Ciro Santilli @cirosantilli 40

Official support is abysmal, very focused on MicroPython and their graphical UI.

The setup impossible to achieve as it requires setting up the Yotta, just like the impossible to setup Compile MicroPython code for Micro Bit locally on Ubuntu 22.04 with your own firmware setup.

So we just use github.com/lancaster-university/microbit-samples + github.com/carlosperate/docker-microbit-toolchain:

docker pull ghcr.io/carlosperate/microbit-toolchain:latest
git clone https://github.com/lancaster-university/microbit-samples
cd microbit-samples
git checkout 285f9acfb54fce2381339164b6fe5c1a7ebd39d5

# Select a sample, builds one at a time. The default one is the hello world.
cp source/examples/hello-world/* source

# Build and flash.
docker run -v $(pwd):/home --rm ghcr.io/carlosperate/microbit-toolchain:latest yotta build
cp build/bbc-microbit-classic-gcc/source/microbit-samples-combined.hex "/media/$USER/MICROBIT/"

.hex file size for the hello world was 447 kB, much better than the MicroPython hello world downloaded from the website which was about 1.8 MB!

If you try it again for a second time from a clean tree, it fails with:

warning: github rate limit for anonymous requests exceeded: you must log in

presumably because after Yotta died it started using GitHub as a registry... sad. When will people learn. Apparently we were at 5000 API calls per hour. But if you don't clean the tree, you will be just fine.

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Program Raspberry Pi Pico W with MicroPython Updated 2025-07-26

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Install firmware: projects.raspberrypi.org/en/projects/getting-started-with-the-pico/3

Then there are two appraoches:

thonny if you like clicking mouse buttons:
```
pipx install thonny
```
and select the interpreter as the Pico.
ampy if you like things to just run from the CLI: How to run a MicroPython script from a file on the Raspberry Pi Pico W from the command line?

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Processor (computing) Updated 2025-07-16

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Probably quantum secure encryption algorithm Updated 2025-07-16

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Probable observation of the Josephson superconducting tunneling effect Updated 2025-07-16

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Paper by Philip W. Anderson and John M. Rowell that first (?) experimentally observed the Josephson effect.

Paywalled by the American Physical Society as of 2023 at: journals.aps.org/prl/abstract/10.1103/PhysRevLett.10.230

DOI: doi.org/10.1103/PhysRevLett.10.230

TODO understand the graphs in detail.

They used tin-oxide-lead tunnel at 1.5 K. TODO oxide of what? Why two different metals? They say that both films are 200 nm thick, so maybe it is:

   -----+------+------+-----
...  Sn | SnO2 | PbO2 | Pb  ...
   -----+------+------------
          100nm 100nm

A reconstruction of their circuit in Ciro's ASCII art circuit diagram notation TODO:

DC---R_10---X---G

There are not details of the physical construction of course. Reproducibility lol.

Figure 1.
Figure 1 of Probable observation of the Josephson superconducting tunneling effect
. TODO what do the dotted lines mean?

Figure 2.
Figure 2 of Probable observation of the Josephson superconducting tunneling effect
.

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Prize Updated 2025-07-16

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Generally, prizes that pay big lumps of money to well established individuals are a bit useless, it would be better to pay smaller sums to struggling beginners in the field, of which there are aplenty.

The most important part about prizes should not be the money, nor the recognition, but rather explaining better what the laureates did. In this, most prizes fail. Thus Ciro Santilli's project idea: Project to explain each Nobel Prize better.

Ah, this list: en.wikipedia.org/wiki/List_of_prizes_known_as_the_Nobel_or_the_highest_honors_of_a_field

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Prisoner's dilemma Updated 2025-07-16

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en.wikipedia.org/wiki/Prisoner%27s_dilemma

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Primitive recursive function Updated 2025-07-16

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In intuitive terms it consists of all integer functions, possibly with multiple input arguments, that can be written only with a sequence of:

variable assignments
addition and subtraction
integer comparisons and if/else
for loops

for (i = 0; i < n; i++)

and such that n does not change inside the loop body, i.e. no while loops with arbitrary conditions.

n does not have to be a constant, it may come from previous calculations. But it must not change inside the loop body.

Primitive recursive functions basically include every integer function that comes up in practice. Primitive recursive functions can have huge complexity, and it strictly contains EXPTIME. As such, they mostly only come up in foundation of mathematics contexts.

The cool thing about primitive recursive functions is that the number of iterations is always bound, so we are certain that they terminate and are therefore computable.

This also means that there are necessarily functions which are not primitive recursive, as we know that there must exist uncomputable functions, e.g. the busy beaver function.

Adding unbounded while loops of course enables us to simulate arbitrary Turing machines, and therefore increases the complexity class.

More finely, there are non-primitive total recursive functions, e.g. most famously the Ackermann function.

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Pragmatism Updated 2025-07-16

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The opposite of idealism.

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Powder vs single crystal X-ray crystallography Updated 2025-07-16

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Post-quantum cryptography company Updated 2025-07-16

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PostgreSQL spatial index Updated 2025-07-16

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Postgraduate education Updated 2025-07-16

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Position representation Updated 2025-07-16

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A way to write the wavefunction

ψ (x)

such that the position operator is:

x

(1)

i.e., a function that takes the wavefunction as input, and outputs another function:

x ψ (x)

(2)

If you believe that mathematicians took care of continuous spectrum for us and that everything just works, the most concrete and direct thing that this representation tells us is that:

the probability of finding a particle between $x_{0}$ and $x_{1}$ at time $t$

equals:

\int_{x_{0}}^{x_{1}} x ψ x, t d x

(3)

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Position and momentum space Updated 2025-07-16

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One of the main reasons why physicists are obsessed by this topic is that position and momentum are mapped to the phase space coordinates of Hamiltonian mechanics, which appear in the matrix mechanics formulation of quantum mechanics, which offers insight into the theory, particularly when generalizing to relativistic quantum mechanics.

One way to think is: what is the definition of space space? It is a way to write the wave function

ψ_{x} (x)

such that:

the position operator is the multiplication by $x$
the momentum operator is the derivative by $x$

And then, what is the definition of momentum space? It is of course a way to write the wave function

ψ_{p} (p)

such that:

the momentum operator is the multiplication by $p$

physics.stackexchange.com/questions/39442/intuitive-explanation-of-why-momentum-is-the-fourier-transform-variable-of-posit/39508#39508 gives the best idea intuitive idea: the Fourier transform writes a function as a (continuous) sum of plane waves, and each plane wave has a fixed momentum.

Bibliography:

en.wikipedia.org/wiki/Position_and_momentum_space

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Porn vlog Updated 2025-12-13

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This is a porn style defined by Ciro Santilli as:

content is designed and owned by the actors
full face reveal
doing normal vlog things like talking, visiting places, eating, etc., not just fucking

Ciro believes that this is an interesting type of pornography, as it feels more natural and humane than all the horrible trash that comes out of horrendous professional mainstream porn industry.

Yes, it could go down the YouTube/Instagram alley, and lead the vloggers to do things they wouldn't normally do because of the audience. But who is to say that Ciro Santilli doesn't do the same on Stack Overflow to some extent?

That type of porn requires some big courage to make. Or balls if you will. Kudos to those creators, as it is so taboo it could greatly impact their future job prospects.

The travel sex vlog appears to be the most popular way to do it. Presumably the reason being that you would not be able to interact with people in a normal job, so to keep things interesting you need to go to some random places.

Examples: