Information Integration, Search and Retrieval

Wednesday, April 21, 2010 - 9:56am


Wednesday, April 28, 2010
3:30 – 4:30
Computer Science Conference Room, Harold Frank Hall Rm. 1132

HOST: Ambuj Singh and Xifeng Yan

SPEAKER: Ullas Nambiar
IBM Research, India

Title: Information Integration, Search and Retrieval


The increasing availability of contextually related heterogeneous
information sources, both over the Web and also within an enterprise
Intranet, has lead to significant interest in query processing
frameworks that can integrate and extract information from such sources.
The fact that such sources are often autonomous and decentralized in
nature brings forth several challenges such as the need to operate with
very little information about the structure, scope, and contents of the
information sources and also the wide variation in the query modeling
capabilities of the users. To be
effective, the solution needs to be aware of, and be adaptive to the
characteristics of the sources (contextual correlation, data spread etc)
as well as the users’ inability to capture their informational need
using popular query formulation techniques.

In this talk, I will identify the challenges involved in building
information extraction solutions over sources of information exchange
that are emerging in the Web and the Enterprise. I will describe two
systems: 1) AIMQ: – System for supporting imprecise user queries over
structured data sources and 2) DynaCet: A domain independent dynamic
faceted search solution.

Note: IBM India Research Lab is hiring. Graduating students are welcome
to come by and hand over resumes to Ullas.


Dr. Ullas Nambiar is a researcher in the Information Management group at
IBM Research – India, Delhi where he has been involved in designing
novel systems for integrating and analyzing heterogeneous enterprise
data sources. He received a Ph.D in Computer Science from Arizona State
University in 2005 and a B.S in Computer Science from M.S.University,
Vadodara, India in 1997. He was a post-doctoral research scholar at UC
Davis and a software engineer at L&T Infotech, India.

He has worked primarily in data integration and search over distributed
sources and of-late has been investigating challenges in dealing with
massive data collections such as those available in the telecom
industry. He has published over 30 papers in leading DB and IR
conferences and journals, and served on several program committees. He
has also co-chaired several international workshops focusing on Web data
integration and analysis. More details at