Ciro Santilli @cirosantilli 37

Related: Dirac equation vs quantum electrodynamics.

See: math.stackexchange.com/questions/579453/real-world-application-of-fourier-series/3729366#3729366 from heat equation solution with Fourier series.

Separation of variables of certain equations like the heat equation and wave equation are solved immediately by calculating the Fourier series of initial conditions!

Other basis besides the Fourier series show up for other equations, e.g.:

TEM: sample has to be very thin, you get a 2D image. Higher resolution possible.

SEM: sample does not need to be ultra thin, you get a 3D image. Lower resolution possible.

Maybe those are genial. Maybe not. Nostalgia is just too strong to discern. Ciro still goes back to them for rest.

Like cysteine, but with selenium instead of sulfur.

The weird one, not directly coded in the genetic code.

Receptor in SARS-CoV-2 cell entry.

2022-02: Kiea Barlast floor lamp: www.ikea.com/gb/en/p/barlast-floor-lamp-black-white-50437810 Bulb: LED bulb E27 globe opal white.

Table: web.archive.org/web/20210718034540/https://www.westelm.com/weimgs/rk/images/i/201644/0004/images/pdf/assembly-instructions/english/mid_century_expandable_dining_table_medium_large.pdf