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Robert Chung

@rchung.bsky.social

Anti-social social scientist with low amusement threshold. When you do theoretical mathematical demography it's good to have a Plan B so I ride a bike.

415 Followers  |  196 Following  |  731 Posts  |  Joined: 03.08.2023
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Posts by Robert Chung (@rchung.bsky.social)

Cover of a book: "An Operational Necessity."

Cover of a book: "An Operational Necessity."

Who else remembers or has heard of prize-winning late 1960s novel 'An Operational Necessity,' by Gwyn Grffin?

It's about law-of-war consequences for WWII German U-boat crew that kills, rather than rescuing, crew members of a French boat it has torpedoed and sunk.

Worth reading again at the moment.

06.03.2026 17:32 β€” πŸ‘ 120    πŸ” 37    πŸ’¬ 12    πŸ“Œ 3
Preview
Exclusive: US investigation points to likely US responsibility in Iran school strike, sources say Military investigators believe it is likely that U.S. forces were responsible for an apparent strike on an Iranian girls' school that killed scores of children on Saturday, two U.S. officials told Reu...

Reuters Exclusive

"U.S. military investigators believe it is likely that U.S. forces were responsible for an apparent strike on an Iranian girls' school."

"The strike would rank among the worst cases of civilian casualties in decades of U.S. conflicts in the ​Middle East."

06.03.2026 02:50 β€” πŸ‘ 9975    πŸ” 5256    πŸ’¬ 624    πŸ“Œ 636

words filled a book
bombs filled a school gymnasium

06.03.2026 02:53 β€” πŸ‘ 291    πŸ” 17    πŸ’¬ 4    πŸ“Œ 1

β€œSlurs filled a chat” is a beaut

06.03.2026 02:52 β€” πŸ‘ 1630    πŸ” 197    πŸ’¬ 36    πŸ“Œ 9

INBOX: data from the U.S. Department of State Bureau of Population, Refugees, and Migrations show that in the most recent three months, every single one of the 1,651 refugees accepted into the United States were of (white) South African origin.

www.rpc.state.gov/documents/Re...

05.03.2026 20:04 β€” πŸ‘ 143    πŸ” 105    πŸ’¬ 9    πŸ“Œ 10

With all the attention this got, seemed worth building the proper solution: a local proxy that serves files directly to sites, data never leaves your computer.
New version + instructions: goldencheetah-web-viewer.pages.sweatstack.dev

05.03.2026 08:49 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

To be fair, I've lived through all that plus Hilary having her own email server, so there's that.

04.03.2026 14:21 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

(Though I made exactly that same comment about cycling analytics back before any of the current big apps existed: they were diving into a single ride's data when the big potential was looking at trends, patterns, and deviations from pattern across rides).

04.03.2026 11:25 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

(That's not about GC, it's about the world of cycling apps).

04.03.2026 11:22 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I sort of gave up on that, and export to R when I want to dive deep. I think, in general, too much effort is made on diving deeply into a single ride and not quite enough on looking at trends and patterns across rides.

04.03.2026 11:22 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

The probability of being found out is more of a deterrent than severity of punishment. This has implications for monitoring of potential bad behavior vs. coming down hard post-discovery. It's also related to "it's not the crime, it's the coverup."

04.03.2026 11:19 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Default GC can be a little intimidating, especially for newer users--but occasionally even for me. I just had a conversation with my dentist about all his (hand) tools. 90% of the time he grabs the same 3 tools. I've paid him enough to outfit his entire damn office and he uses 3 hand tools.

04.03.2026 10:25 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Hmmm. That's ... intriguing. Nice demo.

04.03.2026 09:29 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
GoldenCheetah Web Viewer by SweatStack

Imagine community-built dashboards, custom visualizations, training plan tools. All running in the browser, all powered by your local GoldenCheetah data. Here's the proof of concept: goldencheetah-web-viewer.pages.sweatstack.dev

04.03.2026 09:04 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 2    πŸ“Œ 1

Getting the US into avoidable disaster in Iraq took months and months and months.

In Vietnam, it took years and years and years.

We are just three days into this totally unnecessary, one-man's-whim fiasco.

