On 19 May 2006 09:40:30 -0700, "robert bristow-johnson"
<rbj@audioimagination.com> wrote:
>
>Rick Lyons wrote:
>>
>> (If there's a heaven, and if I'm there, I'm gonna
>> wait in line to ask God a few questions. Among
>> those questions will be: "What was the idea behind
>> having that tumor grow back? I mean, ... what was
>> the point of that?")
>
>that is, IMO, a healthier religious POV than the often quote "God's
>will is perfect and all things work toward the best end." my questions
>might be more about Darfur or whatever is the atrocity of the moment.
>(problem is, i might hear the same question returned to me!)
Darfur, ... humm, let's see. Isn't that the
place where the followers of the "Religion of Peace"
are torturing & killing anyone who doesn't strictly follow
the rules of the "Religion of Peace"? Oops, maybe
I shouldn't have said that because the news media wants
the identity of the murders to be kept secret.
>> (By the way, vanilla ice cream with dark chocolate
>> chips is *my* favorite. No Ben & Jerry's Ice Cream for
>> me. I wouldn't eat ice cream produced by those Hate-America
>> liberal knuckleheads if it were free.)
>
>being myself a Hate-America liberal knucklehead from Burlington
>Vermont, my only problem with Ben & Jerry's is the same as my problem
>with H=E4agen-Dazs. good, but way too expensive. when i buy ice cream,
>it's usually Breyers (even here in Vermont). when i make it, i make
>about 6 litres and it costs about $8 or $9 dollars. half-and-half is
>cheaper than cream but still is not real cheap and i need to buy two
>half gallons of it.
Six liters, wow! I'd like to try it.
Reply by John E. Hadstate●May 20, 20062006-05-20
"Rick Lyons" <R.Lyons@_BOGUS_ieee.org> wrote in message
news:446d9cc2.210349203@news.sf.sbcglobal.net...
>
> (If there's a heaven, and if I'm there, I'm gonna
> wait in line to ask God a few questions. Among
> those questions will be: "What was the idea behind
> having that tumor grow back? I mean, ... what was
> the point of that?")
>
Since I probably won't get the chance, I wonder if you'd ask
him about the guy that works in my building who has ALS and
has to wait in his wheelchair in the bathroom because some
brainless pink won't wee-wee with other men and has to yank
his wank in the stall for the seriously handicapped?
Reply by robert bristow-johnson●May 19, 20062006-05-19
Rick Lyons wrote:
>
> (If there's a heaven, and if I'm there, I'm gonna
> wait in line to ask God a few questions. Among
> those questions will be: "What was the idea behind
> having that tumor grow back? I mean, ... what was
> the point of that?")
that is, IMO, a healthier religious POV than the often quote "God's
will is perfect and all things work toward the best end." my questions
might be more about Darfur or whatever is the atrocity of the moment.
(problem is, i might hear the same question returned to me!)
> (By the way, vanilla ice cream with dark chocolate
> chips is *my* favorite. No Ben & Jerry's Ice Cream for
> me. I wouldn't eat ice cream produced by those Hate-America
> liberal knuckleheads if it were free.)
being myself a Hate-America liberal knucklehead from Burlington
Vermont, my only problem with Ben & Jerry's is the same as my problem
with H=E4agen-Dazs. good, but way too expensive. when i buy ice cream,
it's usually Breyers (even here in Vermont). when i make it, i make
about 6 litres and it costs about $8 or $9 dollars. half-and-half is
cheaper than cream but still is not real cheap and i need to buy two
half gallons of it.
r b-j
Reply by Rick Lyons●May 19, 20062006-05-19
On Fri, 19 May 2006 05:30:32 GMT, robert bristow-johnson
<rbj@audioimagination.com> wrote:
>in article 2LmdnXVYUPXadPXZnZ2dnUVZ_vmdnZ2d@rcn.net, Jerry Avins at
>jya@ieee.org wrote on 05/15/2006 16:49:
>
>> Rick Lyons wrote:
>...
>>>>> Actress Betty Davis said it many years ago,
>>>>> "Old age ain't for sissies."
>>>>> Good Hell, she was NOT jokin'.
>>>>
>>>> yeah. and i don't even know the half of it yet.
