Compiled programming language Updated +Created
Dan Kaminsky approves Linux Kernel Module Cheat Updated +Created
E. Coli origin of replication Updated +Created
Economist Updated +Created
ELF Hello World Tutorial Updated +Created
Introductory analysis of a simple example of the executable and Linkable Format.
Financial crisis Updated +Created
Folding@home Updated +Created
Gamma matrices Updated +Created
Interpreted programming language Updated +Created
Interestingly, the very first programming language with an actual implementation was interpreted: Short Code in 1950.
This is not surprising, as interpreters are easier to write than compilers.
And just like modern scripting languages, it reduced execution speed by about 50x.
Jorge Paulo Lemann Updated +Created
Linked list Updated +Created
Logarithm Updated +Created
SETI@home Updated +Created
Rooting for sport teams is stupid Updated +Created
Since Ciro Santilli is Brazilian, this is understandably a common conversation opener.
And rightly so, since soccer in particular is truly ridiculously popular in Brazil, where "what is your local soccer team?" is just as valid a conversation starter as "Which city are you from?".
So here goes Ciro's 2020 cynic answer:
I currently root actively against Brazil.
The ironic reason is simple: maybe is Brazil loses more on this useless art, then maybe people will get tired of it, and instead invest on more useful and beautiful arts.
Notably, what Ciro really wants people to root for are:
Don't get Ciro wrong.
Observing professionals who do it amazingly can be beautiful.
But why the F do you have to root for a team unless your wife or children are playing in it (and even then..., how will that help?)?
What will you get from that?
Even if it is your national team, why does it matter if they win or lose?
Hooliganism just takes that uselessness to a hole new level.
Now some confessions.
A five year old Ciro will never forget when the feeling of Brazil won the 1994 World Cup on the penalties and everyone went mad that evening.
A nine year old Ciro stopped watching the 1998 World Cup Final of Brazil vs France half way during the 3-0 massacre and went to his front garden to kick his soccer ball on the metallic fence gate which represented a goal.
After that, Ciro went through puberty he guesses, and noticed that the natural sciences are just cooler than this soccer watching bullshit.
Video 1.
Football, Football, Football by Mitchell and Webb
. Source.
Video 3.
Rooting for sports is for suckers by Lit Nomad
. Source.
Radiation pressure Updated +Created
Tensor product in quantum computing Updated +Created
We don't need to understand a super generalized version of tensor products to know what they mean in basic quantum computing!
Intuitively, taking a tensor product of two qubits simply means putting them together on the same quantum system/computer.
When we write the bra-ket notation: that is the same as .
The tensor product is called a "product" because it distributes over addition.
E.g. consider:
Intuitively, in this operation we just put a Hadamard gate qubit together with a second pure qubit.
And the outcome still has the second qubit as always 0, because we haven't made them interact.
The quantum state is called a separable state, because it can be written as a single product of two different qubits. We have simply brought two qubits together, without making them interact.
If we then add a CNOT gate to make a Bell state:
we can now see that the Bell state is non-separable: we've made the two qubits interact, and there is no way to write this state with a single tensor product. The qubits are fundamentally entangled.
The artist and the politician Updated +Created
Once upon a time in the 2010's, Ciro Santilli went to an artsy theatre venue in the suburbia of Paris, dragged by his wife then girlfriend of course.
In the venue, there was a politician, who was doing his best to show how much they supported the arts, and there were of course the artists, involved in the play.
The politician would see a political power score on top of every person's head, and would spend an amount of time talking to each person exactly proportional to that score. This meant basically one sentence to us. The words themselves didn't really matter of course, only the time spent, they just have to produce nice sounds.
One of the artists however, and he seemed quite important in the production, for some reason spent a huge amount of time speaking to us. The score the artist saw on our heads was of love, or how interested we were in the art.
Theories of Quantum Matter by Austen Lamacraft Updated +Created
As mentioned on the introduction, the main objective of the course is to try predict qualitative properties of materials, notably the existence of certain phase transitions, starting from first principle toy models.
There is value in tutorials written by early pioneers of the field Updated +Created
Everyone is beginner when the field is new, and there is value in tutorials written by beginners.
For example, Ciro Santilli felt it shocking how direct and satisfying Richard Feynman's scientific vulgarization of quantum electrodynamics were, e.g. at: Richard Feynman Quantum Electrodynamics Lecture at University of Auckland (1979), and that if he had just assumed minimal knowledge of mathematics, he was about to give a full satisfactory picture in just a few hours.
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