The Power of Firebird Events 2005
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ne of the difficulties of maintaining a large network of battery-powered, wire- less nodes is that failures are frequent. Sometimes these failures are fail-fast: for example, a node’s battery dies and it stops reporting readings. At other times, however, these failures are more insidious: a node’s readings slowly drift away from those of sensors around it, until they are mean- ingless or useless. Of course, there are times when such de-correlated readings actually represent an interesting, highly localized event (i.e., an outlier). In either case, however, the user will typically want to be informed...
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