Angiotensin-converting enzyme 2 Updated +Created
UniProt human: www.uniprot.org/uniprot/Q9BYF1 It is interesting to see in the Mutagenesis how many known mutations can increase or decrease SARS-CoV-2 S protein binding affinity.
Classical group Updated +Created
Guqin piece Updated +Created
MySQL Updated +Created
Create user for further logins without sudo askubuntu.com/questions/915585/how-to-login-mysql-shell-when-mysql-have-no-password/1325689#1325689:
sudo mysql -e "CREATE USER $USER"
Create test user with password:
sudo mysql -e 'CREATE USER user0 IDENTIFIED WITH mysql_native_password BY "a"'
sudo mysql -e 'GRANT ALL PRIVILEGES ON database_name.* TO "user0"'
and login as that user:
mysql -u user0 -p
Login with password given on the command line:
mysql -u user0 -pmypassword
The IDENTIFIED WITH mysql_native_password part is to overcome "Client does not support authentication protocol requested by server" when connecting from Node.js.
List users:
sudo mysql -e 'SELECT * FROM mysql.user'
View permissions for each user on each DB: serverfault.com/questions/263868/how-to-know-all-the-users-that-can-access-a-database-mysql
sudo mysql -e 'SELECT * FROM mysql.db'
List databases:
sudo mysql -e 'SHOW DATABASES'
Create database:
sudo mysql -e 'CREATE DATABASE mydb0'
Destroy database:
sudo mysql -e 'DROP DATABASE mydb0'
Show tables in database:
sudo mysql -e 'SHOW TABLES' mydb0
or:
sudo mysql -e 'SHOW TABLES FROM mydb0'
Particle accelerator Updated +Created
Physics Updated +Created
Physics (like all well done science) is the art of predicting the future by modelling the world with mathematics.
And predicting the future is the first step towards controlling it, i.e.: engineering.
Ciro Santilli doesn't know physics. He writes about it partly to start playing with some scientific content for: OurBigBook.com, partly because this stuff is just amazingly beautiful.
Ciro's main intellectual physics fetishes are to learn quantum electrodynamics (understanding the point of Lie groups being a subpart of that) and condensed matter physics.
Every science is Physics in disguise, but the number of objects in the real world is so large that we can't solve the real equations in practice.
Luckily, due to emergence, we can use uglier higher level approximations of the world to solve many problems, with the complex limits of applicability of those approximations.
Therefore, such higher level approximations are highly specialized, and given different names such as:
As of 2019, all known physics can be described by two theories:
Unifying those two into the theory of everything one of the major goals of modern physics.
Figure 1.
xkcd 435: Fields arranged by purity
. Source. Reductionism comes to mind.
Reductionism Updated +Created
Sticker album Updated +Created
An Introduction to Tensors and Group Theory for Physicists by Nadir Jeevanjee (2011) Updated +Created
This does not seem to go deep into the Standard Model as Physics from Symmetry by Jakob Schwichtenberg (2015), appears to focus more on more basic applications.
But because it is more basic, it does explain some things quite well.
An LC circuit is analogous to a spring-mass system Updated +Created
In the LC circuit:
You can kickstart motion in either of those systems in two ways:
Annapurna Labs Updated +Created
Page contains a good summary of their hardware to date. They seem to still be the centerpiece of silicon development. There are still however people outside of Israel doing it, e.g.: www.linkedin.com/in/laurasharpless/ says as of 2021:
My team develops software for our next-generation Machine Learning accelerators: HAL, firmware, and SoC models.
2021: networking chip reports emerge: www.theverge.com/circuitbreaker/2021/3/30/22358633/amazon-reportedly-custom-network-switch-silicon-aws, presumably contesting with the likes of Cisco?
City in Taiwan Updated +Created
Parlour game Updated +Created
The eye in Ciro Santilli's website banner Updated +Created
Ciro was trying to make his face fit on the banner. But it is hard because faces are square and text is long.
Then at one point, the CSS was a bit broken and the eye stuck out just left of Ciro Santilli.
At this moment, Ciro knew what to do.
This produced a "continuous image symbol to text" effect that felt so right.
The concept, like any other, is not in itself new and has been used by others, Ciro just independently rediscovered it again:
Zone of Avoidance Updated +Created
Gel electrophoresis Updated +Created
Technique widely used to measure the size of DNA strands, most often PCR output of a region of interest.
A simple sample application is gel electrophoresis alelle determination.
Metabolomics Updated +Created
Microplate Updated +Created

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