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Conference thebay::joyoflex

Title:The Joy of Lex
Notice:A Notes File even your grammar could love
Moderator:THEBAY::SYSTEM
Created:Fri Feb 28 1986
Last Modified:Mon Jun 02 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1192
Total number of notes:42769

518.0. "Mill Specks Anyone?" by JACKAL::KEARNS (BRB&L RR Ferryboat Captain) Wed May 04 1988 21:34

    While doing a pc board check, a copy of a spec callled IEC 380 appendix
    B titled "Creepage Distance And Clearances In Secondary Circuits"
    was supplied as part of the design package. One of the notes in
    the spec stated; "For voltages exceeding 20,000 V (peak) further
    values may be obtained by numerical extrapolation or by graphical
    extrapolation on a straight line in a double logarithmic diagram".
    
    Now someone with a PHD in math probably knows what that is supposed
    to mean but to me it sounds loke Newspeak. Comments?
    
    ffk
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518.1No PhD needed, but clarity would be preferredMARKER::KALLISloose ships slip slips.Wed May 04 1988 23:5414
    This is one of those annoying cases where techspeak obfuscates intent.
    
    It's translation could be, "To determine approximate values [of
    whatever] when voltages [of whatever] exceed a peak value of 20,000
    Volts, [the values determined by whatever process has gone before]
    can be calculated through mathematical extrapolation.  These
    approximate values also can be indicated graphically using paper with 
    both the horizontal and vertical axes' values represented by
    logarithmic scales.  The graphical approximation will take the form
    of a straight line, which can be used for extrapolation."
    
    Admittedly, the original quote is shorter.  It's also foggier.
    
    Steve Kallis, Jr.
518.2everything you always wanted to know about ...ZFC::DERAMOI am, therefore I'll think.Thu May 05 1988 01:1710
     If two variables y and x are related by an equation of
     the form
                   c1 c2
                  x  y   = c3
     
     where c1, c2, and c3 are constants, then the graph of
     this relationship on "log-log" graph paper will be a
     straight line.  And vice versa.  [Void where prohibited.]
     
     Dan
518.3Newspeak vs. TechspeakGRNDAD::STONERoyThu May 05 1988 16:306
    Re: .0 JACKAL::KEARNS (ffk)
    
    The statements in the original note were written in perfectly
    acceptable engineering terms.  If ffk has difficulty with words like
    "extrapolate" and "double logarithmic diagram" he would best consult
    his supervisor or one of the trained engineers in his group.
518.4audience?VIA::RANDALLI feel a novel coming onThu May 05 1988 17:439
    If the quoted statement comes from a document aimed at hardware
    engineers, it's perfectly clear and acceptable.  I had no trouble
    understanding it (two years calculus, basic physics, an interest
    in electronics).
    
    However, if the document is aimed at a non-engineering audience
    (doubful if it's a spec), then it would be better rewritten.
    
    --bonnie
518.5Gee...DECSIM::HEILMANNow I try to be amused...Thu May 05 1988 19:402
    Gee, Mill Specks... are those small pieces of dirt found on windows
    in Maynard? :-)
518.6NahhPAMOLA::RECKARDJon Reckard, 381-0878, ZKO3-2/T63Thu May 05 1988 21:444
>    Gee, Mill Specks... are those small pieces of dirt found on windows
>    in Maynard? :-)

     No, they're John Stuart's bifocals.
518.7The Good Old DaysCOMICS::DEMORGANRichard De Morgan, UK CSC/CSMon May 09 1988 12:316
    Mill specks? When I worked in Maynard ('69 - 71) you could hardly
    see out of the windows. They were covered in cobwebs and were reputed
    to house unbelievably large spiders. Another problem in those days
    was the probability of a large dollop of lanolin (Maynard was formerly
    a wool mill) falling out of the ceiling and glueing all the papers
    on your desk together.
518.8good for crumpled disks, too, I betVIA::RANDALLI feel a novel coming onTue May 10 1988 23:374
    I know the lanolin must have been a nuisance, but nobody from the
    Mill ever had trouble with dried, wrinkled listings . . . 
    
    --bonnie
518.9If It Don't Itch, Don't ScratchDRUMS::FEHSKENSMon Jun 13 1988 23:1614
    re .4 - the only problem with rewriting it is that no matter how
    clearly you try to express the relationship, it won't help if the
    audience doesn't understand the concepts (interpolation, linearity,
    log graph paper, exponentials).  If you do understand the concepts,
    the language is perfectly clear.  If you have to have the concepts
    explained, a brief, straightforward statement turns into a rather
    lengthier lecture on mathematics.
    
    Given your qualification "(doubtful if it's a spec)", I suspect
    we agree.
    
    len.