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IEEE International Symposium on Parallel and Distributed Processing With Applications

作者： De Freitas, Edison Pignaton Heimfarth, Tales Pereira, Carlos Eduardo Ferreira, Armando Morado Wagner, Flávio Rech Larsson, Tony School of Information Science Computer and Electrical Engineering Halmstad University Halmstad Sweden Institute of Informatics Federal University of Rio Grande do Sul Porto Alegre Brazil Computer Science Department Federal University of Lavras Lavras Brazil Defense Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil

ISBN: (纸本)9780769541907

This paper presents a comparison among different strategies to coordinate the use of heterogeneous wireless sensors aimed for area surveillance. The heterogeneity among the sensor nodes is related to their sensing and mobility capabilities. The goal of the strategies is to provide coordination among the different nodes, in order to make the wireless sensor network perform its missions with higher efficiency. Strategies combine advantages of bio-inspired and utility-based approaches to coordination. Simulations of scenarios with different characteristics were performed and the results are compared and analyzed. © 2010 IEEE.

关键词： Sensor nodes

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Empirical Studies on Application of Genetic Algorithms and Ant Colony Optimization for Data Clustering

Empirical Studies on Application of Genetic Algorithms and A...

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Computer Science Society (SCCC) International Conference Chilean FLAGGED

作者： Thelma Elita Colanzi Wesley Klewerton Guez Assunção Aurora Trinidad Ramirez Pozo Ana Cristina B. Kochem Vendramin Diogo Augusto Barros Pereira Computer Science Postgraduate Program Federal University of Paraná (UFPR) Curitiba Paraná Brazil Graduate School of Electrical Engineering and Computer Science (CPGEI) Federal Technological University of Paraná (UTFPR) Curitiba Paraná Brazil Informatics Department (DAINF)

Cluster analysis is used in several research areas to classify data sets in groups by their similar characteristics. Metaheuristic-based techniques, such as Genetic Algorithms (GAs) and Ant Colony Optimization (ACO), have been applied in order to increase the clustering algorithm performance. GA and ACO-based clustering algorithms are capable of efficiently and automatically forming natural groups from a pre-defined number of clusters. This paper presents a GA and an ACO algorithm to the clustering problem. Both algorithms were refined using local search in order to improve the clustering accuracy. The results are compared on numeric UCI databases.

关键词： Clustering algorithms Search problems Equations Mathematical model Gallium Genetic algorithms Memetics

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Communicating with multiple users for embodied conversational agents in quiz game context

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International Journal of Intelligent Information and Database Systems 2010年第6期4卷 579-598页

作者： Huang, Hung-Hsuan Furukawa, Takuya Ohashi, Hiroki Nishida, Toyoaki Cerekovic, Aleksandra Pandzic, Igor S. Nakano, Yukiko Graduate School of Informatics Kyoto University Yoshida-Honmachi Sakyo-ku Kyoto 606-8501 Japan Faculty of Electrical Engineering and Computing Department of Telecommunications University of Zagreb Unska 3 10000 Zagreb Croatia Department of Computer and Information Science Seikei University Kichijyoji Kita-machi 3-3-1 Musashino-shi Tokyo 180-8633 Japan

This paper presents two approaches to achieve attentiveness of a virtual quiz agent in the interactions with multiple users at the same time. One attempts to improve the agent with an utterance strategy to determine whether, when, and whom to suggest the users the availability of hints or to urge the users to answer. In the other one, a transition state model presenting the agent's attitude that allows the agent to perform meaningful idle motions is introduced. The transition model is obtained in a Wizard-of-Oz (WOZ) experiment and is learned with support vector machine (SVM). These two prototype systems are evaluated with an automatic attitude test, go/no-go task (GNAT) and regular questionnaires. From the joint results of the evaluation subject experiments, the direction of finding an appropriate triggering timing of the agent's behaviours is proved to be effective. Copyright © 2010 Inderscience Enterprises Ltd.

关键词： Support vector machines

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Toward a multi-culture adaptive virtual tour guide agent with a modular approach

Toward a multi-culture adaptive virtual tour guide agent wit...

