Sciweavers

2701 search results - page 268 / 541
» Evaluation Issues
Sort
View
SDM
2008
SIAM
140views Data Mining» more  SDM 2008»
15 years 8 months ago
Creating a Cluster Hierarchy under Constraints of a Partially Known Hierarchy
Although clustering under constraints is a current research topic, a hierarchical setting, in which a hierarchy of clusters is the goal, is usually not considered. This paper trie...
Korinna Bade, Andreas Nürnberger
BNCOD
2006
55views Database» more  BNCOD 2006»
15 years 8 months 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
FORTE
2004
15 years 8 months ago
PEPA Nets in Practice: Modelling a Decentralised Peer-to-Peer Emergency Medical Application
Abstract. We apply the PEPA nets modelling language to modelling a peer-topeer medical informatics application, the FieldCare PDA-based medical records system developed by SINTEF T...
Stephen Gilmore, Valentin Haenel, Jane Hillston, L...
DMDW
2001
127views Management» more  DMDW 2001»
15 years 8 months ago
MAC: Conceptual data modeling for OLAP
In this paper we address the issue of conceptual modeling of data used in multidimensional analysis. We view the problem from the end-user point of view and we describe a set of r...
Aris Tsois, Nikos Karayannidis, Timos K. Sellis
RIAO
2000
15 years 8 months ago
Discovering and Comparing Topic Hierarchies
Hierarchies have been used for organization, summarization, and access to information, yet a lingering issue is how best to construct them. In this paper, our goal is to automatic...
Dawn Lawrie, W. Bruce Croft