bewaretheirs

Bain and Landau previously worked together in Mission: Impossible (seasons 1-3).

> T-Mobile US consumer subscriptions are IPv6 only already now.

I'm a T-Mobile US customer. This is correct - the only real address your phone gets is IPv6. I believe V4-only sites are reachable using 464XLAT (RFC6877, RFC7335) or equivalent.

Coming in a bit late, I'm surprised I haven't seen anyone mention that if you run your own recursive dns server you can now have it download a copy of the DNS root zone (following RFC8806) if you are so inclined.

See https://localroot.isi.edu/about/ for one site that will let you register to receive a DNS Notify when the root zone changes.

HTTP/2 multiplexing occurs inside the TLS boundary - there isn't a separate TLS stream for each sub-request. To demultiplex the requests you have to decrypt them first.

Not any more. SQLite received support for RIGHT and FULL OUTER joins in 3.39.0, released over a year ago.

Indeed. Slapping a coat of beige paint over the graffiti has got to be easier than moving them.

> The economies of scale make it easier for a city or county to maintain machinery for paving roads and making sidewalks

Generally that equipment is useful for more than just paving roads and is owned by private contractors in the US - the same contractors could be hired by county, city, or neighborhood.

IEEE standard floating point uses a binary mantissa.

And binary has trouble representing fractions that are common in prices:

  $ bc
  obase=2
  scale=20
  1/5

1/5 in binary is a repeating binary fraction: 0.0011001100110011...

Just as you can't express 1/3 or 1/7 precisely as a non-repeating decimal fraction, you can't express 1/5 and 1/10 as a non-repeating binary fraction. As a result, most prices involving cents in currency cannot be expressed precisely as binary floating point numbers.

edit: fixed formatting

But in those cases you're missing the pawn that was promoted, so the location of the second dark-square bishop would be encoded in a 6-bit pawn slot rather than a 5-bit or base-33 bishop slot.

Bishops move on the diagonal and so can only stay on squares of their original color; you could thus encode the positions of the 4 bishops with 5 bits each instead of 6 each, saving a total of 4 bits, but this would preclude the use of the "store our/their king's location" hack to encode things. But you can encode bishop positions as a 4-digit base-33 number (digits 0..31 indicate the square, digit 32 is captured), which can be stored in binary as a 21-bit number. Net savings ~3 bits.

The "no two pieces on the same square" constraint could similarly be used more aggressively.

Indeed. I've worked for several and my recollection is that cautions around both what you do and how you talk about things that may be sensitive to regulators (like antitrust, export controls, etc.,) were present in the annual mandatory business conduct training at all of them.

(edit: fix grammar nit)

SpaceX had to rework the business end of the deluge systems at LC39A and likely also at the other pads when they were rebuilt to launch the Falcon 9 / Falcon Heavy.

Rockets are not LEGO.

You can't just swap engines without a significant redesign of the rocket and ground support equipment to match.

the RS-25 burns liquid hydrogen and liquid oxygen; the BE-4 and Raptor burn methane and liquid oxygen, but the Raptor uses supercooled densified propellants while the BE4 takes them at closer to their boiling point. Switching between BE-4 and Raptor would require nearly as much work as a switch from RS-25 to either.

The varying density, temperature, and fuel-to-oxidizer ratios mean the propellant tanks would need to change size, and that may have some tricky structural implications with respect to the side boosters of the SLS. And the ground support equipment (launch pad, tower, etc., ) would of course also need to be adjusted to match.

In case anyone is wondering, volume five is "forthcoming":

See: https://geography.wisc.edu/histcart/

and: https://geography.wisc.edu/histcart/volume-5-cartography-in-...

Only volume 1 came out in 1987; volume 2 was published in three books from 1992 to 1998; volume 3 came out in 2007, 6 in 2015, 4 in 2019.

academic publishing allows for out-of-order execution.

> If a producer goes out of business they should be forced to give out a signed firmware that disables the key checking, then they must put up their source code for any users who wish to build and flash it themselves.

Requiring an organization to do even a small amount of engineering as it is going under is simply not going to work in practice.

IMHO the only possible way for something like this to work is to require vendors to upload buildable firmware source into a third-party escrow system before you can ship devices to customers.

There's also the International Earth Rotation Service, but they're depending on inertia to get their job done.

(Their actual job is to coordinate very precise measurements of the earth's rotation to determine how its rotation is shifting relative to atomic time).

The contrary belief was once mocked on "Yes, Prime Minister" as:

"1. We must do something.

2. This is something.

3. Therefore, we must do this."

> They probably do have exits though, in case another elevator breaks down.

