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Joined 1 year ago
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Cake day: March 29th, 2024

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  • Solve space and openSCAD are both great options. I have been learning solve space lately and it is great. I couldn’t learn freecad, something about the UI and workflow was just too unintuitive for me.

    I was burnt by fusion 360. Had some of “my” designs locked in the cloud when they spent 2 weeks and a dozen emails trying to “fix” my educator access. The fix they really wanted was my credit card details. I refuse to use or teach anyone to use that ecosystem now.




  • Even with 2 sigma confidence lines there is barely a correlation in a lot of this data. If we looked at the 3 sigma confidence lines there would be nothing here.

    I remember one study had such a small sample size that a single man having a heart attack on his way to work was the bulk of evidence used to criticize the time switch. A scientist with an agenda can usually get their position published even if it’s questionable.

    The overall evidence weakly suggests there are negative health effects here when we make a time switch. But if it was truly a large statistical shift with high confidence values then we probably would have a much stronger scientific case to address time shifts in our society cycles. We would also have to include a much wider study. Are there papers looking at the possible beneficial effects of these time switches out there? And lastly, is this even worth the research time and potential implementation cost?

    As it stands now, it’s basically just a bunch of people’s personal preference of when they want more light relative to the standard work day. Personally I would be happy to use UTC worldwide and just shift the hours appropriately with location, but that won’t fly with most people.














  • I had heard this was happening. Probably relatively low risk for a lot of them, plenty of other private work around. Good on them for pushing back though.

    The bus drivers in the ACT also took unprotected action last year. It was not as big of a news story. But it is definitely happening more often. I don’t think any of them lost their jobs.

    https://amp.abc.net.au/article/104603964

    If the Sydney government (aka NSW government) wants people to work for cheap in Sydney. Perhaps they should have focused on making it a more affordable place to live.

    I wonder how quickly they would change tact if the rail drivers just took 1 week of unprotected industrial action. But for them, there is not as much private industry to switch to. They would have to be willing to work in another state in the event that the government fires them.



  • Depends if you care about names or about physics. Radio, Infrared Gamma etc are just names we give to various parts of the continuous electromagnetic spectrum. The edges of these definitions are not super well defined. Changing from RF to microwave could be defined at say about 3 GHz, but there is not some clear physical difference between a 2.9 GHz photon and a 3.1 GHz photon other than the frequency change.

    The lower limit to the frequency is I guess the inverse of the theoretical age of the universe/2. Something can’t currently be oscillating slower than that.

    There are some theories on plank length, quantisation limits, etc that might set some theoretical upper limit of photon frequency. But we don’t appear to be anywhere close to observing such things. We have seen some rather crazy short wavelength particles that we haven’t fully understood.

    https://en.m.wikipedia.org/wiki/Oh-My-God_particle