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{{Royalty}}
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{{Royalty}}{{infobox main|
{{Infobox main
 
 
| name = Circadian assistant
 
| name = Circadian assistant
| image = Health item bionic.png
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| image = Health item bionic.png|Circadian assistant
 
| type = Medical Items
 
| type = Medical Items
 
| type2 = Body Parts
 
| type2 = Body Parts
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| techHediffsTags = Advanced, ImplantEmpireCommon
 
| techHediffsTags = Advanced, ImplantEmpireCommon
 
}}
 
}}
The '''circadian assistant''' is an [[artificial body part]] that slows the rate at which pawns get [[Rest|tired]].
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The '''Circadian Assistant''' decreases the amount of sleep required by a pawn.
  
 
== Acquisition ==
 
== Acquisition ==
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== Summary ==
 
== Summary ==
An installed circadian assistant decreases [[Sleep Fall Rate]] by {{Good|-20%}}. This does ''not'' equal 20% less sleep. See [[#Sleep saved|Sleep Saved]] for the exact details. This modifier is applied ''before'' [[gene]]s and [[drug]]s, so in most situations it is equivalent to a simple {{Good|×80%}} factor.
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{{stub|section=1|reason=Order of operations with sleep [[gene]]s.}}
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An installed circadian assistant decreases [[Rest Fall Rate]] by {{Good|-20%}}. This does ''not'' equal 20% or 25% less sleep. See [[#Sleep saved|Sleep Saved]] for the exact details.
  
 
When a pawn with this implant is shocked with [[EMP]], they will receive [[brain shock]], knocking them unconscious temporarily.
 
When a pawn with this implant is shocked with [[EMP]], they will receive [[brain shock]], knocking them unconscious temporarily.
  
 
=== Installation ===
 
=== Installation ===
Installing the part requires {{Ticks|2500}} of work, 2x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 5.
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Installing the part requires {{ticks|2500}} of work, 2x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 5.
  
Removing the part requires {{Ticks|2500}} of work, 1x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 5.
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Removing the part requires {{ticks|2500}} of work, 1x medicine of [[Herbal medicine|herbal]] quality or better, and a [[Skills#Medical|Medical skill]] of 5.
  
If the operation fails, the part will be destroyed.
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If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.
  
== Analysis ==
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==Analysis==
The circadian assistant increases work hours without impacting Consciousness like the [[Circadian half-cycler|half-cycler]]. However, this implant is virtually always worse for productivity than either a [[bionic arm]] or [[bionic leg]], depending on the type of work the colonist focuses on. The brain shock makes using [[EMP]] against [[mech]]s more difficult, but gives a way to safely down the pawn in case of a [[mental break]] or [[prison break]].
 
  
With high quality [[bed]]s, and/or other positive modifiers to rest, consider setting a pawn's [[schedule]] entirely to Anything. A pawn with greatly enhanced sleep will go beyond a 24 hour sleep schedule, which means that pawns will spend less time moving to/from their bed. Remember that being in [[light|darkness]] will reduce work speed by a significant percentage, unless there is [[Ideoligion#Lighting|something]] [[Genes#Dark vision|mitigating]] [[light|this]].
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===Sleep saved===
 
 
=== Sleep saved ===
 
 
In essence, the circadian assistant only has an effect ''while the pawn is awake''. Therefore, '''actual sleep saving will always be lower''' than expected values.  
 
In essence, the circadian assistant only has an effect ''while the pawn is awake''. Therefore, '''actual sleep saving will always be lower''' than expected values.  
  
For example, a baseline pawn in a normal [[bed]] would spend 18.19 hours awake per 7.56 hours sleeping, to avoid being Drowsy. The assistant increases awake time to (18.19/0.8), or 22.74 hours awake, without impacting the sleep needed.
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For example, a baseline pawn in a normal [[bed]] would spend 18.19 hours awake per 7.56 hours sleeping. The assistant increases awake time to (18.19/0.8), or 22.74 hours awake, for the same sleep time.
  
* A baseline pawn in a normal bed spends (18.19 hr awake) / (7.56 + 18.19 hr total) = 70.6% of a day awake. Equal to 16.95 hr awake per 24 hour cycle, or 7.05 hours sleeping.
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Therefore:
* With the circadian assistant, this becomes (22.74 hr awake) / (7.56 + 22.74 hr total) = 75.04% of a day awake. Equal to 18.01 hr awake per 24 hour cycle, or 5.99 hours sleeping.
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*A baseline pawn spends (18.19 hr awake) / (7.56 + 18.19 hr total) = 70.6% of a day awake. Equal to 16.95 hr per 24 hour cycle.
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*With the circadian assistant, this becomes (22.74 hr awake) / (7.56 + 22.74 hr total) = 75.04% of a day awake. Equal to 18.01 hr per 24 hour cycle.
  
This means that, in a normal bed, the circadian assistant actually reduces sleep time by roughly {{---|15%}}, or about 1.06 hours per day, rather than the expected -20%.
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This means that the circadian assistant actually increases awake time by +4.44%, or about 1 hour per day, rather than the expected +20% or +25%. Increasing [[Rest Effectiveness]] or [[Rest Rate Multiplier]] will actually lower the amount of time savings of the circadian assistant.
  
Alternatively, you could say that the circadian assistant increases awake time by {{Good|x106.3%}}. Increasing [[Rest Effectiveness]] or [[Rest Rate Multiplier]] will actually lower the time savings of this implant. For example, a [[quick sleeper]] installing a circadian assistant would end up increasing awake time by {{Good|x104.5%}}, saving about 0.853 hours per 24-hour day compared to quick sleeper on its own.
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== Notes ==
 
 
=== Comparison to other bionics ===
 
With a rough baseline of actual sleep saved calculated above, it is possible to compare the ciradian assistant to other bionics.
 
 
 
[[Bionic arm]]s and [[bionic leg]]s increase [[Manipulation]] or [[Moving]] by +12.5%, per part, which increase work speed / travel speed by that amount. While "awake time" would increase both time working and travel time, the other parts are more specialized and thus are generally better at increasing a specific work's speed. In addition, both bionic arms and legs have ''some'' functional benefit in combat. Rest does ''not'' impact combat until 0% rest, where exhausted pawns will collapse on the ground.
 
  
If 2 bionic arms and/or 2 legs have already been installed, then the assistant offers a decent functional benefit. [[Bionic heart]]s offer {{Good|x105%}} Moving and an approximate 0.3 hour per day sleep reduction, so the circadian assistant would be better for work. However, it still confers an EMP weakness.
 
 
== Notes ==
 
 
Despite its description, it does nothing to mitigate toxic buildup.
 
Despite its description, it does nothing to mitigate toxic buildup.
  
{{Nav|body parts|wide}}
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{{nav|body parts|wide}}
 
[[Category:Medical Item]] [[Category:Body Part]] [[Category:Implant]]
 
[[Category:Medical Item]] [[Category:Body Part]] [[Category:Implant]]

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