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fsh

4,834 karma · joined February 23, 2019

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fsh··on Eat Real Food
My impression is that most nutritional research is just p-hacking on extremely noisy data. The only consistent outcome is that eating too much for an extended period of time is extremely unhealthy, regardless of what you are eating. Unfortunately, this runs contrary to the "more is better" mentality of US consumers who throw a hissy fit if food portions are not gigantic.
fsh··on Revisiting the original Roomba and its simple architecture
iRobot refused to incorporate LIDAR scanners, instead relying on some janky computer vision approach. Robots from Roborock and friends know their position with cm-accuracy at all times, whereas Roombas only have some vibe about which part of the building they are in. This makes them much less efficient at route planning and less reliable at adhering to exclusion zones.
fsh··on UK company sends factory with 1,000C furnace into space
As an ESA member state, the UK has had launch capabilities via Arianespace for a couple of decades.
fsh··on UK company sends factory with 1,000C furnace into space
The best silicon single crystals still contain impurities at the 1E-11 level. This project is about doing crystal growing in low gravity (the ultra-high purity is only achieved due to the growth process). The vacuum of space is a lot worse than what can be achieved in the lab, especially in low orbits.
fsh··on Tesla’s 4680 battery supply chain collapses as partner writes down deal by 99%
Tesla is probably the only EV maker with declining sales for the last two years. Quite a feat in a booming market, and remarkable considering that the stock already has a few orders of magnitude of growth priced in.
fsh··on Splice a Fibre
Fiber splicers are marvels of technology. They align the fiber cores with sub-micrometer accuracy and produce just the right amount of heat and pressure to melt the ends together. They are also usually very rugged, fully automated, and surprisingly cheap (a few thousand euros). It is remarkable what is possible when the entire internet relies on a technology.
fsh··on Asahi Linux with Sway on the MacBook Air M2 (2024)
I typically install and enable tlp [1], but that's it. Some distros/DEs might have it out of the box, but on Arch I had to do it myself.

[1] https://wiki.archlinux.org/title/TLP

fsh··on Asahi Linux with Sway on the MacBook Air M2 (2024)
This doesn't match my experience. My previous three laptops (two AMD Lenovo Thinkpads, one Intel Sony VAIO) had essentially the same battery life running Linux as running Windows.
fsh··on iOS 26.3 brings AirPods-like pairing to third-party devices in EU under DMA
Yes, this is called Bluetooth multipoint and has been common on non-Apple devices (for example Bose) for a few years now. Requires no logins and is vendor-agnostic.
fsh··on FPGAs Need a New Future
But Vivado doesn't get the job done. The intended workflow is to click around in the GUI until it (hopefully) synthesizes something. The state is then recorded in some proprietary project file that cannot be version controlled or shared with other developers. The workaround is to generate some unholy mess of tcl scripts that automate the clicking, such that one can start from scratch for each synthesis. The scripting mess breaks with each minor release of Vivado, so you need to either never update, or have a separate (~100 GB) Vivado installation for every single project. And if your chip is more than a home-gamer ZYNQ, you hopefully like paying subscription fees for the experience.
fsh··on Scientists create ultra fast memory using light
That's not true. Transistors were commercialized a few years after their invention, and already the first generation vastly outperformed vacuum tubes in size, weight, and power. Optical computing has been done for a few decades now with very little progress.
fsh··on Pebble Index 01 – External memory for your brain
Apple will proudly announce that they've invented the replaceable battery.
fsh··on I wasted years of my life in crypto
Indeed, most societies ended up inventing a mandatory trusted third party escrow called a "legal system" as part of a "state". They usually issue hard-to-copy tokens, solving the double spending problem.
fsh··on My car charger can boil water really fast [video]
There was no such thing in the UK. ChatGPT is trained to produce text that fulfills the user's expectations. If you put a prejudiced prompt in, expect a corresponding result.
fsh··on I wasted years of my life in crypto
It's an ingenious solution to achieve a "trustless" currency that prevents double-spending without a central authority. Unfortunately, this solves the wrong problem. Spending money usually involves getting a good or service in return, which inherently requires "trust" (as does any human interaction). Your fancy blockchain is not going to help you if you order something with Bitcoin and no package arrives.
fsh··on I wasted years of my life in crypto
GNU Taler is a working implementation of "digital cash" in the spirit of Ecash. Since it doesn't come with its own currency, it cannot be used for gambling. It is quite telling that it has seen essentially zero adoption in the "crypto" scene.
fsh··on HTML as an Accessible Format for Papers (2023)
No, it wasn't. Scientists at CERN used DVI and later PDF like everyone else. HTML has no provisions for typesetting equations and is therefore not suitable for physics papers (without much newer hacks such as MathML).
fsh··on Wolfram Compute Services
I quite like Sage. Python is a much better language than Wolfram (yes, he named it after himself...). In Wolfram, there is no real scoping (even different notebooks share all variables, Module[] is incredibly clumsy), no real control flow (If[] is just a function), and no real error handling. When Wolfram encounters an exception, it just prints a red message and keeps chugging along with the output of the error'd function being replaced by a symbolic expression. This usually leads to pages and pages of gibberish and/or crashes the kernel (which for some reason is quite difficult to interrupt or restart). Together with the notebook format and the laughable debugger, this makes finding errors extremely frustrating.

