Sciweavers

1064 search results - page 52 / 213
» The Case for Mobile OLAP
Sort
View
VLDB
1997
ACM
78views Database» more  VLDB 1997»
15 years 6 months ago
Recovering Information from Summary Data
Data is often stored in summarized form, as a histogram of aggregates (COUNTs, SUMs, or AVeraGes) over speci ed ranges. We study how to estimate the original detail data from the ...
Christos Faloutsos, H. V. Jagadish, Nikolaos Sidir...
136
Voted
ICDT
2012
ACM
235views Database» more  ICDT 2012»
13 years 4 months ago
Equivalence and minimization of conjunctive queries under combined semantics
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
Rada Chirkova
WDAG
2007
Springer
105views Algorithms» more  WDAG 2007»
15 years 8 months ago
Rendezvous of Mobile Agents in Unknown Graphs with Faulty Links
A group of identical mobile agents moving asynchronously among the nodes of an anonymous network have to gather together in a single node of the graph. This problem known as the (a...
Jérémie Chalopin, Shantanu Das, Nico...
FSTTCS
2009
Springer
15 years 8 months ago
Algorithms for Message Ferrying on Mobile ad hoc Networks
ABSTRACT. Message Ferrying is a mobility assisted technique for working around the disconnectedness and sparsity of Mobile ad hoc networks. One of the important questions which ari...
Mostafa H. Ammar, Deeparnab Chakrabarty, Atish Das...
CNSR
2008
IEEE
136views Communications» more  CNSR 2008»
15 years 8 months ago
Using QR-Updating with Reduced Complexity for Precise Localization in Mobile Sensor Networks
Localizing tiny sensor nodes in large wireless sensor networks is extremely complex, due to the node’s strict resource limitations regarding memory size, processor performance a...
Frank Reichenbach, Dominik Lieckfeldt, Dirk Timmer...