Assertion: talc's use | /r/HasAspect | density variations
Facets:
Source sentences:
text: The use of liquids as calibration media has several advantages: (i) no air gaps and density variations, (ii) the ability to calibrate multiple sensors in a wide range of permittivity (from 2 to 35), and (iii) the possibility to separate sensor- and soil-specific effects (air or water gaps, metal electrode polarization, and dielectric dispersion at a specific frequency)