sabato 29 aprile 2017

# n-soc: a fading dream

<< the probability for children to attain a higher income than their parents has dropped dramatically -- from more than 90 percent for children born in 1940 to 50 percent for children born in the 1980s >>

Upward mobility has fallen sharply in US: study. Apr.  24,  2017

Raj Chetty, David Grusky, et al. The fading American dream: Trends in absolute income mobility since 1940. Science  28 Apr. 2017:
Vol. 356, Issue 6336, pp. 398-406
DOI: 10.1126/science.aal4617.

venerdì 28 aprile 2017

# n-soc: what differentiates human from machine (at least for now)

<< Growth in the first industrial revolution was driven by engineering, the second through electricity and production lines, and the third by technology and information >>

<< As robots increasingly take on manual labor, we will need to foster what differentiates human from machine (at least for now): creativity >>

Itai Palti. Creativity will be the source of our next industrial revolution, not machines. Apr 11, 2017.

mercoledì 26 aprile 2017

# s-percept: dark perceptions inspired by (quasi-stochastic) clouds

<< "The Scream" is globally famous but there are several different hypotheses as to its inspiration >>

<< The first version of "The Scream" was released in 1893. It depicts a dark humanlike figure clutching its head in apparent horror against the backdrop of a swirling, red-orange sky >>

<< In 2004, American astronomers theorised that Munch had painted a sky brightly coloured by particle pollution from the 1883 Krakatoa volcanic eruption >>

<< But the new paper, presented at a meeting of the European Geosciences Union in Vienna, [Helene Muri, a researcher at the University of Oslo] said he more likely depicted a rare sighting of "mother-of-pearl" clouds over Oslo >>

Mariette  Le  Roux. Weird clouds may have inspired 'The Scream':  scientists. Apr. 24,  2017.


quasi-stochastic poetry

martedì 25 aprile 2017

# s-ecol: living in hypoxic conditions (among Heterocephalus glaber)

<< Naked mole-rats live in large colonies deep underground in hypoxic conditions >>

AA << found that these animals fuel anaerobic glycolysis with fructose by a rewired pathway that avoids tissue damage >>

Thomas J. Park, Jane Reznick, et al. Fructose-driven glycolysis supports anoxia resistance in the naked mole-rat. Science.  21 Apr. 2017 Vol. 356  Issue 6335 pp.307-311 DOI: 10.1126/science.aab3896

<< Ignore the whiskers and teeth - these are plants >>

Thomas Park. Naked mole-rats 'turn into plants' when oxygen is low. Apr. 20, 2017

sabato 22 aprile 2017

# s-gst: concerning a FPUT problem

<< In physics, the Fermi-Pasta-Ulam-Tsingou (FPUT) problem—which found that certain nonlinear systems do not disperse their energy, but rather return to their initial excited states—has been a challenge that scientists have tackled repeatedly since 1955. >>

Grove  Potter. Study unravels  long-held Fermi puzzle tied to nonlinear  systems. Apr. 14,  2017.

<< As  a  by-product,  we  show how  fluctuations  of  system  quantities,  and  thus  the  distribution  functions,  are influenced  by  the  Hertz  potential.  In  particular,  the  variance  of  the  system's  kinetic energy  probability  density  function  is  reduced  by  a  factor  related  to  the  contact potential >>

Michelle Przedborski, Surajit Sen, and Thad A. Harroun. Fluctuations in Hertz chains at equilibrium. Phys. Rev. E 95, 032903 doi: 10.1103/PhysRevE.95.032903  Publ. 6 March 2017

mercoledì 19 aprile 2017

# s-phys: hinting at the bizarreness to come ...

<< "That's what most things that we're used to do," said Forbes [Michael McNeil Forbes], hinting at the bizarreness to come. "With negative mass, if you push something, it accelerates toward you." >>

Eric Sorensen. Physicists create 'negative mass'. Apr. 17, 2017

<< The experimental findings (..) demonstrating that the emerging features — shock waves, soliton trains, self-trapping, etc. — originate from a modified dispersion >>

M. A. Khamehchi, Khalid Hossain, et al. Negative-Mass Hydrodynamics in a Spin-Orbit–Coupled Bose-Einstein Condensate. Phys. Rev. Lett. 118, 155301 – Publ. 10 Apr. 2017. doi 10.1103/PhysRevLett.118.155301

martedì 18 aprile 2017

# s-evol: chaotic self-assembly to evolve prebiotic systems

<< chaotic thermal convection may play a previously unappreciated role in mediating surface-catalyzed synthesis in the prebiotic milieu >>

