There are multiple definitions:

1. reaction inhibiting substance(English)

2. right intercostal space(English)

   • LIS
   • Anatomy

3. radiologically isolated syndrome(English)

   • defined as incidentally identified white matter anomalies within the CNS that are suggestive of MS in healthy individuals who lack clinical symptomatology associated with CNS demyelination, after exclusion of other possible etiologies
   • CIS, MRI, MS, CNS
   • Brain (dys)function, Medical imaging
   • https://doi.org…000000000000102

4. Regensburg insomnia scale(English)

   • TQ
   • Sleep medicine, Scoring systems/scales, Auditory system
   • https://doi.org…155/2015/461090

5. reconfigurable intelligent surface(English)

   • a planar structure typically ranging in size from about 0.1 to 5 square meters, using advanced substances, called metamaterials, to reflect and refract electromagnetic waves
   • IoE, MIMO, SG
   • Magnetism, Communication, Signal analysis
   • https://doi.org…OC.2022.3196696
   • https://doi.org…OC.2021.3061778

6. required information size(English)

   • in meta-analyses is the number of participants or events necessary to reliably detect or reject a specific intervention effect. It prevents false-positive findings and type II errors by factoring in the anticipated intervention effect, control event rate, statistical errors (Alpha/Beta), and study heterogeneity
   • RCT, TSA
   • Statistics, Meta-analysis
   • https://doi.org…chf.2026.103172
   • https://doi.org…/1471-2288-9-86