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Animats commented on Equal Earth – Political Wall Map (2018)   equal-earth.com/index.htm... · Posted by u/bjelkeman-again
Animats · 8 minutes ago
Mandatory XKCD: "What your map projection says about you".[1]

[1] https://xkcd.com/977/

Animats commented on Children of the Geissler Tube (2023)   hopefulmons.com/p/childre... · Posted by u/paulkrush
kragen · 6 hours ago
Gas-discharge tubes are kind of niche today, and vacuum tubes have been more important since at least the 01920s, but in the 01960s, gas tubes weren't that niche; people used them for signal switching, voltage regulation, light detection, breakover elements for relaxation oscillators, digital displays https://en.wikipedia.org/wiki/Nixie_tube, counters https://en.wikipedia.org/wiki/Dekatron, and other memory devices. https://en.wikipedia.org/wiki/Neon_lamp#Applications has a bit of a catalog of uses, which references this actual catalog of devices from 01966 https://archive.org/details/ge-glow-lamp-manual-1966/page/n1... and Miller's 01969 book https://www.tiffe.de/roehren/neon.pdf. Geiger tubes are still used for detecting ionizing radiation, although we have other alternatives today. And of course most forms of electrical lighting have been gas discharge lamps since Davy invented the first commercial electric light around 01809: the open-air arc lamp, the neon lamp or tube, the fluorescent tube, the mercury light, low-pressure and high-pressure sodium-vapor lamps, strobe lights, and continuous high-intensity discharge xenon lamps.

The 01951 book I learned digital logic from, by Dennis Ritchie's father and two of his Bell Labs colleagues, has a chapter on switching with "electron tubes, both vacuum and gas-filled," and "semi-conductors": https://archive.org/details/TheDesignOfSwitchingCircuits/pag....

(Fluorescent light bulbs, by the way, do have a heated filament, and do work by thermionic emission, though cold-cathode fluorescents like those used in old LCDs don't.)

The respective niches of vacuum tubes and gas switching tubes could be very crudely summarized as high speed and high reliability. Even primitive vacuum tubes had switching times in the microseconds, and by WWII it was below a nanosecond, like transistors, but they relied on hot filaments that eventually burned out. Cold-cathode gas tubes, by contrast, essentially never break, but they take close to a millisecond for the gas to deionize so they can stop conducting. They can switch higher-frequency signals, but they can't switch on and off faster than that. Keister, Ritchie, and Washburn say of hot-cathode gas tubes:

> The speed of response of the tube is contingent primarily on the ionization and de-ionization times of the tube. Depending upon the gas, the ionization time ranges from a fraction of a microsecond to several microseconds; the de-ionization time is ordinarily of the order of a hundred to a thousand microseconds, though lower values have been achieved. The tube, then, can respond very rapidly to input signals applied to operate the tube, but considerably more time must be allowed for extinguishing the tube.

When I first read this when I was eight, "a hundred to a thousand microseconds" presumably sounded incredibly fast, but of course it's painfully slow for computation. Of cold-cathode tubes, they say:

> Moreover, since the cold-cathode tube has no filament, no standby current is consumed. The speed of response, though somewhat less than that of the hot-cathode gas tube, is sufficient for most applications. The ionization time depends upon the time necessary to transfer the discharge from the starter gap to the main gap, and it is generally less than a hundred microseconds. Main gap de-ionization times are of the order of one to ten milliseconds.

You might hope that this would have improved since 01951, but, as far as I can tell, it never did.

They continue:

> Because of its suitability to switching circuits, the electron tube circuit examples contained in the remainder of the chapter are, in the majority of cases, based on the cold cathode-tube.

(They do, however, include a few vacuum-tube circuits.)

The rest of the book is about relays. Vacuum tubes and semi-conductors were, from their point of view, niche.

Animats · 3 hours ago
Once upon a time, there were three branches in US electronics - Bell System, IBM, and everybody else. You're reading the Bell System viewpoint.

In the Bell System, most electronic components came in rectangular metal cans, often hermetically sealed, usually labelled "Western Electric NNNN Network". The Bell System loved inductors. Inductors don't wear out. They often used unusual inductors, such as saturable reactors, or inductors with a copper slug. For the same reason, they liked gas-discharge tubes, although they're not suitable for amplifying audio.

IBM liked plug in cards. Some cards in tabulating machines had moving parts connected to drive shafts. Tube computers had plug-in subassemblies.[1] This allowed maintenance of large machines in the field. Thyatrons were used in some early printers, as the drivers for the printer magnets. But not for logic - too slow.[2]

Everybody else had metal chassis with tubes on top and everything else underneath. Military gear would have extra hold-down arrangement for tubes, and often metal tubes, but usually stayed with the metal chassis form factor.

[1] https://www.righto.com/2018/01/examining-1954-ibm-mainframes...

[2] https://bitsavers.trailing-edge.com/pdf/ibm/logic/223-6746-1...

