Blog
News and technical articles.
Physiological intelligence, critical operations and what we are building at Dersalis.
Technical articles · October 29, 2026
Detecting fatigue without interrupting work: the role of parasympathetic activity
A model based on heart rate variability, validated over five industrial logistics shifts at Ocyan in Macaé, was right in 88% of its fatigue alerts without requiring any answer from the worker.
Technical articles · October 29, 2026
What workers say is not what the body shows: the bias of self-reported sleepiness in operations
Over three months on the ODN-1 drilling rig, 83% of self-assessments showed little or no sleepiness, yet 57% of attention tests showed low performance. What that gap teaches us about fatigue management.