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SIGMOD
2002
ACM
181views Database» more  SIGMOD 2002»
16 years 4 months ago
Archiving scientific data
This report is part of the seminar Digital Information Curation held by Prof. Dr. Marc H. Scholl and Dr. Andr?e Seifert during the winter term 2005/06. Its intention is to summari...
Peter Buneman, Sanjeev Khanna, Keishi Tajima, Wang...
SIGMOD
2002
ACM
108views Database» more  SIGMOD 2002»
16 years 4 months ago
An adaptive peer-to-peer network for distributed caching of OLAP results
Peer-to-Peer (P2P) systems are becoming increasingly popular as they enable users to exchange digital information by participating in complex networks. Such systems are inexpensiv...
Panos Kalnis, Wee Siong Ng, Beng Chin Ooi, Dimitri...
PODS
2004
ACM
158views Database» more  PODS 2004»
16 years 4 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
PODS
2006
ACM
134views Database» more  PODS 2006»
16 years 4 months ago
Finding global icebergs over distributed data sets
Finding icebergs ? items whose frequency of occurrence is above a certain threshold ? is an important problem with a wide range of applications. Most of the existing work focuses ...
Qi Zhao, Mitsunori Ogihara, Haixun Wang, Jun Xu
PODS
2007
ACM
159views Database» more  PODS 2007»
16 years 4 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...