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Cake day: 2023年7月13日

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  • You’re mostly right with the depth of field being the big difference but the image being darker is not a function of aperture (f-stop) directly, but rather overall exposure. At the same ISO setting, two identical shots in the same lighting would be the same brightness with truly equal exposure: the reduction in aperture (increasing to m the f-stop number to a higher value) would be compensated for with an equivalent decrease in shutter speed (in simple terms, constricting the hole lets in less light, so we leave the hole open longer to let in the same amount as before).

    In the example, if the scene is darker it’s because the exposure changed, not just because of the aperture.

    Additionally, the number is shown as a fraction because it is a fraction. The “f” in the value (f/2.8) is a variable that stands for “focal length”, that being the focal length of the lens being used. So, for example, a 50mm lens set to f/2 would have its aperture set to a 25mm diameter. (50/2)

    The reason the numbers are strange numbers and non-linear in scale is because they correspond to aperture diameters that let in either double or half the amount of light from the stop next to them. So adjusting from f/2 to f/2.8 cuts the amount of light in half (I think this is basically doubling or halving the area of the circle of the aperture).

    This is why a one stop change at lower values (bigger openings) has a much smaller numeric shift than a one stop change at higher values: adding or subtracting diameter of a larger circle adds or subtracts much more area than the same diameter change to a smaller circle. That’s why one stop goes only from f/2 to f/2.8 on the wide open end, but on the closed down end, one stop goes from f/11 to f/16.




  • Anyone who thinks tariffs will do anything at all positive for the American working class is absolutely clueless.

    All they do is make prices jump for consumers. It doesn’t put domestic goods at an advantage because the domestic producers of those goods increase their prices artificially to achieve parity with import pricing.

    So prices go up for the consumer with the extra money going to either:

    1. For imported goods, to pay the tariff, a tax, to the government, which in this case wants to use that tax revenue to offset tax cuts for the wealthy.

    or

    1. For domestic goods, it’s pure straight profit for the unethical corporations who are price gouging their domestic customer base. They’re not giving the consumer a break on price and they’re not sharing the profits by giving employees raises. Hell, they’re not even taking advantage of the competitive advantage to ramp up production and create jobs. They’re just pocketing that extra cash for doing exactly what they’re always doing…passing it on to, you guessed it…the wealthy.




  • This is the thing.

    While I doubt it’ll have any actual difference being seen by anyone anywhere, if this killing were followed up by a few more, or even a dozen more in short order, you would see change.

    Most of it not the kind we’d hope for (tightened security, lockdown corridors for high profile individuals, even less access and interface with these people, etc…not concessions to decency, honesty, civility, humanity, etc.) but you bet your ass that it’d be living rent free in the back of every CEO and billionaire on the planet for a long time.



  • Windows ‘just works’? What about all the programs crashes that you need to go through endless YouTube tutorials to fix? What about having to fill up a form and register your credit card for every closed source program you need to install?

    I’ve literally never had either of these experiences with W10.

    At least not in the past 5+ years.


  • Yes it was longer than that.

    My main thing is that, then and now (based on discussions I read between users), most any user experience that I relate to seems to be equal parts:

    “try to figure out the Linux equivalent of what you were doing in Windows and hope it’s compatible with the rest of your needs”

    “Try to figure out how to get Linux to behave like Windows to accomplish something you did with that os”

    “Become a hobbyist…programmer? IT specialist? And get familiar with tweaking and adjusting the details of how your computer works just to get it to do things you want”

    Like…for people who enjoy it, I’m happy for them. Really! But I don’t want to have to familiarize myself with commands, learn how to boot things up, or learn a whole list of things just to get the simple mindless functionality I have with Windows from decades of time in the system.

    I think back then I tried Debian, Ubuntu, and…is ‘OpenSUSE’ a thing? I even had a group of three friends who were all super into Linux encouraging me and helping me every step of the way, and I was young and technically inclined and happy to have a challenge…and in the end, I went right back to Windows after a semester or two of that, because I just found that my experience was, broadly speaking, “Enjoy a problem solving exercise in software management every time you want to do something, just to get to a basic level of function, with added quirks that you’ll just have to deal with…and little real benefit for the order of magnitude of extra effort”.

    And while I’m sure some of that would have had to get better in the years between, most of the conversations I still see about Linux are enthusiasts enjoying coming up with solutions to the issues of using their chosen system. Which again, that’s fine, but I don’t want to have to become an enthusiast of an OS.

