Planck's law Updated 2025-07-16
Used to explain the black-body radiation experiment.
The Quantum Story by Jim Baggott (2011) page 9 mentions that Planck apparently immediately recognized that Planck constant was a new fundamental physical constant, and could have potential applications in the definition of the system of units (TODO where was that published):
Planck wrote that the constants offered: 'the possibility of establishing units of length, mass, time and temperature which are independent of specific bodies or materials and which necessarily maintain their meaning for all time and for all civilizations, even those which are extraterrestrial and nonhuman, constants which therefore can be called "fundamental physical units of measurement".'
This was a visionary insight, and was finally realized in the 2019 redefinition of the SI base units.
Video 1. Source. Contains a good explanation of how discretization + energy increases with frequency explains the black-body radiation experiment curve: you need more and more energy for small wavelengths, each time higher above the average energy available.
Black-body radiation experiment Updated 2025-07-16
Video 1.
Black-body Radiation Experiment by sciencesolution (2008)
Source. A modern version of the experiment with a PASCO scientific EX-9920 setup.
Base64 Updated 2025-07-16
yEnc Updated 2025-07-16
Big O notation Updated 2025-07-16
Module bound above, possibly multiplied by a constant:
is defined as:
E.g.:
  • . For , is enough. Otherwise, any will do, the bottom line will always catch up to the top one eventually.
Little-o notation Updated 2025-07-16
Stronger version of the big O notation, basically means that ratio goes to zero. In big O notation, the ratio does not need to go to zero.
So in informal terms, big O notation means , and little-o notation means .
E.g.:
  • K does not tend to zero
Positive-strand RNA virus Updated 2025-07-16
It just has RNA that can be transcribed directly by the host ribosome.
ASM International Updated 2025-07-16
Parent/predecessor of ASML.
Allen Wu Updated 2025-07-16
This situation is the most bizarre thing ever. The dude was fired in 2020, but he refused to be fired, and because he has the company seal, they can't fire him. He is still going to the office as of 2022. It makes one wonder what are the true political causes for this situation. A big warning sign to all companies tring to setup joint ventures in China!
Video 1.
ARM Fired ARM China’s CEO But He Won’t Go by Asianometry (2021)
Source.
Arm product Updated 2025-07-16

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