USU Anchor Calibration Summary (v1.1)
Intensity weighting exponent p = 1.25
Scale factor k = 0.0003712922 (per weighted minute)

Implied USU values (renal colic anchored):
- Needle prick (blood draw): 0.000976254 USU
- Stubbed toe / paper cut: 0.009393325 USU
- Fingertip burn (2nd degree): 0.101405088 USU
- Renal colic (kidney-stone) episode (ref): 1.000000000 USU