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Oxygen (O2) wants two more electrons, so normally shares them with a partner using two covalent bonds: O=O

I'd always assumed ozone (O3) formed a single bond with each neighbour in a loop. Two bonds each, simple.

But no! There's no loop, and it switches between O-O=O and O=O-O like a maniac, with essentially 1.5 bonds each!? What!?

en.m.wikipedia.org/wiki/Ozone

h2g2bob boosted
h2g2bob boosted

Ran into a neat app on F-Droid that makes it super easy to add data to OpenStreetMap wherever you go, called StreetComplete. Pull up the app, and it asks you simple questions about the features around you. Answer it, and it pushes the edit to OSM automatically via your user account. Wonderful!

#openstreetmap

streetcomplete.app
@streetcomplete

h2g2bob boosted

Built a map, wrote a report! 📰 publicinterestnews.org.uk/map

🏜️ 4.1m people in the UK in news deserts
🐪 Millions more in news 'drylands' with less than one news outlet per 100,000 residents
🎡 London appears particularly badly served

My laptop stops charging the battery at 6pm, so you can use the electricity to cook dinner dbatley.com/blog/2023/07/batte

ICANN isn't the only root DNS provider in town: OpenNIC provides top level domains (.geek, .null, …), mirrors new nation country codes (.ku, .uu, …), and mirrors the icann root (.com, .lidl, .softbank, …) opennic.org/

The end of time is now only 15 years away - but thankfully Debian has started planning for the 2038 problem and how to switch everything from 32-bit time to 64-bit time. As always, an excellent article from @LWN lwn.net/SubscriberLink/938149/

h2g2bob boosted

Let’s ban the advertising of SUVs as an easy first step then let’s start working on regulating them out of existence. The emissions and child deaths are unacceptable and these aren’t the handy farm vehicles people pretend.

Step 1) sign this petition.

petition.parliament.uk/petitio

h2g2bob boosted

DELIGHTED to see the BMJ @bmj_latest saying today that they will require papers to share their code.
bmj.com/content/382/bmj.p1609

HUGE milestone for reproducibility, quality, and efficiency.

Here's our BMJ editorial on why code sharing matters, from 2019:

bmj.com/content/367/bmj.l6365?

h2g2bob boosted

Dug out this late-90s-vintage Brother GeoBook from my work archive, after reading oldvcr.blogspot.com/2023/06/o-

We (at STNC) wrote the IP stack and web browser libraries (maybe email too?).

There's only the tiniest bit, if any, of my code on this - I did a few weeks on it when I started at STNC but then switched to the Psion Series 5 web browser.

#Brother #GeoBook #STNC #retrocomputing

h2g2bob boosted

The tories want to close almost every railway ticket office in England.

Here’s @JenOnTheMove and friends laying down why it will absolutely wreck our railways, and why its about much more than just tickets. 😡

youtu.be/uZwcZ9EjZpQ

h2g2bob boosted

Our IdenTrust cross-sign is set to expire on September 30 of next year. This will affect any Android devices still running old versions of the OS (currently 7.5% of all). Learn more in our blog post: letsencrypt.org/2023/07/10/cro

h2g2bob boosted

- Will you print these three pages for me?
> I cannot. For there has been An Error.
- Oh no, what was it?
> An Error.
- Can you accept a new print order for the three pages?
> Of course! I will get to that after the job that's already pending.
- Please delete that first job?
> It is important that you want to delete it, but it is more important that it has An Error, so no.
- What if I shut my computer all the way off and come back tomorrow?
> Oh! In that case you may have all six pages.

My phone runs e.os, which is without the apps. It works well - it comes with useful, interesting apps like MagicMaps, and provides access to FDroid and/or the Play store. e.foundation/e-os/

h2g2bob boosted

I've made a thing that helps you to make a printable template for a hexaflexagon, with your choice of pictures on each of the three faces: somethingorotherwhatever.com/h

You can take a photo with your camera, or upload a file.

#hexaflexagon #math #RecreationalMath

h2g2bob boosted

A scheme that I would look at if I didn’t already have a bike is Cycling UK’s “Making cycling e-asier”. They're providing free month-long e-bike loans in different parts of the country (inc Manchester). e-bikes are a real game changer when it comes to getting people into cycling and can replace a lot of car journeys.

cyclinguk.org/making-cycling-e

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h2g2bob boosted

I've shared this before but it's been a while and probably was on twitter, so it's worth a re-share

A lot of people don't know that `diff` (and `git diff`) have a several algorithms to choose from

They have various tradeoffs, mostly around performance vs readability & semantic accuracy vs overall diff size

For manual/visual diffing, I generally prefer 'histogram’, as it tends to be a closer representation of what *actually changed*

Here's a nice writeup

luppeng.wordpress.com/2020/10/

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