Document (#37695)

Author

Noy, N.F.

Title

Knowledge representation for intelligent information retrieval in experimental sciences

Imprint

Boston, MA : Northeastern University

Year

1997

Pages

V, 308 S

Abstract

More and more information is available on-line every day. The greater the amount of on-line information, the greater the demand for tools that process and disseminate this information. Processing electronic information in the form of text and answering users' queries about that information intelligently is one of the great challenges in natural language processing and information retrieval. The research presented in this talk is centered on the latter of these two tasks: intelligent information retrieval. In order for information to be retrieved, it first needs to be formalized in a database or knowledge base. The ontology for this formalization and assumptions it is based on are crucial to successful intelligent information retrieval. We have concentrated our effort on developing an ontology for representing knowledge in the domains of experimental sciences, molecular biology in particular. We show that existing ontological models cannot be readily applied to represent this domain adequately. For example, the fundamental notion of ontology design that every "real" object is defined as an instance of a category seems incompatible with the universe where objects can change their category as a result of experimental procedures. Another important problem is representing complex structures such as DNA, mixtures, populations of molecules, etc., that are very common in molecular biology. We present extensions that need to be made to an ontology to cover these issues: the representation of transformations that change the structure and/or category of their participants, and the component relations and spatial structures of complex objects. We demonstrate examples of how the proposed representations can be used to improve the quality and completeness of answers to user queries; discuss techniques for evaluating ontologies and show a prototype of an Information Retrieval System that we developed.

Content

Submitted in partial fulfillment of the requirements for the Degree of Doctor of Philosophy in Computer Science in the College of Computer Science at Northeastern University, Boston, MA. Vgl.: http://www.stanford.edu/~natalya/papers/Thesis.pdf.

Theme

Wissensrepräsentation

Field

Mikrobiologie
Molekularbiologie

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5. Herre, H.: General Formal Ontology (GFO) : a foundational ontology for conceptual modelling (2010) 0.19

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