8093 search results - page 1529 / 1619 » Design optimization |
239
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ICDT
2009
ACM
16 years 5 months ago
2009
ACM
We continue the study of approximating the number of distinct elements in a data stream of length n to within a (1? ) factor. It is known that if the stream may consist of arbitra...
148
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WWW
2008
ACM
16 years 5 months ago
2008
ACM
Because of the high volume and unpredictable arrival rate, stream processing systems may not always be able to keep up with the input data streams-- resulting in buffer overflow a...
161
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WWW
2008
ACM
16 years 5 months ago
2008
ACM
Efficiently querying RDF [1] data is being an important factor in applying Semantic Web technologies to real-world applications. In this context, many efforts have been made to st...
158
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WWW
2007
ACM
16 years 5 months ago
2007
ACM
Current web search engines focus on searching only the most recent snapshot of the web. In some cases, however, it would be desirable to search over collections that include many ...
143
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WWW
2007
ACM
16 years 5 months ago
2007
ACM
Several research efforts as well as deployments have chosen IEEE 802.11 as a low-cost, long-distance access technology to bridge the digital divide. In this paper, we consider the...