• 4 Posts
  • 63 Comments
Joined 3 年前
cake
Cake day: 2023年6月14日

help-circle
  • It turns out, that for the values we are talking about here, it actually more or less does! A lemon has a pH of around 2.5, while “Flow” has an advertised pH of 8.1. This means roughly that to neutralize 1L of this water you need approximately 0.4mL of lemon juice or about 8 drops/half a gram. It’s hard to tell how much a “spritz” is intended to be, but a single lemon contains about 60mL of juice, so this represents about 0.67% of the total juice inside.

    It’s a surprising consequence of using a logarithmic scale for pH.





  • I googled it for you.

    https://en.wikipedia.org/wiki/XX_male_syndrome

    In 90 percent of these individuals, the syndrome is caused by the Y chromosome’s SRY gene, which triggers male reproductive development, being atypically included in the crossing over of genetic information that takes place between the pseudoautosomal regions of the X and Y chromosomes during meiosis in the father.[2][7] When the X with the SRY gene combines with a normal X from the mother during fertilization, the result is an XX genetic male. Less common are SRY-negative individuals, those who are genetically females, which can be caused by a mutation in an autosomal or X chromosomal gene.[2] The masculinization of XX males is variable.



  • I’m currently working on a government funded project to develop a robot to locate nuclear contamination in soil (for cleaning up the Hartford and Savannah River sites, where we used to make nuclear weapons). The idea being that we use robots to perform these surveys rather than handheld detectors.

    My recommendation though, is focus only on one thing. Having two degrees has not made me particularly marketable, it is certainly unique, but HR doesn’t actually seem to give much of a shit. Instead, it’s much better to focus on one thing, get a Masters or PhD in it (double degrees also suck for this as well, because you don’t have time for research and publishing when you’re graduating with 195 credit hours taken out of 128 required, so even if you have a good GPA it’s hard to get into grad school).


  • I did a double major in college.

    In my computer engineering courses, I learned digital signal processing, and then took a follow-up course on signals and systems because I enjoyed the material and I had an eye on robots, because robots are dope.

    Imagine my surprise when I got to 4th year and I suddenly found myself using the exact same math to handle thermal and fission product neutron poisoning feedback in my nuclear reactor physics courses.



  • A problem that only affects newbies huh?

    Let’s say that you are writing code intended to be deployed headless in the field, and it should not be allowed to exit in an uncontrolled fashion because there are communications that need to happen with hardware to safely shut them down. You’re making a autonomous robot or something.

    Using python for this task isn’t too out of left field, because one of the major languages of ROS is python, and it’s the most common one.

    Which of the following python standard library functions can throw, and what do they throw?

    bytes, hasattr, len, super, zip