    Given a choice between, “have to learn how to get the OS to do everything” vs “put up with data collection and some intrusive ads once in a while”… I’m happy to go with the latter to have things just work without having to learn a new skill set just to get the same level of functionality.

    I’m happy to use W10 well after its official support ends, though I strongly suspect there will be significant extensions to that timeline. Even then, I’m happy to use it until it’s no longer the path of least resistance, at which point, I’ll reevaluate my options. When we get there, if it seems reasonable, maybe I’ll dip my toes into the Linux pool again.


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    7 个月前

    Man, it’s a toss up for me as to which I hate more: Microsoft threatening and badgering me toward W11 (and by extension, a new computer) or Linux fanboys evangelizing for their preferred system.

    Both are complete non-starters for me. I’m not buying a new machine while my current one does everything I need just fine… And after a few years of using Linux on my laptop back in college, I have no desire to set foot in that environment again either.




  • For a few years, it seemed like everyone I knew who has having a little girl was naming them after old presidents.

    So many Kennedys and Reagans and Madisons…

    My girlfriend at the time did really like “Madison”, but I told her if we were ever to have a little girl and we’re gonna name her after a former president, we’re gonna have a little Eisenhower running around.

    She laughed (as was the intention) but agreed the trend was a little ridiculous.


  • It shouldn’t be concerning, it should be enlightening.

    But it won’t be. Not for the party leadership.

    Over the past 40 years they’ve gone from being the champion of blue collar and union workers nationwide, and being able to take those votes for granted…to having the rust belt become the biggest swing region in the country (which their opponent swept this month). Did they take this as a wake up call and do more for the blue collar voters to win their loyalty back?

    Nah, they just blame them and talk down to them, and tell them they’re too stupid to know what’s best for them.

    In that same time frame, they were seen as abandoning the blue collar worker to court the minority vote, talking their efforts at helping factory workers and turning them toward helping minorities in race and gender. While they were actually doing this they did indeed appear to gain that loyalty at the ballot box. Of course once they had it, they felt no need to keep up the good work for these people and have slowly become a party who does nothing for anyone, and runs on a platform of essentially admitting they do nothing, but that their inaction is better than the other side, so they should still be owed votes.

    Once again, this isn’t working out for them, and once again, rather than take it as a rejection of what they’re doing, no…it’s the voters who are wrong.

    I despise the GOP as much as any reasonable person, and I firmly believe that many of their voters won’t like what they voted for once they start to get it…but there’s no denying that the GOP has a message, goals, and demonstrable progress toward them. And to counter that…the Democrats have…“I think things are good and I wouldn’t change anything. You should vote for me because I’m not MAGA aligned, and if you don’t, it’s your fault not mine.”

    Arrogance is off-putting, and it appears it’s going to take at least a half century for the Democrats to figure that out.


  • First, an explanation isn’t an excuse. It’s a reason. It doesn’t make it okay, it doesn’t place or shift blame, it just correctly points something out.

    In this case, Trump broadly received the same number of votes as he did 4 years ago, while the Democrats got millions fewer.

    There’s no assumption there, it’s just an observation.

    It’s not pushing or assigning blame. Maybe they didn’t vote because they were lazy. Maybe they didn’t vote because they didn’t like Harris. Maybe they didn’t vote because they didn’t like the process by which she became the nominee. Maybe they didn’t vote because they’ve lost faith in the entire system.

    Regardless of reason, and regardless of how any observer decides to interpret it or assign blame, the facts speak for themselves.


  • I feel like this is very situation dependent.

    That may be the case in your company or industry, but not everywhere.

    In my experience there’s been a big difference between a general resume I’m uploading to a place like a LinkedIn or Indeed (and letting the recruiters come to me), using that uploaded resume to apply to job postings on that site, and sending resume/application to specific companies on their site.

    For the first one, hell no, no cover letter. How would that even work? No cover letter is better than a generic one.

    For applying for specific postings on these sites? For me it depends on just how good the opportunity is. If I feel like there’s some sort of special connection that makes me tailor made for the role, the money is great, it’s doing really interesting work, or a company I really want to work for? Absolutely I’ll include a cover letter. I’m just looking to get out of a shit job, or the role doesn’t really move the needle, but I think it might be a good fit? Nah, just hit that quick apply button and move on.

    But if I’m reaching out to a company directly?

    Cover letter every time (unless they specifically say not to). If they don’t want it, they won’t read it, but I’ve never felt like it hurt my chances, and in a few interviews, they’ve specifically mentioned something about it.