AI is making it wronger.
Don’t worry, general intelligence will be here soon making it the most wrongerest in ways we can’t even fathom today.
Instead of these philosophical musings, I think physics should be questioning WHY the standard model is as it is, what physics could be under the model to give us its "elementary" particles.
The problem is the universe does not owe us an explanation, and Godels theorem proves there are truths within a system of rules that can’t be explained by or derived from that system of rules. Each second, new light from the edge of the visible universe horizon reaches us, but even if we traveled back along that line at the speed of light wouldn’t ever be able to reach that point due to the expansion of the universe so it’s clear there are vast regions hidden from view and kept from experiment forever. At some point we just have to accept the ridiculous accuracy of the math as the deepest understanding possible.
They are susceptible to "prompt injection attack".
Kids these days, I was doing prompt injection attacks before they were cool. Why 20 years ago I was around my friends 3 year old who was being watched by a friend and I asked “What does daddy say in the car?”
I don't mind calling this stuff "artificial intelligence." Artificial means "man-made" but it also means "fake." Like artificial turf, it's useful, perhaps even preferable, in some situations. But it doesn't work everywhere, and you wouldn't want it everywhere anyway, because that would just be gross.
The hilarious thing is artificial used to mean made by skilled labor, clever and ingenious, and implied it was good. This is likely because people in the 1800s were exposed to a bit too much natural and lost the taste for it.
Followed by a 5600 word Slashdot summary.
If only we had some kind of automated or even manual system to scan and summarize it in a concise way.
I'm sure someone already committed multiple felonies would be deterred by that possibility.
No one cares about FCC rules, upwards of 80% of the companies I’ve worked at, or who have done business with the companies I’ve worked at, who use radio gear break the rules. Not jamming WiFi to commit theft though, but things like attaching a high gain parabolic antenna to a modem who is only FCC licensed for a standard gain quarter wave radially symmetrical antenna which violates the energy density rules. Half of them didn’t even know they were breaking the law and I almost can’t blame them because virtually no one gets in trouble for it.
You definitionally can not use any of the energy at 300C because that's your rejection temperature. You're not "using 100% of the heat energy you paid for" not only because you did not pay for the ambient heat, you have no mechanism in this scenario to move it to a lower temperature reservoir (and extract work from it) because it's already the lowest temperature in your system - by definition.
Yes, but exergy is integral to mechanical engineering specifically because it’s useful and informative to look at it this way. Your thermal cycle starts at ambient, has a high temperature reservoir to drive heat flow, does work converting the kinetic energy of the thermal system to useful work lowering the temperature, and returns to ambient at the starting position. Exergy, reduced to a grade school level of understanding, is specifically understood from ambient just as if your ground in an electrical system is actually some voltage. Heat flow never passes to absolute zero at any point, nor does current flow to ground, rather both remain pegged to the nonzero reference state.
So yeah I guess "If you change the reality of the situation you can get different results" is technically true, but means nothing.
False. This has been the correct take for process efficiency going back 150 years and has been coined exergy for 75ish years. It’s actually integral to understanding thermal energy systems confined to a non zero ground state just like we have on earth. Go back up and follow the exergy link to Wikipedia or if you must, use a llm and ask it to describe exergy to you but just know you may have to change the prompt a few times to be sure you’re not being fed false information as it looks like you don’t understand the answer.
Understanding that all voltages are relative, and that it makes no sense to use the average voltage between the ionosphere and the Earth's surface when evaluating anything other than discussing the voltage between the ionosphere and the Earths surface, is also something one should expect from someone with an advanced engineering degree.
This was my entire point but no one seems to be able to understand. If you are familiar with electrical systems think of the atmosphere as a 200,000 battery (or more accurately capacitance) with a low value of held charge and a greater than megaohm internal resistance. The “ground” which laypeople think of as zero volts is anything but, you can measure the voltage over distance with a sufficiently high impedance volt meter, there are many science tutorials demonstrating this and even YouTube videos, it’s well established fact the earth acts as a giant capacitor with a net charge of zero volts with respect to the universe.
None of that is relevant here though, because you' don't use Carnot efficiency to describe something not operating with the flow of heat energy.
False. The grade school level understanding math is identical, it’s called thermal resistance for a reason, if you understand the math for one system you understand the math for both. Even going to university level understanding the differential equations for mechanical systems have their mathematically equivalent electrical systems, in fact the family of differential equations applies across all kinds of physical systems, that’s why they are taught that way. It’s not only accurate, it’s elegant.
Well no, because Carnot efficiency is a well established principle of thermodynamics - a direct consequence of the second law - that actually works in both theory and practice, and the electric car thing is some delusional bullshit you came up with. Big difference.
Carnot efficiency is indeed correct in absolute terms but it being the sole thing the vast majority understand creates a false impression of efficiency, it leads people to think thermal processes cannot be efficient in terms of what you pay for and what you get in return, just look at this thread. If you understand electrical systems it’s just as I’ve described above. Our ground isn’t actually true neutral with respect to the universe and it does not matter because it’s the relative efficiency of the system, just like it’s the most informative to understand our thermal ground state isn’t actually absolute zero. The math is exactly the same.
Efficiency is based on differences in energy that are economically accessible, not on some rambling theories in a newline-free paragraph.
Carnot efficiency is based on absolute efficiency, not economical efficiency. Exergy is a mechanical engineering principle of relative efficiency or process efficiency with respect to ambient temperature though I understand it is a bit arcane if you don’t have a degree. I have a masters in mechanical engineering and have defended the exergy approach in a university at the graduate level to a company in front of three professors of mechanical engineering as well as using it at my job.
You can access room temperature. You can' economically access the blackness of outer space from the earth's surface.
You cannot access the coldness of space, even on a clear night with a low resistance path or the surface temperature of the earth would be hundreds of degrees cooler and we would not have a climate as we know it. If you read the link I provided it explains why the power density of dark panels is “modest”
Likewise, you can access the negative terminal on your battery, but not some static charge in the upper atmosphere.
read above again, that was my point.
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.
disambiguate because an internal combustion energy benefits from a greater amount of oxygen entering the engine due to the colder and denser air whereas a pure heat engine like a sterling engine does not benefit from greater fuel concentration. Considering what’s important here is the financial aspect, process efficiency is what is important and the total amount of power/energy and not Carnot or absolute efficiency. You don’t pay for the ambient thermal bath and it’s insulated from space by a high thermal resistance barrier, the atmosphere or we would all be frozen.
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.
Yes, that’s the point. Instead of absolute neutrality (which does exist as the net charge on the universe is zero) it’s with respect to ground, you even have a metal rod inserted deep into the earth near your EVSE and it makes no sense to base your battery system efficiency with respect to the absolute, current can’t even flow because the atmosphere is highly insulating which is the point.
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.
Thats conjecture, not cold hard measured fact like the surface of the earth being at hundreds of thousands of volts with respect to the universe or the cold of space being close to absolute zero. We don’t have easy free energy from the earth at 300k to space at 2k because even 10w/square meter is difficult to achieve from the ground. Conversely, when you are in a heat bath at 300k (or whatever ambient is on earth at your location) without the ability for heat to readily flow to space because of the optical/thermal properties of the atmosphere makes far more sense to view it from a relative process efficiency. At least try to read the Wikipedia entry on exergy before you call it crackpot when it’s been a well understood engineering principle for a century.
UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. -- Doug Gwyn