# phys: oscillating quasiparticles, decay and rebirth

<< Admittedly, quasiparticles do decay, however new, identical particle entities emerge from the debris," (..) If this decay proceeds very quickly, an inverse reaction will occur after a certain time and the debris will converge again. This process can recur endlessly and a sustained oscillation between decay and rebirth emerges. >> Ruben Verresen.

Oscillating quasiparticles: the cycle of decay and rebirth. Technical University Munich. June 14, 2019.

https://m.phys.org/news/2019-06-oscillating-quasiparticles-rebirth.html 

Ruben Verresen, Roderich Moessner,  Frank Pollmann. Avoided quasiparticle decay from strong quantum interactions. Nature Physics. doi: 10.1038/s41567-019-0535-3 May 27, 2019.

https://www.nature.com/articles/s41567-019-0535-3   

# font: today the first thousandth FlashOnTrack, "all I know is that Joe plays (guitar) like a mofo", by Ozzy.

<< "Even though I've only been playing with Joe (Joe Holmes) for a short time," says Osbourne (Ozzy Osbourne), "the truth is that this band could get up on stage right now and smoke any other band I've ever had. I don't know much about Joe's history and I don't care-all I know is that he plays (guitar) like a motherfucker." >>

http://members.tripod.com/slash_0_0_x_x/ozz_int.html

Clerk, Carol (20 Nov 2002). Diary of a Madman: Ozzy Osbourne - The Stories Behind the Songs. New York, NY: Thunder Mountain Press. pp. 124, 135. ISBN 1-56025-472-6.

https://en.m.wikipedia.org/wiki/Joe_Holmes 

Ozzy Osbourne, Joe Holmes, Chile 1995

https://youtu.be/_fY9I3ySSfs

Joe Holmes with Ozzy 1995-2000

https://www.youtube.com/playlist?list=PLC1D6F56E1F77C2BE

FonT

qui Ozzy forse ha voluto sottolineare la differenza sostanziale tra entita' che sanno generare/ accompagnare "perturbazioni" con talento e grazia (Joe) vs entita' "altre" (sprovviste di/ carenti in/ tali caratteristiche).

Also

"Jazz". Notes, 2006-2007

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

"Jelly Roll". Notes, 2007

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

# gst: "diffusing wave paradox", synthetic microswimmers can mimic the behavior of Amoeba

<< Amoeba are unusual creatures that form when a dispersed population of cells spontaneously comes together and reorganizes itself into a multicellular macroscopic organism. To do this, a few leader cells emit chemical pulses that cause the other individual cells to move in the direction opposite to that of the traveling pulses (the "diffusing wave paradox," ), leading to the formation of dense clusters. >>

<< In experiments, the researchers used spherical particles that are half-coated by a carbon cap and placed in a viscous liquid. When illuminated by light, the particles propel themselves forward with the cap in front. >>

<< At low pulse speeds, the particles have enough time to reorient themselves, if needed, so that their caps are facing in the same direction as that of the traveling pulses. This orientation ensures that the particles travel in the same direction as the pulses. >>

<< At high pulse speeds, on the other hand, the pulses come too quickly for the particles to reorient themselves before the next one comes. This is because the speed of the particles' rotation is limited by the friction of the viscous liquid. So if the particles' caps are initially facing the oncoming pulses, the particles will move counter to the direction of the traveling pulses, resembling the behavior of amoeba in the diffusing wave paradox. >>

Lisa Zyga. Diffusing wave paradox may be used to design micro-robotics. Jun 12, 2019.

https://m.phys.org/news/2019-06-diffusing-paradox-micro-robotics.html

Celia Lozano, Clemens Bechinger. Diffusing wave paradox of phototactic particles in traveling light pulses. Nature Communications 10, Article number: 2495.  Jun 7, 2019.

