Applications of particle physics Updated 2025-01-10 +Created 1970-01-01
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ZynAddSubFX Updated 2025-01-10 +Created 1970-01-01
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Contains a large database of instruments, and allows you to edit them. This is a fun toy.
Instruments are edited on a GUI. It is a multi-window program, and you open new windows from new windows from new windows, all filled with hundreds of virtual knobs that you drag with your keyboard, and which would be better done from textual software like Csound. It is a thing of beauty.
It does not seem possible to program arbitrary modular synthesizer circuits therefore. But if you understand additive synthesis and subtractive synthesis well, you can make some funky sounds with it.
It is basically a superset of all popular hardware synthesizers ever made.
Has its own built-in MIDI keyboard which is nice.
On Ubuntu 20.04 Version: 3.0.5:
sudo apt install zynaddsubfx
zynaddsubfx -O alsa
as per askubuntu.com/questions/220802/no-sound-zynaddsubfx-and-jack-wont-run/1297988#1297988
To do anything of interest, switch to the Advanced UI:
  • Misc
  • Switch Interface Mode
The UI is completely different form what is shown on the website as of 2020: zynaddsubfx.sourceforge.io/, it looks instead like: www.youtube.com/watch?v=iVPr6iUuO3g Maybe on the website it is the new zyn-fusion UI... www.reddit.com/r/linuxaudio/comments/bxn3ur/some_help_for_installing_zynfusion_zynaddsubfx/ so confusing.
And they have some crappy policy of asking for 45 USD for binary downloads.
Compiling from source:
git clone https://github.com/zynaddsubfx/zynaddsubfx
cd zynaddsubfx
git checkout a789866de4d45a784c1f4d95fcf5a1938347baef
sudo apt build-dep zynaddsubfx
mkdir build
cd build
cmake ..
make -j`nproc`
fails with:
Traceback (most recent call last):
  File "/usr/bin/cxxtestgen", line 7, in <module>
    import cxxtest.cxxtestgen
  File "/usr/share/cxxtest/cxxtest/__init__.py", line 33, in <module>
    from cxxtest.cxxtestgen import *
  File "/usr/share/cxxtest/cxxtest/cxxtestgen.py", line 18, in <module>
    import __release__
ModuleNotFoundError: No module named '__release__'
Ciro gives up for now.
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Type of wiki Updated 2025-01-10 +Created 1970-01-01
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Quantum matter physics course of the University of Oxford Updated 2025-01-10 +Created 1970-01-01
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Notes/book: www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2022/QuantumMatter.pdf Marked as being for Oxford MMathPhys, so it appears that this is a 4th year course normally. TODO but where is it listed under the course list of MMapthPhys? mmathphys.physics.ox.ac.uk/course-schedule
  • Fermi Liquids
    • Weakly Interacting Fermions
    • Response Functions and Screening
      • Thomas Fermi
      • RPA
      • Plasmons
    • Landau Fermi Liquid Theory
  • Superfluidity
    • Two Fluid Model and Quantized Circulation
    • Landau Criterion for Superfluidity
    • Two Fluid Model for Superconductors
      • London Theory
      • Flux Vortices
      • Type I and Type II superconductors
    • Microscopic Superfluidity
      • Coherent States
      • Bose Condensation
      • Gross Pitaevskii Equation
      • Off Diagonal Long Range Order
      • Feynman Theory of Superfluidity (in book, but will skip in lectures. Not examinable)
    • Ginzburg Landau Theory of Superfluids
      • Neutral Superfluids
      • Charged Superfluids
      • Anderson - Higgs Mechanism
      • Rederviation of London Equations
      • Ginzburg - Landau Parameter and Type I/II revisited
      • Vortex Structure
  • BCS Theory of Superconductors
    • Phonons
    • The Cooper Problem
    • BCS wavefunction
    • Bogoliubov Excitation Spectrum
    • Majorana Physics
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Irreducible polynomial Updated 2025-01-10 +Created 1970-01-01
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Amazon AI accelerator silicon Updated 2025-01-10 +Created 1970-01-01
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Amazon EC2 GPU Updated 2025-01-10 +Created 1970-01-01
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As of December 2023, the cheapest instance with an Nvidia GPU is g4nd.xlarge, so let's try that out. In that instance, lspci contains:
00:1e.0 3D controller: NVIDIA Corporation TU104GL [Tesla T4] (rev a1)
TODO meaning of "nd"? "n" presumably means Nvidia, but what is the "d"?
Be careful not to confuse it with g4ad.xlarge, which has an AMD GPU instead. TODO meaning of "ad"? "a" presumably means AMD, but what is the "d"?
Some documentation on which GPU is in each instance can seen at: docs.aws.amazon.com/dlami/latest/devguide/gpu.html (archive) with a list of which GPUs they have at that random point in time. Can the GPU ever change for a given instance name? Likely not. Also as of December 2023 the list is already outdated, e.g. P5 is now shown, though it is mentioned at: aws.amazon.com/ec2/instance-types/p5/
When selecting the instance to launch, the GPU does not show anywhere apparently on the instance information page, it is so bad!
Also note that this instance has 4 vCPUs, so on a new account you must first make a customer support request to Amazon to increase your limit from the default of 0 to 4, see also: stackoverflow.com/questions/68347900/you-have-requested-more-vcpu-capacity-than-your-current-vcpu-limit-of-0, otherwise instance launch will fail with:
You have requested more vCPU capacity than your current vCPU limit of 0 allows for the instance bucket that the specified instance type belongs to. Please visit aws.amazon.com/contact-us/ec2-request to request an adjustment to this limit.
When starting up the instance, also select:
  • image: Ubuntu 22.04
  • storage size: 30 GB (maximum free tier allowance)
Once you finally managed to SSH into the instance, first we have to install drivers and reboot:
sudo apt update
sudo apt install nvidia-driver-510 nvidia-utils-510 nvidia-cuda-toolkit
sudo reboot
and now running:
nvidia-smi
shows something like:
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 525.147.05   Driver Version: 525.147.05   CUDA Version: 12.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  Tesla T4            Off  | 00000000:00:1E.0 Off |                    0 |
| N/A   25C    P8    12W /  70W |      2MiB / 15360MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|  No running processes found                                                 |
+-----------------------------------------------------------------------------+
From basically everything should just work as normal. E.g. we were able to run a CUDA hello world just fine along:
nvcc inc.cu
./a.out
One issue with this setup, besides the time it takes to setup, is that you might also have to pay some network charges as it downloads a bunch of stuff into the instance. We should try out some of the pre-built images. But it is also good to know this pristine setup just in case.
Some stuff we then managed to run:
curl https://ollama.ai/install.sh | sh
/bin/time ollama run llama2 'What is quantum field theory?'
which gave:
0.07user 0.05system 0:16.91elapsed 0%CPU (0avgtext+0avgdata 16896maxresident)k
0inputs+0outputs (0major+1960minor)pagefaults 0swaps
so way faster than on my local desktop CPU, hurray.
After setup from: askubuntu.com/a/1309774/52975 we were able to run:
head -n1000 pap.txt | ARGOS_DEVICE_TYPE=cuda time argos-translate --from-lang en --to-lang fr > pap-fr.txt
which gave:
77.95user 2.87system 0:39.93elapsed 202%CPU (0avgtext+0avgdata 4345988maxresident)k
0inputs+88outputs (0major+910748minor)pagefaults 0swaps
so only marginally better than on P14s. It would be fun to see how much faster we could make things on a more powerful GPU.
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São Paulo (state) Updated 2025-01-10 +Created 1970-01-01
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Water Updated 2025-01-10 +Created 1970-01-01
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"Water" is the name for both:
Figure 1.
Water in a glass
. Source.
Figure 2.
Ball-and-stick model of a water molecule
. Source.
Figure 3.
Simplified phase diagram of water
. Source. Note the triple point and critical point visible. Phase diagrams are so cool!
Figure 4.
Phase diagram of water
. Source. Note all the obscure phases of ice.
