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Cake day: December 18th, 2023

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  • General_Effort@lemmy.worldtoScience Memes@mander.xyzChemistry
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    13 hours ago

    I perceived an uninterrupted stream of fantastic pictures, extraordinary shapes with intense, kaleidoscopic play of colors. After some two hours this condition faded away.

    This was, altogether, a remarkable experience - both in its sudden onset and its extraordinary course. It seemed to have resulted from some external toxic influence; I surmised a connection with the substance I had been working with at the time, lysergic acid diethylamide tartrate. But this led to another question: how had I managed to absorb this material? Because of the known toxicity of ergot substances, I always maintained meticulously neat work habits. Possibly a bit of the LSD solution had contacted my fingertips during crystallization, and a trace of the substance was absorbed through the skin. If LSD-25 had indeed been the cause of this bizarre experience, then it must be a substance of extraordinary potency. There seemed to be only one way of getting to the bottom of this. I decided on a self-experiment.

    Exercising extreme caution, I began the planned series of experiments with the smallest quantity that could be expected to produce some effect, considering the activity of the ergot alkaloids known at the time: namely, 0.25 mg (mg = milligram = one thousandth of a gram) of lysergic acid diethylamide tartrate.

    From LSD: My Problem Child by Albert Hofmann. I will leave it to others to explain all the ways in which this is absolutely hair-raising.


  • In February 1993, the University of Minnesota announced that it would charge licensing fees for the use of its implementation of the Gopher server.[11][9] Users became concerned that fees might also be charged for independent implementations.[12][13] Gopher expansion stagnated, to the advantage of the World Wide Web, to which CERN disclaimed ownership.[14] In September 2000, the University of Minnesota re-licensed its Gopher software under the GNU General Public License.[15]

    https://en.wikipedia.org/wiki/Gopher_(protocol)#Decline

    It’s probably not quite right to call it an open source alternative, though. I don’t think that gopher or anything was established in a monopolistic way, but that was before my time. Besides, the internet was all universities back then.











  • General_Effort@lemmy.worldtoScience Memes@mander.xyzLarge flavored quark
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    4 days ago

    The physicist who named the particle apparently liked to come up with nonsense words in his head. Later, when trying to decide the spelling, he came across a quote by James Joyce and spelled it “Quark”. Unfortunately, the particle rhymes with fork, while the german cheese rhymes with Mark.

    According to his own account he was in the habit of using names like “squeak” and “squork” for peculiar objects, and “quork” (rhyming with pork) came out at the time. Some months later, he came across a line from Joyce’s Finnegans Wake:

    Three quarks for Muster Mark!

    Sure he has not got much of a bark

    And sure any he has it’s all beside the mark.

    The line struck him as appropriate, since the hypothetical particles came in threes, and he adopted Joyce’s spelling for his “quork.” Joyce clearly meant quark to rhyme with Mark, bark, park, and so forth, but Gell-Mann worked out a rationale for his own pronunciation based on the vowel of the word quart: he told researchers at the Oxford English Dictionary that he imagined Joyce’s line “Three quarks for Muster Mark” to be a variation of a pub owner’s call of “Three quarts for Mister Mark.” Joyce himself apparently was thinking of a German word for a dairy product resembling cottage cheese; it is also used as a synonym for quatsch, meaning “trivial nonsense.”

    https://www.merriam-webster.com/wordplay/quark


    However, there is another interpretation of the quote.

    This passage from James Joyce’s Finnegans Wake, part of a scurrilous 13-line poem directed against King Mark, the cuckolded husband in the Tristan legend, has left its mark on modern physics. The poem and the accompanying prose are packed with names of birds and words suggestive of birds, and the poem is a squawk against the king that suggests the cawing of a crow. The word quark comes from the standard English verb quark, meaning “to caw, croak,” and also from the dialectal verb quawk, meaning “to caw, screech like a bird.”

    https://www.ahdictionary.com/word/search.html?q=quark

    This sounds very learned and all, but I can’t find that standard English verb in the dictionary.






