791–800 of 821 posts
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I'm sorry, but you are correct. I made a mistake earlier when I referred to RTRPS as being a flying technology the government has been using for decades. No such technology goes by that name. I apologize for the error.
This still doesn’t make sense
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In the RF world (particularly at mm-wave frequencies), even copper has very non-negligible losses. In most passive circuits conductor loss is the limiting factor of performance. No idea if this material retains the same properties at such frequencies, and is compatible with typical lithography or other fabrication techniques, but it'd be amazing if so.
Particle accelerators sometimes use superconducting niobium resonators at e.g. 1.8K offering a Q of 5e10 at 1.3 GHz. But apparently their surface resistance scales with the square of frequency, unlike the square root in normal copper. So maybe just just t normal conductors like copper, silver, graphene (assuming the latter can be commercially made to surpass silver in RF surface resistance).
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The superconducting effect of LK99 seems to top out at around 150 mA / cm^2. Maybe more research will bear fruit here, but for now we're not looking at HVDC lines.
To my knowledge, that number from the original researchers and no one has yet independently verified it. External researchers have not even begun to purify and test the limits of this material.
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Yes, but the search space is mind boggling.
How so? Just a function of all the different atoms and sub-atomic particles interacting?
The "just a function of" is a non-trivial problem. Given a single set of elements you want to "try out" results in a huge global optimization problem to find the set of stable structures (low energy). When aided by experimental data it becomes a tractable problem.
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It's a mistake to think in terms of the US only. Because unlike China the US doesn't think that way. And if you include the core part of Team America, it's even steven.
Who is the core part of team America? Because the anglosphere doesn’t even it out I don’t think and Western Europe is not unequivocally on our side in US-China industry competition.
The core part defined by long standing military and economic ties is about 1.5 billion people.
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Can you extract work from a constant magnetic field? As I remember my physics education, constant magnetic fields don't do any work, since they apply a force perpendicular to the direction of motion.
I'm not a physicist, but I play with circuitry... two nearby loops of wire are magnetically coupled. If one is a superconductor with some stored current, and the other is a normal conductor with some resistance, then it stands to reason that the supercurrent will burn heat off in the resistive loop.
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paper recycling is profitable without any subsidies at all, and people do sometimes steal paper to recycle it here in argentina there are tens of thousands of people who make a living by recycling, sorting through whatever trash they can get access to in order to find materials with enough resale value to scrape by. they haul plastic sacks or two-wheeled carts all over the metropolitan area, stacking them high with r…
> people do sometimes steal paper to recycle it > they are the cartoneros, because what their carts are usually piled high with is cardboard, cartón Paper, or coardboard? It's unclear whether you're referring to cardboard as paper, because after your assertion the only thing possibly linked to it in the rest of the comment is your references to cardboard. Cardboard is not paper. They share base components, but referr…
there are different kinds of paper, which require different recycling streams; cartoneros will accept some others but not all
your talk about 'losing the thread' makes me think you are playing some kind of game where the objective is not to find out what the truth is but to sound convincing even if what you are saying is false
i am not playing that game. as far as i'm concerned, it's up to you to find out the truth, or not, not up to me to shove it down your throat, though i'm happy to provide relevant information
i am aware that in the usa recycling, even fake recycling, is heavily subsidized. that's why i was providing information about what happens in places where subsidies for recycling are scarce to nonexistent. almost nobody recycles plastic here (except for small programs that are subsidized and do things like recycle polypropylene bottlecaps), and only big operators recycle steel. but paper — specifically the kind of paper that corrugated fiberboard is made of — is abundantly recycled; it's not nearly as remunerative as brass, copper, aluminum, or lead, but it's the bread and butter of the cartoneros because people discard it in much higher volumes
i don't think it pays anywhere close to US$75 per tonne though, maybe a tenth of that
I'm astounded that the MSM seems to be ignoring this ATM. I did a Google news search on LK-99 and saw nothing from major publications. A search on the NYTimes returned an article from 1974.
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The transistor was unequivocally the biggest technological breakthrough since fire
breakthroughs since fire more important than the transistor probably include cooking, agriculture, the wheel, metallurgy, glass, ceramics, the heat engine, mechanisms in general (with things like pulleys, hydraulics, screws, and gears), construction cement (originally lime), math, writing, optics, electricity, chemistry (including things like distillation, the atomic theory, and recrystallization), plumbing, carpentr…