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Amazon Web Services Updated 2025-01-10 +Created 1970-01-01
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Stephen Hawking Updated 2025-01-10 +Created 1970-01-01
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While learning black-hole stuff is not on top of Ciro Santilli's priorities, Hawking's spirit is to be admired.
To never give up even when everything seems lost, and still have a sense of humour is respectable.
An ex-physicist colleague who had met Hawking told an anecdote. Hawking was around in the department one day, they said hi and all. But then Hawking wanted to tell a joke. It took like 5 minutes of typing, and you can imagine that things were pretty awkward and the joke's timing was "a bit off". But Hawking did tell the joke nonetheless.
This is also suggested in the The Theory of Everything (2014) film, and therefore likely the biographies.
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Marijuana plant Updated 2025-01-10 +Created 1970-01-01
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j(-> 1EGa1izEFDHzEobDDQny73re9BwXdzhZvH <-
j(                 ,
j(                dM
j(                MMr
j(               4MMML                  .
j(               MMMMM.                xf
j(              "M6MMM               .MM-
j( h..          +MM5MMM            .MMMM
j( .MM.         .MMMMML.          MMMMMh
j( )MMMh.        MM5MMM         MMMMMMM
j(  3MMMMx.     'MMM3MMf      xnMMMMMM"
j(  '*MMMMM      MMMMMM.     nMMMMMMP"
j(    *MMMMMx    "MMM5M\    .MMMMMMM=
j(     *MMMMMh   "MMMMM"   JMMMMMMP
j(       MMMMMM   GMMMM.  dMMMMMM
j(        MMMMMM  "MMMM  .MMMMM(        .n
j(         *MMMMx  MMM"  dMMMM"    .nnMMMM
j(Mn...     'MMMMr 'MM   MMM"   .nMMMMMMM*
j(4MMMMnn..   *MMM  MM  MMP"  .dMMMMMMM""
j( ^MMMMMMMMx.  *ML "M .M*  .MMMMMM**"
j(    *PMMMMMMhn. *x > M  .MMMM**""
j(       ""**MMMMhx/.h/ .=*"
j(                .3P"%....
j(              nP"     "*MMnx
The transaction before the ASCII art tx 9b08c00ced2bca4525d74e82db9af2aec8ef213eb1c1bf68a48b6be929968332 starts with what is likely a "Legalize" and must be a Tor Onion service:
j(-> 1EGa1izEFDHzEobDDQny73re9BwXdzhZvH <-
but that address as is + .onion is invalid, TODO find the correct one.
Other marijuana plants can be found contained entirely in single transactions:
tx d338da06d13a21a296506c0c8cd8c8533ba8fa076ff5c2c1fd02a457aac3ef77 via cryptograffiti.info contains a marihuana plant followed by a complaint:
[ mirrored by http://dmabraham.info/ | moarrr ]
[ CryptoGraffiti: Donate BTC: 1MVpQJA7FtcDrwKC6zATkZvZcxqma4JixS ]
[ Latest News: EU/Greece chaos due to huge debts! ]
[ Bless! ]

{ Supa - https://bitcoin-otc.com/viewratingdetail.php?nick=supa }
William Robert Girdlestone
1535 Dingwall RD Apt 35
Courtenay
British Columbia
Canada
V9N 3S8

( https://bitcointalk.org/index.php?topic=575743.0 )
[ One of the lowest rated #bitcoin-otc users, owing me at least 10 BTC ]
[ Most likely much more with compounding interesting, but its all ]
[ written off as a huge loss to me. Never again deal with him! ]
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Force of Will Updated 2025-01-10 +Created 1970-01-01
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ASCII art of a Force of Will, a famous and powerful Magic: The Gathering card first printed in 1996.
This is Ciro Santilli's personal favorite ASCII art he has found in the blockchain so far. Also Ciro could not find any other previous source of this, so there is some chance it is original. One can dream.
The choice of card is probably linked to the function of the card in the game of Magic: The Gathering. This card essentially prevents the opponent from casting a spell they are about to cast. The presumed intended meaning of this art is further accentuated by the old card type term "interrupt" (late renamed to "instant"), which suggests that "this ASCII art is an interruption to the normal monetary transactions of the blockchain".