>>>
>>>
>>> Yep.
>>
>> Listen you young whippersnappers, I just signed up to get probed where
>> nobody ought to, I have a list of ailments too long to fit on the
>> medical forms, and the only thing that really bothers me is arthritis in
>> my right index finger. (I'm lefty.) Relax.
>
>i just saw this (we gotta title these things better), but i have to really
>make clear that i am not in ill health, not really. i still ride bike and
>climb mountains and stay up too late and ingest some things that are less
>than legal and might make my cardiologist less than happy with me (and won't
>unambiguously say in this wide open forum in our latest "big brother"
>society of Republican control). one substance that i ingest and is not
>illegal that might not make my cardiologist happy is ice cream (some of it
>homemade outa half-and-half). anyway, i'm not in deep shit or anything.
>it's just that i'm 50, come from a family with a genetic predisposition for
>heart disease (not at all uncommon), a couple of years ago headed off a
>coronary with a stent and statin drugs and a daily megadose of niacin. big
>friggin' hairy deal.
>
>so the fact is i don't even know the half of it yet and even though i like
>to complain about shit, i'm not fertilizer yet. maybe in 25 or 30 years
>i'll be.
>
>thanks, Jerry, for setting our perspectives straight.
>--
>r b-j rbj@audioimagination.com
>
Hi R B-J (& Jerry),
Yep, we have our aches and pains, but we shouldn't
complain too much. Whenever I feel like griping
about my health I have to remind myself that I've been
darned lucky compared to others. My ex-wife, for
example, developed a brain tumor in her early fifties.
Sheece!!! She had brain surgery. After that procedure
she had to learn to walk again. She has little sense
of balance now (ie., she can't ride a bicycle for
example) and she's deaf in one ear.
The crappy part of this story is that three years after
her surgery that f-----g (excuse my language)
tumor grew back!!!
(If there's a heaven, and if I'm there, I'm gonna
wait in line to ask God a few questions. Among
those questions will be: "What was the idea behind
having that tumor grow back? I mean, ... what was
the point of that?")
In any case, millions of people are a lot "worse off"
than us right now.
(By the way, vanilla ice cream with dark chocolate
chips is *my* favorite. No Ben & Jerry's Ice Cream for
me. I wouldn't eat ice cream produced by those Hate-America
liberal knuckleheads if it were free.)
See Ya',
[-Rick-]
Reply by Rune Allnor●May 19, 20062006-05-19
Rick Lyons wrote:
> Hi Guys,
>
> I have a (probably simple) question about
> "scaling" the coeffs of an IIR filter.
> I've been workin' on an simple 2nd-order
> biquad filter that takes the standard form:
>
> x --->(+)----->----------b0----->(+)---> y
> ^ | ^
> | [z^-1] |
> | | |
> (+)<---a1----+------b1---->(+)
> ^ | ^
> | [z^-1] |
> | | |
> +----a2-----+------b2------+
>
> (I stole this ASCII diagram from Jim Thomas.)
>
> Now, due to the values of the coefficients of the
> filter I'm working on, the filter's gain is huge!
> In the hundreds!
>
> Seeking to reduce the filter's gain I started
> to try to learn more about how to "scale" a
> biquad's coefficients to reduce its inherent gain
> without changing its freq response.
> (There's not much material on this "IIR scaling"
> topic in the DSP books on my bookshelf. Then,
> again, I don't have Al Clark's bookshelf.)
>
> Reviewing the exciting narrative on "IIR filter
> scaling" in Dale Grover's and John Deller' DSP
> book, I have arrived at the IIR filter shown as:
>
> x --->(+)--1/Gb-->------Gf*b0--->(+)---> y
> ^ | ^
> | [z^-1] |
> | | |
> (+)<--a1/Gb--+----Gf*b1--->(+)
> ^ | ^
> | [z^-1] |
> | | |
> +---a2/Gb---+----Gf*b2-----+
>
> That is, the original IIR filter's feedback coeffs
> are divided by a feedback gain factor "Gb",
> and feedforward coeffs are multiplied by a
> feedforward gain factor "Gf". The result of
> using these two Gb & Gf gain factors is a new biquad
> whose gain is the original biquad's gain multiplied
> by "Gb times Gf" (GbGf).