https://www.nature.com/articles/s41467-019-10535-z

# brain: humans could be uniquely sensitive to pitch

<< our brains may be uniquely sensitive to pitch, the harmonic sounds we hear when listening to speech or music. >>

<< The results raise the possibility that these sounds, which are embedded in speech and music, may have shaped the basic organization of the human brain. >> Bevil Conway

Our brains appear uniquely tuned for musical pitch. National Institutes of Health. Jun 10, 2019.

https://m.medicalxpress.com/news/2019-06-brains-uniquely-tuned-musical-pitch.html

Sam V. Norman-Haignere, Nancy Kanwisher, et al. Divergence in the functional organization of human and macaque auditory cortex revealed by fMRI responses to harmonic tones.
Nature Neuroscience. Jun 10, 2019

https://www.nature.com/articles/s41593-019-0410-7

# gst: apropos of bubbles, how simple foams collapse

<< When a bubble breaks, (AA) found that a collapse event propagates via impact with the receding film and tiny scattered droplets breaking other bubbles. >>

<< A key finding was that changing the viscosity of the fluid did not lead to a significant change in the number of bubbles broken. Methods to stabilize foams commonly rely on changing the viscosity, yet the team's findings clearly show how both the number of bubbles collapsed and the velocity of the receding film are unaffected. >>

Two distinct physical mechanisms identified for how simple foams collapse. Tokyo Metropolitan University. June 10, 2019.

https://m.phys.org/news/2019-06-distinct-physical-mechanisms-simple-foams.html

Naoya Yanagisawa, Rei Kurita. In-situ observation of collective bubble collapse dynamics in a quasi-two-dimensional foam. Scientific Reports 9, Article number: 5152. March 26, 2019

https://www.nature.com/articles/s41598-019-41486-6

# hack: oops! breaking the 2048-bit RSA encryption in 8h (back to the "Pizzinu" docs?)

<< A new study shows that quantum technology will catch up with today’s encryption standards much sooner than expected. That should worry anybody who needs to store data securely for 25 years or so. >>

How a quantum computer could break 2048-bit RSA encryption in 8 hours. Emerging Technology from the arXiv May 30, 2019.

https://www.technologyreview.com/s/613596/how-a-quantum-computer-could-break-2048-bit-rsa-encryption-in-8-hours

<< When factoring 2048 bit RSA integers, our construction's spacetime volume is a hundredfold less than comparable estimates from earlier works. >>

Craig Gidney, Martin Ekera. How to factor 2048 bit RSA integers in 8 hours using 20 million noisy qubits.  arXiv:1905.09749v1 [quant-ph]

https://arxiv.org/abs/1905.09749

"pizzinu"

http://www.treccani.it/vocabolario/pizzino

Also

Crackin' as a snap. FonT. Dec 6, 2015

https://flashontrack.blogspot.com/2015/12/s-phys-tech-bot-crackin-as-snap.html

# gst: triggering earthquakes, even the slightest stress can set off a tremor

<< A new study reveals the inner workings of tidally triggered earthquakes, and finds that even the slightest stress can set off a tremor. >>

Solved: How tides can trigger earthquakes. Earth Institute At  Columbia University. Jun 7, 2019.

https://www.eurekalert.org/pub_releases/2019-06/eiac-sht060519.php

<< The strong tidal triggering of mid-ocean ridge earthquakes has remained unexplained because the earthquakes occur preferentially during low tide, when normal faulting earthquakes should be inhibited. >>

AA << show that the axial magma chamber inflates/deflates in response to tidal stresses, producing Coulomb stresses on the faults that are opposite in sign to those produced by the tides. When the magma chamber’s bulk modulus is sufficiently low, the phase of tidal triggering is inverted. >>

Christopher H. Scholz, Yen Joe Tan, Fabien Albino. The mechanism of tidal triggering of earthquakes at mid-ocean ridges. Nature Communications 10, Article number: 2526 June 7, 2019.

https://www.nature.com/articles/s41467-019-10605-2