One of also reminded of the prayer wars interruption attempts. We could not however identify anything specific that this ASCII art might have tried to interrupt besides the normal flow of monetary transactions.
If one goes full art critic mode, it is also tempting to draw a parallel between the card's "You may pay 1 life" alternative casting cost (as opposed to 5 mana, 3 and two blue, which is a very large cost for most games) as being a reference to the money spent by the uploader of the art to upload it.
TODO understand exactly how it was encoded and why it is so weird. The UUUU has a slightly weird encoding which we fixed by hand here TODO understand.
 -------------------------------------
|  Force of Will               3 U U  |
|  ---------------------------------  |
| |                  ////////////   | |
| |                ////() ()\////\  | |
| |               ///_\ (--) \///\  | |
| |        )      ////  \_____///\\ | |
| |       ) \      /   /   /    /   | |
| |    ) /   \     |   |  /   _/    | |
| |   ) \  (  (   /   / /   / \     | |
| |  / ) ( )  / (    )/(    )  \    | |
| |  \(_)/(_)/  /UUUU \  \\\/   |   | |
| .---------------------------------. |
| Interrupt                           |
| ,---------------------------------, |
| | You may pay 1 life and remove a | |
| | blue card in your hand from the | |
| | game instead of paying Force of | |
| | Will's casting cost.  Effects   | |
| | that prevent or redirect damage | |
| | cannot be used to counter this  | |
| | loss of life.                   | |
| | Counter target spell.           | |
| `---------------------------------` |
|                                     l
| Illus.  Terese Nelsen               |
 -------------------------------------
Figure 1.
Force of Will Magic: The Gathering card (Alliances)
Source. A high resolution scan of the original card depicted in the ASCII art for comparison.
The following two ASCII transactions:
tx 0f05c47a8caafadecc10d70ba3bf010eaf6bb416b5e1ad7b01cf3445f5fb7a1c
I am. Therefore, I have come to be.

-- Hyena


tx e6d48f6912929a58a2ee30c13768058777d8547215c27109b5cb0724e7abaaba
Erich,
Bro, this looks excellent!!
-Duriel
suggest this ASCII art might have been uploaded by Figure "Erich Erstu", AKA Hyena, creator of cryptograffiti.info, a service which would have allowed uploading ASCII content to the blockchain.
The only other mention of "Duriel" in the blockchain is tx 140562ceb42fc8943fa52ccc0ddbb11ca2d88dae9b5240d7a4b46864538c515a which has some freedom of speech comments and gives the email:
Duriel@paystamper.com = 1HcuhfTAiQCt6KdMG2rZLXsTcKYj9nLDhS
paystamper.com was some other blockchain service from circa 2015:
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Early AtomSea & EMBII uploads Updated 2025-01-10 +Created 1970-01-01
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These are of course likely all made by AtomSea & EMBII themselves while developing/testing their upload system.
They are also artsy peoeple themselves, and as pointed at twitter.com/AllenVandever/status/1563964396656812034 what they were doing was basicaly non-fungible token art, which became much much more popular a few years later around 2021.
The first upload that we could find at github.com/cirosantilli/bitcoin-inscription-indexer/tree/3f53e152ec9bb0d070dbcb8f9249d92f89effa70#atomsea-index was tx 44e80475dc363de2c7ee17b286f8cd49eb146165a79968a62c1c2c4cf80772c9 on block 272573 (2013-12-01) but it does not show on Bitfossil: bitfossil.org/44e80475dc363de2c7ee17b286f8cd49eb146165a79968a62c1c2c4cf80772c9/. This is was due to an upload bug explained by the following entry. By looking at the ASCII data at github.com/cirosantilli/bitcoin-inscription-indexer/blob/master/data/out/0272.txt#L449 that this is meant to contain the same content as the following message: a quote from the Bhagavad Gita, so this is definitely a bugged version of the following one.
