιασμού που σχετίζονται με τις επιλογές του χαρακτήρα στο παιχνίδι. Σύντομος σχολιασμός επιπλέον τεχνικών όπως η παρακολούθηση εκτέλεσης και ο επανασχεδιασμός.

Organizing Nonmonotonic Reasoning, Action and Change Workshop at IJCAI (NRAC-2011)

Our proposal for organizing the Nonmonotonic Reasoning, Action and Change Workshop at the upcoming IJCAI conference has been accepted! Sebastian Sardina from the Royal Melbourne Institute of Technology and me will be the workshop chairs. Some details follow.

The 9th International Workshop on Nonmonotonic Reasoning, Action and Change (NRAC-2011) will be held as part of the workshop programme of the 2011 International Joint Conference on Artificial Intelligence (IJCAI-2011) at Barcelona, Spain, in July 2011.

NRAC is a well-established forum for researchers interested in sharing their experiences in work in the areas of Nonmonotonic Reasoning, Reasoning about Action, and Belief Revision. An intelligent agent exploring a rich, dynamic world, needs cognitive capabilities in addition to basic functionalities for perception and reaction. The abilities to reason nonmonotonically, to reason about actions, and to change one’s beliefs, have been identified as fundamental high-level cognitive functions necessary for common sense. Research in all three areas has made significant progress during the last two decades of the past century. It is, however, crucial to bear in mind the common goal of designing intelligent agents. Researchers should be aware of advances in all three fields since often advances in one field can be translated into advances in another. Many deep relationships have already been established between the three areas and the primary aim of this workshop is to further promote this cross-fertilization.
This workshop will bring together researchers with the aim to:

  • Compare and evaluate existing formalisms.
  • Report on new developments.
  • Identify the most important open problems and research questions.
  • Identify possibilities of solution transferral between the areas.
  • Identify important challenges for the advancement of the areas.
  • Discuss challenges encountered when applying techniques in applications.

For more information visit the website of NRAC-2011 and the ResearchGate page of NRAC-2011.

A Reasoning Module for Long-Lived Cognitive Agents (Ph.D.-2009)

A Reasoning Module for Long-Lived Cognitive Agents, Stavros Vassos, Ph.D. Thesis, Department of Computer Science, University of Toronto, 2009.
[pdf | citeulike]
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Progressing basic action theories with non-local effect actions (CS-2009)

Progressing basic action theories with non-local effect actions, Stavros Vassos, Sebastian Sardina, and Hector Levesque, In Proceedings of the Ninth International Symposium on Logical Formalizations of Commonsense Reasoning (CS-09), pages 135-140, Toronto, Canada, 2009.
[pdf | citeulike| slides]
Continue reading ‘Progressing basic action theories with non-local effect actions (CS-2009)’

Progressing basic action theories with non-local effect actions (PLS-2009)

Please refer to the longer version of the paper that has been published in Commonsense 2009 here.

First-Order Strong Progression for Local-Effect Basic Action Theories (KR-2008)

First-Order Strong Progression for Local-Effect Basic Action Theories, Stavros Vassos, Gerhard Lakemeyer, and Hector Levesque, In Proceedings of the 11th International Conference on Principles of Knowledge Representation and Reasoning (KR-08), Sydney, Australia, 2008.
[pdf | citeulike | slides]
Continue reading ‘First-Order Strong Progression for Local-Effect Basic Action Theories (KR-2008)’

On the Progression of Situation Calculus Basic Action Theories: Resolving a 10-year-old Conjecture (AAAI-2008)

On the Progression of Situation Calculus Basic Action Theories: Resolving a 10-year-old Conjecture, Stavros Vassos and Hector Levesque, In Proceedings of the Twenty-Third AAAI Conference on Artificial Intelligence (AAAI-08), pages 1004-1009, Chicago, Illinois, USA, 2008.
[pdf | citeulike | slides]
Continue reading ‘On the Progression of Situation Calculus Basic Action Theories: Resolving a 10-year-old Conjecture (AAAI-2008)’