On 4/15/12 11:28 PM, Eric Jacobsen wrote:> On Sun, 15 Apr 2012 23:25:37 -0400, Jerry Avins<jya@ieee.org> wrote: > >> On 4/15/2012 11:20 AM, Bret Cahill wrote: >> >> ... >> >>> Mathematicians, however, aren't satisfied with "well it woOOorks" >>> jerry rigs. >> >> I resent that. The word is "jury rig".who knows what this person meant? the word could be anything. now someone named Jury Avins is gonna resent it. there's always someone who'll resent some term. at the expense of offending threaded parts, i now say "we got screwed". when i was a kid, the word was "gypped" or even "jewed". i can't imagine anyone would take offense at that.>> ... >> >> Jerry > > Dangit. After the story about doing the field weld with an in-place > car battery and multiple pairs of sunglasses I was pretty certain it > was named after you. ;)plausible. but i never heard the story about arc-welding using a car battery. i'd like to hear that. i can only tell the story of a -35 F January day in Grand Forks North Dakota in the 70s (during a 2 week period that never got in the + territory) and (since lead-acid batteries do better if they get a little warmer than -35F) a method i used to use the batteries own stored energy to warm it up so this dumb car would start. i guess i just told it. -- r b-j rbj@audioimagination.com "Imagination is more important than knowledge."
A Few FFTs Short of MPC
Started by ●April 15, 2012
Reply by ●April 16, 20122012-04-16
Reply by ●April 16, 20122012-04-16
> > Mathematicians, however, aren't satisfied with "well it woOOorks" > > jerry rigs. > > I resent that. The word is "jury rig". > > � �... > > Jerryhttp://jerryrig.com/
Reply by ●April 16, 20122012-04-16
On Apr 16, 12:15�am, Bret Cahill <Bret_E_Cah...@yahoo.com> wrote:> > > Mathematicians, however, aren't satisfied with "well it woOOorks" > > > jerry rigs. > > > I resent that. The word is "jury rig". > > > � �... > > > Jerry > > http://jerryrig.com/:-)
Reply by ●April 16, 20122012-04-16
What has been and is being called "matched filtering" might better be called "a few steps short of complete match filtering" [which has the often desirable effect of _adding_ in some low pass filtering]. Noise is often at higher frequencies so no one is going to complain too much about this fortuitous get-more-by-doing-less situation. North didn't have time to be mathematically politically correct during a war, certainly not before machines costing less than a few days pay could calculate a dozen 1024 FFTs in seconds. Mathematicians, however, aren't satisfied with "well it woOOorks" jerry rigs. Since there isn't any major war going on recovering the original signal can now be considered, if only as a matter of form. This is easy to do in the frequency domain. Just take the square root of the product of signal X template. Excel makes this operation on complex numbers easy with IMSQRT. Now you can see the results of the frequency & phase angle matching without the seemingly inherent low pass filtering effects obscuring the match. Engineers like to get lucky with Fortuna but they also like dedicated operations. Do the _complete_ matched filter. After the original signal is recovered _then_ you add in whatever additional filtering you think is necessary. Even for signal detection recovering the original signal will often be a better route. What would be easier to detect? A triangle or a square wave? Bret Cahill "The mind invents things more easily than words. That's why so many bad terms come into existence." -- Tocqueville
Reply by ●April 16, 20122012-04-16
"Jerry Avins" <jya@ieee.org> wrote in message news:IiMir.1281$M37.859@newsfe01.iad...> On 4/15/2012 11:20 AM, Bret Cahill wrote: > > ... > >> Mathematicians, however, aren't satisfied with "well it woOOorks" >> jerry rigs. > > I resent that. The word is "jury rig". > > ... > > JerryAs a lurker trying to decide who is correct I see myself as a juror. I have not been rigged, it seems more like a jerry rig to me.
Reply by ●April 16, 20122012-04-16
"robert bristow-johnson" <rbj@audioimagination.com> wrote in message news:jmg56l$4gh$1@dont-email.me...> plausible. but i never heard the story about arc-welding using a car > battery. i'd like to hear that. >Simple enough if the parts to be welded are small. i can only tell the story of a -35 F January day in Grand Forks North> Dakota in the 70s (during a 2 week period that never got in the + > territory) and (since lead-acid batteries do better if they get a little > warmer than -35F) a method i used to use the batteries own stored energy > to warm it up so this dumb car would start. i guess i just told it. > > -- > > r b-j rbj@audioimagination.com > > "Imagination is more important than knowledge."Only for a moron without any knowledge, like the idiot Einstein that said it.
Reply by ●April 16, 20122012-04-16
On Apr 16, 5:08�am, "Androcles" <H...@Hgwrts.phscs.Apr.2012> wrote:> "Jerry Avins" <j...@ieee.org> wrote in message > > news:IiMir.1281$M37.859@newsfe01.iad... > > > On 4/15/2012 11:20 AM, Bret Cahill wrote: > > > � ... > > >> Mathematicians, however, aren't satisfied with "well it woOOorks" > >> jerry rigs. > > > I resent that. The word is "jury rig". > > > � ... > > > Jerry > > As a lurker trying to decide who is correct I see myself as > a juror. I have not been rigged, it seems more like a jerry > rig to me.http://en.wikipedia.org/wiki/Jury_rig
Reply by ●April 16, 20122012-04-16
Jerry Avins wrote:> On 4/15/2012 11:20 AM, Bret Cahill wrote: > > ... > >> Mathematicians, however, aren't satisfied with "well it >> woOOorks" >> jerry rigs. > > I resent that. The word is "jury rig". >Seems Jerry is synonym for Creative see http://www.google.com/search?q=%22jerry+rig%22+definition ;)
Reply by ●April 16, 20122012-04-16
> > "Imagination is more important than knowledge."> Only for a moron without any knowledge, like the idiot > Einstein that said it.Nietzsche clarifies: "Compared to a genius, that is, he who begets or gives birth, the scholar comes off a bit like an old maid. He's not conversant with the two most valuable functions of man."
Reply by ●April 16, 20122012-04-16
On 4/15/2012 8:25 PM, Jerry Avins wrote:> On 4/15/2012 11:20 AM, Bret Cahill wrote: > > ... > >> Mathematicians, however, aren't satisfied with "well it woOOorks" >> jerry rigs. > > I resent that. The word is "jury rig". > > ... > > JerryJerry, You are older than that! You reference the more recent usage. I'd never even heard "jury rig" in this context before. Not to be confused with "rigged jury". Fred
