timerol

I'm sure there are HNers who built desktops with 8TB or 16TB hard drives, and have not (yet) needed the space for as many games and media as expected.

He is also extremely active here, so there's a good chance he reads and responds to a random comment without an email. But email is the approved (and fastest) way to go about it

Boston keeps a table of qualifying times that need to be hit. But it's such a popular race, that people train to hit that qualifying time, and they end up with too many runners. The solution is to use a cut-off time to adjust all of the qualifying times. As an example, an 18-34 year old male had a qualifying time of 3 hours exactly for the 2025 Marathon (which qualification ended for last month). The cut-off time required athletes to be 6 minutes and 51 seconds faster than the qualifying time for their age group and gender. So qualification was actually 2:53:09, but no one knew that when they were running. (Next year they've adjusted the times all down 5 minutes to compensate, though they'll likely have around a 2 minute cut off, since the times have been getting faster.)

https://www.baa.org/races/boston-marathon/qualify

Note that the exact version of this technique is used in chess for the endgame, referred to as a tablebase. Chess is solved once there are 7 pieces on the board, in an 18.4TB database, described here: https://lichess.org/@/lichess/blog/7-piece-syzygy-tablebases...

5 years has made a large difference in prices, as shown in this graph quoted in TFA: https://www.paulzimnisky.com/Price-Evolution-of-Lab-grown-Di...

Assuming you mean "late 2018" by "about 5 years ago" (because that's where the graph has a 1.5:1 ratio), that $1200/$800 diamond was probably about 0.2 carat (obviously depends on the other Cs), and would likely be around $1200/$300 today.

Better energy density, since there is no permanent anode structure needed. See chart "b" from the article

The anode is the part of the battery that ions flow to when charging the battery. To save weight as much as possible, you can imagine a case where the anode is only the ions that moved to the anode. This is what "anode-free" means. When the battery has charge, there will be some sodium metal as the anode. When the battery is fully discharged, there will be no anode, because the sodium has moved into the cathode.

> In practice, this doesn't help housing crises very much, but it _does_ increase wealth disparity!

Is your claim that LVT increases wealth disparity? Would it be accurate to assert the flip side of that, that laws like Prop 13 in CA help with wealth disparity? Because, uh, that doesn't seem to be how it's worked out, in practice.

> checks are always worth the squeeze

This is simply inaccurate. You can spend months and hundreds of millions of dollars running scanning electron microscopes over all of your parts - no one does this, because it's not "worth the squeeze". The question is where to draw the line, and I have no idea what your opinion is there.

It's not just a geometric sequence that's convenient for base 10, it's the standard set of geometric sequences (that was chosen because they're convenient for base 10).

The caption on the graph (and the paragraph before the graph) directly addresses this: "This graph shows how any value between 1 and 10 is within ±10% of an E12 series value, and its difference from the ideal value in a geometric sequence."

It's not a continuous piecewise linear approximation of the logarithm, it's a discrete piecewise linear approximation of the logarithm. You are correct that the blue lines aren't continuous, but incorrect about their interpretation - there are 256 individual points evenly spaced along the that x axis that make up the blue graph, not just a handful at the intersections. (A full graph would have 2^32 options in a piecewise linear pattern, but that isn't what the OP has graphed.)

Given that the article is talking about operations on 32 bit integers and IEEE-754 32-bit floats, I personally think it's fine to leave out "discrete" in the description.

This is a good post explaining a lot of interesting concepts, with a section that has surprisingly bad algebra.

> The exact steps to go from the first form to this one are numerous to say the least, but I've included it in full for completeness.

The algebra included after that line has many unnecessary steps, as well as multiple cancelling sign errors. Most notably the second line to the third line does not distribute the negative sign correctly. Picking up after the second line, I would simply have:

y_n+1 = y_n + (1 - x * y_n^2) / y_n^2 * (y_n^3 / 2)

y_n+1 = y_n + (1 - x * y_n^2) * (y_n / 2)

y_n+1 = y_n + y_n / 2 - x * y_n^3/2

y_n+1 = 3/2 * y_n - x * y_n^3/2

y_n+1 = y_n (3/2 * y_n - x * y_n^2 / 2)

y_n+1 = y_n (1.5 * y_n - 0.5 * x * y_n * y_n)

This is fewer than 1/3 of the included steps (between the second line and the end), and has the advantage of being correct during the intermediate steps. I don't think any of my steps are anything other than self-evident to someone who understands algebra, but I'd be happy to entertain competing perspectives.

No idea, but the published url is much more normal: https://ben.page/forks

Yep. Just for fun, I searched for "wool shirt", clicked the first result, opened the first men's shirt I found[1], and checked the fabric: 38% Montana Merino Wool, 50% American Polyester, 12% Modal (beech wood pulp). Half plastic, when I searched specifically for wool.

