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Groups > alt.os.linux > #51439 > unrolled thread
| Started by | Nomen Nescio <noreply@mixnym.net> |
|---|---|
| First post | 2018-10-31 20:24 -0500 |
| Last post | 2018-11-08 15:38 +0100 |
| Articles | 20 on this page of 42 — 16 participants |
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Here you go, Apple lovers! Eat this! Nomen Nescio <noreply@mixnym.net> - 2018-10-31 20:24 -0500
Re: Here you go, Apple lovers! Eat this! NumbLock <789456123@0.com> - 2018-10-31 20:20 -0700
Re: Here you go, Apple lovers! Eat this! William Unruh <unruh@invalid.ca> - 2018-11-01 14:40 +0000
Re: Here you go, Apple lovers! Eat this! Andy Burns <usenet@andyburns.uk> - 2018-11-19 08:12 +0000
Re: Here you go, Apple lovers! Eat this! Bobbie Sellers <bliss@mouse-potato.com> - 2018-11-01 07:50 -0700
Re: Here you go, Apple lovers! Eat this! Andy Burns <usenet@andyburns.uk> - 2018-11-01 07:09 +0000
Re: Here you go, Apple lovers! Eat this! nospam <nospam@nospam.invalid> - 2018-11-01 04:02 -0400
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-01 09:24 -0400
Re: Here you go, Apple lovers! Eat this! nospam <nospam@nospam.invalid> - 2018-11-01 09:30 -0400
Re: Here you go, Apple lovers! Eat this! Eric Stevens <eric.stevens@sum.co.nz> - 2018-11-02 11:46 +1300
Re: Here you go, Apple lovers! Eat this! nospam <nospam@nospam.invalid> - 2018-11-01 19:06 -0400
Re: Here you go, Apple lovers! Eat this! Chris <ithinkiam@gmail.com> - 2018-11-02 08:42 +0000
Re: Here you go, Apple lovers! Eat this! William Unruh <unruh@invalid.ca> - 2018-11-02 13:02 +0000
Re: Here you go, Apple lovers! Eat this! Eric Stevens <eric.stevens@sum.co.nz> - 2018-11-03 14:34 +1300
Re: Here you go, Apple lovers! Eat this! William Unruh <unruh@invalid.ca> - 2018-11-01 14:43 +0000
Re: Here you go, Apple lovers! Eat this! Jean-David Beyer <jeandavid8@verizon.net> - 2018-11-01 11:46 -0400
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-01 21:53 -0400
Re: Here you go, Apple lovers! Eat this! Jasen Betts <jasen@xnet.co.nz> - 2018-11-02 04:23 +0000
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-02 01:45 -0400
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-02 02:16 -0400
Re: Here you go, Apple lovers! Eat this! Nomen Nescio <noreply@mixnym.net> - 2018-11-01 08:45 -0500
Re: Here you go, Apple lovers! Eat this! Andy Burns <usenet@andyburns.uk> - 2018-11-01 15:00 +0000
Re: Here you go, Apple lovers! Eat this! John Hasler <jhasler@newsguy.com> - 2018-11-01 11:27 -0500
Re: Here you go, Apple lovers! Eat this! Nomen Nescio <noreply@mixnym.net> - 2018-11-01 15:25 -0500
Re: Here you go, Apple lovers! Eat this! Nomen Nescio <nobody@dizum.com> - 2018-11-08 10:06 +0100
Re: Here you go, Apple lovers! Eat this! Jean-David Beyer <jeandavid8@verizon.net> - 2018-11-08 08:11 -0500
Re: Here you go, Apple lovers! Eat this! John Hasler <jhasler@newsguy.com> - 2018-11-08 08:37 -0600
Re: Here you go, Apple lovers! Eat this! William Unruh <unruh@invalid.ca> - 2018-11-09 16:49 +0000
Re: Here you go, Apple lovers! Eat this! "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2018-11-09 15:25 -0600
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-10 00:42 -0500
Re: Here you go, Apple lovers! Eat this! Eric Stevens <eric.stevens@sum.co.nz> - 2018-11-09 13:56 +1300
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-01 22:04 -0400
Re: Here you go, Apple lovers! Eat this! Andy Burns <usenet@andyburns.uk> - 2018-11-02 06:41 +0000
Re: Here you go, Apple lovers! Eat this! Paul <nospam@needed.invalid> - 2018-11-02 04:20 -0400
Re: Here you go, Apple lovers! Eat this! Bobbie Sellers <bliss@mouse-potato.com> - 2018-11-02 05:51 -0700
Re: Here you go, Apple lovers! Eat this! The Natural Philosopher <tnp@invalid.invalid> - 2018-11-02 19:47 +0000
Re: Here you go, Apple lovers! Eat this! Wolf K <wolfmac@sympatico.ca> - 2018-11-02 16:31 -0400
Re: Here you go, Apple lovers! Eat this! The Natural Philosopher <tnp@invalid.invalid> - 2018-11-02 21:14 +0000
Re: Here you go, Apple lovers! Eat this! William Unruh <unruh@invalid.ca> - 2018-11-02 13:06 +0000
