Ciro Santilli @cirosantilli 37 

stats.stackexchange.com/questions/19048/what-is-the-difference-between-test-set-and-validation-set

Super Mario game by

Ciro Santilli 37 Updated 2025-07-16

Steve Wozniak by

Ciro Santilli 37 Updated 2025-07-16

Star Trek: The Next Generation by

Ciro Santilli 37 Updated 2025-07-16

Ciro Santilli likes this.

He doesn't have the patience to actually watch full episodes with rare exceptions, rather just watching selected scenes from: www.youtube.com/channel/UCdeIGY2DIjpGf0A2m9GSE3g, but still, it is interesting.

What appeals to Ciro in this series is how almost nothing is solved by violence, almost everything is decided in the bridge, at the "cerebral" level of the command structure. This reminds Ciro of a courtroom of law sometimes.

Maybe there's also a bit of 90's nostalgia involved too though, as this is something that would show on some random cable channels a bored young Ciro would have browsed during weekends, never really watching full episodes.

One crime of many episodes is being completely based on some stupid new scientific concept, which any character to back it up.

Another thing that hurt is that due to their obsession with the senior members of the crew, sometimes those senior members are sent in ridiculously risky operations, which is very unrealistic.

Episodes that Ciro watched fully and didn't regret:

s02e09 Measure of a man en.wikipedia.org/wiki/The_Measure_of_a_Man_(Star_Trek:_The_Next_Generation) see also physics and the illusion of life
s04e14 Clues en.wikipedia.org/wiki/Clues_(Star_Trek:_The_Next_Generation)
s04e15 First contact en.wikipedia.org/wiki/First_Contact_(Star_Trek:_The_Next_Generation). Although the premise that the aliens look so much like humans, and worse, that Decker could speak their language to the point of passing as one of their race is preposterous, the idea of inversion of first contact is just too cute.
s07e15 The Lower Decks en.wikipedia.org/wiki/Lower_Decks_(Star_Trek:_The_Next_Generation), sliding scale of idealism vs. cynicism near cynincism, yes please

Semi worth it:

s03e11 The Hunted memory-alpha.fandom.com/wiki/The_Hunted_(episode) if it weren't for the ending, maybe this would have been decent

Not worth it:

Cause and effect

TODO

s06e11 Chain of command

Monster group by

Ciro Santilli 37 Updated 2025-07-16

Group theory, abstraction, and the 196,883-dimensional monster by 3Blue1Brown (2020)

Source. Too basic, starts motivating groups themselves, therefore does not give anything new or rare.

Aberration (astronomy) by

Ciro Santilli 37 Updated 2025-07-16

Lie algebra of

SO (3)

Ciro Santilli 37 Updated 2025-07-16

We can reach it by taking the rotations in three directions, e.g. a rotation around the z axis:

R_{z} (θ) = cos (θ) s in (θ) 0 - s in (θ) cos (θ) 0 001

(1)

then we derive and evaluate at 0:

L_{z} = \frac{d R _{z} ( θ )}{d θ}_{0} = - s in (θ) cos (θ) 0 - cos (θ) - s in (θ) 0 001_{0} = 010 - 1 00 000

(2)

L_{z}

therefore represents the infinitesimal rotation.

Note that the exponential map reverses this and gives a finite rotation around the Z axis back from the infinitesimal generator

L_{z}

e^{θ L_{z}} = R_{z} (θ)

(3)

Repeating the same process for the other directions gives:

L_{x} = TO D O L_{y} = TO D O

(4)

We have now found 3 linearly independent elements of the Lie algebra, and since

SO (3)

has dimension 3, we are done.

Spacetime diagram by

Ciro Santilli 37 Updated 2025-07-16

Why should I care when I can calculate new x and new time with Lorentz transformation?

Answer: it can give some qualitative intuition on what is larger/smaller happens before/after based only on arguably more intuitive geometric considerations, without requiring you to do any calculations, see e.g. Figure "Spacetime diagram illustrating how faster-than-light travel implies time travel".

Continuous integration by

Ciro Santilli 37 Updated 2025-07-16

Software engineer stereotype by

Ciro Santilli 37 Updated 2025-07-16

Software development principle by

Ciro Santilli 37 Updated 2025-07-16

Blade server by

Ciro Santilli 37 Updated 2025-07-16

HP Blade Server by Brian Kirsch (2013)

Source.

Featuring an HP DL380 blade server, presumably an older model of this series: buy.hpe.com/uk/en/servers/proliant-dl-servers/proliant-dl300-servers/proliant-dl380-server/hpe-proliant-dl380-gen10-server/p/1010026818.

In the video we can see that it contains RAM, disk storage, we are told about two CPUs, and networking interfaces, so it is a complete computer on its own. He also explains that unlike typical rack servers, each blade unit does not have its own coolers and power supply related hardware, which goes instead on the chassis.

IMEC by

Ciro Santilli 37 Updated 2025-07-16

imec: The Semiconductor Watering Hole by Asianometry (2022)

Source. A key thing they do is have a small prototype fab that brings in-development equipment from different vendors together to make sure the are working well together. Cool.

ASML Holding by

Ciro Santilli 37 Updated 2025-07-16

As of 2020 leading makers of the most important fab photolithography equipment.