Hacker News: petschge

New comment by petschge in "The hidden engineering of runways"

petschge — Tue, 27 Jan 2026 02:21:38 +0000

IF the velocity would change from 0.7m/s to 0m/s over one second, the acceleration would be 0.7m/s/s. But if the time span over which that velocity change is (much) shorter, the acceleration would be (much) higher.

New comment by petschge in "Eliminating contrails from flying could be cheap"

petschge — Wed, 08 Oct 2025 03:40:23 +0000

You don't need to identify the A320 from 15 pixels. Once you see a 15 pixel signature that changes between subsequent frames you point the one extra camera on a movable mount with a 600mm lens on it at it. Now you get a few hundred pixels.

New comment by petschge in "Android Earthquake Alerts: A global system for early warning"

petschge — Tue, 22 Jul 2025 23:22:36 +0000

Obligatory XKCD: https://xkcd.com/723/

New comment by petschge in "Transparent peer review to be extended to all of Nature's research papers"

petschge — Mon, 16 Jun 2025 22:27:06 +0000

Seeing how the sausage gets made makes you realize ALL the downsides and things you'd rather not have known. That doesn't mean you can think of a way to fix science. Let alone get the required funding to make an actual attempt.

New comment by petschge in "Infinite Grid of Resistors"

petschge — Sat, 14 Jun 2025 22:16:28 +0000

New comment by petschge in "CERN releases report on the feasibility of a possible Future Circular Collider"

petschge — Sun, 13 Apr 2025 14:51:21 +0000

For scale: The LHC has more than 11km diameter and the deepest mine we have built is 4km. Adding vertical distance is much harder than making the diameter of the circular tunnel larger.

New comment by petschge in "Long division verified via Hoare logic"

petschge — Wed, 26 Feb 2025 19:55:43 +0000

How do you encode the difference between a method that adds and a method that multiplies two numbers in the type signature?

New comment by petschge in "Plane crashes, overturns during landing at Toronto airport"

petschge — Tue, 18 Feb 2025 02:09:46 +0000

Remember that ATC will give wind speeds in knots, not km/h.

New comment by petschge in "How Medical Research Cuts Would Hit Colleges and Hospitals in Every State"

petschge — Sun, 16 Feb 2025 03:28:20 +0000

I was referring to the "The US government is trying to bring back nuclear safety employees it fired on Thursday, but is struggling to let them know they should return to work, NBC News has reported. [...]An email obtained by NBC said the letters for some NNSA employees 'are being rescinded, but we do not have a good way to get in touch with those personnel'." part. It's about 300 people affected. And when you apply at these types of positions they ARE aware of private contact information.

New comment by petschge in "How Medical Research Cuts Would Hit Colleges and Hospitals in Every State"

petschge — Sun, 16 Feb 2025 03:12:01 +0000

How chaotic does https://www.bbc.com/news/articles/c4g3nrx1dq5o sound to you?

New comment by petschge in "An Illustrated Guide to Maritime Signal Flags"

petschge — Wed, 23 Oct 2024 14:15:45 +0000

In my experience people understand perfectly well but assume that you are ex-military.

New comment by petschge in "Deals with the devil aren't what they used to be"

petschge — Thu, 15 Aug 2024 21:17:22 +0000

How is that extortionate? Using the inflation calculator of the Bank of England that is 86 pounds now or $110. Admittedly that more expensive than the current price of $24 for the paper back, but at worst that seems to be twice as expensive as a common price for a 850 page book?

New comment by petschge in "Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W"

petschge — Fri, 02 Aug 2024 19:32:24 +0000

If that thing had VGA-in on top of the keyboard and mouse out via USB, it would be a great tool to carry in a data center when you have to physically interact with a machine.

New comment by petschge in "Mining JIT traces for missing optimizations with Z3"

petschge — Mon, 22 Jul 2024 02:11:18 +0000

Sure, for booleans you can just test all combinations of input arguments. In some cases you can do the same for all possible 32 bit float or int values that you have as input. But for 64 bit integers (let alone several of them) that's not feasible.

New comment by petschge in "Operations begin to de-ice Euclid’s vision"

petschge — Tue, 19 Mar 2024 16:53:20 +0000

That's what? Fourteen F-35s? Shared by all of Europe. Or in other words 30 cents per European for each of 6 years. Science is much cheaper than you think. And much cheaper than not doing it.

New comment by petschge in "Signal Is Down"

petschge — Fri, 08 Mar 2024 00:39:11 +0000

This has now changed to "Signal is experiencing technical difficulties. We are working hard to restore service as quickly as possible."

New comment by petschge in "Signal Is Down"

petschge — Fri, 08 Mar 2024 00:16:45 +0000

https://status.signal.org/ says it's "up and running" but that is clearly not the case. I find that more concerning than the outage itself.

New comment by petschge in "Sweden Is a NATO Member"

petschge — Thu, 07 Mar 2024 17:29:32 +0000

There is the GAFFTC (German Air Force Flying Training Center) at Holloman AFB?

Gender differences in Dutch research funding over time

petschge — Mon, 19 Feb 2024 15:03:57 +0000

Article URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0297311

Comments URL: https://news.ycombinator.com/item?id=39430496

Points: 35

# Comments: 20

New comment by petschge in "Why we can’t build family-sized apartments in North America"

petschge — Fri, 09 Feb 2024 19:15:25 +0000

In Europe a closet is furniture, not a built in room.