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I’m a member of the Database Research Group . My supervisor is Ihab Ilyas. I’m currently involved in the RankDB and URank projects. I’m interested in relational database research in different areas including query processing and optimization, ranking and top-k retrieval. My current research is focused on processing and optimization of top-k queries in probabilistic databases. I’m also interested in other topics including information extraction, preferences management, and text mining.

is the first relational database system to study the integration of conventional ranking queries into uncertain and probabilistic databases. The URank project introduces new probabilistic formulations for ranking and ranking-aggregate queries. The formulations are based on marriage of traditional ranking semantics with possible worlds semantics. These formulations have triggered the design of novel techniques to support different probabilistic ranking queries, and leverage existing query processing and indexing capabilities in current RDBMSs to recognize and handle data uncertainty in score-based ranking.

     + URank Website
     + URank Overview Slides [ppt]
     + URank Publications

is a new mashup system building on concepts from rank-aware processing, probabilistic databases, and information extraction to enable ranked mashups of (unstructured) sources with uncertain ranking attributes. MashRank interleaves extraction with query processing by running information extraction programs against live Web sources, while asynchronously pushing extracted data into pipelined rank-aware relational query plans to limit extraction cost, and produce results in an early-out fashion.

     + Prototype Demo Videos

Configuring Web source

Building source wrapper

Joining Web sources

Rank join processing

• Ontario Graduate Scholarship (OGS), Ontario Government, 2009-2010
• Cheriton Excellence Scholarship, University of Waterloo, 2007-2009
• Graduate Merit Scholarship, University of Waterloo, 2006
• Entrance Scholarship, University of Waterloo, 2005
• B.S. distinction with degree of honor, Alexandria University, Egypt, 2000

• Winter 2005:  CS 448/648 - Introduction to Databases 
• Spring  2005:  CS 448/648 - Introduction to Databases 
• Fall 2005:   CS 448/648 - Introduction to Databases 
• Winter 2006:  CS 448/648 - Introduction to Databases 
• Spring 2006 CS125: Introduction to Programming Principles
• Fall 2007 CS348: Introduction to Database Management
• Winter 2009 CS348: Introduction to Database Management