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cynar

@ cynar @lemmy.world

Posts
4
Comments
771
Joined
2 yr. ago

  • xkcd: Chessboard Alignment

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  • French Anatomy

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  • That image will stick in the mind of every school boy (and possibly girl) who sees it. That's a win for the textbook.

  • Honestly, we're just looking to go in a new direction with different positions.

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  • A small group of idiots can do a disproportionate amount of damage. These men can't get and keep a lady, so go on a disproportionate number of first dates.

    It's the same with the inverse, "bunny boilers". Far more men have been on the receiving end than most women expect. For women it's even more extreme. It takes a woman a while to build to that emotional state. The male equivalent can go bang after just a few messages, or a single date.

  • Minneapolis police chief warns officers: Stop unlawful force by ICE or lose your job

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  • Half a course would be better than nothing. A full course would be best, but half is a LOT better than none.

    The general way to make lasting changes stick is to support moves in the correct direction. Improvements are generally 1000 tiny steps, rather than 1 big leap.

  • Chessboard Alignment

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  • One of the most difficult bits is defending from future time snipers. You don't get to move out of the check, so it's checkmate. It's not actually hard, just mind bending.

    It's also weird to have 3 white kings on the same board...

  • Chessboard Alignment

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  • It's not actually too bad. Any checkmate wins the whole game. It just gets weird. The king can flee to another board, or you can checkmate into the past.

  • Chessboard Alignment

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  • consensual

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  • I tend to read it as "they do not speak for me". If you don't speak up, then many people believe you agree with them, by default.

    By apologising, you are saying you actively disagree, but don't want to get bogged down in the details. You might not stand directly with the victims, but you do stand beside them, against the abusers, and want them to know.

  • Which private (no cloud requirement) wireless home security cameras save footage locally without monthly subscription?

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  • I second the wired camera recommendation, at least for a few critical cameras.

    WiFi cameras are vulnerable to a de-auth attack. It's fairly trivial now to make a device that will kick all WiFi devices off of a particular network. It's not so bad if they record internally and are inaccessible. If they can be reached, once someone is inside, or if they don't record, they can be bypassed completely, or stolen.

    This does all depend on the level of protection required. Basically, are you worth the effort of targeting, or is it just to dissuade opportunistic attempts.

  • How long after starting Vitamin D supplements should you notice results?

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  • Vitamin D helps if you are dealing with S.A.D (seasonal affective disorder). Basically, our brain gets to go into a state akin to hibernation. Unfortunately, modern life isn't compatible with this. The effect is tiredness and low mood.

    SAD seems to be triggered by low vitamin D, low exposure to sunlight, and the cold. The exact trigger levels vary from person to person.

    If you've not tried it yet, a daylight lamp could help a lot, combined with the Vitamin D, it trucks the brain into thinking it's still warm and bright outside. You want a hot in the morning, as well as one in the mid to late afternoon.

    Failing that, accept your need to hibernate, and plan it in. It's not ideal, but not fighting it will also help your mood.

  • Study claims to provide first direct evidence of dark matter

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  • There's a lot more to teaching than just good explanations. I do enjoy trying to explain complex science in more understandable ways however.

    As for struggling, we all do at times, pushing through is how we get better. Also science is a little like a spider web. If you look closely, at just a few strands, they don't make obvious sense. It's only when you build up a broader picture that it becomes obvious and easy. Building that picture, unfortunately, requires pushing through the "what the hell, I can't make sense of this!" stage.

  • Study claims to provide first direct evidence of dark matter

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  • It would be a mix of relative rates and the exact energy.

    If you pick an area of "empty" space where you expect very little dark matter, you will get a baseline reading. When you aim at an area expected to be dense in dark matter, you will expect to get a higher reading. E.g. 10 counts a day, Vs 100 per day. This is basically how radiation detection works on earth, so the maths is well studied.

    The other thing is energy levels. 2 electrons hitting have a distinct energy. It will vary upwards slightly, due to kinetic energy, but not that much. We also know the annihilation energy of other forms of matter, from earth experiments. A reading distinct from anything normal would be a good signature of an unknown type of matter annihilating.

    There are also extra complications from things like red shift, but those can be measured in other ways, and corrected for.

    The order of theory and discovery also helps. "Finding X that happens to support Y" is a lot weaker than "Predicting X from theory Y, then going and finding it". If you run 1 million experiments, a 1 in a million result is quite likely by pure fluke. A 1 in a million result from a single, focused experiment is a lot more powerful.

  • Study claims to provide first direct evidence of dark matter

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  • In a short summary. Something is wrong with the spin of galaxies. There is more mass than we can account for, and it's distributed wrong.

    Either the laws of gravity are slightly wrong, or there is something out there with mass, but no interaction with other matters (light particularly).

    More recent, more detailed studies have shown that the error is not consistent. Therefore either the laws of physics vary from galaxy to galaxy (very unlikely) or it's something physical, rather than a law error.

    That leaves dark matter, sometimes called W.I.M.Ps (Weakly Interacting Massive Particles). They don't seem to interact with electromagnetism at all, and even any strong or weak force interaction is minimal. It only interacts gravitationally.

    We know the interactions at minimal due to gravity mapping. It seems to form a cloud around galaxies, rather than collapsing in. To collapse in, they must interact to exchange momentum. If they only interact by gravity, that collapse will be extremely slow.

    That is most of what we can be fairly sure of. There's a lot of speculation around this, and we might be barking up the wrong tree completely. However dark matter via WIMPs seems to be the most consistent with the evidence right now.

    Edit to add.

    This experiment seems quite ingenious. It assumes that WIMPs have a mix of both matter and antimatter. Ever so often a matter/antimatter pair get close enough to annihilate. This creates a pair of gamma photons. The existence of these would help back the existence of physical WIMPs. The energy would also tell us something of their mass (photon energy = mass energy + momentum energy). That will help narrow down where to look in our particle accelerator data.

  • I do this

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  • I'm a member of a maker space. It's a fun game to "nerd snipe" other members, as they are leaving.

    It can backfire however. We've had the sun come up on us, while chatting in the car park. That was a mutual win/loss.

  • British plugs

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  • The type G was designed when things were designed to do their jobs. Any pain inflicted by user error was considered a learning opportunity.

    The cord coming out the bottom means the plug can't pull out. Combined with the big, chunky plug and pins, means the cable will likely fail first if pulled. It will also fail at the live core first, leaving a safe plug in the wall.

    But yes, the foot pain is... impressive. It's just blunt enough to not generally penetrate the skin, but it can happen.

  • British plugs

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  • I've taken a 240VAC hit a few times. That will definitely wake you up.

    Interestingly, the only times it has happened have been when I've been abusing the wiring. Never via a plug etc.

  • Jeopardy wall calendar pretending that the coastline paradox doesn't exist

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  • It's not a true fractal, so the length has some finite bounding. It's just stupidly large, since you are tracing the atomic structure.

  • I'm in danger... (From myself)

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  • How did you manage to get them into the harnesses? That would make life a hell of a lot easier.

    Currently they have slip knots around my neck, and are insisting on running off in different directions.

  • "You can always trust your mother to be on your side" -Actual phrase my mother said

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  • Adopting a rescue dog has various home checks and interviews and welfare checks. Leaving hospital with a baby: "Do you have a car seat for them?", "Yes...", "You're all good to go then!", "..."

  • homeassistant @lemmy.world
    cynar @lemmy.world

    Robot Lawnmowers

  • Android @lemmy.world
    cynar @lemmy.world

    Kids Tablet recommendations.

  • homeassistant @lemmy.world
    cynar @lemmy.world

    Low cost Zigbee GU10s via Ikea (UK)

    www.ikea.com /gb/en/p/tradfri-led-bulb-gu10-345-lumen-smart-wireless-dimmable-white-spectrum-40517647/
  • Linux Gaming @lemmy.world
    cynar @lemmy.world

    Recommended linux variant for gaming.