# gst: noise as endogenous control

<< Systems biology faces the monumental task of synthesizing vast amounts of molecular facts into a cohesive whole. While it is recognized that stochasticity is ubiquitous in the cell, with noise playing a role in gene expression, differentiation, and switching (..), it is still commonly argued that the cell functions in spite of the noisy cellular environment. >>️

<< Stochastic systems have a control-theoretic interpretation in which noise plays the role of endogenous control. In the weak-noise limit, relevant at low temperatures or in large populations, control is optimal and an exact mathematical mapping from noise to control is described, where the maximizing the probability of a state becomes the control objective. >>

<< In Langevin dynamics noise is identified directly with control, while in general Markov jump processes, which include chemical reaction networks and electronic circuits, (AA) use the Doi-Zel'dovich-Grassberger-Goldenfeld-Peliti path integral to identify the `response' or `tilt' field π as control, which is proportional to the noise in the semiclassical limit. This solves the longstanding problem of interpreting π. >>

AA << illustrate the mapping on multistable chemical reaction networks and systems with unstable fixed points. The noise-control mapping builds intuition for otherwise puzzling phenomena of stochastic systems: why the probability is generically a non-smooth function of state out of thermal equilibrium; why biological mechanisms can work better in the presence of noise; and how agentic behavior emerges naturally without recourse to mysticism. >>

Eric De Giuli. Noise equals endogenous control. arXiv: 2503.15670v2 [q-bio.MN]. Mar 24, 2025.

https://arxiv.org/abs/2503.15670

Also: noise, disorder & fluctuations, transition, dance, jazz, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, noise, disorder, transition, ethno, crosstalk, gossip, misinformation, fake news, dance, jazz

# life: apropos of fake news, creation of misinformation, and how misinformation can spread via person-to-person communication.

<< Numerical facts play a prominent role in public discourse, but individuals often provide incorrect estimates of policy-relevant numerical quantities >>

Jason C Coronel, Shannon Poulsen, Matthew D Sweitzer.  Investigating the generation and spread of numerical misinformation: A combined eye movement monitoring and social transmission approach. Human Communication Research, hqz012, doi: 10.1093/hcr/hqz012. Dec 5, 2019

https://academic.oup.com/hcr/advance-article-abstract/doi/10.1093/hcr/hqz012/5652186

<< If you're looking for who's responsible for all the misinformation out there, you might want to take a peek in the mirror. >>

Jennifer Smola. Facts are misremembered to fit personal biases, study finds.  The Columbus Dispatch (Columbus, Ohio). Dec 26, 2019.

https://phys.org/news/2019-12-facts-misremembered-personal-biases.html

Also

fake news, by slow or/and fast catalysis, everyday, everywhere, in all ages. Feb 20, 2017.  

https://flashontrack.blogspot.com/2017/02/n-soc-fake-news-by-slow-orand-fast.html

<< qui non e' impossibile immaginare una entita' di intelligenza artificiale (AI) che, in modalita' autonoma, intenda utilizzare "le immagini" di uno scenario in transizione di questo tipo come modello base di prima approx per l'analisi del comportamento e le previsioni all'interno di un sistema costituito da entita' altre ... ad es. all'interno di un  contesto culturale umano; >>

Anomalous formation of molecules after vapor deposition.  Dec 31, 2015.

https://flashontrack.blogspot.com/2015/12/rmx-s-gst-anomalous-formation-of.html

<< Il ruolo sociale del pettegolezzo e' immenso. [..] Il pettegolezzo e' una inquisizione continua e reciproca, uno spionaggio e una sorveglianza di tutti da parte di tutti, a tutte le ore del giorno e della notte. >>

Tarde, Gabriel. Ecrits de psychologie sociale. Cit. Prigogine, Ilya. La Nuova Alleanza. Milano: Longanesi & C., 1979,  pp.147-149. Trad. Morchio, Renzo.

keyword "fake" in FonT

https://flashontrack.blogspot.com/search?q=fake