Agents, Infrastructure, Applications and Norms
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Agents, Infrastructure, Applications and Norms
Michael LuckUniversity of Southampton, UK
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Overview Monday
• Agents for next generation computing AgentLink Roadmap
Tuesday• The case for agents• Agent Infrastructure
Conceptual: SMART Technical: Paradigma/actSMART
• Agents and Bioinformatics GeneWeaver myGrid
Wednesday• Norms• Pitfalls
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Agent Technology: EnablingNext Generation Computing
A Roadmap for Agent Based Computing
Michael Luck, University of Southampton, [email protected]
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Overview
What are agents? AgentLink and the Roadmap Current state-of-the-art Short, medium and long-term
predictions Technical challenges Community challenges Application Opportunities
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What is an agent?
A computer system capable of flexible, autonomous (problem-solving) action, situated in dynamic, open, unpredictable and typically multi-agent domains.
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What is an agent?
A computer system capable of flexible, autonomous (problem-solving) action, situated in dynamic, open, unpredictable and typically multi-agent domains.
control over internal state and over own behaviour
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What is an agent?
A computer system capable of flexible, autonomous (problem-solving) action, situated in dynamic, open, unpredictable and typically multi-agent domains.
experiences environment through sensors and acts through effectors
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What is an agent?
A computer system capable of flexible, autonomous (problem-solving) action, situated in dynamic, open, unpredictable and typically multi-agent domains.
reactive: respond in timely fashion to environmental change
proactive: act in anticipation of future goals
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Multiple Agents
In most cases, single agent is insufficient
• no such thing as a single agent system (!?)
• multiple agents are the norm, to represent: natural decentralisation multiple loci of control multiple perspectives competing interests
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Agent Interactions
Interaction between agents is inevitable• to achieve individual objectives, to manage
inter-dependencies
Conceptualised as taking place at knowledge-level • which goals, at what time, by whom, what for
Flexible run-time initiation and response• cf. design-time, hard-wired nature of extant
approaches
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AgentLink and the Roadmap
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What is AgentLink?
Open network for agent-based computing.
AgentLink II started in August 2000. Intended to give European industry a
head start in a crucial new area of IT. Builds on existing activities from
AgentLink (1998-2000)
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AgentLink Goals
Competitive advantage through promotion of agent systems technology
Improvement in standard, profile, industrial relevance of research in agents
Promote excellence of teaching and training
High quality forum for R&D
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What does AgentLink do?
Industry action• gaining advantage for Euro industry
Research coordination• excellence & relevance of Euro research
Education & training• fostering agent skills
Special Interest Groups• focused interactions
Information infrastructrure• facilitating AgentLink work
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The Roadmap: Aims
A key deliverable of AgentLink II Derives from work of AgentLink SIGs Draws on Industry and Research
workpackages Aimed at policy-makers, funding
agencies, academics, industrialists Aims to focus future R&D efforts
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Special Interest Groups
Agent-Mediated Electronic Commerce Agent-Based Social Simulation Methodologies and Software Engineering
for Agent Systems Intelligent Information Agents Intelligent and Mobile Agents for
Telecoms and the Internet Agents that Learn, Adapt and Discover Logic and Agents
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The Roadmap: Process
Core roadmapping team:• Michael Luck• Peter McBurney• Chris Preist
Inputs from SIGs: area roadmaps Specific reviews Wide consultation exercise Collation and integration
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State of the art
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Views of Agents
To support next generation computing through facilitating agent technologies
As a metaphor for the design of complex, distributed computational systems
As a source of technologies As simulation models of complex real-
world systems, such as in biology and economics
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Agents as Design
Agent oriented software engineering
Agent architectures Mobile agents Agent infrastructure Electronic institutions
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Agent technologies
Multi-agent planning Agent communication languages Coordination mechanisms Matchmaking architectures Information agents and basic ontologies Auction mechanism design Negotiation strategies Learning
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Links to other disciplines
Philosophy Logic Economics Social sciences Biology
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Application and Deployment Assistant agents Multi-agent decision systems Multi-agent simulation systems
IBM, HP Labs, Siemens, Motorola, BT Lost Wax, Agent Oriented Software,
Whitestein, Living Systems, iSOCO
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The Roadmap Timeline
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Dimensions
Sharing of knowledge and goals Design by same or diverse teams Languages and interaction
protocols Scale of agents, users, complexity Design methodologies
