There's a chemistry tree.

Looks like good fun, and the data that makes up the genealogy is shared under a CC-BY license (bulk data export requires contacting the site admin), but I have found no mention of the license for the code of the website/project.

Their FAQ is very informative.

Gitea is great. So is Codeberg. The ability to share repos, issues, and users across Gitea instances, would be awesome.

Git itself is already federated and decentralised, but there is still a need for federation of the remote repo and its facilities.

The idea of some sort of federation between Gitea instances has been around since 2016.

• https://forgefriends.org/blog/2021/11/22/what-is-forgefriends/
• https://social.gitea.io/@gitea/1075767916260526973
• https://forum.forgefriends.org/t/nlnet-grant-application-for-federation-in-gitea-deadline-october-1st-2021/354
• https://forum.forgefriends.org/t/forge-federation-webinar-january-19th-2022-10am-noon-utc-1/538#a-10000-feet-view-of-problems-with-forge-silos-and-their-solutions-4
• Software Forge performance index (maintained by SourceHut)

• i3wm, tiling window manager for X11.
• sway, drop-in replacement for i3wm on Wayland.
• enlightenment, window manager, compositor and minimal desktop. Not tiling. Supports X11, experimental Wayland support.

There are many more window managers. Add more as I (re)discover them.

Citation File Format (CFF), a YAML 1.2-based format for providing citation metadata for (research/scientific) software.

• CFF github repo
• Guide to the CFF v1.2 schema, including such niceties as credit redirection
• One of many CFF file generators (here is a table of other tools).
• Making software citation easi(er) - The Citation File Format and its integrations, slides for a presentation by Stephan Druskat (one of the CFF maintainers).
• There are, of course, R-based CFF generators. cffr is backed by rOpenSci.
• Stephan Druskat's cfftracker answers the question: how many repos on Github contain CITATION.cff files? At the moment just north of 1000 repos (less than I thought, to be honest). Keep adding CFF to your scientific repos, people :-)

Via Martin Fenner (twice over).

or more accurately, how to get around them.

12ft Ladder by Thomas Millar uses a very clever approach - pretend to be the Google crawler!

Does not work for every site (some sites are clearly more serious about locking away their content - one could ask why they even bother publishing on the web?) but works for many.

• https://twitter.com/thmsmlr/status/1345197682449477632

Only negative is that the code behind 12ft is not available. Which means that the service will only live for as long as the domain stays up, which by the way is hosted by Vercel. Also, any article URLs (along with other metadata such as your IP address) might be logged by the web service or their service providers.

I found myself in need of a source of emojis that could be easily copy-pasted.

In order of decreasing useability:

• https://unicode.org/emoji/charts/full-emoji-list.html
• https://getemoji.com/
• https://reddit.com/r/copypasta/comments/7l0pin/every_emoji_in_emoji10/

Here are some more:

• Complete list of github markdown emoji markup
• https://github.com/markdown-templates/markdown-emojis
• https://github.com/scotch-io/All-Github-Emoji-Icons

By Han-Kwang Nienhuys, lagom.nl.

A recent report by Digital Lab highlights their security and data integrity practices, and also examines their ownership structures, clearly demonstrating that many VPN "brands" are owned by the same companies, many of whose owners or executives have known prior legal or moral problems.

Some VPN services are honest in their marketing, though. Still, many (including some of the more popular) employ dark patterns, e.g., making it unnecessarily hard to cancel subscriptions, or auto-renewing subscriptions, etc.

Read for yourself: "Security and Privacy of VPNs Running on Windows 10", by Digital Lab at Consumer Reports, which is an illuminating expose of 16 commercial VPN services.

Via kryptera.se, Swedish, who also graciously hosts the report (PDF, English).

Take care to define what you are trying to achieve before deciding to subscribe to a VPN. Do you primarily want to hide your web traffic from your ISP? A VPN can do that, but you are simply substituting your ISP for the ISP of the VPN provider.
But if all you want is to change the apparent geographic location of your traffic, then a VPN works fine. But you could just as easily make do with a proxy server.

PS. Do you have an extra computer or a Raspberry Pi lying around? Well, then you could build your own virtual private network. This is particularly useful when travelling abroad or anytime you have to use someone else's network.

• https://arstechnica.com/gadgets/2017/05/how-to-build-your-own-vpn-if-youre-rightfully-wary-of-commercial-options/
• https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-18-04

Turns out this is harder than it should be.

