When you're pushing the boundaries, anything over 50% is good.
Is it? It depends on the data, the model, the thresholds for "correct forecast," etc. There are lots of places in the world where a "persistence" forecast (i.e., today will be the same as yesterday) will net you a greater than 50% accuracy within a reasonable margin of error. And one should also always consider forecasting models against general predicted climate averages. Again, taking those into account, a forecast system just using climate averages might do pretty well too.
It really depends on what the percentage "accuracy" means in this case and how it was measured. I'm guessing they wouldn't bother reporting it if it weren't significant, but just how significant is difficult to tell without the details (and it seems the full research paper is behind a paywall).
Otherwise citing a number like "62% accuracy" is utterly meaningless. If you had a task like, "Guess how tall the next person to walk into the building will be," and I achieved 62% accuracy, that could be remarkable and improbable if the margin of error was 1/8 of an inch. But if I instead was guessing "Taller than 1 foot or shorter than 1 foot," then 62% accuracy might mean I'm mentally retarded.
No, you can't predict the weather on a given day months in advance (the limit is believed to be around 21 days) because the atmosphere is a chaotic system and small errors grow too large to make predictions useful.
Less than that if there's a volcanic or solar event.
Ahuxley, I appreciate the thought that went into that, but all that isn't necessary.
Just put a couple of car batteries in a drug house to power a brute-force broadband R.F. noise generator and broadband amplifier to be kicked on when the lookout gives the signal a raid is incoming.
Not only no remotely-controlled drones, no police radios, no cellphones, nada. If it ain't wired together it ain't talking, at least within a few blocks. No tactical comms, no calls for backup, no alerts about fleeing suspects, no calls for med-evac for wounded.
And, it's a lot cheaper, far easier to make, and less labor-intensive.
I appreciate the explanation, but isn't it more that the new system was added in rush (to replace the old ones) as opposed to it being the first time used? It seems like the NASA successes were first time uses of those landing systems also, from what I remember.
Also, I really don't understand how IP applies since these are not products for commercial sale nor used for commercial purposes. I don't see where NASA could even bring a suit.
You can't just handwave away the massive cost of proving a charger per parking space, nor even the cost of an outlet per parking space along with the electrical lines buried capable of having every single parking space drawing enough current to charge...
Even if that were practical what exactly do you imagine will happen to someone's personal charging cables or equipment left unattended overnight. Thieves are taking copper pipe out of buildings with the water still on...
Great. Let me know when it's bulletproof in a 2D environment and I'll consider the 3D version.
That's actually backwards. Solving for the 3D case is vastly simpler, because while in the air you have very few obstacles to content with, you basically just have to be sure you can react to other planes, and have programmed in the coordinates of no-fly zones - otherwise travel is just a straight line. There are already drones that can find their way back home if the control signal is lost, and almost drones that can fly around tree branches without hitting them...
For takeoff landing you can simply dictate that a solid volume of sufficient space must be below or above you to land/takeoff.
I've noticed that also in the past when traveling and staying with friends in Europe.
That's why I still think the future for most electric cars will end up being hydrogen, not battery power - though with advancements like these battery may be a higher percentage, especially if you could go somewhere just one day a week to spend a half hour charging.
Does that pass for a clever jibe in your social circles?
How come everyone's going so slow if it's called rush hour?