nuccy

9 ms·

1.
by nuccy 6d ago
The title (likely intentionally) is misleading, it should say "travelling faster than light in a medium". Nothing here travels faster than light in vacuum. BTW there are special types of telescopes used to observe gamma rays - the
2.
by nuccy 1mo ago
The heat is dissipated by radiation, that's why apart of solar panels all sattelites and space stations also have radiators for thermal management. The average space temperature (far away from stars) is 2.7K (the temperature of cosmic
3.
by nuccy 4mo ago
Best case is if gaming and productivity (with high memory use) activities are not concurrent, and productivity applications are stopped before gaming starts, then `swapoff` can easily release swap device without restart.
4.
by nuccy 4mo ago
In our lab tests phase lock jitter between WR client and master is about 10ps (picoseconds) over 50km fiber (with temperature change of the fiber, so WR actively compensates elongations), so relative clock of one system can be transmitted w
5.
by nuccy 4mo ago
Please comsider adding log-scales to be able to compare related but wastly different in popularity topics. Also would be nice to show one topic versus another to see a correlation. Thanks.
6.
by nuccy 9mo ago
Rivers (e.g. Mississipi) work with much smaller gradient of just 0.01% [1], while with your assumption it would be 0.25%, so 25x. Maybe instead it needs to pass under the rivers [2: cross-section] surrounding New-York, which may be much dee
7.
by nuccy 9mo ago
As of now, for testing, the two WR endpoints are sitting on the same desk with 50km fiber in a thermal chamber (simulating temperature changes in the soil), but in future they will be separated indeed.
8.
by nuccy 9mo ago
As a user of WhiteRabbit, I can confirm a sub-10ps sync (two clocks phase lock) over 50km fiber connection for variable temperature of fiber (biggest problem of clock sync over fibers is temperature induced length change of the fiber itself
9.
by nuccy 9mo ago
Nature (laws of physics) is agains you on this: it is in fact impossible for everyone. What is in sync for some observers can be out of sync for others (depends on where they are, i.e. gravity, and how they relatively move). See general and
10.
by nuccy 10mo ago
Many reactors are built far away from coasts, they need water in general, but artificial lakes, or rivers are enough.
11.
by nuccy 10mo ago
Actually even within Apple ecosystem not all devices are made equal. MacBooks lack some features available for AirPods Pro on iPhones, e.g. seal check, translation, everything in the "accessibility" category: button press duration
12.
by nuccy 10mo ago
I would actually consider sticking the opposite "Nuclear power? Yes, please!" (Same for solar, wind, geothermal of course). Is there a sticker for pro-nuclear power movement? P.S. There's a nice recent video to have a glimpse
13.
by nuccy 1y ago
Answering to your and original question above: there are no poles (or axes of rotation) in the Universe. On large scales (think distances to include thousands and millions of galaxies each with billions of stars with even more planets) the
14.
by nuccy 2y ago
To add to the list (the order is arbitrary): 5. Advances in the multi-messenger observations, where apart of photons and gravitational waves, astronomers can detects also neutrinos with specialized neutrino detectors, e.g.: IceCube [a], tho
15.
by nuccy 2y ago
Some technologies have been lost, even though they were superior to what is available today. Take, for example, the old “green/blue screen” technique using sodium vapor lamps, used by Walt Disney in film production in the pre-digital e
16.
by nuccy 2y ago
Another non-obvious problem is that RTGs, as any other thermal machines, need a gradient of temperature to work, i.e. to generate electrical power there should be hot (nuclear material) and cold (radiators) side. On interplanetary spacecraf
17.
by nuccy 2y ago
Generally I agree, but Moon is not a bad place for solar panels if a spacecraft has no contingencies and is able to harvest energy during Moon's day and store it in batteries to be used over the night. The sufficient power can be gener
18.
by nuccy 2y ago
Thus two messages for every other country: 1. Make nukes, never give up on those regardless of what assurances of safety you get 2. If you are bigger and stronger - you are right, do whatever you want, international laws and rules do not ma
19.
by nuccy 2y ago
The operations are international and are carried out not only by squirrels, weasels (some say martens) are also involved. One of those (unlikely unintentionally) had shutdown the Large Hadron Collider at CERN in 2016: 1. https://
20.
by nuccy 2y ago
The video is indeed very nice, it shows few things [1] not mentioned on the website: - the chain is routed through the add-on device, so it should be longer than usual - the pedals don't rotate when the chain and the wheel do, so there
21.
by nuccy 2y ago
You are right: to find a location from a star image you need a true horizon, but unless UAV is pulling some Gs even a basic accelerometer would give you the horizon, accuracy of that estimation will limit the accuracy of your location. Rega
22.
by nuccy 2y ago
If you see satellites then likely you see even more stars. Unlike satellites the stars barelly move (actually they do, see "proper motion" [1]) relatively to each other, so a catalogue of stars (two coordinates values and two prop
23.
by nuccy 2y ago
ISO is one of those companies, where creativity of employees is blossoming through the roof. Every day they come to work and start the day with a brainstorming "What standard do we create today?". ISO can standardise anything: a s
24.
by nuccy 2y ago
SpaceX mostly - a mixture of managing and engineering skills to approach the problems generally regarded as impossible.
25.
by nuccy 2y ago
Same for me, I was a big fan of his engineering mindset, but even though he probably still has that, the negative stuff he says and now does completely overwhelms everything.
26.
by nuccy 2y ago
No it is not destructive, math-wise the transformation is bidirectional and can be used many times without any detail losses. The problem is sampling by the image sensor, some pixels endup with larger fiel-of-view than others, so reconstruc
27.
by nuccy 2y ago
Not kids, only personal safety. Russia is burying those male kids in the ukrainian soil in scale incomparable with any prior USSR/russian wars excepting only WW2.
28.
by nuccy 2y ago
The two recently sunken tankers sunk because of bad weather and russian negligence and lack of any common sense on safety - they were super old (built in 60s) river tankers, which are narrow but long. So to make them "sea worthy"
29.
by nuccy 2y ago
The answer is: nothing. Russian drones and cruise missiles fall on Nato soil already and enter its airspace on a regular basis, though so far unintentionally . E.g.: 1. https://www.reuters.com/world/europe/romania
30.
by nuccy 2y ago
Unlike previously cut cables, which were mostly communication fiber cables, this particular one is a power cable and during the cut it was delivering 650MW at 450kV [1] so almost 1450A of current. If it was cut by accident by an anchor I co

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