x86 Paging Tutorial / The problem with single-level paging Updated +Created
The problem with a single-level paging scheme is that it would take up too much RAM: 4G / 4K = 1M entries per process.
If each entry is 4 bytes long, that would make 4M per process, which is too much even for a desktop computer: ps -A | wc -l says that I am running 244 processes right now, so that would take around 1GB of my RAM!
For this reason, x86 developers decided to use a multi-level scheme that reduces RAM usage.
The downside of this system is that is has a slightly higher access time, as we need to access RAM more times for each translation.
graphviz/hello.dot Updated +Created
Genetics company Updated +Created
Gravitational constant Updated +Created
Integer factorization Updated +Created
Complexity: NP-intermediate as of 2020:
The basis of RSA: RSA. But not proved NP-complete, which leads to:
Lesbian Updated +Created
Messier 87 Updated +Created
Minimal growth medium Updated +Created
Person educated at home Updated +Created
This construction takes as input:and it produces an elliptic curve over a finite field of order as output.
The constructions is used in the Birch and Swinnerton-Dyer conjecture.
To do it, we just convert the coefficients and from the Equation "Definition of the elliptic curves" from rational numbers to elements of the finite field.
For example, suppose we have and we are using .
For the denominator , we just use the multiplicative inverse, e.g. supposing we have
where because , related: math.stackexchange.com/questions/1204034/elliptic-curve-reduction-modulo-p
Relativistic quantum mechanics Updated +Created
The first really good quantum mechanics theory made compatible with special relativity was the Dirac equation.
TODO: does it use full blown QED, or just something intermediate?
Relativity Updated +Created
LinkedIn Updated +Created
LinkedIn fully complies with censorship imposed locally by the Chinese government, and does so in a non-transparent way: cirosantilli.com/china-dictatorship/linkedin.
It is hard to understand what the point of that website is, as it is basically just a more closed version of Facebook, but alas, it has flourished as the only place where people post more useful content compared to Twitter and Facebook. In any case, Ciro just applies the same unfollow policy to all of them: aggressively filter your social media follows.
Open problem in mathematics Updated +Created
Religion Updated +Created
His father always told him a story about how when Ciro was small, someone raised the question of the existence of God, to which Ciro replied very directly and naturally, without any doubts:
That doesn't exist.
It's a genetic thing it seems.
2D computer graphics Updated +Created
Vietnam Updated +Created
2D game Updated +Created

Unlisted articles are being shown, click here to show only listed articles.