That was beautiful: subtle and witty.
That was beautiful: subtle and witty.
Ed is the standard. Edlin is, of course, based on ed.
"Ed is for those who can remember what they are working on." - patl.
I turn on my phone's GPS to use an on-line mapping tool only rarely, such as when I'm visiting an unfamiliar city. Otherwise, I check a mapping service beforehand, memorize any key specifics, and off we go!
The upside: I'm always looking at the road and can avoid the idiots who aren't.
Ah, no. A stable oscillator can be easily constructed that fully resists changes in input (power supply) voltage. Your $5 quartz watch has one. From that perspective I really only see a difference being one of scale: this is a first only because it has been done on an atomic level.
And now that I happened to use the word "atomic", that makes me question: what's the difference between this and the cesium oscillator in an atomic clock?
I read the linked article (which is a summary of the real report). It's not my field.
How is what they describe anything other than just a stable oscillator? It consumes energy, since to run it requires regular (although perhaps not periodic?) pulses of light.
How is this different from a macroscopic tuned circuit that also resists changes in driving force, and oscillates at a stable frequency? Because it's made with a handful of atoms instead of gazoober electrons streaming around a circuit? I'm (not intentionally) being snarky -- I'm curious because by the article the physicists are peeing all over themselves in excitement, so I'm guessing they think there's something to this that I don't see.
So the supposition is that kilns have been found with pots inside, we can demonstrate that the pots have been left undisturbed since the start of their last firing many thousands of years ago so you can judge the orientation of the earth's field at the time of cooling, and, moreover, we know the kilns haven't been moved either?
Color me skeptical.
Note that the article talks about intensity not orientation. Intensity, I understand. Orientation seems implausible with this method.
And you know that the pottery wasn't moved from its original orientation during cooling because
Multiple samples from independent sources and locations help mitigate those concerns, along with a slowly-varying time course of the field strength.
What manufacturing circumstances would change the strength of magnetization for ferrous inclusions in cooling pottery that would be present before, say, 0 AD to pick a convenient, arbitrary and approximately relevant threshold?
I can see making a good guess for geological structures, but pottery?
The subtitle of the article makes it pretty clear that the handheld market is not what is being targeted here:
It might be an ideal form of energy storage for solar and wind power.
It's intended for fixed-location installations where physical volume isn't such a concern, so energy density, while important, doesn't matter as much. The same niche is currently occupied by the nickel-iron battery that was recently mentioned in another
Here's the thing, quick and simple: Uber is not known for it's warm feelings toward its employees/contractors (depending on which side of the law you sit on). Driving a four-wheeled vehicle on the ground is simple enough that you can do it while seriously impaired without too much risk. Not so with something flying through the air. Pilots are not the same as the semi-employable edge of society that Uber is famous for employing/contracting (yes, I'm being intentionally inflammatory here).
Anyone, but anyone, can drive a car. Not everyone has the situational awareness to fly you through the air, and the vast majority of Uber drivers I've had would not pass even a low-bar flight test. How are they going to surmount the barrier that getting a pilot's license requires? Are they going to attempt to establish a new class of licence in the eyes of the FAA? Good luck with that. Engineering is one thing. Fighting government in 50 states plus the feds, now that's something entirely different. Finding talented people to pilot these things for bottom-of-the-bucket wages, well, that's crazy impossible.
Let's say it together: "Wireless Access Point." There, I knew you could do it. A router is not the same thing, although many wireless access points are also routers, not all are, and not all routers have wireless features!
Yeah, and the damage potentially happens far faster than your hundred-millisecond scale reaction time.
We've been creating mice with human immune systems for probably decades now. Heck, you can even order them from commercial suppliers:
The soft helmets are a cool idea. But when they're unzipped, as you can see in the many photos with the helmets at that pose, there's a lot of stress at the zipper. That's going to be a failure point, just like it is on your luggage. I'm surprised that there isn't a better solution for that.
That said, it took me all of 10 seconds to see that, and the folks at Boeing aren't idiots, so I hope they have tested the hinging of their zippers!
"The hottest places in Hell are reserved for those who, in times of moral crisis, preserved their neutrality." -- Dante