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mercoledì 3 aprile 2024
# gst: elastomers fail from the edge.
martedì 26 settembre 2023
# gst: apropos of transitions, three distinct new families of long-wave instabilities and potential new pathways to turbulence.
giovedì 2 marzo 2023
# gst: when science meets poetry, an image of three-dimensional stepped cracks (bistability, and their transition to simple cracks)
venerdì 24 febbraio 2023
# gst: apropos of transitions, erratic, bursty growth processes in cellular sprawl
martedì 21 febbraio 2023
# gst: towards (insights into) intermittency and inhomogeneity of turbulent mixing
giovedì 22 dicembre 2022
# gst: breakthrough in unstable growth processes, shorter branches can revive when a striking transition of the leading branch reaches the boundary of the system.
martedì 20 dicembre 2022
# gst: slow dynamics of a interacting mobile impurity (in a bath of localized particles)
mercoledì 20 aprile 2022
# life: apropos of transitions, a leap from chemistry to biology, the hypothesis of self-assembling droplets, the 'droplet world'.
venerdì 17 settembre 2021
# gst: apropos of transitions: effects of random waves interacting with a coherent structure
lunedì 17 maggio 2021
# gst: modeling complex nanofibril-based (cell) walls to meet diverse (bio-physical) constraints.
giovedì 8 ottobre 2020
# gst: observing the crystallization process in a droplet
martedì 10 marzo 2020
# gst: apropos of 'transitions', liquid-liquid transitions within a one- component system
mercoledì 26 febbraio 2020
# gst: NS3, how viruses self-cripple their genome replication machinery
sabato 28 dicembre 2019
# gst: scrambling does not necessitate chaos.
sabato 29 giugno 2019
# brain: immagini #CTZ, cicliche fantasmatiche pervasive visioni ricorrenti
<< Vladimir Putin has trumpeted the growth of national populist movements in Europe and America, crowing that liberalism is spent as an ideological force.
In an FT interview in the Kremlin on the eve of the G20 summit in Osaka, Japan, the Russian president said “the liberal idea” had “outlived its purpose” as the public turned against immigration, open borders and multiculturalism. >>
Lionel Barber and Henry Foy in Moscow, and Alex Barker in Osaka. Vladimir Putin says liberalism has 'become obsolete'. FT. Jun 27, 2019
https://www.ft.com/content/670039ec-98f3-11e9-9573-ee5cbb98ed36
FonT
i giochi fisiologici che si giocano su questo pianeta (forse anche altrove) sono giochi 'aperti', all'interno dei due vincoli del gioco 'legale' (sostanzialmente i due vincoli del casino' [#1,#2]); al di fuori dei due vincoli non c'e' auto-struttura, auto-funzione, auto- manutenzione, e dove non c'e' auto- manutenzione la speranza di sopravvivenza - in funzione del tempo - di qualsivoglia sistema vivente cala, smorza, scema, declina; questa sembra la realta' funzionale di un sistema complesso dove le interne sub-unita' sono in continua interazione (non lineare); la propensione di entita' CTZ sensibili, specialmente quando costrette a fronteggiare bi/ multi- forcazioni, di ricondurre i punti di riferimento decisionali alle classiche, storiche, rituali tre 'immagini' (CTZ, appunto) - il 'Campanile', la 'Terra', la 'Zappa' (da li' l'anagramma: 'ne Campa il ZappaTerra') - e' sostanzialmente illusoria perche' i tre punti di riferimento CTZ non permettono all'entita' transeunte di risolvere / reimpostare in modo soddisfacente i suoi problemi, veri o presunti tali; talvolta si ha l'illusione di una risoluzione, che sara' tuttavia irreversibilmente instabile rispetto al tempo; il Campanile e' una immagine che per sua intima natura e' relativa, le teoretiche che lo giustificano, lo sostengono, hanno contorni s-fumati, che scricchiolano (evaporano) dalle troppe contraddizioni interne; la Terra 'trema', anch'essa per sua intima natura, e' transitoria, si incendia, congela, sbricciola, frana, si allaga, viene spazzata periodicamente da vortici d'aria, e' sensibile a imponenti forze esterne, cosmologiche, percio' partecipa attivamente alla compromissione della stabilita' di qualsivoglia Campanile (Totem, Lampione ...); la Zappa e' per sua intima natura un oggetto 'techno', dipende dallo stato dell'arte tecno-scientifica, e attualmente e' in mutazione verso le graziose forme del 'robota', oggetto prospetticamente autonomo, fisicamente, neuralmente (culturalmente?) ...
