I'm reasonably certain it was McDonnel Douglas that acquired Boeing with Boeing's own money. Most likely everyone who designed that plane has retired at this point anyways.
Agreed. I was kind of surprised to see 54 VDC mentioned. I am assuming this is low enough to meet some threshold for some kind of safety regulation. In other words, it doesn't shock you just 220 VAC would. I'm not entirely convinced of that however as it turns out bus bars are really dangerous in general. A 54 VDC bus bar won't shock you, but if you drop even a paperclip between the bus bar and a metal part that is grounded it basically disappears instantly in a small blast of plasma. The injury from that can be far worse than any shock you'd receive.
My experience has been that SELV (safety extra low voltage, less than 60V peak and less than 240VA) is considered safe and anything exceeding that needs certain levels of protection.
But bus bars generally should be protected regardless of voltage as they carry currents from high current capacity sources so even a lower voltage can be a safety concern.
Many server power supplies can take AC or DC input, with the DC input in the 300-500V range as this is comparable to the boost voltage for the AC power factor correction circuit. I just assumed most data centers using DC would be distributing around 400V within each rack.
It's funny, David Brin used to flog the idea of "sousveillance," meaning that mass surveillance was inevitable and couldn't be reformed but we could use it to hold the elite accountable. What a joke.
I'm relatively certain that neither Concorde nor any passenger jets burn aviation gas. It may be physically possible, but would be extremely ill advised given the lead additive
I'm pretty sure they weren't referring to 100LL, but either way even back in the 90s Jet-A was around USD 0.50 per gallon, in the 60s it was nearly 1/5th of even that.
Fair. Edited my comment to note that both sorts of fuels were in that price range, but didn't look up the specific fuel specification used by the Concorde.
Some version of Aviation Turbine Fuel (the other ATF) is used in passenger jets, which is either Jet A or Jet A-1 for colder, non-American flights. It is a kerosene-based fuel which does not contain any lead.
In the states I've lived installing a big screen like that in your car is against the law. Unless the manufacturer specified it as original equipment. So yes, a bigger screen is a selling point
Somewhat ironically if they were laser focused using infared lasers, wouldn't that imply the company was not very specific at all? Infared is something like 700 nm, which would be huge in terms of transistors
State of the art lithography currently uses extreme ultraviolet, which is 13.5nm. So maybe they are EUV laser-focused, just with many mirrors pointing it in 5 different directions?
It'd be interesting to see some market survey data showing the number of AI laptops sold & the number of users that actively use the acceleration capabilities for any task, even once.
Remove background from an image. Summarize some text. OCR to select text or click links in a screenshot. Relighting and centering you in your webcam. Semantic search for images and files.
A lot of that is in the first party Mac and Windows apps.
I don't find gas leaf blowers exceptionally annoying. They aren't really anymore annoying that anything else going on in my area. It's what leaf blowers are used for that bother me. I see people just using them to blow leaves either into the street or into neighbors yards. What is the utility in this? Do they think leaves disappear?
They’re much louder than other common lawn equipment. People also tend to use them more frequently. Most of my neighbors will only run a lawnmower once a week or every 2 weeks. But they’ll be out there every day with a leaf blower during parts of the year.
Agreed, but I'm comparing them to the other stuff that is always going on. During the week you can always hear: roofing nailguns, wood chipper, backup beeper, & someone playing music.
That depends on where you’re at. I live in a neighborhood with 2-5 acre lots. I can’t hear any of those things unless my immediate neighbors are doing them, which they rarely are.
I can hear leaf blowers constantly though because you can hear them in a quarter mile radius.
Also local ordinances in most places ban loud noises without a permit. But lawn maintenance equipment is a specific exception.
I've owned the property I've been referring to for over 6 years. Never seen a street sweeper. Leaves in the street from my neighbors yards are about 1 foot deep at the curb
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