# gst: rare transitions in noisy net scenarios

AA << study small white noise perturbations of planar dynamical systems with heteroclinic networks in the limit of vanishing noise. (They)  show that the probabilities of transitions between various cells that the network tessellates the plane into decay as powers of the noise magnitude. (They) show that the most likely scenario for the realization of these rare transition events involves spending atypically long times in the neighborhoods of certain saddle points of the network. >>️

Yuri Bakhtin, Hong-Bin Chen, Zsolt Pajor-Gyulai. Rare transitions in noisy heteroclinic networks. arXiv: 2205.00326v1 [math.PR]. Apr 30, 2022.    https://arxiv.org/abs/2205.00326

Also

keyword 'noise'  in FonT 

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

keyword 'rumore'  in Notes

(quasi-stochastic poetry)

https://inkpi.blogspot.com/search?q=rumore

Keywords: gst, transitions, networks, heteroclinic networks, noise

# gst: how a synchronization could emerge from chaotic activities

<< Can we find order in chaos? Physicists have shown, for the first time that chaotic systems can synchronize due to stable structures that emerge from chaotic activity. These structures are known as fractals, shapes with patterns which repeat over and over again in different scales of the shape. As chaotic systems are being coupled, the fractal structures of the different systems will start to assimilate with each other, taking the same form, causing the systems to synchronize. >>️

<< If the systems are strongly coupled, the fractal structures of the two systems will eventually become identical, causing complete synchronization between the systems. These findings help us understand how synchronization and self-organization can emerge from systems that didn't have these properties to begin with, like chaotic systems and biological systems. >>️

Topological synchronization of chaotic systems. Bar-Ilan University. Apr 22, 2022. 

https://phys.org/news/2022-04-topological-synchronization-chaotic.html

<< chaotic synchronization has a specific trait in various systems, from continuous systems and discrete maps to high dimensional systems: synchronization initiates from the sparse areas of the attractor, and it creates what (AA) termed as the ‘zipper effect’, a distinctive pattern in the multifractal structure of the system that reveals the microscopic buildup of the synchronization process. >>️

Lahav, N., Sendina-Nadal, I., et al. Topological synchronization of chaotic systems. Sci Rep 12, 2508. doi: 10.1038/ s41598-022-06262-z. Feb 15, 2022. 

https://www.nature.com/articles/s41598-022-06262-z

Also

keyword 'self-assembly' in FonT

https://flashontrack.blogspot.com/search?q=self-assembly

Keywords: gst, self-assembly, self-organization, fractals, topological synchronization, zipper effect, chaos, chaotic systems

# gst: like steering a marble through a tilting labyrinth, randomness seems to quickly deliver specific outcomes.

<< According to the infinite monkey theorem, a monkey randomly hitting the keys of a typewriter will eventually write something worth reading—but it might take a few trillion years of trying. For those lacking the patience to wait, (AA)  now show that randomness can deliver specific outcomes much more quickly.  Simulating a 2D nanocluster of a dozen particles, (they) determine the temperature at which thermal fluctuations can most quickly rearrange those particles into a predetermined shape. They find that this time can be dramatically cut by applying an appropriate macroscopic force to the particles. >>

<< The duo also simulated nanoclusters that were subject to a macroscopic force field, for example, metallic nanoparticles in an electric field. Like steering a marble through a tilting labyrinth, they found the optimal global force to apply at each iteration such that the nanocluster navigated the space of possible configurations several orders of magnitude more quickly. >>️️

Marric Stephens. Rearranging Nanoclusters Using Randomness. Physics 15, s83. Jun 22, 2022. 

https://physics.aps.org/articles/v15/s83

Francesco Boccardo, Olivier Pierre-Louis. Controlling the Shape of Small Clusters with and without Macroscopic Fields. Phys. Rev. Lett. 128, 256102. Jun 22, 2022.  

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.256102

Also

keyword 'random' in FonT:

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

keyword 'error' | 'fuzzy' | 'noise'  in FonT 

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

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

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

keywords 'errore' | 'errori' in Notes (quasi-stochastic poetry)

https://inkpi.blogspot.com/search?q=errore

https://inkpi.blogspot.com/search?q=errori

keywords 'jelly roll' in FonT

https://flashontrack.blogspot.com/search?q=jelly+roll

Keywords: gst, nano, nanocluster, fluctuations, randomness, noise

# gst: a rocking shadow dance: the broken disk.

AA << reveal a new phenomenon dubbed the "rocking shadow" effect that describes how disks in forming planetary systems are oriented, and how they move around their host star. The effect also gives clues as to how they might evolve with time. >>

<< Protoplanetary disks are often thought to be shaped like dinner plates—thin, round and flat. However, recent telescope images from the Atacama Large Millimeter/Submillimeter Array (ALMA) show that this is not always the case. Some of the disks seen by ALMA have shadows on them, where the part of the disk closest to the star blocks some of the stellar light and casts a shadow onto the outer part of the disk. From this shadow pattern, it can be inferred that the inner part of the disk is oriented completely differently to the outer part, in what is called a broken disk. >>️️

