flashontrack

<< Parrondo's paradox indicates a paradoxical situation in which a winning expectation may occur in sequences of losing games. There are many versions of the original Parrondo's games in the literature, but the games are played by two players in all of them. (AA) introduce a new extended version of games played by three players and a three-sided biased dice instead of two players and a biased coin in this work. >>️

<< Figure 11 shows the result of combination switches A and B for the fair probabilities in set S_5. The simulation results are performed so on until 100 steps were done, and each step is averaged over 10000 repeats. This strategy, different from the others and even the original Parrondo's paradox, produces a fair expectation from two noisy switches in which the combination of two fair switches is fair. >>

️

Atiyeh Fotoohinasab. A new generalization of Parrondo's games to three players and its application in genetic switches. arXiv: 2101.11401v2 [q-bio.PE]. Feb 2, 2021.

https://arxiv.org/abs/2101.11401

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keyword 'parrondo' in FonT

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keyword 'parrondo' in Notes (quasi-stochastic poetry)

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keyword 'three-body' in FonT

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Keywords: gst, games, parrondo, three-body

sabato 4 giugno 2022

# pnei: brain motor and fear circuits regulate leukocytes during acute stress

<< The nervous and immune systems are intricately linked. Although psychological stress is known to modulate immune function, mechanistic pathways linking stress networks in the brain to peripheral leukocytes remain poorly understood. Here, (AA) show that distinct brain regions shape leukocyte distribution and function throughout the body during acute stress in mice. >>️

Poller, W.C., Downey, J., et al. Brain motor and fear circuits regulate leukocytes during acute stress. Nature. doi: 10.1038/ s41586-022-04890-z. May 30, 2022.

https://www.nature.com/articles/s41586-022-04890-z

PNEI: Psycho-Neuro-Endocrine-Immunology

https://pubmed.ncbi.nlm.nih.gov/?term=pnei

Also

Inchingolo G. Percezione dello stato di salute e leucociti in anziani ultraottantenni. Atti 36 Congresso Nazionale Società Italiana di Gerontologia e Geriatria, Palermo, 7-10 Novembre 1991. Giornale di Gerontologia 1991; XXXIX(11): 753.

https://sites.google.com/site/inkgmr2/papers

keyword 'pnei' | in FonT

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keyword 'pnei' | in Notes

(quasi-stochastic poetry)

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

Keywords: pnei, neuroimmunology, leukocytes, fear, stress, virus, viral infection, adaptation, adaptive immunity

lunedì 30 maggio 2022

# gst: intentional defects to trap confined acoustic modes that are protected from perturbation

AA << has discovered how to exploit certain defects to protect confined energy in acoustics systems. Their experimental approach provides a versatile platform to create at-will defects for further theoretical validation and to improve control of waves in other systems, such as light >>

<< We set to understand whether topological defects, such as disclinations, can be created to trap highly confined acoustic modes that are protected from perturbation, (..) Our core insight was that, if we consider the point group symmetry of the disclination, a pair of disclinations modes are prevented from pairing away from zero frequency. This protection mechanism results from the interplay of the symmetry-protected topological phase of the crystalline lattice and the topological charge and symmetry of the disclination. >> Wladimir A. Benalcazar.

<< This is the first work experimentally validating that such protected states exist in the disclination core, >> Yun Jing.

️

Ashley J. Wennersherron. Researchers find imperfections provide protection for system symmetry. Penn State College of Engineering. May 20, 2022.

https://phys.org/news/2022-05-imperfections-symmetry.html

Sarah Wells. Symmetrical Binding for Topological States. Physics 15, s56. Apr 26, 2022.

https://physics.aps.org/articles/v15/s56

Yuanchen Deng, Wladimir A. Benalcazar, et al. Observation of Degenerate Zero-Energy Topological States at Disclinations in an Acoustic Lattice. Phys. Rev. Lett. 128, 174301. Apr 26, 2022.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.174301