Il bravo (e fortunato) dr. Albert - Albert Hofmann, chimico con il pallino dell'azzardo sperimentale, un classico ... - aveva forse trovato il giusto approccio, la giusta 'medicina' per offrire 'respiro' anche a lungo termine alle moltitudini entita' CTZ-dipendenti (neuralmente, geneticamente dipendenti?), specialmente se e quando coinvolte in contesti di accidentale modalita' accelerativa transeunte; e' davvero disdicevole che la molecola di Hofmann (LSD [#3]) presenti effetti collaterali non insignificanti; se gli effetti 'epigenetici' sono fisiologicamente troppo lenti per fronteggiare una realta' mutaforma dirompente e pervasiva, allora forse servirebbe una nuova 'magica stringa' [#4] farmacologica o di natura genetica, farmaco-epigenetica, allo scopo di alleviare almeno quegli stati confusionali, depressivi e i comportamenti a-priori lesivi- autolesivi tipici dell'entita' CTZ-dipendenti; anche e senz'altro per quell'altre entita', ben mimetizzate, a loro dire solo apparentemente illusoriamente insensibili a visioni / vincoli CTZ.
Davvero disdicevole accadimento (per i non pochi) lo storico 'salto' dallo 'standard' entita' nomade esploratrice erratica verso il qualcos'altro, ... non e' vero?
[#1] - Notes. 1809 - strutturanti decisioni. Nov 26, 2004.
https://inkpi.blogspot.com/2004/11/1809-strutturanti-decisioni.html
[#2] - Notes. 1821 - i due beffardi vincoli. Nov 26, 2004.
https://inkpi.blogspot.com/2004/11/1821-i-due-beffardi-vincoli.html
[#3] - 'LSD' in: FonT.
https://flashontrack.blogspot.com/search?q=lsd
[#4] - 'magic string' in: FonT. An ethno-drug revisited ... Ayahuasca, prelude of a "magic string" in neuropharmacology. Jul 8, 2018.
https://flashontrack.blogspot.com/2018/07/pharma-ethno-drug-revisited-ayahuasca.html
Also
FonT. JARexit: the ironic probabilistic upshot of the itinerant, escaping IR77, Promobot. Jun 25, 2016.
https://flashontrack.blogspot.com/2016/06/s-bot-jarexit-ironic-probabilistic.html
FonT. The next step of a "liquid society": Jia Jia, they will love "her" ... Jan 10, 2017.
https://flashontrack.blogspot.com/2017/01/n-soc-next-step-of-society-jia-jia-they.html
lunedì 25 marzo 2019
# gst: the auto assembly of a drop (from thermal capillary waves)
<< after single or multiple bridges form due to the presence of thermal capillary waves, the bridge growth commences in a thermal regime. Here, the bridges expand linearly in time much faster than the viscous-capillary speed due to collective molecular jumps near the bridge fronts. Transition to the classical hydrodynamic regime only occurs once the bridge radius exceeds a thermal length scale l_(T) ~ sqrt(Radius). >>
Sreehari Perumanath, Matthew K. Borg, et al. Droplet Coalescence is Initiated by Thermal Motion. Phys. Rev. Lett. 122, 104501 Mar 13, 2019.
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.104501
Supercomputer sheds light on how droplets merge. University of Edinburgh. Mar 20, 2019.
https://m.phys.org/news/2019-03-supercomputer-droplets-merge.html
giovedì 23 agosto 2018
# phyto: a molecular compass to coordinate growth
<< Using this protein [protein BASL: Breaking of Asymmetry in the Stomatal Lineage] to detect the polarity field is like switching a light on in each cell across the tissue. It allows us to see that these cells all have a compass, pointing in the same direction across the leaf >>
<< In this way we will find out if, as we suspect, this molecular compass is a conserved mechanism in the development of plant shapes across the plant kingdom which could be co-opted in different ways by different branches of evolution. >> Catherine Mansfield.
