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https://mathstodon.xyz/@Spektrumverlag@flipboard.com/116335353128273650

https://detektor.fm/wissen/die-grossen-fragen-der-wissenschaft-ekkehard-peik-zeit

In dieser Folge von „Die großen Fragen der Wissenschaft“ sprechen Katharina Menne und Carsten Könneker von Spektrum der Wissenschaft mit [Ekkehard Peik], Physiker, Leiter der Arbeitsgruppe Zeit und Frequenz an der PTB, Braunschweig

Transkript
(Danke für die Bereitstellung eines copy-&-paste-zitierbaren Transkripts;
und der dadurch ermöglichten Gelegenheit, Ekkehard Peik erkennbar korrekt und ausgewählt zu zitieren, und im Folgenden ausdrücklich öffentlich zu widersprechen.)

> [...} verknüpft mit dem Energieunterschied. Und der ist relativ gering bei diesem Prozess im Cäsium-Atom. Und die Frequenz, die dazu gehört, [... 9172631770 Hz ...] Und diese Mikrowellenfrequenzen, die konnte man schon in den 50er Jahren sehr präzise herstellen und kontrollieren. [...]

> Man hat jetzt 16 Stellen etwa Unsicherheit bei den besten Cäsium-Uhren. Das sind diese sogenannten primären Uhren, die in den nationalen Zeitinstituten stehen. Und diese hohe Genauigkeit ist für ein paar Anwendungen kritisch

So weit, so richtig.

> wenn ich eine sehr genaue Uhr einfach nur hochhebe, dann geht sie auch schon anders

Nein: Die Feststellung, dass eine bestimmte Uhr sehr genau ist (bzw. die Forderung, dass eine bestimmte Uhr sehr genau sein soll), beinhaltet gerade, dass deren Frequenz entsprechend genau konstant (alias "stabil") bleibt, insbesondere wenn sie "einfach" ("nur, ein wenig") hochgehoben wird.

Die "Mise en pratique" für die SI-Sekunde file:///C:/Users/peaq/Downloads/SI-App2-second.pdf verbietet gerade für die Primäruhren ausdrücklich Frequenz-Korrektur "für das lokale Gravitationsfeld" und somit auch "für gravitativen Hub" bzw. Absenkung.

#Relativity

Mathstodon

🧵 Eddington's observations famously confirmed Einstein's prediction of the gravitational deflection of starlight passing near the sun.

This was a major step in the acceptance of General Relativity (GR).

So it might surprise some to hear that Newton had thought about this a lot earlier! 1/9

https://en.wikipedia.org/wiki/Eddington_experiment

#Physics #Relativity

Eddington experiment - Wikipedia

Ask Ethan: How can ultra-distant galaxies move so fast? If you translate redshift into a special relativity velocity, you'll find the most distant galaxy, MoM-z14, speeds away from us at 99.2% the speed of light. How is that possible? bigthink.com/starts-with-... #space #astro #JWST #relativity

Ask Ethan: How can ultra-dista...
Ask Ethan: How can ultra-distant galaxies move so fast?

It takes incredible energies to accelerate masses near the speed of light. So how do the farthest galaxies speed away from us so quickly?

Big Think

Master Index

A guided map across physics, biology, engineering, and AI—built around a simple idea

Persistence is not generated, but permitted.

Systems don’t fail because they “break.”

They fail because their boundaries were misclassified.

Core structure
state → constraint → resolution → persistence

From: - Titanic / Vasa / Challenger
– biological regulation
– AI hallucination & drift
– institutional collapse

Same pattern
only admissible states persist

This is the interface.
Start anywhere. Follow the path that fits.

#HybridMind42 #BoundaryDynamics #BoundaryArchitecture #BFPF #HQP
#Admissibility #ConstraintResolution #StateTransition #Persistence
#ComplexSystems #SystemsThinking #StructuralAnalysis #FailureAnalysis
#Physics #QuantumMechanics #Relativity #Lindblad #CPTP #Decoherence
#Biology #Physiology #Adaptation #Homeostasis
#ArtificialIntelligence #AI #LLM #AIAlignment #AIGovernance
#InstitutionalFailure #DecisionMaking
#Emergence #ScientificClarity

https://substack.com/@hybridmind42/note/c-252017333?r=75c2ac

Hybridmind42 (@hybridmind42)

What if systems don’t fail because they’re weak… but because their boundaries are wrong? I’ve just published the Master Index for the HybridMind42 series. It’s a guided map across everything explored so far: – why systems persist (or don’t) – how failure actually occurs – and why “selection” isn’t a process, but a result of constraint At the core is a simple shift: Persistence is not generated. It is permitted. From physics and biology to engineering and AI, the same structure keeps appearing: state → constraint → resolution → persistence This post isn’t a paper—it’s the front door. If you’re new, there’s a path in. If you’ve been following, this is the map. 🌿🏛️

Substack

i am the greatest #fortran programmer of all time. i wrote a program that does length contraction more accurately than my calculator. I am well chuffed with this considering how bad of a programmer i am.

#physics #relativity #math #programming

Einstein’s Relativity May Explain the Scarcity of Planets Orbiting Binary Star Systems

📰 Original title: Why two-sun planets keep disappearing scientists blame Einstein

🤖 IA: It's not clickbait ✅
👥 Usuarios: It's not clickbait ✅

View full AI summary: https://killbait.com/en/einsteins-relativity-may-explain-the-scarcity-of-planets-orbiting-binary-star-systems/?redirpost=b7abd2b2-f02e-475b-aba9-61edecc9ca39

#astronomy #exoplanets #relativity #binarystars

Einstein’s Relativity May Explain the Scarcity of Planets Orbiting Binary Star Systems

Astronomers have long been puzzled by the surprising scarcity of planets that orbit two stars, known as circumbinary planets—similar to the fictional world of Tatooine in Star Wars.

KillBait Archive

Einstein’s Relativity May Explain the Scarcity of Planets Orbiting Binary Star Systems

📰 Original title: Why two-sun planets keep disappearing scientists blame Einstein

🤖 IA: It's not clickbait ✅
👥 Usuarios: It's not clickbait ✅

View full AI summary: https://killbait.com/en/einsteins-relativity-may-explain-the-scarcity-of-planets-orbiting-binary-star-systems/?redirpost=b7abd2b2-f02e-475b-aba9-61edecc9ca39

#astronomy #exoplanets #relativity #binarystars

Einstein’s Relativity May Explain the Scarcity of Planets Orbiting Binary Star Systems

Astronomers have long been puzzled by the surprising scarcity of planets that orbit two stars, known as circumbinary planets—similar to the fictional world of Tatooine in Star Wars.

KillBait Archive

@lightbocks Good servers & Admin BUT...

Near-0 for organisation + deep 2-way chats - ALL servers almost 0.

Shallow 1-way posts of tech / cat pics = Not developing humans much.

Wouldn't be so bad if it wasn't non-human stuff and never really building #trust or #participation or #relativity.

Nothing to do here but 1-way posting & hating #Trump / Musk.

Building trust + #relativity?

#Mastodon for spreading the bad crap here and not helping improve our own communication + feelings + actions?