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Comment Re:claims (Score 1) 37

Efficiency is based on differences in energy that are economically accessible, not on some rambling theories in a newline-free paragraph.

You can access room temperature. You can' economically access the blackness of outer space from the earth's surface. Likewise, you can access the negative terminal on your battery, but not some static charge in the upper atmosphere.

You pump X amount of energy into a heat engine, it expels that energy to an accessible exhaust, and typically 70 to 95 percent of that energy is *not* converted to work. You pump X amount of energy into a battery, it dumps that energy through a motor to its negative terminal, and only 5 to 10 percent of that energy is not converted to work. That's the only way to practically analyze the situation.

We could also all have infinite free energy if we could access the levels below the zero point energy in the quantum fields. One little problem: that's not accessible either.

Comment Re:Renewable fuels? (Score 1) 83

Catch up to the Chinese on battery tech? They don't have any special battery tech.

Every battery company of note has proprietary electrolyte. The differences between one battery chemistry and another can be significant.

There's nothing special about Chinese EVs components, they're basically the same stuff everyone else is making their EVs out of.

Most of them are using Chinese batteries.

Comment Re:No ECC? (Score 1) 46

If you want a good example of how quickly these supposedly simple systems can get complicated, look into the CAN bus CRC bug.

It's not simple to figure out what you're talking about, a search doesn't return anything obvious through the flurry of marketing content.

This fault is present on EVERY system that uses the CAN bus

It applies to every CAN standard? There's like five of them.

basically any vehicle since the 1990s

Since after the 1990s, you mean? While there were a few CAN vehicles in the 1990s, it didn't really become popular until the 2000s because the interface chips were still relatively expensive.

Comment Re:What's wrong with an accounting trick or two? (Score 1) 10

Most of them aren't video cards as they don't have video output. A DAC and ports cost money that you don't need to spend to run LLMs. The other uses for these cards are mostly scientific, and there's not enough money in that to justify owning them. Perhaps the AI bubble crashing will lead to a push towards some kind of crypto still efficiently mined with GPGPUs. Eew.

Comment Re: Trump will solve this problem (Score 1) 83

Time for the US to nationalise all things vehicle. Registration and taxes. Emissions and smog checks. Safety inspections. Dealership laws and regulations. Driver licensing (including for trucks, busses etc). Road rules. The lot.

Fuck that.

I want the govt more OUT of my life, I dont want to give them more pathways into my life....

Comment Re:even if they succeed it'll suck (Score 1) 31

There are 3 wheel cars on the roads now.

Yes, and they suck now.

Motorcycles are all over and often driven by morons; those things are death traps without any other cars on the road.

Generally agreed. They are also slow in common real-world driving scenarios, e.g. on twisty roads. You can't ride them at 10/10 in case you find a little patch of sand or oil as you will then die. I have been stuck behind sportbikes and superbikes in a 240SX with a stock motor a bunch of times, the motorcycles probably have 4 times the power to weight ratio but not enough traction. Also if you lose the front tire at speed you will likely die.

Aptera wants to create commuting vehicles that will be in the crush of traffic going 70+, and can lose pressure in just one tire and end up with just two left which don't naturally track straight. It's an insane proposition right on the face of it.

Comment Re:I still write about 15 checks a year... (Score 1) 135

Theoretical scenario, no?

Yes of course, but realistic in that skimming fraud is still occurring and it is still only really viable when involving the magstrip.

Going that route, the attacker can fill the whole damn card slot with epoxy, and no card, be it magnetic stripe or chip, can be inserted at all.

If you're doing an attack it's beneficial to have it not be noticed. Also most readers I have used have two different slots- an insert and leave one for the chip, and a slide through one for the strip.

Comment Re:claims (Score 4, Insightful) 37

For the example in TFS of 200F water and assuming room temperature exhaust, Mr. Carnot says that the max possible efficiency is less than 20%. Any real world engine, including this one, probably ends up at a low-to-mid single digit percent efficiency. IOW, the vast majority of the heat would still be wasted.

The operator of the facility generating the waste heat might get more energy savings at lower cost by tweaking their processes to be a few percent more efficient in the first place, instead of trying to recover this low-grade energy source with an elaborate engine and plumbing.

Comment Re:Not going to happen anytime soon (Score 1) 135

It's too easy and they refuse to change.

It's not just "easy". Fax is as secure as the phone network we pretend is secure, so if you act on a fax which appears to come from a specific phone number then you have some level of legal protection from liability. If you use a website or email then you are only as protected from liability as your identity verification system.

My monthly bank payments are electronic, but a few don't have bank account destinations, so it gets done via the bank's paper check service.

If I need to deposit a check, I take a photo of it with my cellphone using the bank's app and it gets processed just fine. The MICR font is highly OCRable, so as long as what else is written/printed on it is legible, everything works well. Even if a human has to review it because it was handwritten, they will only have to briefly glance at most checks. The only thing I actually write checks for any more is my rent. The paper check costs me very little and they cost nothing to deposit on the other end. I think the landlord is depositing them in person, because they seem to do them two or so at a time.

Comment Re:I still write about 15 checks a year... (Score 1) 135

E.g. Create a system to digitally scan a shared thing describing a transfer, but instead of using a standard QR code, keep using cheques.

You appear to have not read anything above your comment. I can't do a QR code by hand. I need a printer to produce one. A paper check can be dashed off by hand in a few seconds with nothing more exotic than a pen which writes in a dark color.

Or Adopt a system that finally eliminates the use of unsecured magnetic stripes on credit cards, but then keep the completely unsecure signature for verification.

We haven't even eliminated magstrips. We still have them around for backup. An attacker can disable a chip reader by making a special card that applies epoxy to the contacts when it's inserted, which you can do with e.g. a dremel, forcing subsequent users to fall back to the strip.

It's like a competition to see how close they can get to a good idea while still fucking up the implementation.

That's the US for you. Electoral college, scotus with no term limits, yada yada.

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