Today I Learned

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SUMMARY

This discussion revolves around the concept of daily learning, where participants share various facts and insights they have recently discovered. Key topics include the woodworking technique "oyster veneering," the mathematical fact that 23! equals 25,852,016,738,884,976,640,000, and the medical terms "hyperacusis" and "diplacusis." Participants also touch on humorous observations about life, such as the impact of television on weight and the emotional sensitivity of Barn Owls.

PREREQUISITES
  • Understanding of basic mathematical concepts, specifically factorials.
  • Familiarity with woodworking techniques, particularly historical methods like oyster veneering.
  • Knowledge of medical terminology related to hearing, such as hyperacusis and diplacusis.
  • Awareness of cultural references, including the significance of historical events and figures like Muhammad Ali.
NEXT STEPS
  • Research the historical context and revival of oyster veneering in woodworking.
  • Explore advanced mathematical concepts related to factorials and their applications.
  • Investigate the medical conditions hyperacusis and diplacusis, including their causes and treatments.
  • Learn about the emotional behaviors of animals, particularly Barn Owls and their sensitivity.
USEFUL FOR

This discussion is beneficial for woodworking enthusiasts, mathematicians, medical professionals, and animal behaviorists, as well as anyone interested in the quirky facts of daily life.

  • #4,351
TIL that there are at least eight levels of minor league baseball.
 
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Physics news on Phys.org
  • #4,354
TIL the trebuchet was invented in China circa the 4th century B.C. .
 
  • #4,355
During the last several days I have been learning the Lebesgue integration theory for functions with values in a Banach space by S.Lang's "Real Analysis". The narration is pretty nice and clear.
Since the construction is very general it does not rely on accidental things like an order in the space of values. This straightens the structure.
 
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  • #4,356
wrobel said:
During the last several days I have been learning the Lebesgue integration theory for functions with values in a Banach space by S.Lang's "Real Analysis". The narration is pretty nice and clear.
Since the construction is very general it does not rely on accidental things like an order in the space of values. This straightens the structure.
Is your picture Von Neumann?
 
  • #4,357
pinball1970 said:
Is your picture Von Neumann?
C. S. Lewis
 
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  • #4,358
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  • #4,359
Oldman too said:
I will read all those links. No passwords? That seems crazy!
 
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  • #4,360
pinball1970 said:
I will read all those links. No passwords? That seems crazy!
They authenticate using your phone. We do this at the hospital.
 
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  • #4,361
DaveC426913 said:
They authenticate using your phone. We do this at the hospital.
Not keen though Dave.
 
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  • #4,362
DaveC426913 said:
They authenticate using your phone. We do this at the hospital.
Same with most banks.
 
  • #4,363
pinball1970 said:
I will read all those links. No passwords? That seems crazy!
Sounds risky on first look, the links explain it pretty well though. The hackers are already at a work around for this unless I miss my guess. Still it is an improvement over the current system, we'll see soon enough.
 
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  • #4,364
pinball1970 said:
Not keen though Dave.
? You mean you don't like it?

I have hundreds of passwords. If I haven't been back to somewhere in over six months I have to reset it.

Oldman too said:
Same with most banks.
Not mine yet.

I confess, I did not like it at first - having to have a second device handy. But now I always have my phone, so it's not such a hardship.
 
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  • #4,365
TIL there are ##\LaTeX## coffee stains!
1651804041136.png

1651804014568.png
 
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  • #4,366
DaveC426913 said:
Not mine yet.
Sorry, I should have specified, that only applies to bank employees. My granddaughter works in a bank and it's their default authentication for all employees. Seems to work great for them. There seems to be a fallback recovery method should you lose your phone.

DaveC426913 said:
I confess, I did not like it at first - having to have a second device handy. But now I always have my phone, so it's not such a hardship.
I'm not even using it yet personally but I'm rarely without the phone handy, I'll be glad to get rid of password authentication.
 
