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VLDB
2007
ACM
124views Database» more  VLDB 2007»
15 years 10 months ago
Ad-hoc Top-k Query Answering for Data Streams
A top-k query retrieves the k highest scoring tuples from a data set with respect to a scoring function defined on the attributes of a tuple. The efficient evaluation of top-k q...
Gautam Das, Dimitrios Gunopulos, Nick Koudas, Niko...
COCOON
2005
Springer
15 years 9 months ago
RIATA-HGT: A Fast and Accurate Heuristic for Reconstructing Horizontal Gene Transfer
Horizontal gene transfer (HGT) plays a major role in microbial genome diversification, and is claimed to be rampant among various groups of genes in bacteria. Further, HGT is a ma...
Luay Nakhleh, Derek A. Ruths, Li-San Wang
PODS
2010
ACM
181views Database» more  PODS 2010»
15 years 9 months ago
Schema design for XML repositories: complexity and tractability
Abiteboul et al. initiated the systematic study of distributed XML documents consisting of several logical parts, possibly located on different machines. The physical distributio...
Wim Martens, Matthias Niewerth, Thomas Schwentick
STOC
1994
ACM
128views Algorithms» more  STOC 1994»
15 years 8 months ago
Weakly learning DNF and characterizing statistical query learning using Fourier analysis
We present new results on the well-studied problem of learning DNF expressions. We prove that an algorithm due to Kushilevitz and Mansour [13] can be used to weakly learn DNF form...
Avrim Blum, Merrick L. Furst, Jeffrey C. Jackson, ...
DCOSS
2006
Springer
15 years 7 months ago
Approximation Algorithms for Power-Aware Scheduling of Wireless Sensor Networks with Rate and Duty-Cycle Constraints
We develop algorithms for finding the minimum energy transmission schedule for duty-cycle and rate constrained wireless sensor nodes transmitting over an interference channel. Sinc...
Rajgopal Kannan, Shuangqing Wei