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Cake day: June 17th, 2023

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  • Smart home stuff can be done right.

    • You need to focus on the use case. Is what it is doing actually necessary? E.g. smart lights are amazingly useful, smart washing machine? Why?!?

    • The S in IoT stands for security. Smart devices need to be treated as security risks. Mine have their own WiFi to play on. They don’t get to play with my important devices. Also, internet access is a privilege, not a right. ZigBee is often superior to WiFi too. Control the bridge and you have absolute control of their internet access.

    • Open source for the win. A lot of IoT options can run open source firmware. This helps break open the black boxes and let you see if they are doing bad things. Home assistant, EspHome, and Tasmota are the big 3 to look into.

    • If you’re not the customer, you’re the product. Google etc sell smart speakers at a loss. If you must have them, treat them as actively hostile. I’m still trying to find a good alternative to some of their functions, but getting there.



  • It also needs to be somewhere geologically stable. You really don’t want erosion cracking open the storage. That limits the options.

    It’s also worth noting that habitability can change remarkably rapidly. E.g. the Sahara went through a green period. It ended about 5000 years ago. The reverse can also happen.

    The mindset being used is also layered defense. We need to make it simultaneously understandable, boring and off-putting. Putting it somewhere inaccessible also helps.


  • NFTs were (is?) to copyright what Cryptocurrency is to money. A decentralised system, without requiring a central organiser.

    With cryptocurrency, the token was the money, and inseparable from the Blockchain. With NFTs it was the equivalent of a recept, not the item.

    Basically, NFTs tried to replace copyright etc. However, they have no enforcement ability beyond that of local copyright enforcement. At that point, you might as well just use local copyright directly. No need for a middle man.






  • Most modern desalination plants use a “reverse osmosis” method.

    You have a barrier that water can pass through, but salt can’t. Normally, water would be drawn across this barrier, till the salinity is the same on both sides. This is osmosis, and how things like plants draw in water.

    Reverse osmosis works by using a high pressure on the salty side. This effectively forces water against the osmotic gradient. This is generally done with relatively small amounts of salt water at a time. The end result is fresh water on one side, and extremely salty water on the other. If the salty “brine” is discharged too fast, it can mess up the local salinity levels in the sea around the vent. The process is also very energy intensive (though a LOT less than boiling the water off).

    You also have the problem of the membrane being very sensitive to getting damaged or blocked up. You need to clean the sea water up a lot before you can desalinate it.

    This new process would help avoid the brine issue, as well as likely being less sensitive to contaminants.




  • cynar@lemmy.worldtoMildly Infuriating@lemmy.worldMath homework
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    6 days ago

    It lets them use a consistent reference for counting, as well as 1D, 2D, and 3D measurements. They also give something to learn with tactilely, rather than just an abstract set of ideas.

    Basically lock the idea of measurements in with the cubes. Then, only when they are confident, split them off into counting and the dimensional concepts.

    It works very well for a lot of children.



  • A lot of it is a storm in a bottle. There are periodic discussions about it. It tends to be when the central government (based in London) gets to South East England centric.

    Right now the numbers wanting independence are higher than usual, but not into the realms of breaking away imminently. However, it’s also worth noting that a lot of England is also pissed off with parliament for various reasons. We seem to have a similar capture issue to America (excessive willingness to please big business/money over the people from both sides).

    Basically it’s a shot across the bows to the UK parliament to do their fucking jobs, not just line their own pockets.