TU Delft - Software Technology - Web Information Systems

Erwin Leonardi is a Postdoc Research Scientist in Web Information System group lead by Geert-Jan Houben at Delft University of Technology, Delft, the Netherlands. Prior to this position, he was a Research Fellow of Computation and Systems Biology in Singapore-MIT Alliance (SMA) working with Sourav Bhowmick at School of Computer Engineering, Nanyang Technological University, Singapore. He received his PhD degree in 2007 from Nanyang Technological University. Previously, he received his Bachelor of Science in Computing from Bina Nusantara University, Jakarta, Indonesia in 2001.

Research Interest

Projects

Research Activities

Publications

Conntact Information

Research Interests

• User Model Interoperability
• Adaptation and Personalization
• Semantic Web
• Adaptive Hypermedia
• XML and Web Data Management

Research Projects

• GRAPPLE
  Generic Responsive Adaptive Personalized Learning Environment (website )
• Da Vinci's Notebook
  Towards Consumable Complex-Structured Databases Prefetching-Driven Evaluation of Visual Graph Queries
• XCALIBUR
  XPath Processor on Commercial Relational Databases Having Tree-Unaware Kernel
• XANADUE
  XML Change Management in Relational Databases having Tree-Unaware Kernel

Reseach Activities

• Organizer:
  
  • LUPAS 2010 (in conjunction with ESWC 2010)
  • UDISW 2010 (in conjunction with IUI 2010)
    
• Program Committee Membership:
  
  • 2010: 3PGCIC-2010 ("Semantic and Web Services" Track), AINA 2010,
  • 2009: LMS-ALE Workshop (at EC-TEL 2009), FGABIS 2009,
  • 2008: ACM SAC 2008 - Special Track on Web Technologies
• Reviewer:
  
  • 2010: WWW Conference
  • 2009: IEEE Transaction on Learning Technologies, CoopIS, WISE, ICWE
    
  • 2005: DEXA, XSDM Workshop, SIGKDD Explorations v8.1 Special Issue on Real-World Data Mining Applications
    
  • 2004: APWeb
    
• Tutorial:
  
  • Managing Changes to XML Data: The State-of-the-Art.
    With Sourav Bhowmick and Sanjay Madria at the 9th International Conference on Web-Age Information Management (WAIM 2008), Zhangjiajie, China, July 2008.
    

Publications
( Conference paper; Journal paper; Workshop paper;  Book chapter)

1. Kees van der Sluijs, Geert-Jan Houben, Erwin Leonardi, Jan Hidders. Hera: Engineering Web Applications Using Semantic Web-Based Models. Book chapter: Semantic Web Information Management: A Model-Based Perspective, De Virgilio, Roberto; Giunchiglia, Fausto; Tanca, Letizia (Eds.), Chapter 19, 2010, Springer. [link]
   
2. Erwin Leonardi, Sourav S Bhowmick, Mizuho Iwaihara. Efficient Database-Driven Evaluation of Security Clearance for Federated Access Control of Dynamic XML Documents. In the Proceedings of 15thInternational Conference on Database Systems for Advanced Applications (DASFAA 2010). Springer Verlag, Tsukuba, Japan, April 2010. (Short paper)
   
3. Sourav S Bhowmick, Erwin Leonardi, Zhifeng Ng, Curtis Dyreson. Towards Non-Directional XPath Evaluation in a RDBMS. In the Proceedings of the 18th ACM International Conference on Information and Knowledge Management (ACM CIKM 2009). ACM Press, Hong Kong, China, November, 2009. (Short paper) [bibtex]
   
4. Fabian Abel, Dominikus Heckmann, Eelco Herder, Jan Hidders, Geert-Jan Houben, Daniel Krause, Erwin Leonardi, Kees van der Slujis. Mashing up user data in the Grapple User Modeling Framework. In the Proceedings of the 17th Workshop on Adaptivity and User Modeling in Interactive Systems (FGABIS08), Darmstadt, Germany, September, 2009.
   
5. Kees van der Sluijs, Jan Hidders, Erwin Leonardi, Geert-Jan Houben. GAL: A Generic Adaptation Language for Describing Adaptive Hypermedia. In the Proceedings of the International Workshop on Dynamic and Adaptive Hypertext: Generic Frameworks, Approaches and Techniques (DAH'09) in conjunction with the 20th ACM Conference on Hypertext and Hypermedia (Hypertext 2009), Springer Verlag, Torino, Italy, June-July, 2009.
   
6. Fabian Abel, Dominikus Heckmann, Eelco Herder, Jan Hidders, Geert-Jan Houben, Daniel Krause, Erwin Leonardi, Kees van der Sluijs. A Framework for Flexible User Profile Mashups. In the Proceedings of the International Workshop on Adaptation and Personalization for Web 2.0 (APWEB 2.0 2009) in conjunction with the International Conference on User Modeling, Adaptation, and Personalization (UMAP 2009), Springer Verlag, Trento, Italy, June, 2009.
   
7. Erwin Leonardi, Geert-Jan Houben, Kees van der Sluijs, Jan Hidders, Eelco Herder, Fabian Abel, Daniel Krause, Dominik Heckmann.   User Profile Elicitation and Conversion in a Mashup Environment. In the Proceedings of the International Workshop on Lightweight Integration on the Web (ComposableWeb'09) in conjunction with the 9th International Conference on Web Engineering (ICWE 2009), Springer Verlag, San Sebastian, Spain, June, 2009.
   
