petschge
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petschge
@longdouble.bsky.social
330 followers 210 following 39 posts
Plasma physics, mostly via kinetic simulations on supercomputers.

I occasionally (but not actually every day) post a "Paper of the Day" #potd that may or may not be related to my work.
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Reposted by petschge
nachristakis.bsky.social
I don’t carry “immigration documents” with me at all times. Americans have not had to produce “their papers” for police without cause. Is this the new standard, given Kavanaugh stops? reason.com/2025/12/31/d...
DHS says REAL ID, which DHS certifies, is too unreliable to confirm U.S. citizenship
It's the punch line to a bad joke that started 20 years ago when Congress passed the REAL ID Act.
reason.com
January 2, 2026 at 5:21 PM
Reposted by petschge
shivambhatt.bsky.social
Kikomancy- the magical art of using soy sauce to power spells
December 30, 2025 at 6:03 AM
Reposted by petschge
violetblue.bsky.social
This is incredible: CCC #39C3 (hacker conference in Germany) is doing CO2 room monitoring this year just like @kawaiicon.bsky.social so attendees can assess risk!

- Dashboard link: datagnome.de/sensors/#__t...
- Image/alt via @itgrrl.com
- Previously @wired.com - www.wired.com/story/this-h...
a dashboard screen showing current CO₂ levels in ppm (parts per million) for 15 rooms / spaces at the Chaos Computer Club’s 39C3 conference the levels are illustrated with tachometer-style indicators that are colour-coded using standard green (good) -> yellow (medium) -> red (bad) colour scheme correlating with the ppm measured in each room the raw ppm value for each room is also visible in the middle of its respective “tachometer”
December 28, 2025 at 11:40 PM
Reposted by petschge
ccc.de
Der #39C3 macht kurz Pause und freut sich unter neuem Namen #40C3 in ungefähr 361 Tagen wieder auf euch.
December 30, 2025 at 11:02 PM
Reposted by petschge
abbij1961.bsky.social
As of 12/24/25, USPS changed policy on when they postmark mail. Mail dropped off is no longer guaranteed a same-day postmark. Tax returns & other time-sensitive items are now stamped when they reach a regional processing center, which may be days later. Plan deadlines accordingly to avoid penalties.
USPS Announces Changes to the Postmark Date System
The United States Postal Service (USPS) has adopted a final rule (FR Doc.
share.google
December 29, 2025 at 4:32 PM
Reposted by petschge
nuclearanthro.bsky.social
Hans Bethe, the scientist who worked in both the Manhattan Project & USA H-bomb programs, wrote in 1983 a 40 page history called "The Story of Los Alamos."

It seems not to be publicly available online except where I have made it so, free for all: osf.io/thjpk

#NukeSKY

1/n
A screenshot of the first page of document by Hans Bethe labeled "The Story of Los Alamos." It is a scan of a weathered document and shows classification review marks and classification markings crossed out. On the right, going horizontally up the page, is a handwritten phrase reading "redacted version." The OCR of the first page is as follows: "the laboratory was established as the the last of the tour maJor proJeots in the atomic bomb program. the purpose ot the three earlier proJects vas to manufacture active materials which could be used in an atomic bomb. 'I'vo of themthe project of Dr. Lawrence at the University of California and of Dr. Urey at Columbia University vere concerned vith the separation of the active isotopes 235 from ordinary uranium using ~o different methods. The third, the Metallurgical La~ratory at Chicago, developed methods to produce the entirely new element plutonium by means of a nuclear reaction. All of these proJecte vere , in the Spring of 1943, at a stage of transition from re- " search to actual production. At this stage it seemed appropriate to establish a furthsr laboratory to investigate the actual construction ot an atomic bomb. ~is laboratory vas built at Los Alamos, near Santa Fe, Hew Mexico. As Director, General Groves who vas in over all charge of the atomic bomb project, appointed Dr. J.R. Oppenheimer, vell-known theoretical physicist from the University of California. The laborator1 vas first in tended to be quite small vith a total staff of one or two hundred. It aoon vas found that the problema in deaigning an atomic bomb were much too difficult and varied to be solved by such a small statf and the laboratory aoon grew to more than ten ti~es its original size"
December 28, 2025 at 11:39 PM
Reposted by petschge
nome.bsky.social
We didn't survive and thrive as a species because we had warriors or hunters - pretty much every omnivore can manage that.

We did so because we developed Grandmothers, and domesticated Dogs.

Community is what defines us as a species, and every "self-reliant" libertarian shitweasel be damned.
taliabhatt.itch.io Talia "Brown/Trans/Les" Bhatt ♀︎♀︎ @taliabhatt.itch.io · Nov 14
"my least woke opinion is---"

That's enough. We've had enough people indulging in the "thrill of a little conservatism", as a treat. Of considering reactionary thought to be a salacious and taboo in a world descending into reactionary mania.

