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On 16/03/2023 3:49 am, Commander Kinsey wrote:
They\'re identical, there has only ever been one way of measuring it.
Compare live and neutral. They just keep changing the name for
marketing purposes.
No, not necessarily, many ELCBs were voltage operated. You can read up
on what makes ELCB different to RCD. Wikipedia has entries for you.
On 19/03/2023 16:40, Commander Kinsey wrote:
On Wed, 08 Mar 2023 11:33:34 -0000, Max Demian <max_demian@bigfoot.com
wrote:
On 08/03/2023 06:08, Commander Kinsey wrote:
On Tue, 28 Feb 2023 17:28:35 -0000, Max Demian
max_demian@bigfoot.com
wrote:
On 28/02/2023 15:55, John Larkin wrote:
Human cone cells come in three wavelengths, roughly r-g-b, so if we
name more colors it\'s arbitrary.
https://en.wikipedia.org/wiki/Cone_cell
From the diagram on the right, it\'s more like blue, greeny-yellow
and
yellow if you measure the sensitivities at different frequencies.
I call bullshit. If the lowest frequency detector was yellow, how do
we
see red? And why does the RGB system on TVs work so well?
(a) The frequencies represent the peaks of the curves. You will see
from
the diagram that both of the yellow sensitive cones have tails that
extend well into the red. We see red by comparing the relative levels
of
the two. People with only one type of yellow cone can\'t do this, which
is why they can\'t tell red from green.
Look at this graph:
https://www.ncbi.nlm.nih.gov/books/NBK11059/figure/A766/?report=objectonly
Look at the bright red. It\'s off the scale for even the 559nm cone.
Yet red is easy to see and very vivid. The graph is obviously wrong,
if the graph was correct, we shouldn\'t be able to pick up red much at
all.
We discern red by comparing the relative stimulation of the three cones.
Think about what colours on that graph are the most prominent. I see
5. Purple, blue, green, yellow, red. So I\'d say either:
(Most people would say violet, but there isn\'t much difference.)
So what about orange? Don\'t you see orange? (People used not to have a
word for it before the fruit was imported.)
Note that I said \"discern\" above, not \"see\". There are tests involving
putting coloured tiles in order (online versions are available); most
people can *distinguish\" between 30 and 40 different colours. Clearly we
don\'t have 30 different kinds of cone.
As well as distinguishing colours in a test, there is the question of
how many spectral colours we regard as distinct. This is a subjective
matter, dependant on culture, occupation and whether we have names for
the colours. For example, I can see that orange is a bit reddish and a
bit yellowish, but (to me) it has a distinct quality of orangeyness.
I\'ve tried, but I can\'t honestly see indigo as a distinct colour; it\'s
more like an intermediate between violet and blue. (We are only taught
that indigo is a colour of the spectrum thanks to Newton and his liking
for the number seven.)
We have 5 cones, purple, blue, green, yellow, red - but I\'m sure
doctors would notice we had 5.
We have 3 cones, purple, green, red. The 5 vivid colours I mentioned
above are when we either see it mostly with one cone, or equally with 2
cones.
Having cones where the graph shows them doesn\'t make any sense.
It does fit in with our knowledge of how colour vision likely evolved in
us and other primates. Other mammals have just two kinds of cones: blue
and yellow and effectively have red/green colour-blindness. The gene for
the yellow cone could have duplicated and one copy mutated so that it
responded to a slightly different wavelength of light. This was perhaps
useful in our ancestors at it would enable us to distinguish red fruit
from green leaves, or ripe from unripe fruit.
The retention of red/green colour-blindness in some people could be
because such distinctions aren\'t all that important,
or it could be that such colour-blindness defeats the camouflage that
some predators adopted.
On Wed, 15 Mar 2023 16:07:21 -0000, Ian Jackson
ianREMOVETHISjackson@g3ohx.co.uk> wrote:
In message <op.11uqo0s7mvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> writes
On Tue, 28 Feb 2023 13:53:01 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 28/02/2023 11:37, Commander Kinsey wrote:
On Sat, 18 Feb 2023 21:57:43 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
I remember reading an ancient book on building your own radio, and they
mentioned regenerative receivers with only a single valve. Some would
emit back on the receiving antena, so they said don\'t do this, it is
illegal and nasty on your neighbours. Better use two valves, isolating
the oscillator from the antena.
https://en.wikipedia.org/wiki/Regenerative_circuit
Sounds like a good way to annoy a neighbour you hate and prevent them
listening to the radio station you don\'t like.
