Spacetime interval by Ciro Santilli 37 Updated 2025-07-16
In the Galilean transformation, there are two separate invariants that two inertial frame of reference always agree on between two separate events:
However, in special relativity, neither of those are invariant separately, since space and time are mixed up together.
Instead, there is a new unified invariant: the spacetime-interval, given by:
Note that this distance can be zero for two events separated.
Fluorometer by Ciro Santilli 37 Updated 2025-07-16
Video 1.
Time-Correlated Single Photon Counting (TCSPC) with the Fluorolog Fluorimeter by Yale CBIC (2011)
Source.
Ethernet cable by Ciro Santilli 37 Updated 2025-07-16
When non-specialists say "Ethernet cable", they usually mean twisted pair for Ethernet over twisted pair.
But of course, this term is much more generic to a more specialized person, since notably fiber optics are also extensively used in Ethernet over fiber.
QEMU by Ciro Santilli 37 Updated 2025-07-16
The leading open source cross architecture and KVM emulator of the 2010's.
Great way to understand how operating systems work, which Ciro Santilli used extensively in his Linux Kernel Module Cheat.
This is hot shit, a possible worst case but sure to get there scenario to understand the brain!

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