Type-II superconductor Updated +Created
Figure 1.
Sketch of the typical superconducting phase diagram of a Type-II superconductor
. Source.
Agilent Technologies oscilloscope Updated +Created
Closure table Updated +Created
Free university Updated +Created
Related projects:
Krusader Updated +Created
The most powerful GUI file manager ever?? Infinite configurability??
Ciro Santilli wasted some time on it before he gave up on file managers altogether and started using only the CLI with a few aliases.
Lagrange's four-square theorem Updated +Created
Music teenager Ciro Santilli liked to listen to Updated +Created
Lower teens, before discovering more hardcore stuff that is more genial and adult-venerable:So a base mix of what you migth expect from a regular male teenager born in 1989 Brazil.
OK, Ciro still comes back to those from time to time, he confesses. Nostalgia, nostalgia.
The following are also adult venerable though :-)
Video 1.
Killing In the Name by Rage Against The Machine (1992)
Source.
As mentioned on Wikipedia, it has only 8 lines of lyrics.
And the most satisfying "Ugh"s ever recorded on tape. Rap rock perfectly describes the genre.
Nash equilibrium Updated +Created
The best example to look at first is the penalty kick left right Nash equilibrium.
Then, a much more interesting example is choosing a deck of a TCG competition: Magic: The Gathering meta-based deck choice is a bimatrix game, which is the exact same, but each player has N choices rather than 2.
The next case that should be analyzed is the prisoner's dilemma.
The key idea is that:
  • imagine that the game will be played many times between two players
  • if one player always chooses one deck, the other player will adapt by choosing the anti-deck
  • therefore, the best strategy for both players, is to pick decks randomly, each with a certain probability. This type of probabilistic approach is called a mixed strategy
  • if any player deviates from the equilibrium probability, then the other player can add more of the anti-deck to the deck that the other player deviated, and gain an edge
    Therefore, using equilibrium probabilities is the optimal way to play
Neil Fernandez Updated +Created
“Especially my father. He was doing most of it and he is a savoury, strong character. He has strong beliefs about the world and in himself, and he was helping me a lot, even when I was at university as an undergraduate.”
An only child, Arran was born in 1995 in Glasgow, where his parents were studying at the time. His father has Spanish lineage, having a great grandfather who was a sailor who moved from Spain to St Vincent in the Carribean. A son later left the islands for the UK where he married an English woman. Arran’s mother is Norwegian.
“My father was writing and my mother is an economist. They both worked from home which also made things easier,” Arran says.
A bit like what Ciro Santilli feels about himself!
One of the articles says his father has a PhD. TODO where did he work? What's his PhD on? Photo: www.topfoto.co.uk/asset/1357880/
www.thetimes.co.uk/article/the-everyday-genius-pxsq5c50kt9:
Neil, a political economist, attended state and private schools in Hampshire but was also taught for a period at home by his mother.
It’s strange because for most people maths is a real turn-off, yet maths is all about patterns and children of two or three love patterns. It just shows that schools are doing something seriously wrong.”
Wikipedia edit request Updated +Created
So, it turns out that Wikipedia does have a (ultra obscure as usual) mechanism for pull requests. You learn a new one every day.
Chemical process design software Updated +Created
Video 1.
Process Simulation Software FREE Download - Aspen Hysys versus DWSim | COCO by Jeferson Costa (2020)
Source. Jeferson, a Brazilian from Petrobras, is the creator of the open source DWSim software, and in this video he gives a quick demo of his software and compares it briefly to aspen HYSYS, which appears to be the golden paid reference implementation.
Chemiosmosis Updated +Created
How to cite a book on Wikipedia Updated +Created
A good big sample definition:
<ref name="googleStory">{{cite book |last1=Vise |first1=David |author-link1=David A. Vise |last2=Malseed |first2=Mark |author-link2=Mark Malseed |title=The Google Story |date=2008 |publisher=Delacorte Press |url=https://archive.org/details/isbn_9780385342728}}</ref>
There is also title-link to link to a wiki page. But it is incompatible with url= for Internet Archive Open Library links which is a shame.
Nested set model in SQL Updated +Created
How to implement Nested set model in SQL:
Network switch Updated +Created
A switch is a box with a bunch of Ethernet wires coming into it:
+--------------------+
| +-+  +-+  +-+  +-+ |
| |1|  |2|  |3|  |4| |
| +-+  +-+  +-+  +-+ |
+--------------------+
Except that it doesn't have to be Ethernet, e.g. it would also be a Wi-Fi.
What the switch does is:
  • an Ethernet request came in from wire 1
  • decide which wire to send it out on, e.g. wire 2, 3, 4, 5, etc. You likely don't want to send it back through 1 where it came from.
After the destination is found, a confirmation is somehow sent back to the switch, which then learns which wire to send each MAC address to.
A switch is a bit like a router but it is a bit dumber/operates at a lower level: it basically operates only on MAC addresses, not on IP addresses.
The Internet service provider boxes most people have at home combines a switch for the local network and a router for the ISP communication.
Next.js example Updated +Created
Our examples are located under nodejs/next:
Solved ones:
SQLite import CSV Updated +Created
Steven Pruitt Updated +Created
Video 1.
Meet the man behind a third of what's on Wikipedia
. Source.
Jimmy Wales Updated +Created
One thing to note is that Jimmy was a finance worker before starting wikipdia, e.g. he had capital to hire Larry Sanger.
Maybe that's the way to go about it, make money first, and later on change the world.
Starting just after the beginning of the Internet can't hurt either. Though tooling must have been insane back then.

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