Tootfinder

Auf der #cordi hat sich auch die CC-BY-US-Gruppe vorgestellt, die an der Vermittlung eines #culturalchange beim Teilen von #Forschungsdaten und der Nutzung digitaler

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Weekend #Plankton Factoid 🦠🦐
This is the phyllosoma larva of a Spiny "Rock" Lobster, which can spend as much as a year drifting in the plankton.
#MarineBiology #science

Charmonium spectrum and its decay properties
Zaki Ahmad, Ishrat Asghar, Bilal Masud, M. Atif Sultan
https://arxiv.org/abs/2508.17841 https://arxiv.org/pdf/…

Charmonium spectrum and its decay properties
In this work, we have calculated the mass spectrum, radiative decays, and strong decays of charmonium (cc) by using the non-relativistic quark potential(NRQP) model. The wave functions are calculated by solving the radial Schrodinger equation numerically, which are further used to compute the radiative decay widths of (cc) states. The 3P0 model is used to calculate the strong decay widths by using the simple harmonic (SHO) wave functions. The SHO parameter \b{eta} values for different cc states…

Coclass of the second 3-class group
Siham Aouissi, Daniel C. Mayer
https://arxiv.org/abs/2508.17510 https://arxiv.org/pdf/2508.17510

Coclass of the second 3-class group
By means of parametrized presentations of finite metabelian 3-groups, it is proved that the coclass cc(M) of the second 3-class group M=Gal(F_3^2(K)/K) of any algebraic number field K with elementary bicyclic 3-class group Cl_3(K)=(3,3) is determined unambiguously by the second largest order ord(Cl_3(E_2))=3^{cc(M)+1} among the four 3-class groups of the unramified cyclic cubic extensions E_i (i=1,..,4) of K. Minimal discriminants of quadratic and cubic fields K with assigned coclass cc(M) are …

Largest study of its kind shows AI assistants misrepresent news content 45% of the time – regardless of language or territory https://www.bbc.co.uk/mediacentre/2025/new-ebu-research-ai-assistants-news-content

Polaritonic Coupled Cluster Theory for Unpolarized Cavities Exploiting Point Group Symmetry
Laurenz Monzel, Stella Stopkowicz
https://arxiv.org/abs/2507.19180 https://

Polaritonic Coupled Cluster Theory for Unpolarized Cavities Exploiting Point Group Symmetry
We introduce a generalization of the quantum electrodynamic coupled cluster (QED-CC)wave function ansatz, to describe the strongly coupled light-matter system in an unpolarized optical Fabry-Pérot cavity. This is achieved by explicitly treating two cavity modes in our calculation with perpendicular polarizations and demonstrate that this ansatz preserves the symmetry of an unpolarized cavity. Furthermore, exploiting point-group symmetry enables the assignment of polaritonic excited states as w…

Unitary Coupled-Cluster theory for the treatment of molecules in strong magnetic fields
Laura Grazioli, Marios-Petros Kitsaras, Stella Stopkowicz
https://arxiv.org/abs/2507.19270

Unitary Coupled-Cluster theory for the treatment of molecules in strong magnetic fields
In Coupled-Cluster (CC) theory, unphysical complex energies may arise in the presence of strong magnetic fields, near conical intersections, or in systems exhibiting complex Abelian point group symmetries. This issue originates from the non-Hermitian nature of the CC energy expression. A promising solution is provided by unitary Coupled-Cluster (UCC) theory, which retains the advantages of an exponential parameterization while ensuring real-valued energy eigenvalues. In this work, we present an…

This is something we should all be pondering: Big tech has most of my email, because it has *all* of yours: https://mako.cc/copyrighteous/google-has-most-of-my-email-because-it-has-all-of-yours

Time For 9 o'clock #HashTagGames hosted by @… Let's play!
#JunkDrawerASongOrPoem

Heute vor 12 Jahren: Am 26.09.2013 entdeckte NRG beim #Petten High Flux Reactor (HFR) eine mechanische Schwachstelle der Steuerstäben. Drei von sechs Steuerstäben wiesen ähnliche Defizite auf. Nach Analysen und Verbesserungen nahm der Reaktor am 14.02.2014 wieder den Betrieb auf.

