Messenger RNA Updated 2025-07-16
Reverse transcriptase Updated 2025-07-16
Converts RNA to DNA, i.e. the inverse of transcription. Found in viruses such as Retrovirus, which includes e.g. HIV.
Ridiculous cases of political correctness censorship Updated 2025-07-16
- Stack Exchange's censorship of "I think Trump is disgusting as a person" from Ciro Santilli's profile: cirosantilli.com/china-dictatorship/sstack-overflow-forbids-criticizing-the-character-of-genocidal-political-leaders-like-xi-jinping
Four-momentum Updated 2025-07-16
Fundamental theorem on homomorphisms Updated 2025-07-16
Pretty Much Physics Updated 2025-07-16
Square Updated 2025-07-16
Synchrotron Updated 2025-07-16
Most important application: produce X-rays for X-ray crystallography.
Note however that the big experiments at CERN, like the Large Hadron Collider, are also synchrotrons.
List of facilities: en.wikipedia.org/wiki/List_of_synchrotron_radiation_facilities
BitcoinStrings.com Updated 2025-07-16
bitcoinstrings.com has all
strings -n20 strings, we can obtain the whole thing and clean it up a bit with:wget -O all.html https://bitcoinstrings.com/all
cp all.html all-recode.html
recode html..ascii all-recode.html
awk '!seen[$0]++' all-recode.html > all-uniq.htmlawk to skip the gazillion "mined by message" repeats.A lot of in that website stuff appears to be cut up at the 20 mark. As shown in Force of Will, this is possibly because they didn't use
-w in strings -n20, and the text after the newlines was less than 20 characters.That website can be replicated by downloading the Bitcoin blockchain locally, then:
cd .bitcoin/blocks
for f in blk*.dat; do strings -n20 -w $f | awk '!seen[$0]++' > ${f%.dat}.txt; done
tail +n1 *.txtRemove most of the binary crap:
head -n-1 *.txt | grep -e '[. ]' | grep -iv 'mined by' | less Cartesian product Updated 2025-07-16
Galois theory Updated 2025-07-16
GenBank Updated 2025-07-16
Ciro's Edict #4 Updated 2025-07-16
Ciro's Edict #4 Enable reference features into ourbigbook.com Updated 2025-07-16
Cross polytope Updated 2025-07-16
Fan painting Updated 2025-07-16
Ciro's Edict #4 Group all SQL queries together Updated 2025-07-16
And do 5 big queries instead of hundreds of smaller ones.
For example, a README.ciro document that references another document saying:needs to fetch "speed-of-light" from the ID database (previously populated e.g. by preparsing light.ciro:to decide that it should display as "Speed of light" (the title rather than the ID).
The \x[speed-of-light] is fast.= Light
== Speed of lightPreviously, I was doing a separate fetch for each
\x[] as they were needed, leading to hundreds of them at different times.Now I refactored things so that I do very few database queries, but large ones that fetch everything during parsing. And then at render time they are all ready in cache.
This will be fundamental for the live preview on the browser, where the roundtrip to server would make it impossible
Black-body radiation experiment Updated 2025-07-16
- The Quantum Story by Jim Baggott (2011) page 10 mentions:and the footnote comments:
Early examples of such cavities included rather expensive closed cylinders made from porcelain and platinum.
- 1859-60 Gustav Kirchhoff demonstrated that the ratio of emitted to absorbed energy depends only on the frequency of the radiation and the temperature inside the cavity
- 1896 Wien approximation seems to explain existing curves well
- 1900 expriments by Otto Lummer and Ernst Pringsheim show Wien approximation is bad for lower frequencies
- 1900-10-07 Heinrich Rubens visits Planck in Planck's villa in the Berlin suburb of Grünewald and informs him about new experimental he and Ferdinand Kurlbaum obtained, still showing that Wien approximation is bad
- 1900 Planck's law matches Lummer and Pringsheim's experiments well. Planck forced to make the "desperate" postulate that energy is exchanged in quantized lumps. Not clear that light itself is quantized however, he thinks it might be something to do with allowed vibration modes of the atoms of the cavity rather.
- 1900 Rayleigh-Jeans law derived from classical first principles matches Planck's law for low frequencies, but diverges at higher frequencies.
Black-body Radiation Experiment by sciencesolution (2008)
Source. A modern version of the experiment with a PASCO scientific EX-9920 setup. RNA secondary structure Updated 2025-07-16
Analogous problem to the secondary structure of proteins. Likely a bit simpler due to the strong tendency for complementary pairs to bind.
Unit circle Updated 2025-07-16
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