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Figure 3 takes a closer look at the number of sessions observed where the node
is either on AC power the entire session, not on AC power the entire session, or
plugs in or unplugs during the session. There are nearly 3 times as many Windows XP network configuration sessions
where a node is on AC power versus not on AC power for the entire session. We
also note that further analysis indicated that for the sessions that exhibited a
state change, in about half of all cases over 80 percent of the session was spent
on AC power.
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