People got used to hearing squeals in the early evening when people were
tuning their radios in. Just as, later, people listening on long wave
got used to the whistling interference from 405 line TVs.
How come I remember a whine on LW and I was born in 1975?
Two things happened around those times.
405 was 10.125kHz. 625 timebase is 15.625kHz.
Droitwich moved from 200kHz to 198kHz.
Also, there would have been a lot of 405 sets still around.
I\'ll let you check whether a whistle was possible.
Er.... LW is 150 to 270 kHz, nothing like 10.125kHz or 15.625kHz.
Droitwich is either a spa or a transmitter which would have transmitted
all frequencies used, not just 200 or 198kHz.
Your point?
Interesting. I wonder who decided that was the modern Greek palette. I was thinking of the color schemes that show up in photos of Greece.
https://www.dunnedwards.com/pros/blog/were-loving-these-3-color-schemes-inspired-by-greece/
The Goldenrod/Go-Go Green motif looks like the aftermath of a discontinued colors paint sale at Hoem Depot.
https://greeking.me/blog/greek-culture/white-blue-greek-colors
Aha, right again!
\"Well, that has to do with cost. After painting their boat, the fishers and other sailors painted their windows and shutters with whatever was leftover. And because of the elements used to create it, blue was usually the cheapest paint color.\"
On Mon, 20 Mar 2023 23:58:33 +1100, Max Demian <max_demian@bigfoot.com
wrote:
The retention of red/green colour-blindness in some people could be
because such distinctions aren\'t all that important,
or it could be that such colour-blindness defeats the camouflage that
some predators adopted.
Can\'t see why that would be. More likely that those who aren\'t
colorblind would be able to see the prey better than the color
blind,
but that doesnt explain why color blind is much more
common in men.
In message <op.11uqo0s7mvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> writes
On Tue, 28 Feb 2023 13:53:01 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 28/02/2023 11:37, Commander Kinsey wrote:
On Sat, 18 Feb 2023 21:57:43 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
I remember reading an ancient book on building your own radio, and
they
mentioned regenerative receivers with only a single valve. Some would
emit back on the receiving antena, so they said don\'t do this, it is
illegal and nasty on your neighbours. Better use two valves, isolating
the oscillator from the antena.
https://en.wikipedia.org/wiki/Regenerative_circuit
Sounds like a good way to annoy a neighbour you hate and prevent them
listening to the radio station you don\'t like.
People got used to hearing squeals in the early evening when people were
tuning their radios in. Just as, later, people listening on long wave
got used to the whistling interference from 405 line TVs.
How come I remember a whine on LW and I was born in 1975?
Two things happened around those times.
405 was 10.125kHz. 625 timebase is 15.625kHz.
Droitwich moved from 200kHz to 198kHz.
Also, there would have been a lot of 405 sets still around.
I\'ll let you check whether a whistle was possible.
On 21/03/2023 02:10, Rod Speed wrote:
On Mon, 20 Mar 2023 23:58:33 +1100, Max Demian <max_demian@bigfoot.com
wrote:
The retention of red/green colour-blindness in some people could be
because such distinctions aren\'t all that important,
or it could be that such colour-blindness defeats the camouflage that
some predators adopted.
Can\'t see why that would be. More likely that those who aren\'t
colorblind would be able to see the prey better than the color
blind,
The extra colours have a confusing effect.
Have you looked at the colour blindness test books, the ones with lots
of colour dots where you have to tell which numbers are there? There\'s
one which only colour-blind people can work out as it has wavy red and
green lines.
but that doesnt explain why color blind is much more
common in men.
This is because the gene for the extra yellowish cones (don\'t know which
one) is on the X chromosome and men only have one of those. If the gene
is faulty you only have two working cones; women have two X chromosomes
and provided one has the working gene they are all right.
In message <op.114fnnmqmvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> writes
On Wed, 15 Mar 2023 16:07:21 -0000, Ian Jackson
ianREMOVETHISjackson@g3ohx.co.uk> wrote:
In message <op.11uqo0s7mvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> writes
On Tue, 28 Feb 2023 13:53:01 -0000, Max Demian
max_demian@bigfoot.com> wrote:
On 28/02/2023 11:37, Commander Kinsey wrote:
On Sat, 18 Feb 2023 21:57:43 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
I remember reading an ancient book on building your own radio,
and they
mentioned regenerative receivers with only a single valve. Some
would
emit back on the receiving antena, so they said don\'t do this, it is
illegal and nasty on your neighbours. Better use two valves,
isolating
the oscillator from the antena.
https://en.wikipedia.org/wiki/Regenerative_circuit
Sounds like a good way to annoy a neighbour you hate and prevent them
listening to the radio station you don\'t like.
