Test post (ignore)

[Bill Bowden]

My news server is getting intermittent and only posts when it wants to. Just
wanted to see if it is working today.





--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

On Saturday, May 14, 2016 at 5:44:16 PM UTC-5, Jim Thompson wrote:

On Sat, 14 May 2016 15:41:14 -0700, "Bill Bowden"
bperryb@bowdenshobbycircuits.info> wrote:

My news server is getting intermittent and only posts when it wants to. Just
wanted to see if it is working today.



Sorry! Didn't see your post >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance

Yeah, nothing got through at all. Now let's talk politics.

 

[Jim Thompson]

On Sat, 14 May 2016 15:41:14 -0700, "Bill Bowden"
<bperryb@bowdenshobbycircuits.info> wrote:

My news server is getting intermittent and only posts when it wants to. Just
wanted to see if it is working today.

Sorry! Didn't see your post >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance

 

Hahaha.

Would trans outlets and plugs be a code violation?

 

It's a brilliant idea! It also solves the problem of women's restroom lines being long while men's restroom lines are short.

 

>"How about the bathroom issue?"

You mean the one that one of Billy Graham's kids said caused 911 ? Boy now that was smart, the issue just came up for real, but it made Saudi Arabians to hijack jets 15 years ago ? Back then people were still sucking up "Don't ask don't tell".

Far as I am concerned I don't care who anyone fucks, or even what. Go fuck goats for all I care. But these shits think that Gays in the military cause bad weather. Who the fuck raised these ninnies ?

They think there is a guy in the sky, an onmipotent being who can kill you with a thought, but in this case kills a bunch of people because of the actions of others. What, his aim is off ?

You already got targeted diseases, like Tay Sachs and sickle cell, and really, AIDS seems almost aimed at Gays. But some guys screw their olady in the ass, the Bible says nothing about that.

If I was god, I would get a lightning rifle with a scvope and just ZAP, ZAP, ZAP. Make a day out of it, get a list, check it twice and show people who has been naughty or nice.

But there is no buy in the sky and if there is I think he pretty much is taking a hands off policy. Or doesn't give a shit.

God didn't cause 911, the US meddling in the middle east at the behest of oil companies caused 911. God doesn't cause hurricanes, it is a certain combination of airflow in the atmosphere. Has that been influenced ? I would say that decades of underground nuclear testing has affected the weather. When you do that you turn the ground into a giant subwoofer. When you stir the water in a fish tank what happens ? It changes the stratification of temperature which in turn changes the patterns of flow.

What we really need on this planet is less people. Each person pollutes X amount at minimum. To heat your house, drive your car, all that. All requires burning something, and some people are stupid enough to claim this does not warn up the environment. But do you want to live like cavemen ? Give up your car, refrigerator, TV, and just go out hunting for meat because of course then there are no truck to bring it in and no grocery store to sell it and no credit card to buy it.

Nobody wants that, and in the US we like having a big yard we can have a party in with 100 people. We should stop all immigration right now, period. Especially now that nobody good wants to come here, all we are going to get are rapist refugees. Make them wear fucking chastity belts or something if you want to STEAL our tax dollars to support them.

Know what else ? They come here and can get more than us. Get put up in an apartment and get bus passes whereas my buddy who needs kidney dialysis doesn't have the gas money to get there. He is going to die and some motherfucker who hates this country will get it. I do not blame them for hating this country because they have seen American b0mbs kill their neighbors, friends and family members. But then why the fuck come here ?

Well some of them are sleepers. In a matter of a year or three they might try something, after the guard is down.

But to not allow them in, to do these rapes and bombings is somehow racist. I would make them eat a plate of bacon before letting them in.

And I a not saying we have the moral high ground here, but we gotta do what we gotta do. As long as the government antagonizes these people, we have to be on guard, and that means keeping them the fuck out of this country.

But they won't do that. They will let rapists and bombers in while trying to take your guns constantly so that you NEED the government to protect you. But they won't, they'll just write a bunch more laws that will be selectively enforced, mainly against White Men while letting others go free.

Little known is that the KKK was not founded to lynch Blacks. It was founded to lynch crooked judges. Of course things changed and they are a fucking joke now, but i the beginning things were different. But now, activist judges have bodyguards, and so do the politicians who need it the most.

The second amendment is quite clear on the fact that we have the right to guns to fight the government. Some say that is to shoot the politicians. I think it is more that we need to shoot their bodyguards and then lynch them.

With a short rope.

Anyone remember what that means ? A long rope with a gallows allows the body to fall thus breaking the neck and quickening death. More humane. With a short rope the executee hangs there and chokes to death. With a long rope, the broken neck will likely stop the heartbeat which means death in a couple minutes or less. Choking to death could take all day. Maybe someone would come along and "pull your leg", which is the origin of that saying.

