Get Bitcoin transaction id from position in dat file Updated +Created
Suppose we specify:
  • a .dat file
  • the offset in bytes within that file
The question then is, which transaction is encoded at that position of the file?
This would allow us to index inscriptions in the .dat files directly with fast C tools, and then retrive the transaction ID to get cleaner data and metadata.
It should be possible if we managed to take the information from bitcoindev.network/understanding-the-data/ and dump into an indexed SQLite database.
I tried to start things off with LevelDBDumper:
LevelDBDumper -d ~/snap/bitcoin-core/common/.bitcoin/indexes/txindex -f btc.csv -q -o . -t csv
but that consumed all 64 GB of RAM on P51... github.com/mdawsonuk/LevelDBDumper/issues/15
But OK, nevermind that repo, it can be done easily with the LevelDB API of any language: bitcoin.stackexchange.com/questions/121888/what-is-the-data-format-layout-for-txindex-leveldb-values. Just the data seems wrong and we don't know why.
Kaon Updated +Created
One strange quark bound with one up quark or a down quark. 6 combinations exist, 4 if we consider antiparticles the same as particles.
Micrometer Updated +Created
Renormalization Updated +Created
Video 1.
The Biggest Ideas in the Universe | 11. Renormalization by Sean Carroll (2020)
Source. Gives a very quick and high level overview of renormalization. It is not enough to satisfy Ciro Santilli as usual for other Sean Carroll videos, but it goes some way.
Alternative splicing Updated +Created
Angstrom Updated +Created
Design pattern Updated +Created
Josephson voltage standard Updated +Created
The most practical/precise volt standard.
The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
Figure 1.
Schematic of a typical Josephson voltage standard chip
. Source.
Figure 2.
Sam Benz demonstrating the equipment required the voltage standard
. Source.
Video 1.
The evolution of voltage metrology to the latest generation of JVSs by Alain Rüfenacht
. Source. Talk given in 2023. The speaker is from NIST, and the talk was hosted by the BIPM. Fantastic talk.
Video 2.
Technical aspects of realizing the DC volt in the laboratory with a JVS by Stéphane Solve
. Source. Talk given in 2023. The speaker is from BIPM, and the talk was hosted by the BIPM. Fantastic talk.
Radioactive decay Updated +Created
Ciro Santilli finds it interesting that radioactive decay basically kickstarted the domain of nuclear physics by essentially providing a natural particle accelerator from a chunk of radioactive element.
The discovery process was particularly interesting, including Henri Becquerel's luck while observing phosphorescence, and Marie Curie's observation that the uranium ore were more radioactive than pure uranium, and must therefore contain other even more radioactive substances, which lead to the discovery of polonium (half-life 138 days) and radium (half-life 1600 years).
Radio receiver Updated +Created
As well put by Wikipedia, a radio receiver has to perform three functions on the signal from the antenna:
Richard Bates (Silk Road advisor and Ross' friend) Updated +Created
youtu.be/HBTYVVUBAGs?t=178 claims to contain a photo of him without source. He has no easy to find online profiles.
Variety Jones: IRL, is there anyone with a clue at all? A girlfriend, boyfriend, buddy you talk to, etc?
myself: Unfortunately yes, there are two but they think I sold the site and got out, and they're quite convinced of it.
His email was published: baronsyntax@gmail.com. They actaully talked on Google Chat. OMG.
Rich people who create charitable prizes are often crooked Updated +Created
A friend of mine who's a rich man - he invented some kind of simple digital switch - tells me about these people who contribute money to make prizes or give lectures: "You always look at them carefully to find out what crookery they're trying to absolve their conscience of."
But do you know what, Cirism is totally fine with taking indulgences to absolve someone from their past sins, so long as they have repented. Everyone deserves a second chance.
Positive-strand RNA virus Updated +Created
It just has RNA that can be transcribed directly by the host ribosome.
randyscotsmithey/feathers-realworld-example-app Updated +Created
MongoDB-based.
So once you install MongoDB, run with:
MONGODB_FEATHERS_REALWORLD=mongodb://localhost:27017/mydb npm start
Tests can be run with:
MONGODB_FEATHERS_REALWORLD=mongodb://localhost:27017/mydb npm run test
but there were 10 failures and 55 passes: github.com/randyscotsmithey/feathers-realworld-example-app/issues/3
Anglo-Saxons Updated +Created
Animal Updated +Created
Audacity profile-based background noise removal Updated +Created
List of quotes Updated +Created
Recreational mathematics Updated +Created

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