A two process model of sleep regulation

What this work gives Aellic

The two-process model: sleep propensity is the interaction of homeostatic sleep pressure (Process S, rising exponentially during wake and falling exponentially during sleep) and a circadian rhythm (Process C). Its consequence for any sleep-debt feature: Process S SATURATES — sleep debt is not a bank account, it neither accumulates linearly forever nor is it repaid 1:1. The model supports only the qualitative shape (bounded, recency-weighted); every concrete window, decay or cap constant is construction, not literature.

Where this sits in the engine

4 declared sites: constants and thresholds in the code that point at this entry.

• Sleep Bedtime plan from wake time, sleep need and sleep debt 2 sites
• Sleep Sleep stages and bedtime 2 sites