Papers by Hiromitsu Hattori
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters - WWW Alt. '04, 2004
In this paper, we propose a Web based information sharing system called the Proxy Agent-based Inf... more In this paper, we propose a Web based information sharing system called the Proxy Agent-based Information Sharing (PAIS). We also developed a writable Web mechanism called Web browser-based Direct Editing (Wedit), that is a major component of PAIS. Wedit enables public users to effectively edit HTML text on an existing Web browser. Since Wedit was developed with conventional technologies, users quickly learn how to use it. PAIS is implemented by using Wedit and a proxy agent. PAIS enables users to share information via Web pages using Wedit. The proxy agent maintains users' editing data. The agent autonomously sends its user's modification data to other agents in the same community.
2007 IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT'07), 2007
Multi-issue negotiations are a central component of many important coordination challenges. Almos... more Multi-issue negotiations are a central component of many important coordination challenges. Almost all previous work in this area has assumed that negotiation issues are independent, making it relatively easy to find high-quality agreements. In many real-world problem domains, however, issues are interdependent, making hard to find good agreement due to the nonlinearity of the agent's utility functions. The key challenge, in this context, is finding high-quality agreements without making unrealistic demands concerning how much agents reveal about their utilities. In this paper, we propose a protocol wherein the negotiating agents, working with the mediator, progress through a multi-phase narrowing of the space of possible agreements. We show that our method outperforms existing methods in large nonlinear utility spaces, and is computationally feasible for negotiations with as many as ten agents.
Lecture Notes in Computer Science, 2008
The award papers were selected by the Program Committee of the annual conference of JSAI (Japan S... more The award papers were selected by the Program Committee of the annual conference of JSAI (Japan Society for Artificial Intelligence) 2006. The paper selection of each co-located international workshop was made by the Program Committee of each workshop. Upon the decisions of the paper awards and the paper selections, each chapter was edited by the Program Chairs of the 20th annual JSAI conference and the co-located international workshops. The entire contents and structure of the book were managed and edited by the chief editors.
Because of the increasing sophistication of Internet auctions, a user can participate in many dif... more Because of the increasing sophistication of Internet auctions, a user can participate in many different auctions held around the world, each of which offers a wide variety of items. In this paper, we present multiple-bidding support framework based on multiagent system, which can support bidding and browsing information. To extract information on items from real-life Internet auction sites, we implement a Web wrapper component which can be connected with a template generator. In this paper, we present a process of generating a template.
Proceedings of the National Academy of Sciences, 2010
How the biochemical reactions that lead to the repair of DNA damage are controlled by the diffusi... more How the biochemical reactions that lead to the repair of DNA damage are controlled by the diffusion and availability of protein reactants within the nucleoplasm is poorly understood. Here, we use gene targeting to replace Brca2 (a cancer suppressor protein essential for DNA repair) with a functional enhanced green fluorescent protein (EGFP)-tagged form, followed by fluorescence correlation spectroscopy to measure Brca2-EGFP diffusion in the nucleoplasm of living cells exposed to DNA breakage. Before damage, nucleoplasmic Brca2 molecules exhibit complex states of mobility, with long dwell times within a sub-fL observation volume, indicative of restricted motion. DNA damage significantly enhances the mobility of Brca2 molecules in the S/G2 phases of the cell cycle, via signaling through damage-activated protein kinases. Brca2 mobilization is accompanied by increased binding within the nucleoplasm to its cargo, the Rad51 recombinase, measured by fluorescence cross-correlation spectroscopy. Together, these results suggest that DNA breakage triggers the redistribution of soluble nucleoplasmic Brca2 molecules from a state of restricted diffusion, into a mobile fraction available for Rad51 binding. Our findings identify signal-regulated changes in nucleoplasmic protein diffusion as a means to control biochemical reactions in the cell nucleus.
In this paper, we develop a new method for finding the optimal bidding strategy in sequential auc... more In this paper, we develop a new method for finding the optimal bidding strategy in sequential auctions, using a dynamic programming technique. The existing method assumes that the utility of a user is represented in an additive form. From this assumption, the remaining endowment of money must be explicitly represented in each state, and the calculation of the optimal bidding strategy becomes time-consuming when the initial endowment of money m becomes large.
Exploring key challenges of urban informatics research and development, this workshop looks at co... more Exploring key challenges of urban informatics research and development, this workshop looks at concepts, research methods and instruments that become the microscope of urban anatomy. We want to discuss urban informatics systems that provide real-time tools for examining the real-time city, to picture the invisible and to zoom into a fine-grained resolution of urban environments that reveal the depth and contextual nuances of urban metabolism processes at work.
ABSTRACT In this position paper, we introduce the idea of using emotions as a mediator between hi... more ABSTRACT In this position paper, we introduce the idea of using emotions as a mediator between high-level planning and reactive behavior for multiagent-based simulation of driving. After reviewing motiva-tions and arguing for the importance of our approach, we focus on a simple case, ...
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Papers by Hiromitsu Hattori