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Messages - Trekkin

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136
That structured data could then be used to make said models

This is the definition of zeteticism, not empiricism. This is literally not science. Thinking this is how science works is how Flat Earthers happen.


137
Oh, the research would certainly be useful for predicting the behavioral trends of students, for sure. :P

The behavioral sciences department would eat it up like candy.  (Simply because the model does not produce sentience in a machine, does not mean the model is without purpose.)

Aww crud, really? I guess I'd better stop throwing protein folds at our AIs and expecting them to spontaneously write me a sonnet about the meaning of life, then. /s

Seriously, though, there's no proposed model here. All we have is a suggestion that we load data into an AI in order to learn about it. My point was that AI doesn't operate with the transparency necessary for that to be a productive line of inquiry.

EDIT: PCA could, maybe?

138
There's a more fundamental problem with this proposal, though: there's not a universal way to convert a trained AI's weight sets into a useful set of rules.

AIs are a way to encode trends in data sets into a common architecture and express the gestalt probability that a given set conforms to those trends. Trying to extract those trends themselves ex post facto isn't generally productive.

139
Cool. This means that the force keeping a bacterium on a human is stronger than the force keeping a human to Earth. I used about 45 kg since thst was about my weight, using the average for all humans makes much more sense.

Bacteria also aren't that far off from the length/mass scale where inertia stops being a significant determinant of the mechanical behavior of a system under physiological conditions, so gravity doesn't really matter once something that small is in fluid and acted on by Brownian motion. Think about how you can launch yourself off the wall of a swimming pool, for example, and just drift for a while through the water in whatever direction you pushed. Now imagine trying to do the same thing in a ball pit. Now imagine how hard it would be if all the balls were baseballs and actively jumping around, and you'll have some idea of why mass and inertia and gravity don't have much to do with your skin flora. Intermolecular interactions do, though.

140
At a guess, r was set to the distance between surfaces rather than centers of mass.

I went ahead and did the human to bacterium calculation assuming a human was a homogeneous sphere with radius 24 cm (based on the average human mass of 62 kg and assuming we're as dense as water), and I got a gravitational force of 5.2E-23 N between the human and an individual bacterium. For the entire bacterial population on an average human (assuming they were just one 200-gram mass of sludge), I got a total force of 5.2E-08 N. That seems reasonable to me.

141
General Discussion / Re: Things that made you go "WTF?" today o_O
« on: December 03, 2019, 11:10:12 pm »
Oh, really? Well, that clears up a lot, since I was confused how it worked exactly because radioactive decay is exponential, not linear.

Well, it doesn't help that "atomic clock" is something of a misnomer. We talk about most clocks according to the oscillation they use to actually measure time; a pendulum clock, for example, physically swings a pendulum back and forth to measure out some consistent period of time. A quartz watch uses the piezoelectric effect to physically oscillate quartz. So, when we talk about atomic clocks, it's totally reasonable to assume the atoms are somehow oscillating in a way that we read out directly, and decay makes sense in that context.

What an atomic clock actually does, though, is use those transitions to tune another oscillator in a feedback loop, usually (in modern cesium and rubidium clocks) by using that oscillator to drive a maser at the frequency at which they are most readily excited and measuring either the absorption of energy or the excitation through a variety of methods. If you take the pendulum out of a pendulum clock, it stops; if you take the cesium out of a cesium clock, it drifts.

So an atomic clock is really an atomic drift corrected clock, if you will, in which case the use of hyperfine transitions makes a lot more sense.

142
General Discussion / Re: Things that made you go "WTF?" today o_O
« on: December 03, 2019, 10:19:55 pm »
maybe molecular decay is a better unit of measurement?

Yes. It's what we use for extreme-precision atomic clocks already, for stock exchanges etc. Decay of cesium atoms.

Well, no; the definition of the second and modern atomic clocks are based on hyperfine structural transitions, not decay. If it were based on decay, they couldn't define it using 133Cs, since it's stable.

143
General Discussion / Re: Things that made you go "WTF?" today o_O
« on: December 03, 2019, 05:13:00 pm »
Bah. Just use POSIX time. To Hell with 12-hour clocks, 24-hour clocks, DST, leap seconds, time zones, minutes, hours, days, etc. Just one number that is what time it is, increments by 1 every second, and will keep doing so at that rate forever.  Simple, easy, unambiguous, and totally unrelated to arbitrary astronomical phenomena and all the complexity they add; if for some reason you care where the Sun is, you can just do the modular arithmetic to figure it out.

145
General Discussion / Re: AmeriPol thread
« on: December 01, 2019, 03:39:01 pm »
We're also assuming people are acting rationally. If there were a government program to help people purchase eco-friendly vehicles, you know the day after launch there would be a hundred thousand Youtube videos with some wheezing Boomer in aviators and camo pants screaming about how he bought one of those commie cuckmobiles just to #triggerthelibs by filling it with gasoline and endangered species, then shooting it until it catches fire. Just like they did with the ex-NRA stuff. It seems destroying their own things is just...how conservatives express malaise now.

