Electrochemical pile style oxygen sensors continuously deplete themselves whether actively measured or not. Common smart home oxygen piles have a fixed lifetime of a few years, and they're quite sizable (probably about as much volume as a whole smartwatch). Putting the same chemistry in an even smaller package would likely result in lifetime measured in hours
From my experience with working for defense/aerospace companies as well as civilian b2b ones in the US, the general situation is that defense/aero companies pay less but demands less of a grind. People usually take the lower pay (usually 70% of equivalent role in commercial sector) for the better culture
Yes you provide a great example of binning and market separation. Though I think in this case there's some limiting factors that make it infeasible to bin these fancy Noctua fan rotors including: 1) tooling have limited lifetime and will get sloppier and worse yields as time goes on. It's inefficient to use precious cycles of a precise tool and die on producing lower grade parts. 2) the material itself is likely more expensive than what industrial/lower grade use cases require. Why use reject Noctua when you can get regular crappy plastic for 1/500th the cost? 3) I expect Noctua stuff to be a much lower volume than lower cost/quality vendors so the volume of Noctua rejects is likely too low for a company to dedicate a product line using it. 4) brand/marketing reasons
Another obvious use case of binning is for microchips where the same die can be "wounded" to create multiple product variants that target different market segments, and also yield improvement from being able to isolate and disable an area of the die that are defective. However improving the manufacturability and yield itself is still fundamentally important
Probably true. Though as someone who can read both English and Chinese, I thought the translations in the article does a good job of representing the traditional vs modern grammar styles. Not sure what more explanation would be necessary
It seems like you largely agree with the article - people shall own nothing and be happy. Perhaps the artificially induced supply crunch could go on indefinitely.
Also, I wonder how many of us, even here on HN, have the ability to spend that amount of money on computer for personal use. Frankly I wouldn't even know what to do with all the RAM - should I just ramdisk every program I use and every digital thing I made in the last five years?
Anyhow, I suppose for the folks who can't afford hardware (perhaps by design), one ought to own nothing and be happy.
China has made for-profit extracurricular tutoring illegal since 2021. [1] Of course there can be under the table operations and discussion to be had about regionally biased gaokao difficulty, but I think it's worth recognizing gaokao being a real chance for upward class mobility, hence why it is so competitive.
It's also a bit unreasonable to launch live munitions that have some 90% probability of being intercepted by a given system on a good day, while intending for "just a warning"
There are many things that are valuable to people, but which they would rather not pay for. They include public goods and externalities, like infrastructure and education and a reasonable amount of military. It makes a lot of sense that people would rather enjoy art for free if they had the option, and since the majority of art experience can be easily duplicated and transmitted, why pay for it yourself? There is also another benefit of art stimulating further intellectual and creative development of a society, perhaps yielding second order benefits that are hard to quantify. Thus overall, it can make a lot of sense for government to pay for art as a society.
The escapement is "synchronous" in that the motion is controlled by the number of pulses applied to the motor over time rather than the duration/width of each pulse. The pulsetime constant is only to accommodate mechanical/analog differences with the driving circuitry, from what I understand. https://en.wikipedia.org/wiki/Lavet-type_stepping_motor
It's because the phone design needs the battery to help stabilize the voltage under load. As we know, digital devices can nearly instantaneously change the amount of current they consume and thus require layers of energy storage to accommodate the transient currents quickly. However, the changing current consumption doesn't just happen briefly. It sometimes continues to ramp for more than milliseconds (a glacial time frame for modern electronics). Thus generally every component in the power supply network of a design serves some stabilization and filtering role, including the batteries.
It appears that in this case, as the original battery aged, its internal apparent resistance (ESR) increased beyond the original design expectations, to a point where the phone won't work when plugged in to a charging cable because despite the charging cable most likely being able to deliver sufficient power at DC, it had too much impedance to supply it quickly enough. When current is demanded from a source that has too high impedance to supply it, the voltage drops. This will result in significant voltage ripple to the power supply of the digital circuits, which can cause logic to not function correctly.
Adding a large capacitor basically replaced the filtering and stabilization role of the original battery.
Interestingly people often intentionally remove capacitors for side channel measurements and glitching attacks.
There are modular dot shaped led matrix blocks that are basically LEDs under a cast piece of resin that guides light. They're tillable and you can drive them with an FPGA and a smart shift register based constant current driver. They're generic so you can look around online.
However this is assuming your installation will be reasonably large. If it's too big, I recommend making your own array out of discrete LEDs. They sell LEDs with a built in milky diffuser that are suitable.
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