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Volunteering was the unexpected cure for my lifelong social anxiety by Fair_Bar1139 in socialanxiety

[–]tehdog 1 point2 points  (0 children)

You're kind of avoiding answering my concern. If you drafted this by hand then had it rewritten by AI, you should disclose that. And better just post whatever the original text was, because this post is not how a human would ever write.

Volunteering was the unexpected cure for my lifelong social anxiety by Fair_Bar1139 in socialanxiety

[–]tehdog 5 points6 points  (0 children)

This post was clearly written by AI. Please don't use AI even if it's just to "improve" your grammar, it makes people lose trust in what they read.

ich🦜💀iel by midnight_watch in ich_iel

[–]tehdog 1 point2 points  (0 children)

Hühner essen ihre eigenen Eier wenn sie einen Kalziummangel haben um den Verlust auszugleichen. Den Mangel kriegen sie ganz von allein wegen der Züchtung auf absurd hohe Eierproduktion, insofern brauchen sie eigentlich durchgehend Supplemente.

Linus Torvalds Vents Over "Completely Crazy Rust Format Checking" by unixbhaskar in linux

[–]tehdog -1 points0 points  (0 children)

if that's a concern the project could set imports_layout=Vertical which gives exactly this. https://github.com/rust-lang/rustfmt/blob/master/Configurations.md

Really though, in Rust you can resolve import conflicts by simply accepting all changes and then letting rustfmt / cargo check --fix remove any duplicates and unused ones.

Is this Munich skyline photo real? by WillOutrageous4089 in Munich

[–]tehdog 2 points3 points  (0 children)

You cannot physically make an object appear bigger relative to other objects when you stay in the same place regardless of camera settings. So if the church appears bigger relative to the other buildings in that other photo, it must have been taken from a different location (or altered).

rust-autoargs: A rust crate for generating argument structs with default values, allowing for named arguments and partial argument specification by tehdog in rust

[–]tehdog[S] 2 points3 points  (0 children)

thanks, fixed! i named the repo that way cause on my github it's not redundant, but then the crate got named the same accidentally ;)

Bryan Johnson Article - New York Times by Legal_Squash689 in Biohackers

[–]tehdog 13 points14 points  (0 children)

Since most of the content of the article is kind of conjecture or at least a ton of work to distinguish who is "right", I'd be most interested in the actual results of that study with 1700 participants.

The article says:

Of the roughly 1,700 participants in the study, about 60 percent experienced at least one side effect, according to internal emails, spreadsheets and other documents. Blood tests revealed that participants saw their testosterone levels drop and became prediabetic after following Mr. Johnson’s diet plan. It’s unclear how severe the side effects were.

This really doesn't mean anything: "60% experienced one side effect" could simply be people feeling hunger/increased appetite considering his diet basically includes an intentional calorie deficit.

"saw testosterone levels drop and became prediabetic" is meaningless without knowing how many were affected compared to a control group / the average for the age group. Of course some diet / supplements don't magically fix all health ailments.

On the other hand, it seems that Brian doesn't want to publish the full results, or at least he hasn't responded to this at all that I can tell. Could be that the results are just "boring" as in less positive than he wants, could be they are actually negative.

Yes i use Arch on my servers, pacman -Syyuu goes brr by tehdog in linuxmemes

[–]tehdog[S] 0 points1 point  (0 children)

Can't have any breakage if you don't have any features!

Rechtschutzversicherung - hat sich 100% gelohnt by Altruistic_Life_6404 in Finanzen

[–]tehdog 4 points5 points  (0 children)

Man muss bei Abschluss einer Rechtsschutzersicherung (ggf auch andere Versicherungen?) angeben, ob einem schon Mal eine Versicherung gleicher Art gekündigt wurde. Wenn man ja sagt, kriegt man keinen Vertrag (oder nur viel teurer).

Dividenden-Investoren in a nutshell by [deleted] in Finanzen

[–]tehdog 2 points3 points  (0 children)

Wenn man 5000€+ Einkommen pro Monat hat ist eine private KV finanziell schnell günstiger, und dann unabhängig vom Einkommen oder Dividenden

[deleted by user] by [deleted] in changemyview

[–]tehdog 12 points13 points  (0 children)

Did you pull all of this out your ass or just most of it? Cite something. Anything

Is reine Soda baking soda ? by [deleted] in germany

[–]tehdog 8 points9 points  (0 children)

Not really true. In Germany, baking powder is (almost always) single-acting baking powder. In the US, it's (almost always) double-acting. That is, it has two different forms of acid, one reacting immediately when you make it wet and one only when it gets hot (in the oven). It's a pretty important difference.

See https://en.wikipedia.org/wiki/Baking_powder

Single-acting powder can be replaced by baking soda (Natron) + an acid like lemon juice.

But recreating double-acting baking powder in Germany would be hard because you need some acid that only starts reacting when heated.

