Decentralise everything!

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Joined 4 years ago
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Cake day: June 27th, 2021

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  • I think it is more specifically electric planes as large as commercial airline passenger planes are impossible. It has a lot to do with battery mass to energy content ratio. Kerosine is about 46.4 MJ (megajoules) per kilogram. Lithium-air batteries, for example, only have about 6.12 MJ/kg.

    So, that means you need 7 times as much battery (in mass) to have the same energy content of kerosine fuel. Naively, we can maybe say that means electric planes only have 1/6 of the range of an equivalent kerosine plane.[^]

    Interestingly, lithium-air batteries theoretically have the largest possible energy density for any battery at 40.1 MJ/kg.

    ^ The calculations are really basic and probably only slightly reflect reality (since there are many other important factors. For example, Hydrogen has a lot more energy per kilogram than kerosine, but because it is much less dense, it has much less energy per m^3 than kerosine. This has made hydrogen gas very impractical for either internal-combustion engines, or planes), but I think it gives an idea of what the problem is.


  • Passive or Active Ventilation. The idea is to encourage air to pass through the home, which helps with removing heat from inside. Passive Ventilation would be opening windows, using wind catchers, etc. This depends on the design of your home, among other things that you probably don’t really have control over. Active ventilation is the same idea, but you use strategically placed fans to induce good airflow. For example, if you have two windows that are opposite to each other, you can place a fan at one window to intake air, and a fan at the other window as exhaust.







  • I think prisons have to be reformed in almost every country, including my own (Canada). Prison should fill one or both of these roles:

    1. Isolate criminals from society,
    2. Limit freedom as a deterrent for crime. Generally agree that imprisoned people should have the opportunity to rehabilitate.

    My point that i want to make is that the punishment should not exceed simply limiting freedom. Prison should protect prisoners from violence. Prison should allow prisoners to live fulfilling lives while there in prison. Prison rape should not be a fact of life in prison. Prison should not dehumanise prisoners. Prison should guard all rights of prisoners (apart from freedom of movement). Prisoners can’t be forced to do work or even follow a routine. Etc.

    Unfortanutely, it seems things are so fucked up that not many have time to seriously fight for prisoner’s rights (including me).




  • I am not sure how PieFed does it. I hope someone more familiar with the actual protocol can shed some light.

    What is important here is whether private votes from the same profile are associated with the same voter ID. PieFed accounts have two subaccounts, a public posting account, and a private voting account. When voting on a Lemmy post, the anonymous voting profile is used. There are multiple ways to do this:

    1. (the way your post assumes) Assign a unique ID x to every voting profile, and every vote by the same ID x gets tagged with x. This is easily traceable, like you said. Even if auto-upvoting of one’s own posts is not done, one can still gather a lot of information about the voter.

    2. Do the same as 1, but, do not tag the vote directly with the voter’s ID x. Instead, encrypt/hash the ID x so that the voter ID tag is different for every vote, but could be decrypted by the hosting instance to get the original ID x.

    From my understanding, it is 2. 2 is better for privacy, with a caveat. Admins would still have the ability to deanonymise private voting IDs.



  • It is true, it seems, that Nicotine treats ADHD. There is at least one study that showed nicotine patches (18h and 24h ones) provide a mild to moderate relief for ADHD in people that do not use nicotine otherwise (e.g. nonsmokers). So, it doesn’t just treat the symptoms of nicotine withdrawal.

    Cigarette smoke is known to contain a clinically significant amount of MAO inhibiters that are not nicotine. MAO inhibiters are regularly used to treat depression and anxiety, and theoretically could treat ADHD since MAOI’s generally prevent breakdown of dopamine. There is some nuance here.*

    • For example, there are different types of MAO (monoamine oxidase - an enzyme that breaks down monoamines. Dopamine is an example of a monoamine), like MAO-A vs MAO-B, which break down different monoamines, and MAOI’s (MAO Inhibitors) differ on whether they inhibit A, B or both. Furthermore, there are reversible vs irreversible MAOI.