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JACM
2010
120views more  JACM 2010»
12 years 11 months ago
The structure of inverses in schema mappings
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, Alan Nash
SIAMCOMP
2010
109views more  SIAMCOMP 2010»
12 years 11 months ago
Analysis of Delays Caused by Local Synchronization
Synchronization is often necessary in parallel computing, but it can create delays whenever the receiving processor is idle, waiting for the information to arrive. This is especia...
Julia Lipman, Quentin F. Stout
ICDT
2011
ACM
242views Database» more  ICDT 2011»
12 years 8 months ago
Knowledge compilation meets database theory: compiling queries to decision diagrams
The goal of Knowledge Compilation is to represent a Boolean expression in a format in which it can answer a range of online-queries in PTIME. The online-query of main interest to ...
Abhay Kumar Jha, Dan Suciu
STOC
2003
ACM
114views Algorithms» more  STOC 2003»
14 years 5 months ago
Testing subgraphs in directed graphs
Let H be a fixed directed graph on h vertices, let G be a directed graph on n vertices and suppose that at least n2 edges have to be deleted from it to make it H-free. We show tha...
Noga Alon, Asaf Shapira
EUROSYS
2008
ACM
14 years 1 months ago
Itrustpage: a user-assisted anti-phishing tool
Despite the many solutions proposed by industry and the research community to address phishing attacks, this problem continues to cause enormous damage. Because of our inability t...
Troy Ronda, Stefan Saroiu, Alec Wolman