First of all, you need to run Fennec (from F-Droid) and not Firefox (from Google's Play store), and you need to enable debug mode (which is incidentally a requirement for Firefox sync using a custom server). Note that even if you have previously enabled Firefox sync using a custom server, you must re-enable debug mode again for the custom add-on collection setting to become visible.

To enable debug mode, open Settings, click on About Fennec, then click on the logo a number of times until a popup that says debug mode is enabled pops up.

Now you will find a section called Custom Add-on collection in the Fennec settings.
Create your own custom collection by going to https://addons.mozilla.org/en-US/firefox/collections, login using your Firefox account (you have to create a Firefox "profile", whatever that is).

My add-on collection: ID: 17175532, name: fennec.
Fennec will quit automatically at this point. Restart it, and now you can install any of the add-ons in your collection.

Side-note: it's too bad that Mozilla forces us through these hoops to use extensions on Android. I hope this becomes easier in the future.

• https://blog.dbmiller.org/2021-08-19-using-fennec-or-mull-for-extensible-and-secure-browsing-on-android
• https://reddit.com/r/fossdroid/comments/p7mgec/guide_using_most_all_firefox_addons_on_fennec_on/
• http://hackerpublicradio.org/eps.php?id=3851

What I could find about some of the popular crypto exchanges.

Both Crypto.com and Coinbase are crypto exchanges and each offers its own native coin.

crypto.com

Foris DAX MT Limited, a company incorporated in Malta with Company number (C88392) trading under the name “Crypto.com” via the Crypto.com app is licensed as a Class 3 Virtual Financial Assets Service Provider by the Malta Financial Services Authority.
Foris DAX MT Limited is authorised to provide the following VFA services: 1. execution of orders on behalf of other persons; 2. dealing on own account; and 3. custodian or nominee services to experienced and non-experienced investors.
https://crypto.com

If you are a U.S. resident, your USD balances are held at Metropolitan Commercial Bank, an FDIC member and insured depository institution. Your USD balances held at Metropolitan Commercial Bank are insured up to USD $250,000. You retain ownership of those funds in Metropolitan Commercial Bank accounts, meaning your fiat funds cannot be claimed by Crypto.com or its creditors.
https://crypto.com/eea/security

Malta is a member of the European union and a member of the Economic and Monetary Union. Men innebär det att insättningsskyddet gäller? Inte än, om jag förstått saken rätt.

Ett europeiskt insättningsgarantisystem är under uppbyggnad. För mig ännu oklart om Sverige är del i detta (vi är ju utanför euro-zonen, men är vi med i bankunionen?).

A proposed European deposit insurance scheme, the European commission.

Foris DAX MT Limited (listing on opencorporates.com) is incorporated in Malta and headquartered in Singapore.

crypto.com appears to have its own subreddit.

coinbase

Coinbase Global

comparisons

• https://www.investopedia.com/crypto-com-vs-coinbase-5188428
• https://www.marketplacefairness.org/cryptocurrency/crypto-com-vs-coinbase/

talking about crypto

• https://markets.businessinsider.com/news/stocks/cro-crypto-could-be-a-bargain-at-these-levels-especially-if-the-crypto-com-ads-with-matt-damon-work-1031047827
• https://www.inc.com/magazine/202112/bill-saporito/brian-armstrong-coinbase-blockchain-bitcoin-crypto-nfts.html

what if the exchange goes bust?

• https://www.creditslips.org/creditslips/2022/02/what-happens-if-a-cryptocurrency-exchange-files-for-bankruptcy.html
• https://cointelegraph.com/news/75-crypto-exchanges-have-closed-down-so-far-in-2020

I show you how how I made spinning water droplets

Neat!
Read the paper here: https://www.nature.com/articles/s41467-019-08919-2

في ذكرى المولد النبوي الشريف خطبة الجمعة من الجامع الأزهر مع د./أحمد عمر هاشم، عضو هيئة كبار العلماء

Global maps

• OpenStreetMap
  A list of apps and services built on OpenStreetMap
• Two maps at the same scale (side-by-side maps) by Josh Horowitz via FlowingData
• Near real-time visualisation of global weather conditions (see my note for background)
• Great Circle map
• World population density, by Dr Duncan Smith at University College London.
• Offshore wind power plants via @davidho@mastodon.world.
• OpenRailwayMap, the world's railway lines overlaid on OpenStreetMap (freight lines, passenger lines, high-speed lines, metro systems, and more). Via Rubenerd.
• Native Land - map Indigenous territories, treaties, and languages.

