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76 results on '"Chesñevar, Carlos Iván"'

2. A Framework for Combining Defeasible Argumentation with Labeled Deduction

Author

Chesñevar, Carlos Iván and Simari, Guillermo Ricardo

Subjects
Computer Science - Artificial Intelligence, Computer Science - Symbolic Computation
Abstract

In the last years, there has been an increasing demand of a variety of logical systems, prompted mostly by applications of logic in AI and other related areas. Labeled Deductive Systems (LDS) were developed as a flexible methodology to formalize such a kind of complex logical systems. Defeasible argumentation has proven to be a successful approach to formalizing commonsense reasoning, encompassing many other alternative formalisms for defeasible reasoning. Argument-based frameworks share some common notions (such as the concept of argument, defeater, etc.) along with a number of particular features which make it difficult to compare them with each other from a logical viewpoint. This paper introduces LDSar, a LDS for defeasible argumentation in which many important issues concerning defeasible argumentation are captured within a unified logical framework. We also discuss some logical properties and extensions that emerge from the proposed framework., Comment: 15 pages, presented at CMSRA Workshop 2003. Buenos Aires, Argentina

Published
2004

3. Pruning Search Space in Defeasible Argumentation

Author

Chesñevar, Carlos Iván, Simari, Guillermo Ricardo, and García, Alejandro Javier

Subjects
Computer Science - Artificial Intelligence
Abstract

Defeasible argumentation has experienced a considerable growth in AI in the last decade. Theoretical results have been combined with development of practical applications in AI & Law, Case-Based Reasoning and various knowledge-based systems. However, the dialectical process associated with inference is computationally expensive. This paper focuses on speeding up this inference process by pruning the involved search space. Our approach is twofold. On one hand, we identify distinguished literals for computing defeat. On the other hand, we restrict ourselves to a subset of all possible conflicting arguments by introducing dialectical constraints., Comment: 11 pages

Published
2004

4. Integrating Defeasible Argumentation and Machine Learning Techniques

Author

Gomez, Sergio Alejandro and Chesñevar, Carlos Ivan

Subjects
Computer Science - Artificial Intelligence, I.2.0
Abstract

The field of machine learning (ML) is concerned with the question of how to construct algorithms that automatically improve with experience. In recent years many successful ML applications have been developed, such as datamining programs, information-filtering systems, etc. Although ML algorithms allow the detection and extraction of interesting patterns of data for several kinds of problems, most of these algorithms are based on quantitative reasoning, as they rely on training data in order to infer so-called target functions. In the last years defeasible argumentation has proven to be a sound setting to formalize common-sense qualitative reasoning. This approach can be combined with other inference techniques, such as those provided by machine learning theory. In this paper we outline different alternatives for combining defeasible argumentation and machine learning techniques. We suggest how different aspects of a generic argument-based framework can be integrated with other ML-based approaches., Comment: 5 pages

Published
2004

8. Modelling Shared Knowledge and Shared Knowledge Awareness in CSCL Scenarios Through Automated Argumentation Systems

Author

González, María Paula, Chesñevar, Carlos Iván, Collazos, Cesar A., Simari, Guillermo R., 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, Haake, Jörg M., editor, Ochoa, Sergio F., editor, and Cechich, Alejandra, editor

Published
2007
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9. Modelling Power and Trust for Knowledge Distribution: An Argumentative Approach

Author

Chesñevar, Carlos Iván, Brena, Ramón F., Aguirre, José Luis, 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, Gelbukh, Alexander, editor, de Albornoz, Álvaro, editor, and Terashima-Marín, Hugo, editor

Published
2005
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17. El comercio electrónico en la era de los bots

Author

Chesñevar, Carlos Iván and Estevez, Elsa Clara

Subjects
purl.org/becyt/ford/1 [https], GOBIERNO, COMERCIO ELECTRÓNICO, BOTS, Ciencias de la Computación e Información, INTELIGENCIA ARTIFICIAL, purl.org/becyt/ford/1.2 [https], CIENCIAS NATURALES Y EXACTAS, Ciencias de la Computación
Abstract

El comercio electrónico está ingresando en una nueva era con la generalizaciónde bots. cómo estos instrumentos se utilizan para facilitarfunciones relevantes que soportan operaciones comerciales a travésde internet, el marketing direccionado para venta en línea y el soporteempresarial hacia clientes y potenciales compradores en el proceso deventa y posventa. Fil: Chesñevar, Carlos Iván. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias e Ingeniería de la Computación. Universidad Nacional del Sur. Departamento de Ciencias e Ingeniería de la Computación. Instituto de Ciencias e Ingeniería de la Computación; Argentina Fil: Estevez, Elsa Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias e Ingeniería de la Computación. Universidad Nacional del Sur. Departamento de Ciencias e Ingeniería de la Computación. Instituto de Ciencias e Ingeniería de la Computación; Argentina

