2635 search results - page 65 / 527 » Algorithms for the Database Layout Problem |
133
Voted
VLDB
2002
ACM
15 years 2 months ago
2002
ACM
Our experimental analysis of several popular XPath processors reveals a striking fact: Query evaluation in each of the systems requires time exponential in the size of queries in ...
110
Voted
SIGMOD
2004
ACM
16 years 2 months ago
2004
ACM
Trees and graphs are widely used to model biological databases. Providing efficient algorithms to support tree-based or graph-based querying is therefore an important issue. In th...
126
Voted
ADBIS
2009
Springer
15 years 9 months ago
2009
Springer
Abstract. We consider the problem of query containment for conjunctive queries with the safe negation property. Some necessary conditions for this problem are given. A part of the ...
129
Voted
MOBIHOC
2008
ACM
16 years 2 months ago
2008
ACM
Recent research shows that significant energy saving can be achieved in wireless sensor networks with a mobile base station that collects data from sensor nodes via short-range co...
111
Voted
MOBICOM
2009
ACM
15 years 9 months ago
2009
ACM
In November 2008, the FCC ruled that the digital TV whitespaces be used for unlicensed access. This is an exciting development because DTV whitespaces are in the low frequency ran...