Plutoberth
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3 months ago
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on: 40 percent of fMRI signals do not correspond to actual brain activity
I'm not sure I understand. Wouldn't any prediction result above statistical random (in the image mind reading study) be significant? If the study was performed correctly I don't really need to know much about fMRI to tell whether it's an interesting result or not.
Plutoberth
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8 months ago
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on: NIST ion clock sets new record for most accurate clock
I don't understand. Wouldn't it only be possible to find out by comparing two identical clocks that were at different altitudes for some larger number of ticks, allowing you to then compare the elapsed ticks?
How would you conduct such an experiment?
My mental model is that I have a black box that outputs an electrical signal every tick, and then maybe we could just figure out which clock ticked first with a simple circuit. But that seems like we would need to sync them, and that it's fundamentally wrong due to the fact that the information of the tick is also subject to the speed of light. I don't know much beyond high school physics, fwiw.
Plutoberth
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1 year ago
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on: Apple Passwords’ generated strong password format
So the user remains at risk in the time between the leak and the time the company discovers it and resets all passwords, which could be months. It might not really be relevant for most sites and for most users, and you might argue that if the hash database is compromised you have other things to worry about, but it's a something to consider.
Plutoberth
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3 years ago
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on: The Mystery of 355/113 (2010)
But it'll be wrong. 355/113 is only useful up to n digits, not infinitely, and GP is saying that n is as big as the number of digits in "355/113".
Plutoberth
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3 years ago
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on: DALL-E Chess in Jungle and Dunes
Not OP, but I generated over 150 images using DALL-E 2. Results in the quality of the images in the gallery are very common. Usually, for prompts as simple as this most of the output images (there are 4) look as good or better.
Plutoberth
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3 years ago
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on: Permissive forwarding rule leads to unintentional exposure of containers (2021)
172.16.0.0/12 is a private subnet. This means that it's addresses are relevant only within a local network, and never over the internet. If you try to send a packet to an address within that subnet, layer 3 devices (i.e. routers) on the internet will drop it.
Plutoberth
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5 years ago
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on: How I cut GTA Online loading times by 70%
If it was that way for a few months and then fixed... still pretty shoddy but sure. However, it has been that way for YEARS, and is one of the most common complaints among players. I wonder how much of the remaining loading time could actually be shaved off if someone with the source code took a crack at it.
Plutoberth
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5 years ago
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on: Starlink is now Accepting General Pre-orders
Right - thanks for the correction.
Plutoberth
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5 years ago
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on: Perseverance Rover lands on Mars [video]
It GTFO with its remaining fuel and then crash lands. Going back to orbit would require enormous amounts of fuel.
Plutoberth
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5 years ago
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on: Starlink is now Accepting General Pre-orders
Starlink roughly orbits at 1200km. The most common orbit for internet sats is geostationary orbit, which means that the satellite is stationary with regards to an observer on Earth. It works because a satellite on a circular orbit at that height moves at the same speed as the rotation of Earth.
This way you can have a simple, pointed antenna and not an obscenely expensive phased array like Starlink. That being said, GEO is only 36000km,so I'm not sure where the "60 times" figure comes from...
Plutoberth
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5 years ago
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on: Hardkernel adds 4x 2.5Gbps to H2
This board has four 2.5G ports, not four 10G ports, so the 16G bandwidth for four PCie 2.0 lanes is more than enough.
Plutoberth
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5 years ago
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on: Journalists Hacked with Suspected NSO Group iMessage ‘Zero-Click’ Exploit
Failed exploits, especially kernel-level ones, will result in higher system instability. I'm aware of at least one company (ZecOps) that specializes in detecting exploitations using crash analysis.
Plutoberth
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5 years ago
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on: Linux kernel heap quarantine versus use-after-free exploits
We're talking about different security models. Whereas anti-cheat companies seek to prevent code execution or introspection in a certain context (the game) by a user that already has full privileges over the machine, other mitigations seek to prevent privilege escalation or initial access. For example (simplification), a remote exploit that relies on a specific address to work would now have to find an additional information leak. Similarly, code running in usermode cannot simply* know the addresses of objects in the kernel.
* In practice this isn't really true, and there are many ways to bypass KASLR
