pfdietz

23 ms·

571.
by pfdietz 5mo ago
A new coal-fired power plant hasn't come online in the US since 2013, IIRC.
572.
by pfdietz 5mo ago
That's what mutation testing is.
573.
by pfdietz 5mo ago
Won't mechanical brakes still be needed? Regenerative braking only goes so far, and needs a backup.
574.
by pfdietz 5mo ago
The temperature involved for this is well above that needed for production of electron-positron pairs, so one may ask why that doesn't happen. I think it's because the cores of such stars are dense enough the electrons are degene
575.
by pfdietz 5mo ago
Wouldn't putting them in the wheel increase unsprung mass, which would degrade the feel of the car?
576.
by pfdietz 5mo ago
Bonus points if you have to heat that crap you call fuel before you inject it into the massive cylinder.
577.
by pfdietz 5mo ago
For more than 20 years I've been doing automatic test input reduction as part of testing Common Lisp compilers. The reduction is on randomly generated inputs, but they are structured in such a way that reduction always gives a valid p
578.
by pfdietz 5mo ago
It's my understanding the general mechanism of core collapse involves the adiabatic constant of the material, gamma. This is the exponent in the relation P V^(gamma) = constant. For a normal, non-relativistic gas in which the particl
579.
by pfdietz 5mo ago
* Inadequate exposure to UV leading to depressed vitamin D levels.
580.
by pfdietz 5mo ago
Almost all the pesticides you eat are naturally produced by plants, so I dispute your assertion. Plant extracts light up the Ames test for mutagens.
581.
by pfdietz 5mo ago
It feels like it's time to start turning the screws on regulation of software engineering. If productivity is really getting better, regulation can force that productivity to go into increasing software quality.
582.
by pfdietz 5mo ago
This reminds me of a poem in Analog Yearbook 2 (1978) by Jeff Rovin, with the title "The Horse That Jack Built". Science fiction becomes science fact every day.
583.
by pfdietz 5mo ago
They also have a large stockpile of reactor grade plutonium. Not the best material for bombs, but workable.
584.
by pfdietz 5mo ago
In this context, A is a set, and A + A represents the set of all sums of pairs of elements drawn from A. The paper doesn't use A^2, but rather |A|^2, which is ordinary squaring of an integer. It does use AA, which is the set of produc
585.
by pfdietz 5mo ago
> babies are not needed for population growth Of course they are, on a global scale. There is no other process than birth that can increase global population.
586.
by pfdietz 5mo ago
MIT had a spin-out company some years ago doing HDH (Humidification-Dehumidification) desalination. In thermal cycles, the problem has been in the condensation step. If there is a carrier gas present this inhibits heat/mass transfer a
587.
by pfdietz 5mo ago
This one seems more well founded than some. AI by companies is commerce, no? And uniform regulation of commerce is under the clause.
588.
by pfdietz 5mo ago
Yes, AI regulation is squarely in the wheelhouse of the Commerce Clause.
589.
by pfdietz 5mo ago
The issue holding back steel recycling is contamination, most notably with copper. This forces recycled steel to be "downcycled" into lower value uses like rebar, or the recycled metal to be diluted with freshly reduced metal. A
590.
by pfdietz 5mo ago
We can analyze this issue with historical weather data, and it turns out it's tractable. Using solar + wind + batteries + non-fossil fuel turbines enables 365/24/7 "synthetic baseload", 100% renewable. See https:&
591.
by pfdietz 5mo ago
The solar farm powering BEVs also uses maybe 1/200th the area of the equivalent bioethanol farm powering ICVs.
592.
by pfdietz 5mo ago
What do you have against farmers using their land as they see fit? Are you against property rights? What other freedoms do you oppose?
593.
by pfdietz 5mo ago
The interesting thing here is he's explaining how the new idea that the AI came up with for the unit distance problem was then applied by a group of human mathematicians to refute the sum-product conjecture. One result is not a conseq
594.
by pfdietz 5mo ago
Another situation that occurs in nuclear weapons and in reactors is the scattering of energetic photons off materials. This process is inherently relativistic when the photons have energies comparable to or greater than the rest energy of
595.
by pfdietz 5mo ago
Calculating the energy yield of a fission event is done by comparing the masses of the initial and final states. The difference is about 1/5th the mass of a nucleon.
596.
by pfdietz 5mo ago
It's not that it's incomprehensible, it's that it appears to be wrong.
597.
by pfdietz 5mo ago
> much more interesting than the problem’s elementary statement might lead one to expect This is reinforced by the immediate (human) use of the idea to resolve in the negative another significant problem, the sum-product conjecture on re
598.
by pfdietz 5mo ago
The atomic bomb certainly had a cursory dependence on special relativity. E = mc^2, you know. Klystrons were used in WW2, and the beam current of a klystron scales as the beam voltage to the 3/2 power (due to space charge limits). Mo
599.
by pfdietz 5mo ago
I think it's going to reduce the friction of exploring new areas in math, and that we're going to see a golden age of math unlike anything seen before.
600.
by pfdietz 5mo ago
It will drive math journals to require formalization of the proofs in the supplemental material.

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