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Shared Circles including Florent Jaby

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Top posts in the last 50 posts

Most comments: 8

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2014-09-05 12:19:06 (8 comments, 4 reshares, 14 +1s)Open 

A guide to using vous or tu in french.

Most reshares: 9

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2014-07-15 09:12:07 (2 comments, 9 reshares, 26 +1s)Open 

The future is now

Most plusones: 26

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2014-07-15 09:12:07 (2 comments, 9 reshares, 26 +1s)Open 

The future is now

Latest 50 posts

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2015-04-04 11:58:28 (0 comments, 0 reshares, 1 +1s)Open 

New blog post Browser as an Interactive Disassembly Navigation Tool (and it's not about V8 or JavaScript :))

http://mrale.ph/blog/2015/03/29/browser-as-an-interactive-disassembler.html

New blog post Browser as an Interactive Disassembly Navigation Tool (and it's not about V8 or JavaScript :))

http://mrale.ph/blog/2015/03/29/browser-as-an-interactive-disassembler.html___

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2015-03-22 19:11:57 (1 comments, 1 reshares, 22 +1s)Open 

Waitwut?...

Waitwut?...___

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2015-03-10 21:42:52 (1 comments, 1 reshares, 3 +1s)Open 

Some unusual science for the day: Using modern computer science to understand just where Rock n' Roll came from. Normally, people who talk about the history of music break it down into genres which have a lot to do with marketing, country of origin, and so on, and talk about individual bands as historical influences on each other. But these boundaries can be quite arbitrary: for example, "gospel" and "rock" are considered very far apart, but if you go back to the 1950's, rock was so influenced by gospel that it was hard to tell them apart at times.

So these researchers tried something else. They analyzed the songs which topped the US charts from 1960 to 2010, about 17,000 in all. For each song, they examined features not of the marketing around the music, but of the music itself: instrumentation, chord changes, timbre, types of harmony. They then used a technique... more »

Some unusual science for the day: Using modern computer science to understand just where Rock n' Roll came from. Normally, people who talk about the history of music break it down into genres which have a lot to do with marketing, country of origin, and so on, and talk about individual bands as historical influences on each other. But these boundaries can be quite arbitrary: for example, "gospel" and "rock" are considered very far apart, but if you go back to the 1950's, rock was so influenced by gospel that it was hard to tell them apart at times.

So these researchers tried something else. They analyzed the songs which topped the US charts from 1960 to 2010, about 17,000 in all. For each song, they examined features not of the marketing around the music, but of the music itself: instrumentation, chord changes, timbre, types of harmony. They then used a technique called "k-means" to find the natural clusters into which the songs fell by these measures, and found thirteen natural groupings. To understand these groupings better, they adapted a technique from molecular genetics which is used to understand the functions of genes: they took song tags from last.fm, and did a mathematical analysis to see which song tags were most strongly associated with each cluster. (For example, if one cluster had songs tagged "R&B" far more often than the other clusters did, it's a good sign that this tag describes the cluster) 

They came up with 13 clusters -- what you might call the "purely musical" genres of the music, since they're based entirely on the songs' musical qualities, not on the politics or marketing around them. These ranged from cluster #2 (hip hop / rap / gangsta rap / old school) to #9 (classic rock / country / rock / singer-songwriter) to #8 (dance / new wave / pop / electronic). 

The image you see a bit of below is the history of the popularity of these genres over time, with 1960 at the bottom of the graph and 2010 at the top. You can see the sudden rise of rap (leftmost column), the gradual vanishing of jazz and the blues from the charts (the dwindling figure center-right), and the coming and going of hard rock (the dark blue bubbly thing at the center).

Interestingly, they have answered one important historical question, about the significance of the British Invasion: apparently no, this was not the key catalyst of the revolution in American music; the revolution was already well underway before the Beatles arrived in 1964. (Which shouldn't really surprise people too much, given that this is where rock came from) 

If you look at the bottom of the image, you'll notice a tree structure which the summary on the arXiv blog doesn't talk about; you'll have to read the article itself (http://arxiv.org/pdf/1502.05417v1.pdf) for that. It's basically a genetic tree of these genres of music. This is constructed using the same techniques of "genetic relatedness" which are used to create modern evolutionary trees of species, only instead of being based on DNA snippets, they're based on those underlying musical features like chord changes which were the basis of the clustering. So you can see (for example) that hip-hop comes from a completely different ancestry than all the other observed genres, while pairs like country and classic rock are close relatives.