Posting a photo to show support for @…
Colour of autumn
Larger version can be found at https://www.flickr.com/photos/stephen_rees

Big Tech and finance companies are telling H-1B employees to get to the US in under 24 hours https://www.businessinsider.com/big-tech-employees-h-1b-visa-travel-return-trump-eo-2025-9

🦾 Meet the teens behind RedSnapper: a smart Arduino-powered prosthetic arm
https://blog.arduino.cc/2025/08/21/meet-the-teens-behind-redsnapper-a-smart-arduino-powered-prosthetic-arm/

Meet the teens behind RedSnapper: a smart Arduino-powered prosthetic arm | Arduino Blog
An affordable, AI-assisted, wearable robotic arm? That’s not science fiction – it’s RedSnapper, an open-source prosthesis built by PAC Tech, a team of high school students from Istituto Maria Immacolata in Gorgonzola, Italy. Powered entirely by Arduino boards, their project won the national “Robot Arm Makers” title at the 2025 RomeCup – and we think […]

Procrastinated it for a long time but given the world we live in, I added an "AI and content policy" to my website: https://tante.cc/ai-and-content-policy/

AI and content policy
Nothing I write, present or otherwise attribute to myself is generated by or created with the help of so-called “AI” systems (specifically generative “AI” systems like LLMs). I will explicitly mark “AI” generated content and will only use it if it is necessary to make a point about said content or the system generating it. […]

Club SupSup: Tapas Pop-Up
Wednesday, August 13, 2025 5:00 PM 
Sunday, July 19, 2026 9:00 PM
Junction Tapas & Wine Bar
710 Pine Street Paso Robles, CA, 93446
https://chefcandice.com/events-cc/tapaspopup

Club SupSup: Tapas Pop-Up — Chef Candice Custodio
Club SupSup: The Tapas Pop-Up Join for an unforgettable night of bold bites, playful plating, and late-night flavor at this special Club SupSup pop-up. Inspired by Spanish tapas culture, California street food, this one-night-only experience brings together seasonal Central Coast ingredients and no

#NoKings #Berlin
https://www.mobilize.us/nokings/event/842166/

Heute vor 31 Jahren: Am 25. August 1994 wurde im #Kernkraftwerk #Barsebäck ein schwerwiegender Mangel entdeckt. Die Schmierung der Notkühlsystem-Pumpen war unzureichend, was im Ernstfall zu Schäden geführt hätte.

Kennt ihr diese Skulptur?

Covariance-Corrected WAIC for Bayesian Sequential Data Models
Safaa K. Kadhem
https://arxiv.org/abs/2509.17980 https://arxiv.org/pdf/2509.17980

Covariance-Corrected WAIC for Bayesian Sequential Data Models
This paper introduces and develops a theoretical extension of the widely applicable information criterion (WAIC), called the Covariance-Corrected WAIC (CC-WAIC), that applied for Bayesian sequential data models. The CC-WAIC accounts for temporal or structural dependence by incorporating the full posterior covariance structure of the log-likelihood contributions, in contrast to the classical WAIC that assumes conditional independence among data. We exploit the limitations of classical WAIC in th…

This evening I have been listening to one of @… 's podcasts and thinking about my failure in trying to lead the village's planning working group, and about the cognitive dissonance underlying my Tricycle project. I suspect this essay will be a grim read; it's not well formed in my mind as I sit down to write.

Heute im @… (https://mastodon.social/@schwarzPhotoBot/115065697236869104) : der Lindencorso. Der Lindencorso hat sogar eine

Wikimedia Commons Picture of the Year
By Diego Delso, CC-BY-SA
https://commons.wikimedia.org/wiki/Commons:Picture_of_the_Year/2024/Results/All

Replaced article(s) found for cs.CC. https://arxiv.org/list/cs.CC/new
[1/1]:
- Power of Counting by Nonuniform Families of Polynomial-Size Finite Automata
Tomoyuki Yamakami

Weekend #Plankton Factoid 🦠🦐
Meroplankton is a grouping of "temporary zooplankton" that only spend a portion of their life cycle there. One example is the nauplius larvae of barnacles. Though they don't look like it, barnacles are crustaceans, so they have nauplius stage for dispersal. They have very distinctive "horns" and are extremely common in plankton samples, wh…

Exclusive: Confidential informants exposed in Louisiana sheriff’s office hack
https://san.com/cc/exclusive-confidential-informants-exposed-in-louisiana-sheriffs-office-hack/

Exclusive: Confidential informants exposed in Louisiana sheriff’s office hack
Data stolen by a ransomware gang has exposed highly sensitive information from a Louisiana sheriff’s office, including names of informants.

