Determine absorption spectrum of body

[Archimedes' Lever]

You've missed everything including an education dimbulb. I'm a Biomedical
Technologist and have work in the field for 11 years, I know what I am
talking about, you're just a fucking idiot who is always wrong.

I made hypo-hyperthemia machines 25 years ago for the bio-med industry.

Just so you know, nothing (and I do mean NOTHING) about that niche of
the electronics industry makes you anywhere near capable of modeling,
testing, or properly determining these figures. You are a guess as you
go asshole that wants the world to believe that because you know how to
look up a table of current susceptibilities that you are some kind of
fucking expert.It doesn't, and you aren't.

Oh boy... 11 fucking years. You're a real expert... NOT!

I spent 6 years actually *developing* a high voltage power supply that
was meant for human contact and medical use. It gets used in an inhaler
device made by Battelle Pharma.

It had a limit requisite of 20uA, but we limited our 15kV design to
11uA. I know more about it that you ever will.

You have no fucking clue how much I know about humans and electron
flow. You are just another fucking idiot who has no clue. You worked on
*some gear* for the last eleven years. I actually designed real circuits
that were meant for direct human contact, and had very stringent
guidelines to follow, and even produced new information for the industry.

If you were any more clueless, I'd swear that you were Roy.

"I'm a biomedical technologist..."

Bwuahahahahahahahahahaha! How funny! Like that matters, tech tard.

 

[Archimedes' Lever]

You're probably right. I guess it would be capacitive pickup. Antenna is
the wrong term.

Shaun

Imagine that. The "technologist" errs.

You're not a scientist. You're a dopey little bastard scientist wanna
be.

 

[[email protected]]

I made hypo-hyperthemia machines 25 years ago for the bio-med industry.

"You made", IOW, you're a tech, or perhaps an assembler. Coming from you,
that makes sense. The manufacturing work went to Asia and you're now the
night janitor.

BTW, AlwaysWrong, what is a "hypo-hyperthemia" machine?

Just so you know, nothing (and I do mean NOTHING) about that niche of
the electronics industry makes you anywhere near capable of modeling,
testing, or properly determining these figures. You are a guess as you
go asshole that wants the world to believe that because you know how to
look up a table of current susceptibilities that you are some kind of
fucking expert.It doesn't, and you aren't.

"Modeling"? "These figures"? I suppose you would know everything about
Barbie Dolls.

Oh boy... 11 fucking years. You're a real expert... NOT!

I spent 6 years actually *developing* a high voltage power supply that
was meant for human contact and medical use. It gets used in an inhaler
device made by Battelle Pharma.

You misspelled "Mattel", DimBulb. Barbie is from Mattel.

It had a limit requisite of 20uA, but we limited our 15kV design to
11uA. I know more about it that you ever will.

You have no fucking clue how much I know about humans and electron
flow.

We *all* know you're AlwaysWrong. That's enough.

You are just another fucking idiot who has no clue.

Wel *all* know you never have a clue, AlwaysWrong.

You worked on *some gear* for the last eleven years.

You worked on *some toilets* for the last forty years, DimBulb.

I actually designed real circuits
that were meant for direct human contact, and had very stringent
guidelines to follow, and even produced new information for the industry.
AlwaysWrong.

If you were any more clueless, I'd swear that you were Roy.

If you were as clueless as you show yourself to be daily, I'd say you were
AlwaysWrong. Oh,...

"I'm a biomedical technologist..."

Bwuahahahahahahahahahaha! How funny! Like that matters, tech tard.

Laughing at yourself again, I see, DimBulb. You should see someone about
that. You're sick, not funny.

 

[Archimedes' Lever]

snipped long line.

Pages 615 and 616. Sheesh back at'cha.

Fig 4 is sort of the config the op is referring to. I think.

A human body is, after all, a bag full of salty water. Conduction is
ionic, so it doesn't behave like a pure resistor.

John

LIKE "a bag full of salty water".

Blood, conducts quite well with salt being the main reason, but there
are other compounds involved as well, so I don't know if calling blood
'ionic' is too correct.

