nuclear hardness(In telecommunication, the term nuclear hardness has the following meanings: An expression of the extent to which the performance of a system, facility, or device is expected to degrade in a given nuclear environment. The physical attributes of a system or electronic component that will allow survival in an environment that includes nuclear radiation and electromagnetic pulses (EMP). wiki Alexander Demidov)
thermal resistance(Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow. Thermal resistance is the reciprocal of thermal conductance. (Absolute) thermal resistance R in K/W is a property of a particular component. For example, a characteristic of a heat sink. Specific thermal resistance or specific thermal resistivity Rλ in (K·m)/W is a material constant. Thermal insulance has the units (m2K)/W in SI units or (ft2·°F·hr)/Btu in imperial units. It is the thermal resistance of unit area of a material. In terms of insulation, it is measured by the R-value. WK Alexander Demidov)