[1] https://www.duckworthco.com/products/mens-vapor-pocket-tee

> Of course, you can get around production problem by buying used items. I could go to thrift stores and consignment shops and try to find the few things with all natural fibers, and just wear those, and I could learn how to mend and patch them so they don't have to be tossed as they start to wear out, as natural fibers so easily do.

> I could do that, but I have not done that. Why not? I could say I've been busy, a stock answer that is also true, but I think the real reason goes deeper. The truth is that I avoid natural fabrics because I think they won't look good on me.

> Natural fibers are mostly non-stretchy. I'm not super curvy, but I am moderately curvy. My experience with natural fabric clothing is that it either hangs like a giant pillowcase over my body or it bunches and binds in the ugliest way around my breasts, hips, and stomach.

The heat pump version of this exists, but I'm not aware of a fridge. https://signaturesolar.com/eg4-hybrid-ac-dc-solar-air-condit...

> Over 50% of Asian American women who have lung cancer have never smoked

Is this really that surprising, considering that only 2.6%[1] of Asian American women smoke? If 0% of Asian American women smoked, then 100% of the lung cancer cases would come from non-smokers. As it is, the group with the lowest percentage of smokers should have the highest percentage of lung cancer cases in non-smokers.

The article gives no absolute rates to compare, and I can't easily find the article they quote for the rising rates of lung cancer in Asian American women. Given the poor interpretation of the subheading, I wouldn't be surprised if it was entirely explained by aging, or was a reversion to the mean from a very low baseline.

[1] From another comment on this article: https://www.lung.org/quit-smoking/smoking-facts/impact-of-to...

As I understand it, the unconstitutionality of the initial executive order was based on the balance of power in the US government. Doing this kind of thing by executive order is not allowed. Doing this kind of thing by passing a law through Congress is allowed. The Constitution gives a lot of power to the legislature, especially given the interpretations of the Commerce Clause over the history of the US.

> Fuck this one particular subsidiary majority owned by a Chinese company rubs me the wrong way because China doesn't do this to us

Unintentionally funny comment when positioned next to its sibling about this exact thing happening to FB in a targeted way back in '09

Personally I go to mountain and beach towns as a place to stay while I go to the mountains (hiking or skiing) or the beach. I don't see how more development would get in the way of those activities. Especially not if it's denser development.

> According to Goodman, the Airbnb Effect is stronger in small communities, like mountain towns or beach towns, which tend to have limited housing stock, high home prices and little flexibility to adapt to fluctuations in housing availability.

Absolutely no option to build more houses under any circumstances, of course. Just a law of nature that there's no adaptability. Boneheaded.

If you assume the total housing stock is constant, then it makes sense to want to fight displacement by lowering demand

10 MJ/kg is way overstated for batteries. Current Li-ion is around 1 MJ/kg (278 Wh/kg)

The problem with this is that attempting a startup takes 2-10 years, while a poker hand takes a few minutes. Poker would be a lot more luck based if you only played 20 hands and then stopped.

Your father is like you, except that you know he didn't get die before the age of 80. You might die a car crash at age 65. You father definitely didn't die in a car crash 15 years ago.

The paper[1] ignores cycle life, and assumes that a 1 kWh LiS battery will last equivalently to a 1 kWh NMC battery. That's a big oversight, as the frequency that batteries will need to be replaced is a major factor in their environmental impact. Currently cycle life is an issue for LiS, as well as commercialization in general. Ignoring those, it's not surprising that LiS comes out ahead. Honestly, why not include batteries that are even more experimental, like lithium-air?

The paper also references that "batteries should reach a specific energy of 550 Wh/kg in order to ensure a driving range of 500 km." Someone should tell Lucid that the Air doesn't count. It has a range between 650 km and 825 km, depending on battery options.

[1] https://ieeexplore.ieee.org/document/10418456

> Armor is an occasional expense ... Soldiers are a constant expense

I'm not an expert, but it's worth considering that you can't ramp the production of armor in the same way you can ramp conscription. So to have enough armor, you'd need to be buying armor for nobody in times of peace, which is a tough decision, especially if you're living in an era where firearms are improving rapidly.

TFA is about Intel's humbling not Intel's humility. If Intel was already humble, there would be no need for a humbling

It's not punishment. The reason air travel is so safe is because every near-miss is root-caused and policies are put in place to prevent the same cause from resulting in a future accident.

If I write you a $500 check and you accept it for $500 cash (or $500 of goods), you are extending me credit. You don't actually know that my account has the $500 until you cash the check. Someone has to pay that $500, even if I only have $100 in my account. And if I read the article right, the bank is legally required to take the loss.

The main motors of an EV are not powered off of the 48V system. EVs generally have 300-400 V main batteries, with discussion of 800 V on the table (someone may have already done it, I haven't been keeping track).