03.03.2026 01:37 β€” πŸ‘ 616    πŸ” 106    πŸ’¬ 23    πŸ“Œ 1

Heads up US demographers. Our main NIH study sections (SSPA/SSPB) are being disbanded. I don’t know what this means. public.csr.nih.gov/StudySection...

03.03.2026 02:53 β€” πŸ‘ 23    πŸ” 17    πŸ’¬ 4    πŸ“Œ 0

No one could have foreseen.

02.03.2026 14:30 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

But to be fair, often I'm looking for things that stick out from the trend, not always the trend itself. Anyway, a change in slope is something that sticks out from a trend.

01.03.2026 15:15 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I often avoid parametric detrends at first; sometimes they work after I'm familiar with the reasons and sources of noise. When looking for a small change in something it's good to use techniques that don't enforce fit.

01.03.2026 15:09 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Trying to spot changes in the slope of a noisy trend can be hard. Sometimes it helps to remove the trend.

01.03.2026 05:56 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Salaire?

28.02.2026 20:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
The Birthrate Is Plunging. Why Some Say That’s a Good Thing.

Wise words from *Dr* Guzzo:
β€œWe spent decades shaming women for having kids under the wrong circumstances, for not having their ducks in a row,” said Ms. Guzzo, the demographer. β€œNow they are holding up their end of the bargain.”
www.nytimes.com/2026/02/27/u... @karenguzzo.bsky.social #demography

27.02.2026 20:54 β€” πŸ‘ 47    πŸ” 12    πŸ’¬ 1    πŸ“Œ 2

I was going to write, "FIFA wants its Peace Prize back," but actually FIFA doesn't really care.

28.02.2026 17:16 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The birthright citizenship IS an easy case. That’s the point. That’s the flex. β€œNo matter what rights you think you have, no matter how universally acknowledged you think they are, no matter how central to American values those rights are, WE decide whether or not you have those rights”……
/1

27.02.2026 15:28 β€” πŸ‘ 2911    πŸ” 722    πŸ’¬ 50    πŸ“Œ 52

The Washington Post's description of the bodycam video of his arrest last year, and the translation of Mr. Shah Alam's comments, is gutting. Remember, he was entirely blind in one eye and could only see three feet in the other, and he spoke virtually no English.

He spent a year in jail for this.

27.02.2026 01:01 β€” πŸ‘ 3965    πŸ” 1778    πŸ’¬ 72    πŸ“Œ 115
Preview
Breaking: Trans inmate's lawyers claim "egregious retaliation" in violation of court order Trans woman involved in a lawsuit challenging anti-trans policies says federal prison official told her on Feb. 22: β€œI don’t give a fuck what that judge says, I do what I want.”

β€œI don’t give a fuck what that judge says, I do what I want.”

The judge in question: Judge Royce Lamberth.

Let's see how this goes.

www.lawdork.com/p/trans-inma...

26.02.2026 05:53 β€” πŸ‘ 927    πŸ” 256    πŸ’¬ 18    πŸ“Œ 37

They beat a blind refugee who speaks no English for failing to obey police commands he could not understand. Then instead of apologizing, they charged him with possession of a β€œweapon”—HIS WALKING STICK. Then they dumped him miles from home without notifying anyone, after which he was found dead.

25.02.2026 20:48 β€” πŸ‘ 12649    πŸ” 6094    πŸ’¬ 56    πŸ“Œ 331

But ... he's been so very very transparent. The most transparent.

24.02.2026 22:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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In our new paper (BMJ Global Health), we systematically collected 923 historical growth studies covering 122 countries from 1814–2016.

By harmonising height-by-age data, we reconstruct stunting patterns over two centuries.

Link: doi.org/10.1136/bmjg...

5)

23.02.2026 18:18 β€” πŸ‘ 21    πŸ” 10    πŸ’¬ 2    πŸ“Œ 1
Post image Post image

Pretty amazing that comms person at FBI called my @ms.now colleague @kendilanian-nbc.bsky.social a liar and demand a correction only for Kash to post a photo from the locker room

22.02.2026 21:48 β€” πŸ‘ 21139    πŸ” 5928    πŸ’¬ 594    πŸ“Œ 293