The 'diagram' your citation shows looks largely resistive to me.

There were a LOT of resistors, in fact.

I'd venture to say that the little RC models are mainly for and
including the skin.

Human skin is HUGELY variable. Just ask any polygraphists.

We are mostly resistive. Pretty simple shit.

 

[Grant]

To be more specific, let's say I feed a pre-recorded audio white noise
track to a step-up transformer, output applied at a safe level via two
skin electrodes.

From two other electrodes I record the output. This is processed in
software back to the same amplitude as the orginal noise signal.

One is then inverted and mixed with the other to provide a difference
signal.

My interest is to see how this changes under varying conditions,
elctrode placement, etc.

Any further comments regarding the practicalities of this would be
appreciated.

Would you believe that sounds like a process I've read about being used
for determining state of charge of lead acid batteries? You get back a
fingerprint of the internal impedance. No tape of course, but feeding
a complex pseudo random waveform (lots of frequencies together) can show
up the changes you may be looking for. Use a repeatable noise sequence
for the tests.

Interpretation is something else though. That's the magical bit, making
sense of the 'noise'. Lots of work to correlate the trials to show you
are finding something useful. I don't have a clue where to go for that,
sounds more like computation than measurement.

Grant.

 

[Shaun]

Imagine that. The "technologist" errs.

You're not a scientist. You're a dopey little bastard scientist wanna
be.

We all make mistakes, look at your parents - they had you which I'm sure was
an acident. Your daddy probably tried to stick his lilttle dick in the
wrong hole. Your parents were probably related before they were married, I
wouldn't doubt brother and sister. You should have never been born, you
were probably the ugliest baby around. The doctor tried to declair you
still born because you were so fucking ugly, but them you cried. Your the
reason that condoms became popular.

I've typed at you before and you alway **** up the details / number, you're
always wrong. Were did you get you engineering papers - a cracker jack box?

 

[The Great Attractor]

It's sure not metallic conduction, unless you're RoboCop.

John

It sure isn't capacitively or inductively reactive either.

Like lightning, when a salt has a conduction chain (path) set up 'in'
it, it conducts better, a bit akin to plasma.

That is why a lightning strike will use a particular 'vein' down a
tree to Earth, as opposed to the entire the trunk mass, even though the
"conductivity" of any given part of the trunk was pretty even. Baked
tree conducts better then fresh tree. So the entire stroke follows one
path through the tree.

The word for today is "caramelized".

Bwuahahahahahaha!

 

[Ronnie Jäger]

I would like to experimentally determine the absorption spectrum of a

human body by applying low current white noise, via skin electrodes,
at one anatomical location and monitoring at another.

I did something similar for my diploma thesis. However, I was not using
white noise, but a frequency sweep from 10 kHz to 1 MHz. This made the
equipment much easier (DDS generator, voltage controlled current source,
I/Q demodulator and slow ADC).
The method is called bioimpedance spectroscopy and you will find some
information about it on the net. There is also a commercially available
device for it, made by Xitron.

Through subtractive mixing, one might then obtain a unique energy
signature for that individual. IOW the effect of non-linearities and
resonance.

You will get Cole-Cole diagrams. It is essential to measure the complex
impedance instead of the resistive component only. You can then make a
curve fit to determine the parameters of your mathmatical model.

Is this worth trying?

Depends on what you are hoping to get...

If so, what are the relevant technical considerations?

The medical safety norm EN-60601. IIRC, it says I < 1 mA for f < 10 kHz,
I < 10 mA for f < 1 MHz.

 

[legg]

I would like to experimentally determine the absorption spectrum of a
human body by applying low current white noise, via skin electrodes,
at one anatomical location and monitoring at another.

Through subtractive mixing, one might then obtain a unique energy
signature for that individual. IOW the effect of non-linearities and
resonance.

Is this worth trying?

If so, what are the relevant technical considerations?

Bruce Epstein

I don't think we need another method of determining people's identity.

Perhaps you could turn your thoughts towards something more medically
beneficial?

