Current Research
My current work revolves around answering web queries using information from (semi) structured data sources. I am investigating methods and techniques to process information residing in hidden-web (partially) structured data stores and have data from such stores exposed as results in web search. In parallel, I am also investigating techniques that semantically analyze the queries as typed by the users. We then look into methods that exploit such semantics during evaluation / ranking of the queries. The ultimate goal is to produce more relevant web results and enhance the user experience with information not found on static text centric web pages.
This work is part of the Helix project that tries to extend and improve the search experience by combining structured and unstructured information using data management and web mining techniques.
Short bio
Currently, I work for Microsoft Research as a member of Search Labs, since July 2006. I have a Doctor of Philosophy (PhD) degree in Databases from the University of Michigan. My PhD advisor was Prof. H.V.Jagadish. My thesis work was on XML query processing and optimization -- it is included as a key part of the Timber project. I also hold a master’s degree in Computer Science from Northeastern University in Boston and did my undergrad in Computer Science at University of Macedonia in Thessaloniki, Greece. Besides my research work at the university, I gained some industrial experience working for 8 months in the Phoenix project with the Microsoft Research Database Group in 2001 and for 7 months in DB2 XML with the IBM Almaden Advanced Optimizations Group in 2005.
A few of my publications are listed below, also found on DBLP. Please email me for electronic copies. Thus far, I have received over 500 citations for the papers I have co-authored (source g-scholar).
- Stelios Paparizos, Alexandros Ntoulas, John Shafer, and Rakesh Agrawal, Answering web queries using structured data sources, in Proc. SIGMOD Conf., June 2009
- Yuqing Wu, Stelios Paparizos, and H. V. Jagadish, Querying XML in TIMBER, in IEEE Data Engineering Bulletin, vol. 31, no. 4, pp. 15-24, 2008
- Stelios Paparizos, Jignesh M. Patel, and H. V. Jagadish, SIGOPT: Using Schema to Optimize XML Query Processing, in Proc. ICDE Conf., September 2007
- Stelios Paparizos and H. V. Jagadish, The Importance of Algebra for XML Query Processing, in Lecture Notes in Computer Science, vol. 4254, pp. 126-135, 2006
- Stelios Paparizos and H. V. Jagadish, Pattern tree algebras: sets or sequences?, in Proc. VLDB Conf., August 2005
- Stelios Paparizos, Yuqing Wu, Laks V. S. Lakshmanan, and H. V. Jagadish, Tree Logical Classes for Efficient Evaluation of XQuery, in Proc. SIGMOD Conf., June 2004
- Zhimin Chen, H. V. Jagadish, Laks V. S. Lakshmanan, and Stelios Paparizos, From Tree Patterns to Generalized Tree Patterns: On Efficient Evaluation of XQuery, in Proc. VLDB Conf., September 2003
- Roger Barga, David Lomet, Stelios Paparizos, Haifeng Yu, and Sirish Chandrasekaran, Persistent Applications via Automatic Recovery, in IDEAS Conference, IEEE Computer Society, Hong Kong, July 2003
- Stelios Paparizos, Shurug Al-Khalifa, Adriane Chapman, H. V. Jagadish, Laks V. S. Lakshmanan, Andrew Nierman, Jignesh M. Patel, Divesh Srivastava, Nuwee Wiwatwattana, Yuqing Wu, and Cong Yu, Timber: A native system for quering XML, in Proc. SIGMOD Conf., June 2003
- Stelios Paparizos, Shurug Al-Khalifa, H. V. Jagadish, Andrew Nierman, and Yuqing Wu, A Physical Algebra for XML, 2002
- H. V. Jagadish, Shurug Al-Khalifa, Adriane Chapman, Laks V. S. Lakshmanan, Andrew Nierman, Stelios Paparizos, Jignesh M. Patel, Divesh Srivastava, Nuwee Wiwatwattana, Yuqing Wu, and Cong Yu, Timber: A Native XML Database, in VLDB Journal, vol. 11, no. 4, 2002
- Stelios Paparizos, Shurug Al-Khalifa, H. V. Jagadish, Laks V. S. Lakshmanan, Andrew Nierman, Divesh Srivastava, and Yuqing Wu, Grouping in XML, in Lecture Notes in Computer Science, vol. 2490, pp. 128-147, 2002
Contact Information:
Stelios Paparizos
Microsoft Research
1065 La Avenida
Mountain View, CA 94043, USA
+1-650-693-2022
E-Mail:
firstname.lastname@microsoft.com
Personal Website:
