• 0 Posts
  • 34 Comments
Joined 3 years ago
cake
Cake day: August 30th, 2023

help-circle




  • Brazil

    We have a weird hybrid system. While the universal care is not known for its efficiency, and sometimes sick people will have to wait for hours to see a doctor, I am sure it beats having to mortgage your house because of a broken arm.

    Besides universal care, people can decide to pay private hospitals and doctors directly. It’s expensive. Few people can afford it (but interestingly, still much, much cheaper than in the US). And then, all of this combined generates affordable and actually good health insurance plans. You get a mix of getting guaranteed care, with a typical insurance monthly fee, which also most companies provide for their employees. Of course there are many tiers of insurance plans, but the most basic and affordable ones are typically very good. It’s rare for insurance companies to deny procedures, something that is completely different than in the US. (It happens, though, depending on the procedure).

    Either way, you never have to worry about what it’ll cost you. No life changing charges, no astronomical bills.




  • The service is ok, but if you (rightfully) do not want to be tied to Cloudflare, take a look at Tailscale Funnels. Same concept, but from a company that values the user and their privacy. Also, for regular personal/small user base, free tier is more than enough. And you get a free .ts.net subdomain to use with your apps, if you need that.






  • I made the jump recently, and although there are clear issues, I don’t see any reason to use windows as my primary gaming OS anymore. Some games still require some fiddling with proton versions, extra command line arguments, environment variables, etc. That is bad for the average user that just wants to click play and play. Also, I noticed that at least on my setup (alienware laptop with nvidia gpu), some games have clear performance issues compared to windows, mainly some UE games. But it’s not so bad to make me want to boot windows again.

    And just some extra two cents: I’m still keeping a windows partition for those games that simply cannot run on linux, and it’s possible to keep your main library on the linux partition (I’m using btreefs) and use that same library on windows. You just have to install a driver on windows, and it works beautifully. Haven’t had any issues so far.



  • Well, one possibility is using something known as Fabry-Perot filter. It allows an extremely narrow frequency to pass, due to multiple reflections and interferences inside the material. Put the light source material within this filter, and you get a laser. That’s essentially the main difference between a led and a semiconductor laser. The filter makes only a narrow band of the emission be “stuck” there, creating a feedback effect that eventually tends to infinity, and a good chunk of that power passes through the filter reflectors, which are intentionally not perfect.

    Other than that, I don’t think there is a filter that could be as narrow as the line emission from vapor lamps. Maybe using metamaterials, but a laser would be so much cheaper and easier. A vapor laser would certainly get the job done, but they are large and hard to maintain.


  • A laser, maybe, but definitely not LEDs. Vapor/gas lamps produce the narrowest frequency bands possible, because it comes from very well defined atomic transitions (Hz range). LEDs produce frequency bands with widths in the GHz/THz range, while semiconductor lasers can maybe reach KHz if they are really good. So, unfortunately, for this type of applications, vapor lamps would probably still be needed.

    Source: I work with lasers and spectroscopy.

    Edit: very good idea about using non-visible light!