Animats commented on Determinants and causal effects of admission to selective private colleges [pdf] (2023)   nber.org/system/files/wor... · Posted by u/EvgeniyZh
Animats · 8 hours ago
Caltech does not have legacy admissions. So what happens? Here's the list of famous Caltech people, from Wikipedia [1]

Very impressive people, but unless you're in their field, you probably haven't heard of them. Some CEOs - Hughes Aircraft, Berkshire Hathaway (Munger, not Buffett), Intel, Quora, TRW, Union Carbide, Evans and Sutherland. Mostly high-tech companies of their time. Don't see any elected officials.

Caltech builds tomorrow's nerds, not tomorrow's leaders.

[1] https://en.wikipedia.org/wiki/List_of_California_Institute_o...

Animats commented on Children of the Geissler Tube (2023)   hopefulmons.com/p/childre... · Posted by u/paulkrush
Animats · 9 hours ago
Interesting. But not really the history of electronic tubes.

Geissler tubes are gas-discharge tubes. There's a whole family of those - neon lamps, gas-discharge rectifiers, thyatrons, ignitrons, krytrons, etc. Those were the first electronic devices with significant power-handling capacity. All have some gas inside that can be ionized. They usually don't have a heated filament, and don't work by thermionic emission. They're definitely the ancestors of fluorescent light bulbs. As power devices, they were used in specialty devices such as lamp dimmers (rarely, but I've seen one), motor controllers (rarely, but done during WWII), and, of all things, centrally controlled school clocks (IBM/Simplex). Niche.

Then there were vacuum tubes. Their genealogy starts with the Edison Effect (put an extra element in a vacuum light bulb, and there's some current flow), and go on to Fleming's diode and then De Forest's triode. At last, gain! These were all low-power devices, but they could amplify small signals. They made radio, TV, and computers go before semiconductors.

Gas-discharge tubes and vacuum tubes aren't that closely related. They work on different physical principles. During the tube era, they often came in the same tube packages, so people think they're similar.

Animats commented on Computer fraud laws used to prosecute leaking air crash footage to CNN   techdirt.com/2025/08/22/i... · Posted by u/BallsInIt
mindslight · 13 hours ago
They are not using logos to advertise their business. They are using footage of their business operations to promote their business. This footage happens to contain logos of other businesses, because those other businesses put their logos places where they might be incidentally filmed. Trademark law does not give one the right to police any time your logo appears, nor does it protect one from criticism.

Your analogy misses the mark. A more appropriate analogy would be someone taking a promotional selfie while walking down the street, which includes businesses' signs in the background.

Animats · 10 hours ago
One of the videos mentioned: "Speeding Trailer with 50,000lb of Melons Rolls Over & Rips Open"[1] It shows the practical problems of uprighting a trailer that's torn at the seams. There wasn't enough structural integrity left for a simple crane lift. So they needed inflatable air bags, wooden blocks, and multiple cranes to get the thing upright. Then they moved it a bit with the cranes to unblock a lane of the freeway ramp. Then it took tens of people from CALTRANS to unload 50,000 pounds of melons so the damaged trailer could be removed empty as one piece.

Everything that could identify the trucking company or even the source of the melons was blurred out, which is a lot of work for the towing company guy who does these videos between tow jobs.

There's no copyright issue; all pictures were taken by employees of the towing company.

There's no trademark issue; showing a logo for identification purposes is legal.

There's no customer confusion issue; it's clear that the towing company isn't in the melon business.

There's no trade secret issue; this was a very public event, on public property, with TV news coverage.

There's no intent to defame issue; the towing company was there because the California Highway Patrol called them to clean up the mess, not because someone didn't like the guy who rolled over his truck.

There's no right of publicity issue for a wrecked truck.

There's no ownership right to the video because the trucker didn't contract with the towing company; the California Highway Patrol did. (The trucker will be getting a big bill from the state.)

There's no issue of "interfering with police" - the cops called in the towing company and guided them to the scene.

There's nothing in IP law that applies here.

Just fear of YouTube.

[1] https://www.youtube.com/watch?v=1M5RnQlSJ58

Animats commented on The F-35 is losing the trade war   jalopnik.com/1945910/f-35... · Posted by u/rntn
Animats · 12 hours ago
It's a real issue. The overall world reaction to Trump's policies has been to take steps to do without the US. That's just getting rolling, but it's happening. Canada exports oil to China now.[1] China's trade with Asia is up, and trade with the US is down.[2] Supply chains are slowly changing to cut the US out of the loop. The US is seen as an unreliable trading partner.

It's hitting software. "Dutch Parliament Calls for End to Reliance on US Software".[3]

[1] https://www.ualberta.ca/en/china-institute/research/analysis...

[2] https://newsinteractives.cbc.ca/features/2025/canada-interna...

[3] https://www.usnews.com/news/technology/articles/2025-03-18/d...

