Work log by Ciro Santilli 35 Updated +Created
ORF1ab by Ciro Santilli 35 Updated +Created
Virus by Ciro Santilli 35 Updated +Created
Chinese slang by Ciro Santilli 35 Updated +Created
Cray by Ciro Santilli 35 Updated +Created
Tomb of Cyrus by Ciro Santilli 35 Updated +Created
Fraction by Ciro Santilli 35 Updated +Created
Superconductivity by Ciro Santilli 35 Updated +Created
Experiments:
  • "An introduction to superconductivity" by Alfred Leitner originally published in 1965, source: www.alfredleitner.com/
  • Isotope effect on the critical temperature. hyperphysics.phy-astr.gsu.edu/hbase/Solids/coop.html mentions that:
    If electrical conduction in mercury were purely electronic, there should be no dependence upon the nuclear masses. This dependence of the critical temperature for superconductivity upon isotopic mass was the first direct evidence for interaction between the electrons and the lattice. This supported the BCS Theory of lattice coupling of electron pairs.
Video 1.
20. Fermi gases, BEC-BCS crossover by Wolfgang Ketterle (2014)
Source. Part of the "Atomic and Optical Physics" series, uploaded by MIT OpenCourseWare.
Actually goes into the equations.
Notably, youtu.be/O_zjGYvP4Ps?t=3278 describes extremely briefly an experimental setup that more directly observes pair condensation.
Video 2.
Superconductivity and Quantum Mechanics at the Macro-Scale - 1 of 2 by Steven Kivelson (2016)
Source. For the Stanford Institute for Theoretical Physics. Gives a reasonable basis overview, but does not go into the meat of BCS it at the end.
Video 3. . Source. Lacking as usual, but this one is particularly good as the author used to work on the area as he mentions in the video.
Media:
  • Cool CNRS video showing the condensed wave function, and mentioning that "every pair moves at the same speed". To change the speed of one pair, you need to change the speed of all others. That's why there's not energy loss.
Transition into superconductivity can be seen as a phase transition, which happens to be a second-order phase transition.
3Blue1Brown by Ciro Santilli 35 Updated +Created
Amazing graphs and formulas.
Python graphics engine open sourced at: github.com/3b1b/manim "Animation engine for explanatory math videos". But for some reason there is a community fork: github.com/ManimCommunity/manim/ "This repository is maintained by the Manim Community, and is not associated with Grant Sanderson or 3Blue1Brown in any way (though we are definitely indebted to him for providing his work to the world). If you want to study how Grant makes his videos, head over to his repository (3b1b/manim). This is a more frequently updated repository than that one, and is recommended if you want to use Manim for your own projects." what a mess.
The simplest multicellular species by Ciro Santilli 35 Updated +Created
One of the simplest known seems to be: en.wikipedia.org/wiki/Trichoplax
www.u-tokyo.ac.jp/focus/en/articles/a_00220.html "The simplest multicellular organism unveiled" from 2013 mentions Tetrabaena socialis.
Then of course: Caenorhabditis elegans is a relatively simple and widely studied model organism.
Video 1.
Nicole King (UC Berkeley, HHMI) 1: The origin of animal multicellularity by iBiology (2015)
Source.
Inverse element by Ciro Santilli 35 Updated +Created
Some specific examples:
Congruent matrix by Ciro Santilli 35 Updated +Created
Two symmetric matrices and are defined to be congruent if there exists an in such that:
IP range search by Ciro Santilli 35 Updated +Created
One promising way to find more of those would be with IP searches, since it was stated in the Reuters article that the CIA made the terrible mistake of using several contiguous IP blocks for those website. What a phenomenal OPSEC failure!!!
The easiest way would be if Wayback Machine itself had an IP search function, but we couldn't find one: Search Wayback Machine by IP.
viewdns.info was the first easily accessible website that Ciro Santilli could find that contained such information.
Our current results indicate that the typical IP range is about 30 IPs wide.
E.g. searching: viewdns.info/iphistory and considering only hits from 2011 or earlier we obtain:
  • capture-nature.com
    • 65.61.127.163 - Greenacres - United States - TierPoint - 2013-10-19
  • activegaminginfo.com
    • 66.175.106.148 - United States - Verizon Business - 2012-03-03
  • iraniangoals.com
    • 68.178.232.100 - United States - GoDaddy.com - 2011-11-13
    • 69.65.33.21 - Flushing - United States - GigeNET - 2011-09-08
  • rastadirect.net
    • 68.178.232.100 - United States - GoDaddy.com - 2011-05-02
  • iraniangoalkicks.com
    • 68.178.232.100 - United States - GoDaddy.com - 2011-04-04
  • headlines2day.com
    • 118.139.174.1 - Singapore - Web Hosting Service - 2013-06-30. Source: viewdns.info
    • 184.168.221.91 2013-08-12T06:17:39. Source: 2013 DNS Census grep
  • fightwithoutrules.com
    • 204.11.56.25 - British Virgin Islands - Confluence Networks Inc - 2013-09-26
    • 208.91.197.19 - British Virgin Islands - Confluence Networks Inc - 2013-05-20
    • 212.4.17.38 - Milan - Italy - MCI Worldcom Italy Spa - 2012-03-03
  • fitness-dawg.com
    • 219.90.62.243 - Taiwan - Verizon Taiwan Co. Limited - 2012-01-11
Neither of these seem to be in the same ranges, the only common nearby hit amongst these ranges is the exact 68.178.232.100, and doing reverse IP search at viewdns.info/reverseip/?host=68.178.232.100&t=1 states that it has 2.5 million hostnames associated to it, so it must be some kind of Shared web hosting service, see also: superuser.com/questions/577070/is-it-possible-for-many-domain-names-to-share-one-ip-address, which makes search hard.
