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This paper presents a distributed agent-based server architecture for English auctions. Bids of auction participants are handled by a hierarchical organization of agents that can be efficiently distributed on a computer network. This approach avoids the bottlenecks of bid processing that might occur during periods of heavy bidding, like for example snipping. We present experimental results that show...
In this paper we explore the use of F#, a functional language, as a means of developing distributed multi-agent systems. In order to achieve this goal, we started with the implementation of the MapReduce algorithm. We also implemented the algorithm in JADE, hence allowing for an initial comparison of the language-platform combination from an usability point of view with respect to the development...
In this paper we provide experimental results concerning the impact of the negotiation protocol onto the quality of the negotiation outcome as well as onto the communication complexity of interactions incurred during one-to-many automated negotiations. We evaluate experimentally three negotiation protocols (Direct Task Assignment, Contract Net and Iterated Contract Net) with respect to two performance...
Business process modeling is performed during the requirements analysis and specification of business software systems. Checking qualitative aspects of business processes is required for quality assurance, as well as for compliance with non-functional requirements. We show how business process models represented as Role Activity Diagrams can be formally checked using process algebras and temporal...
Negotiation with interdependent issues and nonlinear, non-monotonic utility functions is difficult because it is hard to efficiently explore the contract space. This paper presents a new result in automated negotiations with interdependent issues, complete information and time constraints. We consider that agents express their preferences using constraints defined as one interval per issue and that...
Agents are a useful abstraction frequently employed as a basic building block in modeling service, information and resource sharing in global environments. The connecting of requester with provider agents requires the use of specialized agents known as middle-agents. In this paper, we propose a formal framework intended to precisely characterize types of middle-agents with a special focus on matchmakers,...
The paper presents a semantic logging framework which allows structured information logging in an agent-based distributed system for chemical incident response. The logging framework is “semantic” because it allows semantic interpretation of logs according to relationships defined between logging events. For example, this approach could help the reconstruction of the order of events that occurred...
This paper deals with adaptation provisioning with respect to learning styles in a Web-based educational system called WELSA. The novelty of the approach comes from using an integrative set of characteristics extracted from the main learning style models as adaptation criterion, rather than relying on a single learning style model, as most of the related systems do. The paper gives an overview of...
In this paper, we propose a novel class of wrappers (logic wrappers) inspired by the logic prog- ramming paradigm. The developed Logic wrappers (L-wrapper) have declarative semantics, and therefore: (i) their specification is decoupled from their implementation and (ii) they can be generated using inductive logic programming. We also define a convenient way for mapping L-wrappers to XSLT for efficient...
In our previous paper we have established that to develop an extensible agent-based e-commerce system it is necessary to logically separate the negotiation process from other parts of the system. This paper deals with the design of the "negotiation box" - the component that actually runs the negotiation processes. Furthermore, interaction of the negotiation box with the rest of the system...
This paper reports our initial results with the development of a multi-agent distributed system for Web news content syndication. Our proposal builds on a multi-agent platform compliant with FIPA specifications. An initial implementation, design outline and sample experiment are presented
The Web has become a major source of information that is easily accessible at low cost by individual and business consumers. Logic wrappers are a new technology that was proposed to help automate the task of data extraction from the Web. In this paper we present an approach for efficiently implementing logic wrappers with the help of XSLT transformation language. The approach was successfully applied...
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