Re: Here you go, Apple lovers! Eat this! John Hasler <jhasler@newsguy.com> - 2018-11-02 07:19 -0500
Re: Here you go, Apple lovers! Eat this! John Hasler <jhasler@newsguy.com> - 2018-11-02 07:15 -0500
Re: Here you go, Apple lovers! Eat this! Nomen Nescio <nobody@dizum.com> - 2018-11-08 15:38 +0100
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| From | Nomen Nescio <noreply@mixnym.net> |
|---|---|
| Date | 2018-11-01 08:45 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prf025$bdr$1@news.mixmin.net> |
| In reply to | #51441 |
Andy Burns explained : > Nomen Nescio wrote: > >> Why a Helium Leak Disabled Every iPhone in a Medical Facility > > Wonder if the Helium affected the MEMS barometers in non-Apple > devices? > > Maybe accelerometers, and compasses too, but I can't see why those > couldn't be airtight. The article says that it didn't affect Android devices.
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| From | Andy Burns <usenet@andyburns.uk> |
|---|---|
| Date | 2018-11-01 15:00 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <g40io8FhpuqU2@mid.individual.net> |
| In reply to | #51446 |
Nomen Nescio wrote: > Andy Burns explained : > >> Nomen Nescio wrote: >> >>> Why a Helium Leak Disabled Every iPhone in a Medical Facility >> >> Wonder if the Helium affected the MEMS barometers in non-Apple devices? >> >> Maybe accelerometers, and compasses too, but I can't see why those >> couldn't be airtight. > > The article says that it didn't affect Android devices. It would take android devices to have MEMS resonators instead of crystal oscillators for them to be affected in the same way, but plenty of non iThings have MEMS devices in one form or another. I'm not clear why an oscillator would be "open" to the atmosphere, whereas a barometer would need to be.
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| From | John Hasler <jhasler@newsguy.com> |
|---|---|
| Date | 2018-11-01 11:27 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <87tvl03grg.fsf@dhh.gt.org> |
| In reply to | #51453 |
Andy Burns writes: > I'm not clear why an oscillator would be "open" to the atmosphere, > whereas a barometer would need to be. They weren't open. They were sealed, and most likely contained either a vacuum or a specific gas. However, helium diffuses through everything at an astounding rate, and something about these particular parts made them especially susceptible to small amounts of helium. It probably changed the velocity of sound inside the device just enough to screw it up. Other brands of oscillator might also have been affected but if they merely shifted off frequency a bit no one would have noticed. It's also possible that these oscillators didn't stop either, but shifted frequency enough to cause the operating system to become alarmed and/or confused. -- John Hasler jhasler@newsguy.com Dancing Horse Hill Elmwood, WI USA
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| From | Nomen Nescio <noreply@mixnym.net> |
|---|---|
| Date | 2018-11-01 15:25 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prfngq$j3j$1@news.mixmin.net> |
| In reply to | #51457 |
After serious thinking John Hasler wrote : > Andy Burns writes: >> I'm not clear why an oscillator would be "open" to the atmosphere, >> whereas a barometer would need to be. > > They weren't open. They were sealed, and most likely contained > either a vacuum or a specific gas. However, helium diffuses through > everything at an astounding rate, and something about these > particular parts made them especially susceptible to small amounts of > helium. It probably changed the velocity of sound inside the device > just enough to screw it up. Other brands of oscillator might also > have been affected but if they merely shifted off frequency a bit no > one would have noticed. > > It's also possible that these oscillators didn't stop either, but > shifted frequency enough to cause the operating system to become > alarmed and/or confused. I wonder how many Apple people have followed their bad oscillator apps off a cliff so far? This brings up an idea for a new hack. Get in front of a self driving car and open up a helium bottle.