The next one is tx c9d1363ea517cd463950f83168ce8242ef917d99cd6518995bd1af927d335828 on block 272577 (2013-12-02). It actually shows on bifossil and it reads:
I WONDER WHAT HISTORY WILL THINK ABOUT THESE FIRST FEW BUGS...HA HA HA. NOBODY IS PERFECT.
followed by:
He who regards
With an eye that is equal
Friends and comrades,
The foe and the kinsman,
The vile, the wicked,
The men who judge him,
And those who belong
To neither faction:
He is the greatest.
The bug message is definitely a reference to the previous non-visible bugged upload bitfossil.org/4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17/, TODO understand exactly how they fucked up. This illustrates the beauty of the blockchain very well: unlike with version control, you don't just see selected snapshots: you see actual debug logs!!!
Figure 1.
WeAreStarStuff.jpg
. Source.
The third AtomSea & EMBII upload, and the first actual image.
Message:
Photo etchin' test. #AtomSea #embii (photo by Travis Ehrich)
The image shows showingAtomSea and EMBII together, presumably photographed by this dude.
The filename is of course a reference to the quote/idea: We Are Made of Star-Stuff that was much popularized by Carl Sagan.
bitfossil.org/fac0b9a4f90414710b806fd286e020aea2404498946845ef3783f305dd4cd3a7 (2024-01-13) contains a cropped version with only AtomSea persent.
Figure 2.
HugPuddle.jpg
. Source.
The fourth AtomSea & EMBII upload, and the second image. Message:
HugPuddle Testing Apertus Disk Drive
And then finally we meet Chiharu, EMBII's partner, with her hair painted blond (she's Japanese): ILoveYouMore.jpg.
Then there's an approximation of pi as ASCII decimal fraction on tx 70fd289901bae0409f27237506c330588d917716944c6359a8711b0ad6b4ce76 from block 273522 (2013-12-07):
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989
tx b8b9f50a354166c46b69ecd47a0fbd20ee78c3471d2557bf275aff1b4cf4752d (2013-12-07, on bitfossil.org) contains Where the Sidewalk Ends by Shel Silverstein:
There is a place where the sidewalk ends
And before the street begins,
And there the grass grows soft and white,
And there the sun burns crimson bright,
And there the moon-bird rests from his flight
To cool in the peppermint wind.
Let us leave this place where the smoke blows black
And the dark street winds and bends.
Past the pits where the asphalt flowers grow
We shall walk with a walk that is measured and slow,
And watch where the chalk-white arrowls go
To the place where the sidewalk ends.
Yes we'll walk with a walk that is measured and slow,
And we'll go where the chalk-white arrows go,
For the children, they mark, and the children, they know
The place where the sidewalk ends.
tx 56768b30dec33bd284223d85c23087975e2360b3391d20d505aa59a5675e5379 (2013-12-13, on bitfossil.org):
Dear Aliens,
Hey.
Sincerely,
EMBII & AtomSea
bitfossil.org/73ca50321147bac9010bec43d63f7f76857fe9ede240cc89710e28723fdb242f/ (2013-12-14) has message:
MULTIFILE SUPPORT TEST
and links to 3 .txt files 1.txt, 2.txt, 3.txt containing single characters 1, 2, and 3.
Figure 3.
CompressedLogo.png
. Source.
2013-12-20. Message:
Colby Nelson and myself burnt the midnight oils designing the APERTUS imagery last night....
Thanks Colby for all your help.
Possibly www.linkedin.com/in/colby-nelson-59b538207/.
Contains an Apertus logo which is used on bitfossil.org/ itself, presumably they were designing that logo.
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Interesting AtomSea & EMBII uploads Updated 2025-01-10 +Created 1970-01-01
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tx e3e37ed5c1de2631c147bd39429e42ff634e95b7d72423bc32d6c6b9d8eef8ee (2014-07-01):
For my first official Journal entry I've decided to archive some old poetry. Here are a few of the computational poems I've created using cyphers.
Figure 1.
Shiemaa&Vincent.jpg
. Source.
