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VLDB
2005
ACM
110views Database» more  VLDB 2005»
15 years 11 months ago
U-DBMS: A Database System for Managing Constantly-Evolving Data
In many systems, sensors are used to acquire information from external environments such as temperature, pressure and locations. Due to continuous changes in these values, and lim...
Reynold Cheng, Sarvjeet Singh, Sunil Prabhakar
SEMWEB
2010
Springer
15 years 4 months ago
Using Reformulation Trees to Optimize Queries over Distributed Heterogeneous Sources
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...
Yingjie Li, Jeff Heflin
SIGMOD
2011
ACM
169views Database» more  SIGMOD 2011»
14 years 9 months ago
Leveraging query logs for schema mapping generation in U-MAP
In this paper, we introduce U-MAP, a new system for schema mapping generation. U-MAP builds upon and extends existing schema mapping techniques. However, it mitigates some key pro...
Hazem Elmeleegy, Ahmed K. Elmagarmid, Jaewoo Lee
CIDR
2003
134views Algorithms» more  CIDR 2003»
15 years 7 months ago
Approximate Range Selection Queries in Peer-to-Peer Systems
We present an architecture for a data sharing peer-to-peer system where the data is shared in the form of database relations. In general, peer-to-peer systems try to locate exactm...
Abhishek Gupta, Divyakant Agrawal, Amr El Abbadi
LREC
2010
210views Education» more  LREC 2010»
15 years 7 months ago
Evaluating Multilingual Question Answering Systems at CLEF
The paper offers an overview of the key issues raised during the seven years' activity of the Multilingual Question Answering Track at the Cross Language Evaluation Forum (CL...
Pamela Forner, Danilo Giampiccolo, Bernardo Magnin...