4 out of 5 US troops surveyed understand duty to disobey illegal orders:
"'…moral injuries of this operation, I think, will be enduring,'…National Guard member…deployed to quell public unrest over immigration arrests in Los Angeles told The New York Times. 'This is not what…military of our country was designed to do, at all.'"
"…when some troops disobey – even indirectly – others can more easily find…courage to do the same."

Heute vor 72 Jahren: Am 26. Oktober 1953 fand in Emu Field, South Australia, der zweite #Atomtest der britischen Operation #Totem statt. Diese Tests legten den Grundstein für weitere Fortschritte im britischen Atomprogramm.

Reduced complexities for sequences over finite alphabets
John M. Campbell, James Currie, Narad Rampersad
https://arxiv.org/abs/2509.16034 https://arxiv.org…

Reduced complexities for sequences over finite alphabets
Letting $w$ denote a finite, nonempty word, let $\text{red}(w)$ denote the word obtained from $w$ by replacing every subword $s$ of $w$ of the form $cc \cdots c$ for a given character $c$ (such that there is no character immediately to the left or right of $s$ equal to $c$) with $c$. Complexity functions for infinite words play important roles within combinatorics on words, and this leads us to introduce and investigate variants of the factor and abelian complexity functions using the given red…

Hmm - installed the Safari update that was in the settings app on my MacOS 15.7 MacBook Pro and now I can’t close tabs by clicking the X on them, nor click and alter the path. I can use Command-W to close just fine.
Odd...
#Mac #Safari
cc @…

Papers Club is next week! We are reading “The Third Place” by Ramon Oldenburg and Dennis Brissett. We convene at 6 PM on Monday, August 25th at Victory Cafe, 440 Bloor St. W., and will get started discussing the paper about a half an hour later. /cc @…
Link to the paper:

I’m amazed that the FOSM site is still alive.
#OpenStreetMap and was created by folks who didn’t want OSM to switch to ODbL away from CC BY-SA back in 2012. If y…

From 5G RAN Queue Dynamics to Playback: A Performance Analysis for QUIC Video Streaming
Jashanjot Singh Sidhu, Jorge Ignacio Sandoval, Abdelhak Bentaleb, Sandra Cespedes
https://arxiv.org/abs/2508.15087

From 5G RAN Queue Dynamics to Playback: A Performance Analysis for QUIC Video Streaming
The rapid adoption of QUIC as a transport protocol has transformed content delivery by reducing latency, enhancing congestion control (CC), and enabling more efficient multiplexing. With the advent of 5G networks, which support ultra-low latency and high bandwidth, streaming high-resolution video at 4K and beyond has become increasingly viable. However, optimizing Quality of Experience (QoE) in mobile networks remains challenging due to the complex interactions among Adaptive Bit Rate (ABR) sch…

Trauer-Hysterie um Rechtsradikalen: Warum Charlie Kirk kein Märtyrer ist - Nach seinem gewaltsamen Tod wird der rechtsradikale Aktivist Charlie Kirk zum „Heiligen“ und „Märtyrer“ erklärt. Seine Botschaften und Methoden aber sind dessen unwürdig.
Philipp Greifenstein #USA#Trump #Demokratie

Warum Charlie Kirk kein Märtyrer ist | Die Eule
Foto: Gage Skidmore (CC BY-SA 2.0). Nach seinem gewaltsamen Tod wird der rechtsradikale Aktivist Charlie Kirk zum „Heiligen“ und „Märtyrer“ erklärt. Seine Botschaften und Methoden aber sind dessen unwürdig.

Heute vor 71 Jahren: Am 26. Oktober 1954 führten die #UDSSR in Semipalatinsk, Kazakhstan den 17. #Atomtest durch. Die Freifallbombe (atmosphärischer Test), diente der Waffenentwicklung. 1954 fanden in der UDSSR insgesamt 10 Atomtests statt.

The ideas that finally bubbled up to the surface in The Point of No Return last night have been festering in the back of my brain for months. Because, although it's a bit inchoate, it's only saying out loud what most of us already know.
The job now is no longer to turn the ship around. We don't have the wheel, and those who do will not listen.
The task now is to build lifeboats. To build resilient spaces in which fragments of humanity can survive.

The Point of No Return
I can't stop climate change by myself. I can't create a sustainable future for my village by myself. To do either of these things, everyone else needs to work together. But badgering people, being frustrated with people, being angry with people (and yes, I am angry — very angry — with people I know, and like, and respect, very much) doesn't motivate them to work together. My very frustration, my very sense of urgency, makes me a liability. I should stop.