Adrian Galvin. Leaves possess a molecular compass. John Innes Centre. Aug 21, 2018
https://m.phys.org/news/2018-08-molecular-compass.html
Catherine Mansfield, Jacob L. Newman, et al. Ectopic BASL Reveals Tissue Cell Polarity throughout Leaf Development in Arabidopsis thaliana. Current Biology. 28 (16): 2638-46.E4 Aug 20, 2018 doi: 10.1016/j.cub.2018.06.019
https://www.cell.com/current-biology/fulltext/S0960-9822(18)30810-8
venerdì 22 settembre 2017
# gst: chaotic networks inside a chaotic world, a 2015 review by Jennifer
<< Networks grow as individual nodes connect to one another. By tweaking the rules that govern when nodes connect, researchers can shape the network’s properties >>
Jennifer Ouellette. The New Laws of Explosive Networks. Researchers are uncovering the hidden laws that reveal how the Internet grows, how viruses spread, and how financial bubbles burst. Jul 14, 2015.
https://www.quantamagazine.org/how-complex-networks-explode-with-growth-20150714/
also
<< The most celebrated part of this account, however, is at 2.216–93, where Lucretius [Titus Lucretius Carus] maintains that not only to explain how atomic collisions can occur in the first place, but also to account for the evident fact of free will in the animal kingdom, it is necessary to postulate a minimal indeterminacy in the motions of atoms, an unpredictable ‘swerve’ (clinamen) ‘at no fixed place or time’. Otherwise we would all be automata, our motions determined by infinitely extended and unbreakable causal chains >>
Lucretius. 4.Physics. Stanford Encyclopedia of Philosophy. First published Wed Aug 4, 2004; substantive revision Sat Aug 10, 2013
lunedì 26 giugno 2017
# s-evol: Burmese python, mechanisms underlying post-feeding regenerations
<< A research team at the University of Texas at Arlington (..) has been exploring the genomes of snakes and lizards to answer critical questions about these creatures' evolutionary history >>
<< For instance, how did they develop venom?
How do they regenerate their organs?
And how do evolutionarily-derived variations in genes lead to variations in how organisms look and function? >>
Aaron Dubrow. How Pythons Regenerate their Organs and Other Secrets of the Snake Genome. Publ. June 22, 2017
Audra L. Andrew, Blair W. Perry, et al. Growth and stress response mechanisms underlying post-feeding regenerative organ growth in the Burmese python. BMC Genomics 2017 18:338 doi: 10.1186/s12864-017-3743-1 Publ. 2 May 2017
https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-017-3743-1
domenica 28 maggio 2017
# gst-chem: growth by random fluctuations in a curvy fractal structure
<< The weaker interaction causes the molecules to slide past each other and dislocate during crystal growth, resulting in an unusual, irregular crystal. According to Guoquing Zhang, ‘at room temperature, there is a high probability that crystal growth will be dictated by random fluctuations, resulting in a curvy fractal structure’ >>
Thomas Foley. Fractal crystals win fashion design contest. 14 May 2017
https://www.chemistryworld.com/news/fractal-crystals-win-fashion-design-contest/3007277.article
<< The crystals of 1-(4-methoxyphenyl)-3-(pyridin-2-yl)propane-1,3-dione exhibited rarely seen curved fractal structures under an optical microscope. Weak intermolecular interactions may result in dislocation during crystal growth and thus the irregular crystalline structures. The micrographs of the crystals were exploited for their artistic value and were transferred onto fabrics for application in fashion design. >>
Zongzheng Qian, Dongxue Li, et al. Curved fractal structures of pyridine-substituted β-diketone crystals. CrystEngComm. 2017, 19, 2283-2287. doi: 10.1039/C7CE00462A
http://pubs.rsc.org/en/Content/ArticleLanding/2017/CE/C7CE00462A#!divAbstract