martedì 22 agosto 2017

# gst: concerning turbulences, turbulence researchers & lovers ...

<< Charles Doering, a mathematical physicist at the University of Michigan in Ann Arbor, says he hopes that the approach might ultimately point the way to a model of turbulence that is simpler to use than the Navier–Stokes equations, and works in all situations. That is the “grand dream”, he says >>

Davide Castelvecchi. Mysteries of turbulence unravelled. Simulations follow how swirls in a fluid transfer and dissipate energy. Aug 21, 2017 Corrected: Aug 22, 2017


"a model of turbulence that is simpler to use (..) and works in all situations"; una intelligenza artificiale, anche genericamente  di "media forza" sara' senz'altro in totale accordo con Charles Doering.

lunedì 21 agosto 2017

# gene: 99 loci to drive general cognitive function

AA << combined cognitive and genetic data from the CHARGE and COGENT consortia, and UK Biobank (total N=280,360; age range = 16 to 102) >>

AA << found 9,714 genome-wide significant SNPs  [Single Nucleotide Polymorphism] (P<5 x 10-8) in 99 independent loci >>

<< Among many novel genes associated with general cognitive function were SGCZ, ATXN1, MAPT, AUTS2, and P2RY6 >>

Gail Davies, Max Lam, et al. Ninety-nine independent genetic loci influencing general cognitive function include genes associated with brain health and structure (N = 280,360). biorxiv. doi: 10.1101/176511 Aug18, 2017.


il sistema a 3 palle in fisica (three-body problem) qui genericamente estensibile a 99 ...

three-body problem:

Jon Cartwright. Physicists  Discover a Whopping 13 New  Solutions to Three-Body  Problem. Mar. 8, 2013

Institute  of  Physics  Belgrade. Three-body gallery

sabato 19 agosto 2017

# phyto: feel sounds to spot water

AA << used the model plant Pisum sativum to investigate the mechanism by which roots sense and locate water >>

AA << found that roots were able to locate a water source by sensing the vibrations generated by water moving inside pipes, even in the absence of substrate moisture. When both moisture and acoustic cues were available, roots preferentially used moisture in the soil over acoustic vibrations, suggesting that acoustic gradients enable roots to broadly detect a water source at a distance, while moisture gradients help them to reach their target more accurately >>

AA << results also showed that the presence of noise affected the abilities of roots to perceive and respond correctly to the surrounding soundscape >>

Monica Gagliano, Mavra Grimonprez, et al. Tuned in: plant roots use sound to locate water. Oecologia. Volume 184, Issue 1, pp 151–160. May 2017

venerdì 18 agosto 2017

# websec: everyone is a target (N3v$r M1^d!), by Kevin

<< At the end of the day, Cardwell [Kevin Cardwell] notes that "no product will make you secure." What's important is setting up a process of defenses because he says, "everyone is a target." >>

Leah Becerra. How to protect your data from cyberattacks. The Kansas City Star. May 25, 2017


<< “Much of what I did I now regret,” Burr [Bill Burr], who is now retired, told the Wall Street Journal. “In the end, it was probably too complicated for a lot of folks to understand very well, and the truth is, it was barking up the wrong tree.” >>

James Titcomb. Password guru who told the world to make them complicated admits: I got it completely wrong. 8 Aug 8, 2017

Robert McMillan. The Man Who Wrote Those Password Rules Has a New Tip: N3v$r M1^d! Aug. 7, 2017

giovedì 17 agosto 2017

# s-acad: the nomad razor by Richard

<< Over drinks one evening, a Christian journalist described witnessing an episode of faith healing. Instead of dismissing the story outright, Dawkins pressed for details >>

<< Some people define atheism as a positive conviction that there are no gods and agnosticism as allowing for the possibility, however slight. In this sense I am agnostic, as any scientist would be. But only in the same way I am agnostic about leprechauns and fairies. Other people define agnosticism as the belief that the existence of gods is as probable as their nonexistence.  In this sense I am certainly not agnostic >> Richard Dawkins

John  Horgan.  Richard Dawkins Offers Advice for Donald Trump, and Other Wisdom. Aug 10, 2017.

mercoledì 16 agosto 2017

# s-behav: they behave strangely in the darkness caused by a solar eclipse

<< Many accounts of solar eclipses include tales of animals behaving strangely >>

<< There’s a lot of anecdotal evidence for how animals and even plants respond to totality [of solar eclipses] >>

<< Crickets chirped and frogs croaked [..]  Gnats and mosquitoes swarmed [..] Bees returned to hives and chickens to roost >>

<< small, light-sensitive crustaceans and zooplankton swam upward toward the dark during eclipses, similar to how the tiny animals behave at night >>

<< The sun’s disappearance prompted orb weaver spiders to take down their webs >>

<< captive chimpanzees scaled a climbing structure and faced the blocked sun >>

Lisa Grossman. What do plants and animals do during an eclipse?
A citizen science project aims to gather data to put science behind anecdotal evidence. Aug 12, 2017

<< The behavior of colonial orb-weaving spiders (Metepeira incrassata) in tropical Veracruz, Mexico was studied during the total solar eclipse on July 11, 1991. Spiders behaved in a manner typical of daily activity until totality, when many began taking down webs. After solar reappearance, most spiders that had begun taking down webs rebuilt them >>

Uetz, G.W., Hieber, C.S., et al.     Behavior of Colonial Orb-weaving Spiders during a Solar Eclipse. Ethology, 96: 24–32. Jan 12, 1994. doi:10.1111/j.1439-0310.1994.tb00878.x

<< This year, the California Academy of Sciences is soliciting citizen scientists to record their observations of any animals they see using the academy’s iNaturalist app >>

Solar Eclipse 2017: Life Responds.

domenica 13 agosto 2017

# n-soc: charlottesville, what to do now, by Jeffrey

<< The question is: what to do now? The answer lies in the source of the problem. The huge mess began with bad ideas. The only means available – and it is the most powerful – is to fight bad ideas with good ideas. >>

<< What are those good ideas?  The progress of the last 500 years shows us precisely what the good ideas are: social harmony, human rights, the aspiration of universal dignity, the conviction that we can work together in mutual advantage, the market economy as a means of peace and prosperity, and, above all else, the beauty and magnificence of the idea of liberty itself. >>

Jeffrey A. Tucker. The Violence in Charlottesville. Aug 12, 2017


# n-laws: nashville looks back. Apr 8, 2016.