Time For 9 o'clock #HashTagGames hosted by @…
In the spirit of the season, Let's play!
#FactCheckAShowOrFilm

The Utopia of “AI” is the Dystopia of never being touched by anything.
(Original title: Friction and not being touched)
https://tante.cc/2025/07/30/friction-and-not-being-touched/

I've been mesmerised for the past few days by the collaborative music and VJ-ing tool at nudel.cc. There are a bunch of videos on the youtube channel of coder/artist @ TodePond@mas.to and this one here starts out with a tutorial of how the sound engine works:
https://www.youtube.com/watch?v=Jr4ACMrRq_8

Interesting question on road.cc: is there a bit of road that you just hate #cycling on?
For me, a short stretch of southbound Mearns Rd at Mearns Kirk. Slight rise, poor surface, from Eaglesham Rd to the roundabout:
https://www.…

OpenStreetMap
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.

Testing Gauss-Bonnet Gravity with DESI BAO Data
Praveen Kumar Dhankar, Dalale Mhamdi, Albert Munyeshyaka, Darshan Kumar, Joseph Ntahompagaze, Taoufik Oualib
https://arxiv.org/abs/2508.03602

Testing Gauss-Bonnet Gravity with DESI BAO Data
In the present paper, we observationally constrain f (G) gravity at the background level using Type Ia supernovae from the Pantheon Plus (PP) sample, cosmic chronometer (CC) data, and the recent Baryon Acoustic Oscillation (BAO) measurements released by DESI. For the analysis, we consider two combinations of datasets: (i) PP + CC, and (ii) PP + CC + DESI BAO. In both cases, we determine the best-fit parameters by numerically solving the modified Friedmann equations for two distinct f (G) models…

Where do people publish images such that they are citable, FAIR and browsable?
I‘d like to publish my drawings under a CC-BY license for reuse but I am struggling finding a good place for that.
#FAIRprinciples

Lt. einer #Forsa-Umfrage befürwortet eine knappe Mehrheit der Deutschen, dass die #Ukraine für Frieden Gebiete an #Russland abtritt. Besonders hohe Zustimmung gab es bei AfD-Wählern

The demographics of core-collapse supernovae I. The role of binary evolution and CSM interaction
Andrea Ercolino, Harim Jin, Norbert Langer, Avishay Gal-Yam, Abel Schootemeijer, Caroline Mannes
https://arxiv.org/abs/2510.04872

The demographics of core-collapse supernovae I. The role of binary evolution and CSM interaction
The observational properties of core-collapse supernovae (CC-SNe) are shaped by the envelopes of their progenitors. In massive binary systems, mass-transfer alters the pre-SN structures compared to single stars, leading to a diversity in SN explosions. Aims. We compute the distribution of CC-SN properties based on comprehensive detailed grids of single and binary stellar evolution models. We conduct a grid-based population synthesis to produce a synthetic population of CC-SNe, and compare it to…

Weekend #Plankton Factoid 🦠🦐
An interesting survival mechanism of zooplankton is the production of resistant resting or diapause eggs. Calanoid and harpacticoid copepods, rotifers, and cladocerans (as ephippia) do this when conditions are poor due to overcrowding, predation, drought, or water quality. These eggs can hatch after decades or even centuries in an egg bank. This helps to explain …

A Note on Eigenvalues of Perturbed Hermitian Matrices
Chi-Kwong Li, Ren-Cang Li
https://arxiv.org/abs/2508.08203 https://arxiv.org/pdf/2508.08203

A Note on Eigenvalues of Perturbed Hermitian Matrices
Let $$ A=\left(\begin{array}{cc} H_1 & E^*\\ E & H_2\end{array}\right) \quad \hbox{ and } \quad \wtd A=\left(\begin{array}{cc} H_1 & O\\ O & H_2\end{array}\right)$$ be two $N$-by-$N$ Hermitian matrices with eigenvalues $λ_1 \ge \cdots \ge λ_{N}$ and $\wtd λ_1 \ge \cdots \ge \wtd λ_N$, respectively. \iffalse There are two kinds of perturbation bounds on $|λ_i - \wtd λ_i|$: $|λ_i- \wtd λ_i| \le \|E\|$, where $\|E\|$ is the largest singular valu…

#Jujutsu version control in live use during a demo at #OpenSSLCon25 in Prague by @… from Tampere University!
Cc @…

