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9:02 PM | A #miracle out of my window. #sunset

A video posted by Iakovos Ouranos (@iomikron) on Jul 29, 2015 at 2:02pm PDT
A #miracle out of my window. #sunset

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7:49 PM | Dark Matter

Screenshots from science fiction TV series Dark Matter
http://im-possible.info/english/art/films/dark-matter.html

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4:30 PM | How stolen data affects you

You typically hear about data breaches in terms of number of records that were hacked. "A million email addresses were stolen" or "hackers ripped off 100,000 passwords." Does anyone care?…Tags: New York Times, privacy, quiz

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Interactive Trigonometric Ratios

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#533 Breakpoints – A new minimal geometric composition each day.

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Waiting in line stinks. I purposely go to the grocery store during off-times with my son, so I don't have to deal with the long lines. Google, I think currently…Tags: Google, location, traffic

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jpedmaths:Angles in the same segment are equal.

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beautyandthebook:
Flatland: A Romance in Many Dimensions (1884), a whimsical tale of different dimensions that acts as a satire of victorian culture.

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8:23 PM | Inspired by Pink Floyd

Image on the wall, which was inspired by covers of albums of Pink Floyd
by design_guns
http://im-possible.info/english/art/misc/street-art/design_guns.html
Author - https://instagram.com/design_guns/

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Fourier Series Graph Interactive

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#532 Wharf – A new minimal geometric composition each day.

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7:26 AM | Visual introduction to machine learning

What is machine learning? It sounds like a bunch of computers get together in the library on Tuesdays and study during all-nighters. It's not quite that. Stephanie Yee and Tony…Tags: machine learning

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5:00 AM | The Future of Metric?

(Click on the comic if you can't see the full image.) (C)Copyright 2015, C. Burke.Imagine being base 10 in a base 2 world. Come back often for more funny math and geeky comics.

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Catalan numbers for
triangulations
gambler’s ruin
binary trees
trees
…from the Flajolet/Sedgewick coursera analysis of algorithms
in R:
catalan % sum
}
(This is slow above catalan(10) though, so here’s a memoised version. Then if you want to run above catalan(250) you’ll need to adjust options(expressions=5e3) to something higher; otherwise the nesting of calls goes too deep.)

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If you can manage to choose u and v such that u = v =x, then the answer is just (½)x^2, which is easy to remember. Oh, and add a ’+C’ or you’ll get yelled at. [xkcd]

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If you can manage to choose u and v such that u = v =x, then the answer is just (½)x^2, which is easy to remember. Oh, and add a ’+C’ or you’ll get yelled at. [xkcd]

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8:06 PM | Panel from comics about Doctor Strange

Escher inspired panel from comics about Doctor Strange.
http://im-possible.info/english/art/comics/doctor-strange.html

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Incarceration costs a lot of money. We know this, sort of. But how much really? Million Dollar Blocks, by Daniel Cooper and Ryan Lugalia-Hollon, estimates the cost in Chicago, down…Tags: economics, incarceration

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4:00 PM | Belated Shark Week

Sharks seem to be a beach menace this summer from North Carolina beaches, South African surf competitions, to TV movies.But for some perspective, above is a dramatic, graphic comparison of the number of people killed by sharks per year and number of sharks killed by people PER HOUR. About 12 people are killed by sharks each year, and over 11,000 sharks are killed PER HOUR by people. The image above is just the beginning of a long graphic scroll of shark death. Here is the bottom of the […]

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#531 I/O – A new minimal geometric composition each day.

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Interactive Conics Graph So cool!

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We usually see Census data in aggregate. It comes in choropleth maps or as statistics about various subpopulations and geographies. Is there value in seeing the numbers as individuals? What…Tags: census, FiveThirtyEight, human, Twitter

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the Kapranov-Reznikov-Mazur dictionary between knots and arithmetic primes

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12:25 AM | La recta en el plano

Esquema rápido que relaciona las formas principales de la ecuación de una recta en el plano y el modo de pasar de una a otra a partir de las relaciones entre coeficientes, vector y pendiente. Es muy útil para comprender la … Sigue leyendo →

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ted:Happy Valentine’s Day to our favorite nerds. Learn how to use math to rig your love life»

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Favorite corner in #workplace with #pencils #brushes #inks and a new work in progress.

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8:09 PM | Skull with impossible triangle

Images by Mark Andrew Chapman (chappo)
http://im-possible.info/english/art/misc/tattoo/mark-chapman.html
Author - https://instagram.com/chappo__/

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6:38 PM | Form Constants of Optical Mineralogy

Chromatic Polarisation of Light (German, unknown) [1895] The Virtual Museum of the History of Mineralogy contains a large collection of scans from monographs on crystallography and mineralogy, arranged by author in alphabetical order, from 1450 to 1912. The chromolithographs of optical interference figures, mostly from the 19th century record the passage of light through crystal […]

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#pencils and #charcoal , #brushes and #pen…

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di diffusione della scienza e rivoluzioni cc @aubreymcfato @CristianCantoro Utilizzare i dati sulle citazioni in Wikipedia per misurare la diffusione dell'open accessScrivevo all'inizio del 2011 per i festeggiamenti del wiki-decennale di una rivoluzione irreversibile. E' stato piuttosto interessante leggere il titolo che technology review ha utilizzato per raccontare dell'ultimo degli articoli dedicati all'enciclopedia libera: Why Wikipedia + Open Access = Revolution.L'idea degli autori, Misha
[…]

