Agent-Mediated Pro-active Web-Sites -- Learning to Use Referrals to Select Satisficing Service Providers -- Towards an Emotional Decision-Making -- A Self-adapting System Generating Intentional Behavior and Emotions -- A New Parameter for Maintaining Consistency in an Agent's Knowledge Base Using Truth Maintenance Systems -- Mind Out of Programmable Matter: Exploring Unified Models of Emergent Autonomy -- Characterizing Environmental Information for Monitoring Agents -- Towards a Model Level Debugger for the Cougaar Model Driven Architecture System -- Can Agent Oriented Software Engineering Be Used to Build MASs Product Lines? -- Towards Dynamic Electronic Institutions: From Agent Coalitions to Agent Institutions -- Institutionalization Through Reciprocal Habitualization and Typification -- On the Concept of Agent in Multi-robot Environment -- An Approach for Autonomy: A Collaborative Communication Framework for Multi-agent Systems -- Autonomy Without Independence: Animal Training as a Model for Robot Design -- Shaping the Future of Online Payment Processing: An Autonomic Approach Applied to Intelligent Payment Brokers -- Genetically Modified Software: Realizing Viable Autonomic Agency -- Harnessing Self-modifying Code for Resilient Software -- Oracle: An Agent-Based, Reference Architecture -- Hierarchies, Holons, and Agent Coordination -- A Systemic Framework for Open Software Agents -- Hybrid System Reachability-Based Analysis of Dynamical Agents -- Distributed Agent Evolution with Dynamic Adaptation to Local Unexpected Scenarios -- Run-Time Agents as a Means of Reconciling Flexibility and Scalability of Services -- Concept and Sensor Network Approach to Computing: The Lexicon Acquisition Component -- An Agent Based Hybrid Analog-Digital Robotic Sensor Web Meta-system -- HarnessingAgent-Based Games Research for Analysis of Collective Agent Behavior in Critical Settings -- Defining Agents Via Strategies: Towards a View of MAS as Games -- Secure Mobile Agent Deployment and Communication Towards Autonomous Semantic Grid -- A System Theory Approach to the Representation of Mobile Digital Controllers Agents -- Towards Adaptive Migration Strategies for Mobile Agents -- Agent Modeling of Tetrahedron-Based Structures -- Congestion Control in Multi-Agent Systems Through Dynamic Games of Deterrence -- Radical Concepts for Self-managing Ubiquitous and Pervasive Computing Environments -- Survivable Security Systems Through Autonomicity.

The second WRAC, NASA/IEEE Workshop on Radical Agent Concepts, was held at NASA Goddard Space Flight Center, Greenbelt, MD, September 20-22, 2005. The workshop was sponsored by the Information Systems Division of NASA Goddard and IEEE Computer Society Technical Committee on Complexity in Computing and IEEE Task Force on Autonomous and Autonomic Systems. The workshop also received generous financial support from IBM, without which the workshop would not have been possible. Agent technology, along with autonomous and autonomic computing, has emerged as a major field in computing, and will greatly influence the future development of complex computer-based systems. The area of research is strongly influenced by the autonomic computing initiative as well as by developments in biologically inspired computing, and involves interdisciplinary interaction from those involved in research in social intelligence, psychology, arts, biology, computer science, computer communications and philosophy. This volume includes revised versions of papers presented at the workshop. The workshop was structured so as to allow adequate time for discussion and interaction, to exchange ideas and reflect on the motivations, scientific grounds and practical consequences of the concepts presented. Many of the ideas are truly "radical", and so authors were given time to revise their papers to reflect further thoughts on the ideas presented and to reflect feedback received at the workshop. We are grateful to Jeff Kephart for a very interesting keynote speech describing IBM's current and future work in this field, which fit very well with the aims and scope of the workshop.