Die RISM-Ländergruppe Deutschland und die @… laden vom 13.–14.11.2025 zur interdisziplinären Tagung „Musikdrucke im digitalen Wandel. Perspektiven ihrer Dokumentation, Repräsentation und Vernetzung“ nach Dresden ein. Fachvertreter*innen aus Musik-, Buch-, Informationswissenschaft und Kunstgeschichte werden zum Umgang mit historischen Musikdrucken im di…

Oh fun find, there was actually something called Oxide in the history of #Rust already - a formalization attempt:
https://arxiv.org/abs/1903.00982 🦀
cc @…

Oxide: The Essence of Rust
Rust claims to advance industrial programming by bridging the gap between low-level systems programming and high-level application programming. At the heart of the argument that this enables programmers to build more reliable and efficient software is the borrow checker - a novel approach to ownership that aims to balance type system expressivity with usability. And yet, to date there is no core type system that captures Rust's notion of ownership and borrowing, and hence no foundation for rese…

Nichts hat mit nichts zu tun https://time.com/7323442/south-carolina-judge-diane-goodstein-house-fire-trump-political-violence/

https://mastodon.nl/@Vincent_van_Gogh
cc @…

Vincent van Gogh (@Vincent_van_Gogh@mastodon.nl)
291 Posts, 0 Following, 125 Followers · Every day a post with a painting made by Vincent van Gogh. This is a bot, and it will publish both the famous and not so well known works of van Gogh. Enjoy!

Some dude doing online reviews: I just bought it. It's working perfectly! I give it 5 stars.
Me: I have a bridge to sell you...
#naive #conned #humor

Looks interesting. The only thing that hits me hard (and yes, that might be a me problem): I know newsletters are the latest craze, but if there’s one thing I don’t want, then it’s more emails in my inbox. I can haz RSS pls? 😶 /cc @…

Graph Reconstruction with a Connected Components Oracle
Juha Harviainen, Pekka Parviainen
https://arxiv.org/abs/2509.05002 https://arxiv.org/pdf/2509.05002…

Graph Reconstruction with a Connected Components Oracle
In the Graph Reconstruction (GR) problem, the goal is to recover a hidden graph by utilizing some oracle that provides limited access to the structure of the graph. The interest is in characterizing how strong different oracles are when the complexity of an algorithm is measured in the number of performed queries. We study a novel oracle that returns the set of connected components (CC) on the subgraph induced by the queried subset of vertices. Our main contributions are as follows: 1. For a …

Get a sense of scale of the Broadview ice facility and the peaceful city of Chicago.
I made this to help people be more realistic about the scale and scope of what’s going on (and not going on) in Chicago.
cc @… @…

📣 Call for Applications
🚀 Die Sächsische Landesbibliothek - Staats- und Universitätsbibliothek Dresden lädt 12 Studierende (ab Masterniveau) und Wissenschaftler*innen der Jüdischen Studien vom 23.–26.03.2026 ein, sich im Rahmen eines Workshops mit Quellen aus den Beständen der SLUB Dresden und deren Objektbiografien zu beschäftigen mit der Aussicht auf eine Online-Ausstellung und ggf. Publikation.
➡️ Die Bewerbungsfrist endet am 01.12.2025,

Theoretical estimate and characteristics of electro-vortex flows in cylindrical electrodes
Swapnil Soni, Avishek Ranjan
https://arxiv.org/abs/2508.02297 https://

Theoretical estimate and characteristics of electro-vortex flows in cylindrical electrodes
Electro-vortex flows (EVF) arise in conducting fluids due to diverging current lines and the non-conservative Lorentz force. They are typically characterized by the $S$ parameter, defined as $S=μ_0 I^2/4π^2 ρν^2$, where it is known that $Re \sim \sqrt{S}$ for large currents. However, the strength of the EVF in a confined cylindrical domain with a co-axially placed current collector (CC) depends also on the ratio of the CC radius to the cylinder radius, $K=r_0/R$, in addition to the current …

The Filament Rift: $\Lambda$CDM's Structural Challenge Against Observation
Saeed Tavasoli, Parsa Ghafour
https://arxiv.org/abs/2508.07480 https://arxiv…

The Filament Rift: $Λ$CDM's Structural Challenge Against Observation
This study presents the first extended comparison of cosmic filaments identified in SDSS DR10 observations ($z < 0.05$) and the IllustrisTNG300-1 $Λ$CDM simulation ($z = 0$), utilizing the novel GrAviPaSt filament-finder method. The analyses are performed on both macro- and micro-filaments, each characterized by their length, thickness, and contrast in mass density. In addition to total sample comparisons, two subcategories of micro-filaments, GG (linking galaxy groups) and CC (linking galaxy …