The notebooks are also difficult to version control (unreadable diffs for minor changes), and unit testing is clearly just an afterthought. Also the GUI performance is bad. Put more than a hand full of plots on a page, and everything slows to a crawl. What keeps me coming back is the comprehensive function library, and the formula inputs. I find it quite difficult to spot mistakes in mathematical expressions written in Python syntax.

fsh··on Wolfram Compute Services
Maybe with the power of a supercomputer, Mathematica can finally launch in less than 30s. I have no idea how a software that still does essentially the same thing as it did in 1988 can be that sluggish.
fsh··on Self-hosting my photos with Immich
My biggest worry with Immich is how to future-proof the albums. With photos sorted into folders, it should be no problem to access them in a couple of decades. With Immich, I have to rely on the software still working or finding some kind of tool to dump the database.
fsh··on BMW PHEV: Safety fuse replacement is extremely expensive
This is like comparing a Casio to a Rolex. Both do roughly the same thing, but the markets are completely different. Nobody buys a high-end luxury car like a Taycan because it makes financial sense. The manufacturers know this and price everything accordingly.
fsh··on Accepting US car standards would risk European lives
US car regulations are weirdly inconsistent. Sometimes they are incredibly strict. You can't have a convex left side mirror and the right one has to carry a stupid warning label. Importing non-antique foreign cars is practically impossible. But then, some obviously unsafe features, such as indicators in the same color as the rear lights, are perfectly legal.
fsh··on Datacenters in space aren't going to work
That's the point. Forced air cooling is way more efficient than radiative cooling.
fsh··on Datacenters in space aren't going to work
We have been relying on natural magnetic fields for over a billion years, so we can probably continue doing so for a while.
fsh··on Datacenters in space aren't going to work
Your hypothetical liquid metal heat pump would have a Carnot efficiency of only 25%.
fsh··on Datacenters in space aren't going to work
A sports car radiator has about that size and dumps 1 MW without boiling the coolant.
fsh··on WinApps: Run Windows apps as if they were a part of the native Linux OS
Yes, CAD software is perfectly usable via RDP.
fsh··on Copenhagenize Index 2025: The Global Ranking of Bicycle-Friendly Cities
I didn't even feel particularly safe as a pedestrian in Tokyo or Osaka. Despite the good public transport, Japanese cities have cars absolutely everywhere, even in tiny streets that should really be pedestrian zones. Paris is much better in my opinion.
fsh··on WinApps: Run Windows apps as if they were a part of the native Linux OS
Except these seamless modes have been broken for many years. Also using a containerized Windows means one doesn't have to fiddle with the insane Windows 11 setup process and TPM issues.
fsh··on WinApps: Run Windows apps as if they were a part of the native Linux OS
It's pretty good. They use XfreeRDP to remote into the container and display individual windows. This somehow performs a lot better than the GPU emulations of VirtualBox or VMware. I guess Microsoft put some effort into optimizing RDP for Terminal Server applications.
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