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In the second part of the course , we will illuminate the different functional requirements of actual PEMFC components and present basic in-situ diagnostics ( Pt surface area , shorting , H2 crossover , electronic resistance , etc. ) . So in short , it is this convective overturning of the atmosphere - poorly represented in computer models of global warming - that primarily determines the temperature distribution of the surface and upper troposphere , not radiation balance . in M 87 is extremely short , shorter than detected at any other wavelength . Always consider electrical equipment energized unless positively proven otherwise : When working on electrical equipment , treat the equipment as live until it is tested , locked , tagged , shorted , and / or grounded , as appropriate . To make a very long story very short , I , the acrophobic novice hiker , almost bit off more than I could chew on the 20-mile one-day up-and-down traverse of the Presidential Range . Many readers of The Waste Land , particularly experienced ones , might prefer short , easily navigable footnotes so they can be reminded of only certain obscure facts without having to immerse themselves in a virtual world to get a tidbit or two of useful information . That , in short , it was Catholics who needed to be protected and not Protestants . But I do n't think that that argues for not shorting , I think that argues for being careful how you short .