Frozen Natural Orbitals based Equation-of-motion coupled-cluster singles, doubles and triples for Ionized, Double-Ionized, Electron Attached and Two-Electron Attached states
Manisha, Prashant Uday Manohar
https://arxiv.org/abs/2509.14157

Frozen Natural Orbitals based Equation-of-motion coupled-cluster singles, doubles and triples for Ionized, Double-Ionized, Electron Attached and Two-Electron Attached states
In this work, we present frozen natural orbital (FNO) based implementations of equation-of-motion (EOM) coupled-cluster (CC) with singles, doubles, and triples (SDT) for ionization potential (IP), double ionization potential (DIP), electron attachment (EA), and double electron attachment (DEA) variants. For EOM-CC with singles and doubles (SD), the FNO approach has already been studied by Krylov and co-workers for IP variant and for spin-flipping and spin-conserving excited states (respectively…

Replaced article(s) found for cs.CC. https://arxiv.org/list/cs.CC/new
[1/1]:
- Power of Counting by Nonuniform Families of Polynomial-Size Finite Automata
Tomoyuki Yamakami

Heute eine womöglich leichtere Übung der Geolokalisierung aus dem @… : https://mastodon.social/@schwarzPhotoBot/115020399348566519…

Weekend #Plankton Factoid 🦠🦐
You've likely watched a police procedural where the lab states the drowning was suspicious because of algae. The shells of diatoms have long been used in forensic #limnology because they are made of glass, so preserve very well.

… und hat für Trumps Inauguration Geld gespendet
From: @…
https://mastodon.social/@tazgetroete@mastodon.social/114941165682…

Time For 9 o'clock #HashTagGames hosted by @… Let's play!
#FashionAccessoryASongOrPoem

Heute vor 33 Jahren: Am 22. September 1992 kam es im #Kernkraftwerk #Kosloduj zu kleinen Bränden, ausgelöst durch einen Kurzschluss während eines Tests an Einheit 6. Notstromaggregate hielten die Sicherheitssysteme in Betrieb.

TDoA-Based Self-Supervised Channel Charting with NLoS Mitigation
Mohsen Ahadi, Omid Esrafilian, Florian Kaltenberger, Adeel Malik
https://arxiv.org/abs/2510.08001 https://

TDoA-Based Self-Supervised Channel Charting with NLoS Mitigation
Channel Charting (CC) has emerged as a promising framework for data-driven radio localization, yet existing approaches often struggle to scale globally and to handle the distortions introduced by non-line-of-sight (NLoS) conditions. In this work, we propose a novel CC method that leverages Channel Impulse Response (CIR) data enriched with practical features such as Time Difference of Arrival (TDoA) and Transmission Reception Point (TRP) locations, enabling a self-supervised localization functio…

Weekend #Plankton Factoid 🦠🦐
Many sessile marine organisms produce planktonic larvae for dispersal. This is true of the Bryozoa ("moss animals") in both freshwater and saltwater, which are often mistaken for sponges or corals. Larvae widely range in shape and lifestyle, but some larvae called cyphonautes can spend weeks feeding in the plankton. They are a distinctly flattened trian…

Heute vor 35 Jahren: Am 20. August 1990 kam es im #Kernkraftwerk #Tricastin (Block 2) zu einem Zwischenfall. Beim Beladen des Reaktors wurde eine Brennelemente-Baugruppe beschädigt. Glücklicherweise gab es keine Strahlenfreisetzung oder Personenschäden.

Heute vor 33 Jahren: Am 21. August 1992 wurde im #Kernkraftwerk #Cattenom (Block 1) ein seit 1991 vergessenes Filter im Abflusssystem entdeckt. Dieses hätte die Effizienz der Kühlung in hypothetischen Szenarien beeinträchtigen können. Einstufung: INES-Stufe 2.