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Current situation
One design team Agents sharing common goals Closed agent systems applied in
specific environment Ad-hoc designs Predefined communications
protocols and languages Scalability only in simulation
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Short term to 2005
Fewer common goals Use of semi-structured agent
communication languages (such as FIPA ACL)
Top-down design methodologies such as GAIA
Scalability extended to predetermined and domain-specific environments
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Medium term 2006-2008
Design by different teams Use of agreed protocols and languages Standard, agent-specific design methodologies Open agent systems in specific domains (such
as in bioinformatics and e-commerce) More general scalability, arbitrary numbers
and diversity of agents in each such domain Bridging agents translating between domains
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Long Term 2009-
Design by diverse teams Truly-open and fully-scalable multi-
agent systems Across domains Agents capable of learning appropriate
communications protocols upon entry to a system
Protocols emerging and evolving through actual agent interactions.
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The Roadmap Timeline
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Technological Challenges
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Technological Challenges
Increase quality of agent systems to industrial standard
Provide effective agreed standards to allow open systems development
Provide infrastructure for open agent communities
Develop reasoning capabilities for agents in open environments
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Technological Challenges
Develop agent ability to adapt to changes in environment
Develop agent ability to understand user requirements
Ensure user confidence and trust in agents
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Industrial Strength Software Fundamental obstacle to take-up is lack
of mature software methodology• Coordination, interaction, organisation,
society - joint goals, plans, norms, protocols, etc
• Libraries of … agent and organisation models communication languages and patterns ontology patterns
CASE tools AUML is one example
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Industrial Strength Software
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Agreed Standards
FIPA and OMG• Agent platform architectures• Semantic communication and content
languages for messages and protocols
• Interoperability• Ontology modelling
Public libraries in other areas will be required
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Agreed Standards
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Semantic Infrastructure for Open Communities Need to understand relation of agents,
databases and information systems Real world implications of information
agents Benchmarks for performance Use new web standards for structural
and semantic description Services that make use of such semantic
representations
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Semantic Infrastructure for Open Communities Ontologies
• DAML+OIL• UML• OWL
Timely covergence of technologies Generic tool and service support Shared ontologies Semantic Web community exploring
many questions
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Semantic Infrastructure for Open Communities
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Reasoning in Open Environments Cannot handle issues inherent in
open multi-agent systems• Heterogeneity• Trust and accountability• Failure handling and recovery• Societal change
Domain-specific models of reasoning
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Reasoning in Open Environments Coalition formation Dynamic establishment of virtual
organisations Demanded by emerging
computational infrastructure such as• Grid• Web Services• eBusiness workflow systems
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Reasoning in Open Environments Negotiation and argumentation
• Some existing work but currently in infancy
Need to address• Rigorous testing in realistic environments• Overarching theory or methodology• Efficient argumentation engines• Techniques for user preference specification• Techniques for user creation and dissolution
of virtual organisations
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Reasoning in Open Environments
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Learning Technologies
Ability to understand user requirements• Integration of machine learning• XML profiles
Ability to adapt to changes in environment• Multi-agent learning is far behind single agent
learning• Personal information management raises
issues of privacy
Relationship to Semantic Web
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Learning Technologies
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Trust and Reputation
User confidence Trust of users in agents
• Issues of autonomy• Formal methods and verification
Trust of agents in agents• Norms• Reputation• Contracts
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Trust and Reputation
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Challenges for the Agent Community
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Community Organisation
Leverage underpinning work on similar problems in Computer Science: Object technology, software engineering, distributed systems
Link with related areas in Computer Science dealing with different problems: Artificial life, uncertainty in AI, mathematical modelling
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Community Organisation
Extend and deepen links with other disciplines: Economics, logic, philosophy, sociology, etc
Encourage industry take-up: Prototypes, early adopters, case-studies, best practice, early training
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Existing software technology Build bridges with distributed systems,
software engineering and object technology.
