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A multiagent system, conceptually, is often explained in terms of a collection of agents, each of which is loosely connected with each other via Internet/Intranet and possesses the capabilities claimed such as autonomy, adaptation, and cooperation using speech acts like KQML. The agent-view of software is indeed very powerful and will keep attracting more and more people into this fantasy. But years...
A next generation distributed system is expected to be flexible in the sense that the system is able to deal with various changes of both the users’ requirements and the operational conditions of system’s environment. The aim of our research is to establish a new design methodology of the flexible distributed systems based on agent-based computing technology. To do so, we propose an agent-based distributed...
In this paper, we present a conceptual model and the associated framework that can be used to model and implement MASs simulation based on a core concept: the Role. We especially assume that collective agent structures, such as groups and organizations gain to be represented through the concept of Role. We first provide a formal specification of the role concept. Then we show how this concept can...
Agents for real applications often operate in complex, dynamic, and nondeterministic environments and thus need to function in worlds with exogenous events, other agents, and uncertain effects. In this paper, we present our reactive agent view to describe agents for real-world applications and introduce our two agent architectures: UM-PRS and Jam. UM-PRS has been applied to both physical robots and...
For the efficient and informative coordination of multiple agents, a time-bounded agent negotiation framework is proposed utilizing time-based commitment scheme. By attaching the commitment duration to agent messages, the traditional Contract Net Protocol is extended to a time-bounded environment, thereby giving rise to a Time-Bounded Negotiation Framework (TBNF). The proposed negotiation framework...
Game theoretic decision making is a practical approach to multi-agent coordination. Rational agents may make decisions based on different principles of rationality assumptions that usually involve knowledge of how other agents might move. After formulating a game matrix of utility entries of possible combination of moves from both agents, agents can reason which combination is the equilibrium. Most...
This work explores the benefits of using user models for plan recognition problems in a real-world application. Interface agents are designed for the prediction of resource usage in the UNIX domain using a stochastic approach to automatically acquire regularities of user behavior. Both sequential information from the command sequence and relational information such as system’s responses and arguments...
In this paper, we present Organic Agents for Software and Intelligent Systems (OASIS) as a original agents coordination framework. OASIS is based on expertises for building multi-agent system in defined environments. We introduce the agent/environment interaction modeling and implementation. We describe several coordination techniques such as the negotiation with heuristics in multi-agent planning,...
As information available over the Web grows, so does the need for more effective retrieval tools. In this paper we describe three information retrieval agents currently being developed at the National Taiwan University. While each agent serves a different purpose, they share the common feature of incorporating the need of the users. In other words, all three agents offer personalized services. The...
The WWW is a most popular service on the Internet and a huge number of WWW information sources are available. Conventionally we access WWW information sources one by one by using a browser, but WWW information integration gives a unified view to users by integrating multiple WWW information sources elaborately. In this paper, we introduce our single-agent and multi-agent approaches to WWW information...
Networked computing has drastically changed the way in which people work and exchange information. Although the standard client-server architecture enables sharing of common resources among multiple users, it is non-trivial to share computational resources over the network. In this paper, we present a client-agent-server framework for integrating intranet services in satisfying complex informational...
Mobile devices usually have too limited and expensive communication capacity to meet consistent connection requirement of online payment protocols such as SET. Mobile agent approaches have been proposed by SET/A and SET/A+ to solve the problem. In this paper, we propose a new secure agent-mediated payment scheme which provides simpler and more compatible solution. Its particular features lie at: (1)...
In this paper we present a secure communication scheme for multiagent systems. First, we briefly introduce an architecture for multiagent systems, and discuss security problems with such systems. We then present the communication scheme in detail, including the mathematical principle and the cryptographic protocol. To further demonstrate how our communication scheme works, we present an example with...
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