Apps

• OsmAnd (OpenStreetMaps Android)
• Guru Maps, on Play Store

Sverige-kartor

• Skapa och skriv ut (PDF) din egen karta i skala 1:10000 eller 1:50000 (Lantmäteriets e-tjänst Kartutskrift).
• Skyddad natur, Naturvårdsverket
  I kartverktyget Skyddad natur finns alla nationalparker, naturreservat och övriga skyddade områden. Även du som är friluftsintresserad kan ha glädje av kartverktyget.
• Länsstyrelsernas karttjänst, visar skyddad natur, leder och andordningar för friluftsliv, och dylikt.
• Vägtrafikflödeskartan, trafikdata från hela Sverige tillgängligt via Trafikverket. Inkluderar data m antal fordon, fordonstyper och dess hastigheter (även cykel i förekommande fall).
• NVDB karta - en applikation där du kan titta på vägdata som finns registrerade i nationella vägdatabasen.
• Vraklämningar och andra lämningar under ytan. Via dykarna.nu
• Detaljplaner Uppsala kommun
• Indelning av valdistrikt i Uppsala län
• Svenskt luftrum med TMA/TIA-zoner, enbart(?) för segelflyg
• Trädtäckning i städer och tätorter, via Boverkets nationella kartläggning av träd
• Svenska fiskeregler, via svenskafiskeregler.se
• FornPunkt - medborgarforskningsplattform i kartform om kulturlandskap och kulturlämningar. Med historiska kartor direkt ifrån Riksarkivet som kartlager.
• MSB:s karta över alla skyddsrum via https://old.reddit.com/r/sweden/comments/1gwl094/visste_ni_att_msb_har_en_karta_%C3%B6ver_alla

Other places

• Explore, search and download historical maps and spatial data on Palestine
• https://jurgen.gaeremyn.be/map.html - email servers of European municipalities. Via https://fosstodon.org/@tcarrez/114354060037774996

In this video, Derek Muller tries to find the correct answer to why bicycles are stable.

This little tool by Andrew Baumann is awesome for collating and working with highlights in PDF files.

It is a pip module, so easily installed, and works by producing Markdown (default) or JSON text file with the extracted annotations.

For example, to extract all annotations and highlight into a markdown file:

pdfannots -o annots.md iupac_gold_book.pdf

To Beautify, Validate, Minify, Analyse, Convert JSON, XML, JavaScript, CSS, HTML, Excel

For example, to render HTML directly.
Via "How to check a LinkedIn profile" by Lazybear.

En väldigt grundläggande kurs bestående av förinspelade lektioner av universitetslärare i ekonomi.

Kursen är uppdelad i fyra delar: grunder i finansiell kunskap, hur man köper ett hus, hur man sparar för sin pension och hur man investerar pengar på, till exempel, aktiemarknaden.

Via IT-pedagogen.

The libpoppler-utils package contains the tool pdfsig that does just this.

$ apt install libpoppler-utils
$ pdfsig file.pdf
Internal Error (0): couldn't find default Firefox Folder
Digital Signature Info of: file.pdf
Signature #1:
  - Signer Certificate Common Name: Donald Duck
  - Signer full Distinguished Name: C=SE,E=donald.duck@stackoverflow.com,O=Uppsala universitet,CN=Donald Duck
  - Signing Time: Oct 10 2021 15:12:20
  - Signing Hash Algorithm: SHA-256
  - Signature Type: adbe.pkcs7.detached
  - Signed Ranges: [0 - 132117], [137169 - 143786]
  - Total document signed
  - Signature Validation: Signature is Valid.
  - Certificate Validation: Certificate issuer is unknown.

The complaint about Firefox folder goes away if you simply create the empty folder ~/.mozilla/firefox.

• https://stackoverflow.com/questions/41301138/how-to-check-if-a-pdf-has-any-kind-of-digital-signature/67331180
• https://askubuntu.com/questions/226257/how-can-i-validate-a-pdfs-digital-signature-with-evince
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926404
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=924050

− Kan vi producera färg av koldioxid? Svaret är ett rungande ja! Det var beskedet från Anna Berggren hållbarhetschef, Perstorp, när hon beskrev företagets planer på att bygga en anläggning för att samla in koldioxid och tillverka metanol av den.

Inspelning från IKEM:s och Kemisamfundets seminarium om vad som förenar Perstorp och Mars-resor.

• Nils Hannerz, forsknings- och innovationschef IKEM.
• Anna Berggren, hållbarhetschef, Perstorp.
• Alexis Bohlin, forskare vid Luleå tekniska universitet.