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On 10/11/2014 09:44 PM, John Reiser wrote: >> bug velocity (increase in the bug number divided by the time >> interval) over time > That quotient is a scalar. Please use "bug rate" instead of "bug > velocity".Easy mnemonic: Velocity is a Vector, Speed is a Scalar. > "Velocity" has multiple syllables and multiple coordinates, "speed" > has one syllable and one coordinate. As a physicist, I see your point but I believe you are mistaken in principle. Velocity is indeed a vector quantity, but it is a vector in the parameter space you are considering. In our 3D world, velocity vector is a time derivative of the 3D displacement. In the bugzilla case, the system variable is scalar, so velocity is a scalar too. Normally, speed is the absolute value of velocity---one has to work hard at teasing it out of simple-to-get velocity; in this case they just are the same. 'bug velocity' just rolled off the tongue, simply because 'bug' is monosylabic and it somehow created a nice 'foot'. 'bug speed' sound awkward to me, although I kind-of like 'bug rate'. > [Irony: the original poster has an address @nist.gov (US National > Institute of Standards and Technology), where they should know and > appreciate the difference.] > > Please don't mix my work in it. I don't speak for them, and they don't for me, especially on Fedora issues. |
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