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== Mechanism ==
 
== Mechanism ==
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DC1's mechanisms largely carry on from the original Segmented sleep. Each core sleep is located around each respective sleep peak to further consolidate the overall sleep structure. The first core may remain around the same length or some slight reduction compared to the first core of Segmented sleep, to preserve the amount of SWS, while the second core is reduced in length so that REM can be alleviated in the nap. The nap also serves to bridge the long daytime wake gap which has increased because of the reduced total sleep from both cores combined. However, the nap on DC1 does not always guarantee a high percentage of REM sleep. For some attempters, it '''only contains NREM2''', or very small amount of REM, especially if the nap is placed somewhat late in the afternoon (after ~3 PM). Despite all that, the nap can sustain alertness for a long time until the first core (~7-8h) , because it is generally easier to stay awake in the day than during the night (~4-5h between 2 cores).
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DC1 is often compared to '''E2''', because both of them are the first schedules in their respective schedule series (Dual Core & Everyman). They have a similar amount of total sleep and the same number of sleep blocks (3) per day. The only difference is that E2's first nap is now a core in DC1, and that DC1's first core is recommended to start earlier than E2 core.
    
== Adaptation ==
 
== Adaptation ==
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