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228 results on '"Moraitis, Pavlos"'

1. Admissibility in Strength-based Argumentation: Complexity and Algorithms (Extended Version with Proofs)

Author

Bacquey, Yohann, Mailly, Jean-Guy, Moraitis, Pavlos, and Rossit, Julien

Subjects
Computer Science - Artificial Intelligence
Abstract

Recently, Strength-based Argumentation Frameworks (StrAFs) have been proposed to model situations where some quantitative strength is associated with arguments. In this setting, the notion of accrual corresponds to sets of arguments that collectively attack an argument. Some semantics have already been defined, which are sensitive to the existence of accruals that collectively defeat their target, while their individual elements cannot. However, until now, only the surface of this framework and semantics have been studied. Indeed, the existing literature focuses on the adaptation of the stable semantics to StrAFs. In this paper, we push forward the study and investigate the adaptation of admissibility-based semantics. Especially, we show that the strong admissibility defined in the literature does not satisfy a desirable property, namely Dung's fundamental lemma. We therefore propose an alternative definition that induces semantics that behave as expected. We then study computational issues for these new semantics, in particular we show that complexity of reasoning is similar to the complexity of the corresponding decision problems for standard argumentation frameworks in almost all cases. We then propose a translation in pseudo-Boolean constraints for computing (strong and weak) extensions. We conclude with an experimental evaluation of our approach which shows in particular that it scales up well for solving the problem of providing one extension as well as enumerating them all., Comment: This is an extended version of a paper accepted at COMMA 2022. 17 pages, 10 figures

Published
2022

4. An Agent-Based System for Printed/Handwritten Text Discrimination

Author

Cloppet, Florence, Moraitis, Pavlos, Vincent, Nicole, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, An, Bo, editor, Bazzan, Ana, editor, Leite, João, editor, Villata, Serena, editor, and van der Torre, Leendert, editor

Published
2017
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5. Some Theoretical Results on the Relationship Between Argumentation and Coherence Theory

Author

Dimopoulos, Yannis, Moraitis, Pavlos, Sierra, Carles, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Criado Pacheco, Natalia, editor, Carrascosa, Carlos, editor, Osman, Nardine, editor, and Julián Inglada, Vicente, editor

Published
2017
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6. Conflicts Resolution with the SoDA Methodology

Author

Spanoudakis, Nikolaos I., Kakas, Antonis C., Moraitis, Pavlos, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Aydoğan, Reyhan, editor, Baarslag, Tim, editor, Gerding, Enrico, editor, Jonker, Catholijn M., editor, Julian, Vicente, editor, and Sanchez-Anguix, Victor, editor

Published
2017
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7. Empirical Evaluation of Strategies for Multiparty Argumentative Debates

Author

Kontarinis, Dionysios, Bonzon, Elise, Maudet, Nicolas, Moraitis, Pavlos, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Kobsa, Alfred, editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Tanaka, Yuzuru, editor, Wahlster, Wolfgang, editor, Siekmann, Jörg, editor, Bulling, Nils, editor, van der Torre, Leendert, editor, Villata, Serena, editor, Jamroga, Wojtek, editor, and Vasconcelos, Wamberto, editor

Published
2014
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8. Argumentation Based Modelling of Embedded Agent Dialogues

Author

Dimopoulos, Yannis, Kakas, Antonis C., Moraitis, Pavlos, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Parsons, Simon, editor, Maudet, Nicolas, editor, Moraitis, Pavlos, editor, and Rahwan, Iyad, editor

Published
2006
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9. Layered Strategies and Protocols for Argumentation-Based Agent Interaction

Author

Kakas, Antonis, Maudet, Nicolas, Moraitis, Pavlos, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Rahwan, Iyad, editor, Moraïtis, Pavlos, editor, and Reed, Chris, editor

Published
2005
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10. Using Agent Technology for Ambient Assisted Living

Author

Spanoudakis, Nikolaos I., Moraitis, Pavlos, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Boella, Guido, editor, Elkind, Edith, editor, Savarimuthu, Bastin Tony Roy, editor, Dignum, Frank, editor, and Purvis, Martin K., editor

