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View all- Afrati FLekeas PLi C(2008)Adaptive-sampling algorithms for answering aggregation queries on Web sitesData & Knowledge Engineering10.1016/j.datak.2007.09.01464:2(462-490)Online publication date: 1-Feb-2008
Many Web sites publish their data in a hierarchical structure. For instance, Amazon.com organizes its pages on books as a hierarchy, in which each leaf node corresponds to a collection of pages of books in the same class (e.g., books on Data Mining). ...
Wireless sensor networks are often queried for aggregates such as predicate count, sum, and average. In untrusted environments, sensors may potentially be compromised. Existing approaches for securely answering aggregation queries in untrusted sensor ...
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