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Note to self: More proof reading before tooting.

Can we stop pretending that any free software alternative have to be like or "better" than Facebook, Twitter, Youtube, …?

People don't use any of these services because they are great apps, they use them due to the content. Same will be with the fediverse. If the content is great for them, people will stay around, if it isn't they'll leave.

Mhm, just though, shouldn't a smart watch be particularly good at keeping the time, given it's a watch.

Then I threw this idea away, I don't think time is the main concern of smart watches, they probably just use the same hardware as a smartphone to keep the time, which is sufficient enough for humans.

(I somehow came up with the idea, of using a smartwatch as an NTP server, because… you know… it's a watch. What a silly idea indeed.)

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Longposting. Things you probably don't realize about USB things and power banks until you measure them. 

You know how #USB is typically 5V, while #lithium cells are usually 3.7V? No? Well, now you know now.

Anyway, most devices charging their internal lithium cells from USB, whether they be #PowerBanks, phones, or other devices, will simply dissipate the "overvoltage" away.

While the measured milliamperes will stay the same, this costs power. To be precise, it puts an upper limit on charging efficiency of 74%. That won't be the actual efficiency, just the highest it could ever be, in theory, if there were no other losses anywhere.

Now if you were to charge your phone from a power bank, that power bank has to turn 3.7 volts into 5 volts again. This is done with a so-called "boost" converter, and to be able to make 5 volts from 3.7, it has to sacrifice some milliamperes.

This means you won't ever get back the milliamps you put in, not even in theory. You'll only see 74% of them back. This is fine however, because due to the 35% increase in voltage, the total power stays the same.

But! Your phone will simply dissipate that difference between 3.7 and 5 volts away again, so all the power bank's hard work has been for nothing.

This means if you charge your phone via a power bank, your phone's battery will only receive about 55% of the energy you originally put into the power bank. Again, that's not the real efficiency, that's the highest it could possibly be, in theory.

All of this changes with USB-PD, which is a new USB standard in which two devices can negotiate a voltage between 5V and 20V among themselves. Devices supporting this standard tend to do proper conversion, but even that's not all it's cracked up to be, and also a story for another time.

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Entgegen des verbreiteten Wunschdenkens, dass "Multi-Cloud"-Strategien einen Vendor-Lock-In-Effekt vermeiden, behaupte ich mal, dass man anschließend einfach nur bei mehreren Cloud-Anbietern im Vendor-Lock-In steckt.

Vorallem dann, wenn man mehr nutzt als "nur VMs".

(Obviously you can make that problem as complex as you like by considering losses due to mixing water/which you usually use to adjust your shower temperature, losses from transporting water through the house, different shower modes which might use different amounts of water, …)

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This should boil down to a simple math problem that can be solved by a graph.

You know how much energy is needed to heat a litre of water by one degree, the efficiency of your heating element/system and the amount of water that flows through your showerhead.

🤔💡 Maybe I'll do some checks and measurements tonight to figure out at which point it's better to shower quicker vs cooler.

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Shower thought: Does reducing the shower temperature by 1-2°C really save energy, when it results in a longer overall shower time due to trying to hit that lower temperature?

Can we stop declaring something free, when you actually need to give away your email address, name and company name? This is not free, this is conditional. Thanks.

Sheogorath boosted

@sheogorath
oh lord. Barely 10 hours of fiddling later, and I solved it.
Turns out that in order to properly chroot into the system, one now has to mount a really random directory /sys/firmware/efi/efivars.
It's not documented *anywhere* (that I could find) other than this non-accepted stackoverflow answer
unix.stackexchange.com/a/41891
Not specific to Ubuntu or KDE Neon even, this was from some people trying to install Arch.

Given the current situation around Lenovo firmware, it's a good time to run:

fwupdmgr refresh
fwupdmgr update

If you didn't already update using "GNOME Software" or alike.

fwupd.org/

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Immer wenn du denkst, was du machst ist sinnlos, denk dran, dass die Firma NERO noch existiert und ständig neue Versionen von ihrem Brennprogramm veröffentlicht…

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Hint: Set up a 30 min appointment once every 3 months to revisit your app permissions. It sounds silly, but it's worth the time investment.

Remove apps you no longer use, drop permissions from apps you only seldom use and check if maybe new features are available, such as "Only while use" permissions.

It really helps to keep things drastically more private.

Anyone strong opinions/good comparisons regarding and its cryptography?

Sheogorath boosted

Kenn’ ich Leute, die Bock auf nen #Senior #WebDev-Job im Bereich Schulsoftware haben? #DotNet und #JavaScript, #Leipzig und/oder #remote, Festanstellung.

Ein Bekannter von mir arbeitet da, wirkt zufrieden, und die Bude sucht „händeringend“. Wenn ihr irgendwelche Fragen habt, schreibt mir gerne, ich versuch sie dann zu beantworten oder stelle nen Kontakt her.

all4schools.de/job/senior-anwe :boost_ok:

The only reason I can't just right out block all E-Mails with gmail addresses are mailinglists :|

Today I revisited this wonderful guide, while setting up a new backup : github.com/drduh/YubiKey-Guide

It's still one of the best Yubikey for guides out there.

My typical "Why is this broken all of the sudden?" causes:

- disk space
- IOPS
- MTU

Recently it's always one of them.

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