Computer data storage hardware Updated 2025-07-16
Computer Science and Philosophy course of the University of Oxford Updated 2025-07-16
Public landing page: www.ox.ac.uk/admissions/undergraduate/courses/course-listing/computer-science-and-philosophy
A mixed cross department course with the philosophy department. Its corresponding masters is known as Oxford MCompSciPhil. The handbook is together with the computer science one: Section "Computer science course of the University of Oxford".
Computer science and philosophy masters course of the University of Oxford Updated 2025-07-16
Public landing page: www.ox.ac.uk/admissions/undergraduate/courses/course-listing/computer-science-and-philosophy
Corresponding undergrad: Computer Science and Philosophy course of the University of Oxford.
Charles K. Kao Updated 2025-07-16
Miner message Updated 2025-07-16
This is opposed to messages that may be left by non miners during transactions.
Miner messages are therefore of course much harder to control on established blockchains, as they basically require consensus in a mining pool to set. Most of them are just ads for the mining pool itself.
Carl Mark Force Updated 2025-07-16
Full name Carl Mark Force IV, the fourth! As mentioned at www.vice.com/en/article/vv7dgj/great-moments-in-shaun-bridges-a-corrupt-silk-road-investigator (this made Ciro Santilli laugh quite hard:
Carl Mark Force IV - the other corrupt cop charged alongside Bridges - is pretty hard to beat, just name-wise.
Cool data embedded in the Bitcoin blockchain China Updated 2025-07-16
China stuff is mentioned at: cirosantilli.com/china-dictatorship/bitcoin-blockchain.
Cool data embedded in the Bitcoin blockchain IRC log dumps Updated 2025-07-16
tx 210000d1392bec2505d1289e5c39c2039204ff1ecf7eef55f973ccd3111003e1, block 360235 (2015-06-10) and the following transactions have transcripts of a very long developer chat starting with:
TODO purpose? The transcripts are interspersed with developers likely voting for project leadership, and commenting on Gavin.
TODO find original discussion location, these are almost certainly from one of the Bitcoin IRC channels.
Part of the goal of this dump is that the Bitcoin developers have a policy of not allowing logging on their talk channel, and this released it all to the blockchain forever where it cannot be deleted. These might just be more of protests against larger block sizes.
BSHUNTER: Detecting and Tracing Defects of Bitcoin Scripts Updated 2025-07-16
Cool data embedded in the Bitcoin blockchain Software Updated 2025-07-16
GitHub is for newbs.
- 50002f38a40aeca96f7d03ceac1c62fc233b44207af99df8f1daddf03f6ef61c via cryptograffiti.info contains a Python script that starts with:
#!/usr/bin/env python3 # # This file is placed in the public domain. # # CryptoGraffiti tool # # Requires python-bitcoinlib-v0.2.1 # # https://github.com/petertodd/python-bitcoinlib # # pip install python-bitcoinlib - 209c9106c7261582f5d0907819c6e10dea670c273133047d911be41f8a42d86f via cryptograffiti.info contains a Base64 encoded Python script starting in:Some related ones:
#!/usr/bin/env python # brainwallet "base58" # v2015-05-18, fixed Tor DNS problem import binascii import hashlib- 25658f625c8f3964593b9e3c632040cb69aea9cf24403af33ab173d7cba7c42f
- 7d188bd499137b5a0d68271ef8a4f3c4dc2f2b38bd03dfc913cb2b0be15b1e0d
Cool data embedded in the Bitcoin blockchain Technically interesting ordinal Updated 2025-07-16
This section is about ordinals that are interesting primarily due to technical reasons linked to edge cases of the protocol.
Interesting MIME types:
- ordinals.com/inscription/dad86d722156b8c384c1f3243e40aa7a0f6f5be496bc24e19485831584f9803fi0: mime type is an UTF-8 orange emoji "🟠"
- ordinals.com/inscription/bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22i0: mime type is an XSS attempt:
<script>alert('xss in content type')</script> tx=bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22 - ordinals.com/inscription/bc7b86245159cdf8bc63489687909f766a0a0e08279d23fb077cdd60ab1e9f22i0: mime type is "FuckYou"
- ordinals.com/inscription/00b0ece72217ce49b637b3f9bf5335bc245e588568aa0676581b40c1bedc521di0: the mime is a long JSON. However, it does appear to be a valid feature as it rendered specially on ordinals.com.
Different
ord markers:- 71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5 uses
takingnames. Decode with:gives the PNG of the wireframe draing of a washing machine with transparent background.bitcoin-core.cli decodescript "$(bitcoin-core.cli getrawtransaction 71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5 true | jq -r '.vin[0].txinwitness[1]')" | jq -r .asm | sed 's/.* 0 //;s/ OP_ENDIF//;s/ //g' | xxd -r -p > 71e85885522047240a9e70542145dbf2385e1bd468e6ac6002aa755422ea10f5.png
Cool data embedded in the Bitcoin blockchain Trump Updated 2025-07-16
There's a bit of both sides in the 2016 race:
- tx 3aaae4adc68b3768e1a6029987f2aca2479818495c9aee6a86067710806e9c4f: "bEW Trump 2016! Stop the TPP!"