Animats commented on I hacked Monster Energy   bobdahacker.com/blog/mons... · Posted by u/speckx
bko · 14 hours ago
This is from the post:

> "Monster Green shoppers are likely younger (Gen-Z/Millennial/Gen-X) male, lower income & Caucasian (skews Hispanic)."

Later in the post:

> The scariest part wasn't the training portal or the questionable customer profiling.

Questionable customer profiling is just basic research about their customers.

Seriously, I wish more companies were honest at least internally who their customers are. A lot of problems could be solved if places like Marvel realized who their core base is, accepted it, and made products for their audience.

Animats · 13 hours ago
Marvel's movie business was, for decades, run by the toy business in New York.[1] The movies were optimized for selling the merch. The Hollywood end finally broke free of the New York based "Creative Committee" once film revenue became large enough. The core base for merch is young boys, and that shaped the films.

[1] https://www.goodreads.com/book/show/77264987-mcu

Animats commented on Robots can now learn to use tools just by watching us   techxplore.com/news/2025-... · Posted by u/geox
Animats · 13 hours ago
This is huge. There's been so little progress on manipulation over the years. The 1960s Stanford AI lab videos don't look much worse than current work.

Part of the trick here seems to be using Gaussian splatting as an intermediate form for vision data. That's a new idea. Gaussian splatting is a brute-force process that doesn't try to generate a full 3D model reconstruction or object recognition. It can be applied to any visual scene where at least two viewpoints are available.

This just might get robotic manipulation unstuck. Good target for VC funding.

Animats commented on Mail Carriers Pause US Deliveries as Tariff Shift Sows Confusion   bloomberg.com/news/articl... · Posted by u/voxadam
Scoundreller · a day ago
There's two elements to this:

1. Removal of de minimis / low-value duty free exemption. Plenty of countries have very low thresholds to start collecting sales tax on imports. A moot point as a lot of platforms (Etsy/Amazon/Ebay/Aliexpress/Temu) charge the destination's US/EU/Aus sales taxes already. Usually a higher threshold to start collecting duty. Duty is much more cognitively difficult to assess. Historically, sales taxes were more than duty for most items anyway. US is now another exception here.

2. US not accepting "duty-unpaid" postal shipments. This is VERY unusual.

As of today, I can walk into the post office and send a parcel to any country in the world. The destination customs will figure out if/what duty/taxes are owed and collect it from the recipient. I don't need to know, nor care, what the rates are in Zimbabwe, Pakistan, Colombia or San Marino. The buyer should know and can complain to their gov if it's unreasonable/incorrect.

Next month, USA will be the sole exception to that. Air freight to USA is going to get a lot cheaper if anyone is looking.

Animats · a day ago
> US not accepting "duty-unpaid" postal shipments. This is VERY unusual.

To maintain the illusion that the sender pays for tariffs?

Keep receipts and customs declarations on everything imported. There's a lawsuit underway and it may well be decided that Trump doesn't have the authority to levy tariffs at all under the Emergency Economic Powers Act. In that case, importers will be due a refund.[1] The Constitution says that Congress sets tariffs and the Emergency Economic Powers Act doesn't mention tariffs. As usual, Trump's strategy is to stall, probably until 2026 when this is expected to reach the Supreme Court. Congress could enact Trump's tariff schedule to resolve this, but that would lock it into law.

[1] https://www.reuters.com/legal/government/what-happens-next-u...

Animats commented on Computer fraud laws used to prosecute leaking air crash footage to CNN   techdirt.com/2025/08/22/i... · Posted by u/BallsInIt
Animats · a day ago
This encourages self-censorship, or what's called "anticipatory obedience".

YouTube has become much worse about censorship. Pepe's Towing, LA's main towing company for major truck accidents, complains that YouTube took down some of their videos. Their videos are simply detailed coverage of the complex but effective process by which large vehicles that had accidents are lifted, rotated upright, placed on their wheels or on a large dolly as necessary, and towed away. Their people wear body cams, like cops, their cranes have cameras, and sometimes they use a DJI drone. (They bring out the drone when someone drives off an embankment and they need to plan a difficult lift.) The main purpose of all the video is to settle arguments with insurance companies over the cost of recovery. But they started a YouTube channel for PR purposes.

Almost all this video is taken on public property on LA county roads and freeways, with the cooperation of the cops, CALTRANS, local fire departments, and other organizations that clean up other people's messes. These are very public activities, with traffic streaming by and sometimes news helicopters hovering overhead. Totally First Amendment protected. Not a violation of YouTube's stated policies.

So what's the YouTube censorship about? Preventing corporate embarrassment. Their older videos have clear pictures of truck doors with ownership info. Container markings. License plates. Pictures of damaged goods. Now. out of fear of being cancelled by YouTube, they're blurring everything identifiable. Recently someone rolled over a semitrailer full of melons, and they blurred out not just the trucking company info, but the labels on the melons. Which the people from Pepe's say is silly, but they don't want to fight with YouTube.

u/Animats

KarmaCake day154815September 8, 2014
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