Published
2013
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12. Using ASEME Methodology for Model-Driven Agent Systems Development

Author

Spanoudakis, Nikolaos, Moraitis, Pavlos, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Weyns, Danny, editor, and Gleizes, Marie-Pierre, editor

Published
2011
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13. Argumentative Alternating Offers

Author

Hadidi, Nabila, Dimopoulos, Yannis, Moraitis, Pavlos, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, McBurney, Peter, editor, Rahwan, Iyad, editor, and Parsons, Simon, editor

Published
2011
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16. Gaia Agents Implementation through Models Transformation

Author

Spanoudakis, Nikolaos, Moraitis, Pavlos, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Yang, Jung-Jin, editor, Yokoo, Makoto, editor, Ito, Takayuki, editor, Jin, Zhi, editor, and Scerri, Paul, editor

Published
2009
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17. Extending Argumentation to Make Good Decisions

Author

Dimopoulos, Yannis, Moraitis, Pavlos, Amgoud, Leila, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Rossi, Francesca, editor, and Tsoukias, Alexis, editor

Published
2009
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18. The Agent Modeling Language (AMOLA)

Author

Spanoudakis, Nikolaos, Moraitis, Pavlos, Carbonell, Jaime G., editor, Siekmann, J\'org, editor, Dochev, Danail, editor, Pistore, Marco, editor, and Traverso, Paolo, editor

Published
2008
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25. Qualitative Preference Modelling in Constraint Satisfaction

Author

Dimopoulos, Yannis, Moraitis, Pavlos, Tsoukiàs, Alexis, Maier, Giulio, editor, Salençon, Jean, editor, Schneider, Wilhelm, editor, Schrefler, Bernhard, editor, Tasso, Carlo, editor, Della Riccia, Giacomo, editor, Dubois, Didier, editor, Kruse, Rudolf, editor, and Lenz, Hanz-Joachim, editor

Published
2006
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27. Engineering JADE Agents with the Gaia Methodology

Author

Moraïtis, Pavlos, Petraki, Eleftheria, Spanoudakis, Nikolaos I., Goos, G., editor, Hartmanis, J., editor, van Leeuwen, J., editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Kowalczyk, Ryszard, editor, Müller, Jörg P., editor, Tianfield, Huaglory, editor, and Unland, Rainer, editor

Published
2003
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38. Argumentation-based Negotiation with Incomplete Opponent Profiles

Author

Dimopoulos, Yannis, Mailly, Jean-Guy, Moraitis, Pavlos, Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision (LAMSADE), Université Paris Dauphine-PSL, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique Paris Descartes (LIPADE - EA 2517), Université Paris Descartes - Paris 5 (UPD5), and Université Paris Dauphine-PSL-Centre National de la Recherche Scientifique (CNRS)

Subjects
[INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract

International audience; Computational argumentation has taken a predominant place in the modeling of negotiation dialogues over the last years. A competent agent participating in a negotiation process is expected to decide its next move taking into account an, often incomplete, model of its opponent. This work provides a complete computational account of argumentation-based negotiation under incomplete opponent profiles. After the agent identifies its best option, in any state of a negotiation , it looks for suitable arguments that support this option in the theory of its opponent. As the knowledge on the opponent is uncertain, the challenge is to find arguments that, ideally, support the selected option despite the uncertainty. We present a negotiation framework based on these ideas, along with experimental evidence that highlights the advantages of our approach.

Published
2019

39. Control Argumentation Frameworks

Author

Dimopoulos, Yannis, Mailly, Jean-Guy, Moraitis, Pavlos, and Dimopoulos, Yannis [0000-0001-9583-9754]

Abstract

Dynamics of argumentation is the family of techniques concerned with the evolution of an argumentation framework (AF), for instance to guarantee that a given set of arguments is accepted. This work proposes Control Argumentation Frameworks (CAFs), a new approach that generalizes existing techniques, namely normal extension enforcement, by accommodating the possibility of uncertainty in dynamic scenarios. A CAF is able to deal with situations where the exact set of arguments is unknown and subject to evolution, and the existence (or direction) of some attacks is also unknown. It can be used by an agent to ensure that a set of arguments is part of one (or every) extension whatever the actual set of arguments and attacks. A QBF encoding of reasoning with CAFs provides a computational mechanism for determining whether and how this goal can be reached. We also provide some results concerning soundness and completeness of the proposed encoding as well as complexity issues. 4678 4685

