RESEARCH INTERESTS

• Data management and data mining
  
• Spatial network databases
• Clustering in information retrieval problems
• High performance database systems

• Member of the Database Research Group and Bioinformatics Research Group in Department of Computer Science and Engineering, Ohio State University (2009 - present).
• Member of Parallel and Distributed Computing Research Group and contributor in Information Retrieval Group in Department of Computer Engineering, Bilkent University (1999-2009).

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Journal Publications

• E. Demir, C. Aykanat, B. B. Cambazoglu. "A Link-Based Storage Scheme for Efficient Aggregate Query Processing On Clustered Road Networks"
  Information Systems 35(1): 75-93 , 2010. doi:10.1016/j.is.2009.03.005
   
• E. Demir, C. Aykanat, B. B. Cambazoglu "Clustering Spatial Networks for Aggregate Query Processing: A Hypergraph Approach"
  Information Systems 33(1): 1-17, 2008. [pdf] [link]

• I. S. Altingovde, E. Demir, F. Can, O. Ulusoy "Incremental cluster-based retrieval using compressed cluster-skipping inverted files"
  ACM Transactions on Information Systems. 26(3): 1-36, 2008. [pdf] [link]
   
• F. Can, I. S. Altingovde, E. Demir "Efficiency and effectiveness of query processing in cluster-based retrieval"
  Information Systems 29(8): 697-717, 2004. [more information]. [pdf ] [link]

Conference Publications

• I. S. Altingovde, E. Demir, F. Can, O. Ulusoy "Site-based dynamic pruning for query processing in search engines"
  Proc. of ACM SIGIR 2008: 861-862. [pdf] [link]
   
• E. Demir, E. Arkun "Constraint Based Update of Large Itemsets"
  Proc. of 16th International Symposium on Computer and Information Sciences (ISCIS XVI), Antalya, Turkey, Nov. 2001, 105-112. [pdf]

Thesis

• E. Demir "Storage and Access Schemes for Aggregate Query Processing on Road Networks"
  Ph.D. Thesis, Bilkent University, Ankara, Turkey, January 2009. [pdf]
   
• E. Demir "A Constraint-Based Incremental Approach for Update of Large Itemsets"
  M.S. Thesis, Bilkent University, Ankara, Turkey, August 2001. [pdf]

Reports

• E. Demir, C. Aykanat, B. B. Cambazoglu "A link-based storage scheme for efficient aggregate query processing on clustered road networks"
  Technical Report, Computer Engineering Department, Bilkent University, BU-CE-0707, November 2007. [pdf]

Manuscripts under review

• E.Demir, C. Aykanat. “Efficient Successor Retrieval Operations for Aggregate Query Processing on Clustered Road Networks”
  Information Sciences, under review, 2009.

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PROJECTS

Oku v4: A Tool for Visually Handicapped People  Sponsored by Microsoft Research Ltd. Duration: June, 2003 - June, 2004.

• Oku4All: A tool for visually handicapped people including web browser, email client, and rich-text editor.
• Okutman: Turkish Text-To-Speech Engine