# 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.

https://m.phys.org/news/2017-04-unravels-long-held-fermi-puzzle-tied.html

<< 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

https://journals.aps.org/pre/abstract/10.1103/PhysRevE.95.032903

# 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

https://m.phys.org/news/2017-04-physicists-negative-mass.html

<< 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

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.155301

# 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

http://m.pnas.org/content/114/6/1275

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

https://m.phys.org/news/2017-04-chaotic-life.html

# 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.

https://m.youtube.com/watch?v=z-SbeUpWCeQ&feature=youtu.be

http://www.media.inaf.it/

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.

https://www.nature.com/articles/ncomms14719

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.

https://www.nature.com/articles/srep43147

also:

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

http://inkpi.blogspot.it/search?q=onda

# 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

https://www.nature.com/articles/srep45967

also:

https://www.ncbi.nlm.nih.gov/m/pubmed/?term=%22Theory+of+Mind%22

https://www.ncbi.nlm.nih.gov/m/pubmed/?term=brain+buddhism

https://www.ncbi.nlm.nih.gov/m/pubmed/?term=brain+meditation

# img: erratic tray

# 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

http://science.sciencemag.org/content/355/6331/1312

also:

https://www.ncbi.nlm.nih.gov/m/pubmed/?term=ageing+nad