Published
2018

43. Some Theoretical Results on the Relationship Between Argumentation and Coherence Theory

Author

Sierra, Carles [0000-0003-0839-6233], Dimopoulos, Yannis, Moraitis, Pavlos, Sierra, Carles, Sierra, Carles [0000-0003-0839-6233], Dimopoulos, Yannis, Moraitis, Pavlos, and Sierra, Carles

Abstract

[EN]This work provides initial results on the relationship between argumentation and Paul Thagard’s coherence theory. We study the relationship, via appropriate transformations, between different types of coherent graphs (according to the values in the arcs) and different argumentation frameworks such as Dung’s abstract argumentation framework, weighted argument systems or preference-based argumentation. The practical interest of our study is to show that coherence theory and argumentation can be mutually useful.

Published
2017

44. Argumentation-based agent interaction in an ambient-intelligence contest

Author

Moraitis, Pavlos and Spanoudakis, Nikolaos

Subjects
Decision-making -- Research, Artificial intelligence -- Research, Disability studies -- Psychological aspects, Artificial intelligence, Business, Computers, Computers and office automation industries, Electronics
Abstract

The use of argumentation in ASK-IT (Am bient Intelligence System of Agents for Knowledge-Based and Integrated Services for Mobility-Impaired Users Integrated Project) to model a decision-making process is studied. Argumentation is well suited for implementation of complex preference-reasoning mechanisms and interaction protocols.

Published
2007

45. GORGIAS: Applying argumentation.

Author

Kakas, Antonis C., Moraitis, Pavlos, Spanoudakis, Nikolaos I., Cerutti, Federico, and Booth, Richard

Abstract

This paper presents the past and present efforts of developing real-life applications of argumentation with the Gorgias preference-based structured argumentation framework of Logic Programming with Priorities. Since its free availability on the web in 2003, the Gorgias system has been used by different groups in a variety of real-life applications in areas such as medical support, network security, business computing, ambient intelligence and, recently, in the area of cognitive personal assistants. We briefly review the Gorgias framework and its past applications and present an emerging general methodological approach for developing "decision making" applications of argumentation. This approach allows the development of real world applications directly from their high-level requirements expressed in the language of the application without the need for familiarity with the underlying technical details of argumentation. A new tool, called Gorgias-B, supports this high-level development of applications and automatically generates the underlying argumentation theory in Gorgias code. The paper also reports on ongoing real-life applications in two domains: an eye-clinic assistant for first level support, and systems for patient data access and data sharing agreements according to the relevant legislation and contracts or policies of the several stakeholders involved. The proposed approach is quite general for this type of applications of argumentation and, thus, it can be used with any preference-based argumentation framework. [ABSTRACT FROM AUTHOR]

Published
2019
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46. On the Use of Target Sets for Move Selection in Multi-Agent Debates

Author

Kontarinis, Dionysios, Bonzon, Elise, Maudet, Nicolas, Moraitis, Pavlos, Laboratoire d'Informatique Paris Descartes (LIPADE - EA 2517), Université Paris Descartes - Paris 5 (UPD5), Systèmes Multi-Agents (SMA), Laboratoire d'Informatique de Paris 6 (LIP6), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique Paris Descartes ( LIPADE - EA 2517 ), Université Paris Descartes - Paris 5 ( UPD5 ), Systèmes Multi-Agents ( SMA ), Laboratoire d'Informatique de Paris 6 ( LIP6 ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
[ INFO.INFO-AI ] Computer Science [cs]/Artificial Intelligence [cs.AI], [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract

Short paper.; International audience; In debates, agents are faced with the problem of deciding how to best contribute to the current state of the debate in order to satisfy their own goals. Target sets specify minimal changes on the current state of the debate that are required to achieve such goals, where changes are the addition and/or deletion of attacks among arguments. However, agents may not have the ability to implement all the actions prescribed by a target set, nor to rely on others to help them to do so. In this short paper we provide evidence that this notion is still a useful criterion for move selection.