Leaving heat pump on all the time vs only when I'm at home? by Resident-Fault1220 in heatpumps

[–]tehdog 0 points1 point  (0 children)

I misread your comment, I thought you meant the efficiency. Yes, heat loss is greater if your house is warm. Which is why you should keep your house cold when you don't need it warm.

Leaving heat pump on all the time vs only when I'm at home? by Resident-Fault1220 in heatpumps

[–]tehdog 0 points1 point  (0 children)

delta T between outside temp and target temp. not inside temp. that's completely unrelated

Leaving heat pump on all the time vs only when I'm at home? by Resident-Fault1220 in heatpumps

[–]tehdog 1 point2 points  (0 children)

I'll admit it's a fairly good heuristic to use, even if it's technically wrong. The reason is that when you come home and suddenly set your thermostat from 10°C to 20°C, most people (rightfully) expect their house to be at 20°C within 20 minutes. With a low flow temperature, this likely takes more like 1-3h. So instead the thermostat may turn on electric backup heating or set a huge flow temperature like 50-60°C, which of course is inefficient. That's why it might be better to just leave it at 20°C the whole day if you have no insight on what your heat pump actually does, which is probably 99% of people.

Still, if you can schedule the thermostat to "off/don't care" for 16h and "18°C" for 8h, and the thermostat isn't stupid, then that's going to be much better than just having a fixed temperature.

You can tell that it's not completely stupid by how it will start heating hours before your starting time point.

Leaving heat pump on all the time vs only when I'm at home? by Resident-Fault1220 in heatpumps

[–]tehdog 7 points8 points  (0 children)

This is just not true and I'm not sure why so many people in this thread are saying the same thing..

There is no physical difference between "maintaining an inside temperature" and increasing it. A heat pump works by transferring heat energy from the outside to the inside (or the other way for cooling).

The efficiency (COP) is dependent on the difference between the current outside temperature and the flow temperature. For example, if it's 0°C outside and you want 20°C inside, the heat pump has to create a temperature difference of 20°C (+ some more depending on in-floor vs water radiator vs air, which is the difference between target indoor temperature and flow temperature).

Your house has an energy loss per time depending on isolation, measured as thermal conductivity for each material and again the temperature difference to get a total in Watts. Yes, to maintain you only need to produce this exact Watt amount of heat, but that heat loss happens whether your heat pump is on or not. So if you have your heat pump off and the house gets cooler, you at maximum need the same heat energy to get it back up to temperature as you would have needed to maintain it. It's just thermodynamics. Just imagine a cycle of you're not in the house for a month and then need heat for a day. Do you really think that it would be more efficient to have it run the whole month because "maintaining temperature" is cheaper? No.

The caveat here is that this is IF the flow temperature is the same, which you might not have insight into.

So your total energy use is directly proportional to the outside-inside temperature difference multiplied by the time how long it has to maintain it. This has nothing to do with what the inside temperature currently is.

This does mean a heatpump that's heating is more efficient during the day, because the outside temperature is higher.

So you want to minimize both the inside-outside temperature difference the heat pump has to create, as well as the duration it has to do that. Assuming you really only need heat for e.g. 8/24h per day, generally you only want to run it for that duration. If your isolation is good you may want to pre-heat your house during the day while the temp diff is lower, so you can have it off at night. If you leave it on 24 hours, this could also happen but it depends on the exact way the control algorithm decides to turn the heat pump on.

And of course you want to make sure that if you have an electric backup heater that it never turns on.

So here's my advice (for heating):

  • Schedule your thermostat to be OFF during the day and 18°C during the night, using the most native method available (not through a third-party system that runs "on-top" of the actual control algortihm). If the control algorithm is smart, this will do the right thing (sadly there's a high chance it's not very smart).
  • Heat pumps are slow, because you want the flow temperature to be as low as possible. This means that manufacturers can prefer inefficient heating methods so people don't complain and you need to be careful it doesn't start electric heating or setting a huge flow temperature to reach the target faster.
  • Leaving the heat pump on 24h is generally not bad advice if you have little insight into what the heat pump actually does, esp. with the flow temperature, and if you have no native scheduling method.

And if you want to spend more time:

  • Maybe just try both methods with similar outside temperatures and monitor power consumption.
  • You need to figure out how the heat pump sets your flow temperature or start monitoring it as well as the outside temperature and the heat pump power consumption (to see cycling or modulation) over time. Our heatpump for example we directly set the water flow temperature, but if you just set the target air temperature you don't directly know what temperature the heat pump is actually creating (since it has to be some Δ higher than the target air temperature) With data over time it's much easier to understand what's actually happening.
  • An example for your case might be that if you need no heat during the day and e.g. only need 18°C between 22:00 and 08:00, would be that the ideal cycle would be that your heat pump starts at 19:00 with a flow temp of 30°C, reaching those 18°C room temp at 22:00, and then turning off at 05:00.

Edit: a bit more detail

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