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petschge

2,505 karma · joined February 16, 2015

Human not Orc, but my ID is 0000-0002-8906-7783
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petschge··on ThinkPad I9990303 Error Catch-22
I always read that as "I'm not detecting a keyboard. If I'm wrong about that let me know by hitting F1. (And if I'm right I don't want to waste time by booting, because you'll have to power down to fix this anyways.)" Because that was in the time before keyboards were hotpluggable.
petschge··on A shell exclamation mark is not for yelling. Be lazy
You can just add something like (\\!) in your PS1 and get just that.

PS1="(\\!) \[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ "

as a full working example

petschge··on The hidden engineering of runways
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.
petschge··on Eliminating contrails from flying could be cheap
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.
petschge··on Android Earthquake Alerts: A global system for early warning
Obligatory XKCD: https://xkcd.com/723/
petschge··on Transparent peer review to be extended to all of Nature's research papers
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.
petschge··on Infinite Grid of Resistors
See also https://xkcd.com/356/
petschge··on CERN releases report on the feasibility of a possible Future Circular Collider
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.
petschge··on Long division verified via Hoare logic
How do you encode the difference between a method that adds and a method that multiplies two numbers in the type signature?
petschge··on Plane crashes, overturns during landing at Toronto airport
Remember that ATC will give wind speeds in knots, not km/h.
petschge··on How Medical Research Cuts Would Hit Colleges and Hospitals in Every State
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.
petschge··on How Medical Research Cuts Would Hit Colleges and Hospitals in Every State
How chaotic does https://www.bbc.com/news/articles/c4g3nrx1dq5o sound to you?
petschge··on An Illustrated Guide to Maritime Signal Flags
In my experience people understand perfectly well but assume that you are ex-military.
petschge··on Deals with the devil aren't what they used to be
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?
petschge··on Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W
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.
petschge··on Mining JIT traces for missing optimizations with Z3
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.
petschge··on Operations begin to de-ice Euclid’s vision
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.
petschge··on Signal Is Down
This has now changed to "Signal is experiencing technical difficulties. We are working hard to restore service as quickly as possible."
petschge··on Signal Is Down
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.
petschge··on Sweden Is a NATO Member
There is the GAFFTC (German Air Force Flying Training Center) at Holloman AFB?
petschge··on Why we can’t build family-sized apartments in North America
In Europe a closet is furniture, not a built in room.
petschge··on SI Units for Request Rate
While Hertz are 1/s, there is implications between using frequencies in Hertz and rates in 1/s. Units are not just something to mechanically check, but also for communication with other humans. So connotations matter in addition to denotation.
petschge··on Lightweight woven helical antenna could replace field-deployed dishes
To get sensitivity you actually need collection area.
petschge··on Ask HN: Are height adjustable desks worth it?
Everybody in this thread is insanely positive on height adjustable desks, but I have had height adjustable desks at different employers since 2013, and I have never used them as standing desks. They are great to get the height exactly right in the beginning and then I never move them again. I'd rather have a larger table than an height adjustable desk.
petschge··on 802.11ah Wi-Fi HaLOW: The 1 Kilometer WiFi Standard
Can you tell more or link to a description? What where you able to observe?
petschge··on Bodycams for civilians
Just a sidebar on the word "civilian". Police offices in the US like to call member of the public "civilians", but they themselves are civilians as they do not fall under the military code of justice. Unless you want to argue that they are an occupying force that is in armed conflict with the population and should be treated as combatants under the Geneva Conventions...
petschge··on Swedish Tesla strike goes international as Norwegian and Danish unions join in
Always remember that historically striking is the friendly alternative to dragging the factory owner and their family from their home, killing them, setting their house on fire and running the factory yourself.
petschge··on US Visual Approaches: Lessons from the LH458 Incident
How safe are an extra hour around KSFO, an hour turnaround and 45 more minutes flying after a long haul flight because an ATC wants to feel like the unquestioned king?
petschge··on US Visual Approaches: Lessons from the LH458 Incident
Should have declared a fuel emergency and fucked that controller well and good. These games that ATC in America plays with safety to improve throughput (read profits) need to end before we have 400 souls lost.
petschge··on Quantum particles can feel the influence of gravitational fields
You can describe it that way. But different parts of spacetime can have different curvature, so you get different impact of gravity. No matter how you describe it, gravity is different on Earth, Moon or in deep space and your theory has to model that no matter if it uses forces, curvature of spacetime or something else.
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