Nielsen, F. (2007). Scientific citations in Wikipedia, First Monday, 12 (8) DOI: 10.5210/fm.v12i8.1997

Heather Ford, Shilad Sen, David R. Musicant & Nathaniel Miller (2013). Getting to the source: where does Wikipedia get its information from?, Proceedings of the 9th International Symposium on Open Collaboration, DOI: 10.1145/2491055.2491064

Misha Teplitskiy, Grace Lu & Eamon Duede (2015). Amplifying the Impact of Open Access: Wikipedia and the Diffusion of Science, Wikipedia Workshop at 9th International Conference on Web and Social Media (ICWSM), arXiv: 1506.07608v1

Citation

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After (or before?) @StartsWithABang's balloon animals' post? A couple of week ago Ethan Siegel published a post about ballon animals, so I decide to repost an old piece that I wrote in 2011 for my italian blog: the english version is lost, but it is magically reposted here! Two one-balloon constructions and their associated graphsI recently discovered this interesting site, vihart. In the site there are some interesting paper and today I want to write something about Computational Balloon
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Demaine E.D., Demaine M.L. & Hart V. (2008). Computational balloon twisting: The theory of balloon polyhedra., Proceedings of the 20th Canadian Conference on Computational Geometry (CCCG2008), 139-142.

Bryś K. & Lonc Z. (2009). Polynomial cases of graph decomposition: A complete solution of Holyer's problem, Discrete Mathematics, 309 (6) 1294-1326. DOI: 10.1016/j.disc.2008.01.054

Citation

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Supponiamo di doverci confrontare con un animale, ad esempio un cane o un lupo (o più in generale con un animale, addomesticato o selvaggio). Secondo Konrad Lorenz il comportamento aggressivo di un cane viene influenzato da due stati d'animo differenti: l'ira e la paura.Si può allora provare a prevedere il comportamento del cane in funzione di quale dei due stati domina: nel caso in cui l'animale è dominato da paura o da ira, proporre una previsione è abbastanza semplice; nel caso in cui il […]

Zeeman E.C. (1976). Catastrophe Theory, Scientific American, 234 65-83. DOI: 10.1038/scientificamerican0476-65

Jean Petitot (2013). Complexity and self-organization in Turing, The Legacy of A.M. Turing, (E. Agazzi, ed.), Franco Angeli, Milano, 149-182. arXiv: 1502.05328v1

Citation

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Non prevedevo di scrivere la versione italiana di un post sull'ultima news proveniente dal RHIC, ma mi è stato gentilmente chiesto, e provvedo ben volentieri. Inizio, però, con un piccolo cappello, alla fine del quale saprete che c'è anche un piccolissimo pezzetto (il doppio diminutivo è perché i firmatari del papero su arXiv sono veramente tanti) d'Italia in questa interessante scoperta.Tutto nasce da un post, nel flusso twittero, di Annalisa Arci, in cui racconta, in maniera e con un […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv, arXiv: 1504.02175v2

Citation

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A new clue about the #quarkgluonplasma from @RHIC_STAR at @BrookhavenLabWithin the particles that constitute atomic nuclei, protons and neutrons, there are the quarks, the elementary particles with fractional charges, linked to each other thanks to the gluons, bosons that carry the nuclear interaction. Thanks to the gluons it is impossible to observe, at present, free quarks, but it is expected that in the very first stage of the universe, matter was in a state called quark-gluon plasma. Thanks […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv: 1504.02175v2

Citation

fawnpnguyen tweeted: @fawnpnguyen

RT @mrgarychu: "The ancient art of math..doesn't reward speed so much as patience, cunning...collaboration & improv." via @nytimes - http:/…

2015-07-30 05:14:03

OraclMachine tweeted: @OraclMachine

中国宣称抗菌洁具都是骗人，用100%纯酒精都没法杀灭上面的细菌。反观日本生产的洁具只用75%稀释过的酒精就能全部灭活。RT @maylogcom: 中国的钢材质量堪忧，只要被稀硫酸浸泡就腐蚀的不成样子。反观德国的钢材，被浓硫酸泡了都没事。

2015-07-30 05:09:38

loronegro tweeted: @loronegro

De cuando uno se siente tan desquiciado como Will Graham.

2015-07-30 04:39:06

bobloch tweeted: @bobloch

@mathhombre @Desmos I bet she hates puppies and the first daffodils of spring as well

2015-07-30 04:38:33

MindAfterMath tweeted: @MindAfterMath

How Could You Possibly Love/Hate Math? http://t.co/fGLRJgivZq #compsci #datascience #math #stem #mathchat

2015-07-30 04:09:33

DrMathochist tweeted: @DrMathochist

This.. this is a joke, right? Kicker: the tagline. https://t.co/Xjh5HdwVzI

2015-07-30 04:05:49

romathio tweeted: @romathio

Dodger Dogs ✔️, Sweatshirts for a ballgame ✔️, Dodgers in the lead✔️… https://t.co/KlQqICe5Xt

2015-07-30 03:13:20

evelynjlamb tweeted: @evelynjlamb

Excited about my #BridgesMathArt15 workshop tmrw on math+music! Info+ worksheet here http://t.co/QAx9kN02yW

2015-07-30 02:26:51

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