>
> So my MATLAB modeling is telling me that
> if I want to increase the original biquad's gain
> by 8, I can set Gb=4 & Gf=2. On the other hand,
> if I want to decrease the original biquad's gain
> by 0.25, I can set Gb=0.5 & Gf=0.5.
>
> So here are my questions that I hope you guys can
> help me answer: Is the above "scaled" block
> diagram correct? Is it really that simple to
> control the gain of a biquad IIR filter?
Yes, I think it is that simple. During my recent struggles
with IIRs, I learned that the analog LP prototype filter
was scaled just the way you suggest, in order to
obtain unit gain in the right spots. For the Butterworth
filter, one chooses scaling factors such that
|H(0)| == 1, implementing the scaling just as you
did above.
> The reason I ask those questions is because I've
> learned that when I think I see something "simple"
> in DSP I must remember what Gina Davis (Veronica)
> said in the movie The Fly. She said, "Be afraid.
> Be very afraid."
Good advice. Very good advice.
> I think of Gina's quote because too many times in
> the past when I thought I had a "simple" solution
> to a problem it turned out later that my "simple"
> solution spun around to bite me in the rear end!
Yep...
> OK guys, am I missing something important here
> in my simple IIR biquad scaling technique?
Nope. If you are, I'm doing the same mistakes as you...
> Thanks much for your advice,
> [-Rick-]
Rune
Reply by robert bristow-johnson●May 19, 20062006-05-19
in article 2LmdnXVYUPXadPXZnZ2dnUVZ_vmdnZ2d@rcn.net, Jerry Avins at
jya@ieee.org wrote on 05/15/2006 16:49:
> Rick Lyons wrote:
...
>>>> Actress Betty Davis said it many years ago,
>>>> "Old age ain't for sissies."
>>>> Good Hell, she was NOT jokin'.
>>>
>>> yeah. and i don't even know the half of it yet.
>>
>>
>> Yep.
>
> Listen you young whippersnappers, I just signed up to get probed where
> nobody ought to, I have a list of ailments too long to fit on the
> medical forms, and the only thing that really bothers me is arthritis in
> my right index finger. (I'm lefty.) Relax.
i just saw this (we gotta title these things better), but i have to really
make clear that i am not in ill health, not really. i still ride bike and
climb mountains and stay up too late and ingest some things that are less
than legal and might make my cardiologist less than happy with me (and won't
unambiguously say in this wide open forum in our latest "big brother"
society of Republican control). one substance that i ingest and is not
illegal that might not make my cardiologist happy is ice cream (some of it
homemade outa half-and-half). anyway, i'm not in deep shit or anything.
it's just that i'm 50, come from a family with a genetic predisposition for
heart disease (not at all uncommon), a couple of years ago headed off a
coronary with a stent and statin drugs and a daily megadose of niacin. big
friggin' hairy deal.
so the fact is i don't even know the half of it yet and even though i like
to complain about shit, i'm not fertilizer yet. maybe in 25 or 30 years
i'll be.
thanks, Jerry, for setting our perspectives straight.
--
r b-j rbj@audioimagination.com
"Imagination is more important than knowledge."
Reply by Jerry Avins●May 15, 20062006-05-15
Rick Lyons wrote:
> On 14 May 2006 18:51:14 -0700, "robert bristow-johnson"
> <rbj@audioimagination.com> wrote:
>
> Hi,
>
> (snipped)
>
>>>& I'm doomed forever to take
>>>four metformin tablets every stinkin' day.
>>
>>had to look that one up. is it in lieu of sticking yourself 4 times a
>>day?
>
>
> Yep, that is correct.
>
>
>>man, when you look up the price of these things, them druggie companies
>>do about as well as the oil companies. makes me mad as hell (and smug)
>>that they stole the election 5 1/2 years ago.
>
>
> Well, ... the "rat poison" that I take costs me
> $78/month. (I'm self-employed, so the only
> health insurance I can afford has NO prescription
> coverage.)
>
>
>>>Actress Betty Davis said it many years ago,
>>>"Old age ain't for sissies."
>>>Good Hell, she was NOT jokin'.
