A Reddit Refugee. Zero ragrets.

Engineer, permanent pirate, lover of all things mechanical and on wheels

moved here from lemmy.one because there are no active admins on that instance.

  • 3 Posts
  • 16 Comments
Joined 1 year ago
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Cake day: December 22nd, 2023

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  • Huge advantages. So much so that multiple government agencies will actively rely on amateur operators to get status reports and communications in and out of disaster zones. There are organizations dedicated to training and indexing operators too, both independent and government run.

    https://en.m.wikipedia.org/wiki/Amateur_radio_emergency_communications
    http://www.arrl.org/amateur-radio-emergency-communication

    For personal communications it’s not that great of course, but you can become an invaluable asset to your nearby community by having a radio during a disaster.

    Typical mobile amateur radio kits can be operated on tens of watts at most, and will effectively run indefinitely from small solar panels or an idling car. And you can reach out quite far just by tossing an aerial wire up in a tree anywhere.

    If you’re interested in getting into amateur radio I highly recommend it. It’s super fun to chase signals and see what parts of the world you can talk to. Definitely worth getting licensed as it’s not a terribly expensive hobby to get into either (although the cost ceiling can be… very high haha).
    You don’t need a license to listen, only transmit, so if you don’t want to committ you can grab a cheap radio and some wire for a poor man’s listening station.


  • Curved slopes can be defined as any combination of mathematical formulas on a graph. This means there are any combination of ways to get feom one point to another - effectively infinite.

    For a 2-dimenzional plane, these curves are usually defined as a value (y, vertical axis) that is calculated at each location of another value (x, horizontal axis).

    A linear slope or “straight line” is a simple rise over run. For every x units you travel in a direction, your height will change y units. On a 2d plane it is the “most” distance efficient way to get from A to B.

    How you define “smoothness” matters… In math land, the linear slope is the smoothest as its curvature never changes. In real life it results in an abrupt stop and start at either end with a constant velocity along the line.

    A real life “smoothest path” when changing the Y-value/height of your line involves a cubic or logarithmic slope-in and slope-out of the line, like this bezier curve.. Think of the “steepness” as the speed of your car (how fast your distance changes along the y axis), and the x axis the time you have been driving. Gradually pushing the accelerator on your car until you’re up to speed, coasting in the middle, then gradually apply the brakes until you come to a stop at point 2.