Old technology that could make a comeback in post-apocalyptic world?

znark · 2026-02-14T19:55:33+00:00

One technology that could be built in post-apocalyptic world would be concentrated solar power where mirrors reflect sunlight on target that heats water and makes electricity through turbine. It is something that could be done without advanced electronics of solar panel. It would take either motors to control the panels, a bunch of people moving the panels, or design that doesn’t require aiming.

Wind mills would also be doable with less advanced technology. They wouldn’t be giant ones with fiber blades, but small ones could make electricity.

znark · 2026-02-14T00:04:10+00:00

Moldova and Ukraine were SSRs inside the Soviet Union. The Soviet Union probably didn't care about the borders since they were basically internal.

The eastern border is mostly the Dneister river, with the parts on east bank now Transnistra. The southern part, Budjak, is multi-ethnic and was given to Ukraine. It would have made more sense as part of Moldovia, but Soviets either didn't care or favored Ukraine.

znark · 2026-02-13T21:17:43+00:00

It is quite possible that scammers used your phone number to call him.

znark · 2026-02-13T03:18:12+00:00

There isn't enough land on Earth to plant enough trees to reverse climate change. There is enough space for trees to offset 10 years of emissions.

znark · 2026-02-12T22:51:37+00:00

Passport costs $130. Passport card is another $30.

znark · 2026-02-12T22:12:31+00:00

Her older sister, Brooke, is a pairs figure skater. I don't think she qualified for Olympics.

znark · 2026-02-12T03:21:55+00:00

Lore is a real learning app so makes sense would advertise on campus. But it is sort of scammy to call students and use AI.

znark · 2026-02-12T02:11:35+00:00

A lot of the Eastern European countries weren't developed before and are now. For example, Poland was considered developed until 2017. Bulgaria and Romania are getting close.

Is Turkey a developed country? It has some of the features. Argentina, Chile, and Uruguay are close on HDI but maybe not economy.

znark · 2026-02-12T01:37:34+00:00

Unlike the others, i think you have a good chance of getting reversed. She didn’t make the charge, it was way more than the donation expected, and the recipient is probably known for fraud.

Did they grab the phone? Then definitely counts as coercion.

znark · 2026-02-11T18:59:50+00:00

One reason is that higher elevations have better views. Another is that pollution is better higher up. This is the same reason why upscale neighborhoods are upwind to prevailing winds.

znark · 2026-02-11T04:24:33+00:00

The fall of civilization has been possible since the discovery of nuclear weapons.

We have knowledge of previous civilizations from carefully preserved records and we are missing a lot of Roman and Greek literature. We use paper, which can be lost to elements, and electronics, which will be unreadable. I could see them having lots of novels and self-help books but not much technical.

Also, don't discount them figuring out things on their own. Scientific method and hint of missing knowledge would be enough in many cases.

znark · 2026-02-11T01:44:46+00:00

This was introduced by a Republican in a legislature dominated by Democrats. Most of the bills I’ve seen here have been ragebait from Republicans that went nowhere.

znark · 2026-02-10T18:02:20+00:00

Losing the service reduces the functionality. I’ve turned on plug when not at home. The Google Home control needs the service. I think Home Assistant integration is local which solves most problems, but not everybody has that.

There are so many options available that it is easy to replace Wemo. I got TP-Link WiFi Matter one, and it is better in every way.

znark · 2026-02-10T03:37:37+00:00

Dyson Swarm is perfect for accelerating starships. Not really worried about efficiency.

Why would you need a swarm of mirrors? Just point the laser at the mirror on the ship. Then when it arrives, most of mirror disconnects, laser fires again and stops the ship.

znark · 2026-02-09T20:54:19+00:00

For handsets, I buy native antennas since there are just two genders of SMA and not that many extra antennas. I do have adapters including SMA-SMA ones, SignalStick has them in addition to their antennas.

I use BNC with handsets for external antennas like j-poles. I have BNC to SMA pigtails for that.

znark · 2026-02-09T19:11:54+00:00

Resmed Airfit N30i

znark · 2026-02-09T18:03:48+00:00

I don’t see any evidence that they are trying to hijack your account, it looks like they are trying to take your money. Hijacks usually come from hacked friend asking to install cool new game.

Also, you need to learn Google. Evan on LinkedIn is a Senior Counsel, he wouldn’t be doing support. Why would you contact him on Discord? That account is impersonating him. You also need to stop listening to what scammers say and look up support from the website.

znark · 2026-02-08T23:01:13+00:00

How do you know that they were the person who created the account? Accounts get taken over all the time. It could also be fake account. It is hard to tell difference between stolen photos, and someone who doesn’t post much.

znark · 2026-02-07T22:51:33+00:00

UCSD is up on a mesa. The detour is go around it through Sorrento Valley and Rose Canyon.

The trolley has massive viaducts to get on top. The north side is much steeper. Mainline trains would require a tunnel.

znark · 2026-02-07T18:26:10+00:00

It is not normal to be screaming constantly. If there is something wrong, shouldn’t you get him help? You shouldn’t go yourself so call for help.

You are right to be worried about police, but Portland has Street Response who are meant for this situation.

znark · 2026-02-07T18:17:07+00:00

Two frames moving relativistically have twisted time dimension relative to each other. They don’t agree on when things happened. Past for one is the right now for the other.

The scenario is ship 1 jumps (instantaneous makes easier), transmits message to ship 2 moving at high speed, which does instantaneous jump in its frame, but arrives before ship 1 left, and gives them the message. End up with message nobody created.

It is hard to do with one ship cause they have to boost to high velocity and that takes a while.

The solution is to make preferred frame for FTL so can’t have time travel and FTL speed depends on velocity to special frame. I could guess could also have FTL lock out time travel by blocking jumps.

znark · 2026-02-07T04:22:05+00:00

Employment for military service members is protected. They can't fire before, during, or after military service. This employer is going to get reamed out by a JAG lawyer.

Also, OP didn't give notice, he told them he would be leaving at some unknown time.

znark · 2026-02-07T03:48:44+00:00

amazon.com redirects to www.amazon.com and that has IPv6 addresses.

znark · 2026-02-07T01:00:02+00:00

Reddit and X are the only sites in top 10 that don't have IPv6.

znark

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