RL

 

[The_Giant_Rat_of_Sumatra]

We all make mistakes,

Yes. Like the one I made where I failed to feed you a fast moving chunk
of lead.

look at your parents

Unlike you, pussy boy, I no longer live at home.

- they had you which I'm sure was
an acident.

If you could spell, I might not have been "sure" that you are nothing
more than an adolescent brained, learned not a goddamned thing in school,
gang boy punk fucktard!

Your daddy probably tried to stick his lilttle dick in the
wrong hole.

Your mental age is 11. If your numerical age is twice that or more,
you qualify as a retard. What is your numerical age?

Your parents were probably related before they were married,

Is you Daddy feeding you these jokes? Is he as stupid as you are?
Or did you get this stupid hanging around other retarded fucks just like
yourself?

Your mother should be jailed as a felon for the heinous crime of
failing to flush your retarded ass, the moment the retarded crack whore
shat you out of her retarded slut ass.

I
wouldn't doubt brother and sister.

If that were true, I would still be three orders of magnitude more
intelligent than you are.

You should have never been born,

At least I was born. You were shat, by a felonious whore.

you
were probably the ugliest baby around.

Are you listening to how immature you are being, little boy?
It borders on hilarity.

The doctor tried to declair you
still born because you were so fucking ugly, but them you cried.

How would a retarded punk **** like you, that wasn't even a dribble of
fly scum yet, know?

Your the
reason that condoms became popular.

YOU'RE the reason people like me want all dumbfucks like you guarding
gang members in a prison that neither you nor the gang members ever get
to leave. That is all a dolt like you is good for.

I've typed at you before

You are a true fucking dork. It doesn't get any more retarded than a
pissy little teen aged twit in the group acting like he has a brain.

and you alway **** up the details

Says the dopey **** that has made no less than four spelling errors in
this very thread alone? Bwuahahahahahah! Sure, bub.

/ number, you're
always wrong. Were did you get you engineering papers - a cracker jack box?

FIVE spelling errors. At least I have an engineering degree. All you
have is jealous desire for something you do not have the brains to ever
get. You are a circus flea in this group, at best.

 

[Archimedes' Lever]

"You made", IOW, you're a tech, or perhaps an assembler.

It was 35 years ago, idiot.

Coming from you,
that makes sense.

Coming from you, this further proves that your brain has a self imposed
retardation mindset.

The manufacturing work went to Asia and you're now the
night janitor.

They take you down directly in the blood now, by placing the chilling
rod right in your artery. Within minutes, the body temp can be brought
down to 34°F. The machine I made was used for decades and they were all
made right here in the US. They cool the body by way of blankets with
the chill water running through them, and the machine chilled the water,
and would heat it back up after the operation.

Williams, you are an idiot. That has been true, every time I ever said
it about you, and it is usually after you make a fool of yourself with
stupid posts like the above. Wallow in it, boy.

 

[Archimedes' Lever]

BTW, AlwaysWrong, what is a "hypo-hyperthemia" machine?

Are you so retarded that you do not know how to google something?

**** off. Your stupid, incorrect reference will no longer be
addressed.

 

[[email protected]]

It was 35 years ago, idiot.

Right. You're a janitor, now.

Coming from you, this further proves that your brain has a self imposed
retardation mindset.

AlwaysWrong is always wrong.

They take you down directly in the blood now, by placing the chilling
rod right in your artery. Within minutes, the body temp can be brought
down to 34°F. The machine I made was used for decades and they were all
made right here in the US. They cool the body by way of blankets with
the chill water running through them, and the machine chilled the water,
and would heat it back up after the operation.

You're already below room temperature, DimBulb. You were born that way.

Williams, you are an idiot. That has been true, every time I ever said
it about you, and it is usually after you make a fool of yourself with
stupid posts like the above. Wallow in it, boy.

Everyone here knows you're wrong, AlwaysWrong. Always.

 

[[email protected]]

Are you so retarded that you do not know how to google something?

**** off. Your stupid, incorrect reference will no longer be
addressed.

It's about time you left, AlwaysWrong!