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giovedì 21 settembre 2017

# qubit-ai: inside the qubit AI neural “black boxes”

<< Neural networks’ powers of prediction have fueled the recent AI boom, but it can be hard to explain how they reach their decisions. A new technique aimed at uncovering the inner workings of language processing networks is just the latest effort to shed some light on these “black boxes.” >>

<< Going a step further, some researchers are trying to create AI able to explain its decisions to lay people, not just experts >>

Edd Gent. Machines Are Getting Smarter—Now They Should Explain Themselves. Sep 19, 2017

https://singularityhub.com/2017/09/19/machines-are-getting-smarter-now-they-should-explain-themselves/

FonT

"but it can be hard to explain how they [AI machines] reach their decisions"

An easy prediction: "Qubit AI  Machines" will never fully explain themselves.

mercoledì 20 settembre 2017

# game: low-cooperativity feedbacks in burst size could be preferable for noisy proteins

AA << consider a specific kind of negative feedback, which makes bursts smaller in the excess of protein >>

<< Increasing the strength of the feedback may lead to dramatically different outcomes depending on a key parameter, the noise load >>

<< for noise loads smaller than critical, the coefficient of variation remains bounded with increasing feedback strength; contrastingly, if the noise load is larger than critical, the coefficient of variation diverges to infinity in the limit of ever greater feedback strengths >>

<< Interestingly, high-cooperativity feedbacks have lower critical noise loads, implying that low-cooperativity feedbacks in burst size can be preferable for noisy proteins >>

Pavol Bokes, Abhyudai Singh, Yen Ting Lin. High Cooperativity In Negative Feedback Can Amplify Noisy Gene Expression. biorxiv sysbio. doi: 10.1101/125914  April 10, 2017.

http://www.biorxiv.org/content/early/2017/04/10/125914

lunedì 18 settembre 2017

# soc: pulsatile self-destructive choices, by Oliver and Julia

<< Let’s all be thankful that FiveThirtyEight readers don’t control America’s nuclear arsenal >>

Last week AA << published an article on the game theory of nuclear standoffs. That article included an interactive game ... >>

Oliver Roeder, Julia Wolfe. Thank God You People Don’t Have The Nuclear Codes. Sep. 14, 2017.

https://fivethirtyeight.com/features/thank-god-you-people-dont-have-the-nuclear-codes/

<< Shall we play a game? >>

Oliver Roeder. How To Win A Nuclear Standoff. President Trump and Kim Jong Un’s saber-rattling is dangerous, but not irrational. Sep. 6, 2017

https://fivethirtyeight.com/features/how-to-win-a-nuclear-standoff/

domenica 17 settembre 2017

# acad: ig-nobel 2017; not so evanescent but intriguing: contact with a live crocodile actually could affects a person's willingness to gamble

<< ECONOMICS PRIZE [AUSTRALIA, USA] — Matthew Rockloff and Nancy Greer, for their experiments to see how contact with a live crocodile affects a person's willingness to gamble.
REFERENCE: "Never Smile at a Crocodile: Betting on Electronic Gaming Machines is Intensified by Reptile-Induced Arousal," Matthew J. Rockloff and Nancy Greer, Journal of Gambling Studies, vol. 26, no. 4, December 2010, pp. 571-81. WHO ATTENDED THE CEREMONY: Matthew Rockloff and Nancy Greer >>

http://www.improbable.com/ig/winners/

Mark Pratt. Research on big ears, crocodile gambling wins Ig Nobels. Sep 14, 2017

https://m.phys.org/news/2017-09-big-ears-crocodile-gambling-ig.html

<< Tourists at the Koorana Saltwater Crocodile Farm in Coowonga, Queensland, Australia (..) were randomly assigned to play a laptop-simulated Electronic Gaming Machine (EGM) either: (1) prior to entry, or (2) after having held a 1-m saltwater-crocodile >>

<< At-risk gamblers with few self-reported negative emotions placed higher average bets at the EGM after having held the crocodile when compared to the control >>

<< high arousal can intensify gambling in at-risk players, but only if this feeling state is not perceived as a negative emotion >>

Matthew J. Rockloff, Nancy Greer. Never Smile at a Crocodile: Betting on Electronic Gaming Machines is Intensified by Reptile-Induced Arousal. Journal of Gambling Studies.  2010;  Vol 26, Issue 4, pp 571–581. Jan 6, 2010.

https://link.springer.com/article/10.1007/s10899-009-9174-4

sabato 16 settembre 2017

# age: autophagy inactivation (e.g. in neurons) to reverse the effects of age (50% extension of life) in the whole old body (post-reproductive C. elegans)

AA << identified that the inactivation of genes governing the early stages of autophagy up until the stage of vesicle nucleation, such as bec-1, strongly extend both life span and health span >>

AA << demonstrate that the improvements in health and longevity are mediated through the neurons, resulting in reduced neurodegeneration and sarcopenia >>

AA << propose that autophagy switches from advantageous to harmful in the context of an age-associated dysfunction >>

Thomas Wilhelm, Jonathan Byrne, et al.  Neuronal inhibition of the autophagy nucleation complex extends life span in post-reproductive C. elegans. Genes & Dev. Sep 7, 2017 doi: 10.1101/gad.301648

http://m.genesdev.cshlp.org/content/31/15/1561

<< By inactivating autophagy in the neurons of old worms they were not only able to prolong the worms life but they increased the total health of the worms dramatically >>

Why we did not evolve to live forever: Unveiling the mystery of  why we age.  Breakthrough in  understanding the origin of the  ageing process. Sep 07,  2017

http://www.uni-mainz.de/presse/aktuell/2595_ENG_HTML.php

Why we did not evolve to live forever: Unveiling the mystery of why we age. Sep 15, 2017.

https://www.sciencedaily.com/releases/2017/09/170915144151.htm

venerdì 15 settembre 2017

# websec: post-quantum cryptography, all of today's secrets will be lost (!)

AA << analyze the options available for a post-quantum cryptography future >>

<< The expectation is that quantum computers will be built some time after 2025 >>

<< An attacker can record our secure communications today, and break it with a quantum computer years later. All of today's secrets will be lost >> Tanja Lange

How future quantum computers will threaten today's encrypted data. Sep 14, 2017

https://m.phys.org/news/2017-09-future-quantum-threaten-today-encrypted.html

Daniel J. Bernstein, Tanja Lange. Post-quantum cryptography.     Nature 2017; 549: 188–194 Sep 14, 2017 doi: 10.1038/nature23461

https://www.nature.com/nature/journal/v549/n7671/full/nature23461.html

giovedì 14 settembre 2017

# behav: scratch, also to socialize

<< Primates (including humans) scratch when stressed >>

<< scratching could potentially have social function >>

Jamie Whitehouse, Jerome Micheletta, Bridget M. Waller. Stress behaviours buffer macaques from aggression. SciRep  2017; 7(11083) doi: 10.1038/s41598-017-10754-8 Sept 11, 2017

https://www.nature.com/articles/s41598-017-10754-8