The presence of {HEAD ~ some gases} such as, for example, air or {TAIL ~ an inert gas}, or a vacuum, in the porous insulation material can reduce the overall dielectric constant of the insulation material, thereby effectively reducing the capacitance of the structure 
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The presence of { HEAD ~ some gases } such as , for example , air or { TAIL ~ an inert gas } , or a vacuum , in the porous insulation material can reduce the overall dielectric constant of the insulation material , thereby effectively reducing the capacitance of the structure
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH