Giefo6ah · HackerTrans

قبل 18 ساعةdiscuss

They clearly didn't have the compute capacity ready to release Fable at any price that would have seemed "worth it".

قبل 4 أيامdiscuss

There's nothing special about threads vs processes in Linux. mmap works the same, the challenge is to map the same file. You can share a path, pass a file descriptor via fork or unix domain socket, among other techniques.

Giefo6ah

قبل 8 أيامdiscuss

You don't rent your football field from FIFA. You can, if you wish, own the field you play at.

You may have heard of football clubs: If it's too expensive you can pool resources with your friends.

Giefo6ah

قبل 12 يومًاdiscuss

This is because blurays, like vinyl records, are efficiently stamped into plastic from metallic masters with negligible faults. You can't do this for electronic storage.

Giefo6ah

قبل 17 يومًاdiscuss

In 1987 a supernova was observed in the sky.

In a great coincidence, just months after being put into operation, a new type of detector meant to study if protons are stable, detected instead the neutrinos coming from the supernova in a way that could be individually timestamped. No other supernova has been visible with the naked eye ever since, or is likely to be seen in our lifetimes.

https://sci-hub.st/10.1103/PhysRevLett.58.1494

The neutrinos arrived 3 hours before the supernova was first seen in the sky. This could mean that neutrinos travel faster than light: that they negative mass. It has not been ruled out yet, but it would take extraordinary evidence for any physicist to admit to a faster-than-light particle.

The core of supernovae are predicted to take around 4 seconds to explode, and during that time they release 99% of the energy that was binding the star together as neutrinos. Once this has happened, however, it takes several hours for the explosion to be visible outside.

If they had 0 mass, you'd expect the burst of neutrinos to last for about 4 seconds. The detected spread was of around 6 seconds.

It was likely that the model for supernovae was missing something. But perhaps neutrinos are slowed down as they interact with other particles on the way here from the supernova. Massless particles always travel at the speed of light, only massive particles can be slowed down. Perhaps neutrinos have mass.

In order to test the basic theory of nuclear fusion in stars, the "Homestake experiment" was set up to count neutrinos from the Sun.

https://sci-hub.st/10.1126/science.191.4224.264

The experiment consists of a big tank of perchloroethylene. Electron neutrinos (and only electron neutrinos) are expected to collide with the Cl-37 atoms to form Ar-37 in the reverse reaction to that of radioactive beta decay. Then the individual Ar-37 atoms can be separated into a gas and counted.

According to the brightness of the Sun, it was expected that around 50 such Ar-37 atoms would be detected every 100 days. Only 17 were observerd, on average. A third of the neutrinos went missing.

A new round of experiments was made, culminating in the fantastically sophisticated Super-Kamiokande, which is sentitive to all other "flavours" of neutrinos, and also capable of detecting the direction they are coming from.

https://arxiv.org/pdf/hep-ex/9807003

It was confirmed that the missing 2/3 of the electron neutrinos expected to come from the Sun had somehow transformed into the other flavours. What's more, muon neutrinos coming from cosmic ray decay in the atmosphere were detected half as frequently in an upwards direction, coming from the other side of the Earth, than in the downwards direction.

The conclusion is that neutrinos must change flavour as they move through space.

Particle accelerators were built in several sites, pointing towards the Super-Kamiokande across the earth's crust, sending a beam of neutrinos of a known kind to measure this "oscillation".

https://arxiv.org/pdf/hep-ex/0606032

Since they have mass, the artificial neutrinos are slightly dispersed by their passage through the Earth's crust. Their arrival time forms three different overlapping peaks, corresponding to three different masses.

The proportion of each kind changes along the path in a sinusoidal fashion, but the mass peaks remain.

The current interpretation is that the mass and the flavour of neutrinos are (almost) "conjugate" properties of the particles, in a similar way to the well-known uncertainty between position and momentum, or between time and frequency in Fourier analysis.

As a neutrino moves through space, its mass can be measured more and more accurately from the dispersion in arrival times. The better we know the mass of the particle, the more uncertain we are of its flavour. If because of the great distances the mass is well known, as is the case with the solar neutrinos, then the three flavours are almost completely entangled.

On short distances the flavour is well determined but the masses are uncertain.

Giefo6ah

قبل 18 يومًاdiscuss

The labour theory of value is Adam Smith's, not Marx's.

Giefo6ah

قبل 18 يومًاdiscuss

https://en.wikipedia.org/wiki/X_Window_System

Giefo6ah

قبل 23 يومًاdiscuss

The original 1953 NTSC standard specified phosphors with a way bigger gamut than sRGB, that were chosen to approximate the gamut of film projectors.