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  • #4,367
wrobel said:
C. S. Lewis
1651836019646.png


Definitely some likeness
 
  • #4,368
TIL

CS Lewis was actually Irish and had a hatred of the English for a while after coming to England.
He was an atheist and interested in mysticism before converting to Christianity.

John Von Neuman was a very impressive individual! Too much to mention but one thing I noticed reading his wiki page was he had a guard over him while he was dying at a military medical centre.

He was medicated and military was worried about him talking about US secrets as he passed.
 
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  • #4,369
Supposedly, the only question Hilbert asked Von Neumann at his Ph.D. defense was

"In all my years I have never seen such beautiful evening clothes: pray, who is the candidate's tailor”​

 
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  • #4,370
pinball1970 said:
John Von Neuman was a very impressive individual! Too much to mention but one thing I noticed reading his wiki page was he had a guard over him while he was dying at a military medical centre.

He was medicated and military was worried about him talking about US secrets as he passed.
I can not explain that but I feel something not good to pass in such a way.
 
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  • #4,371
His was an ugly death. Some sort of cancer and he knew that his mind was not functioning well.
 
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  • #4,372
pinball1970 said:
CS Lewis was an atheist and interested in mysticism before converting to Christianity.

My favorite book is his last, Til We Have Faces. It's pagan, and about the the meaning of life.
 
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  • #4,373
caz said:
His was an ugly death. Some sort of cancer and he knew that his mind was not functioning well.
He would have been on morphine I would guess. Anyway the list of contributions he made was something else.
Focus on the positives.
 
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  • #4,374
Hornbein said:
My favorite book is his last, Til We Have Faces. It's pagan, and about the the meaning of life.
Not read that only the Narnia books.
 
  • #4,375
Now I have to go find my copies of Perelandra and ... I read in high school and I remember them as almost terrifying, but I'm not sure now why.
 
  • #4,376
DaveC426913 said:
? You mean you don't like it?

I have hundreds of passwords. If I haven't been back to somewhere in over six months I have to reset it.Not mine yet.

I confess, I did not like it at first - having to have a second device handy. But now I always have my phone, so it's not such a hardship.
My system is now part of it! It's just another thing, another layer. I cannot authenticate without my phone. Great!
Solution is simple, make sure you always have your phone available, charged and ready to give up the authentication code.
Just like your car? You need to get to work so just have the car there ready and waiting, it's not as if anything could go wrong between house and work is it?
Thing is the car goes rogue you get a cab to the tram / railway station.
 
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  • #4,377
pinball1970 said:
My system is now part of it! It's just another thing, another layer. I cannot authenticate without my phone. Great!
Solution is simple, make sure you always have your phone available, charged and ready to give up the authentication code.
Just like your car? You need to get to work so just have the car there ready and waiting, it's not as if anything could go wrong between house and work is it?
Thing is the car goes rogue you get a cab to the tram / railway station.
There's no doubt it's not ideal. But we don't have ideal yet.

The question is: overall, is it better than juggling two hundred hackable passwords?
 
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  • #4,378
Oldman too said:
going passwordless
I haven't seen this yet. I do have accounts where I type my password in, then it asks me to give the code they send to my phone. That seems like a good idea; someone breaking into my account needs to know the password and have my phone. For things like bank accounts, social security, medicare... I really do not mind, in fact, I like the added security.
 
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  • #4,379
DaveC426913 said:
There's no doubt it's not ideal. But we don't have ideal yet.

The question is: overall, is it better than juggling two hundred hackable passwords?
Yes Dave but I am not keen. Next it will be a link sent to a different e mail account which I verify via a 7 digit number sent to my phone. Once verified I go through some security steps and I have access to the security platform. This requires a 13 character code with upper lower case number and something else, *. At last now I get clearance to complete the on line profile of 6 step process which verifies my identity with respect to all the stuff I just did. The next step confused me so I was timed out. I need another code but need a different e mail account as the first has now been designated, 'not secure'

IT explained that if I get an authentication code on my phone on a Sunday or three in the morning then it's not from me.
Thank heavens for these people. They hack for fun then get paid to teach companies how to avoid it.
 
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