To understand the term, we must break it down. "Desimms" refers to the deconstruction or optimization of SIMMS protocols (Standardized Input Measurement and Modeling Systems). "Dose Free" indicates a state where the output result is entirely independent of the administered dose (e.g., radiation intensity, acoustic pressure, or thermal energy).
It is possible that "desimms" is a misspelling or a niche community term. You might want to check: desimms dose free