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Dual Core 4, or DC4, is the newest polyphasic schedule in the Dual Core family of schedules. However, similar to Dual Core 3, it also has 2 core sleeps of one-cycle length each, with the addition of one nap. The total sleep is 4 hours and 20 minutes, which hovers around the very '''bare minimum amount''' for adaptability.
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{{TNT|DC4}}
[[File:Dual Core 4.png|center|thumb|Standard DC4]]
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'''DC4''', or '''Dual core 4''' is a proposed [[Dual core]] schedule, intended as a part of a possible [[gradual adaptation]] to [[Uberman]]. The configuration of the cores is the same as [[DC3]], but one more nap is added, and sleeps are placed equidistantly similar to Uberman. <ref name="dcpolynet" />
  
 
== Mechanism ==
 
== Mechanism ==
As a typical Dual Core schedule, DC4 inherits all the characteristics from Segmented sleep, with the repartitioning of SWS and REM into respective core sleeps. The last nap, being placed around 6 PM, is intended to provide more alertness. While looking very similar to DC3, the purpose of DC4 is to '''transition to Uberman sleep''', with 2 core sleeps to eventually be reduced to 2 20m naps. To prepare for the transition, all sleep blocks on DC4 look equidistant in scheduling to resemble the wake gap between each nap on Uberman, which is approximately ~3h40m to 4h.  
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{{further|Dual core#Mechanism}}
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As a Dual core schedule, DC4 shares most characteristics with other schedules in the family, especially [[DC3]]. As with DC3, the first core is expected to contain mostly SWS, whereas the second core is expected to contain a mixture of SWS, REM sleep, and light sleep. The first one to two naps are expected to be contain mainly REM sleep, thanks to its position in REM peak. Other naps is likely to contain more light sleep, as well as trace amounts of SWS.
  
Because of the 2 core sleeps, which facilitate ideally all SWS, the remaining naps provide REM sleep to keep a healthy balance of homeostatic pressure. The first nap is expected to be teemed with REM sleep, thanks to its position in REM peak. Other naps provide potentially less amount of REM sleep, as well as some NREM2.  
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The purpose of DC4 is to transition to [[Uberman]], with 2 core sleeps to eventually be reduced to naps via an intermediate adaptation to [[E5]]. To prepare for the transition, all the sleep blocks start at the same time as the target Uberman schedule, in an attempt to entrain the sleep pattern in advance.
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== Adaptation ==
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{{see|DC3#Adaptation}}
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Because DC4 is intended to be a transitional schedule to Uberman, it is not considered a long-term schedule. It is also not required to fully adapt to the schedule before transitioning to Uberman, as that would take a long time and not much more likely to be successful. The adaptation process is expected to be similar to that of DC3, or perhaps slightly easier due to the extra nap boosting alertness.
  
== Difficulty Scale ==
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== Difficulty==
Although DC4 even has more sleep than DC3, up to date '''no one has successfully adapted to DC4'''. Attempts are very rare. There used to be one attempt that almost resulted in a successful adaptation by the inventor of this schedule, but he had to quit due to the entanglement of some medicine use. It may even be more difficult than DC3, because of the extra nap that will stagnate sleep onset, and it will likely take longer for naps on this schedule to stick. The other sleep blocks closely resemble DC3, so this adaptation will be along the lines of E3/Bimaxion, if not more difficult to manage. SWS and REM wakes during the cores will be intensified during stage 3, and extensive alarm setup is required. The sharp repartitioning of sleep stages at first may induce SWS into the 2 afternoon naps, causing a lot of grogginess upon awakening.  
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{{see|DC3#Difficulty}}
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Although DC4 has more sleep than DC3, there has been no successful adaptations to the schedule. Attempts are very rare, as most Uberman attempts are started [[cold turkey]]. The inventor of this schedule almost successfully adapted, but had to quit due to unrelated medical issues. It may even be more difficult than DC3, as the extra nap is expected to make it more difficult to fall sleep.  
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As with DC3, intense SWS and REM sleep wakes during both cores and naps will be frequent during [[4-Stages Adaptation Model#Stage 3|stage 3]], and a comprehensive alarm setup is required.  
  