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| From | Nomen Nescio <nobody@dizum.com> |
|---|---|
| Date | 2018-11-08 10:06 +0100 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <22e74d03a685164db55f9c8f9bd9bc5e@dizum.com> |
| In reply to | #51461 |
In article <prfngq$j3j$1@news.mixmin.net> Nomen Nescio <noreply@mixnym.net> wrote: > > After serious thinking John Hasler wrote : > > Andy Burns writes: > >> I'm not clear why an oscillator would be "open" to the atmosphere, > >> whereas a barometer would need to be. > > > > They weren't open. They were sealed, and most likely contained > > either a vacuum or a specific gas. However, helium diffuses through > > everything at an astounding rate, and something about these > > particular parts made them especially susceptible to small amounts of > > helium. It probably changed the velocity of sound inside the device > > just enough to screw it up. Other brands of oscillator might also > > have been affected but if they merely shifted off frequency a bit no > > one would have noticed. > > > > It's also possible that these oscillators didn't stop either, but > > shifted frequency enough to cause the operating system to become > > alarmed and/or confused. > > I wonder how many Apple people have followed their bad oscillator > apps off a cliff so far? > > This brings up an idea for a new hack. Get in front of a self > driving car and open up a helium bottle. helium rises...
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| From | Jean-David Beyer <jeandavid8@verizon.net> |
|---|---|
| Date | 2018-11-08 08:11 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <ps1cld027bv@news1.newsguy.com> |
| In reply to | #51533 |
On 11/8/18 4:06 AM, Nomen Nescio wrote: > helium rises... So what: in a mixture of gasses, they stay mixed due to Brownian movement. -- .~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key:166D840A 0C610C8B Registered Machine 1935521. /( )\ Shrewsbury, New Jersey http://linuxcounter.net ^^-^^ 08:05:01 up 29 days, 16:48, 2 users, load average: 4.42, 4.26, 4.11
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| From | John Hasler <jhasler@newsguy.com> |
|---|---|
| Date | 2018-11-08 08:37 -0600 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <877ehn1vpq.fsf@dhh.gt.org> |
| In reply to | #51535 |
Jean-David Beyer writes: > So what: in a mixture of gasses, they stay mixed due to Brownian > movement. The helium isn't mixed with the air when it comes out of the bottle. The plume of helium will tend to rise the same way a plume of hot air does. However, if you direct the jet of helium under the car... -- John Hasler jhasler@newsguy.com Dancing Horse Hill Elmwood, WI USA
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| From | William Unruh <unruh@invalid.ca> |
|---|---|
| Date | 2018-11-09 16:49 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <ps4dq0$me$1@dont-email.me> |
| In reply to | #51535 |
On 2018-11-08, Jean-David Beyer <jeandavid8@verizon.net> wrote: > On 11/8/18 4:06 AM, Nomen Nescio wrote: >> helium rises... > > So what: in a mixture of gasses, they stay mixed due to Brownian movement. When it escapes it is NOT a mixture. It is pure He, and that blob rises. Even if it is mixed the He tends to go to the top ( which is one of the reason the earth's atmosphere has no He or H since they rise to the top of the atmosphere and escape). Just like you are advised to crawl in a fire because the hot air and hot combustion gases rise because they are (only slightly) less dense than cold air. He is 1/8 the density of air. >
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| From | "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> |
|---|---|
| Date | 2018-11-09 15:25 -0600 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <20181109152537.5e1c6930@WizardsTower> |
| In reply to | #51555 |
On Fri, 9 Nov 2018 16:49:04 -0000 (UTC) William Unruh <unruh@invalid.ca> wrote: > He is 1/8 the > density of air. Thank you for that. Cybe R. Wizard -- My other computer is a HOLMES IV
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| From | Paul <nospam@needed.invalid> |
|---|---|
| Date | 2018-11-10 00:42 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <ps5r3f$ll4$1@dont-email.me> |
| In reply to | #51562 |
Cybe R. Wizard wrote:
> On Fri, 9 Nov 2018 16:49:04 -0000 (UTC)
> William Unruh <unruh@invalid.ca> wrote:
>
>> He is 1/8 the
>> density of air.
>
> Thank you for that.
>
> Cybe R. Wizard
And what of Hydrogen ?
Won't anyone think of the Hydrogen ?
I was burned by Hydrogen once. And the
hydrogen explosion (a separate event), just
lifted the floor sbove my head... a little bit.
And none of my family members came running, to see
what happened. That was the strangest event
of all.
