Olga Vechtomova

Associate Professor
Associate Dean for Computing, Faculty of Engineering


Department of Management Sciences, Faculty of Engineering
cross-appointed in School of Computer Science
University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada, N2L 3G1
Email: ovechtom AT engmail.uwaterloo.ca
Phone: +1 519 888 4567 ext. 32675
Fax: +1 519 746 7252
Room: CPH 3631
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Research interests

My main research interests are in Information Retrieval systems and Natural Language Processing. I received PhD in 2001 from the Department of Information Science, City University, UK, under the supervision of Stephen Robertson and Susan Jones. My thesis "Approaches to using word collocation in information retrieval" explored query expansion with long-span collocates - words significantly co-occurring in the same topics with query terms. Below are some of my recent and current projects:

  • Entity retrieval and identification of semantic relations between entities in text. The goal of entity retrieval is to find a set of entities (referring to people, organizations, products, etc.) in response to a user's query. I am also working on methods to identify semantic classes of entities.

  • Targeted opinion retrieval. Finding opinions from large text collections (e.g., blogs) about an entity specified in the user's query.

  • Interactive and automatic query expansion. User interfaces for IR systems.

  • Extraction of Multi-Word Units (MWUs) from the corpus and their use in document retrieval.

  • Document ranking algorithms. Development of document ranking algorithms, which use information on the lexical cohesion between query terms and the topic structure of documents.

  • Query structure analysis. Analysis and processing of natural language queries representing complex information needs.

Research
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Last updated: 10 December, 2010