Your numbers seem reasonable — more intuitive for me to work in terms of pressure. Atmosphere is (roughly) 1e3 Torr, good UHV can be around 1e-10, so that’s 13 orders of magnitude, which is (roughly) the same difference that you calculated.

Aluminum foil is very common in physics labs. And a main use for it is “baking”! To get ultra high vacuum (UHV)* you generally need to “bake out” your chamber while you pump down. Foil is used same as with baking food — keep the heat in and evenly distributed on the chamber.

Sadly, it’s usually not food grade aluminum foil, as that can contain oils, and oils and vacuum are generally a big no-no.

*Just how good is UHV? Roughly: I live in San Francisco, which is ~7 miles by ~7 miles (~11km). Imagine you raise that by another 7 miles to make a cube. Now, evacuate every last molecule of gas out of it. Now take a family sedan’s trunk, fill it with 1 atmosphere of gas, and release that into the 7 mile cube. That’s roughly UHV pressure.

From TFA:

“I have failed you completely and catastrophically,” Gemini CLI output stated. “My review of the commands confirms my gross incompetence.”

ASCII wasn’t around then, so it would perhaps be stored in 5-bit ITA2, or 6/7-bit FIELDATA. So likely a 5/8 to 7/8 space savings (unless the numbers are for compressed War and Peace).

No, I’ve been a strict vegetarian for a long time, mostly vegan now but not strict about it. I did eat fish a few years ago because it was an invasive species (and also, delicious).

But also, I have no problem getting the food/nutrients I need from a plant based diet, which isn’t always easy for other folks.

Thanks for the thoughtful response! 1) makes a lot of sense, and 2) makes a lot of “emotional sense” to me (as opposed to “intellectual sense,” I guess).

What’s the conventional wisdom as to why this is so bad, but eating meat basically gets a pass? Like, meat offers sustenance, yes, but it’s by no means required. So basically, humans eat meat because it tastes really good — it’s great “culinary entertainment.”

This is a different kind of entertainment, but it’s deeply offensive to many folks. I’m not trying to be a dick about it, just curious why this is seen as such a sin.

Is it that these animals weren’t “supposed” to be killed? Would a movie about a beef cow who ends up getting slaughtered, both onscreen and IRL, be seen as better? Worse?

Yep, you’re right — I was just responding to parent’s comment about fiber being best because nothing is faster than light :)

Can you explain the Ethernet requirement more? Was that just that the computer didn’t have WiFi, or was it set up such that only the wired interface worked with their VPN, or…?

Can you explain your travel router situation? Did you use the travel router to access WiFi and provide an Ethernet port for the computer (I think this is called “WISP mode”)? Or was this an 4G/5G router?

In any event, at least on Android you can connect to WiFi and tether to a computer over USB. It’s very useful for setting up a computer without WiFi drivers, as Linux will almost always recognize the shared Internet (so, it’s functionally a USB wifi dongle with very good driver support).

That’s…not really a cogent argument.

Satellites connect to ground using radio/microwave (or even laser), all of which are electromagnetic radiation and travel at the speed of light (in vacuum).

Light in a fiber travels much more slowly than in vacuum — light in fiber travels at around 67% the speed of light in vacuum (depends on the fiber). In contrast, signals through cat7 twisted pair (Ethernet) can be north of 75%, and coaxial cable can be north of 80% (even higher for air dielectric). Note that these are all carrying electromagnetic waves, they’re just a) not in free space and b) generally not optical frequency, so we don’t call them light, but they are still governed by the same equations and limitations.

If you want to get signals from point A to point B fastest (lowest latency), you don’t use fiber, you probably use microwaves: https://arstechnica.com/information-technology/2016/11/private-microwave-networks-financial-hft/

Finally, the reason fiber is so good is complicated, but has to do with the fact that “physics bandwidth” tends to care about fractional bandwidth (“delta frequency divided by frequency”), whereas “information bandwidth” cares about absolute bandwidth (“delta frequency”), all else being equal (looking at you, SNR). Fiber uses optical frequencies, which can be hundreds of THz — so a tiny fractional bandwidth is a huge absolute bandwidth.

80% of the USA lives within urban areas (source). Urban “fiberization” is absolutely within reach.

Agree that running fiber out to very remote areas is tricky, but even then it’s probably not prohibitive for all but the most remote locations.

So the irony is

I see what you did there…

I think you mean more scrupulous, not less.

It is really powerful per watt, and has a built-in UPS. Any homelab type things you could do with that? macOS+homebrew will give you a nice *NIX feel, very familiar if you’re a Linux user.

I’m a fan of having a remote homelab computer+disk for off-site storage. This would be a good candidate in that it wouldn’t use excessive power at a friend/family’s place, but may be overkill (I use a pi3 for that).

That’s what I heard about Chevy’s, too.

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Hobby 1: Ballroom dancing

No I’m pretty sure Strictly Ballroom is a completely accurate portrayal of ballroom dancing.

From our experience in the US, the birth is nothing compared to the financial drain of the other expenses. And at this age, childcare dwarfs all the other child-related expenses.

We have great insurance and don’t rely on family for childcare though, so the math is very very different for someone with “free” familial childcare and no/lousy insurance…

Others mentioned virtualization — I have had issues with COW filesystems (btrfs), as COW does not always play nicely with VM drives (extreme fragmentation and very poor performance).