*******
Come to think of it, I got an important empirical
result there. The hydrogen did stay as a cloud
near the ceiling. When I was in the process of
"burning off the excess for safety", the container
I was working with was still evolving a tiny amount
of hydrogen. And normally, I'd burn off the hydrogen
before anything nasty happened. In that case, I
waited a little too long to tend to it, and there
was a cloud over my head (that you can't see). (The
experiment was initially done outdoors for safety,
but I decided to bring it inside to disassemble it,
on the assumption the reaction had run to completion.
Bad assumption. Bad maintenance procedure.)
Eventually, the experiments with Hydrogen... stopped.
The Tevatron results here suggested that small gases
like that, they disperse and form a uniform
concentration from top to bottom, inside the
enclosure (room, building). But mine only had
time to float to the ceiling, and wasn't all
that dispersed.
http://lss.fnal.gov/archive/2005/conf/fermilab-conf-05-635-ad.pdf
"The tests showed that gases, more readily than
expected, diffused through an air column in the
direction opposing buoyancy."
https://en.wikipedia.org/wiki/Graham%27s_law
Well, that's save me buying a copy of Fluent.
Paul
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| From | Eric Stevens <eric.stevens@sum.co.nz> |
|---|---|
| Date | 2018-11-09 13:56 +1300 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <7pm9udht4helpit8lt9rhg5rgksiuq6tka@4ax.com> |
| In reply to | #51533 |
On Thu, 8 Nov 2018 10:06:47 +0100 (CET), Nomen Nescio <nobody@dizum.com> wrote: >In article <prfngq$j3j$1@news.mixmin.net> >Nomen Nescio <noreply@mixnym.net> wrote: >> >> After serious thinking John Hasler wrote : >> > Andy Burns writes: >> >> I'm not clear why an oscillator would be "open" to the atmosphere, >> >> whereas a barometer would need to be. >> > >> > They weren't open. They were sealed, and most likely contained >> > either a vacuum or a specific gas. However, helium diffuses through >> > everything at an astounding rate, and something about these >> > particular parts made them especially susceptible to small amounts of >> > helium. It probably changed the velocity of sound inside the device >> > just enough to screw it up. Other brands of oscillator might also >> > have been affected but if they merely shifted off frequency a bit no >> > one would have noticed. >> > >> > It's also possible that these oscillators didn't stop either, but >> > shifted frequency enough to cause the operating system to become >> > alarmed and/or confused. >> >> I wonder how many Apple people have followed their bad oscillator >> apps off a cliff so far? >> >> This brings up an idea for a new hack. Get in front of a self >> driving car and open up a helium bottle. > >helium rises... Helium plumbate? -- Regards, Eric Stevens
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| From | Paul <nospam@needed.invalid> |
|---|---|
| Date | 2018-11-01 22:04 -0400 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prgbbg$dne$1@dont-email.me> |
| In reply to | #51457 |
John Hasler wrote:
> Andy Burns writes:
>> I'm not clear why an oscillator would be "open" to the atmosphere,
>> whereas a barometer would need to be.
>
> They weren't open. They were sealed, and most likely contained either a
> vacuum or a specific gas. However, helium diffuses through everything
> at an astounding rate, and something about these particular parts made
> them especially susceptible to small amounts of helium. It probably
> changed the velocity of sound inside the device just enough to screw it
> up. Other brands of oscillator might also have been affected but if
> they merely shifted off frequency a bit no one would have noticed.
>
> It's also possible that these oscillators didn't stop either, but
> shifted frequency enough to cause the operating system to become alarmed
> and/or confused.
They're passivated with polysilicon on top.
(There is mention of a 1000C annealing process.)
And a thin coating of polymer over that.
I was looking to see if it had a breather hole
for pressure equalization, but it doesn't appear to
have that.
The dimensions of the device mean not a lot of
material can be dedicated to a hermetic seal.
It's like a speck of pepper, and the internal part
might be the item at the bottom of this picture.
