Pi bond Updated +Created
Reflections of the Moon on Erquan Updated +Created
Composed by Abing in 1949[ref]
Video 1.
Reflections of the Moon on Erquan with erhu solo performed Song Fei
. Source.
Sex-ratio imbalance in China Updated +Created
Phanerozoic Updated +Created
The term "visible life" refers to multicellular from before people knew there was life in the proterozoic.
ASML Holding Updated +Created
As of 2020 leading makers of the most important fab photolithography equipment.
Video 1.
ASML: TSMC's Critical Supplier by Asianometry (2021)
Source.
Video 2.
How ASML Won Lithography by Asianometry (2021)
Source.
First there were dominant Elmer and Geophysics Corporation of America dominating the market.
Then a Japanese government project managed to make Nikon and Canon Inc. catch up, and in 1989, when Ciro Santilli was born, they had 70% of the market.
youtu.be/SB8qIO6Ti_M?t=240 In 1995, ASML had reached 25% market share. Then it managed the folloging faster than the others:
Cool data embedded in the Bitcoin blockchain / Len Sassaman tribute Updated +Created
Tribute to computer security researcher Len Sassaman, who killed himself on 2011-07-03, starting with an ASCII art portrait followed by text.
Because it comes so early in the blockchain, and because it is the first ASCII art on the blochain as far as we can see, and because is so well done, this is by far the most visible ASCII art of the Bitcoin blockchain.
Created by famous computer security researcher Dan Kaminsky and Travis Goodspeed, presumably this other security researcher, evidence:
"Bernanke" is a reference to Ben Bernanke, who was one of the economists in power in the US Government during the financial crisis of 2007-2008, and much criticized by some, as shown for example in the documentary Inside Job (2010). As hinted in the Genesis block message, the United States Government bailed out many big banks that were going to go bankrupt with taxpayer money, even though it was precisly those banks that had started the crisis through their reckless investment, thus violating principles of the free market and business accountability. This was one of the motivations for the creation Bitcoin, which could reduce government power over economic policy.
It is worth mentioning that there do exist some slightly earlier "artistic" inscriptions in the form Punycode inscription in the Namecoin blockchain, but as far as we've seen, the are all trivial compared to BitLen in terms of artistic value/size.
---BEGIN TRIBUTE---
#./BitLen
:::::::::::::::::::
:::::::.::.::.:.:::
:.: :.' ' ' ' ' : :
:.:'' ,,xiW,"4x, ''
:  ,dWWWXXXXi,4WX,
' dWWWXXX7"     `X,
 lWWWXX7   __   _ X
:WWWXX7 ,xXX7' "^^X
lWWWX7, _.+,, _.+.,
:WWW7,. `^"-" ,^-'
 WW",X:        X,
 "7^^Xl.    _(_x7'
 l ( :X:       __ _
 `. " XX  ,xxWWWWX7
  )X- "" 4X" .___.
,W X     :Xi  _,,_
WW X      4XiyXWWXd
"" ,,      4XWWWWXX
, R7X,       "^447^
R, "4RXk,      _, ,
TWk  "4RXXi,   X',x
lTWk,  "4RRR7' 4 XH
:lWWWk,  ^"     `4
::TTXWWi,_  Xll :..
=-=-=-=-=-=-=-=-=-=
LEN "rabbi" SASSAMA
     1980-2011
Len was our friend.
A brilliant mind,
a kind soul, and
a devious schemer;
husband to Meredith
brother to Calvin,
son to Jim and
Dana Hartshorn,
coauthor and
cofounder and
Shmoo and so much
more.  We dedicate
this silly hack to
Len, who would have
found it absolutely
hilarious.
