melatonin

melafit: High-precision 24h melatonin profile analysis. Features bimodal skewed baseline cosine fitting (Van Someren & Nagtegaal, 2007) and a robust cost function (Gabel et al., 2017) for superior convergence, even with sparse data.

R package for estimating dim-light melatonin onset (DLMO) using the hockey-stick method

A windows app that makes the screen display only in red tones in order to lessen eye strain and the screen's impact on one's melatonin.

Sleep trackers tell you how you slept. SleepArchitect predicts it before you go to bed, by running Borbely's two-process model over today's caffeine, alcohol, workouts, light, and meal timing.

A simple calculator for melatonin dosing for children, based on the recent International Pediatric Sleep Association and American Academy of Neurology guidelines.

Open-source wearable circadian phototherapy gear for polar nights. Features an unnetworked microcontroller and an edge-lit brim diffuser directing a 5-stage variable-spectrum light sequence (460nm blue to 660nm red) down to lower retinal ipRGC receptors, providing distinct, non-continuous diurnal anchors using <2Wh daily.

Quick's (1974) photoreceptor pooling model — fitting melatonin suppression and PLR spectral sensitivities to multi-receptor models

Physiologically based pharmacokinetic-pharmacodynamic (PBPK/PD) model of oral melatonin with circadian oscillator coupling, virtual population simulation, and interactive Shiny app for personalized dosing.