Gravity drives the flow within the Stewartson layer in centrifugal convection
Rushi Lai, Jun Zhong, Chao Sun
https://arxiv.org/abs/2509.07550 https://arxiv…

Gravity drives the flow within the Stewartson layer in centrifugal convection
We conduct three-dimensional numerical simulations on centrifugal convection (CC) in a closed annular container, incorporating gravity and no-slip top and bottom boundaries, to systematically investigate rotation-induced secondary flow. The Stewartson layer, identified by an elongated circulation in mean vertical velocity plots, emerges near the inner and outer cylinders only beyond a critical gravitational forcing. Quantitative analyses confirm that the layer thickness scales as $δ_{st}\sim E…

Weekend #Plankton Factoid 🦠🦐
While crustaceans are common as #zooplankton, insects are very rare, but one group is found globally in freshwaters. Chaoborus (phantom midge or glassworm) spend the majority of their life as predaceous plankton, but are familiar to many when the adults emerge lake…

Heute vor 31 Jahren: Am 20. Oktober 1994 lief nach dem Bruch eines Ventils für zwei Stunden Schweres Wasser aus dem Reaktor #Wolseong 1 aus. Es war die gleiche Stelle, an der im Dezember 1994 das Ventil im #Kernkraftwerk

Heute vor 34 Jahren: Am 20. September 1991 wurde im #Kernkraftwerk #Bohunice eine erhöhte #Radioaktivität im Abwasser festgestellt (bis zu 1400 Bq/l). Ursache war kontaminierter Boden…

Weekend #Plankton Factoid 🦠🦐
Heliozoans are a group of amoeboid protists found commonly in both fresh and saltwater. They were termed sun-animalcules due to their spherical shape and distinctive radiating microtubules, which support axiopods used to capture food and facilitate movement. Some will also capture symbiotic algal cells which provide energy through photosynthesis. Heliozoa is &quo…

Heute vor 44 Jahren: Am 17. Oktober 1981 kam es im #Kernkraftwerk Indian Point (Indian Point Energy Center) zu einem massiven Leck, bei dem 100.000 Gallonen Hudson-Wasser unbemerkt ins Reaktorgebäude gelangten. Sicherheitsvorrichtungen versagten, zwei Pumpen waren defekt.

OneDrive in German: Ohne Drive
#computers #humor #microsoft #onedrive

Heute vor 15 Jahren: Am 17. September 2010 im #Kernkraftwerk Shin-Kori, #Südkorea, wurde bei einem Test versehentlich ein Ventil geöffnet, was 423 Tonnen boriertes Wasser freisetzte. Der Vorfall wurde als INES-Stufe 2 eingestuft.

Heute vor 33 Jahren: Am 15. Oktober wurde im litauischen #Kernkraftwerk Ignalina Block 2 wegen einer möglichen #Kühlmittellackage abgeschaltet. Am Rohrkrümmer des Reaktorkanals 32-34 zum Trommelabscheider wurde ein Riss von 3,10 mm Länge entdeckt und gegen einen neuen ersetzt.…

Heute vor 38 Jahren: Am 13. September 1987 ereignete sich der #Goiânia-Unfall in #Brasilien. Ein gestohlenes Strahlentherapiegerät führte zur schwersten radiologischen Katastrophe weltweit. Hunderte kontaminiert, vier Tote, Teile der Stadt bis heute belastet.

Heute vor 22 Jahren: Am 14.08.2003 führte ein massiver Blackout in Ontario und Teilen der USA zum vollständigen Stromausfall im #Pickering #Kernkraftwerk. Für 5,5 Stunden musste die Kühlung von fünf Reaktoren durch natürliche Zirkulation erfolgen, da das

Heute vor 32 Jahren: Am 12. Oktober 1993 wurde im #Kernkraftwerk #Barsebäck 2 ein Sicherheitsleck entdeckt: Eine beschädigte Testplatte zeigte #Korrosion, was schwerwiegende Fragen zur In…

Heute vor 68 Jahren: Am 12. Oktober 1957 sammelte sich ein 9000m³ großer radioaktiver See um den #Kernreaktor #Windscale wo es zwei Tage zuvor zu einem schweren Brand kam. Die Bevölkerung wurde erst jetzt gewarnt, Millionen Liter kontaminierte Milch heimlich ins Meer entsorgt.

Heute vor 20 Jahren: Am 4. August 2005 wurde bekannt, dass im Indian Point #Kernkraftwerk in #Buchanan, New York, von 1974 bis 2005 über ein #Leck im Abklingbecken Tritium und Strontium-90 in unteri…

Heute vor 68 Jahren: Am 9. Oktober 1957 kam es zu einem drastischen Temperaturanstieg im #Kernreaktor #Windscale (heute #Sellafield) Pile 1, der am Vortag eingeleitet wurde. Fehlende Temperatur…

Heute vor 6 Jahren: Am 8. Oktober 2019 führte ein Bedienfehler im #Kernkraftwerk #Golfech zu einem gefährlichen Ereignis. Falsche Annahmen beim Entleeren des Primärsystems führten zu einem unkontrollierten Wasserverlust. ASN forderte strengere Sicherheitsmaßnahmen.