Original NTSC cyans are more saturated than even DCI-P3 cyans.

Typical CRTs use the cheaper, brighter phosphors specified by SMPTE C (the basis for the sRGB gamut) and a circuit that pumps the saturation to compensate.

It's likely your screen uses the better phosphors instead of a colour correction circuit.

Giefo6ah

قبل 26 يومًاdiscuss

What would be the practical difference between an order from a party cadre in a private firm and a national security letter?

Giefo6ah

الشهر الماضيdiscuss

tombert should instead long QQQ and short the bits they don't like

Giefo6ah

قبل شهرينdiscuss

Yet another victim of IPv4, and you still find countless detractors of IPv6 on every thread where it's mentioned.

Giefo6ah

قبل 3 أشهرdiscuss

Most feature DVDs are 8 Mbps.

It's certainly blurrier than Netflix, but dark scenes, grain and textures are usually much more detailed on a DVD nonetheless.

Giefo6ah

قبل 3 أشهرdiscuss

It's often better than a 5 Mbps 1080p

Giefo6ah

قبل 4 أشهرdiscuss

I was assigned an E14 once. Compared to a T14:

The case is all thick ABS.

It weighs like 2.4 kg, and the weight is unbalanced.

The USB-C charge only works at 20V, nothing less.

While charging it overheats and spins up the fans.

It came with a TN screen with terrible viewing angles, that could not be used in a brightly lit room. I didn't use the laptop for two months while I waited for a replacement screen from aliexpress.

Keyboard is much thinner, the trackpoint drifts easily.

Camera quality is worse, somehow it cannot handle sun-lit scenes. Microphone and speakers are similar to the T14.

It stopped receiving firmware updates after two years.

It uses about 0.5 W while suspended, so its tiny 48 Wh battery typically doesn't last the weekend with the lid closed.

The motherboard has design issues, a missing protection diode in the headphone jack microphone input ended up frying the CPU due to a ground loop. Meanwhile the T14 has eaten the same ground loop and even a 48V passive PoE in an accident and dealt with it by rebooting. A T450 from 2015 is still running.

Giefo6ah

قبل 4 أشهرdiscuss

> After 24 months, one of the drives had a %95 loss, almost every picture was lost cut-off bottom half or so.

If these are JPEGs with a grey or green lower half, it's likely only a few 16x16 macroblocks are corrupted and you can recover the rest.

This cannot be done programmatically because you have to guess what the average colour of the block was, but it can be worth it for precious pictures.

Giefo6ah

قبل 5 أشهرdiscuss

Ceph solves the distributed consistent block storage problem very well. But I hardly ever need that problem solved, it's way more often that I need a distributed highly available blob storage, and Ceph makes the wrong tradeoffs for this task.

Giefo6ah

قبل 5 أشهرdiscuss

And how are you supposed to convert USD to USDC to local currency at par? The exchange fees end up eating any savings you got from not using the normie SWIFT network, and then at tax filing time you have to account for paying / being paid in specie instead of cash.

Giefo6ah

قبل 6 أشهرdiscuss

Let's say the average firm has 10 workers. 90% of people are nihilists and empty lifers?

Do I want to lead a business filled with losers?

Giefo6ah

قبل 6 أشهرdiscuss

That simple, implicit standard exists since RFC793:

  Simultaneous initiation is only slightly more complex, as is shown in
  figure 8.  Each TCP cycles from CLOSED to SYN-SENT to SYN-RECEIVED to
  ESTABLISHED.



      TCP A                                            TCP B

  1.  CLOSED                                           CLOSED

  2.  SYN-SENT     --> <SEQ=100><CTL=SYN>              ...

  3.  SYN-RECEIVED <-- <SEQ=300><CTL=SYN>              <-- SYN-SENT

  4.               ... <SEQ=100><CTL=SYN>              --> SYN-RECEIVED

  5.  SYN-RECEIVED --> <SEQ=100><ACK=301><CTL=SYN,ACK> ...

  6.  ESTABLISHED  <-- <SEQ=300><ACK=101><CTL=SYN,ACK> <-- SYN-RECEIVED

  7.               ... <SEQ=101><ACK=301><CTL=ACK>     --> ESTABLISHED

                Simultaneous Connection Synchronization

                               Figure 8.

Every stateful firewall supports this. All you need to communicate off-band is IP addresses and ports.

Giefo6ah

قبل 7 أشهرdiscuss

You should probably check where Finland is in a map before talking about hard to defend borders…

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