California itself produces a substantial amount of oil.
A mile off Interstate-5 in the southern Central Valley, and you can’t tell you’re not in Texas oil country. Santa Barbara regularly has oil leaks from the offshore production in the Channel Islands area, and Beverly Hills High School famously has a productive oil well on campus.
So the state isn’t going to literally run out of oil (though lack of imports could lead to shortages).
This also neatly explains why Boomers were able to have a good life with just a high school diploma. Wikipedia has a good chart, but the short version is that having a high school diploma in 1965 meant you were better educated than 50% of the labor force.
You can't become a licensed electrician without doing x hours of apprenticeship under licensed electrician. And each licensed electrician doesn't need more than one or two helpers at a time, so...
Hollywood is the same. Want to join SAG? You need to get cast in 5 SAG productions. Oh, but SAG productions only cast SAG actors? Oh well...
Meanwhile, all us nerds were trying to teach anyone interested how to write software. Look where that got us.
Yeah that’s what I meant. White collar jobs are 45% of all jobs, and they are much more than 45% of all work income because they pay better on average.
If AI really does come in and destroy all that no job is safe. Blue collar households don’t hire tradesman at anywhere near the rate that white collar households do.
In a major economic downturn like that new construction dries up. The commercial work will dry up to as all those white collar companies close their offices.
The end result is that existing tradesman will be fighting over a much smaller pie. Plus they’ll be dealing with competition from all the unemployed knowledge workers trying to change careers. In some states and some trades new entrants will be less of an issue, but most trades in most states aren’t supply restricted like the above poster’s electrician example.
My point is getting to the trades isn’t going to protect you from AI taking your job unless AI takes over a small percent of jobs and stops. I don’t actually think AI is going to take all that many jobs myself, but if I’m wrong we’re going to have to completely rework our economy.
> Finally, ULAs don’t and were never intended to replace link-local addresses, they serve a different purpose entirely.
Right, but ULAs are the correct answer here because the purpose they serve is exactly the one the article is trying to hack around with link-local addresses. Like most "IPv6 is hard" articles, the main issue with this one is the author simply refusing to learn how IPv6 works or follow best practices.
ULAs are not hard to set up. You just need one device to broadcast Router Advertisements with the "A" flag set and router priority 0. That device may be the same one hosting the service!
> Also what gives you the impression that zones were “deemed a mistake”?
I disagree that zones are a mistake, but a good rule of thumb is that if you're trying to use zones and you're not writing system code, you're probably holding it wrong. Use IPv6 the right way and your life will be so much easier.
> Having services be accessible on a link-local address and then advertising that service via mDNS is a completely legitimate use-case that works extremely well and is extremely common with Apple devices amongst others.
Apple devices actually advertise services to hostnames via mDNS. Hostnames are then resolved to IP addresses, again via mDNS. While link-local address are populated in the host table, so are the routable addresses as well as the ULA-prefixed addresses (if your network uses ULAs).
Note you can also advertise a ULA prefix without the A flag. The advertisement tells other machines that the IP is on-link, and they can use their own GUA addresses to connect without needing a ULA address of their own.
You could also assign a single address (e.g. fd53::1/128) and advertise the corresponding prefix of fd53::1/128, so you don't even need a whole ULA prefix, just individual addresses. (This is sometimes useful if you use a router you can't configure and it's advertising a DNS server you don't want to use.)
You do generally need a tuned filter before the rectification, unless you have an extremely large signal dominating the local airwaves. Which is precisely the parent poster's point: with RF you are almost always doing something to demodulate the signal. Whether you are doing it with a sine wave or something more complicated is not that fundamentally different. (and if you're looking at a spectrum analysis, that is looking at the radio signal from the point of view of that sinusoidal modulation scheme, so you will see such signals 'above' the noise floor more readily than something using a different modulation).
I'd argue that "correlation" is an accurate description of what you're doing with Gold codes - you're testing the known sequence of the output of a PRNG against the received signal, and only accepting it when the data correlates, otherwise you're adjusting the offset and trying again until you find a high correlation (strong +ve and -ve spikes) or you give up and assume there's no transmission. There's nothing in the received signal that tells you there is a real signal there at all, without correlating against every possible offset.
If you compare that to the majority of radio transmissions modulated on a sine wave carrier, there is a clear signal there and you don't need to correlate anything to tell you that, and you don't need to keep trying different offsets - you can just demodulate using a carrier of the correct frequency and the result is correct, just with a slight phase shift relative to the local carrier and which probably isn't even relevant in the frequency domain of the signal.
The key point to me is the trying repeated offsets to try to pick out a signal well below the noise floor, and choosing the offset that provides the best correlation, compared to demodulating a very strong signal that's obviously there by just adding a carrier. The latter could be done using "correlation" if you're implementing an SDR, but it doesn't have to be, and most radio hams would prefer to think of it as a simple analogue operation instead.
A strong signal 'that's obviously there' is only obviously there after you've already filtered it to some extent. If you were to look at the raw broadband RF environment on a scope you very much would not see the vast majority of signals there. And when you're demodulating you do often need to tune the phase and frequency of the carrier you're demodulating with, as well. GNSS signals are just generally quite low bandwidth and so that process takes a while.
Not to say that such codes aren't a neat trick, but it's useful to consider that these are in many ways the same thing.
By "obviously there", I meant take some old analogue receiver and twiddle the tuning knob. The vast majority of radio transmissions are many orders of magnitude louder than the noise floor. They are very obviously there.
Tune your SDR radio down to 1.023MHz, you'll see nothing there at all. The signal is about 20dB below the noise floor. The only way you can pick out anything at all is by correlating it against the PRNG with the correct offset in the sequence.
The GP post (to be fair, I should have replied to the post 2 higher up) was arguing that all signals are weaker than the noise floor and demodulating using a carrier was exactly the same thing. It is in one way, but also not in another - in that you need to keep trying different offsets in the PRNG sequence until you find a correlation. That's why I think "correlation" is a sensible term for Gold Codes, but "demodulation" is better for signals modulated by a sine wave carrier.
Fixing them is completely doable, and the solutions are obvious, as you point out. But the political will to accept the obvious consequences just isn't there.
Meaning, the demographic distribution of students taking (and re-taking) the entrance exam is likely to not match the distribution of the state as a whole.
Rather than seeing this as a positive because it leads to the advancement of those who would be otherwise held back from high paying jobs, it will be denounced in coded language.
> Why do EV companies keep making this customer hostile decision?
Because it eliminates the headliner and insulation, which allows the roof to be an inch shorter while maintaining the same interior headroom. The has a direct impact on frontal area, which, in turn, has a direct impact on aerodynamic drag.
Reduced drag means greater range (or the same range with a smaller, less expensive battery).
Did you guys see how Tesla nerfed the least expensive Model Y by keeping the glass roof _and_ covering it from the inside with the headliner so it _looks_ cheaper?
A mile off Interstate-5 in the southern Central Valley, and you can’t tell you’re not in Texas oil country. Santa Barbara regularly has oil leaks from the offshore production in the Channel Islands area, and Beverly Hills High School famously has a productive oil well on campus.
So the state isn’t going to literally run out of oil (though lack of imports could lead to shortages).
reply