• 0 Posts
  • 31 Comments
Joined 2 years ago
cake
Cake day: September 16th, 2023

help-circle



  • If you want to print in ASA, you’re going to want an enclosed model. I recently bought a Qidi Q2 after going through the same frustration with my old Ender 3. My main selling points on it were that it was capable of handling stuff like ABS and ASA, and most importantly, gave me full control of the device. Unlike Bambu, I have the root password to the controller board (which runs Klipper), and the (admittedly mediocre) AI spaghetti detection runs fully locally. It also has a carbon filter built in, which is a must if you intend to put the printer anywhere indoors and print in something other than PLA or PETG.


  • They also work great for getting PETG prints to release from PEI build plates. Flip the can upside down, spray at the back of the sheet where the print is until it forms a thin layer of frost. Wait until the frost disappears (really you’re waiting for the metal to contract, but you won’t see that), bend the plate, and the part should pop right off.

    …then flee to somewhere better ventilated to escape the cloud of bitterant before you vomit.


  • OP isn’t referencing “the imaginary numbers” as in the set of numbers that are multiples of the square root of -1. They’re referencing the fact that in grad school, you’re told “forget everything you’ve been taught about math up to now. We’re going to start with a couple of basic assumptions, and extrapolate all of Cartesian Algebra (the math taught in preschool through undergrad) from those assumptions. Now, let’s see what other algebras we can create by changing those assumptions.”

    The only two “numbers” that need to exist to derive all of Cartesian Algebra are zero (additive identity) and one (multiplicative identity). All other numbers are just convenient identifiers that can be extrapolated rather than assumed, hence the overly simplified “all numbers are imaginary”.

    This is similar to other STEM subjects, like how in Physics you’re taught Newtonian physics, then you’re taught why Newtonian physics is just a tiny subset of relativistic physics, and then in grad school you are taught everything you know is just a tiny subset of quantum mechanics. What’s taught in undergrad is “good enough” for your average person to do really complex things in typical day to day life, but for someone dedicating their academic career to the subject, they need to learn the dirty, overly complex details to have a true understanding of the subject.



  • Cynical answer: They’re worried about the malpractice case if the woman miscarries because of something they did.

    More realistic answer: I don’t think it’s so much trained to first think about the potential fetus, as much as if there’s no emergency and the only difference between potentially causing a miscarriage / deformity and not doing so is a few questions, why not ask them? If she was on a gurney being rushed into the ER it would be one thing, but if she’s ambulatory and has the time for the subsequent urine test, better safe than sorry?

    Most realistic answer: It’s a funny comic about the level of dismissal many women feel when dealing with doctors. Laugh bitterly, share with a friend, and try not to worry about what assholes on the Internet think.










  • You’re probably wanting [ -z "${VAR1}" -a -z "${VAR2}" ]. Note in bash that there are minor differences in how [ ] and [[ ]] tests are handled. You can pull up a handy cheat sheet of the operands on most distros by running man test, though you’ll need to read through the CONDITIONAL EXPRESSIONS section of man bash if you want to see the minor differences of the single vs double square bracket commands (mostly whether locale applies to string order, as well as whether operands are evaluated in numeric comparisons).