Norbert Marwan

@pucicu
80 Followers
44 Following
622 Posts

['pu:ʨ⁠i ʨ⁠u]

"The most dangerous worldview is the view of those who have never looked at the world." A. v. Humboldt

cave researcher, scientist at PIK, nonlinear data analysis, underwater rugby player

⚠️ Some posts flutter over as cross-posts from Bluesky.

Webhttps://tocsy.pik-potsdam.de/~marwan/

Next CTCS webinar next Monday, Nov 24, 2025, 8:30 PM to 10:00 PM IST, 4:00 PM to 05:30 PM CET

Prof. Balakumar Balachandran from the University of Maryland, will talk about "Can noise be used to realize the desired dynamics?"
https://us06web.zoom.us/webinar/register/WN_wZOx7qk_SKy9WN2L9_7j7w
https://ctcs.iitm.ac.in/ctcs-webinar

Our partner from Federal University of Paraná (Curitiba) developed a fast #Julia package for microstate analysis of #recurrence_plot
https://doi.org/10.1063/5.0293708
RecurrenceMicrostatesAnalysis.jl: A Julia library for analyzing dynamical systems with recurrence microstates

Recurrence Quantification Analysis (RQA) has become a standard tool for extracting nonlinear characteristics from time series. It relies on specific recurrence

AIP Publishing
Our partner from Federal University of Paraná (Curitiba) developed a fast #Julia package for microstate analysis of #recurrence_plot
https://doi.org/10.1063/5.0293708
RecurrenceMicrostatesAnalysis.jl: A Julia library for analyzing dynamical systems with recurrence microstates

Recurrence Quantification Analysis (RQA) has become a standard tool for extracting nonlinear characteristics from time series. It relies on specific recurrence

AIP Publishing

The 3rd International Symposium on #Quantum #Computing and #Musical #Creativity (ISQCMC ’25) was a great experience!

Participants came from Austria, Belgium, Brazil, California, Canada, China, Cyprus, France, Germany, Greece, Japan, Italy, North Carolina, Poland, Portugal, Spain, Sweden, Switzerland, Washington, and the United Kingdom.

We had the amazing places of the Botanical Garden (1789) and Palazzo Steri (1320 ca.) in #Palermo.

I had the honor of being the main chair, and I am grateful to my wonderful colleagues for their invaluable collaboration: Dr. Omar Costa Hamido (OCH) and Paulo Itaboraí of the organizational team, Prof. Lucia Rizzuto my co-chair, Prof Marco Elio Tabacchi, Prof. Eduardo Miranda, and all the advisory committee. And thanks to Prof Gruttadauria and Dr Speciale for granting us the amazing venue of the Garden! Thanks to our keynote speaker Prof Rocchesso!

Thank you to the flourishing community of #quantum #music!

https://2025.isqcmc.org/

Joint #recurrence_plot used to investigate connectivity within human brain's connectome: https://link.springer.com/article/10.1007/s10916-025-02244-6
K-operator for Modelling Neurodegeneration: Simulations, fMRI Application, Eigenvalue Analysis and Recurrence Plots - Journal of Medical Systems

The brain network damage provoked by a neurological disease can be modelled as the result of the action of an operator, K, acting on the brain, inspired by physics. Here, we explore the matrix formulation of K, analysing eigenvalues and eigenvectors, with heuristic considerations on different techniques to approximate it. The primary objective of this paper is to lay the foundational groundwork for an innovative framework aimed at the development of predictive models regarding the progression of neurodegenerative diseases. This endeavour will leverage the potential of integrating these novel representations of brain damage with advanced machine-learning techniques. A case study based on real-world data is presented here to support the proposed modelling.

SpringerLink
Es muss einen TÜV für verfassungsfeindliche Parteien geben! Deutschland prüft alles: Geräte, Autos, Absolvent:innen. Wieso prüfen wir Staatsfeinde nicht? Der wichtigste Vorschlag seit langem: Nicht von Verbot sprechen, sondern davon, demokratiefeindliche Parteien zu überprüfen!
Another study using the novel K-operator concept by @mariamannone just published in the Journal of Medical Systems https://link.springer.com/article/10.1007/s10916-025-02244-6
K-operator for Modelling Neurodegeneration: Simulations, fMRI Application, Eigenvalue Analysis and Recurrence Plots - Journal of Medical Systems

The brain network damage provoked by a neurological disease can be modelled as the result of the action of an operator, K, acting on the brain, inspired by physics. Here, we explore the matrix formulation of K, analysing eigenvalues and eigenvectors, with heuristic considerations on different techniques to approximate it. The primary objective of this paper is to lay the foundational groundwork for an innovative framework aimed at the development of predictive models regarding the progression of neurodegenerative diseases. This endeavour will leverage the potential of integrating these novel representations of brain damage with advanced machine-learning techniques. A case study based on real-world data is presented here to support the proposed modelling.

SpringerLink
Next result from our fruitful collaboration with UFPR in Curitiba: Effect of sampling size in recurrence microstates analysis
https://authors.elsevier.com/c/1l~sR1M2-2P~T6
Nein, wir sind nicht auf Instagram, TikTok & Co

Faschismus wird lauter, Demokratie kränkelt. Giergetriebene soziale Medien befeuern diese Trends. Wir sind ausgestiegen – und bauen im Fediverse

Digitalcourage

Digitalen Nachlass praktisch regeln: Passwort-Manager, Vorsorgevollmacht und Notfallzugriff – mit diesen drei Bausteinen bleiben Angehörige handlungsfähig. 🪦 👇

https://www.kuketz-blog.de/digitaler-nachlass-grundlagen-praxistaugliche-umsetzung/

#nachlass #testament #password #passwort #passwordmanager #passwortmanager #keepass #protonpass #bitwarden #vorsorge #vorsorgevollmacht #bankvollmacht #datenschutz #dsgvo #notfallzugriff

Digitaler Nachlass: Grundlagen & praxistaugliche Umsetzung

Digitalen Nachlass praktisch regeln: Passwort-Manager, Vorsorgevollmacht und Notfallzugriff – mit diesen drei Bausteinen bleiben Angehörige handlungsfähig.