Math and electrical desgin

[Rick C]

On Thursday, April 2, 2020 at 2:32:56 AM UTC-4, Bill Sloman wrote:

On Thursday, April 2, 2020 at 8:03:35 AM UTC+11, Rick C wrote:
On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias. Roman
buildings were generally of very good quality and simply lasted a long
time. Similar with some of the northern European building types but not
all of them. The most stunning construction method I saw was Scottish.. I
once rented the top floor of a house near Aberdeen that was built from
huge granite blocks. Almost indestructible. However, the owners (who
lived on the first floor) said there was slight radio activity emanating
from those blocks. Neither he nor anyone else was concerned about that
and since Scots have a good average life span it seems not to matter much.

Why would there be a problem? The key word there is "slight". Background radiation is not uniform. It varies from place to place. Granite in particular has radioactive content. So do glow in the dark dial watches. It was only the ladies painting them who licked their brushes who developed problems.

There is a problem

https://www.mskcc.org/blog/5-myths-about-radon-and-lung

There's also a cheap solution, which is to use a fan to suck the radon-loaded air out of the basement fast enough that the radon gets diluted down to a safe level by the outside air being sucked in through the walls and ventilation.

This has been well known for quite a while.

Radon in any appreciable quantities doesn't come from buildings made of granite. It comes from the ground as a gas and collects in basements and other living spaces. If granite were breathable, that might be a problem as well. Since it's not castle dwellers can life rich long lives.

--

Rick C.

+-- Get 1,000 miles of free Supercharging
+-- Tesla referral code - https://ts.la/richard11209

 

[Bill Sloman]

On Thursday, April 2, 2020 at 6:16:33 PM UTC+11, Rick C wrote:

On Thursday, April 2, 2020 at 2:32:56 AM UTC-4, Bill Sloman wrote:
On Thursday, April 2, 2020 at 8:03:35 AM UTC+11, Rick C wrote:
On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias. Roman
buildings were generally of very good quality and simply lasted a long
time. Similar with some of the northern European building types but not
all of them. The most stunning construction method I saw was Scottish. I
once rented the top floor of a house near Aberdeen that was built from
huge granite blocks. Almost indestructible. However, the owners (who
lived on the first floor) said there was slight radio activity emanating
from those blocks. Neither he nor anyone else was concerned about that
and since Scots have a good average life span it seems not to matter much.

Why would there be a problem? The key word there is "slight". Background radiation is not uniform. It varies from place to place. Granite in particular has radioactive content. So do glow in the dark dial watches. It was only the ladies painting them who licked their brushes who developed problems.

There is a problem

https://www.mskcc.org/blog/5-myths-about-radon-and-lung

There's also a cheap solution, which is to use a fan to suck the radon-loaded air out of the basement fast enough that the radon gets diluted down to a safe level by the outside air being sucked in through the walls and ventilation.

This has been well known for quite a while.

Radon in any appreciable quantities doesn't come from buildings made of granite. It comes from the ground as a gas and collects in basements and other living spaces. If granite were breathable, that might be a problem as well. Since it's not castle dwellers can life rich long lives.

If they pull the radon-loaded air out of the basement, they'll live longer, if you collect statistics for long enough, and over enough dwelling, to get a reliable result.

--
Bill Sloman, Sydney

 

[Tom Gardner]

On 01/04/20 22:03, Rick C wrote:

On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias. Roman
buildings were generally of very good quality and simply lasted a long
time. Similar with some of the northern European building types but not all
of them. The most stunning construction method I saw was Scottish. I once
rented the top floor of a house near Aberdeen that was built from huge
granite blocks. Almost indestructible. However, the owners (who lived on
the first floor) said there was slight radio activity emanating from those
blocks. Neither he nor anyone else was concerned about that and since Scots
have a good average life span it seems not to matter much.

Why would there be a problem? The key word there is "slight". Background
radiation is not uniform. It varies from place to place. Granite in
particular has radioactive content. So do glow in the dark dial watches. It
was only the ladies painting them who licked their brushes who developed
problems.

