Roberto Centeno

Learn More
The problem of selecting correct counterparts to interact with is of particular relevance in open and dynamic environments. This problem increases when third parties may vary their behaviour at will. In this paper we examine the problem of service provider selection using trust and reputation techniques. Most approaches to service provider selection are(More)
In this paper, we propose a general formal framework for organising multiagent systems whose participants are rational agents. This model is based on the idea of <i>organisational mechanisms</i>. These are mechanisms introduced in a multiagent system with the aim of influencing the behaviour of the agents towards more effectiveness with regard to some(More)
This paper provides a brief overview of the field of coordination in multiagent systems, and outlines its relation to current efforts working towards a paradigm for smart, next-generation distributed systems, where coordination is based on the concept of agreement between computational entities. Two examples are provided to visualize the types of mechanisms(More)
The global objective of open multiagent systems might be in conflict with individual preferences of rational agents participating in such systems. Addressing this problem, we propose a mechanism able to attach incentives to agent actions such that the global utility of the system is improved. Such incentives are dynamically adjusted to each agent’s(More)
This work presents an adaptive sanctioning mechanism that can be applied in open multi-agent systems that are regulated through norms. This mechanism tries to identify the attributes of the environment that have some influence on agents decision making and uses such attributes to define sanctions that may prevent norm violations. Our approach adapts(More)
Trust and reputation systems are not only useful for Virtual Organisations (VOs), but VOs also for trust and reputation mechanisms. The structure provided by a VO can be used to construct more effective trust mechanisms. In particular, the structural elements defined in a VO (e.g., roles and interactions) provide a certain notion of similarity which allows(More)
In the emerging field of m-Health, advanced applications provide healthcare to people anywhere, anytime using broadband and wireless communications, as well as mobile computing devices. The notion of Service-Oriented Multi-Agent Systems (SOMAS) that has recently been proposed appears to adequately capture the requirements of applications in this field. The(More)
In this paper we present a hybrid reputation model focused on organizational structures that attempts to solve problems associated with both centralized and decentralized reputation models. Agents in our approach are able not only to evaluate the behavior of others and store reputations values but also to send such information to a centralized mechanism and(More)