1.5 mm x 0.8 mm CSP
0.6 mm max height
0.3mm ball diameter (four electrical contacts)
https://m.eet.com/images/eetimes/2016/03/1329232/rcj_SiTime_MEMS_1.png
Paul
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| From | Andy Burns <usenet@andyburns.uk> |
|---|---|
| Date | 2018-11-02 06:41 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <g429tlFsrivU1@mid.individual.net> |
| In reply to | #51468 |
Paul wrote: > John Hasler wrote: > >> Andy Burns writes: >> >>> I'm not clear why an oscillator would be "open" to the atmosphere >> >> They were sealed, and most likely contained either a >> vacuum or a specific gas. However, helium diffuses through everything >> at an astounding rate > > They're passivated with polysilicon on top. > (There is mention of a 1000C annealing process.) > And a thin coating of polymer over that. Anyone would think crystal oscillators were hard to make :-P <https://youtu.be/b--FKHCFjOM>
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| From | Paul <nospam@needed.invalid> |
|---|---|
| Date | 2018-11-02 04:20 -0400 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prh1ci$eh1$1@dont-email.me> |
| In reply to | #51473 |
Andy Burns wrote:
> Paul wrote:
>
>> John Hasler wrote:
>>
>>> Andy Burns writes:
>>>
>>>> I'm not clear why an oscillator would be "open" to the atmosphere
>>>
>>> They were sealed, and most likely contained either a
>>> vacuum or a specific gas. However, helium diffuses through everything
>>> at an astounding rate
>>
>> They're passivated with polysilicon on top.
>> (There is mention of a 1000C annealing process.)
>> And a thin coating of polymer over that.
>
> Anyone would think crystal oscillators were hard to make :-P
>
> <https://youtu.be/b--FKHCFjOM>
But are they really certain the frequency is correct ?
Maybe they should check it one... more... time... :-)
*******
And that was like, an elfen safety horror movie.
Did you spot all the naughty things they did ?
Doing Xray diffraction/crystallography with a
fluoroscope ? Yikes. No pension benefits needed
for that person. Of course, they also used to have
shoe Xray machines in department stores. But this
was back in the era when they didn't know any better.
https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope
Paul
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| From | Bobbie Sellers <bliss@mouse-potato.com> |
|---|---|
| Date | 2018-11-02 05:51 -0700 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prhh7o$q8v$1@dont-email.me> |
| In reply to | #51475 |
On 11/2/18 1:20 AM, Paul wrote: > Andy Burns wrote: >> Paul wrote: >> >>> John Hasler wrote: >>> >>>> Andy Burns writes: >>>> >>>>> I'm not clear why an oscillator would be "open" to the atmosphere >>>> >>>> They were sealed, and most likely contained either a >>>> vacuum or a specific gas. However, helium diffuses through everything >>>> at an astounding rate >>> >>> They're passivated with polysilicon on top. >>> (There is mention of a 1000C annealing process.) >>> And a thin coating of polymer over that. >> >> Anyone would think crystal oscillators were hard to make :-P >> >> <https://youtu.be/b--FKHCFjOM> > > But are they really certain the frequency is correct ? > > Maybe they should check it one... more... time... :-) > > ******* > > And that was like, an elfen safety horror movie. > Did you spot all the naughty things they did ? > > Doing Xray diffraction/crystallography with a > fluoroscope ? Yikes. No pension benefits needed > for that person. Of course, they also used to have > shoe Xray machines in department stores. But this > was back in the era when they didn't know any better. > > https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope > > Paul Well I was too young in the 1940s to know that wiggling my toes inside my new shoes was anything but fun watching them on the fluoroscope. Some adult always switched it off before I had seen enough. bliss -- bliss dash SF 4 ever at dslextreme dot com
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| From | The Natural Philosopher <tnp@invalid.invalid> |
|---|---|
| Date | 2018-11-02 19:47 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <pri9l5$r4p$1@dont-email.me> |
| In reply to | #51479 |
On 02/11/2018 12:51, Bobbie Sellers wrote: > On 11/2/18 1:20 AM, Paul wrote: >> But this >> was back in the era when they didn't know any better. >> Back in the days when they knew better ITYM Current Elfin Safety on radiation is probably about 1000 times overcautious. >> https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope >> >> Paul > > Well I was too young in the 1940s to know that > wiggling my toes inside my new shoes was anything but > fun watching them on the fluoroscope. Some adult always > switched it off before I had seen enough. > Indeed. I had a cat scan last month. Probably enough radiation to set every alarm bell ringing in a nuclear power station. Certainly more than a year living in Fukushima or Chernobyl exclusions zones. https://xkcd.com/radiation/ -- The biggest threat to humanity comes from socialism, which has utterly diverted our attention away from what really matters to our existential survival, to indulging in navel gazing and faux moral investigations into what the world ought to be, whilst we fail utterly to deal with what it actually is.
