Norbert Marwan

Norbert Marwan

@pucicu.de

cave researcher, scientist at PIK, nonlinear data analysis, underwater rugby player https://www.pik-potsdam.de/~marwan

298 followers99 following279 posts

Norbert Marwan reposted

Arne Semsrott
@arnesemsrott.bsky.social

NEU: Monatelang erklärte die Union, das Informationsfreiheitsgesetz müsse aus Sicherheitsgründen eingeschränkt werden. Sie weigerte sich aber, Belege zu liefern. Wir verklagten also das Innenministerium, um eine Auskunft zu erzwingen. Ergebnis: Es gibt einfach keine. fragdenstaat.de/artikel/klag...

Norbert Marwan reposted

Daniel Kubiak
@danielkubiak.bsky.social

Das letzte Mal als Soldaten und Panzer in Berlin Mitte einen Protest unterbunden haben, war am 17. Juni 1953. Interessant, in welcher Tradition die JU Mitte sich sieht.

Annika Brockschmidt@ardenthistorian.bsky.social

Die Junge Union Berlin-Mitte fordert auf Insta den Einsatz der Bundeswehr (!) gegen Schülerproteste (!) (unterlegt von den Klängen der Nationalhymne), die Demonstrationen müssten „unterbunden“ werden

Norbert Marwan reposted

Markus Reuter
@markus.reuter.netzpolitik.org

Ein guter Tag: Eine junge basisdemokratische Bewegung ohne sichtbare Führer:innen - aber mit verdammt langem Atem - fegt eine rechte, korrupte und autoritäre Regierung vom Platz. Die Bevölkerung von Serbien und diese politische Bewegung haben gezeigt: Alles ist möglich.

Norbert Marwan
@pucicu.de

I'm always happy when my master students publish their work! Here an interesting combination of #recurrence_plot and #lacunarity to understand complex spatial structures (catchment topography): link.springer.com/article/10.1...

link.springer.comRecurrence lacunarity of spatial data - The European Physical Journal Special TopicsQuantifying the structure and heterogeneity of complex spatial patterns remains a key challenge in spatial data analysis. Recurrence plots (RPs) offer a powerful method for visualizing the recurrent s...

Norbert Marwan reposted

Krsto Lazarević
@krstorevic.bsky.social

Wer sich über eine mögliche linke Bürgermeisterin in Berlin empört, aber schweigt, wenn CDU-Abgeordnete in Sachsen-Anhalt mit Rechtsextremen und sogar Neonazis paktieren, signalisiert Kollaborationsbereitschaft, in der Hoffnung auch unter einer AfD-Regierung Posten und Privilegien zu behalten.

Norbert Marwan reposted

Prof. Anders Levermann, PhD
@alevermann.bsky.social

Porsches gestern verkündigte Zukunftsstrategie ist: Verstärkt auf Verbrenner zu setzen und die Produktion zu verringern und die Autos teurer zu machen. Beeindruckend... entgegen allem was die Welt braucht...

Norbert Marwan reposted

Recurrence Plots
@recurrence-plot.tk

Margaret Hamilton (known for leading the Apollo flight software team), one of the original programmers for the famous Lorenz'model has died aged 90. news.mit.edu/2026/margare...

news.mit.eduMargaret Hamilton, computing pioneer who led software development for the Apollo program, dies at 90Margaret H. Hamilton, a profoundly influential computer scientist best known for leading the software engineering team at MIT’s Instrumentation Lab during NASA’s Apollo program, died at age 90.

Norbert Marwan reposted

Nobel Prize
@nobelprize.org

BREAKING NEWS The 2026 Nobel Prize in Physiology or Medicine has been awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel “for their discoveries concerning light-gated ion channels and optogenetics.”

