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Out_of_Characte

787 karma · joined August 11, 2019

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Out_of_Characte··on Measuring energy usage: regular code vs. SIMD code
Sadly I wouldn't know enough about microarchitecture to understand whether nanocode would actually be a benefit. surely if CPU's became big and complex enough there would be a benefit to have hierarchical translations down to micro-ops and smaller subdivisions for execution units. What you're describing seems to come close to FPGA's. The possibility to write very complex sequences to pipeline different payloads trough the system while maintaining proper state. Though I think the economical solution might be more boring, the intel ME and AMD PSP hardware is probaly responsible for alot of management of state that could flush or change how instructions are executed with very basic logic.

If esoteric hardware interests you I would recommend IBM system/360 as reading material. Sadly hardware like that has fallen out of fashion and we've been stuck with the x86 and arm dichotomy. if anyone else has interesting/newer non-x86 hardware to link I'm more than happy to delve into that.

Out_of_Characte··on Realtime telemetry from ISS internal components
Not an expert but I think its possible, the problem is that the gyroscope alone wouldn't be sufficient. When the gyro rotates once, the massive spacecraft will obviously have rotated exactly once relative to the gyroscope. However if you could track the space station's rotation relative to an independend stationary observer in space (lets say an array of pulsar data), then you could count the amount of turns of both the gyro and the spacestation relative to the background of space. Then the amount of turns of the gyro times the mass of the gyro would give you the mass of the space station minus the independend floating objects. Meaning you'll need to add the mass of the gyro itself as well.

Please correct me if i'm missing something obvious. This should work right?

Out_of_Characte··on Why it's so challenging to land upright on the moon
Generally, a good spacecraft has the least amount of mass possible on fuel/engines as compared to payload (the useful part of a mission) which is why center of mass either migrates upward or stays mostly neutral.
Out_of_Characte··on Waymo recalls software after two self-driving cars hit the same truck
A car changing lanes does indeed remove stopping distance. But thats also something human drivers are naturally more capable of understanding than waymo. It shouldn't have mattered where a vehicle is on the road. Any human is able to predict if a weirdly loaded vehicle making a turn has a chance of invading their lane and/or stopping distance. Its a complex problem for sure but that also shows that you need absolute proof that the software is able to generalise the problem. Especially if you want self driving cars to respect flow of traffic over stopping distance.

Even if your software is as good as it can be, I doubt you'll be able to get them to recognise how to resolve deadlocks. Which would also involve severe hindrance to emergency vehicles.

Out_of_Characte··on Measuring energy usage: regular code vs. SIMD code
Forgive me if i'm misunderstanding, CPU's have micro-op caches that will bypass decoding instructions altogether if its in that cache. This means that variable length instructions will be decoded to a micro-op in the cpu and will get reused for as long as you have cache hits. Which does mean you"ll have ghost performance penalties if your code/gcc doesn't respect the size and limitations of hidden caches. Otherwise you can pretend that any instruction length gets shortened to its micro-op.
Out_of_Characte··on Waymo recalls software after two self-driving cars hit the same truck
My brakes respond immediatly,for all intents and purposes as a human with a reaction time. I'm at fault if the person in front of me stops and I dont have the stopping distance to avoid a collision.

I get that self driving software is difficult. But theres no excuse for this type of accident.

Out_of_Characte··on Scientists discover 100 to 1000 times more plastics in bottled water
I did not know that, I've mistakenly assumed that due to the risk of tin poisoning when opening the can.
Out_of_Characte··on Scientists discover 100 to 1000 times more plastics in bottled water
AFAIK this depends on the acidity of the drink since carbonated drinks will destroy the can otherwise. Canned food has no such thing.
Out_of_Characte··on Scientists discover 100 to 1000 times more plastics in bottled water
>I drink 3-4L a day

I dont want to doubt you but from my own experience that seems insane. Is there a medical/enviromental reason for? Do you take salt tablets as well?

I drink a single glass of water in the morning, 200ml and I have a .7L glass bottle because I dislike the way plastic tastes. But thats a hard maximum that I could tolerate drinking.

I've also had blood tests done that do not show any dehydration in the slightest so I'm just curious why/how anyone could drink that much water without poisoning themselves.

Out_of_Characte··on Breakthrough in 'detonating' hypersonic propulsion
Curious why they mention mach limits with their ramjet/rde I've seen them work under subsonic air conditions. Makes me wonder what the limiting factor is of rde under subsonic speeds. To me,the rde always seemed like the holy grail of propulsion even under subsonic speeds because of the significantly higher exhaust velocity. Something even rocket engines could benefit from due to the better ISP characteristics in low and high atm pressures.
Out_of_Characte··on Electrocaloric material makes refrigerant-free solid-state fridge scalable
It depends on your definition of 'solid state'

hard drives store bits magnetically , ssd's store bits electrically. You could call both solid state if the SSD wasn't specifically named due to its close relation to dram and cache lines that need active power. I would also consider hard drives more solid than ssd's if you tested for how long each could resist entrophy if there was no source of low entrophy.

Out_of_Characte··on Agricultural input shocks affect crop yields more in the high-yielding areas
Even in the hypothetical scenario where all vegetables and meat have shelf lives of a year, it still wouldn't make that much of a difference when it comes to food security. Products with long shelf life are sold with that long shelf life. This does mean that any kind of failed harvest means that those products will either disappear out of the selection or a different formula is used to maintain availability. Companies dont store anything, governments only store rice and grains at most since they are the only economically feasable types. Citicens will actively induce food shortage once there is one.

All you're left with is figuring out how much food is between the harvest and the supermarket. And that's not alot. Demand matches the consumption of citizens and time to market is optimised to be short. This is before considering how unhealthy the most durable foods are since sugar is the main ingredient in all of them, from chips and chocolate to processed cans.

Out_of_Characte··on Agricultural input shocks affect crop yields more in the high-yielding areas
Unlike the economy, food is a zero sum game. Most produce has a limited lifespan, unless you opt to freeze everything, which is not something all consumers desire or buy. This means that most food that leaves the farm must be consumed within a narrow window. Only exporting and importing food from diverse regions will allow you to minimise food waste and therefore have an efficient low-cost market. This also creates countries that are great net exporters.
Out_of_Characte··on Cryptographers solve decades-old privacy problem
How I interpreted this is that you download the google search algorithm, then scan their database over the internet with that algorithm. Which would take ages or millenia depending on how much data google has.

You wouldn't need to download the entire database and there would be alot of uncertainty over which search result you'd actually used.

Out_of_Characte··on Cryptographers solve decades-old privacy problem
Denial of service is still by far the most common tactic, encrypt the data and no one can use it.
Out_of_Characte··on Rogue superintelligence: Inside the mind of OpenAI's chief scientist
Chatgpt's consciousness would be akin to plato's cave. Even if chatgpt were more intelligent, wouldn't it be staring at different shadows?

Given that chatgpt has consciousness, would it be able to break the fourth wall? There seems to be an implicit assumption that it must break that in order to prove its consciousness to us. Maybe that's how AGI will come to be, because we desire to train it that way.

Out_of_Characte··on OpenAI's board has fired Sam Altman
The claim that you cannot have x memories before a certain year is completely false. although unrelyable, children that have certain experiences can remember them.

I would go as far as to say we completely underestimate what children understand and remember because we're the ones that chose to forget.

Out_of_Characte··on Canon Nanoimprint lithography semiconductor manufacturing system (5nm)
My reading comprehension failed me, thank you for finding that image. That explains it alot better
Out_of_Characte··on Canon Nanoimprint lithography semiconductor manufacturing system (5nm)
"In contrast to conventional photolithography equipment, which transfers a circuit pattern by projecting it onto the resist coated wafer, the new product does it by pressing a mask imprinted with the circuit pattern on the resist on the wafer like a stamp"

Etching a wafer is only one step in the process, how do they deposit the metal layer? With lithography you have the resist that can be washed away after deposition.

Out_of_Characte··on FBI warns against using public USB charging ports
This threat is far less dangerous than the threat of automatically connecting to certain free wifi ssid's that could be harmfull to one of the thousands of possibly compromised apps.
Out_of_Characte··on SpaceX no longer taking losses to produce Starlink satellite antennas
Sattelite communication is generally more expensive than cable or cell towers. Though about 70% of the earth is unsuitable for these solutions. Alot of commercial boats are still on very low bandwith connections but could potentially benefit from higher bandwidth if only to make video calls or netflix more available for a similar or higher price. Then there are alot of smaller, private, boats that would benefit from sattelite communication if costs werent prohibitive.
Out_of_Characte··on Scientists use quantum device to slow chemical process by factor of 100B
I'm no expert but my understanding is that the word 'simulation' is a misnomer in this context. A better way to describe what they're trying to do is a proxy system. Effects observed in this proxy system would be used to predict interactions in reality. Whereas simulations are better at describing how real world interactions diverge from our models.
Out_of_Characte··on Naked Mole Rat’s Longevity Gene Gives Mice a Longer Life
Biologic incompatibility isn't as much of a concern. At least not with the modification in the article. Our genes encode a wide variety of proteins and enzymes that differ from person to person. Even people with significantly debilitating mutations havent had trouble conceiving. Even people with extra x or y chromosones do not have to worry about the matter. Though some men do have strange mutations like only being able to conceive girls with their partner.
Out_of_Characte··on Successful room temperature ambient-pressure magnetic levitation of LK-99
AFAIK superconductors are ideal conductors, therefore the electrons will remain in motion unless acted on by a force. So yes.
Out_of_Characte··on Some remarks on possible superconductivity of composition Pb9CuP6O25
Immediate applications for a rtsc would be MRI machines. Those cost between 300k and 500k. They require helium for operation.

A superconductor at room temparature could remove the need for helium or even nitrogen. It could possibly make the machine work with a thermal electric cooler which would drastically lower the upfront cost and the maintenance cost of an MRI. Also, the machine would become smaller which would eliminate the need to roll patients into the machine itself, further reducing costs.

Where a big hospital could only afford one MRI, many small hospitals can now potentially get one for 80k.

I dont know any other existing commercial applications of superconductors.

Out_of_Characte··on Unconfirmed video showing potential LK-99 sample exhibiting the Meissner effect
Look at how tiny the spec is. What would be the most convincing evidence? A resistence meter that basacally touches itself or a spec clearly floating on a magnet without cooling.
Out_of_Characte··on NASA mistakenly severs communication to Voyager 2
Does anyone know how Voyager calibrates their antennas?
Out_of_Characte··on American hard hat jobs have the highest level of open positions ever recorded
Alot of loads they carry can become completely impossible for human physiology to carry by having to extend any weight too far from your body. Or pieces of material that weigh above 150kg. No safety intstruction can prevent guys from hoisting that up on their own if it needs to be done in order to continue working. That in addition to lots of chemicals, sprays, fiberglass and dust in the air makes it a health nightmare.
Out_of_Characte··on PPP fraud history's worst: $200B stolen and blown on fancy cars and beach houses
'likely put back into the economy' is a terrible way of putting it. That wouldn't be a good explanation in front of a judge who sees my fancy car, paid by fraud. It also does not inspire confidence with how the government treats money. Why would I be willing to do honest work if society lives on broken ideals?

If the ppp was feasable, the government would have reserved money for solving these side-effects of their proposal.

Out_of_Characte··on Room temperature, ambient pressure superconductivity – this time for real?
In theory, you could produce this in the medieval era if you had mercury.

https://en.m.wikipedia.org/wiki/Sprengel_pump

Just imagine some society discovering superconductivity on the cusp of even starting a technological revolution.

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