Comment Re:Wrong symbol (Score 1) 73
gadolinium barium copper oxide (GdBCO) superconductor
Boron is B, Barium is Ba...
Worse, the mistake showed up in the press release from Cambridge. I guess their editors are about as good at Slashdot's!
gadolinium barium copper oxide (GdBCO) superconductor
Boron is B, Barium is Ba...
Worse, the mistake showed up in the press release from Cambridge. I guess their editors are about as good at Slashdot's!
The first chest compression might work a bit, but then you go flying across the room. The shock from hitting the bulkhead might provide another stimulation to the heart, but after that you'd probably just roll up into a ball or something and drift around a bit.
The Hollywood fairy tale of CPR, or a sudden thump to the chest, causing someone's heart to start beating again is just that - a fairy tale. Even today, with CPR knowledge relatively widespread, most people that have a heart attack (i.e., the heart actually stops beating) will die of it. The purpose of CPR is to keep the rest of you - principally your brain - properly oxygenated until definitive medical care (drugs, defibrillator, oxygen, stents, etc) can properly revive you. The notion that astronauts are going to perform CPR on one of their colleagues for several hours, through re-entry, and all the way to a hospital is laughable. Even if the astronaut survives, all that's left would be a turnip that can breathe.
This is why there is zero oversight from Kickstarter/Amazon - they get their 20% cut if the projects gets funded
I gotta make some correction there - it's not a 20% cut. Kickstarter get 5%. Amazon get 3-5% depending on several factors. Granted, it's still a lot of money, and provides a powerful incentive for them to have as many projects funded as possible, but you're overstating it by 2x or more.
in which position are white sharks? Next to deaths by stepping on a rusty nail while running at the beach?
Hey, man don't underestimate the dangers of tetanus. Rusty nails are a real killer, especially when they're attached to boards.
This is one of the many reasons I don't go anywhere near the ocean
The reason I don't go anywhere near the ocean is because I've got a chance of being killed in a car accident on my way there (and back). Actually being killed in the ocean? That's nuthin'.
When you are printing a 10nm wire into the silicon chip, you are not very far from doing it atom by atom as the wire is only like 50 atoms wide.
Perhaps, but at least with lithography you can do it across the entire wafer (or die) area in a single go. That's batch processing all the transistors at once, rather than serially processing them with AFM.
Silicon atoms are 0.2nm wide. We're getting into "why aren't you just directly pushing the atoms around with atomic force microscopy?" territory.
you probably could. However, for a processor with 10^9 transistors and perhaps a dozen layers, it gets pretty time-consuming to build it by pushing atoms around one at a time.
But as we approach 10nm, 7nm, and 5nm, the low-hanging fruit disappears
I'd say the low-hanging fruit disappeared a few decades ago. Continuing down the feature size curve has for many years required a whole slew of every-more-complicated tricks and techniques.
That said: yes, going forward is going to be increasingly difficult. You will eventually reach an insurmountable limit that no amount of trickery or technology will be able to overcome. I predict it'll be somewhere around the 0 nm process node.
Right now a typical installation (complete, by a contractor, not DIY) is $7/watt for residential, and sunny places like LA get 5-5.5 hours/day, or 1800-1900h/year, with most panels warrantied for 20 years. That's 37000Wh life per panel watt, or 37kWh
you need to refresh your dimensional analysis, because you are missing a term or two. 1800-1900h/year * 20 years = 37000 hours of productive life per panel, not 37000 watt-hours of total output. If the total lifetime output of a solar panel over 20 years was a measly 37 kWh (roughly the daily energy consumption of a home in the United States) no one would buy them.
What's missing in your analysis is the power output of the panel during those daylit hours. For the 5 hours of peak generation during the day, you could expect about 200 W for a "standard" panel. (You'll get not-insignificant power generation during all daylight hours, but we'll focus on peak generation for now.) That brings the lifetime output to something like 7.4 MWh, which at wholesale (not residential customer) electrical rates of $50/MWh equates to $370 worth of electricity. Even taking net present value into consideration, the energy cost breakeven for manufacturing solar cells is measured in years, if not months.
Solar panels are not merely an energy storage device that captures conventional energy sources during their manufacture, only to trickle that energy out with sunshine. They are a net energy producer many times over. With (currently impractical, not-at-scale) methods for storing and buffering the power, it is feasible to power the entire PV manufacturing and installation pipeline entirely with solar power.
It is graduated from 1 to 11. At the bottom is the subscript "MPH x 100". I'm used more to "RPM x 100"!
For a mass production vehicle, the display may not make a lot of sense. But for the one guy who is ever going to drive the car, I think we can trust him to understand what it means. It's no worse than an aircraft altimeter.
jet engines are for flying, any other use is stupid
don't tell that to Bruce Wayne!
Real Programmers don't eat quiche. They eat Twinkies and Szechwan food.