Trevon Diggs expects to return to the field by September
https://www.nbcsports.com/nfl/profootballtalk/rumor-mill/news/trevon-diggs-expects-to-return-to-the-field-by-september?utm_source=flipboard&utm_medium=activitypub
Posted into Sports @sports-thenewsdesk
Trevon Diggs expects to return to the field by September
Cowboys cornerback Trevon Diggs' 2025 season appeared in doubt after he underwent chondral bone graft surgery on his left knee Jan. 23.Charean Williams (NBC Sports)
VDLM2 Message From: SE-RTC / D883AH
Message: HELLO MAINT. GENERATOR DRIVE DISCONNECT SWITCH LEFT IS MISSING SAFETY WIRE. SCCM PBE OUTER SEAL BROKEN. MANUAL RELEASE TOOL MISSING FROM AFT.
Area: Bavaria, Germany
Live Flight Tracker - Real-Time Flight Tracker Map | Flightradar24
The world’s most popular flight tracker. Track planes in real-time on our flight tracker map and get up-to-date flight status & airport information.Flightradar24
This Smart Basketball Tracks Data About Every Shot. It Could Be Headed to the NBA
https://www.wired.com/story/smart-basketball-tracks-every-shot-could-be-headed-to-the-nba/?utm_source=flipboard&utm_medium=activitypub
Posted into Gear & Gadgets @gear-gadgets-WIRED
@thygrrr @rmathematicus
Quaternions are here, absolutely, though in some descriptions they won’t be mentioned, but rather SU(2), which is a group made up of the unit quaternions
There are also spherical harmonics bursting out everywhere in the page I linked:
gregegan.net/SCIENCE/Ellipse/E…
That electrons are not like little planets is important, but all the symmetries of the *classical* Kepler problem leave an imprint on the quantum version.
- the latest version of my paper has a new section on quaternions (section 4.1):
This ends with an implicit question, namely how the quaternionic description of the hydrogen atom wavefunction in this section meshes with the quaternionic description at the end of section 6! I decided to put this version of the paper out there and worry about that question later. It involves some calculations that would be more fun to do working with @gregeganSF.
But I already know this: hydrogen atom wavefunctions are the same as functions
ψ: ℍ - {0} → ℍ
that obey the quaternionic analogue of the Cauchy-Riemann equations. Each such function is determined by its restriction to the unit sphere in the quaternions. Restricted to this sphere, we can think of such a function as a spinor field on the sphere, and we can express the hydrogen atom Hamiltonian in terms of the Dirac operator on the sphere.
Second Quantization for the Kepler Problem
The Kepler problem concerns a point particle in an attractive inverse square force. After a brief review of the classical and quantum versions of this problem, focused on their hidden $\text{SU}(2) \times \text{SU}(2)$ symmetry, we discuss the quantu…arXiv.org
I Lived With Alexa+ for a Week. Here’s How It Went
https://www.wired.com/story/alexa-plus-hands-on/?utm_source=flipboard&utm_medium=activitypub
Posted into Gear & Gadgets @gear-gadgets-WIRED
My #linocut #tiger for #GlobalTigerDay. Habitat loss is a great threat to these great cats. They are endangered after a century of decline and only about 4,500 remain in the wild. The good news is there are signs of an uptick in numbers globally but the need for habitat preservation is urgent.
#sciart #printmaking #conservation #printmaker #reliefPrint #InternationalTigerDay
#mastoArt
minouette.etsy.com/listing/850…
MAGA 'wants answers': Key investigator details Trump network's role in Epstein's plea deal
Investigative journalist Vicky Ward spent decades reporting on the deceased sexual predator Jeffrey Epstein, his rich and powerful associates, and the impact of his crimes.This is a rush transcript. Copy may not be in its final form.Amy Goodman (Alternet.org)
Carson Tyler, Josh Hedberg win U.S.' first men's diving medal at worlds in decade
https://www.nbcsports.com/olympics/news/carson-tyler-josh-hedberg-diving-world-championships-synchronized-platform?utm_source=flipboard&utm_medium=activitypub
Posted into Olympics @olympics-NBCSports
Carson Tyler, Josh Hedberg win U.S.' first men's diving medal at worlds in decade
Carson Tyler and Josh Hedberg took bronze in the synchronized platform at the World Diving Championships.Nick Zaccardi (NBC Sports)
Instead of giving into extortion, they should spend that money on lawyers to sue the Trump administration.
It was never applied equally, large powers such as China or Saudi Arabia didn’t face much blowback, yet there was a push for democracy & human rights around the world. It’s now gone.
Gift link.
theatlantic.com/ideas/archive/…
#democracy #giftlink #uspol
The Death of Democracy Promotion
Despots and human-rights abusers can rest easy now that America has gotten out of their way.Brian Klaas (The Atlantic)
Closing arguments set in trial of Colorado dentist accused of poisoning his wife
https://apnews.com/article/colorado-dentist-wife-poisoned-trial-craig-97da1f1a7d3eeed11318aa2af50d36ca?utm_source=flipboard&utm_medium=activitypub
Posted into U.S. News @u-s-news-AssociatedPress
7 unusual outdoor events, from the offbeat to the awe-inspiring
https://www.nationalgeographic.com/travel/article/action-filled-annual-events?utm_source=flipboard&utm_medium=activitypub
Posted into Travel @travel-NationalGeographic
7 unusual outdoor events, from the offbeat to the awe-inspiring
Pond skimming, sprinting in heels—these annual adventures range from death-defying to mundane.Cari Shane (Travel)
This guy, with his paw on my wheely chair leg.