Published
2014
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47. Picking the Right Expert to Make a Debate Uncontroversial

Author

Kontarinis, Dionysios, Bonzon, Elise, Maudet, Nicolas, Moraitis, Pavlos, Laboratoire d'Informatique Paris Descartes (LIPADE - EA 2517), Université Paris Descartes - Paris 5 (UPD5), Systèmes Multi-Agents (SMA), Laboratoire d'Informatique de Paris 6 (LIP6), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique Paris Descartes ( LIPADE - EA 2517 ), Université Paris Descartes - Paris 5 ( UPD5 ), Systèmes Multi-Agents ( SMA ), Laboratoire d'Informatique de Paris 6 ( LIP6 ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Online debate systems, Argumentation, Multi-agent systems, [ INFO.INFO-AI ] Computer Science [cs]/Artificial Intelligence [cs.AI], [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract

International audience; Agents contributing to (online) debate systems often have different areas of expertise. This must be considered if we want to define a decision making process based on the output of such a system. Distinguishing agents on the basis of their areas of expertise also opens an interesting perspective: when a debate is deemed ''controversial'', calling an additional expert may be a natural way to make the decision easier. We introduce possible definitions that capture these notions and we provide a preliminary analysis with the objective to help a designer find the ''right'' expert.

Published
2012
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48. Tactics and Concessions for Argumentation-based Negotiation

Author

Hadidi, Nabila, Dimopoulos, Yannis, Moraitis, Pavlos, Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision (LAMSADE), Université Paris-Dauphine - Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique Paris Descartes (LIPADE - EA 2517), Université Paris Descartes - Paris 5 (UPD5), Université Paris Dauphine-PSL, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Université Paris Dauphine-PSL-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SCCO.COMP] Cognitive science/Computer science, Argumentation, [SCCO.COMP]Cognitive science/Computer science, Negotiation, Tactics
Abstract

International audience; Argumentation-based negotiation has gained increasing prominence in the multi-agent field over the last years. There is currently a long literature on the use of argumentation in negotiation and especially the modeling of negotiation protocols or decision making mechanisms. However the study of strategic issues that define the behavior of an agent during the negotiation has been largely neglected. This work fills this gap by providing, profile, behavior and time constraints based tactics that can be combined together to implement complex strategies similar to those studied in game-theoretic negotiation. These different tactics lead to different types of concessions. An experimental evaluation shows how tactics and concessions may influence the negotiation length and outcome, under the assumptions of deadlines and the availability of information on the opponent.

Published
2012

49. Towards automating Decision Aiding through Argumentation

Author

Ouerdane, Wassila, Dimopoulos, Yannis, Liapis, Konstantinos, Moraitis, Pavlos, Laboratoire Génie Industriel - EA 2606 (LGI), CentraleSupélec, Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision (LAMSADE), Université Paris Dauphine-PSL, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Department of Hematology, Bone Marrow Transplantation Unit, Evangelismos Hospital, Laboratoire d'Informatique Paris Descartes (LIPADE - EA 2517), Université Paris Descartes - Paris 5 (UPD5), Laboratoire Génie Industriel - EA 2606 ( LGI ), Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision ( LAMSADE ), Université Paris-Dauphine-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Informatique Paris Descartes ( LIPADE - EA 2517 ), Université Paris Descartes - Paris 5 ( UPD5 ), and Université Paris Dauphine-PSL-Centre National de la Recherche Scientifique (CNRS)

Subjects
Decision aiding process, Argumentation schemes, Dialog, [INFO.INFO-RO]Computer Science [cs]/Operations Research [cs.RO], [ INFO.INFO-AI ] Computer Science [cs]/Artificial Intelligence [cs.AI], ComputingMilieux_MISCELLANEOUS, [ INFO.INFO-RO ] Computer Science [cs]/Operations Research [cs.RO], [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract

International audience

Published
2011
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