Floor space is generally too precious for that. In a typical multi-bank elevator setup, lower floors get their toilets or other utility spaces placed between two banks of elevators that don't stop at that floor; the corresponding point in the upper floors is the elevator lobby for an upper-floor elevator bank.

There's a widely reported story that a group of people stuck in an elevator in the WTC on 9/11/2001 used a window washer's squeegee to cut their way through multiple layers of drywall to escape into a 50th floor bathroom.

Either way it could be caused by failure to detect the emergency vehicle in time.

NHTSA is investigating whether Tesla's "autopilot" system has trouble detecting emergency vehicles with their lights flashing (and thus is more likely to hit them). Cruise might have a similar perception problem.

See for instance:

https://static.nhtsa.gov/odi/inv/2021/INOA-PE21020-1893.PDF

"Since January 2018, the Office of Defects Investigation (ODI) has identified eleven crashes in which Tesla models of various configurations have encountered first responder scenes and subsequently struck one or more vehicles involved with those scenes. The incidents are listed at the end of this summary by date, city, and state."

"Most incidents took place after dark and the crash scenes encountered included scene control measures such as first responder vehicle lights, flares, an illuminated arrow board, and road cones. The involved subject vehicles were all confirmed to have been engaged in either Autopilot or Traffic Aware Cruise Control during the approach to the crashes. "

Any large corporation likely has more individual shareholders than that (particularly when you include indirect ownership via mutual funds).

The copyright holder gets a share of ownership in any AI model derived from its work, and thus a share of any resulting revenue.

Except that in the Farscape segment of Stargate's "200", Michael Shanks played John Crichton while Browder played Stark:

https://www.youtube.com/watch?v=UCNDdlCo4rA

They attacked the firmware of customer terminals on the ground via a management network, not the satellites themselves.

See, among others:

https://www.viasat.com/about/newsroom/blog/ka-sat-network-cy...

https://www.reversemode.com/2022/03/viasat-incident-from-spe...

The terminal firmware had a bunch of security vulnerabilities allowing injection of arbitrary executables and commands without adequate signature verification.

The attack bricked the terminals requiring a hardware swap to restore service.

The theoretical papers I've seen (linked here in recent days) suggest that pure crystals of LK-99 would superconduct only in one dimension so it's likely to be fussier than that.

Perhaps it will be like a "tape" laid down with the proper orientation for each conductor. Perhaps you'll need separate north-south and east-west and maybe diagonal layers with special attention to inter-layer connections.

It would make more sense to ensure that any sensitive technology on board is in a demisable subunit that will melt during reentry, so nobody has a chance to snag it after it reenters.

This is also a safety consideration in satellite design - see, for instance: https://spectrum.ieee.org/spacex-claims-to-have-redesigned-i...

If the whole thing comes apart into tiny pieces, you have no chance that anyone/anything on the ground will be injured/damaged by falling debris..

The reentry tech in ICBMs has nothing to do with satellite disposal, and, in fact, would make satellite disposal more hazardous (because it would mean the satellite would reenter in one piece rather than breaking up into smaller pieces that are more likely to burn up/melt in the atmosphere).

An ICBM warhead reaches space but at suborbital speeds. It never reaches orbital velocity and will reenter no matter what; it has a heat shield so that the warhead remains intact when descending through the atmosphere.

For satellite disposal, the satellite starts off at orbital velocity and needs to be decelerated above the atmosphere to drop the low point in the orbit far enough that the atmosphere will decelerate it below orbital velocity.

https://what-if.xkcd.com/58/ has a good overview of the difference between suborbital and orbital velocity.

Superconductivity was first observed in solid mercury at a temperature of 4.19 Kelvin in 1911, not long after liquid helium was first produced in 1908.

The 1980's discoveries were of the first "high temperature" superconductors (where "high temperature" means "above the boiling point of liquid nitrogen").

Liquid nitrogen is much easier to deal with than liquid helium.

That should be

  even 0 = true
  even n = odd n-1

  odd 0 = false
  odd n = even n-1

I fed a C version of this (with unsigned n to keep the nasal daemons at bay) to clang and observed that it somehow manages to see through the mutual recursion, generating code that doesn't recurse or loop.

Unpopular opinion time:

A ML model is clearly a derivative work of its input.

Here's what I think would be fair:

Anyone who holds copyright in something used as part of a training corpus is owed a proportional share of the cash flow resulting from use of the resulting models. (Cash flow, not profits, because it's too easy to use accounting tricks to make profits disappear).

In the case of intermediaries (e.g., social media like reddit & twitter) those intermediaries could take a cut before passing it on to the original authors.

Obviously hellishly difficult to administer so it's unlikely to happen but I don't see a better answer.