--Dan Kaminsky,
Travis Goodspeed
P.S.  My apologies,
BitCoin people.  He
also would have
LOL'd at BitCoin's
new dependency upon
   ASCII BERNANKE
:'::.:::::.:::.::.:
: :.: ' ' ' ' : :':
:.:     _.__    '.:
:   _,^"   "^x,   :
'  x7'        `4,
 XX7            4XX
 XX              XX
 Xl ,xxx,   ,xxx,XX
( ' _,+o, | ,o+,"
 4   "-^' X "^-'" 7
 l,     ( ))     ,X
 :Xx,_ ,xXXXxx,_,XX
  4XXiX'-___-`XXXX'
   4XXi,_   _iXX7'
  , `4XXXXXXXXX^ _,
  Xx,  ""^^^XX7,xX
W,"4WWx,_ _,XxWWX7'
Xwi, "4WW7""4WW7',W
TXXWw, ^7 Xk 47 ,WH
:TXXXWw,_ "), ,wWT:
::TTXXWWW lXl WWT:
----END TRIBUTE----
Code 1.
Len Sassaman tribute
.
Figure 2.
Official portrait of Ben Bernanke (2008)
Source. Reference image from Wikipedia for the ASCII art.
Video 1.
Black OPS of TCP/IP by Dan Kaminsky (2011)
Source. Presented at the BlackHat 2011 conference. Dan unveils the Len memorial at the given timestamp around 8:41. The presentation was done on 2011-08-03 or 04, so very few days after the upload to the blockchain.
From the JSON transaction we understand the encoding format:
   "out":[
      {
         "spent":false,
         "tx_index":0,
         "type":0,
         "addr":"1CqKQ2EqUscMkeYRFMmgepNGtfKynXzKW7",
         "value":1000000,
         "n":0,
         "script":"76a91481ccb4ee682bc1da3bda70176b7ccc616a6ba9da88ac"
      },
      {
         "spent":false,
         "tx_index":0,
         "type":0,
         "addr":"157sXa7duStAvq3dPLWe7J449sgh47eHzw",
         "value":1000000,
         "n":1,
         "script":"76a9142d2d2d424547494e20545249425554452d2d2d2088ac"
      },
...
      {
         "spent":false,
         "tx_index":0,
         "type":0,
         "addr":"157sXYpjvAyEJ6TdVFaVzmoETAQnHB6FGU",
         "value":1000000,
         "n":77,
         "script":"76a9142d2d2d2d454e4420545249425554452d2d2d2d2088ac"
      }
So it is really encoded one line at a time in the script of the transaction outputs.
Stereochemistry Updated +Created
Molecules that are the same if you just look at "what atom is linked to what atom", they are only different if you consider the relative spacial positions of atoms.
Astera Institute Updated +Created
By the rich founder of Mt. Gox and Ripple, Jed McCaleb.
Obelisk is the Artificial General Intelligence laboratory at Astera. We are focused on the following problems: How does an agent continuously adapt to a changing environment and incorporate new information? In a complicated stochastic environment with sparse rewards, how does an agent associate rewards with the correct set of actions that led to those rewards? How does higher level planning arise?
Astronomy Updated +Created
Ciro Santilli likes to learn astronomy a bit like he learns geography: go down some lists of "stuff that seems most relevant in some criteria to us!", possibly at different size scales e.g.:
Charity school Updated +Created
United States Armed Forces Updated +Created
sqlite3 Node.js package Updated +Created
Includes its own copy of sqlite3, you don't use the system one, which is good to ensure compatibility. The version is shown at: github.com/mapbox/node-sqlite3/blob/918052b538b0effe6c4a44c74a16b2749c08a0d2/deps/common-sqlite.gypi#L3 SQLite source is tracked compressed in-tree: github.com/mapbox/node-sqlite3/blob/918052b538b0effe6c4a44c74a16b2749c08a0d2/deps/sqlite-autoconf-3360000.tar.gz horrendous. This explains why it takes forever to clone that repository. People who don't believe in git submodules, there's even an official Git mirror at: github.com/sqlite/sqlite
It appears to spawn its own threads via its C extension (since JavaScript is single threaded and and SQLite is not server-based), which allows for parallel queries using multiple threads: github.com/mapbox/node-sqlite3/blob/v5.0.2/src/threading.h
As of 2021, this had slumped back a bit, as maintainers got tired. Unmerged pull requests started piling more, and better-sqlite3 Node.js package started pulling ahead a little.
Year 3 of the physics course of the University of Oxford Updated +Created
Legendre's three-square theorem Updated +Created
async (JavaScript) Updated +Created
async is all present in JavaScript for two reasons:
Athlete Updated +Created

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