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Changes and adaptations are always necessary after the deployment of a multi-agent system (MAS), as well as of any other type of software systems. Some of these changes may be simply perfective and have local impact only. However, adaptive changes to meet new situations in the operational environment of the MAS may impact globally on the overall design. More specifically, those changes usually affect the organizational structure of the MAS. In this paper we analyze the issue of design change/adaptation in a MAS organization, and the specific problem of how to properly model/design a MAS so as to make it ready for adaptation. Special attention is paid to the Gaia methodology, whose suitability in dealing with adaptable MAS organizations is also discussed with the help of an illustrative application example.

When dealing with non-trivial social systems, Multi-Agent Based Simulation (MABS) makes it possible to model and simulate social aspects without neglecting articulated motivations, decisions and behaviours by individuals. In this paper, we experiment with the simulation of a peculiar sort of social system — namely, Medieval Battles — by using general-purpose agent methodologies and technologies — namely, SODA and TuCSoN — in order to better understand and emphasise the benefits of MABS in the simulation of social systems.

An artefact for MASs is an entity not driven by an inner goal (as agents are), but used by agents to achieve their own goals. In this paper, we assume agents and artefacts as first-class entities in MAS engineering, and claim that agent-oriented methodologies should exploit these two abstractions as the basic bricks for the whole engineering process. As a

An agent organization model is proposed based on four main concepts: organizational unit, service, environment and norm. These concepts are integrated in ANEMONA meta-models, which are extended in order to include all entities needed for describing the structure, functionality, dynamic, normalization and environment of an organization.

Abstract. Many methodologies appeared in the latest years to deal with multi-agent systems complexity and special development requirements. Each methodology focuses in certain aspects of multi-agent systems de-velopment and use different case studies to prove their math capabilities or translate languages. In Brazil, and probably others america latin countries, young and old people lose their confidential archives (ex.: photos, arts, academic production = money... = articles that confirm this hypothesis) even know what they do with it. ( cultural domination). In anouncements, private site can sells informations or even confidential itens, Laws that aim in Brazil (exemaples) =:》 compaire to others america latin countries and Europa or asia.

We describe how prototype systems can be efficiently created from agent-oriented domain and design models. We first propose a conceptual space that accommodates model transformations described by the Model-Driven Architecture. We then explain agent-oriented domain models and platform- independent design models and show how the first can be transformed into the latter. We also demonstrate how design models can be

As agent-oriented paradigm is reaching a significant level of acceptance by software developers, there is a lack of integrated high-level abstraction tools for the design and development of agent-based applications. In an effort to mitigate this deficiency, we introduce Agent Academy, an integrated development framework, implemented itself as a multi-agent system, that supports, in a single tool, the design of agent behaviours and reusable agent types, the definition of ontologies, and the instantiation of single agents or multi-agent communities. In addition to these characteristics, our framework goes deeper into agents, by implementing a mechanism for embedding rule-based reasoning into them. We call this procedure “agent training” and it is realized by the application of AI techniques for knowledge discovery on application-specific data, which may be available to the agent developer. In this respect, Agent Academy provides an easy-to-use facility that encourages the substitution of existing, traditionally developed applications by new ones, which follow the agent-orientation paradigm.