Published
2018

18. Assessing communication strategies in argumentation-based negotiation agents equipped with belief revision

Author

Casali, Ana, Pilotti, Pablo Emiliano, and Chesñevar, Carlos Iván

Subjects
COMMUNICATION STRATEGIES, Ciencias de la Computación e Información, BELIEF REVISION, ARGUMENTATION-BASED NEGOTIATION, CIENCIAS NATURALES Y EXACTAS, COLLABORATIVE AGENTS, Ciencias de la Computación
Abstract

The importance of negotiation has increased in the last years as a relevant interaction to solve conflicts in multiagent systems. Although there are many different scenarios, a typical negotiating situation involves two cooperative agents that cannot reach their goals by themselves because they do not have some resources needed to reach such goals. Therefore, a way to improve their mutual benefit is to start a negotiation dialogue, taking into account that they might have incomplete or incorrect beliefs about the other agent´s goals and resources. The exchange of arguments during the negotiation gives them information that makes it possible to update their beliefs and consequently they can offer proposals which are closer for reaching a deal. In order to formalize their proposals in a negotiation setting, the agents must be able to generate, select and evaluate arguments associated with such offers, updating their mental state accordingly. We situate our work on this kind of scenarios with two argumentation-based negotiation agents equipped with belief revision operations in the generation and interpretation of arguments. It has been proved that those agents that take advantage of belief revision during the negotiation achieve an overall better performance. Because the belief revision process depends on the information the agents exchange in their utterances, in this paper we focus on different communication strategies the agents may implement and the impact that they have in the negotiation process. For this purpose, we present a negotiation protocol where the messages are extended to include a critique to the last proposal received and a counterproposal. Also, we define proposals that may be more or less informative containing different justifications. An intentional agent architecture is proposed and following this model different kind of negotiating agents are created using diverse communication strategies. To assess the impact these strategies have in the negotiation process some simulations are conducted, analyzing the results obtained. Fil: Casali, Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Centro Internacional Franco Argentino de Ciencias de la Información y de Sistemas. Universidad Nacional de Rosario. Centro Internacional Franco Argentino de Ciencias de la Información y de Sistemas; Argentina Fil: Pilotti, Pablo Emiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Centro Internacional Franco Argentino de Ciencias de la Información y de Sistemas. Universidad Nacional de Rosario. Centro Internacional Franco Argentino de Ciencias de la Información y de Sistemas; Argentina Fil: Chesñevar, Carlos Iván. Universidad Nacional del Sur. Departamento de Ciencias e Ingeniería de la Computación. Instituto de Ciencias e Ingeniería de la Computación; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina

Published
2016

19. A defeasible logic programming approach to the integration of rules and ontologies

Author

Gómez, Sergio Alejandro, Chesñevar, Carlos Iván, and Simari, Guillermo Ricardo

Subjects
TK7885-7895, description logics, Computer engineering. Computer hardware, semantic web, Logic Programming, Electronic computers. Computer science, Ciencias Informáticas, ontologies, QA75.5-76.95, defeasible logic programming, defeasible argumentation
Abstract

The Semantic Web is a vision of the current Web where resources have exact meaning assigned in terms of ontologies, thus enabling agents to reason about them. As inconsistencies cannot be treated by standard reasoning approaches, we use Defeasible Logic Programming (DeLP) to reason with possibly inconsistent ontologies. In this article we show how to integrate rules and ontologies in the Semantic Web. We present an approach that can be used to suitably extend the SWRL standard by incorporating classical and default negated literals in SemanticWeb rules in the presence of incomplete and possibly inconsistent information. The rules and ontologies will be interpreted as a DeLP program allowing the rules to reason on top of a set of (possibly inconsistent) ontologies., Facultad de Informática

Published
2010

20. Defeasible argumentation over relational databases

Author

Deagustini, Cristhian Ariel David, primary, Fulladoza Dalibón, Santiago Emanuel, additional, Gottifredi, Sebastián, additional, Falappa, Marcelo Alejandro, additional, Chesñevar, Carlos Iván, additional, and Simari, Guillermo Ricardo, additional

Published
2017
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22. HLMC

Author

Goron, Anca, primary and Chesñevar, Carlos Iván, additional

Published
2016
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29. Modelling Shared Knowledge and Shared Knowledge Awareness in CSCL Scenarios Through Automated Argumentation Systems.

