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ESWS
2009
Springer
15 years 6 months ago
Ranking Approximate Answers to Semantic Web Queries
We consider the problem of a user querying semistructured data such as RDF without knowing its structure. In these circumstances, it is helpful if the querying system can perform a...
Carlos A. Hurtado, Alexandra Poulovassilis, Peter ...
EDBT
2010
ACM
202views Database» more  EDBT 2010»
15 years 6 months ago
Querying trajectories using flexible patterns
The wide adaptation of GPS and cellular technologies has created many applications that collect and maintain large repositories of data in the form of trajectories. Previous work ...
Marcos R. Vieira, Petko Bakalov, Vassilis J. Tsotr...
ICC
2007
IEEE
15 years 6 months ago
Speed Up Queries in Unstructured Peer-to-Peer Networks
—Unstructured peer-to-peer networks have gained a lot of popularity due to their resilience to network dynamics. The core operation in such networks is to efficiently locate res...
Zhan Zhang, Yong Tang, Shigang Chen
MMB
2004
Springer
149views Communications» more  MMB 2004»
15 years 5 months ago
Relating Query Popularity and File Replication in the Gnutella Peer-to-Peer Network
In this paper, we characterize the user behavior in a peer-to-peer (P2P) file sharing network. Our characterization is based on the results of an extensive passive measurement stu...
Alexander Klemm, Christoph Lindemann, Oliver P. Wa...
PODS
2010
ACM
213views Database» more  PODS 2010»
15 years 4 months ago
Expressive languages for path queries over graph-structured data
For many problems arising in the setting of graph querying (such as finding semantic associations in RDF graphs, exact and approximate pattern matching, sequence alignment, etc.)...
Pablo Barceló, Carlos A. Hurtado, Leonid Li...