Not negligible, unless you are reckless

There are houses in the UK where the radon content increases
the risk of lung cancer about as much as smoking a pack of
fags every day.

See where: https://www.ukradon.org/information/ukmaps

 

[Rick C]

On Thursday, April 2, 2020 at 4:00:44 AM UTC-4, Tom Gardner wrote:

On 01/04/20 22:03, Rick C wrote:
On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias. Roman
buildings were generally of very good quality and simply lasted a long
time. Similar with some of the northern European building types but not all
of them. The most stunning construction method I saw was Scottish. I once
rented the top floor of a house near Aberdeen that was built from huge
granite blocks. Almost indestructible. However, the owners (who lived on
the first floor) said there was slight radio activity emanating from those
blocks. Neither he nor anyone else was concerned about that and since Scots
have a good average life span it seems not to matter much.

Why would there be a problem? The key word there is "slight". Background
radiation is not uniform. It varies from place to place. Granite in
particular has radioactive content. So do glow in the dark dial watches. It
was only the ladies painting them who licked their brushes who developed
problems.

Not negligible, unless you are reckless

I think you said that backwards.

There are houses in the UK where the radon content increases
the risk of lung cancer about as much as smoking a pack of
fags every day.

See where: https://www.ukradon.org/information/ukmaps

Yep, but granite doesn't not equal radon.

--

Rick C.

+-+ Get 1,000 miles of free Supercharging
+-+ Tesla referral code - https://ts.la/richard11209

 

[Tom Gardner]

On 02/04/20 07:32, Bill Sloman wrote:

On Thursday, April 2, 2020 at 8:03:35 AM UTC+11, Rick C wrote:
On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias. Roman
buildings were generally of very good quality and simply lasted a long
time. Similar with some of the northern European building types but not
all of them. The most stunning construction method I saw was Scottish. I
once rented the top floor of a house near Aberdeen that was built from
huge granite blocks. Almost indestructible. However, the owners (who
lived on the first floor) said there was slight radio activity emanating
from those blocks. Neither he nor anyone else was concerned about that
and since Scots have a good average life span it seems not to matter much.

Why would there be a problem? The key word there is "slight". Background radiation is not uniform. It varies from place to place. Granite in particular has radioactive content. So do glow in the dark dial watches. It was only the ladies painting them who licked their brushes who developed problems.

There is a problem

https://www.mskcc.org/blog/5-myths-about-radon-and-lung

There's also a cheap solution, which is to use a fan to suck the radon-loaded air out of the basement fast enough that the radon gets diluted down to a safe level by the outside air being sucked in through the walls and ventilation.

This has been well known for quite a while.

Yes. A local researcher was influential in understanding the
risks, back in the late 80s.
http://www.childhoodcancer2018.org.uk/speakers/denis-henshaw.asp

I live in an area with a notable risk, but have extremely
good underfloor ventilation!

 

[David Brown]

On 02/04/2020 09:16, Rick C wrote:

On Thursday, April 2, 2020 at 2:32:56 AM UTC-4, Bill Sloman wrote:
On Thursday, April 2, 2020 at 8:03:35 AM UTC+11, Rick C wrote:
On Wednesday, April 1, 2020 at 3:58:29 PM UTC-4, Joerg wrote:

I wouldn't have brought it up if it was due to survivor bias.
Roman buildings were generally of very good quality and simply
lasted a long time. Similar with some of the northern European
building types but not all of them. The most stunning
construction method I saw was Scottish. I once rented the top
floor of a house near Aberdeen that was built from huge granite
blocks. Almost indestructible. However, the owners (who lived
on the first floor) said there was slight radio activity
emanating from those blocks. Neither he nor anyone else was
concerned about that and since Scots have a good average life
span it seems not to matter much.

Why would there be a problem? The key word there is "slight".
Background radiation is not uniform. It varies from place to
place. Granite in particular has radioactive content. So do
glow in the dark dial watches. It was only the ladies painting
them who licked their brushes who developed problems.