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作者： Huang, Hung-Hsuan Cerekovic, Aleksandra Pandzic, Igor S. Nakano, Yukiko Nishida, Toyoaki Graduate School of Informatics Kyoto University Kyoto Japan Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia Faculty of Science and Technology Seikei University Seikei Japan

Embodied conversational agents (ECAs) are computer-generated, human-like characters that interact with human users in face-to-face conversations. ECA is a powerful tool for representing cultural differences and is suitable for interactive training or edutainment systems. This article presents preliminary results from the development of a culture-adaptive virtual tour guide agent for serving Japanese, Croatian, and general Western users by displaying appropriate verbal and non-verbal behaviors. It is being implemented in Generic ECA Framework, a modular framework for developing ECAs. Dividing the ECA functions into reusable and loosely coupled modules minimizes the effort required to implement additional behavior and facilitates incremental scale up of the system. © Springer-Verlag London Limited 2009.

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Implementing a multi-user tour guide system with an embodied conversational agent

Implementing a multi-user tour guide system with an embodied...

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5th International Conference on Active Media Technology, AMT 2009

作者： Čereković, Aleksandra Huang, Hsuan-Hung Furukawa, Takuya Yamaoka, Yuji Pandžić, Igor S. Nishida, Toyoaki Nakano, Yukiko Faculty of Electrical Engineering and Computing Zagreb Croatia Graduate School Informatics Kyoto University Japan Dept. of Computer and Information Science Faculty of Science and Technology Seikei University Tokyo Japan

ISBN: (纸本)9783642048746

In recent years, computer-generated interactive virtual characters, called Embodied Conversational Agents (ECAs), are subjects of considerable ongoing research. Nevertheless, their conversational abilities are mediocre compared to real human behaviors. Among limitations, most of ECAs are incapable of participating in natural conversations in which the number of participants can change dynamically. In the ongoing work we investigate principles of integrating a multi-user support in an ECA system. We present experiments and implementation approach of a prototype system in which a tour guide ECA interacts with one or two users. The system combines different technologies to detect and address the system users and draw their attention. Experimental interaction with the system produces encouraging results. The system can address the user's appearance, departure, decreased level of interest and identify his conversational role. © 2009 Springer-Verlag.

关键词： Behavioral research

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Improvement of convergence characteristic in nonlinear transient eddy-current analyses using the error correction of time integration based on the time-periodic FEM and the EEC method

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IEEJ Transactions on Power and Energy 2009年第6期129卷 7+791-798页

作者： Takahashi, Yasuhito Tokumasu, Tadashi Fujita, Masafumi Wakao, Shinji Iwashita, Takeshi Kanazawa, Masanori Graduate School of Informatics Kyoto University Yoshida-Honmachi Sakyo-ku Kyoto 606-8501 Japan Toshiba Corporation Power Systems Company 2-4 Suehiro-cho Tsurumi-ku Yokohama 230-0045 Japan Dept. of Electrical Engineering and Bioscience Waseda University 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan Academic Center for Computing Media Studies Kyoto University Yoshida-Honmachi Sakyo-ku Kyoto 606-8501 Japan

This paper proposes novel techniques for the improvement of the convergence characteristic of step-by-step time integrations in nonlinear transient eddy-current analyses. The proposed methods, which are based on the time-periodic finite-element method and the explicit error correction method, can extract poorly-converged error components corresponding to large time constants of an analyzed system. The correction of the extracted error components accelerates the convergence of transient calculation efficiently. Furthermore, we extend the performance of the proposed methods in nonlinear problems. Some numerical results that verify the effectiveness of the proposed methods are also presented. © 2009 The Institute of electrical Engineers of Japan.

关键词： Nonlinear analysis

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Communicating with multiple users for embodied conversational agents

Communicating with multiple users for embodied conversationa...