Message:
"Even if we tried to do it on purpose, never would have we succeeded." My beloved Vincent.
TODO identify Shiemaa and Vincent.
Figure 2.
BikeLady.jpg
. Source. Bike Lady by Allen Lee Vandever. tx 2c4b9497af8c0c0eb9383357b40c3de33dba0b4f481099a32719f2b9036da8e7, block 319927 (2014-09-10)
Figure 3.
Arecibo_message.svg
. Source.
An "artificially" colored visualization of the Arecibo message ripped from Wikipedia: en.wikipedia.org/wiki/File:Arecibo_message.svg (with attribution).
The cool thing about this image is that it highlights the striking parallels between the encoding of the Arecibo message with crypto graffiti, because in both cases people were creating undocumented new ways of communicating with strangers on a new medium in those early blockchain days.
The associated message contains the Arecibo message as ASCII 0's and 1's. When properly cut at the newlines, they draw the message as ASCII art, as the original Arecibo encoding intends, here's a version with the 0's replaced by spaces to make it more readabale:
      1 1 1 1
  1 1     1 1       1
1   1   1   1  1 11  1
1 1 1 1 1 1 1 1  1  1

            11
          11 1
          11 1
          1 1 1
          11111

11    111   11    11
1             11  1
11 1   11   11    11 1
11111 11111 11111 11111

    1                 1

    1                 1
11111             11111

11    11    111   11
1       1         1
11 1    11   111  11 1
11111 11111 11111 11111

    1      11         1
          11
    1     11          1
11111     11      11111
          11
  1        1        1
    1      11       1
    11    11      1
      11   1    11
          11  11
      11   1    11
    11    11      1
    1      1        1
  1       11        1
  1        11        1
  1         1       1
  1       1       1
    1            11
    11        11
  1   111 1 11
  1       1
  1     11111
  1    1 111 1  1 11 11
      1  111  1  111111
1 111    111     11 111
          1 1     111 11
  1      1 1     111111
  1      1 1     11
  1     11 11

  111     1
  111 1 1   1 1 1 1 1 1
  111         1 1 1 1
              1 1
        11111
      111111111
    111       111
    11           11
  11 1         1 11
  11  11       11  11
  1   1 1     1 1   1
  1   1  1   1  1   1
      1   1 1   1
      1    1    1
      1         1
        1  1 1
  1111  11111 1  1111
Figure 4.
He sleeps in a temple.jpg
. tx 460ed23bea89176cdfe18e13fce51ad5386ad8e3e1f7d6f5b4711b3be97b0502, block 360565 (2015-06-12). EMBII claimed on Twitter that he took this photo in Auckland, New Zealand. The shop on the right corner has a sign that starts with "Bo" and searching for "Auckland Bo" gave us the "The body shop" on the corner of Queen Street and Darby Street. Some things changed between 2015 and 2024, notably the bench is gone and the shop on the left corner changed, but we can go back in time in Google Street View to 2015 which further confirms the location.
Figure 5.
PIA17563.jpg
. Source.
Associated message:
NASA: A purple nebula, in honor of #Prince, who passed away today. Image: Crab #Nebula, as Seen by Herschel and #Hubble Image credit: ESA/Herschel/PACS/MESS Key Programme Supernova Remnant Team; #NASA, ESA and Allison Loll/Jeff Hester (Arizona State University) #PIA17563
Figure 6.
Dr_Craig_Wright.jpg
. Source.
The image is present e.g. at: www.kitguru.net/channel/jon-martindale/australian-man-claims-he-is-satoshi-nakamoto-bitcoin-creator/ It was inscribed about two months after Craig publicly claimed that he is Satoshi.
This is a relatively unusual AtomSea & EMBII upload as it does not have the common toplevel transaction, everything, text + image fits into a single transaction. This is perhaps why the image is relatively low resolution to have a smaller size.
Figure 7.
YellowRobot.jpg
. Source.
Photography by EMBII, original art by TODO.
