Not sure about the enconding

Right click on video -> Stats for Nerds

If you’re forward thinking for future speed generations you definitely should go with singlemode fiber, by the way. Multimode is mostly done at 10Gbit/s as far as I know. There are some things like 40G and 100G SR4, over multimode but they use 4 fibers in each direction. Whereas I have personally installed 100G bidirectional lines already on singlemode over 10 km already, that’s easily commercially available (though it would be ridiculous for home use).

I think the price difference between 10G single mode and 10G multi mode gear has also decayed enough that taking the step up to singlemode is no big issue anymore.

Well I have never tried to deliberately break a fiber, usually my goal is to have them work when I’m done. But the bare fibers without mantle are really thin (250 micrometer is typical, 125 for core and cladding, and 125 around that for the coating) and you have to treat them carefully. I think if you bent them tight they would break. I know splicing tools have special cutters included, but my understanding was that those are only needed to make a proper 90° cut good for splicing.

It’s been a while but in this very comm someone posted pictures of a quadcopter drone with a 41.4 km drum. I’ll try to dig it up.

Here’s one https://sopuli.xyz/post/21919901, it was a hexacopter, not quad.

And in my search I also came across these links:

• https://en.defence-ua.com/industries/ukrainians_made_an_fpv_with_fiber_optic_cord_stretching_for_41_km-13327.html

• https://defensefeeds.com/analysis/how-do-fiber-optic-drones-work/

And finally here is even a demo video:

• https://sopuli.xyz/post/18922497

It seems fiber works fine even on manoeuvrable drones.

A friend at work has started experimenting with 10G LAN at home and at that speed one interesting observation is that the copper interfaces use significantly more power, like 8W vs 1W for an optical one or something like that. But it’s only really worth it if you have a significant portion of end devices that have SPF+ slots directly, with the converters you get the worst of both worlds really. Except for range.

Oh dang, here’s a screenshot at least:

Cabled G657.A1 fibers with a LSZH mantle is going to be more expensive compared to this bare fiber G652.D of course, but yeah there are people who start using it at home. The main issue is finding end devices with SFP slots, so you don’t have to convert between optical and electrical all over the house.

Not that expensive, probably under 10 USD for 10 km, given that I can find offers like below in a few minutes on Aliexpress

https://aliexpress.com/item/1005008412846430.html

There is no way these bare fibers have the tensile strength necessary that you even could drag kilometers of it back to the operator through the terrain. You need to know, these are not full cables as you would normally use them for networking, that would be to heavy for the drone. Instead it’s single fiber strands without any mantle.

Are the drones actually dragging around cable?

Not quite, they spool them off from the drone as they go, so they don’t have to deal with any drag across the ground.

This can’t be glass, right? Plastic?

As far as I know they are using standard telecom fiber, so it’s silica glass, partially doped to make the refractive index between core and cladding different

It’s either exactly the same, or it’s gracefully degraded. You’re asking for two opposite things at once.

For what it’s worth I support the notion that fundamental functionality should be supported without Javascript, with good old form submissions.

But I also recognise that you can’t get the exact same behaviour without javascript initiated background GETs and POSTs. Easy example: A scrollable map that streams in chunks as you move it.

OP really muddled the waters by writing:

exactly as it does with javascript turned on

That’s obviously impossible and wouldn’t be degraded.

If I had to guess the optimum would be around 26. Not too much younger, and looks not too much older. Good luck haha.

Did you misread? They wrote “the only reason left to boot from a DVD”, so the use case you replied with has nothing to do with the topic.

The dectector and the variable field (that induces the localized measurable changes) stop between scans, but the static magnetic field is kept up.

As long as you keep up the superconductitvity there is basically no electrical loss in the coils. Dialing the magnetic field down would require pulling out the energy, and reinjecting new energy to get the field back up. That’s the slow part, because injecting current quickly would heat the coil above superconductivity, leading to a quench.

I’m not sure how energy is withdrawn in the ordinary shutdown procedure, but I expect it is exchanged into heat and vented to the outside air in some way, rather than reinjected into the grid in a usable form. (The latter would require an inverter to turn the DC back into AC synchronized to the grid, probably would increase complexity by too much). So I suspect it would be wasteful too.

Yeah I considered the supercooled electromagnert couldn’t possibly rotate, but I wasn’t sure if it could be modulated to change field directions or something. Didn’t seem very likely. Thanks for the confirmation.

Even that article fails to mention if and when the magnet was quenched.

I remember that one. The cop was stupid enough to get his gun snatched, and then he was stupid enough to quench the MRI for that!

Here’s the docket for the resulting court case. In their response this year the LAPD seem to have summarily denied everything.

https://www.courtlistener.com/docket/69172475/noho-diagnostic-center-inc-v-city-of-los-angeles/

Unless something gets stuck. Then it is shut down and restarted after the thing is removed. Takes hourse though, I think the startup was four hours.

They had that happen at the hospital my father worked at, the cleaning lady brought in a stool with steel legs. They tried to remove it by force first, but four men could not do it.

The detector spins around the patient, but does the magnetic field spin too? I though not, but I’m not that certain.

all they needed was a magnet of equal or greater strength

MRI magnets are electromagnets that are supercooled with liquid helium and take hours to start or stop because of the electrical energy that has to be put in or taken out.

So just having a magnet of equal strengh for idiot defense would be a very significant waste of electricity and helium unfortunately