8. Matthias Niederhausen, Kees van der Sluijs, Jan Hidders, Erwin Leonardi, Geert-Jan Houben, Klaus Meißner.   Harnessing the Power of Semantics-based, Aspect-Oriented Adaptation for AMACONT. In the Proceedings of the 9th International Conference on Web Engineering (ICWE 2009), Springer Verlag, San Sebastian, Spain, June, 2009. [bibtex]
   
9. Zhou Yong, Sourav Bhowmick, Erwin Leonardi, Klarinda Widjanarko. XBLEND: Visual XML Query Formulation Meets Query Processing.  In the Proceedings of 25th IEEE International Conference on Data Engineering  (ICDE 2009). IEEE CS, Shanghai, China, March, 2009. (Demo paper)  [bibtex]
   
10. Erwin Leonardi, Tran T Hoai, Sourav S Bhowmick, Sanjay Madria. DTD-Diff: A Change Detection Algorithm for DTDs. In Data and Knowledge Engineering Journal (DKE), 61(2); pp. 384-402. Elsevier Science, 2007. [bibtex]
    
11. Sourav S Bhowmick, Erwin Leonardi, Hongmei Sun. Efficient Processing of High Selective XML Twig Patterns with Parent Child Edges in a Tree-Unaware RDBMS. In the Proceedings of the 16th ACM International Conference on Information and Knowledge Management (ACM CIKM 2007). ACM Press, Lisboa, Portugal, November, 2007. (Acceptance rate 17%) [bibtex]
12. Klarinda G. Widjanarko, Erwin Leonardi, Sourav S Bhowmick. Efficient Evaluation of Nearest Common Ancestor in XML Twig Queries Using Tree-Unaware RDBMS. In the Proceedings of the 18th International Conference on Database and Expert Systems Applications (DEXA 2007). Springer Verlag, Regensburg, Germany, September, 2007. (Acceptance rate 32%)  [bibtex]
    
13. Erwin Leonardi, Sourav S Bhowmick. XANADUE: A System for Detecting Changes to XML Data in Tree-Unaware Relational Databases. In the Proceedings of the ACM SIGMOD International Conference on Management of Data (ACM SIGMOD 2007). ACM, Beijing, China, June, 2007. (Demo paper)  [bibtex]
    
14. Boon-Siew Seah, Klarinda G. Widjanarko, Sourav S Bhowmick, Byron Choi, Erwin Leonardi. Efficient Support of Ordered XPath Processing in Tree-Unaware Commercial Relational Databases. In the Proceedings of the 12th International Conference on Database System for Advanced Applications (DASFAA 2007). Springer Verlag, Bangkok, Thailand, April, 2007. (Acceptance rate 18.7%)  [bibtex]
    
15. Erwin Leonardi, Sourav S Bhowmick. XANDY: A Scalable Change Detection Technique for Ordered XML Documents Using Relational Databases. In Data and Knowledge Engineering Journal (DKE), 59(2); pp. 476-502. Elsevier Science, 2006.  [bibtex]
    
16. Erwin Leonardi, Sourav S Bhowmick. OXONE: A Scalable Solution for Detecting Superior Quality Deltas on Ordered Large XML Documents. In the Proceedings of the 25th International Conference on Conceptual Modelling (ER 2006). Springer Verlag, Tuscon, USA, November, 2006. (Acceptance rate 23%)  [bibtex]
    
17. Erwin Leonardi, Tran T Hoai, Sourav S Bhowmick, Sanjay Madria. DTD-Diff: A Change Detection Algorithm for DTDs. In the Proceedings of the 11th International Conference on Database System for Advanced Applications (DASFAA 2006). Springer Verlag, Singapore, April, 2006. (Short Paper)  [bibtex]
    
18. Erwin Leonardi, Sourav S Bhowmick. Detecting Changes on Unordered XML Documents Using Relational Databases: A Schema-Conscious Approach. In the Proceedings of the 14th ACM International Conference on Information and Knowledge Management (ACM CIKM 2005). ACM Press, Bremen, Germany, October-November, 2005. (Acceptance rate 18%)   ACM CIKM 2005 Student Travel Award [bibtex]
    
19. Erwin Leonardi, Sri L. Budiman, Sourav S Bhowmick. Detecting Changes to Hybrid XML Documents Using Relational Databases. In the Proceedings of the 16th International Conference on Database and Expert Systems Applications (DEXA 2005). Springer Verlag, Copenhagen, Denmark, August, 2005. (Acceptance rate 23%) [bibtex]
    
20. Erwin Leonardi, Sourav S Bhowmick, Sanjay Madria. XANDY: Detecting Changes on Large Unordered XML Documents Using Relational Databases. In the Proceedings of the 10th International Conference on Database System for Advanced Applications (DASFAA 2005). Springer Verlag, Beijing, China, April, 2005. (Acceptance rate 22%) [bibtex]
    
21. Erwin Leonardi, Sourav S Bhowmick, T S Dharma, Sanjay Madria. Detecting Content Changes on Ordered XML Documents using Relational Databases. In the Proceedings of the 15th International Conference on Database and Expert Systems Applications (DEXA 2004). Springer Verlag, Zaragoza, Spain, September, 2004. (Acceptance rate 30%)  [bibtex]
22. Sourav S Bhowmick, Tay Khim Wee, Erwin Leonardi, Sanjay Madria. Storing DTD-conscious XML Data in XEDY. In the Proceedings of the 4th International Conference on Electronic Commerce and Web Technologies (EC-WEB 2003). Springer Verlag, Prague, Czech Republic, September, 2003. [bibtex]