The associated message reads:
Chiharu and I found this little yellow robot while exploring Chicago. It will be covered by tar or eventually removed but this tribute will remain. N 41.880778 E -87.629210
This is one of Ciro's favorite AtomSea & EMBII uploads. This is the cutest thing ever, and perfectly encapsules the "medium as an artform" approach to blockchain art. More Chiharu stalking at: ILoveYouMore.jpg.
At twitter.com/EMBII4U/status/1615389973343268871 EMBII announced that he would be giving off shares of that image on a Bitcoin-based NFT sale system he's making called Sup!?, and in December 2023 gave some shares to Ciro Santilli. Amen.
Other possibly novel EMBII street photography:
Audio:
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HHTT Updated 2025-01-10 +Created 1970-01-01
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The Horrible Horrendous Terrible Tremendous Mining Pool inscribed a few cute Coinbase messages during their operation in 2012-2013.
Many of their messages also mention SockThing, which was part of their mining infrastructure:
Starting from their very first ASCII transaction on block 197602 (2012-09-07), there is what seems to be a poem spread across several transactions. Some of the lines are repeated, presumably because they didn't update the current line to a new line and so mined the same thing multiple times:
I am a pretty princess
covered in mud and blood
water with stuff in it
like everything else that wiggles or jiggles
screaming might not be your waY
see no reason to operate otherwise since
came into the world naked, wet and screaming
but silence will never be mine
until I am dead
but the smell will also give that away
gather all my things
load them in a big boat
airlift that to Kansas
and light it on fire
drop it from 7,000 feet
then railgun my corpse straight down
The sentences are not very coherent together, perhaps this is because lines were chosen by different miners one at a time.
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Massachusetts Updated 2025-01-10 +Created 1970-01-01
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Discogs Updated 2025-01-10 +Created 1970-01-01
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The IMDb of music! They actually have a reputation system apparently. And sneaked in a vinyl marketplace as well.
The website name sounds like play on words: disc + hog, with hog in the sense "memory-hog", i.e. something that consumes all your computer's memory.
Video 1.
Everything you need to know about discogs.com by Vinyl for Miles (2019)
Source. Gives a good overview of the website.
Video 2.
AnalogPlanet Interviews Discogs Founder Kevin Lewandowski (2019)
Source.
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Lecture 1 Updated 2025-01-10 +Created 1970-01-01
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Bibliography review:
Course outline given:
Non-relativistic QFT is a limit of relativistic QFT, and can be used to describe for example condensed matter physics systems at very low temperature. But it is still very hard to make accurate measurements even in those experiments.
Defines "relativistic" as: "the Lagrangian is symmetric under the Poincaré group".
Mentions that "QFT is hard" because (a finite list follows???):
There are no nontrivial finite-dimensional unitary representations of the Poincaré group.
But I guess that if you fully understand what that means precisely, QTF won't be too hard for you!
Notably, this is stark contrast with rotation symmetry groups (SO(3)) which appears in space rotations present in non-relativistic quantum mechanics.
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SPARQL tutorial Updated 2025-01-10 +Created 1970-01-01
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In this tutorial, we will use the Jena SPARQL hello world as a starting point. Tested on Apache Jena 4.10.0.
Basic query on rdf/vcard.ttl RDF Turtle data to find the person with full name "John Smith":
sparql --data=rdf/vcard.ttl --query=<( printf '%s\n' 'SELECT ?x WHERE { ?x <http://www.w3.org/2001/vcard-rdf/3.0#FN> "John Smith" }')
Output:
---------------------------------
| x                             |
=================================
| <http://somewhere/JohnSmith/> |
---------------------------------
To avoid writing http://www.w3.org/2001/vcard-rdf/3.0# a billion times as queries grow larger, we can use the PREFIX syntax:
sparql --data=rdf/vcard.ttl --query=<( printf '%s\n' '
PREFIX vc: <http://www.w3.org/2001/vcard-rdf/3.0#>
SELECT ?x
WHERE { ?x vc:FN "John Smith" }
')
Output:
---------------------------------
| x                             |
=================================
| <http://somewhere/JohnSmith/> |
---------------------------------
Bibliography:
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