Heute vor 68 Jahren: Am 8. Oktober 1957 wurde der #Kerneaktor Pile 1 in #Windscale (heute #Sellafield) trotz fehlender Messstellen weiter aufgeheizt was zwei Tage später unbemerkt in einen Brand…

Heute vor 34 Jahren: Am 7. August 1991 wurden im #Kernkraftwerk #Kosloduj zwei kleine metallische Fragmente mit einer Gamma-Aktivität von 1,2 bis 6 mR/h entdeckt. Diese Entdeckung kam nach der Meldung über radioaktive Hotspots am 6. August.

Heute vor 6 Jahren: Am 8. August 2019 ereignete sich der #Nuklearunfall von #Njonoksa. Eine nukleare Kettenreaktion führte zu Explosionen, mehreren Toten und Schwerverletzten sowie freigesetzter Radioaktivität. Ursache war ein fehlgeschlagener Test eines Raketenantriebs.

Heute vor 19 Jahren: Am 5. Oktober 2006 entdeckte man im #Kernkraftwerk #Doel 1 eine Fehlfunktion der Kühlgebläsemotoren. Diese sollten im Notfall die Reaktorsicherheitsbehälter kühlen. Da die Dichtheitstests fehlschlugen, wurden Doel 1 & 2 für Reparaturen abgeschaltet.

Heute vor 34 Jahren: Am 6. August 1991 wurden im bulgarischen #Kernkraftwerk #Kosloduj zwei neue radioaktive Hotspots entdeckt. Diese Entdeckung folgte einer Bodenverunreinigung durch radioaktives Wasser am 22. Juli. Die Kontamination lag bei 0,5 bis 1,5 mR/h.

Heute vor 13 Jahren: Am 5. September 2012 wurde im #Kernkraftwerk #Paks, Ungarn, festgestellt, dass eine geplante Reparatur des Schnellschlussventils nicht den Betriebsvorschriften entsprach.

Heute vor 31 Jahren: Am 3. Oktober 1994 im #Kernkraftwerk #Ringhals – Die Sicherheitsventile des Dampfgenerators funktionierten nicht korrekt. Ein Pumpenausfall führte zu Druckanstieg über 110% des erlaubten Werts. Der Reaktor ging in Standby, um die Ventile zu untersuchen.

Heute vor 8 Jahren: Am 2. August 2017 wurde bekannt, dass im #Kernkraftwerk #Belleville, FRA, und 19 weiteren Reaktoren bei Erdbeben das Risiko eines Totalverlusts des Kühlsystems besteht, aufgrund potenzieller Rohrbrüche durch unzureichende Seismik. Reparaturen wurden begonnen.

Heute vor 20 Jahren: Am 1. September 2005 kam es im #Kernkraftwerk #Atucha 1 zu einer #Überexposition eines Arbeiters während der Kalibrierung einer neu installierten Betankungsmaschine…

Heute vor 27 Jahren: Am 2. Oktober 1998 wurde beim #Forschungsreaktor #Phébus während einer Prüfung der Steuerstäbe das gesamte Schutzsystem abgeschaltet statt nur das für den getesteten Stab.

Heute vor 33 Jahren: Am 2. August 1992 kam es im #Kernkraftwerk Pickering in #Ontario, Kanada, zu einem schweren #Wasserleck. 2300 Billionen Becquerel radioaktives Tritium gelangten in den Onta…

Heute vor 34 Jahren: Am 2. Oktober 1991 im #Kernkraftwerk #Saporischschja kam es zu einer Kontamination des Sekundärwassers in Block 2. Ursache: Bedienfehler bei der Wasseraufbereitung. Aktivität lag über Grenzwert, aber ohne Strahlenfreisetzung in die Umwelt.

Heute vor 42 Jahren: Am 1. August 1983 kam es im #Kernkraftwerk Pickering in #Ontario, Kanada, zu einem #Kühlmittelverlust. Ein Druckrohr brach aufgrund von Hydrierung. Alle vier Re…

Heute vor 68 Jahren: Am 29. September 1957 ereignete sich der #Kyschtym Unfall in der #Kernanlage #Majak. Als INES-6 eingestuft, ist er der drittschwerste Atomunfall der Geschichte – nach Tschernobyl …