Author

Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Pandu Rangan, C., Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Haake, Jörg M., Ochoa, Sergio F., Cechich, Alejandra, González, María Paula, and Chesñevar, Carlos Iván

Abstract

Over the last few years, argumentation systems have been gaining increasing importance in several areas of Artificial Intelligence, mainly as a vehicle for facilitating rationally justifiable decision making when handling incomplete and potentially inconsistent information. Argumentation provides a sound model for dialectical reasoning, which underlies discussions among students when solving tasks collaboratively in a CSCL environment. In this setting, we identify the problem of constructing Shared Knowledge and its related Shared Knowledge Awareness. While Shared Knowledge refers to the common knowledge students acquire when they work in a collaborative activity, Shared Knowledge Awareness is associated with the consciousness on the Shared Knowledge that a particular student has. This paper presents a novel approach to model Shared Knowledge construction and the associated Shared Knowledge Awareness through an automated argumentation system. [ABSTRACT FROM AUTHOR]

Published
2007
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30. Modelling Power and Trust for Knowledge Distribution: An Argumentative Approach.

Author

Gelbukh, Alexander, Albornoz, Álvaro, Terashima-Marín, Hugo, Chesñevar, Carlos Iván, Brena, Ramón F., and Aguirre, José Luis

Abstract

Knowledge and Information distribution, which is one of the main processes in Knowledge Management, is greatly affected by power explicit relations, as well as by implicit relations like trust. Making decisions about whether to deliver or not a specific piece of information to users on the basis of a rationally justified procedure under potentially conflicting policies for power and trust relations is indeed a challenging problem. In this paper we model power relations, as well as delegation and trust, in terms of an argumentation formalism, in such a way that a dialectical process works as a decision core, which is used in combination with the existing knowledge and an information distribution system. A detailed example is presented and an implementation reported. Keywords: Argumentation, reputation, knowledge distribution, multiagent systems, trust. [ABSTRACT FROM AUTHOR]

Published
2005
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39. Reasonably Rational: Reasoning about Reasons Behind Preferences Using Modal Logic

Author

Pedersen, Truls, Dyrkolbotn, Sjur, Ågotnes, Thomas, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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40. Human Interactions in Electronic Institutions

Author

de Jonge, Dave, Rosell, Bruno, Sierra, Carles, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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41. ArgCBROnto: A Knowledge Representation Formalism for Case-Based Argumentation

Author

Heras, Stella, Botti, Vicente, Julián, Vicente, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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42. A Multi-agent Approach to Energy-Aware Wireless Sensor Networks Organization

Author

del Carmen Delgado-Roman, M., Sierra, Carles, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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43. An Empirical Evaluation of Geometric Subjective Logic Operators

Author

Cerutti, Federico, Toniolo, Alice, Oren, Nir, Norman, Timothy J., 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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44. Lifecycle of Adaptive Agreements: A Pattern Language

Author

Pérez-Sotelo, J. Santiago, Cuesta, Carlos E., Billhardt, Holger, Ossowski, Sascha, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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45. Reasoning about Choice

Author

van der Hoek, Wiebe, Troquard, Nicolas, Wooldridge, Michael, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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46. Efficient Web Service Discovery Using Hierarchical Clustering

Author

Cong, Zijie, Fernández Gil, Alberto, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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47. e COOP: Privacy-Preserving Dynamic Coalition Formation for Power Regulation in the Smart Grid

Author

Mihailescu, Radu-Casian, Klusch, Matthias, Ossowski, Sascha, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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48. A First Approach to Mining Opinions as Multisets through Argumentation

Author

Chesñevar, Carlos I., González, María Paula, Grosse, Kathrin, Maguitman, Ana Gabriela, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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49. Argumentation Theoretic Foundations for Abstract Dependence Networks

Author

Caire, Patrice, van der Torre, Leendert, Villata, Serena, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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50. Extracting Reputation with Knock-Out Tournament-Based Pairwise Elicitation in Complex Social Networks

Author

Centeno, Roberto, Hermoso, Ramón, Fasli, Maria, 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, Chesñevar, Carlos Iván, editor, Onaindia, Eva, editor, Ossowski, Sascha, editor, and Vouros, George, editor

Published
2013
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