Give me your MOST woke opinions. We're bringing it back.
December 28, 2025 at 5:00 AM
Reposted by petschge
brunodias.bsky.social
"Did you see what Mark Cuban posted? Oh did you see the clapb—"

You shake yourself awake in the cold North Atlantic water. You are not online. It is July of 1858. You are a baleen whale, and you have changed your mind. The future most not come to pass. The telegraph cable must break.
December 27, 2025 at 2:06 AM
Reposted by petschge
lookoutsantacruz.bsky.social
Powerful Christmas Day winds gusting up to 114 mph severely damaged UC Lick Observatory on Mount Hamilton, forcing the nearly 140-year-old facility to close while officials headquartered at UC Santa Cruz assess structural damage and begin repairs expected to take months.
Christmas Day winds up to 114 mph damage UC Lick Observatory
Powerful Christmas Day winds gusting up to 114 mph severely damaged UC Lick Observatory on Mount Hamilton, forcing the nearly 140-year-old facility to close while officials headquartered at UC Santa Cruz assess structural damage and begin repairs expected to take months.
buff.ly
December 26, 2025 at 8:00 PM
Reposted by petschge
cypherhippie.bsky.social
who’s at #39C3 and also interested in #atproto #didplc related meetups and workshops?

(or knows someone who might be?)

@atproto.science
@eurosky.social
@atprotocol.dev

@tgoerke.bsky.social
@wake.st
@renderg.host
@bmann.ca
@bnewbold.net
December 26, 2025 at 3:00 PM
Reposted by petschge
grauhut.bsky.social
Der Bundesinnenminister rät einer bayerischen Schule dazu, ein rechtskräftiges Urteil des Verwaltungsgerichtes zu ignorieren.

Rücktritt oder durch den VS beobachten lassen, weil er offenbar nicht die rechtsstaatlichen Grundsätze versteht.

www.news4teachers.de/2025/12/kruz...
Kruzifix: Schule ignoriert höchstrichterliches Urteil - mit Segen des Kultusministeriums - News4teachers
MÜNCHEN. Zwei Schülerinnen haben vor dem höchsten Verwaltungsgericht Bayerns Recht bekommen – und dennoch bleibt am staatlichen Gymnasium in Wolnzach
www.news4teachers.de
December 26, 2025 at 3:45 PM
Reposted by petschge
johnholbein1.bsky.social
DOGE was A LOT less likely to cancel contracts from companies that donated money to Republicans than companies that donated to Democrats.
December 25, 2025 at 10:47 PM
Reposted by petschge
barackobama.bsky.social
Merry Christmas! Michelle and I hope you have a wonderful holiday filled with light and joy.
December 25, 2025 at 4:01 PM
Reposted by petschge
planet4589.bsky.social
Space Force after a gap of some days has identified the dead Starlink 35956 again, showing its decaying orbit
December 26, 2025 at 2:22 AM
Reposted by petschge
saavikford.bsky.social
Ummm, should I be flattered or offended by this Christmas present? 😂🤣😂
Photo of a tshirt that reads (in white print on grey-green background): I don’t always roll a joint, but when I do it’s my ankle
December 25, 2025 at 7:00 PM
Reposted by petschge
alittlethought.bsky.social
To paraphrase Terry Pratchett:
Evil is when you treat people like things. Period. That's how it starts, and it leads to far worse.

Source: wist.info/pratchett-te...
A quote: “And sin, young man, is when you treat people like things. Including yourself. That’s what sin is.” “It’s a lot more complicated than that –” “No. It ain’t. When people say things are a lot more complicated than that, they means they’re getting worried that they won’t like the truth. People as things, that’s where it starts.” “Oh, I’m sure there are worse crimes –” “But they starts with thinking about people as things …” By Terry Pratchett (1948-2015) English author Discworld No. 23, Carpe Jugulum [Granny Weatherwax, Rev. Mightily Oats] (1998)
December 24, 2025 at 10:48 PM
Reposted by petschge
alpineinstitute.bsky.social
Resources for plus-sized people in #climbing.

#plussize #outdoorrecreation #rockclimbing

www.alpineinstitute.com/plus-sized-p...
Plus-Sized People in Climbing
Climbing is for every body—but bodies aren’t all the same, and that’s worth acknowledging honestly, especially for plus-sized climbers. With the right
www.alpineinstitute.com
December 24, 2025 at 6:45 PM
Reposted by petschge
dburbach.bsky.social
OK, I'll bite. Why is a single 35,000 ton battleship better for this role than 3 Arleigh Burke destroyers?
December 24, 2025 at 7:51 PM
Reposted by petschge
disabilitystor1.bsky.social
meanwhile, the Twitterati are calling for a ban on all travel from Europe
Amy Mek @AmyMek President Trump must act - now. It is time to impose a travel ban on most European countries, because Europe is no longer exporting tourists and allies - it is exporting the consequences of Islamic mass migration and civilizational collapse. We just saw it again. The man who carried out the attack at Brown University has been identified by police as a 48-year-old Portuguese national, whose last known address was in Miami, Florida. He was in the United States on a student visa. He was reportedly shouting the ISLAMIC WAR CRY - "Allahu Akbar" while killing two students at Brown and injuring many others. And the media wants you to believe this is an isolated incident. It isn’t. What they refuse to tell you is that Europe is already lost, not just the UK, Germany, France, and Sweden, but far beyond that. Spain is gone. Portugal is being overtaken. Belgium, the Netherlands, Italy, Austria, and large parts of Ireland are following the same path.
December 19, 2025 at 2:36 PM
Reposted by petschge
clancyny.bsky.social
Classic reply.