Norbert Marwan reposted

Recurrence Plots
@recurrence-plot.tk

Chemically assisted wet-dry cycling drives limestone strength degradation in reservoir drawdown zones – found using acoustic emission and #recurrence_quantification_analysis to show Na2SO4/NaCl accelerate damage while NaOH suppresses it via enhanced Ca2+ adsorption. link.springer.com/article/10.1...

link.springer.comDamage Evolution of Limestone Under Chemically Assisted Wet–Dry Cycles: An Integrated Analysis Using Recurrence Quantification, Machine Learning and Chemical Modeling - Rock Mechanics and Rock Enginee...Periodic reservoir drawdown causes repeated wet–dry cycles in the drawdown zone, leading to pronounced changes in rock mechanical properties and potential instability. Because the Yangtze River water ...

Norbert Marwan reposted

Seb Breitenbach
@speleoseb.bsky.social

I don’t have to tell you to vote #calcite! only viable option with it’s relevance for palaeontology, paleoclimatology, oceanography, geothermometry, carbon cycling, biogeochemistry… I could go on, but I guess you get the idea 🤩 A beautiful example from Sägistal 🇨🇭 @pucicu.de @scitobias.bsky.social

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Round 1 Match 11 It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

mineralcup.orgVote in Round 1 Match 11 — Mineral Cup & Ore CupVote in Calcite vs Julienite Credit: Harold Moritz and David Hospital

Norbert Marwan reposted

Dr. Nina Davtian (she/her/hers)
@ninadavtian.bsky.social

Replying to @ninadavtian.bsky.social

Here is the 🔗 to the paper itself. 👇🏻 🧪 ⚒️ 🌊 🦣 #PaleoSky bsky.app/profile/ianh...

Prof Ian Hall@ianhall.bsky.social

...But the implications for understanding our climate system are fascinating. The paper: Planetary energy budget during abrupt glacial climate events set by Atlantic Ocean heat valve www.nature.com/articles/s41... 3/3

nature.comPlanetary energy budget during abrupt glacial climate events set by Atlantic Ocean heat valve - Nature GeoscienceVariations in Atlantic Meridional Overturning Circulation strength through abrupt Dansgaard–Oeschger events during Pleistocene glacial periods controlled ocean heat content, and heat uptake by the pla...
Norbert Marwan
@pucicu.de

We organised a special session on #recurrence_plot analysis at the EUSIPCO 2026 – to bring this method to the signal processing people … Thanks to all speakers and to Martijn for the organisation! eusipco2026.org

Norbert Marwan reposted

Prof. Stefan Rahmstorf
@rahmstorf.bsky.social

Why are climate scientists not surprised about mountains being destabilized by glacier melt and permafrost thaw? Because they have long predicted that as a result of #globalheating. www.theguardian.com/world/2026/a...

theguardian.comClimate crisis could be destabilising mountain areas like Nepal, experts warnUnusual heat this year may have melted ice and thawed bonds that hold glaciers in place – leading to catastrophe
Norbert Marwan
@pucicu.de

my first paper for 2027 …

Norbert Marwan@pucicu.de

New Physics Reports paper out: "Reconstruction of interpretable causal network dynamics from time series data" including #recurrence_plot methods. 😃 free read: authors.elsevier.com/c/1ngh71KAVt... www.sciencedirect.com/science/arti...

sciencedirect.comReconstruction of interpretable causal network dynamics from time series dataReconstructing causal dynamic networks from multivariate time series is a foundational problem in complex systems science. Yet, the key scientific iss…

Norbert Marwan reposted

Melaine Le Roy
@subfossilguy.bsky.social

Taillon Glacier (Gavarnie, Pyrenees) 05.09.2015 | 18.08.2026 We get the glaciers we deserve! What have we done for glaciers during the last decade? Nothing. As a result they are disappearing because of us 🧊🔥 📷 @PirineosMeteo

Norbert Marwan reposted

Norbert Marwan
@pucicu.de

Our collaborators from Cameroon published a study on monitoring engineered structures: "Detection of crack on Euler–Bernoulli beam using recurrence quantification analysis" link.springer.com/article/10.1...