There is a problem

https://www.mskcc.org/blog/5-myths-about-radon-and-lung

There's also a cheap solution, which is to use a fan to suck the
radon-loaded air out of the basement fast enough that the radon
gets diluted down to a safe level by the outside air being sucked
in through the walls and ventilation.

This has been well known for quite a while.

Radon in any appreciable quantities doesn't come from buildings made
of granite. It comes from the ground as a gas and collects in
basements and other living spaces. If granite were breathable, that
might be a problem as well. Since it's not castle dwellers can life
rich long lives.

Yes. The background radiation (from the radon) does not come from the
granite the houses are made from - it comes from the granite in the
ground the houses are built on. Radiation from granite blocks
themselves is measurable, but of no noticeable health effect.

The solution - extractor fans in the basement - is correct. We have
them in many places in Norway.

 

[Gerhard Hoffmann]

Am 03.04.20 um 21:20 schrieb Joerg:

I learned at the age of 7-10 years which things to ignore. For example,
that statements such as "no serviceable parts inside" and "bicycling
prohibited" ought to be ignored

And "NO EXIT" means you can get out there.

cheers, Gerhard

 

[Joerg]

On 2020-03-29 19:21, Bill Sloman wrote:

On Monday, March 30, 2020 at 12:37:53 PM UTC+11, Clifford Heath
wrote:

[...]

Cats don't need to be taught to hunt - but they do need to be
taught *how* to hunt. People don't need to be taught to invent -
but they can be taught *how* to invent.

Human language acquisition is mostly working out how everybody in the
immediate vicinity uses language. The way you listen to language is
heavily influenced by the language (or languages) you heard when you
were an infant. The first six months are devoted to learning which
features you can ignore.

I learned at the age of 7-10 years which things to ignore. For example,
that statements such as "no serviceable parts inside" and "bicycling
prohibited" ought to be ignored

--
Regards, Joerg

http://www.analogconsultants.com/

 

[bitrex]

On 3/29/2020 11:12 PM, Phil Allison wrote:

Phil Hobbs wrote:
On 2020-03-29 21:25, Phil Allison wrote:
Bill Sloman wrote:

-------------------


Please spare me.

Phil Hobbs makes money out of collaborating with John Larkin - collaborating with an egomaniac isn't easy.


** I was unaware of that - explains a lot of the crap going on here.

So Hobbs is not just an arrogant prick Septic, he's a paid cock-sucker too.

Maybe they need to get a room....

The concept of having friends must be new to you,

** Ridiculous.


JL and I are friends and occasional collaborators,


** No - you are a lot more here.

There is collaboration and then there is conspiracy.

The latter is what criminals engage in.

The cap bloody fits you both.


FYI:

Septic (tank) is rhyming slang for Yank.

But the obvious implication also fits only too well.



..... Phil

Look, all I'm sayin' is that Boston women are, on the whole, a paler,
uglier sort than women from the elsewheres of life.

<https://youtu.be/bgfDALzpfJU?t=17>

 

[John Larkin]

On Fri, 03 Apr 2020 12:20:58 -0700, Joerg <news@analogconsultants.com>
wrote:

On 2020-03-29 19:21, Bill Sloman wrote:
On Monday, March 30, 2020 at 12:37:53 PM UTC+11, Clifford Heath
wrote:

[...]

Cats don't need to be taught to hunt - but they do need to be
taught *how* to hunt. People don't need to be taught to invent -
but they can be taught *how* to invent.

Human language acquisition is mostly working out how everybody in the
immediate vicinity uses language. The way you listen to language is
heavily influenced by the language (or languages) you heard when you
were an infant. The first six months are devoted to learning which
features you can ignore.



I learned at the age of 7-10 years which things to ignore. For example,
that statements such as "no serviceable parts inside" and "bicycling
prohibited" ought to be ignored

Datasheet abs max ratings are just suggestions.

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[Joerg]

On 2020-04-03 12:30, Gerhard Hoffmann wrote:

Am 03.04.20 um 21:20 schrieb Joerg:

I learned at the age of 7-10 years which things to ignore. For
example, that statements such as "no serviceable parts inside" and
"bicycling prohibited" ought to be ignored

And "NO EXIT" means you can get out there.