We spoke to Flock safety, the manufacturer of these cameras, about privacy concerns.

"How is that being addressed?" ABC7 News reporter Luz Pena asked.

"If you're not involved in a crime, you shouldn't be concerned about privacy," said Lily Ho, Public Affairs for Flock Safety.
serife.bsky.social Serife (Sherry) Wong @serife.bsky.social · 9d
Cop surveillance center in SF is funded by private donations by tech and crypto CEOs who also invest in these technologies. SF is where they can get their marketing tax deductible via testing out tech violence on those pushed down by the wealth gap they have created abc7news.com/post/how-sfp...
How SFPD's new investigation center is 'catching criminals faster' using 400 cameras, drones
The Real-Time Investigation Center is also known as R-TIC. At the center, SFPD investigators have access to 400 license plate reader cameras and more than 60 drones to fight crime.
abc7news.com
December 24, 2025 at 8:38 AM
Reposted by petschge
jeffasher.bsky.social
I count 10 cities in 2025 that are on track to have the fewest murders since at least 1970. Newark is on pace to have the fewest murders since 1956 (though only have data through Oct this year) and San Francisco is on pace to have the fewest murders since 1942.
December 23, 2025 at 7:06 PM
Reposted by petschge
johnpfaff.bsky.social
These declines are MASSIVE.

And the comparative silence in media coverage is absolutely DAMNING.

“Why are ppl always so afraid of crime?”

THIS is why. When crime goes up, media trips over itself to report it.

Falls to pre-war (!!) levels? Just CRICKETS.
jeffasher.bsky.social Jeff Asher @jeffasher.bsky.social · 9d
I count 10 cities in 2025 that are on track to have the fewest murders since at least 1970. Newark is on pace to have the fewest murders since 1956 (though only have data through Oct this year) and San Francisco is on pace to have the fewest murders since 1942.
December 23, 2025 at 10:03 PM
Reposted by petschge
mjsdc.bsky.social
NEW: By a 6-3 vote, the Supreme Court blocks Trump’s deployment of the National Guard to Chicago to assist immigration agents. A majority holds that he likely lacks authority to do so. Thomas, Alito, and Gorsuch dissent. www.supremecourt.gov/opinions/25p...
The Government asked this Court to stay the District Court's order. After the response and reply were filed, JUSTICE BARRETT referred the application to the Court. We directed the parties to file supplemental letter briefs on an issue that the District Court had addressed but the parties' initial briefs had not: the meaning of the term "regular forces" in §12406(3). In its supplemental brief, the Government argues that the term refers to civilian law enforcement officers, such as those employed by Immigration and Customs Enforcement or the Federal Protective Service. Respondents, echoing the District Court, maintain that the term refers to the regular forces of the United States mili-tary. We conclude that the term "regular forces" in §12406(3) likely refers to the regular forces of the United States mili-tary. This interpretation means that to call the Guard into active federal service under §12406(3), the President must be "unable" with the regular military "to execute the laws of the United States." Because the statute requires an assessment of the military's ability to execute the laws, it likely applies only where the military could legally execute the laws. Such circumstances are exceptional: Under the Posse Comitatus Act, the military is prohibited from "execut[ing] the laws" "except in cases and under circumstances expressly authorized by the Constitution or Act of Congress." 18 U. S. C. §1385. So before the President can federalize the Guard under §12406(3), he likely must have statutory or constitutional authority to execute the laws with the regular military and must be "unable" with those forces to perform that function.
December 23, 2025 at 8:16 PM
Reposted by petschge
mpsgoettingen.academiccloud.social.ap.brid.gy
Congratulations! 🥳
For re-examining and improving a 33-year-old reconstruction of #solarirradiance, #mpsgoettingen scientist Theodosios Chatzistergos received the #keesdejagerprize for best publication in the journal #solarphysics. The award was now […]

[Original post on academiccloud.social]
Two people present a framed certificate in front of a screen displaying text.
December 19, 2025 at 2:11 PM
Reposted by petschge
reporterherald.com
Huge Longmont climbing gym is closed for repairs after wind nearly tore the roof off trib.al/pN6w2lt
Huge Longmont climbing gym is closed for repairs after wind nearly tore the roof off
Owners of the Climbing Collective gym in Longmont, one of Colorado’s foremost climbing facilities, are hopeful they can reopen later this week after high winds ripped off roof panels last Fri…
trib.al
December 22, 2025 at 10:39 PM