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SEMWEB
2009
Springer
14 years 3 months ago
Conjunctive Query Answering in Distributed Ontology Systems for Ontologies with Large OWL ABoxes
We present a query processing procedure for conjunctive queries in distributed ontology systems where a large ontology is divided into ontology fragments that are later distributed...
Xueying Chen, Michel Dumontier
MDM
2007
Springer
147views Communications» more  MDM 2007»
14 years 3 months ago
Collaboratively Querying Sensor Networks through Handheld Devices
We envision that in some wireless sensor network applications, such as environmental monitoring, assisted living, and industrial control, handheld devices will be used from time t...
Tsz Wai Chiu, Qiong Luo
ADBIS
1998
Springer
100views Database» more  ADBIS 1998»
14 years 1 months ago
Multiple Range Query Optimization in Spatial Databases
In order to answer efficiently range queries in 2-d R-trees, first we sort queries by means of a space filling curve, then we group them together, and finally pass them for process...
Apostolos Papadopoulos, Yannis Manolopoulos
IPMI
2001
Springer
14 years 10 months ago
Spatio-temporal Covariance Model for Medical Images Sequences: Application to Functional MRI Data
Spatial and temporal correlations which affect the signal measured in functional MRI (fMRI) are usually not considered simultaneously (i.e., as non-independent random processes) in...
Frithjof Kruggel, Habib Benali, Mélanie P&e...
WWW
2009
ACM
14 years 10 months ago
Online expansion of rare queries for sponsored search
Sponsored search systems are tasked with matching queries to relevant advertisements. The current state-of-the-art matching algorithms expand the user's query using a variety...
Andrei Z. Broder, Peter Ciccolo, Evgeniy Gabrilovi...