Sciweavers

BNCOD
2006
55views Database» more  BNCOD 2006»
14 years 28 days ago
On the Optimal Ordering of Maps, Selections, and Joins Under Factorization
We examine the problem of producing the optimal evaluation order for queries containing joins, selections, and maps. Specifically, we look at the case where common subexpressions i...
Thomas Neumann, Sven Helmer, Guido Moerkotte
BNCOD
2006
67views Database» more  BNCOD 2006»
14 years 28 days ago
Sources of Incompleteness in Grid Publishing
Alasdair J. G. Gray, Werner Nutt, M. Howard Willia...
BNCOD
2006
88views Database» more  BNCOD 2006»
14 years 28 days ago
The Lixto Project: Exploring New Frontiers of Web Data Extraction
The Lixto project is an ongoing research effort in the area of Web data extraction. Whereas the project originally started out with the idea to develop a logic-based extraction lan...
Julien Carme, Michal Ceresna, Oliver Frölich,...
BNCOD
2006
69views Database» more  BNCOD 2006»
14 years 28 days ago
Reducing Sub-transaction Aborts and Blocking Time Within Atomic Commit Protocols
Composed Web service transactions executed in distributed networks often require an atomic execution. Guaranteeing atomicity in mobile networks involves a lot more challenges than ...
Stefan Böttcher, Le Gruenwald, Sebastian Ober...
BNCOD
2006
125views Database» more  BNCOD 2006»
14 years 28 days ago
A New Trajectory Indexing Scheme for Moving Objects on Road Networks
In this paper, we propose an efficient signature-based indexing scheme for efficiently dealing with the trajectories of current moving objects on road networks. We show that our in...
Jae-Woo Chang, Jung-Ho Um, Wang-Chien Lee
BNCOD
2004
95views Database» more  BNCOD 2004»
14 years 28 days ago
XML Data Integration by Graph Restructuring
This technical report describes the XML data integration framework being built within the AutoMed heterogeneous data integration system. It presents a description of the overall f...
Lucas Zamboulis
BNCOD
2004
397views Database» more  BNCOD 2004»
14 years 28 days ago
DbSurfer: A Search and Navigation Tool for Relational Databases
Abstract. We present a new application for keyword search within relational databases, which uses a novel algorithm to solve the join discovery problem by finding Memex-like trails...
Richard Wheeldon, Mark Levene, Kevin Keenoy
BNCOD
2004
184views Database» more  BNCOD 2004»
14 years 28 days ago
Bulk Loading the M-Tree to Enhance Query Performance
The M-tree is a paged, dynamically balanced metric access method that responds gracefully to the insertion of new objects. Like many spatial access methods, the M-tree's perfo...
Alan P. Sexton, Richard Swinbank
BNCOD
2004
131views Database» more  BNCOD 2004»
14 years 28 days ago
Teaching SQL - Which Pedagogical Horse for This Course?
A student with a Computing Science degree is expected to have reached a reasonable level of expertise in SQL. SQL is a non-trivial skill to master and is taught with different degr...
Karen Renaud, Judy van Biljon
BNCOD
2004
65views Database» more  BNCOD 2004»
14 years 28 days ago
Reducing Damage Assessment Latency in Survivable Databases
Abstract. Traditional recovery mechanisms are not adequate in protecting databases from malicious attacks. A malicious transaction by virtue of writing on to the database can corru...
Indrakshi Ray, Ross M. McConnell, Monte Lunacek, V...