People got used to hearing squeals in the early evening when people
were
tuning their radios in. Just as, later, people listening on long wave
got used to the whistling interference from 405 line TVs.
How come I remember a whine on LW and I was born in 1975?
Two things happened around those times.
405 was 10.125kHz. 625 timebase is 15.625kHz.
Droitwich moved from 200kHz to 198kHz.
Also, there would have been a lot of 405 sets still around.
I\'ll let you check whether a whistle was possible.
Er.... LW is 150 to 270 kHz, nothing like 10.125kHz or 15.625kHz.
Droitwich is either a spa or a transmitter which would have
transmitted all frequencies used, not just 200 or 198kHz.
Your point?
Harmonics, dear boy, harmonics.
In message <op.11uqo0s7mvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> writes
On Tue, 28 Feb 2023 13:53:01 -0000, Max Demian <max_demian@bigfoot.com> wrote:
On 28/02/2023 11:37, Commander Kinsey wrote:
On Sat, 18 Feb 2023 21:57:43 -0000, Carlos E.R.
robin_listas@es.invalid> wrote:
I remember reading an ancient book on building your own radio, and they
mentioned regenerative receivers with only a single valve. Some would
emit back on the receiving antena, so they said don\'t do this, it is
illegal and nasty on your neighbours. Better use two valves, isolating
the oscillator from the antena.
https://en.wikipedia.org/wiki/Regenerative_circuit
Sounds like a good way to annoy a neighbour you hate and prevent them
listening to the radio station you don\'t like.
People got used to hearing squeals in the early evening when people were
tuning their radios in. Just as, later, people listening on long wave
got used to the whistling interference from 405 line TVs.
How come I remember a whine on LW and I was born in 1975?
Two things happened around those times.
405 was 10.125kHz. 625 timebase is 15.625kHz.
Droitwich moved from 200kHz to 198kHz.
Also, there would have been a lot of 405 sets still around.
I\'ll let you check whether a whistle was possible.
On Thu, 16 Mar 2023 18:20:35 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Mon, 13 Mar 2023 02:05:11 -0000, rbowman <bowman@montana.com> wrote:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:
On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:
On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:
Why were they never made of something more grippy than highly polished
steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math.
If I did the maths I\'d get a more complete answer.
A fully laden coal car weighs about 140 tons. I\'ve never been
bored enough to count cars when I stopped at a crossing but there are a
lot of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000 tons
traveling at 50 mph. That\'s quite a bit of kinetic energy to dump in 300\'.
I can hear snapping axles and see flying wheels.
But there are many wheels.
A fully laden truck/lorry/whatever you call them over there can\'t stop as quick as a car, but it can stop in a safe distance. A train cannot, it\'s not fit for purpose. If something unexpected happens, it just ploughs through it. Trains are outdated technology and it\'s high time we got rid of them. Maybe a maglev can stop quicker?
Trains are about 5x as efficient as trucks for moving stuff.
In article <op.11wvwlpsmvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> wrote:
On Mon, 13 Mar 2023 02:05:11 -0000, rbowman <bowman@montana.com> wrote:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:
On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:
On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:
Why were they never made of something more grippy than highly
polished steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math.
If I did the maths I\'d get a more complete answer.
A fully laden coal car weighs about 140 tons. I\'ve never been bored
enough to count cars when I stopped at a crossing but there are a lot
of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000
tons traveling at 50 mph. That\'s quite a bit of kinetic energy to dump
in 300\'. I can hear snapping axles and see flying wheels.
But there are many wheels.
A fully laden truck/lorry/whatever you call them over there can\'t stop as
quick as a car, but it can stop in a safe distance. A train cannot, it\'s
not fit for purpose. If something unexpected happens, it just ploughs
through it. Trains are outdated technology and it\'s high time we got rid
of them. Maybe a maglev can stop quicker?
Trains run on private tracks and make their own rules
On 16/03/2023 19:51, charles wrote:
In article <op.11wvwlpsmvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> wrote:
On Mon, 13 Mar 2023 02:05:11 -0000, rbowman <bowman@montana.com> wrote:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:
On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:
On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:
Why were they never made of something more grippy than highly
polished steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math.
