Set 2 by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Antihydra by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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X-ray tube by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Figure 1.
Toshiba D-088 dental X-ray tube
. Source.
Video 1.
William Coolidge explains medical imaging and X-rays (1940).
Source. Video sponsored by General Electric. A cool insight of this video is that a hot cathode is a more reliable electron source. Previous systems, and presumably including the discovery of X-rays, leftover gas in the tube was used. But this makes things more difficult to control, as we also want to remove as much gas as possible from the vacuum, otherwise electrons collide with the gas and lose energy before hitting the anode.
Video 2.
How Does X ray Tube Works by BiomedEngg
. Source. Describes in particular the rotating cathode method. Interesting observation that this is especially important since the cathode cannot cool quickly due to the vacuum.
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PROMYS Europe 2024 problem set by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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PROMYS Europe application problem set by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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PROMYS Europe problem set answers by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Oxford physics past exam paper by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Oxford mathematics past exam paper by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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@cirosantilli/_file/gmp/gmp/hello.c by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Erbium-doped fiber amplifier by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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This one was a huge advance it seems.
Video 1.
Erbium-doped fiber amplifier by Millennium Technology Prize
. Source.
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X-ray source by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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PROMYS Europe 2024 by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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PROMYS Europe problem set by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Fiber optical amplifier by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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These are pretty cool, they are basically a laser
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GMP example by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Under: gmp.
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PROMYS Europe by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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European PROMYS offshoot hosted at the University of Oxford. Started in 2015.
The structure seems to be: come every day for 6 weeks, one problem sheet per day. Go.
Strongly against giving answer to problem sets... sad, as of 2024: promys-europe.org/students/faq (archive):
When do I get the solutions to the problems on the problem sets?
When you discover them for yourself: on your own or collaborating with other students. Returning students and counsellors and faculty will support and encourage you, but not by giving you the answers (hint: they don't even give hints). What PROMYS Europe does is offer you the tools and structure to enable you to be a creative mathematician.
and:
What rules are there at PROMYS Europe?
They're mostly the ones you'd expect: don't do anything dangerous or illegal, don't divide by zero, don't even try to skip Friday Fun, and don't give anyone solutions to the problem sets (though collaboration is definitely OK).
It does not seem to be the case for the American version however after a quick look: promys.org/programs/promys/for-students/faq/. Sad to see.
Also participants are strongly forbidden from sharing the problem sheets with anyone from outside the program. Ciro Santilli asked a participant face to face if he could take a look, but was told that they are not allowed to share it. So it is a very clear and strict order. Truly sad.
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History of fiber optics by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Fiber-optic communication by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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Optical amplifier by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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These are closely related to lasers, as they do a similar basic job: take a DC source as input and amplify light. Lasers just happen to use the input voltage to also generate the incoming light.
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GNU Multiple Precision Arithmetic Library by Ciro Santilli 34 Updated 2024-12-15 +Created 2024-07-12
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