I did that yesterday on the mountain bike, mud flinging off the tires
and all. Milliseconds later I saw a sheriff's SUV but luckily its
flashing lights didn't come on.

--
Regards, Joerg

http://www.analogconsultants.com/

 

[Phil Hobbs]

On 2020-04-03 15:20, Joerg wrote:

On 2020-03-29 19:21, Bill Sloman wrote:
On Monday, March 30, 2020 at 12:37:53 PM UTC+11, Clifford Heath
wrote:

[...]

Cats don't need to be taught to hunt - but they do need to be
taught *how* to hunt. People don't need to be taught to invent -
but they can be taught *how* to invent.

Human language acquisition is mostly working out how everybody in the
immediate vicinity uses language. The way you listen to language is
heavily influenced by the language (or languages) you heard when you
were an infant. The first six months are devoted to learning  which
features you can ignore.



I learned at the age of 7-10 years which things to ignore. For example,
that statements such as "no serviceable parts inside" and "bicycling
prohibited" ought to be ignored

You're getting in touch with your inner Woody Guthrie!

"As I was walking,
I saw a sign there
It was painted, "Priv't prop'ty
But on the back side it didn't say nothing;
This land was made for you and me."

You live in California, so I suppose it was inevitable.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Joerg]

On 2020-04-03 15:22, Phil Hobbs wrote:

On 2020-04-03 15:20, Joerg wrote:
On 2020-03-29 19:21, Bill Sloman wrote:
On Monday, March 30, 2020 at 12:37:53 PM UTC+11, Clifford Heath
wrote:

[...]

Cats don't need to be taught to hunt - but they do need to be
taught *how* to hunt. People don't need to be taught to invent -
but they can be taught *how* to invent.

Human language acquisition is mostly working out how everybody in the
immediate vicinity uses language. The way you listen to language is
heavily influenced by the language (or languages) you heard when you
were an infant. The first six months are devoted to learning which
features you can ignore.



I learned at the age of 7-10 years which things to ignore. For
example, that statements such as "no serviceable parts inside" and
"bicycling prohibited" ought to be ignored


You're getting in touch with your inner Woody Guthrie!

"As I was walking,
I saw a sign there
It was painted, "Priv't prop'ty
But on the back side it didn't say nothing;
This land was made for you and me."

You live in California, so I suppose it was inevitable.

I live in the part of California where people wear the law on their
belts

No kidding, yesterday on my mountain bike I saw three people trotting
down a highway on horseback.

--
Regards, Joerg

http://www.analogconsultants.com/

 

Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> wrote in
news:r682sl$cqh$1@solani.org:

Am 03.04.20 um 21:20 schrieb Joerg:

I learned at the age of 7-10 years which things to ignore. For
example, that statements such as "no serviceable parts inside"
and "bicycling prohibited" ought to be ignored

And "NO EXIT" means you can get out there.

cheers, Gerhard

We need a mental institution built at the edge of a tall cliff,
with one of those doors. Then, Donald John Trump, and his son, and
his son in law, and his daughter can all be taken there for a
commital tour. Change the sign to "Gold Plated Golf Course This Way"

Might as well throw 50 blind senators in that tour too. Let's not
forget Giuliani, desperately trying to make himself look good amid
all of his utter stupidity. Pompeo, Barr, Nunes, McConnell... yeah,
there is a lot of SHIT that needs to be shoveled into a nice
transport plane for a ride down to their new residences at GITMO!

There needs to be a sign put over the door at the White House...
"No Dangerous Buffoons!", which, if it had been there, our Secret
Service, whom does not ignore their oaths, would have taken out the
trash on day one. Let one of their family members get nailed by this
thing, and maybe we will get to see 'one' 'special event' where the
recipient deserved it... and Oh LOOK... 2020 A Zero YEAR!!!

If anybody deserves it, the murderous, negligent, incompetent
Donald John Trump is the guy.