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| From | Wolf K <wolfmac@sympatico.ca> |
|---|---|
| Date | 2018-11-02 16:31 -0400 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <Cu2DD.438837$MN2.424347@fx02.iad> |
| In reply to | #51494 |
On 2018-11-02 15:47, The Natural Philosopher wrote: > On 02/11/2018 12:51, Bobbie Sellers wrote: >> On 11/2/18 1:20 AM, Paul wrote: >>> But this >>> was back in the era when they didn't know any better. >>> > Back in the days when they knew better ITYM > > Current Elfin Safety on radiation is probably about 1000 times > overcautious. > >>> https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope >>> >>> Paul >> >> Well I was too young in the 1940s to know that >> wiggling my toes inside my new shoes was anything but >> fun watching them on the fluoroscope. Some adult always >> switched it off before I had seen enough. >> > > Indeed. I had a cat scan last month. Probably enough radiation to set > every alarm bell ringing in a nuclear power station. > > Certainly more than a year living in Fukushima or Chernobyl exclusions > zones. > > https://xkcd.com/radiation/ CAT machines use sensors, not film, hence don't require nearly as much radiation as film needed. But I don't know how much less, sorry. Best, -- Wolf K kirkwood40.blogspot.com "Gentics is not genealogy." (Gragham Coop, Ph.D.)
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| From | The Natural Philosopher <tnp@invalid.invalid> |
|---|---|
| Date | 2018-11-02 21:14 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prienb$rl1$1@dont-email.me> |
| In reply to | #51496 |
On 02/11/2018 20:31, Wolf K wrote: > On 2018-11-02 15:47, The Natural Philosopher wrote: >> On 02/11/2018 12:51, Bobbie Sellers wrote: >>> On 11/2/18 1:20 AM, Paul wrote: >>>> But this >>>> was back in the era when they didn't know any better. >>>> >> Back in the days when they knew better ITYM >> >> Current Elfin Safety on radiation is probably about 1000 times >> overcautious. >> >>>> https://en.wikipedia.org/wiki/Shoe-fitting_fluoroscope >>>> >>>> Paul >>> >>> Well I was too young in the 1940s to know that >>> wiggling my toes inside my new shoes was anything but >>> fun watching them on the fluoroscope. Some adult always >>> switched it off before I had seen enough. >>> >> >> Indeed. I had a cat scan last month. Probably enough radiation to set >> every alarm bell ringing in a nuclear power station. >> >> Certainly more than a year living in Fukushima or Chernobyl exclusions >> zones. >> >> https://xkcd.com/radiation/ > > CAT machines use sensors, not film, hence don't require nearly as much > radiation as film needed. But I don't know how much less, sorry. > That link says how much they generate. more . TONS more. Because they take a complete picture of your insides which is seconds of radiation. 10mSv says this article https://www.radiologyinfo.org/en/info.cfm?pg=safety-xray Now if you look at Fukushima exclusion, that’s at around 2mSv/year Well below background on e.g. Dartmoor UK (up to 10msV/yr) or indeed Ramsar in Iran (up to 200msV/yr) If I can find this out so too could you have done. > Best, > -- It’s easier to fool people than to convince them that they have been fooled. Mark Twain
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| From | William Unruh <unruh@invalid.ca> |
|---|---|
| Date | 2018-11-02 13:06 +0000 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <prhi4d$rh1$3@dont-email.me> |
| In reply to | #51473 |
On 2018-11-02, Andy Burns <usenet@andyburns.uk> wrote: > Paul wrote: > >> John Hasler wrote: >> >>> Andy Burns writes: >>> >>>> I'm not clear why an oscillator would be "open" to the atmosphere >>> >>> They were sealed, and most likely contained either a >>> vacuum or a specific gas. However, helium diffuses through everything >>> at an astounding rate >> >> They're passivated with polysilicon on top. >> (There is mention of a 1000C annealing process.) >> And a thin coating of polymer over that. > > Anyone would think crystal oscillators were hard to make :-P They are hard to make very very small. > ><https://youtu.be/b--FKHCFjOM>
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| From | John Hasler <jhasler@newsguy.com> |
|---|---|
| Date | 2018-11-02 07:19 -0500 |
| Subject | Re: Here you go, Apple lovers! Eat this! |
| Message-ID | <874lcz3c5m.fsf@dhh.gt.org> |
| In reply to | #51473 |
Andy Burns writes: > Anyone would think crystal oscillators were hard to make :-P Quartz crystals are too big, and you can't simply scale them down. -- John Hasler jhasler@newsguy.com Dancing Horse Hill Elmwood, WI USA
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