Why is this interesting? Apart from the obvious fun of studying music history using the methods of molecular biology, it shows the ways in which these techniques can be used to describe a whole host of things. To make this work, what you need is a large sample of items to classify (here, songs); for each item, a large collection of features to measure (a few hundred at least; in this case, things like chord changes and instrumentation); and if you want to be able to describe the function of these features, have functional labels (here, song tags) for at least a good collection of the items you want to classify. Then you can do a "genetic analysis," grouping them into families, observing family trees, and (if you have additional data, like the year of release in this case) understand things like the evolution of these groups over time or space.

What's marvelous is that you can do this sort of analysis with all sorts of things. Do it on news articles, with the features being words, and you'll discover that they cluster into stories, which in turn cluster into subjects. (Why? Because you'll see, say, a bunch of stories with the word "Brezhnev" which also include references to the USSR, and these come and go over time, and at later times start to also include stories about "Andropov," "Chernenko," and "Gorbachev." Depending on how finely you slice these, you can either see the life of a politician, or the history of the Soviet Union.) Do it on a city's road network, with features involving the number of cars on each chunk of the road at a given time, and you'll discover... well, I'm not sure what you'll discover. I don't know if anyone's ever done that analysis. But you could do it and find out.

This is the real magic of data analysis: it gives you new ways to stare at what seem like hopelessly complex piles of data, and see meaningful patterns.___

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2015-03-03 22:33:16 (2 comments, 1 reshares, 14 +1s)Open 

This solves many problems.

This solves many problems.___

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2015-02-23 21:45:12 (5 comments, 3 reshares, 16 +1s)Open 

Do what it says... Be amazed...

Do what it says... Be amazed...___

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2015-02-19 23:34:02 (0 comments, 2 reshares, 14 +1s)Open 

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2015-02-15 11:37:34 (0 comments, 3 reshares, 8 +1s)Open 

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2015-02-15 11:36:18 (0 comments, 1 reshares, 3 +1s)Open 

hahaha comme c'est trop ca ^_^

hahaha comme c'est trop ca ^_^___

2015-01-26 10:37:47 (0 comments, 1 reshares, 5 +1s)Open 

feeding trolls is so much fun

feeding trolls is so much fun___

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2014-12-29 00:05:35 (1 comments, 2 reshares, 6 +1s)Open 

The World’s Biggest Data Breaches
Interactive version here: http://www.informationisbeautiful.net/visualizations/worlds-biggest-data-breaches-hacks/

The World’s Biggest Data Breaches
Interactive version here: http://www.informationisbeautiful.net/visualizations/worlds-biggest-data-breaches-hacks/___

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2014-11-30 22:02:10 (0 comments, 0 reshares, 3 +1s)Open 

DO YOU EVEN HYPE

DO YOU EVEN HYPE___

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2014-11-29 19:02:35 (4 comments, 0 reshares, 7 +1s)Open 

___

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2014-11-29 18:57:41 (1 comments, 2 reshares, 10 +1s)Open 

Motivational

Motivational___

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2014-11-20 20:18:21 (1 comments, 1 reshares, 9 +1s)Open 

Awesome tool for learning algorithm analysis .

Awesome tool for learning algorithm analysis .___

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2014-11-13 22:09:03 (0 comments, 1 reshares, 15 +1s)Open 

I Love You!
I am almost as big as YOU!
#cutenessoverload   #caturday   #doggif  

I Love You!
I am almost as big as YOU!
#cutenessoverload   #caturday   #doggif  ___

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2014-11-13 22:07:52 (2 comments, 0 reshares, 2 +1s)Open 

We must go deeper...

https://twitter.com/_Teggs/status/532902120199319552

We must go deeper...

https://twitter.com/_Teggs/status/532902120199319552___

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2014-11-13 22:05:36 (2 comments, 1 reshares, 23 +1s)Open 

This guy is right. 