146
General Discussion / Re: AmeriPol thread
« on: December 01, 2019, 02:14:08 pm »
Quote from: McTraveller
For cars, people are going to buy newly manufactured cars at about a steady pace anyway, so there's not much "extra" waste for people being encouraged to buy "green" vehicles over "non-green."  I haven't seen good numbers on how the estimated recycling/replacement impact of a battery compares to the impact of continuous ICE usage.

I think this is where we got some wires crossed, because I certainly didn't mean to sound defeatist. I was trying to point out the major problem around which incentives of this sort need to work: how do we make it favorable for people to replace old cars with new electric cars (for example) without making it favorable for people to replace their new cars with electric cars or buying cars they don't need? The reason I bring up manufacturing costs is because if you simply make a thing cheaper, people will buy more of it. They won't necessarily buy more of it instead of what they were going to buy anyway, at least not in aggregate, so we do have to ask how we're calibrating to incentive to make it just a little better than the alternative without being so much better that, say, people buy solar in a region with little sun or buy up a crapload of LED bulbs they never use because hey, they're cheap, or buy a new electric car much earlier than they otherwise would. In the case of vehicles in particular, you really don't want to make them so affordable that people stop carpooling or taking the bus because they can have a car now.

147
General Discussion / Re: AmeriPol thread
« on: December 01, 2019, 08:38:44 am »
I just had a thought - instead of subsidies or tax rebates, why doesn't the government provide zero-interest loans for green tech? This would be both better for tax revenue and would get more people into "green tech" faster.  The government should do things that aren't commercially viable: because the benefits of "green tech" are diffuse, no private company will offer cheap (enough) loans for it because they can't get enough direct benefit.  But the "government" gets "all" of the diffuse benefit, so should be willing to do this.

What green technologies in particular are you thinking of, though? All cynicism about the government aside, solar panels and electric cars and LED lightbulbs and things have a significant impact on the environment to manufacture, so spurring a lot of people to install them spontaneously might actually end up at a net loss if you factor in the waste from replacing whatever less green equivalent still had life in it.

148
General Discussion / Re: Things that made you go "WTF?" today o_O
« on: December 01, 2019, 12:44:51 am »
Also, since I adapted this one from a recipe online, I now know that the first soap batch likely has an excess of lye. Oops. On that note, how do I calculate the amount of lye (NaOH) needed to make some amount of soap?

Well, you can obtain saponification values for a given type of oil from the manufacturer; it will usually be either a mass ratio of oil to KOH or an outright molar ratio, but either way you'll need to convert for lye.

Alternatively, have you thought about just testing the pH directly? Depending on what oils you're using or if you want to try getting into blended oil, it can be more reliable to just check the pH than to try to calculate it ahead of time (since actual oil composition can vary), and litmus paper is pretty cheap. Just wet the soap, set the paper on it, and you know you used too much lye if the pH exceeds about 10.

149
General Discussion / Re: AmeriPol thread
« on: December 01, 2019, 12:34:43 am »

That's why I don't like seeing 100% goals.  Everyone knows it isn't going to be accomplished, so why not have real, specific policy planks instead?  So everyone knows what to expect, and can work with the upcoming problems, instead of being held responsable[sic] for failure to meet an unattainable goal.

Because to every company in America, "working with upcoming problems" means "weaseling out of our obligations to everyone but our shareholders." If you propose a carbon tax, that means paying lobbyists to shoehorn in an exception for their specific industry or getting the state to give them a tax break to offset it or any of the other games companies play with money -- or just flat-out ignoring it and daring someone to sue about it. If you propose a <100% reduction in nonrenewable power generation, that means establishing that their particular  concern should be in the nonrenewable fraction for whatever reason, or that the percentage should be dragged down to meet their needs. Historically, what is "achievable" has been twisted by conservatives to mean what doesn't need them to change anything, so the less wiggle room one starts with, the better.

Then, too, specific policy planks aren't compatible with American policy. Debating about things we don't understand is almost a sport, here, as is demanding to be taken seriously for no good reason. If you give people a target number like 95%, you will get a hundred million armchair experts on Facebook parroting the same factoids about why it should be 90% or 99% or 0% or my ideological opponents should die in a fire%; if you give them actual policy proposals, they will find or invent some consequence they disagree with or mine a quote they think sounds dumb and bikeshed about it just for the sake of sounding impressive until the news cycle turns over.

Don't think of the 100% proposal as a law; America doesn't do those anymore. Think of it as a slogan to rally the mob behind our next dictator, something short and memeable to chant in the civil war to come. It serves well enough as that.

150
General Discussion / Re: [Poi~] Poi is once again permitted (Happy thread)
« on: November 30, 2019, 06:04:42 pm »
To be honest, the one piece of advice I have gotten over the years from well-to-do people, under various circumstances and pretenses, is to maintain a healthy religious presence.  Most say I dont need to believe, only pay lipservice.

I agree with most of them that being nominally religious is worth the time.  Socially its a good look.

Subject to the usual disclaimer about tailoring your image to your social circle, sure. My case is apparently the inverse of yours: the folks who wash my glassware and maintain my robots go to church weekly and a few wear religious symbols, but the people who work with me rather than for me, not so much.

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