#Clinger #greyhound #DogsOfTheFediverse #DogsOfMastodon
NFL employee seriously injured in deadly shooting at tower housing league's HQ
https://www.espn.com/nfl/story/_/id/45848952/nfl-employee-seriously-injured-deadly-shooting-tower-housing-league-hq?utm_source=flipboard&utm_medium=activitypub
Posted into Top Stories in Sports @top-stories-in-sports-thenewsdesk
NFL employee seriously injured in deadly shooting at tower housing league's HQ - ESPN
A National Football League employee was seriously injured in a shooting Monday at a midtown Manhattan building that houses the NFL's offices and some of the country's top financial firms, commissioner Roger Goodell said in a memo to employees.ESPN
reshared this
Lessons for Zohran Mamdani From New York’s Most Successful Socialist
https://www.politico.com/news/magazine/2025/07/29/zohran-mamdani-new-york-socialism-history-00480054?utm_source=flipboard&utm_medium=activitypub
Posted into Politics @politics-politico
Florida DOGE to audit Orange County government's budget. Here's what they're looking for -
If you need help with the Public File, call (407) 291-6000EUROPE SAYS
Ryne Sandberg dies at 65 as Cubs fans of an entire generation lose their favorite player
https://www.cbssports.com/mlb/news/ryne-sandberg-dies-at-65-as-cubs-fans-of-an-entire-generation-lose-their-favorite-player/?utm_source=flipboard&utm_medium=activitypub
Posted into Top Stories in Sports @top-stories-in-sports-thenewsdesk
Ryne Sandberg dies at 65 as Cubs fans of an entire generation lose their favorite player
Ryne Sandberg was the face of the Cubs in the '80s and '90sMatt Snyder (CBS Sports)
NYC shooting: What we know about the victims, suspect Shane Tamura aljazeera.com/news/2025/7/29/n…
NYC Shooting: What we know about the victims, suspect Shane Tamura
At least four killed, including an NYPD officer, and another critically wounded in the latest mass shooting in the US.Al Jazeera
The Corrupt Bargain Behind Gaza’s Catastrophe
https://www.theatlantic.com/international/archive/2025/07/corrupt-bargain-behind-gazas-catastrophe/683690/?utm_source=flipboard&utm_medium=activitypub
Posted into Global @global-TheAtlantic
The Corrupt Bargain Behind Gaza’s Catastrophe
Israel’s far right wants to take over Gaza. Netanyahu wants to stay in power.Yair Rosenberg (The Atlantic)
The Best Book Club Books of July
There's a look at queer life in modern Nigeria, a variety of witchiness (courtesy of Black conjure women and Silvia Moreno-Garcia), and more.
bookriot.com/the-best-book-clu…
indieauthors group reshared this.
Even assuming Trump is personally innocent, he still has a motive to cut a deal with Maxwell that leads to an eventual pardon. She might name prominent Democrats or other people to whom Trump is hostile.
Her “pattern” suggests she’ll say anything Trump wants her to say.
trib.al/MQ0Wr1P
Trump Is Teeing Up a Pardon of Epstein Accomplice Ghislaine Maxwell
Think he wouldn’t do it? Really? Did you also think he wouldn’t pardon the January 6 insurrectionists?The New Republic
Today we hiked along a gentle old logging road surrounded by greenery, and it felt very healing and peaceful.
.#AdventureDogs #dogs #DogsOfMastodon #PNW
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Message: I SEE SOME STORM CELLS STARTING TO FORM NORTH OF STL. HOW DOES THE FORECAST LOOK ON YOUR END...
Area: Gaithersburg, MD, USA
Live Flight Tracker - Real-Time Flight Tracker Map | Flightradar24
The world’s most popular flight tracker. Track planes in real-time on our flight tracker map and get up-to-date flight status & airport information.Flightradar24
France urges other countries to join it in recognising a Palestinian state
https://www.africanews.com/2025/07/29/france-urges-other-countries-to-join-it-in-recognising-a-palestinian-state/?utm_source=flipboard&utm_medium=activitypub
Posted into Africanews @africanews-euronews
France urges other countries to join it in recognising a Palestinian state | Africanews
Speaking at the UN on Monday, the French foreign minister called on the European Union to pressure Israel to agree to a two-state solution with the Palestinians.Africanews
If #Closeup toothpaste ever needed a street dog with the most perfect teeth, Barnabus Bhaskar is always available to model.
#barnabus #dogsofmastodon #streetdogs #dogs #TuesdayDog
Where to find free school supplies in New Orleans
https://www.axios.com/local/new-orleans/2025/07/29/free-school-supplies-new-orleans-metairie?utm_source=flipboard&utm_medium=activitypub
Posted into Business @business-AxiosNews
artist: Mathew Brady Studio, active 1844 - 1894
source: National Portrait Gallery
notes: The Frederick Hill Meserve Collection comprises more than five thousand […]
#Art #Design #Museum #Gallery #MastodonArt #MastoArt #Culture #Random
npg.si.edu/object/npg_NPG.81.M…
millennial falcon
in reply to Ulrike Franke • • •they are congruent when you acknowledge one party is comprised of systems, processes, and competent people all working together to get things right and the other party is a group of incompetent, lying, objectively evil criminals led by a felon with a lifelong history of organised crime based on dishonesty for dishonesty's sake.
in short: the liars are lying and the honest people are telling the truth.