Roam

2026-01-27
Original implementation credits go to Hugo Cisneros

Here lie bottom-up (not top-down) notes.

German

Zettelkasten

Zettelkasten is a German word and it translates to “slip box”. It refers to a knowledge management and note-taking method popularised by Niklas Luhmann.

org-roam

page for the system that I use to index org files. it takes heavy inspiration from Roam Research.

org-mode

the omnipotent org-mode. see backlinks.

Keyboards

Here lies a page on Keyboards!

In my time tinkering I have had a number of keyboards.

This pages serves as an index for the boards that I have had, and includes information about their model numbers, switches, and shallow notes.

Actually scratch that, org-mode is powerful enough for me to make each board a level 1 heading as below and have it be indexed in my org-roam.

Chilkey ND75

Blue Lotus Switch.

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Remarkable Paper Pro

placeholder. might buy later.

spoiler alert – I bought it.

Build Process

How PDF highlights actually flow to the xochitl-baked copy: KOReader’s sdr is not ironed directly onto the PDF. The round-trip is:

  1. Highlight in KOReader on device → .sdr/metadata.pdf.lua.
  2. make remarkable-pull (or remarkable-sync/merge) reads the sdr, text-searches each highlight against the PDF via pymupdf, writes to sioyek

shared.db.

  1. make remarkable reads sioyek state and embed_pdf_annotations bakes the highlights into the PDF copy in xochitl.

Sioyek is a passthrough in the middle — not a second annotation surface you have to think about. The “iron-on” step at make remarkable time depends on sioyek holding the truth.

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Undergraduate Level Math

I’m just spit-balling here, but I think my library now covers all of Undergraduate level math.

Unfortunately, I am feeling the need to purchase the Remarkable Paper Pro as I don’t want to be forking out an additional $500 for 2-3 textbooks (on average) for each of my ~14 or so Graduate Math courses.

The way I see it, at the Undergraduate level you probably need textbooks on the following (in no particular order):

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Aristotle

sometimes this man said some weird things.

The Brain is Just a Radiator
Aristotle believed the heart was the center of intelligence and emotion, while the brain was merely a cooling mechanism (a “radiator”) designed to cool the blood.
Women are “Disfigured Men”
Aristotle was intensely sexist, even by ancient standards. He argued that women were “monstrous” or “disfigured” males (an occasional monstrous state) because he believed they were inferior in intelligence and physical capability.
Eels and Insects Spontaneously Generate from Mud
Because he couldn’t find gonads in eels, he concluded they did not reproduce but simply grew out of mud or “earthy guts” (spontaneous generation). He applied this theory to flies, lice, and fireflies too.
Men Have More Teeth Than Women
He claimed men have more teeth than women in humans, sheep, goats, and pigs. Although he was married twice, he never bothered to check by looking in his wives’ mouths.
Objects Stop Moving Because They Get “Tired”
Aristotle didn’t understand friction. He believed that moving objects only continued moving while they were being acted upon, and once they stopped, it was because they had run out of “force” and become tired.
Heavier Objects Fall Faster
He believed that the speed of a falling object was directly proportional to its weight, a mistake that went unquestioned for nearly 2,000 years.
Goats Breathe Through Their Ears
He claimed that goats breathe through their ears, which he believed was proven by the shape of their ears.
Mad Dog Bites Only Affect Animals, Not Humans
In his History of Animals, he suggested that a person bitten by a mad dog will not go mad, but any other animal will.
Children Should Be Conceived in a North Wind
He claimed that children would be healthier and better-looking if they were conceived when the wind was blowing from the north.
Bees Have Eight Legs
He incorrectly described the number of legs on a bee.