- tx 202ceac7b3e7b990d1961fd2eab18ba5c80c99f10eacc783f14c53ebfdcaee00 "oEW Fuck Obama&Clinton Go Trump!!!!"
- tx 53fcddaa69e79c0fdc4e2cd139bffef341a38d46bb653721d9adf42460b1afae "EW Trump will fail America, like all his businesses"
- data/out/0433.txt:1752:EW FUCK Trump and his supporters. You ppl are the dumbest scum ever.
- data/out/0435.txt:1904:EW TRUMP 2016 !!!!!!!!!!!!!!
- data/out/0437.txt:1150:bjEW FuCk OfF TrUmP!
- data/out/0439.txt:1017:EW trump will trample regulations justly
- data/out/0443.txt:1281:L9,GOD EMPEROR TRUMP WINS THIRD TERM`7
- data/out/0444.txt:2102:L99,TRUMPPPPPPPPPPPPPPP
- data/out/0445.txt:311:L127,TRUMP WILL SAVE THE WORLD.
- data/out/0445.txt:1257:EW Howard not Trump is the actual 45th president.
- tx 2fb07a8f358d690d8717734a48e5daf0ef70ea2d0e3b7c88dace8a5818fcb168 "L299,Trump touched my no-no"
- data/out/0457.txt:8677:EW All of the sheep think Donald Trump is literally Hitler.
- data/out/0481.txt:11481:I kill donald trump!!!!!!
- data/out/0545.txt:1239:}fEW fuck donald trump
- tx 05fce37228c732f4635f79e6f36d028be677404beab497ddace9024fe8e4b517 "EW Heil Trump!He's the true white leader our race need so much since Adolf"
- data/out/0552.txt:14:Trump needs to get impeached and locked up!
- data/out/0666.txt:56:(Trump was impeached for the second time in office.
Block reward Updated 2025-07-16
Blockchain explorer Updated 2025-07-16
Create gradient image with ImageMagick Updated 2025-07-16
convert -size 256x256 gradient: out.png
convert -size 256x256 gradient:white-black out.png
convert -size 256x256 gradient:red-blue out.png
convert -size 256x256 radial-gradient: out.png
convert -size 256x256 radial-gradient:white-black out.png Creator of Archive.today Updated 2025-07-16
- drive.google.com/file/d/1JTPVd09NPaGH-KzGv2jU3XXcFiJAoUjw/view some crazy due investigating, let's see how long until it goes down, posted at: Points to:"Alex Conferno" is also brought up: twitter.com/conferno
- www.reddit.com/r/DataHoarder/comments/12trawt/has_anyone_ever_actually_spoken_to_denis_petrov/
- gyrovague.com/2023/08/05/archive-today-on-the-trail-of-the-mysterious-guerrilla-archivist-of-the-internet/. Trended on Hacker News: news.ycombinator.com/item?id=37009598
- gigazine.net/gsc_news/en/20240326-archive-today/
Other mentions of "Denis Petrov":
Crystal detector Updated 2025-07-16
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.
MuJoCo getting started Updated 2025-07-16
Tested on Ubuntu 23.10;
git clone https://github.com/google-deepmind/mujoco
cd mujoco
git checkout 5d46c39529819d1b31249e249ca399f306a108ac
mkdir -p build
cd build
cmake ..
make -jNow let's play. Minimal interactive UI simulation of a simple MJCF scene with one falling cube:Test soure code: github.com/google-deepmind/mujoco/blob/5d46c39529819d1b31249e249ca399f306a108ac/sample/basic.cc. The only thing you can do is rotate the scene with the computer mouse it seems. Mentioned at: mujoco.readthedocs.io/en/2.2.2/programming.html#sabasic
bin/basic ../doc/_static/hello.xmlSome more interesting models can be found under the
model/ directory: github.com/google-deepmind/mujoco/tree/5d46c39529819d1b31249e249ca399f306a108ac/model E.g. the imaginary humanoid robot DeepMind used in many demos can be seen with:bin/basic ../model/humanoid/humanoid.xmlA more advanced UI with a few controls:Test soure code: github.com/google-deepmind/mujoco/tree/5d46c39529819d1b31249e249ca399f306a108ac/simulate. Mentioned at: mujoco.readthedocs.io/en/2.2.2/programming.html#sasimulate
bin/simulate ../doc/_static/hello.xmlA very cool thing about that UI is that you can manually control joints. There are no joints in the hello.xml, but e.g. with the humanoid model:under "Control" you move each joint of the robot separately which is quite cool.
bin/simulate ../model/humanoid/humanoid.xmlThere's also a Mentioned at: mujoco.readthedocs.io/en/2.2.2/programming.html#sarecord but TODO that produced a broken video, related issues:
bin/record test executable that presumably renders the simulation directly to a file:bin/record ../doc/_static/hello.xml 5 60 rgb.out
ffmpeg -f rawvideo -pixel_format rgb24 -video_size 800x800 -framerate 60 -i rgb.out -vf "vflip" video.mp4 There are unlisted articles, also show them or only show them.