We need some serious shit going on to straighten this country out, and I am not up to it. Too old, half blind, you want ME out there with a rifle ? I think not.

 

[Jim Thompson]

On Sat, 14 May 2016 20:24:28 -0700, "Bill Bowden"
<bperryb@bowdenshobbycircuits.info> wrote:

jurb6006@gmail.com> wrote in message
news:69913ed7-f29f-427b-98bc-46cf1250cfd1@googlegroups.com...
On Saturday, May 14, 2016 at 5:44:16 PM UTC-5, Jim Thompson wrote:
On Sat, 14 May 2016 15:41:14 -0700, "Bill Bowden"
bperryb@bowdenshobbycircuits.info> wrote:

My news server is getting intermittent and only posts when it wants to.
Just
wanted to see if it is working today.



Sorry! Didn't see your post >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance

Yeah, nothing got through at all. Now let's talk politics.


How about the bathroom issue? I think we should eliminate all the public
restrooms and install individual rest rooms like you have in your house. One
toilet, sink and mirror, That way there will be only one person in any one
room at a time and it doesn't matter what gender or identity you are.
Problem solved.

That is the obvious solution... thus won't be applied because Liberals
can't cope with the obvious.


...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Liberalism: Dictatorship By The People Who Think They Know Best

 

[Bill Bowden]

<jurb6006@gmail.com> wrote in message
news:69913ed7-f29f-427b-98bc-46cf1250cfd1@googlegroups.com...

On Saturday, May 14, 2016 at 5:44:16 PM UTC-5, Jim Thompson wrote:
On Sat, 14 May 2016 15:41:14 -0700, "Bill Bowden"
bperryb@bowdenshobbycircuits.info> wrote:

My news server is getting intermittent and only posts when it wants to.
Just
wanted to see if it is working today.



Sorry! Didn't see your post >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance

Yeah, nothing got through at all. Now let's talk politics.

How about the bathroom issue? I think we should eliminate all the public
restrooms and install individual rest rooms like you have in your house. One
toilet, sink and mirror, That way there will be only one person in any one
room at a time and it doesn't matter what gender or identity you are.
Problem solved.









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[Jim Thompson]

On Sat, 14 May 2016 21:55:37 -0700 (PDT), mrdarrett@gmail.com wrote:

>It's a brilliant idea! It also solves the problem of women's restroom lines being long while men's restroom lines are short.

I can recall an experiment in the '60's where there were female
urinals... lift skirt and straddle ;-)

Apparently it didn't go over well.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Liberalism: Dictatorship By The People Who Think They Know Best

 

"I can recall an experiment in the '60's where there were female
urinals... lift skirt and straddle ;-) "

I know Women who can piss standing up.

Actually it's not fair ! According to jokelore we traded multiple orgasms for that. Dammit. Not fair I tellya.

 

On Monday, May 16, 2016 at 1:10:00 PM UTC-7, Bill Bowden wrote:

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants to.
Just wanted to see if it is working today.



Another test for Monday May 16th.






--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

C is a passing grade, right?

Michael

 

[Bill Bowden]

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...

My news server is getting intermittent and only posts when it wants to.
Just wanted to see if it is working today.

Another test for Monday May 16th.






--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Adrian Caspersz]

On 16/05/16 21:09, Bill Bowden wrote:

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants to.
Just wanted to see if it is working today.



Another test for Monday May 16th.






--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

Hello from 2034!

I found this computer in a junk shop, and couldn't help replying. I've
got some spare credits for the ethernet time tunnel so hopefully this
message reply should be in your current time frame.

BTW your next weeks winning lottery numbers are 59 07

'
'
4-
'
t453
68b78b -`64384`

<message truncated, detected CRC Error>

--
Adrian C

 

On Wednesday, May 18, 2016 at 2:13:02 PM UTC-7, Bill Bowden wrote:

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nhd9ej$12ir$1@adenine.netfront.net...

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants to.
Just wanted to see if it is working today.



Another test for Monday May 16th.


It worked on Monday but not Tuesday. This the Wednesday test.


.



--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

Open-book, open-note test?

 

[Bill Bowden]

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nhd9ej$12ir$1@adenine.netfront.net...

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants to.
Just wanted to see if it is working today.



Another test for Monday May 16th.

It worked on Monday but not Tuesday. This the Wednesday test.


..



--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Bill Bowden]

<mrdarrett@gmail.com> wrote in message
news:8a087306-c93f-4c27-aa13-856b6cd0a7aa@googlegroups.com...

