An information-pattern-based approach to novelty detection

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An information-pattern-based approach to novelty
detection

• Presenter Lin, Shu-Han
• Authors Xiaoyan Li, W. Bruce Croft

Information Processing and Management (2008)
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Outline

• Motivation
• Objective
• Definition
• Observation
• Methodology
• Experiments
• Conclusion
• Personal Comments

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Motivation - specific topic

• It is very difficult for traditional word-based
  approaches to separate the two non-relevant
  sentences(34) from the two relevant
  sentences(12).
• The two non-relevant sentences are very likely to
  be indentified as novel because they contain many
  new words that do not appear in previous
  sentences.

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Motivation - general topic

• It is very difficult for traditional word-based
  approaches to separate the non-relevant
  sentence(2) from the relevant sentence(1).

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Objectives

• To attack above hard problem
• To provide a new and more explicit definition of
  novelty. Novelty is defined as new answers to the
  potential questions representing a user