> -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of John Woodgate > Sent: Wednesday, December 10, 2008 12:21 AM > To: [email protected] > Subject: Re: Cables On The Floor > > In message > <9d04b979323dcd428297dda95108893e0120c...@bb-corp-ex2.corp.cubic.cub>, > dated Tue, 9 Dec 2008, "Price, Edward" <[email protected]> writes: >
> >You would think that the odds of stepping on the cable would > be 285 to 1. > > You might, initially, but think about this. To make the math > easier, assume a square room and 289 footprints (17^2). So > there are 24 footprints along a diagonal. Lay a cable along > that diagonal, and all 24 footprints cover it, to a greater > or lesser extent. Then there are 23 new footprints along the > other diagonal, then 15 new ones along each side... So with 6 > cables we have 107 footprints on them, out of 289. > > Admittedly, this includes 'spherical cow' type > approximations, but it shows a trend. > -- > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK I'll defer to your logic, as I was sick the day they explained combinations and permutations to us. BTW, I'm almost afraid to ask, but what's a "spherical cow"? I think that might great to be able to authoritatively cite that in my next lab status report! Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 Military & Avionics EMC Is Our Specialty - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
