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pflats

HN member
Joined
Tue, Jan 25, 2011, 5:50 PM UTC
HN karma
2,140
Public activity
407 items

About pflats

I teach mathematics and computer science and physics.

email: ask me

Recent public activity

  1. comment
    Comment #39348896

    I was curious, so I grabbed three undergraduate-level physics texts I had nearby. One explicitly recites the Ultraviolet Catastrophe prompted Planck story, complete with Rayleigh's…

  2. comment
    Comment #39348582

    Suppose an author uploads their book to ExamplePrint Inc, a one stop shop that prints made-to-order books for customers. The reader goes to ExamplePrint and buys the book. ExampleP…

  3. comment
    Comment #36295652

    A bit of an oversimplification and slightly wrong, but the problem is essentially that it is a Bad Spaniels brand dog toy, parodying the sound-a-like Jack Daniels brand whiskey. Th…

  4. comment
    Comment #36214660

    More specifically, Steve Jobs founded NeXT after Apple pushed him out in the late 80s. A decade or so later, Apple was on the tail end of a long, slow, downward slide. The team was…

  5. comment
    Comment #35917254

    Zuckerberg almost always refers to one specific person; Cuban is a last name of an investor and also describes things related to the nation of Cuba.

  6. comment
    Comment #34315341

    Not true. One of the very first lines there states that: > OGL 1.1 makes clear it only covers material created for use in or as TTRPGs, and those materials are only ever permitted …

  7. comment
    Comment #34279981

    20% is going to the publisher. They paid for the Steam version, including hiring the graphics and sound people. They're also handling customer support for the paid version. https:/…

  8. comment
    Comment #31741229

    The study also does not claim to show a causal relationship.

  9. comment
    Comment #25606642

    To add a little detail to what others said, amphetamine and its salts are explicitly a Schedule II controlled substance in the US. https://www.deadiversion.usdoj.gov/21cfr/cfr/1308…

  10. comment
    Comment #23614586

    > Isn't there a serious risk of bias, there, though? For example, if a journalist is specialized in CS and have to write about the ecological impact of technology, you can expect t…

  11. comment
    Comment #23614432

    This is the case; it really shouldn't be downvoted. > Apple dominates the global handset market by capturing 66% of industry profits and 32% of the overall handset revenue. Samsung…

  12. comment
    Comment #22404797

    > Also, curse the Greeks for not using more idiomatic variables. ∑ would never pass code review, what an entirely unreadable identifier One thing I tell my high-school students: ma…

  13. comment
    Comment #22269190

    > I'm sort of conflicted about the fine hitting now, as a result. If they were still being intransigent about the issue, sure, but they've already fixed it... It seems right to me.…

  14. comment
    Comment #22205533

    Thanks for writing this! It's spot on. I referenced it in a post upthread[1]. [1] https://news.ycombinator.com/item?id=22204995

  15. comment
    Comment #22205020

    Thanks for writing this! I referenced it in a reply upthread for why I like the equation. https://news.ycombinator.com/item?id=22204995

  16. comment
    Comment #22205015

    Thanks for writing this. It was indeed a large part of why I like it. I added more detail in a reply to the parent post. https://news.ycombinator.com/item?id=22204995

  17. comment
    Comment #22204995

    I got busy, so I wanna say thanks to everyone who tagged in for me. So many great answers. I'll link a few that speak the most to my own feelings. Why do I like it? I am, as klodol…

  18. comment
    Comment #22201446

    I'm a pure math dude at heart, even if I don't get to do it much any more. Two years ago, my wife asked me, "If you had to get a math equation tattooed on your body, what would it …

  19. comment
    Comment #22173552

    It depends on what the app does and how it does it. The first step (authenticating) returns a token with your app id, user email address, a unique user id, an expiration time 5m fr…

  20. comment
    Comment #22057673

    The process deregisters the phone number from the account; it does not shut down the entire iCloud account or disable iMessage entirely. "iMessages" sent to your phone number will …

  21. comment
    Comment #21993712

    I wouldn't be surprised if there are a number of confounding factors that skew male, such TV shows/movies/video games marketed to men that feature Iran and/or the region.

  22. comment
    Comment #21950331

    I really like it, but just a heads-up: the directions threw me for a solid 15-30 seconds. "Click a piece to select it, then click on the board to place it." Okay, cool! I clicked o…

  23. comment
    Comment #21935015

    I went to the National Review (the conservative magazine) probably because they're @NRO on twitter.

  24. comment
    Comment #21775919

    I teach mathematics and write math curriculum professionally, and have literally taught the lesson I describe above for the better part of a decade. I say "we" in that post because…

  25. comment
    Comment #21774876

    Huh, I was part of a study during my brain MRIs at NYU Lagone. I wonder if my brain is in there.