Aashish Priye, Yuncheng Yu, et al. Synchronized chaotic targeting and acceleration of surface chemistry in prebiotic hydrothermal microenvironments. PNAS vol. 114 no. 6, pp:1275–1280 doi:10.1073/pnas.1612924114

Drew Thompson. Chaotic flows and the origin of life. April 14, 2017

venerdì 14 aprile 2017

# s-gst: l'ineffabile duplice meccanica delle onde di Alfven

<< i dati raccolti da MMS [NASA's Magnetospheric Multiscale (MMS) mission] hanno consentito di osservare due tipi diversi di onde di Alfven. Da una parte, quelle cosiddette “tipiche”, dove le particelle cariche (..) sono libere di correre nel solco fra una cresta e l’altra delle onde del campo magnetico (..). Dall’altra, le onde di Alfven cinetiche, che muovendosi lungo il plasma intrappolano alcuni degli elettroni, facendoli rimbalzare avanti e indietro come fra due muri, o fra due specchi >>

Ecco come le onde di Alfven confinano le particelle. INAF TV. 10 apr 2017.

Daniel J. Gershman, Adolfo F-Vinas, et al. Wave-particle energy exchange directly observed in a kinetic Alfven-branch wave. Nature Communications 8 , Article number: 14719 (2017) doi :10.1038/ncomms14719. Publ. 31 March 2017.

Abhishek Kumar Srivastava, Juie Shetye, et al.  High-frequency torsional Alfven waves as an energy source for coronal heating. Scientific Reports 7 , Article number: 43147 (2017). doi :10.1038/srep43147. Publ. online: 03 March 2017.


poetiche quasistocastiche circa forme d'onda, generiche e im-probabili senz'altro  ...

mercoledì 12 aprile 2017

# s-brain: an individual grey kernel of proto-buddhist compassion inside

<< (..) local grey matter volume in the left anterior superior temporal sulcus, a region in the functionally defined theory of mind or mentalizing network, was associated with the degree to which participants relied on information about innocent intentions to forgive accidental harms >>

Indrajeet Patil, Marta Calo', et al. Neuroanatomical correlates of forgiving unintentional harms. Nature. Scientific Reports 7, Article number: 45967 (2017) doi:10.1038/srep45967. Publ. 06  April  2017


venerdì 7 aprile 2017

# s-age: actions of NAD(+) supplementation in older animals

<< (..) NAD+ directly regulates protein-protein interactions, the modulation of which may protect against cancer, radiation, and aging. >>

Jun Li, Michael S. Bonkowski, et al. A conserved NAD binding pocket that regulates protein-protein interactions during aging. Science  24 Mar 2017:Vol. 355, Issue 6331, pp. 1312-1317 DOI: 10.1126/science.aad8242


lunedì 3 aprile 2017

# s-acad: or at least not as robust as they should be ...

<< This is the conclusion of Rigor Mortis, a wide-ranging critique of the modern biomedical research ecosystem by science journalist Richard Harris. He describes how a growing number of claims over the past decade that many published research findings are false, or at least not as robust as they should be, has led to calls for change, and the birth of a new discipline of metascience. >>

Marcus Munafo'. Metascience: Reproducibility blues. Nature 543, 619–620 (30 March 2017) doi:10.1038/543619a Pub 29 Mar2017

Richard F. Harris. Rigor Mortis: How Sloppy Science Creates Worthless Cures, Crushes Hope, and Wastes Billions. Basic: 2017.

sabato 1 aprile 2017

# s-astro: to peer into a black hole

<< By connecting a global array of radio telescopes together to form the equivalent of a giant Earth-sized telescope – using a technique known as Very Long Baseline Interferometry and Earth-aperture synthesis – scientists will peer into the heart of our Milky Way galaxy where a black hole that is 4m times more massive than our sun – Sagittarius A* – lurks. >>

Carole  Mundell. Astronomers  to  peer  into  a  black  hole  for  first  time  with  new  Event Horizon  Telescope.  17 Mars  2017, 16:17  CET

more: "quantum gravity" in:

FonT: chissa' se modelli formulati per  descrivere metageometrie di buco nero potrebbero, dopo opportuni  adattamenti, descrivere anche specifiche dinamiche al livello macroscopico generate all'interno (e/o al contorno) di enti in reciproca interazione  ...