This guy is right. ___

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2014-11-13 22:01:55 (0 comments, 1 reshares, 6 +1s)Open 

Combien cela a coûté d'aller sur 1 comète

Combien cela a coûté d'aller sur 1 comète___

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2014-11-13 21:54:20 (2 comments, 0 reshares, 8 +1s)Open 

Seulgi (Red Velvet)

Seulgi (Red Velvet)___

2014-11-12 13:08:58 (0 comments, 2 reshares, 8 +1s)Open 

Asshole +Groupon in trademark war against Free and Open Source Software.
http://www.gnome.org/groupon/

Asshole +Groupon in trademark war against Free and Open Source Software.
http://www.gnome.org/groupon/___

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2014-10-08 06:22:03 (5 comments, 5 reshares, 17 +1s)Open 

Doctors in Texas are researching Ebola

Doctors in Texas are researching Ebola___

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2014-09-11 19:02:58 (2 comments, 2 reshares, 7 +1s)Open 

IBM Linux Watch (2000) & IBM WatchPad 1.5 (2001) prototypes; first Linux watches; never made it to market. via @benjedwards

#linux   #ibm   #applewatch   #moto360  

IBM Linux Watch (2000) & IBM WatchPad 1.5 (2001) prototypes; first Linux watches; never made it to market. via @benjedwards

#linux   #ibm   #applewatch   #moto360  ___

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2014-09-05 12:19:06 (8 comments, 4 reshares, 14 +1s)Open 

A guide to using vous or tu in french.

A guide to using vous or tu in french.___

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2014-09-02 10:19:26 (3 comments, 0 reshares, 13 +1s)Open 

lol imgur

lol imgur___

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2014-08-30 07:19:56 (0 comments, 0 reshares, 8 +1s)Open 

Well, that sure is an abrupt change of attitude! I wonder WHY...

Read more here- http://bit.ly/BlackOpenCarryTexas 

Well, that sure is an abrupt change of attitude! I wonder WHY...

Read more here- http://bit.ly/BlackOpenCarryTexas ___

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2014-08-29 13:45:13 (1 comments, 1 reshares, 5 +1s)Open 

___

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2014-08-24 10:37:16 (2 comments, 2 reshares, 9 +1s)Open 

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2014-08-12 10:52:20 (1 comments, 0 reshares, 10 +1s)Open 

:(

:(___

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2014-08-06 21:18:42 (0 comments, 0 reshares, 8 +1s)Open 

#Monsanto

#Monsanto___

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2014-08-06 21:16:09 (0 comments, 0 reshares, 11 +1s)Open 

Online quizzes. I'm very guilty, and I'm sorry. 

Online quizzes. I'm very guilty, and I'm sorry. ___

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2014-08-05 19:54:12 (3 comments, 0 reshares, 2 +1s)Open 

Just a reminder. AntiVirus companies are trying to rip you off by selling you shit you don't need for Android. I'm talking about you +Trend Micro and you +McAfee. 

Antivirus for Android is a scam. Android is more secure than iOS. Proven.

Just a reminder. AntiVirus companies are trying to rip you off by selling you shit you don't need for Android. I'm talking about you +Trend Micro and you +McAfee. 

Antivirus for Android is a scam. Android is more secure than iOS. Proven.___

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2014-08-05 19:50:20 (2 comments, 1 reshares, 14 +1s)Open 

___

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2014-08-05 12:56:46 (0 comments, 0 reshares, 21 +1s)Open 

When I somehow arrive on an iTunes page and Chromium asks me with which app to open this link.