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International Conference on Telecommunications (ConTEL)

作者： H.H. Huang A. Cerekovic T. Furukawa Y. Yamaoka H. Ohashi I. Pandzic Y. Nakano T. Nishida Graduate School of Informatics Kyoto University Japan Paculty of Electrical Engineering and Computing University of Zagreb Croatia Department of Computer Information and Communication Sciences Tokyo University of Agriculture and Technology Japan Department of Computer and Information Science Seikei University Japan

One of the most critical reason that prevents embodied conversational agents to be used in practical applications can be considered as the lack of the capabilities to be aware of multiple users and to interact with them. This paper presents our investigations in an advanced tour guide agent system serving two users and a simpler quiz agent kiosk which is developed for public exhibitions. To improve the life likeness of the agents, we propose that the agent should be attentive to its users. To achieve the agent's attentiveness toward the users, two aspects are considered: its utterance strategy toward the users and its internal attitude should be adaptive to users' status. To explore these two aspects more throughly, two prototype systems are implemented and evaluated with subject experiments respectively. In addition to regular questionnaires evaluation, GNAT test that measures implicit preference was conducted as well. The preliminary results implied that the experiment participants perceived that the agents are attentive and natural.

关键词： Testing Humans Laboratories informatics Agriculture Information science Application software Prototypes Robustness Working environment noise

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The design of a generic framework for integrating ECA components

The design of a generic framework for integrating ECA compon...

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7th International Joint Conference on Autonomous Agents and Multiagent Systems, AAMAS 2008

作者： Huang, Hung-Hsuan Nishida, Toyoaki Cerekovic, Aleksandra Pandzic, Igor S. Nakano, Yukiko Graduate School of Informatics Kyoto University Japan Faculty of Electrical Engineering and Computing University of Zagreb Croatia Department of Computer Information and Communication Sciences Tokyo University of Agriculture and Technology Japan

ISBN: (纸本)9781605604701

Embodied Conversational Agents (EGAs) are life-like computer generated characters that interact with human users in face-to-face multi-modal conversations. ECA systems are generally complex and difficult for individual research groups to develop. Therefore, if there was a common framework for connecting ECA functioning blocks seamlessly to an integrated system, redundant effort can be saved. This paper discusses the issues emerged in developing such a framework and introduces the design and preliminary results of our ongoing project, Generic ECA Framework. Copyright © 2008, International Foundation for Autonomous Agents and Multiagent Systems (***). All rights reserved.

关键词： Multi agent systems

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Design space exploration for a coarse grain accelerator

Design space exploration for a coarse grain accelerator

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2008 Asia and South Pacific Design Automation Conference, ASP-DAC

作者： Mehdipour, Farhad Noori, Hamid Zamani, Morteza Saheb Inoue, Koji Murakami, Kazuaki Research Institute for Information Technology Computing and Communication Center Kyushu University Fukuoka Japan Department of Informatics Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka Japan Department of IT and Computer Engineering Amirkabir University of Technology Tehran Iran

ISBN: (纸本)9781424419227

In the design process of a reconfigurable accelerator employing in an embedded system, multitude parameters may result in remarkable complexity and a large design space. Design space exploration as an alternative to the quantitative approach can be employed to find a right balance between the different design parameters. In this paper, a hybrid approach is introduced to analytically explore the design space for a coarse grain accelerator and determine a wise design point exploiting data extracted from applications, quantitatively. It also provides flexibility for taking into account new design constraints as well as new characteristics of applications. Furthermore, this approach is a methodological approach which reduces the design time and results in a point which satisfies the design goals. ©2008 IEEE.

关键词： Design

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Towards an embodied conversational agent talking in Croatian

Towards an embodied conversational agent talking in Croatian

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9th International Conference on Telecommunications, ConTEL 2007

作者： Čereković, Aleksandra Huang, Hung- Hsuan Zorić, Goranka Tarasenko, Kateryna Levačić, Vjekoslav Pandžić, Igor S. Nakano, Yukiko Nishida, Toyoaki Faculty of Electrical Engineering and Computing Zagreb Croatia Graduate School Informatics Kyoto University Japan Department of Computer Information and Communication Sciences Tokyo University of Agriculture and Technology Japan

ISBN: (纸本)9531841101

The advancement of traffic makes world more and more internationalized and increases frequency of communication between people who come from different cultures. Differences in their conversation go beyond the languages they speak to the non-verbal behaviors they express while talking. To improve the abilities of the embodied conversational agents (ECAs) while interacting with human users we are working on the ECA based application, a tour guide of city Dubrovnik that servers visitors in Japanese, Croatian and general western cultures speaking in English. This paper presents the overall architecture and explains possible extension with another culture. It describes issues we met while making agent talk in Croatian and proposed solutions.

关键词： Communication systems

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