Ciro then tried some of the other IPs, and soon hit gold.
Initially, Ciro started by doing manual queries to viewdns.info/reversip until his IP was blocked. Then he created an account and used his 250 free queries with the following helper script: cia-2010-covert-communication-websites/viewdns-info.sh. The output of that script can be seen at: github.com/cirosantilli/media/blob/master/cia-2010-covert-communication-websites/viewdns-info.sh.
Ciro then found 2013 DNS Census which contained data highly disjoint form the viewdns-info one!
Summaries of the IP range exploration done so far follows, combined data from all databases above.
Verilator by Ciro Santilli 35 Updated +Created
Verilog simulator that transpiles to C++.
One very good thing about this is that it makes it easy to create test cases directly in C++. You just supply inputs and clock the simulation directly in a C++ loop, then read outputs and assert them with assert(). And you can inspect variables by printing them or with GDB. This is infinitely more convenient than doing these IO-type tasks in Verilog itself.
Some simulation examples under verilog.
First install Verilator. On Ubuntu:
sudo apt install verilator
Tested on Verilator 4.038, Ubuntu 22.04.
Run all examples, which have assertions in them:
cd verilator
make run
File structure is for example:
Example list:
Pleistocene by Ciro Santilli 35 Updated +Created
Agriculture is not the official definition of the age. But it is good enough. Likely related to the official end of glaciations thing.
Wayback Machine CDX scanning with Tor parallelization by Ciro Santilli 35 Updated +Created
Dire times require dire methods: cia-2010-covert-communication-websites/cdx-tor.sh.
First we must start the tor servers with the tor-army command from: stackoverflow.com/questions/14321214/how-to-run-multiple-tor-processes-at-once-with-different-exit-ips/76749983#76749983
tor-army 100
and then use it on a newline separated domain name list to check;
./cdx-tor.sh infile.txt
This creates a directory infile.txt.cdx/ containing:
  • infile.txt.cdx/out00, out01, etc.: the suspected CDX lines from domains from each tor instance based on the simple criteria that the CDX can handle directly. We split the input domains into 100 piles, and give one selected pile per tor instance.
  • infile.txt.cdx/out: the final combined CDX output of out00, out01, ...
  • infile.txt.cdx/out.post: the final output containing only domain names that match further CLI criteria that cannot be easily encoded on the CDX query. This is the cleanest domain name list you should look into at the end basically.
Since archive is so abysmal in its data access, e.g. a Google BigQuery would solve our issues in seconds, we have to come up with creative ways of getting around their IP throttling.
The CIA doesn't play fair. They're actually the exact opposite of fair. So neither shall we.
This should allow a full sweep of the 4.5M records in 2013 DNS Census virtual host cleanup in a reasonable amount of time. After JAR/SWF/CGI filtering we obtained 5.8k domains, so a reduction factor of about 1 million with likely very few losses. Not bad.
5.8k is still a bit annoying to fully go over however, so we can also try to count CDX hits to the domains and remove anything with too many hits, since the CIA websites basically have very few archives:
cd 2013-dns-census-a-novirt-domains.txt.cdx
./cdx-tor.sh -d out.post domain-list.txt
cd out.post.cdx
cut -d' ' -f1 out | uniq -c | sort -k1 -n | awk 'match($2, /([^,]+),([^)]+)/, a) {printf("%s.%s %d\n", a[2], a[1], $1)}' > out.count
This gives us something like:
12654montana.com 1
aeronet-news.com 1
atohms.com 1
av3net.com 1
beechstreetas400.com 1
sorted by increasing hit counts, so we can go down as far as patience allows for!
New results from a full CDX scan of 2013-dns-census-a-novirt.csv:
  • 219.90.61.123 journeystravelled.com
Permutation group by Ciro Santilli 35 Updated +Created
Pinned article: ourbigbook/introduction-to-the-ourbigbook-project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Video 1.
Intro to OurBigBook
. Source.
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
    Video 2.
    OurBigBook Web topics demo
    . Source.
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    • to OurBigBook.com to get awesome multi-user features like topics and likes
    • as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact