Snowden (film) Updated 2025-07-26
Video 1.
Aptitude test scene from the Snowden 2016 film
. Source.
Video 2.
FISA Court Order The Guardian discussion scene from the Snowden 2016 film
. Source.
Video 3.
How is this Possible? scene from the Snowden 2016 film
. Source.
Video 4.
Fresh Brains for You scene from the Snowden 2016 film
. Source.
Salted bomb Updated 2025-07-16
Turbo code Updated 2025-07-16
TODO how close does it get to Shannon's limit?
Multicellularity is polyphyletic Updated 2025-07-16
From Wikipedia:
Multicellularity has evolved independently at least 25 times in eukaryotes
and:
Complex multicellular organisms evolved only in six eukaryotic groups: animals, symbiomycotan fungi, brown algae, red algae, green algae, and land plants.
Nuclear site Updated 2025-07-16
Physical layer Updated 2025-07-16
This one is not generally seen by software, which mostly operates starting from OSI layer 2.
Schrödinger equation Updated 2025-07-16
Experiments explained:
To get some intuition on the equation on the consequences of the equation, have a look at:
The easiest to understand case of the equation which you must have in mind initially that of the Schrödinger equation for a free one dimensional particle.
Then, with that in mind, the general form of the Schrödinger equation is:
Equation 1.
Schrodinger equation
.
where:
The argument of could be anything, e.g.:
Note however that there is always a single magical time variable. This is needed in particular because there is a time partial derivative in the equation, so there must be a corresponding time variable in the function. This makes the equation explicitly non-relativistic.
The general Schrödinger equation can be broken up into a trivial time-dependent and a time-independent Schrödinger equation by separation of variables. So in practice, all we need to solve is the slightly simpler time-independent Schrödinger equation, and the full equation comes out as a result.
Simian Updated 2025-07-16

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