Rescue-biased regenerative PLSS architecture study for delayed-ingress astronaut survival: closed-loop life support, isolated emergency O2 reserve, bounded oxygen regeneration, fault-tolerant power continuity, and validation-first systems engineering.

Engineering PoC for deep-space crew radiation protection: hydrogen-rich shielding, geometry-aware mass placement, and storm-shelter architecture for human spaceflight trade studies, habitat design review, and astronaut safety concept evaluation.