On Wednesday, May 18, 2016 at 2:13:02 PM UTC-7, Bill Bowden wrote:
"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nhd9ej$12ir$1@adenine.netfront.net...

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants
to.
Just wanted to see if it is working today.



Another test for Monday May 16th.


It worked on Monday but not Tuesday. This the Wednesday test.



Open-book, open-note test?

So, what is the bottom line about Fourier transforms? Is there some simple
example where knowing anything about it would be useful?






--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

"So, what is the bottom line about Fourier transforms? Is there some simple
example where knowing anything about it would be useful? "

Measuring frequency response of acoustic transducers without the need for an anechoic chamber. Time domain reflectometry. There are more but I don't remember them right now.

 

[Phil Hobbs]

On 05/18/2016 11:48 PM, Bill Bowden wrote:

mrdarrett@gmail.com> wrote in message
news:8a087306-c93f-4c27-aa13-856b6cd0a7aa@googlegroups.com...
On Wednesday, May 18, 2016 at 2:13:02 PM UTC-7, Bill Bowden wrote:
"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nhd9ej$12ir$1@adenine.netfront.net...

"Bill Bowden" <bperryb@bowdenshobbycircuits.info> wrote in message
news:nh89ic$28k2$1@adenine.netfront.net...
My news server is getting intermittent and only posts when it wants
to.
Just wanted to see if it is working today.



Another test for Monday May 16th.


It worked on Monday but not Tuesday. This the Wednesday test.



Open-book, open-note test?

So, what is the bottom line about Fourier transforms? Is there some simple
example where knowing anything about it would be useful?

The frequency response of an audio amp.

A diffraction grating.

Frequency-compensating a feedback loop.

Calculating an antenna pattern.

Anything where you care about both frequency and time domain behaviour.

Fourier transforms are the most useful sort of math in my work, both
electronic and optical--being able to do it (approximately) in my head
helps a lot. If you have undergraduate math, you might get a copy of
Bracewell's "The Fourier Transform and its Applications". The second
edition is cheap on abebooks.com--about $20 or so.

I took the class from Bracewell himself 30 years ago, and the book is
great for building intuition.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

 

[Bill Bowden]

"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message
news:573DCF94.8080505@electrooptical.net...

On 05/18/2016 11:48 PM, Bill Bowden wrote:
So, what is the bottom line about Fourier transforms? Is there some
simple
example where knowing anything about it would be useful?

The frequency response of an audio amp.

A diffraction grating.

Frequency-compensating a feedback loop.

Calculating an antenna pattern.

Anything where you care about both frequency and time domain behaviour.

Fourier transforms are the most useful sort of math in my work, both
electronic and optical--being able to do it (approximately) in my head
helps a lot. If you have undergraduate math, you might get a copy of
Bracewell's "The Fourier Transform and its Applications". The second
edition is cheap on abebooks.com--about $20 or so.

I took the class from Bracewell himself 30 years ago, and the book is
great for building intuition.

Cheers

Phil Hobbs

Well, I looked around Google and didn't find much I could understand. I did
see something about spectrum analyzers that display the harmonic content of
complex waveforms. I hear a triangle waveform consists of all the odd
harmonics added up in some proportions. So, it is possible to use fourier
transforms to work out the third harmonic content of a triangle waveform?
That might be something I could understand.








--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Phil Hobbs]

On 05/19/2016 11:31 PM, Bill Bowden wrote:

"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message
news:573DCF94.8080505@electrooptical.net...
On 05/18/2016 11:48 PM, Bill Bowden wrote:
So, what is the bottom line about Fourier transforms? Is there some
simple
example where knowing anything about it would be useful?

The frequency response of an audio amp.

A diffraction grating.

Frequency-compensating a feedback loop.

Calculating an antenna pattern.

Anything where you care about both frequency and time domain behaviour.

Fourier transforms are the most useful sort of math in my work, both
electronic and optical--being able to do it (approximately) in my head
helps a lot. If you have undergraduate math, you might get a copy of
Bracewell's "The Fourier Transform and its Applications". The second
edition is cheap on abebooks.com--about $20 or so.

I took the class from Bracewell himself 30 years ago, and the book is
great for building intuition.

Cheers

Phil Hobbs

Well, I looked around Google and didn't find much I could understand. I did
see something about spectrum analyzers that display the harmonic content of
complex waveforms. I hear a triangle waveform consists of all the odd
harmonics added up in some proportions. So, it is possible to use fourier
transforms to work out the third harmonic content of a triangle waveform?
That might be something I could understand.