 
== Lifestyle Considerations ==
 
== Lifestyle Considerations ==
Because DC4 is intended to be a transitional schedule to Uberman, it is not considered a long-term schedule. The wake gap between each sleep is too small for most real-life activities, with the comprehensive forfeit of social life. While posing a Uberman-rhythm between each sleep and the total sleep appears to be sustainable for an extended period of time, the '''clumsiness in scheduling''' just adds to the burdens. DC4 is vastly inferior to DC3, and the transition to Uberman can take several months. So far, it remains a hypothetical polyphasic schedule that has not been far from being fully tested, and notably no one has adapted to Uberman from this schedule, either.  
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The wake gap between each sleep is too small for many activities, which makes the schedule difficult to sustain lifestyle-wise. The day gaps are similar to the gaps on Uberman, though the naps are expected to be more flexible after adaptation. Careful planning of daily activities like food and exercise will be required. The 3 naps placed in the day will also pose difficulties to those who not in full control of their own time.
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DC4 can be used to learn napping skills, being a much more sustainable form of [[Naptation]]. It is then advised to [[Recovery|recover]] afterwards, and start a polyphasic attempt without sleep debt. DC4 may also act as a fallback schedule if Uberman or [[E5]] fails, but no one has adapted to the schedule this way.
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== References ==
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{{reflist|refs=
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<ref name="dcpolynet">{{cite web |url=https://web.archive.org/web/20201125214728/https://www.polyphasic.net/schedules/dual-core/ |title=Dual Core Sleep Schedules |website=polyphasic.net |access-date=2020-11-24}}</ref>
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}}
  
With all the downsides, DC4's use is mostly to '''learn to nap''' with the high number of naps per day. It can be used as a less extreme form of Naptation thanks to 2 core sleeps. Sleepers can choose to start this schedule temporarily as a way to learn how to learn the short naps, recover on monophasic afterwards, and start a polyphasic attempt anew, including Uberman if desired. DC4 may also act as a fallback schedule if Uberman or E5 happens to fail, but no one has pulled this off so far. With everything being '''mostly hypothetical''', there is little to no use in attempting this schedule. DC3 would be the more preferable choice.
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[[Category:Schedules]]
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{{TNT|Polyphasic Sleep Schedules}}

Latest revision as of 14:27, 10 January 2021

DC4
Dual Core 4
chart link

Total sleep4 hours 20 minutes
Proposed byGeneralNguyen
DifficultyVery hard
Specification2 cores and 4 naps in an Uberman configuration.

DC4, or Dual core 4 is a proposed Dual core schedule, intended as a part of a possible gradual adaptation to Uberman. The configuration of the cores is the same as DC3, but one more nap is added, and sleeps are placed equidistantly similar to Uberman. [1]

Mechanism

As a Dual core schedule, DC4 shares most characteristics with other schedules in the family, especially DC3. As with DC3, the first core is expected to contain mostly SWS, whereas the second core is expected to contain a mixture of SWS, REM sleep, and light sleep. The first one to two naps are expected to be contain mainly REM sleep, thanks to its position in REM peak. Other naps is likely to contain more light sleep, as well as trace amounts of SWS.

The purpose of DC4 is to transition to Uberman, with 2 core sleeps to eventually be reduced to naps via an intermediate adaptation to E5. To prepare for the transition, all the sleep blocks start at the same time as the target Uberman schedule, in an attempt to entrain the sleep pattern in advance.

Adaptation

Because DC4 is intended to be a transitional schedule to Uberman, it is not considered a long-term schedule. It is also not required to fully adapt to the schedule before transitioning to Uberman, as that would take a long time and not much more likely to be successful. The adaptation process is expected to be similar to that of DC3, or perhaps slightly easier due to the extra nap boosting alertness.

Difficulty

Although DC4 has more sleep than DC3, there has been no successful adaptations to the schedule. Attempts are very rare, as most Uberman attempts are started cold turkey. The inventor of this schedule almost successfully adapted, but had to quit due to unrelated medical issues. It may even be more difficult than DC3, as the extra nap is expected to make it more difficult to fall sleep.

As with DC3, intense SWS and REM sleep wakes during both cores and naps will be frequent during stage 3, and a comprehensive alarm setup is required.

Lifestyle Considerations

The wake gap between each sleep is too small for many activities, which makes the schedule difficult to sustain lifestyle-wise. The day gaps are similar to the gaps on Uberman, though the naps are expected to be more flexible after adaptation. Careful planning of daily activities like food and exercise will be required. The 3 naps placed in the day will also pose difficulties to those who not in full control of their own time.

DC4 can be used to learn napping skills, being a much more sustainable form of Naptation. It is then advised to recover afterwards, and start a polyphasic attempt without sleep debt. DC4 may also act as a fallback schedule if Uberman or E5 fails, but no one has adapted to the schedule this way.

References

  1. "Dual Core Sleep Schedules". polyphasic.net. Retrieved 2020-11-24.