<< As the inner disk moved through the gravitational pull of the central star, the shadow it cast moved across the outer disk. But instead of the shadow pattern moving around the disk like a clock-hand as expected, it rocked back and forth with a see-saw-like motion. So although the inside disk kept turning in the same direction, its shadow looked like it was rocking forwards and backwards. >>

️

Examining rocking shadows in protoplanetary disks. Royal Astronomical Society. Jul 15, 2022.

https://phys.org/news/2022-07-shadows-protoplanetary-disks.html

Rocking shadows in broken 

circumbinary discs. 

https://youtu.be/-0kAqc-sObY

The National Astronomy Meeting (NAM) 2022. The University of Warwick, 11th. Jul 15, 2022.

https://nam2022.org/

keywords: gst, astro, shadow, rocking shadow, broken disc

# life: Art Tatum in "Tea for Two", ipotesi di rivisitazione.

Piero Sansonetti. E se Letta e Meloni decidessero di correre da soli? Il Riformista, 4, 147. 27 Luglio 2022.

https://www.ilriformista.it

Art Tatum. Tea for Two. 

https://youtu.be/kACt0FM0Kf8

Nel transitorio 1994 gli Italiani hanno avuto a disposizione sostanzialmente tre opzioni: Mr Quack, Segni-Martinazzoli, Silvio B. plus (Silvio silvo- sadico- sadico, preludio di Donald Potus). Hanno scelto e sono stati risucchiati in un buco nero. Oggi, 28 anni dopo, residenti nello stesso buco nero, il 46% ca degli Italiani che hanno dichiarato di partecipare alle prossime elezioni ( ipotetico 50-60% di chi voterà ) si orienterebbe all'interno di due tra le numericamente significative opzioni disponibili.  

( https://www.politico.eu/europe-poll-of-polls/italy/ )

In effetti, nella finestra temporale di 28 anni, le opzioni di interesse (per il 46% di votanti, pari a forse qualcosa di più di un quarto degli aventi diritto al voto, vale a dire 23-25% ca) sembra si siano ridotte da tre a due: Tea for Two. 

Anche

'Tea for two' in: Elettrico Charlie (Seven come eleven). Notes. Feb 01, 2007. 

https://inkpi.blogspot.com/2007/02/2116-elettrico-charlie-seven-come.html

# zoo: apropos of extreme dwarf entities, three new species of nano-hawk moths (Cautethia Grote, Sphingidae)

<< Hawk moths are known for being some of the largest night fliers in the insect world (..) three new species from The Bahamas are breaking records at the opposite end of the size spectrum. At about the length of a vitamin pill, they are among the smallest discovered. >>️

<< Hawk moths are a diverse group of insects, with some 1,700 species worldwide. In addition to their remarkable wingspans, they also have incredibly long proboscises, the straw-like tongues they use to siphon nectar.  The title for the world's longest proboscis is held by a hawk moth endemic to Madagascar, which comes in at just under 12 inches when fully unfurled. >>️

Brian V. Smith. New hawk moth species are among the smallest ever discovered. Florida Museum of Natural History. Jul 11, 2022. 

https://phys.org/news/2022-07-hawk-moth-species-smallest.html

Jacqueline Y. Miller, Deborah L. Matthews, Riley J. Gott. Three new species of Cautethia Grote (Lepidoptera: Sphingidae) from the Lucayan Archipelago and keys to West Indies species. Insecta Mundi. 0937,  1-28. Jun 24, 2022 (pdf).

https://centerforsystematicentomology.org/insectamundi/0937_Miller_etal_2022.pdf

Also

Apropos of extreme dwarf entities, the nano-chameleon (Brookesia nana). FonT.  Feb 9, 2021.

https://flashontrack.blogspot.com/2021/02/zoo-apropos-of-extreme-dwarf-entities.html

keyword 'nano' in FonT

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

keyword 'nano' in Notes 

(quasi-stochastic poetry)

https://inkpi.blogspot.com/search?q=nano

keywords: life, zoo, evol, dwarf, nano

# life: a proposito di vaticini ...

a proposito di vaticini (dal lat.  vates «vate» e canĕre «cantare» )...

Mr. Mario Draghi, la simmetria rifiutata ... 

Simmetrico, purtuttavia caotico. FonT. 19 luglio 2019.

https://flashontrack.blogspot.com/2019/07/life-simmetrico-purtuttavia-caotico.html

Anche

Be careful ... by Potus Joe. FonT. 11 maggio 2022. 

https://flashontrack.blogspot.com/2022/05/life-be-careful-by-potus-joe.html

Anche

Eight new echoing black hole binaries (in Milky Way). FonT. 25 giugno 2022. 

https://flashontrack.blogspot.com/2022/06/astro-eight-new-echoing-black-hole.html

Anche

non saprei dire il perchè ma le vicende governative di Mr Mario Draghi mi hanno fatto ricordare le 'bizzarre visioni' degli Artisti Aldo, Giovanni e Giacomo nell'episodio 'Il Conte Dracula' ... 

(1)   

https://youtu.be/gZNBR4YTSLs

(2)   

https://youtu.be/m9uRj9fV-i4

Keywords: symmetry, chaos, black hole, Mario Draghi, Gov