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keyword 'acoustic' in FonT

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Keywords: gst, acoustics, acoustic metamaterials, symmetry, system symmetry, imperfection, defect, topological defects, disclination

sabato 28 maggio 2022

# gst: surface geometry for pattern dynamics, how a static model on a flat surface can propagate over a curved one

<< Pattern dynamics on curved surfaces are found everywhere in nature. The geometry of surfaces have been shown to influence dynamics and play a functional role, yet a comprehensive understanding is still elusive. >>

AA << report for the first time that a static Turing pattern on a flat surface can propagate on a curved surface, as opposed to previous studies, where the pattern is presupposed to be static irrespective of the surface geometry. To understand such significant changes on curved surfaces, (AA) investigate reaction-diffusion systems on axisymmetric curved surfaces. (..) both the symmetries of the surface and pattern participate in the initiation of pattern propagation. >>️

Ryosuke Nishide, Shuji Ishihara. Pattern Propagation Driven by Surface Curvature. arXiv:2205.08064v1 [nlin.PS]. May 17, 2022.

https://arxiv.org/abs/2205.08064

Keywords: gst, pattern formation, curved surface, transition, geometry

sabato 21 maggio 2022

# gst: apropos of transitions, two aspects of intermittency

<< intermittency produces significant probability of rare events that may locally accelerate the collision rates by a large factor in comparison with estimates using typical events. >>

<< Increasing intermittency of turbulence destroys the theory not via stronger bursts, but rather via increase of characteristic sizes of regions of calm and quiescent flow. ([AA️] remind that these two aspects of intermittency go together: increase of regions of calm flow and at the same time increased probability of strong bursts ([8] U. Frisch, Turbulence: The Legacy of A. N. Kolmogorov, (Cambridge University Press, New York, 1995).). >>

Itzhak Fouxon, Seulgi Lee, Changhoon Lee. Intermittency and collisions of fast sedimenting droplets in turbulence. arXiv:2205.06972v1 [physics.flu-dyn]. May 14, 2022.

https://arxiv.org/abs/2205.06972

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keyword 'intermittency' in FonT

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keyword 'intermittenza|e' | 'intermittente|i' in Notes (quasi-stochastic poetry)

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

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

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

Keywords: gst, intermittency, collision, drop, droplet, turbulence

mercoledì 18 maggio 2022

# brain: jazzy perceptions inside, there’s more to all the noise; even in the dark, neurons of the visual cortex chat

<< Scientists are now rethinking how they study and conceive of perception. >>

<< At every moment, neurons whisper, shout, sputter and sing, filling the brain with a dizzying cacophony of voices. Yet many of those voices don’t seem to be saying anything meaningful at all. They register as habitual echoes of noise, not signal; as static, not discourse. >>️

<< But over the past decade, that view has changed. (..) There’s more to all the noise, scientists realized, than they had assumed. >>️

<< Now, by analyzing both the neural activity and the behavior of mice in unprecedented detail, researchers have revealed a surprising explanation for much of that variability: Throughout the brain, even in low-level sensory areas like the visual cortex, neurons encode information about far more than their immediately relevant task. They also babble about whatever other behaviors the animal happens to be engaging in, even trivial ones — the twitch of a whisker, the flick of a hind leg. Those simple gestures aren’t just present in the neural activity. They dominate it. >>️

<< Our brains aren’t just thinking in our heads. Our brains are interacting with our bodies and the way that we move through the world. >> Cris Niell.

<< Wait — maybe the brain isn’t noisy. Maybe it’s actually much more precise than we thought, >> David McCormick️.️

Jordana Cepelewicz. ‘Noise’ in the Brain Encodes Surprisingly Important Signals. Quantamag. Nov 7, 2019.

https://www.quantamagazine.org/noise-in-the-brains-vision-areas-encodes-body-movements-20191107/

Salkoff DB, Zagha E, McCarthy E, McCormick DA. Movement and Performance Explain Widespread Cortical Activity in a Visual Detection Task. Cereb Cortex. 2020 Jan 10;30(1):421-437. doi: 10.1093/ cercor/bhz206.

https://pubmed.ncbi.nlm.nih.gov/31711133/

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keyword 'perception' in FonT

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keyword 'percezione' | 'percezioni' in Notes (quasi-stochastic poetry)

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

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