Sure, that's a fairly elementary application, but pretty useful in
estimating spectra. The basic mathematical technology that Fourier
transform theory is based on is _orthogonality_.

Orthogonal functions are a generalization of ordinary vectors. The idea
is that a function is like a vector with an infinite number of
dimensions (one for each point on the X axis, for instance). You take
the dot product (or inner product) of two vectors A and B by forming the
sum

A dot B = sum (i=1 to N) A_i * B_i

which in the function case becomes

A dot B = integral (x0 to x1) A(x) * B(x) dx (*)

for some suitably chosen end points (which may be at +-infinity)

In analysis, two functions are said to be _orthogonal_ when
A dot B = 0, just like vectors again.

The seriously nonobvious fact is that there's also an analogy to the
vector space idea of a complete basis set, meaning that you can make up
any vector or any function using a weighted sum of the basis vectors.

In 3-space, for instance, a vector

[x, y, z] = x*[1 0 0] + y*[0 1 0] + z*[0 0 1].

If you choose the basis set to be ortho_normal_ (i.e. the vectors are
mutually orthogonal and 1 unit long), as we just did, you can decompose
a given vector by taking its dot product with each of the basis vectors
in turn:

x = [x y z]^T dot [1 0 0] et cetera.

As in this simple case, there are orthonormal basis vectors for the
space of functions of one variable, which in the unweighted case (see
below) are sines and cosines. If we take the interval to be [0, 1], and
specialize to the case where the end points are at zero, the basis
functions are

phi_N(x) = sqrt(2) sin(2N pi x), n = 1, 2, ....

You can verify that these are orthonormal by writing the dot products:

phi_N(x) dot phi_N(x) = 2 integral(0 to 1) sin**2(2N pi x) dx

which is 1.0 as expected, and

phi_N(x) dot phi_M(x) = 2 integral(0 to 1) sin(2N pi x) sin(2M pi x) dx

which is zero because its integrand is

sin(2N pi x) sin(2M pi x) = cos(2(M-N) pi x) - cos(2(M+N) pi x).

If M!= N, there's no DC term, and we're integrating over a whole number
of periods, so the AC terms integrate to zero. (The case of M = -N
doesn't come up because the index is always positive.)

Thus the cool and useful fact: you can find the Fourier decomposition of
a periodic function by multiplying it by each of the sine basis
functions and integrating over the period.

Thus if we consider g(t) to be a unit-amplitude square wave of period 1,
it has a Fourier decomposition

g(t) = sum (N=1 to infinity) G_N * sqrt(2)* sin(2N pi t)

where G_N is

G_N = integral (0 to 1) g(t) * sqrt(2) sin(2N pi t) dt.

Since a square wave is +1 for the first half cycle and -1 for the second
half, this is

G_N = sqrt(2) * [ integral (0 to 0.5) (sin 2N pi t) dt
- integral (0.5 to 1 (sin 2N pi t) dt]

which is

G_N = -1/(N pi) (sqrt(2)/2) [ (cos[N pi) - cos(0))
- (cos(2N pi) - cos(N pi)]

Now cos(2N pi) = cos(0) = 1, so taking out a factor of -2 from the
square brackets,

G_N = 1/(N pi) sqrt(2) [ 1 - cos(N pi)].

The term in square brackets is 2 for odd N and 0 for even N. Thus the
Fourier expansion of a unit-amplitude square wave is

g(t) = sum 4/(pi N) sin(2N pi t) , N = 1, 3, 5, ....


The Fourier transform is a further generalization of these ideas to let
the limits of integration go to +- infinity. In that case, the
coefficients G_N are no longer discrete, but form a continuum, i.e. a
function of the frequency f.

There are a lot of interesting consequences to this, for instance the
sampling theorem and FFTs. There are also some mathematical subtleties
having to do with convergence of the series, but that's the gist.
(Obviously making functions with step discontinuities out of smooth
functions is going to take a lot of terms, and interesting things happen
when you take partial sums of the series.)

You asked about a triangle wave, which is just a little bit more
difficult, but you can easily derive it by integrating term by term (a
triangle wave is the integral of a square wave). You do have to do a
little bit of fancy footwork, because doing the integration shifts the
wave by a quarter cycle, thereby turning all the sines into cosines, but
the coefficients are correct when you plug them into the sine expansion
above.

If you could follow the above OK, you know enough math to read Bracewell.

(*) In general there's a weighting function w(x) multiplied in as well,
but Fourier corresponds to the case w(x)==1, so I've left it out. If
you change variables, you have to change the weight function. For
instance, Chebyshev polynomials are just sines and cosines with a change
of variable, so they're orthogonal over a different weight function.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LL
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net