Contents

• Acknowledgments
• List of Figures
• List of Tables
• Introduction
  • A glimpse of the future
  • Systems for filtering
    • Drawbacks of current filtering systems
    • Collaboration as a method for filtering
  • Systems for collaborative filtering
    • Where are we?
• Problem Statement
  • Desired system functionality
  • System constraints
  • Summary of the solution
    • Where are we?
• Issues in Design
  • Providing levels of accessibility
  • Controlling the costs of collaborative filtering
  • Respecting social conventions of the Usenet
  • Hooking in the collaborative filter
  • Behaviors of Net News Users
    • Obtaining data on user behavior
    • Trends in the data
      • Where are we?
• Design Architecture
  • Votes
    • Type of information exchanged by vote servers
  • Vote sources
    • Naming vote sources
  • Interface module
    • Specification of the Application Program Interface
  • Vote server
    • Accumulating votes into summaries
    • Interface module communication with vote server
    • How vote servers exchange information
  • Security and privacy of the system
  • Maintenance mechanisms
  • Comparison of system with design criteria
• Results and Conclusions
  • Implemented system
    • Time line for development
    • The news reader clients
    • Modifications to the xrn news reader
    • Modifying the nn news reader
  • Results
  • Conclusions
  • Future work
• Vote Server Communication Protocol
  • AVAIL - what groups have votes available
  • GROUP - fetch all votes for articles in group
  • VOTES - cast votes for articles
  • QUIT - break connection
• References
• About this document ...