Province of China Updated 2025-07-16
Stack Overflow link-only answer policy Updated 2025-07-16
The link will break, and the answer will lose. Or the person who summarizes inline will get more upvotes because people are lazy to click the link. Also, web archiving exists.
This is especially idiotic when it is a link to another post in Stack Overflow itself.
1922 Nobel Prize in Physics Updated 2025-07-16
Niels Bohr for the Bohr model.
1944 Nobel Prize in Physics Updated 2025-07-16
Age of Empires Updated 2025-07-16
Age of Empires II Updated 2025-07-16
Classification of second order partial differential equations into elliptic, parabolic and hyperbolic Updated 2025-07-16
One major application of this classification is that different boundary conditions are suitable for different types of partial differential equations as explained at: which boundary conditions lead to existence and uniqueness of a second order PDE.
Classification of simple Lie groups Updated 2025-07-16
A bit like the classification of simple finite groups, they also have a few sporadic groups! Not as spectacular since as usual continuous problems are simpler than discrete ones, but still, not bad.
Udacity Updated 2025-07-16
It is a shame that they refocused to more applied courses. This also highlights their highly "managed" approach to content creation. Their 2022 pitch on front page says it all:they are focused on the highly paid character of many software engineering jobs.
for as few as 10 hours a week, you can get the in-demand skills you need to help land a high-paying tech job
But one cool point of this website is how they hire tutors to help on the courses. This is a very good thing. It is a fair way of monetizing: e-learning websites must keep content free, only charge for certification.
AKS primality test Updated 2025-07-16
x86 Paging Tutorial TLB replacement policy Updated 2025-07-16
When TLB is filled up, older addresses are overwritten. Just like CPU cache, the replacement policy is a potentially complex operation, but a simple and reasonable heuristic is to remove the least recently used entry (LRU).
With LRU, starting from state:adding
valid linear physical
----- ------ --------
> 1 00003 00005
1 00007 00009
1 00009 00001
1 0000B 000030000D -> 0000A would give: valid linear physical
----- ------ --------
1 0000D 0000A
> 1 00007 00009
1 00009 00001
1 0000B 00003 Internet privacy organizations Updated 2025-07-16
U-Math Updated 2025-07-16
Weekend Updated 2025-07-16
XP School Updated 2025-07-16
Amazing self-directed learning direction:
world.hey.com/gwyn/no-excuses-bc4152fb mentions that the founder was inspired by other schools: High Tech High and Expeditionary Learning.
Lots of focus on showcase student work.
The founder Gwyn ap Harri is quite dirty mouthed, which is also cool.
Ciro Santilli tried to contact them in 2021 at: twitter.com/cirosantilli/status/1448924419016036353 and on website contact form to see if we could do some project together, but no reply.
Allegory Updated 2025-07-16
Billy Mitchell (gamer) Updated 2025-07-16
Electrolysis Updated 2025-07-16
Open instant messaging protocols Updated 2025-07-16
Robert Noyce Updated 2025-07-16
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