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mercoledì 7 novembre 2018

# astro: the strange behavior of Oumuamua (Hawaiian for "scout")

<<  'Oumuamua (1I/2017 U1) is the first object of interstellar origin observed in the Solar system. >>

AA << discuss the possible origins of such an object including the possibility that it might be a lightsail of artificial origin. >>

Shmuel Bialy, Abraham Loeb. Could Solar Radiation Pressure Explain 'Oumuamua's Peculiar Acceleration? arXiv:1810.11490 [astro-ph.EP]. Oct 30, 2018.

https://arxiv.org/abs/1810.11490

Robby Berman. Harvard scientists suggest 'Oumuamua is an alien device. It's an asteroid, it's a comet, it's actually a spacecraft? Nov 6, 2018.

https://bigthink.com/surprising-science/oumuamua-spacecraft-alien-device

NASA utd about 'Oumuamua:

Calla Cofield. NASA Learns More About Interstellar Visitor 'Oumuamua. Nov. 14, 2018.

https://www.nasa.gov/feature/jpl/nasa-learns-more-about-interstellar-visitor-oumuamua




martedì 6 novembre 2018

# gst: how a bubble pops

<< After a bubble bursts at a liquid surface, the collapse of the cavity generates capillary waves, which focus on the axis of symmetry to produce a jet. >>

AA << show that the time-dependent profiles of cavity collapse (..) and jet formation (..) both obey a  inviscid scaling, which results from a balance between surface tension and inertia forces. >>

Ching-Yao Lai, Jens Eggers, and Luc Deike. Bubble Bursting: Universal Cavity and Jet Profiles. Phys. Rev. Lett. 121, 144501. Oct 2, 2018

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.144501  

John Sullivan. Math describes how bubbles pop. Princeton University. Oct 31, 2018.

https://m.phys.org/news/2018-10-math.html

lunedì 5 novembre 2018

# rmx: on the rock called "della Carega", another singular surviving pine tree

<< In mezzo alla devastazione della mareggiata del 29 ottobre 2018 che ha distrutto porti e strade, il piccolo pino di Aleppo, cresciuto sullo scoglio detto della Carega, a forma di sedia, davanti alla strada per Portofino, ha retto. >>

Onde 10 metri, ma pino su scoglio resiste. Cresciuto su roccia tra Santa Margherita Ligure e Portofino. ANSA  GENOVA. 01 Nov 2018 18:22

http://www.ansa.it/sito/notizie/cronaca/2018/11/01/onde-10-metrima-pino-su-scoglio-resiste_01df6541-0e86-48c5-babb-87968adad428.html

Also

2157 - il pino di takata matsubara. Apr 01, 2011.

https://inkpi.blogspot.com/2011/04/2157-il-pino-di-takata-matsubara.html

Sara Malm. The miracle pine: Tree that survived 2011 Japanese tsunami before dying six months ago is rebuilt as monument to 19,000 victims of the disaster. Mar 11, 2013.

https://www.dailymail.co.uk/news/article-2291799/The-miracle-pine-Tree-survived-2011-Japanese-tsunami-dying-months-ago-rebuilt-monument-19-000-victims-disaster.html  

sabato 3 novembre 2018

# behav: to avoid zombification (among humble cockroaches)

<< The emerald jewel wasp (Ampulex compressa) is renowned for its ability to zombify the American cockroach (Periplaneta americana) with a sting to the brain. >>

<< many cockroaches deter wasps with a vigorous defense. Successful cockroaches elevated their bodies, bringing their neck out of reach, and kicked at the wasp with their spiny hind legs, often striking the wasp's head multiple times (..) >>

<< Thus, for a cockroach not to become a zombie, the best strategy is: be vigilant, protect your throat, and strike repeatedly at the head of the attacker. >>

Catania K.C. How Not to Be Turned into a Zombie. Brain Behav Evol. 1-15 Oct 31, 2018.  doi: 10.1159/000490341

https://www.karger.com/Article/Abstract/490341

Karate kicks keep cockroaches from becoming zombies, wasp chow. Vanderbilt University. Oct 31, 2018.

https://m.phys.org/news/2018-10-karate-cockroaches-zombies-wasp-chow.html

Also

<< cockroaches aren’t a nuisance. They’re "gregarious insects" that can teach us about how groups approach collective decision-making. >>

Erin Blakemore. Cockroaches Have Personalities, Too. Smithsonian.com Feb 4, 2015.

https://www.smithsonianmag.com/smart-news/cockroaches-have-personalities-too-180954140

venerdì 2 novembre 2018

# qucpu: a quantum computer in a silicon chip seems closer to reality

AA << demonstrate an integrated device platform incorporating a silicon metal-oxide-semiconductor double quantum dot that is capable of single-spin addressing and control via electron spin resonance, combined with high-fidelity spin readout in the singlet-triplet basis. >>

M. A. Fogarty, K. W. Chan, et al. Integrated silicon qubit platform with single-spin addressability, exchange control and single-shot singlet-triplet readout. Nature Comm. volume 9, Article number: 4370  Oct 30, 2018.

https://www.nature.com/articles/s41467-018-06039-x

Tests show integrated quantum chip operations possible. University of New South Wales. Oct 30, 2018.

https://m.phys.org/news/2018-10-quantum-chip.html

lunedì 29 ottobre 2018

# ai.bot: their names are Rosie and Norman; they could see you soon ...

about Rosie   https://newyork.cbslocal.com/2018/10/16/knightscope-robot-security-patrol/amp

about Norman   http://norman-ai.mit.edu/  

also

https://flashontrack.blogspot.com/search?q=nfulaw

https://flashontrack.blogspot.com/search?q=ai-bot

PS: non e' casuale se ho scelto la forma  "they could see you" anziche' "they could meet you"; "meet" significa "incontro", "to come into contact or conjunction with" percio' comporta anche "scambio"; invece "see" significa qui "osservare", "to perceive by the eye", "to come to know"; Lo "scambio" qui e' assente a priori. Vale a dire "apertura" di  una finestra di osservazione per la raccolta, l'analisi, la modellizzazione delle informazioni, e poi le previsioni, il controllo; e poi anche "blablabla",  anzicheforse. 2018-1030 15:45.


sabato 27 ottobre 2018

# acad: oops! No PhD will be necessary to build artificial intelligence algorithms

<< OVER THE past five years researchers in artificial intelligence have become the rock stars of the technology world (..) The top names can earn over $1m a year. (..) The standard route into these jobs has been a PhD in computer science from one of America’s elite universities. (..) That is changing. This month fast.ai, an education non-profit based in San Francisco, kicked off the third year of its course in deep learning. (..) The course and others like it come with a simple proposition: there is no need to spend years obtaining a PhD in order to practise deep learning. (..) Fast.ai’s course can be completed in just seven weeks. >>

No PhD, no problem. New schemes teach the masses to build AI. Oct 25,  2018.

https://www.economist.com/business/2018/10/27/new-schemes-teach-the-masses-to-build-ai

More

http://www.fast.ai/

https://flashontrack.blogspot.com/2018/06/ai-open-source-ai-projects.html

https://flashontrack.blogspot.com/search?q=linux