Develop agent tools and technologies on existing standards.
Engage in related (lower level) standardisation activities (UDDI, WSDL, WSFL, XLANG, OMG CORBA).
Clarify relationships between agent theories and abstract theories of distributed computation.
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Different problems from related areas Build bridges to artificial life,
robotics, Uncertainty in AI, logic programming and traditional mathematical modelling.
Develop agent-based systems using hybrid approaches.
Develop metrics to assess relative strengths and weakness of different approaches.
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Prior results from other disciplines Maintain and deepen links with
economics, game theory, logic, philosophy and biology.
Build new connections with sociology, anthropology, organisation design, political science, marketing theory and decision theory.
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Encourage agent deployment Build prototypes spanning organisational
boundaries (potentially conflicting). Encourage early adopters of agent
technology, especially ones with some risk.
Develop catalogue of early adopter case studies, both successful and unsuccessful.
Provide analyses of reasons for success and failure cases.
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Encourage agent deployment Identify best practice for agent
oriented development and deployment.
Support standardisation efforts. Support early industry training efforts. Provide migration paths to allow
smooth evolution of agent-based solutions, from today’s solutions,
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Application Opportunities
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Application Opportunities
Ambient Intelligence Bioinformatics and Computational
Biology Grid Computing Electronic Business Simulation Semantic Web
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Ambient Intelligence
Pillar of European Commission’s IST vision Also developed by Philips in long-term
vision Three parts
• Ubiquitous computing• Ubiquitous communication• Intelligent user interfaces
Thousands on mobile and embedded devices interacting to support user-centred goals and activity
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Ambient Intelligence
Suggests a component-oriented world populated by agents• Autonomy• Distribution• Adaptation• Responsiveness
Demands• Virtual organisations• Infrastructure• Scalability
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Bioinformatics
Information explosion in genomics and proteomics
Distributed resources include databases and analysis tools
Demands automated information gathering and inference tools
Open, dynamic and heterogeneous Examples: Geneweaver, myGrid
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Grid Computing
Support for large scale scientific endeavour
More general applications with large scale information handling, knowledge management, service provision
Suggests virtual organisations and agents
Future model for service-oriented environments
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Electronic Business
Agents currently used in first stage – merchant discovery and brokering
Next step is real trading – negotiating deals and making purchases
Potential impact on the supply chain Rise in agent-mediated auctions
expected• Agents recommend• But agents do not yet authorise agreements
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Electronic Business
Short term: travel agents, etc• TAC is a driver
Long term: full supply chain integration
At start of 2001, there were• 1000 public eMarkets• 30,000 private exchange
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Simulation
Education and training Scenario exploration Entertainment
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The Two Towers
Thousands of agents simulated using the MASSIVE system
Realistic behaviour for battle scenes
Initial versions included characters running away!
Previous use of computational characters did not use agent behaviour (eg Titanic).
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Current State
Pivotal role in contributing to broader visions of Ambient Intelligence, Grid Computing, Semantic Web, etc.
European strength is broad and deep Still requires integration, needs to avoid
fragmentation, needs effective coordination
Needs to support industry take-up and innovation
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For more information ...
Dr Michael Luck Department of Electronics and
Computer ScienceUniversity of SouthamptonSouthampton SO17 1BJUnited Kingdom
Feedback sought: please send feedback!
Roadmap: www.agentlink.org/roadmap
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The Book
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The CD
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The Agent Portalwww.agentlink.org