*sponsored by Deutsche Telekom AG
Intelligent Networks and Distributed Systems Management*
March, 24th 2003
Towards Trust-based Knowledge Management for Mobile CommunitiesStefan Schulz, Klaus Herrmann, Robert Kalcklösch, Thomas Schwotzer
AAAI Spring Symposium onAgent-mediated Knowledge Management
March 24-26, 2003, Stanford University
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Motivation and ObjectivesRecent works and current projects at iVS:> Non-functional aspects in middleware and distributed
applications> Assurance of Quality and Features for middleware components
> Middleware for intelligent, mobile, spontaneously networked systems> Mobile Multi-Agent Systems (AMETAS, MESHMdl)> Mobile shared knowledge exchange (Shark)
Goal for sharing knowledge with Shark:> Support mobile communities in knowledge management> Makes use of physical mobility of community members
Objectives for agent-based concept:> Overcome the restriction on physical mobility in Shark> Support valuation of knowledge> Integration of/to natural social behavior of individuals
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Part 2: Trust Network
Part 1: Agent-based Knowledge Network
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KnowledgeDissemination
KnowledgeReception
Natural Knowledge Management
Sports club
Company Municipal council
MaryPeter
Paul
Hans
Jean
Shareholder
Tennis
Jay Leno
XML
AMKM
Pets
Budget
HomePubOffice
Train
LoudnessDaytime
Notebook
Jacket
Emotion
Mobile
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Relevance and Strategy
KnowledgeDissemination
KnowledgeReception
Strategy
Relevance
Complexity Reduction
Representation
RoleTopic PartnerLocation
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KnowledgeDissemination
KnowledgeReception
Strategy
Relevance
Complexity Reduction
Representation
RoleTopic PartnerLocation
Roles
Role Employee PrivateTopic Product Offer Tennis Match
Relevance Business Interests Personal Interests
Strategy Business Policy Personal Policy
Acting on behalf of a network member
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KnowGents (Knowledge Agents)
Policy andInterest based
Knowledge Exchange
Policy andInterest based
Knowledge Exchange
Mobile Knowledge Exchange by Mobile Devices
Member Place
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Virtual Presence by Mobile Agents
Meet regularlyMeet regularly
DeleGents (Delegate Agents)
Build and Migrate DeleGent
Synchronize
Clone and/or Migrate
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Pattern of Encounter
Meet regularlyMeet regularly
Baseball
4711KM4242Canada3815
Tennis5371Jay Leno
5173AMKM4702
Social Networks are Small Worlds
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Summary: Agent-based Knowledge Network> KnowGents
> Reflect members of a social network> Provide interface to define Relevance and Strategy
for Contexts
> DeleGents> Virtual presence of network members> Reflect members acting on behalf of others
> Knowledge Network> By filtered agent communication> By strategic agent placement applying Pattern of
Encounter
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Marsh 1994
Basic Trust
Specific Trust
Contextual Trust
Trust: Valuation of relations between Members
Basic Trust > Initial Trust
Specific Trust > Trustability
Contextual Trust > Competence
Marsh 1994 > Knowledge
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Basic Trust > Initial Trust
Specific Trust > Trustability
Contextual Trust > Competence
Marsh 1994 > Knowledge
Level of Trust
Initial Trust I: c
Trustability T: f(member)
Competence C: f(member, topic)
-1 10
hostile friendlyneutral
Level of Trust: f(I,T,C)
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Adjusting Trust: based on Knowledge
Knowledge Transfer
Review
Direct Evaluation of transferred knowledge
Indirect Evaluation by knowledge review
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Adjusting Trust: based on Sharing Trust*
TrustManagement (Member ,
Topic T, Competenceexchanged)
(Member , Topic T, Competenceadjusted)
(Member , Topic T, Competencecurrent)
(Member , Topic “Trust”, Competencecurrent)
*simplified
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Summary: Trust Network
> Level of Trust> Valuation of social relations> Function on Initial Trust, Trustability, and
Competence
> Adjustment of Trust> Evaluation on transfer and by review> Exchange of trust
> Trust Network> Propagation of trust by exchange and DeleGents> Overall statistical trust
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Conclusions and OutlookConcept for trust-based mobile knowledge management support:> Judging sources and knowledge> Strategies for communication and virtual presence placement> Agents support propagation of trust
On-going and future aspects:> Investigation/Simulation: knowledge distribution in mobile
networks> Refinement/Adaptation of Level of Trust approach> Conflict resolution for strategies and judgement (e.g., for
hierarchies)
> “Fuzzy” Trust Management (e.g., Neural Networks, CBR, …)> (Integration of) Automated document decision> (Integration of) Automated context recognition
Thank You!
Stefan [email protected] Intelligent Networks and Distributed Systems ManagementBerlin University of Technologywww.ivs.tu-berlin.de
This presentation is © Copyright 2003 by iVS, TU-Berlin