When I somehow arrive on an iTunes page and Chromium asks me with which app to open this link.___

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2014-08-05 12:18:29 (0 comments, 1 reshares, 5 +1s)Open 

truely amazing.

truely amazing.___

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2014-08-02 17:18:15 (0 comments, 0 reshares, 1 +1s)Open 

#emberjs   #spa  -> #die   #angular  

#emberjs   #spa  -> #die   #angular  ___

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2014-08-02 00:55:01 (0 comments, 1 reshares, 7 +1s)Open 

#6Things you probably didn't know about Hippos
1) They can't swim
Despite spending they daytime in water they can't actually swim, instead they mostly walk on the bottom. The closest they get to swimming is by pushing themselves off of the bottom to punt themselves forward. They can stay underwater for up to 5 minutes, which is useful considering they can't swim.
2) They graze on land at night
When the sun sets and the temperature cools down the hippos leave the water to eat grass. When on land they can reach speeds of up to 30kph for short distances, this sudden turn of speed combined with their fearsome teeth and their aggressive nature make them one of the world's most dangerous animals.
3) They 'bleed' sunscreen
For a long time it was thought they sweated blood spontaneously, because they secrete a reddish fluid that hardens and... more »

#6Things you probably didn't know about Hippos
1) They can't swim
Despite spending they daytime in water they can't actually swim, instead they mostly walk on the bottom. The closest they get to swimming is by pushing themselves off of the bottom to punt themselves forward. They can stay underwater for up to 5 minutes, which is useful considering they can't swim.
2) They graze on land at night
When the sun sets and the temperature cools down the hippos leave the water to eat grass. When on land they can reach speeds of up to 30kph for short distances, this sudden turn of speed combined with their fearsome teeth and their aggressive nature make them one of the world's most dangerous animals.
3) They 'bleed' sunscreen
For a long time it was thought they sweated blood spontaneously, because they secrete a reddish fluid that hardens and turns brown over time. This acidic fluid acts as a natural sunscreen and it kills bacteria, keeping wounds from becoming infected.
4) Their skin is 15cm thick
Despite what you might think the hippopotamus has only a thin fat layer, but it's skin is unusually thick and tough. A good thing, since males slash each other with their enormous canine teeth. Being thick skinned is also a good defense against predators, lions will occasionally attack them only to find that they can get their claws in deep enough to hang on to a panicking hippo, but not deep enough to hurt it.
5) They are related to whales
It may be hard to reconcile the idea of graceful swimmers like dolphins with bulky grazers like hippos, but cetaceans are each others closest relatives. They are grouped together in the clade Whippomorpha, which has to be one of the punniest portmanteaux of any clade.
6) There are the wild hippos in Colombia
After the death of Pablo Escobar the four hippos from his private zoo were left to fend for themselves, and they clearly thrived. There are now at least 40 and maybe 60 or more living in the lake on Escobar´s former estate and the nearby river.___

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2014-07-30 20:38:10 (0 comments, 0 reshares, 2 +1s)Open 

___

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2014-07-30 20:23:01 (0 comments, 0 reshares, 9 +1s)Open 

Via,  Pi Na(fb) 0_o

Via,  Pi Na(fb) 0_o___

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2014-07-25 19:52:53 (0 comments, 0 reshares, 8 +1s)Open 

___

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2014-07-23 18:52:27 (1 comments, 2 reshares, 22 +1s)Open 

Stop the hate.

#allkittiesarebeautiful

Stop the hate.

#allkittiesarebeautiful___

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2014-07-23 18:41:47 (0 comments, 0 reshares, 1 +1s)Open 

C'est pas faux.

C'est pas faux.___

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2014-07-21 14:35:25 (0 comments, 0 reshares, 3 +1s)Open 

___

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2014-07-20 08:59:42 (0 comments, 0 reshares, 2 +1s)Open 

Cachez votre adresse en nous donnant vos paquets !

très bon et louable service ___Cachez votre adresse en nous donnant vos paquets !

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2014-07-20 08:57:32 (1 comments, 0 reshares, 12 +1s)Open 

Know the difference. Oh crap, where did my lunch go?

Know the difference. Oh crap, where did my lunch go?___

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2014-07-19 13:55:18 (0 comments, 3 reshares, 13 +1s)Open 

Air-traffic over Ukraine today.

Air-traffic over Ukraine today.___

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2014-07-15 22:09:27 (2 comments, 3 reshares, 13 +1s)Open 

Geniuses!!! 

Geniuses!!! ___

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2014-07-15 09:12:07 (2 comments, 9 reshares, 26 +1s)Open 

The future is now

The future is now___

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2014-07-14 14:29:31 (0 comments, 0 reshares, 8 +1s)Open 

___

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