If I did the maths I\'d get a more complete answer.
A fully laden coal car weighs about 140 tons. I\'ve never been bored
enough to count cars when I stopped at a crossing but there are a lot
of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000
tons traveling at 50 mph. That\'s quite a bit of kinetic energy to dump
in 300\'. I can hear snapping axles and see flying wheels.
But there are many wheels.
A fully laden truck/lorry/whatever you call them over there can\'t stop as
quick as a car, but it can stop in a safe distance. A train cannot, it\'s
not fit for purpose. If something unexpected happens, it just ploughs
through it. Trains are outdated technology and it\'s high time we got rid
of them. Maybe a maglev can stop quicker?
Trains run on private tracks and make their own rules
More to the point, railway tracks are normally fenced off and it is
illegal for the public to access them except at level crossings
which have lights/barriers to exclude the public when a train is approaching
or require those crossing to check that it is safe to do so (visually
for pedestrians or by phoning the signal box for vehicles).
Unlike
roads, no one without specific authorisation should be on the tracks at
all, so trains should not need to stop suddenly.
Depends which statistic you believe. And trains can only go where there
are tracks, so much loading and unloading and messing about at both
ends.
On Thu, 16 Mar 2023 23:14:56 -0000, SteveW <steve@walker-family.me.uk> wrote:
On 16/03/2023 19:51, charles wrote:
In article <op.11wvwlpsmvhs6z@ryzen.home>, Commander Kinsey
CK1@nospam.com> wrote:
On Mon, 13 Mar 2023 02:05:11 -0000, rbowman <bowman@montana.com> wrote:
On Mon, 13 Mar 2023 00:30:39 -0000, Commander Kinsey wrote:
On Thu, 02 Mar 2023 03:09:14 -0000, rbowman <bowman@montana.com> wrote:
On Wed, 01 Mar 2023 15:05:31 -0000, Commander Kinsey wrote:
Why were they never made of something more grippy than highly
polished steel?
https://en.wikipedia.org/wiki/Mount_Washington_Cog_Railway
Should be used on all tracks, then perhaps trains could stop in the
distance my car is required to by law.
Do the math.
If I did the maths I\'d get a more complete answer.
A fully laden coal car weighs about 140 tons. I\'ve never been bored
enough to count cars when I stopped at a crossing but there are a lot
of them. Let\'s say 30 for the sake of argument, 4200 tons plus the
weight of the engines. Let\'s say 4 at 200 tons each. So, roughly 5000
tons traveling at 50 mph. That\'s quite a bit of kinetic energy to dump
in 300\'. I can hear snapping axles and see flying wheels.
But there are many wheels.
A fully laden truck/lorry/whatever you call them over there can\'t stop as
quick as a car, but it can stop in a safe distance. A train cannot, it\'s
not fit for purpose. If something unexpected happens, it just ploughs
through it. Trains are outdated technology and it\'s high time we got rid
of them. Maybe a maglev can stop quicker?
Trains run on private tracks and make their own rules
More to the point, railway tracks are normally fenced off and it is
illegal for the public to access them except at level crossings
A law to prevent you hurting yourself is silly.
Of course we all went on the tracks as kids.
I got busted for putting coins on a track to be smashed flat. They
tooks us into the station office. We got a lecture, catch-and-release.
Cindy Hamilton <hamilton@invalid.com> writes:
On 2023-03-08, rbowman <bowman@montana.com> wrote:
On Wed, 08 Mar 2023 06:08:29 -0000, Commander Kinsey wrote:
I wonder why women tend to be more colour fussy? Are they being fussy
or accurate?
They are willing to utter the bullshit names marketers come up with to
describe colors.
I prefer to use the names assigned by Crayola.
The canonical source for color naming is Pantone.
https://en.wikipedia.org/wiki/Pantone
On Wed, 08 Mar 2023 17:49:45 GMT, Cindy Hamilton wrote:
https://en.wikipedia.org/wiki/Color_chart
I\'m happy with the RGB value.
One of the available theme for our product really is teal, so called. I
coded in #008080 and it wasn\'t a match. I hunted down the programmer and
asked wtf?
not very gently. Turns out his boss didn\'t like the color
everybody else calls teal so he screwed around with the values until he
got something that was acceptable and called it teal.
There are two other sort of blueish choices that I can barely distinguish.
Another product had strange color combination until I figured out it was
the flag of India.