What is a knowledge portal

1
What is a knowledge portal?
A website
A User Community
Knowledge Exchange
Knowledge Repository
2
Example Wikipedia, and other Wikis

• Technology Wiki for collaborative authoring of
  hyperlinked texts.
• Projects Wikipedia, MeatBallWiki, WikiNews,
  WikiTravel, Wiktionary, etc.
• Representation
• primary hyperlinked texts, like HTML
• conflict resolution discussion pages, revision
  history
• Size
• english 1 Mio. articles/ 1.2 Mio. reg. Users
• german 380.000 articles

3
Example OpenCPS, and other Question-Answering

• Technology formatted objects with optional
  atomic contributions
• Projects Problem-Solving, Question Answering,
  Forums, etc.
• Representation
• primary hyperlinked texts, like HTML
• conflict resolution discussion pages, revision
  history
• Size
• english 1 Mio. articles/ 1.2 Mio. reg. Users
• german 380.000 articles

4
Knowledge Sharing Dilemma(Presentation Roland
Müller/ Markus Schaal)
To share or not to share (Hoarding) - that is
the Question
5
Two-Player Knowledge Sharing
?
?

• Actionspace (A) per Player - share (s) or hoard
  (h)
• Reward per Player - reward A A ? O ?

6
Rewards for Player A (red)
A hoards, B shares (hs), hsgtss
A,B share (ss), ssgthh
Player B
reward
A,B hoard (hh)
A shares, B hoards (sh), shlthh
s
h
Player A
h
s
7
Rewards for Player A (red)
Player B
reward
s
h
Player A
h
s
8
Rewards for both Players
Global Optimum
Player B
reward
Equilibrum
s
h
Player A
h
s
9
Private vs. Public

• Private
• Excludes important experts
• Bounded number of users
• Protects private knowledge
• Explicit incentives
• Public
• All experts included
• Many users possible
• Public knowledge repository
• Needs time for critical mass

10
Portals

• Public Portals
• an encyclopedia, providing a coverage of
  universal knowledge of interest
• a dictionary, providing translations between
  languages or explanations of specific terms
• a transport information system, providing the
  best available route between two doors and
  starting at a specified time
• an event information system, providing trusted
  information about events
• a governance information system, providing
  decision support information concerning public
  decisions and people objections in a structured
  argumentation framework
• collaborative authoring of texts
• Private Portals are often mission-critical and
  secret
• Vision Inter-organizational sharing of
  non-mission critical knowledge.

11
A Success Modell

• What are the ingredients of a successful
  knowledge sharing community?
• What are the conditions of interorganizational
  knowledge sharing
• Is it feasible for a company to participate in a
  public knowledge portal
• How can public and private knowledge be combined

12
How does it work?

• Initial Knowledge Creation
• Private Paid Experts, Strong Incentives
• Public Altruistic Idiots ?
• Maintenance
• Public Depends on community size, if the value
  is high enough -gt self-running, otherwise -gt
  dying, Winner-Takes-All (Natural monopoly)
• Private Incentives

13
Trusted Events

• Is Analysis
• Event infos everywhere
• Some trusted sites and newsletters
• Generally not reliable, better call the organizer
• To Be Analysis
• Event Information provided by community
• Rating system for trusted event information
  sources
• Automatic federation of trusted sources
• Trusted Events as a universal public good

14
Value vs. Trust

• Event Information is rated after the event, not
  the event.
• Trust Values in 0,1 are computed for past AND
  FUTURE events.
• The anticipated trust value is shown to the user.
• The trust value can be interpreted as
• probability to take place in the expected manner
• fuzzy membership in Event takes place as
  expected
• NOTE The trust value is NOT the value of the
  event information.

15
Trusted Events a Senior Design Project

• 4 students, specializing in trust (1), general
  architecture (1), gui issues (1) and security
  (1), respectively.
• The rest of this session is organized as follows
• Presentation of the prototype and general
  architecture (NN)
• Presentation of the trust assissment and
  processing (NN)
• Presentation of GUI issues and their
  consideration during design and in the prototype
  (NN)
• Presentation of security issues and their
  consideration during design and in the prototype
  (NN)