A thermal heat shield is formed of a plurality of layers that are sandwiched together and which is adapted for a plurality of uses, including use on an automobile seat to shield a driver from heat generated behind the driver or beneath the automobile. A tuning body is provided adjacent to the HTS inductor and the HTS capacitor. 2 times the weight ratio of C4\u2212 molecules found in the oligomerization effluent stream, and a first hydrocarbon product stream, that comprises at least 1 wt % and no more than 30 wt % of C9 non-normal olefin; and splitting the first olefinic stream to produce the first olefinic recycle stream and a first purge stream. Hybrid maize seed, plant or plant part produced by crossing the variety PH18KN or a locus conversion of PH18KN with another maize variety.