Hello world adapted from: github.com/liabru/matter-js/wiki/Getting-started/1d138998f05766dc4de0e44ae2e35d03121bb7f2
Also asked at: stackoverflow.com/questions/28079138/how-to-make-minimal-example-of-matter-js-work/76203103#76203103
Renderer questions:
- follow object on viewport: codepen.io/csims314/pen/goZQvG
- draw text: github.com/liabru/matter-js/issues/321
Split in energy levels due to interaction between electron up or down spin and the electron orbitals.
Numerically explained by the Dirac equation when solving it for the hydrogen atom, and it is one of the main triumphs of the theory.
- the best full featured free OS we have today, since POSIX gave up short of any UI specification, and Chrome OS is not there yet
- usable and likely efficient Java API for apps if Oracle doesn't manage to destroy it with its lawsuit
However, many, many, many terrible horrors come with it:
- it hasn't made the move to desktop for too many years. It could destroy Microsoft Windows and replace it with open source, but they just won't budge towards an unified mobile/desktop setup.
- vendors litter it with uninstallable bloatware that should be illegal. European Union to the rescue!!! www.cnbc.com/2020/12/15/digital-markets-act-eus-new-rules-on-big-tech.html
- vendors lock down devices so it is very hard to get sudo, let alone to modify their images!
- there isn't enough hardware standardization for open source distros to thrive like on desktop
- code drops mean that "master" is useless and trying to contribute from outside vendors' closed walls is a waste of time: stackoverflow.com/questions/1809774/how-to-compile-the-android-aosp-kernel-and-test-it-with-the-android-emulator/48310014#48310014
- if you ever go below the Java API, e.g. to C++ or AOSP build, everything is horrendous and undocumented
- Google doesn't care about the CLI, even the hello world requires creating infinite out-of-control boilerplate from a GUI: stackoverflow.com/questions/20801042/how-to-create-android-project-with-gradle-from-command-line/46994747#46994747
- the boot is uber bloated and takes forever in cycle simulators
Far field approximation to Kirchhoff's diffraction formula, i.e. when the plane of observation is far from the object diffracting.
@cirosantilli/_file/python/sympy_cheat/python/sympy_cheat/logarithm_integral.py Updated 2024-12-23 +Created 1970-01-01
- against all odds, the experiment worked and we got DNA out of the water, despite a bunch of non-bio newbs actively messing with random parts of the experiment
- PuntSeq and Biomakespace people, and all those tho do scientific outreach, are awesome!
- biology is hard
- creating insanely media rich articles like this is also hard, but the following helped enormously:
- Wikimedia Commons to store large media files out of Git
- Asciidoctor extensions to easily include those media files. The lessons learnt in this article were then an important motivation for Ciro's OurBigBook Markup, to which this article was later migrated.
- Nomacs to give Google Photos photos meaningful names and to edit people's faces out of pictures ;-)
- some scientific Wikipedia pages may or may not have been edited with better pictures during the course of writing this article
The normal navigation to them was paywalled, but the static files are served without login checks if you know their URL. One way to go about it is to search by prefix on the Wayback Machine: web.archive.org/web/*/https://www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/*
The last handbooks we can find are 2020/2021, they might have move to a new more properly paywalled location after that year.
- 2020/2021:
- Year 1: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y1-ug-handbook-2020-2021-final-47501.pdf
- Year 2: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y2-ug-handbook-2020-2021-final-47495.pdf
- Year 3: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y3-ug-handbook-2020-2021-final-47496.pdf
- Year 4: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y4-ug-handbook-2020-2021-final-47497.pdf
- Physics and Philosophy: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/pphandbook-47524.pdf
- 2019/2020. They seem to have split the handbook up per year after some point.
- Year 1: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y1-ug-handbook-2019-2020-final-8october2019-45541.pdf
- Year 2: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y2-ug-handbook-2019-2020-final-8-october2019-45542.pdf
- Year 3: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y3-ug-handbook-2019-2020-updated-21november2019-45955.pdf
- Year 4: www2.physics.ox.ac.uk/sites/default/files/contentblock/2011/06/03/y4-ug-handbook-2019-2020-final-8october2019-45544.pdf
- 2016/2017: www2.physics.ox.ac.uk/sites/default/files/2011-06-03/course_v3_pdf_80151.pdf 2022 archive: web.archive.org/web/20221229021312/https://www2.physics.ox.ac.uk/sites/default/files/2011-06-03/course_v3_pdf_80151.pdfThis older handbook had a more detailed course breakdown in terms of terms and weeks, e.g. on page 19.
When using SQL REPEATABLE READ isolation level and SQL SERIALIZABLE isolation level, concurrent transactions may fail with a serialization failure, and then you might need to retry them. You server code or your ORM must always account for that.
A good way to explore when it happens is to use the example
Related questions:
- stackoverflow.com/questions/7705273/what-are-the-conditions-for-encountering-a-serialization-failure
- stackoverflow.com/questions/59351109/error-could-not-serialize-access-due-to-concurrent-update
- stackoverflow.com/questions/50797097/postgres-could-not-serialize-access-due-to-concurrent-update/51932824
Superconducting qubits are bad because of fabrication variation Updated 2024-12-23 +Created 1970-01-01
Atom-based qubits like trapped ion quantum computers have parameters fixed by the laws of physics.
However superconducting qubits have a limit on how precise their parameters can be set based on how well we can fabricate devices. This may require per-device characterisation.
Football is a synonym for association football, can we be done with that! The word "soccer" is an aberration.
See also Ciro Santilli's critique of rooting for sport teams.
Why football is the most popular sport in the world by Desmond Morris
. Source. More info at Video "Why football is the most popular sport in the world by Desmond Morris".The only cases where formal proof of theorems seem to have had actual mathematical value is for theorems that require checking a very large number of case, so much so that no human can be fully certain that no mistakes were made. Some examples:
We need this. The five day week is designed to suck all the mental life of an average mental worker person, and it leaves basically nothing if they "do their job really well".
Advocacy groups:
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