>>
>>yeah. and i don't even know the half of it yet.
>
>
> Yep.
Listen you young whippersnappers, I just signed up to get probed where
nobody ought to, I have a list of ailments too long to fit on the
medical forms, and the only thing that really bothers me is arthritis in
my right index finger. (I'm lefty.) Relax.
Part of why we have trouble competing in the international marketplace
is the medical coverage that employers pay for here but governments pay
for elsewhere. Some people are proud that we "have the finest medical
care in the world", but that isn't for everybody. A more telling
statistic is the *average* quality of medical care that US citizens get.
In that department, we're 29th on the list, right behind Costa Rica.
Jerry
--
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������
Reply by Rick Lyons●May 15, 20062006-05-15
On 14 May 2006 18:51:14 -0700, "robert bristow-johnson"
<rbj@audioimagination.com> wrote:
Hi,
(snipped)
>
>> & I'm doomed forever to take
>> four metformin tablets every stinkin' day.
>
>had to look that one up. is it in lieu of sticking yourself 4 times a
>day?
Yep, that is correct.
>man, when you look up the price of these things, them druggie companies
>do about as well as the oil companies. makes me mad as hell (and smug)
>that they stole the election 5 1/2 years ago.
Well, ... the "rat poison" that I take costs me
$78/month. (I'm self-employed, so the only
health insurance I can afford has NO prescription
coverage.)
>
>> Actress Betty Davis said it many years ago,
>> "Old age ain't for sissies."
>> Good Hell, she was NOT jokin'.
>
>yeah. and i don't even know the half of it yet.
Yep.
See Ya',
[-Rick-]
Reply by Jim Thomas●May 15, 20062006-05-15
Rick Lyons wrote:
> (I stole this ASCII diagram from Jim Thomas.)
>
Hi Rick,
Yer welcome. Had you not pointed it out, I would never have guessed
that it was my own work.
--
Jim Thomas Principal Applications Engineer Bittware, Inc
jthomas@bittware.com http://www.bittware.com (603) 226-0404 x536
Things could be a lot better around here, but worse is more likely - Calvin
Reply by robert bristow-johnson●May 15, 20062006-05-15
Rick Lyons wrote:
>
> Hi R B-J,
how're ya doin' sonny-boy. <cough, cough>
> But you've now
> made me realize that having Gb less than unity in
> your "R B-J's Figure 1" is gonna reduce the SNR of
> the input to my IIR filter whether I like it or not.
i did???
> Sheece... Thanks for pointing that out to me Robert.
...
>
> Some time ago I posted a wise-crack here on comp.dsp
> that, "IIR filters are for sissies."
i thought it was getting old is for sissies. or not getting old. now
you're really confusing me. i'm so confused. i think i'll take
another Mallox and sit back in the ol' rockin' chair.
> Thanks Robert, ... or as we're being forced to
> say in California, "Thanks Roberto."
naw, they ain't forcing you to say that in Cahlayforniah. the
Governator won't let them do that. you might have to speak
low-austrio-deutch and cecede the state from the Union (but not until
us Vermonters beat you to it) so that the Governator can run for
Presidenator and presidenates over the Richter 10.5 big one (they're
doing a made-for-TV movie on that) where the entire left coast falls
into the Pacific. meanwhile Vermont becomes the 11th Canadian
province. don't believe me? check out http://www.vermontcanada.org/
(looks like the al-Qaeda hackers got to it, check out waybackmachine:
http://web.archive.org/web/20050213101603/http://vermontcanada.org/ ).
slidin' head-first inta hell inna handbasket. and no SUV driving,
gas-suckin' chumps could see the wisdom in a 50 cent gas tax back in
the 90s when it was often below $1. now, despite the denials of global
warming by our beloved Decider-in-chief, it's pretty clear our kids
inherit a pile of shit to live on, thanks to our generation. there was
the "Greatest Generation" and then there was the consumptive
baby-boomers who rejected peace, love, and cannibis for such wonderful
Republican values like dump a huge national debt, trashed up planet,
and greatly limited fossil fuel resources onto our kids because we
wanted to live like pigs (and have them pay for it). "Gee, thanks, Mom
& Dad."
here i go again, Rick.
r b-j