  • Insurance is generally for contingencies that are very rare but ruinously expensive. The average cost per person is low, but the cost to the one it happens to is extreme, like a reverse lottery. So it makes sense for a large group of people to pay a little bit of money each month, to pay for the cost to the one. This is how both health and fire insurance work. (Health care is about more than that but that’s a different and less straight-forward story.) So, anyway, that’s why sane people view it that way.

    Historically, the problem with private firefighters was that you had a business that made money when there were major fires. That’s a bad incentive. You get similar bad incentives in health care, too, which is one reason why coverage for some interventions may be denied. Another thing about fires is that they are contagious. They threaten the entire neighborhood. That’s why you have, for example, the CDC in the US. Controlling contagious diseases is not left to private providers.


  • I have no intuition for how hot or bright these trees would be. They certainly would be very different from the sun. The sun is literally incandescent; white-hot glowing. Trees would presumably use a mechanism comparable to glow-worms to generate radiation only in a very narrow frequency band. The fair skin color of elves suggests that they do not come from a high-UV environment.

    Somewhat less than half of the sun’s energy reaches us as visible light (43%). There are a few other factors that might allow the trees to glow brighter than the equatorial sun at noon. Unfortunately, the intensity per area diminishes with the square of the distance, so that doesn’t get us far (no pun intended).

    It would be much better if that world was basically rectangular (with reflective sides and top); basically a terrarium. That would also explain why you would place 2 light sources at 1 end. The length of a long rectangular box would only be limited by absorption of the light. The trees should glow brighter at the top. Plants, animals and structures on the surface, near the trees, are hit with only “mild” power, while the high-intensity light near the top of the box is absorbed or scattered by the atmosphere over a long distance. I’m not sure how to work out how long such a box might be. Mainly, I don’t know what assumption to make about that high-intensity light at the top.

    Anyway, we should consider that elvish anime eyes originally evolved as an adaption to low-light environments and only later became useful for seeing over long distances, because originally there possibly were no long distances.


  • Hmm. That should allow us to estimate the size of that world. The light of the trees must not be so bright as to cook everything in the vicinity; just make it nice and balmy. But, on the opposite side of the world, there must still be enough light to see. Having the occasional photon bounce back would eventually be enough to make out a static scene, but, apparently, it’s possible to see things happening in real time, yes?

    Does flat mean that we are talking about something like a simple disc here, or just that a beam of light travels parallel to the ground? The latter would imply a rather strange geometry, which I can’t wrap my mind around. It would make more sense, though, as, obviously, we couldn’t assume that light intensity diminishes with the {ETA:] square of the distance.


  • Publications in peer-reviewed journals are how a career in science is built. It’s impossible to measure the productivity of a scientist. What is done, is that one looks at their publications. How many publications do they have? How often are they cited? What is the quality of the journal?

    This creates very bad incentives, leading to things like publication bias. It also means that you must publish in prestigious journals. You don’t have a choice but to accept their terms. Libraries don’t have a choice but to stock these journals. It’s a straight-forward monopoly racket. These publishers make fantastical profits.

    All that money can be used for PR campaigns and lobbying to keep the good times rolling.



  • General_Effort@lemmy.worldtoLemmy Shitpost@lemmy.worldstop
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    10 days ago

    Believing that animals are just like us s hardly and outlandish belief, on the facts. We’re evolutionarily closely related. We have basically the same skeleton. Skull, spine, rib cage, hips, 4 extremities. Arms and legs go: 1 big bone, 2 smaller bones, and lotsa little bones. It looks to be the same with the brain.

    We expect vegans not to blow up slaughterhouses or such. Fair enough. But expecting them to shut up about their beliefs is a bit much, no? Expecting them not to tell people how they feel, not to kiss in public, or hold a pride para… Sorry, wrong prosecuted minority.

    I’ve heard these takes about vegans for literal decades now, and not once has an actual vegan popped up to tell me that I’m a murderer.