link.springer.comDetection of crack on Euler–Bernoulli beam using recurrence quantification analysis - The European Physical Journal Special TopicsThe current work presents a thorough nonlinear framework, for initial crack detection and characterization in an Euler–Bernoulli beam, with breathing cracks, using a hybrid of the Mathieu–Duffing form...
Norbert Marwan
@pucicu.de

New Physics Reports paper out: "Reconstruction of interpretable causal network dynamics from time series data" including #recurrence_plot methods. 😃 free read: authors.elsevier.com/c/1ngh71KAVt... www.sciencedirect.com/science/arti...

sciencedirect.comReconstruction of interpretable causal network dynamics from time series dataReconstructing causal dynamic networks from multivariate time series is a foundational problem in complex systems science. Yet, the key scientific iss…

Norbert Marwan reposted

Wolf Maahn
@wolfmaahn.de

Der vergangene Sommer war der CDU Landesregierung in Hessen noch nicht Katastrophe genug🔥

Emma@emha.bsky.social

'Der Klimabeirat soll nicht mehr wissenschaftlich besetzt sein.' Wozu auch im fossilen Schwurblerland? 🙄 www.fr.de/rhein-main/l...

fr.deReform des Klimagesetzes: Hessen weicht den Klimaschutz aufDie schwarz-rote Landesregierung will die Klimaziele unverbindlicher gestalten. Die Bilanz für das vergangene Jahr fällt gleich ganz weg.

Norbert Marwan reposted

Recurrence Plots
@recurrence-plot.tk

"A synergetic perspective of analysing phase space dynamics: the crucial role of recurrence" – links Haken's synergetics with #recurrence_plot analysis, revealing order-chaos transitions in phase-space dynamics and ties to machine learning for predictive modelling. link.springer.com/article/10.1...

link.springer.comA synergetic perspective of analysing phase space dynamics: the crucial role of recurrence - The European Physical Journal Special TopicsHermann Haken’s synergetics provides a fundamental theoretical framework for understanding the emergence of macroscopic order from microscopic interactions in complex dynamical systems. In this paper,...

Norbert Marwan reposted

Der Volksverpetzer
@volksverpetzer.de

Replying to @volksverpetzer.de

Enteignungen passieren übrigens JÄHRLICH MEHRMALS, fast monatlich. Die MEISTEN DURCH CDU-BETEILIGUNG. Und der Großteil für den Bau von Autobahnen. Enteignungen sind laut Grundgesetz ausdrücklich erlaubt. (Artikel 14 und 15) enteignungspartei.lol

enteignungspartei.lolCDU - Die EnteignungsparteiIn Berlin kämpft die CDU mit allen Mitteln gegen Enteignungen zu Gunsten von Mieter*innen – dabei enteignet bundesweit keine Regierungspartei soviel wie die Union.

Norbert Marwan reposted

Patrick Breitenbach
@patrickbreitenbach.de

Das traurige ist, dass der Landwirtschaft mit einer anderen Politik vorab hätte geholfen werden können. Nun wird es die jährliche Schadensverwaltung, die in Summe teuerer & wirkungsloser sein wird als der abgewehrte Klimaschutz. Klimakollaps heißt Wohlstandskollaps. Wollte aber niemand wissen! 🙈🙉🙊

tagesschau.deErnteeinbußen erwartet: Landwirtschaftsminister will Bauern helfenWegen der langen Trockenheit erwarten die Landwirte geringere Ernten. Landwirtschaftsminister Rainer hat den Bauern deshalb Hilfe zugesichert - wenn verlässliche Zahlen vorliegen. Lebensmittel würden ...
Norbert Marwan
@pucicu.de

Our collaborators from Cameroon published a study on monitoring engineered structures: "Detection of crack on Euler–Bernoulli beam using recurrence quantification analysis" link.springer.com/article/10.1...

link.springer.comDetection of crack on Euler–Bernoulli beam using recurrence quantification analysis - The European Physical Journal Special TopicsThe current work presents a thorough nonlinear framework, for initial crack detection and characterization in an Euler–Bernoulli beam, with breathing cracks, using a hybrid of the Mathieu–Duffing form...