Brain cell type Updated +Created
Gallium arsenide Updated +Created
This is apparently the most important III-V semiconductor, it seems to actually have some applications, see also: gallium arsenide vs silicon.
Georgism Updated +Created
Video 1.
Georgism 101 by BritMonkey (2019)
Source.
Inner product Updated +Created
Appears to be analogous to the dot product, but also defined for infinite dimensions.
Messier 49 Updated +Created
Organic bromide compound Updated +Created
Spacetime symmetry Updated +Created
University education level Updated +Created
IBM Personal Computer Updated +Created
Projective elliptic geometry Updated +Created
Each elliptic space can be modelled with a real projective space. The best thing is to just start thinking about the real projective plane.
Rap rock Updated +Created
System of linear equations Updated +Created
AsciiDoc Updated +Created
Calysta Updated +Created
Shabi Updated +Created
Simulation software Updated +Created
University of Sussex Updated +Created
Crystal detector Updated +Created
The first diodes. These were apparently incredibly unreliable, especially for portable radios, as you had to randomly search for the best contact point you could find in a random polycrystalline material!!
And also quality was highly dependant on where the material was sourced from as that affected the impurities present in the material. Later this was understood to be an issue of doping.
It was so unreliable that vacuum tube diodes overtook them in many applications, even though crystal detectors are actually semiconductor diodes, which eventually won over!
For a long time, before artificial semiconductors kicked in, people just didn't know the underlying physical working principle of these detectors. What I cannot create, I do not understand basically.
Eugenics Updated +Created

There are unlisted articles, also show them or only show them.